RedHat OpenShift
Getting Started with OpenShift.
Learning Resources
https://github.com/sandervanvugt/openshift
OCP
Kubernetes Distribution with additional features: Source Code Integration, CI/CD
Service Mesh like Istio Integration
CodeReady Containers https://developers.redhat.com/products/codeready-containers/overview
Offerings
RHOCP : RedHat OpenShift Container Platform: managed by customers (on-prem)
RedHat OpenShift Dedicated: RedHat managed cluster in AWS/GCP/Azure/IBM Clouds
RedHat OpenShift Online: shared across multiple customers, RedHat managed
RedHat OpenShift Kubernetes Engine : Just kubernetes
RedHat CodeReady Containers : a minimal installation
OKD: Open source upstream (OpenShift Kubernetes Distribution)
OpenShift is more expensive than Rancher, which is another Kubernetes distribution.
Understanding Containers
Docker Container engine: common
CRI-o , native in RHEL8
In OpenShift, containers are managed in Pods. A pod consists of one or more containers
OpenShift adds features on top of Kubernetes, but uses core k8s infrastructure
OpenShift adds resource types to K8s environment
Most OpenShift services are implemented in containers
Setting up a Lab
RedHat Certified Specialist in Containers and Kubernetes EX180
Chapter#6
OpenShift 3.x MiniShift (not Recommended)
OpenShift 4.x CRC (Recommended), CRC is awesome!
Alternative option: 30-day trial version of Developer Sandbox
CodeReady Containers (CRC) : all-in-one RedHat licensed OpenShift 4.x installation
Min 4vCPUs, 16GB RAM minimum
pradeep@learnOpenShift$ crc
No command given
CodeReady Containers is a tool that manages a local OpenShift 4.x cluster optimized for testing and development purposes
Usage:
crc [flags]
crc [command]
Available Commands:
bundle Manage CRC bundles
cleanup Undo config changes
completion generate the autocompletion script for the specified shell
config Modify crc configuration
console Open the OpenShift Web Console in the default browser
delete Delete the OpenShift cluster
help Help about any command
ip Get IP address of the running OpenShift cluster
oc-env Add the 'oc' executable to PATH
podman-env Setup podman environment
setup Set up prerequisites for the OpenShift cluster
start Start the OpenShift cluster
status Display status of the OpenShift cluster
stop Stop the OpenShift cluster
version Print version information
Flags:
-h, --help help for crc
--log-level string log level (e.g. "debug | info | warn | error") (default "info")
Use "crc [command] --help" for more information about a command.
pradeep@learnOpenShift$ crc status
CRC VM: Stopped
OpenShift: Stopped (v4.9.12)
Disk Usage: 0B of 0B (Inside the CRC VM)
Cache Usage: 12.78GB
Cache Directory: /Users/pradeep/.crc/cache
pradeep@learnOpenShift$ crc start
WARN A new version (1.39.0) has been published on https://developers.redhat.com/content-gateway/file/pub/openshift-v4/clients/crc/1.39.0/crc-macos-amd64.pkg
INFO Checking if running as non-root
INFO Checking if crc-admin-helper executable is cached
INFO Checking for obsolete admin-helper executable
INFO Checking if running on a supported CPU architecture
INFO Checking minimum RAM requirements
INFO Checking if running emulated on a M1 CPU
INFO Checking if HyperKit is installed
INFO Checking if qcow-tool is installed
INFO Checking if crc-driver-hyperkit is installed
INFO Starting CodeReady Containers VM for OpenShift 4.9.12...
INFO CodeReady Containers instance is running with IP 127.0.0.1
INFO CodeReady Containers VM is running
INFO Check internal and public DNS query...
INFO Check DNS query from host...
INFO Verifying validity of the kubelet certificates...
INFO Starting OpenShift kubelet service
INFO Kubelet client certificate has expired, renewing it... [will take up to 8 minutes]
INFO Kubelet serving certificate has expired, waiting for automatic renewal... [will take up to 8 minutes]
INFO Waiting for kube-apiserver availability... [takes around 2min]
INFO Waiting for user's pull secret part of instance disk...
INFO Starting OpenShift cluster... [waiting for the cluster to stabilize]
INFO Operator operator-lifecycle-manager-packageserver is progressing
INFO 2 operators are progressing: kube-apiserver, openshift-controller-manager
INFO 2 operators are progressing: kube-apiserver, openshift-controller-manager
INFO 2 operators are progressing: kube-apiserver, openshift-controller-manager
INFO 2 operators are progressing: kube-apiserver, openshift-controller-manager
INFO 2 operators are progressing: kube-apiserver, openshift-controller-manager
INFO 2 operators are progressing: kube-apiserver, openshift-controller-manager
INFO Operator openshift-controller-manager is progressing
INFO Operator openshift-controller-manager is progressing
INFO Operator openshift-controller-manager is progressing
INFO Operator openshift-controller-manager is progressing
INFO Operator openshift-controller-manager is progressing
INFO Operator openshift-controller-manager is progressing
INFO All operators are available. Ensuring stability...
INFO Operator authentication is not yet available
ERRO Cluster is not ready: cluster operators are still not stable after 10m44.701469756s
INFO Adding crc-admin and crc-developer contexts to kubeconfig...
Started the OpenShift cluster.
The server is accessible via web console at:
https://console-openshift-console.apps-crc.testing
Log in as administrator:
Username: kubeadmin
Password: ZyxGy-rKUxa-kE4Pp-EJLFc
Log in as user:
Username: developer
Password: developer
Use the 'oc' command line interface:
$ eval $(crc oc-env)
$ oc login -u developer https://api.crc.testing:6443
pradeep@learnOpenShift$ crc status
CRC VM: Running
OpenShift: Starting (v4.9.12)
Disk Usage: 13.14GB of 32.74GB (Inside the CRC VM)
Cache Usage: 12.78GB
Cache Directory: /Users/pradeep/.crc/cache
pradeep@learnOpenShift$ eval $(crc oc-env)
pradeep@learnOpenShift$ crc console --credentials
To login as a regular user, run 'oc login -u developer -p developer https://api.crc.testing:6443'.
To login as an admin, run 'oc login -u kubeadmin -p ZyxGy-rKUxa-kE4Pp-EJLFc https://api.crc.testing:6443'
pradeep@learnOpenShift$ oc login -u developer https://api.crc.testing:6443
Logged into "https://api.crc.testing:6443" as "developer" using existing credentials.
You don't have any projects. You can try to create a new project, by running
oc new-project <projectname>
Setting up an Application in OpenShift
Using Console
pradeep@learnOpenShift$ oc login --token=sha256~pWLPko6xkJ71k00adi-k3pyXCVr4TJrIs5l8muLOUnk --server=https://api.crc.testing:6443
Logged into "https://api.crc.testing:6443" as "developer" using the token provided.
You have one project on this server: "pradeep-os-demo"
Using project "pradeep-os-demo".
pradeep@learnOpenShift$ oc get all
NAME READY STATUS RESTARTS AGE
pod/pradeep-cake-1-build 0/1 Completed 0 40m
pod/pradeep-cake-64796f74fd-mmh6p 1/1 Running 0 9m3s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/pradeep-cake ClusterIP 10.217.5.152 <none> 8080/TCP,8443/TCP 40m
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/pradeep-cake 1/1 1 1 40m
NAME DESIRED CURRENT READY AGE
replicaset.apps/pradeep-cake-64796f74fd 1 1 1 9m3s
replicaset.apps/pradeep-cake-95f4d7758 0 0 0 40m
NAME TYPE FROM LATEST
buildconfig.build.openshift.io/pradeep-cake Source Git 2
NAME TYPE FROM STATUS STARTED DURATION
build.build.openshift.io/pradeep-cake-1 Source Git@ba4b1cd Complete 40 minutes ago 31m38s
NAME IMAGE REPOSITORY TAGS UPDATED
imagestream.image.openshift.io/pradeep-cake default-route-openshift-image-registry.apps-crc.testing/pradeep-os-demo/pradeep-cake latest 9 minutes ago
NAME HOST/PORT PATH SERVICES PORT TERMINATION WILDCARD
route.route.openshift.io/pradeep-cake pradeep-cake-pradeep-os-demo.apps-crc.testing pradeep-cake 8080-tcp None
Switching to Administrator Persona
![/assets/images/OS-3]https://pradeepgadde.com/blog(/assets/images/OS-19.png)
After deleting the pod from failed build
pradeep@learnOpenShift$ oc get all
NAME READY STATUS RESTARTS AGE
pod/pradeep-cake-64796f74fd-mmh6p 1/1 Running 0 13m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/pradeep-cake ClusterIP 10.217.5.152 <none> 8080/TCP,8443/TCP 45m
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/pradeep-cake 1/1 1 1 45m
NAME DESIRED CURRENT READY AGE
replicaset.apps/pradeep-cake-64796f74fd 1 1 1 13m
replicaset.apps/pradeep-cake-95f4d7758 0 0 0 45m
NAME TYPE FROM LATEST
buildconfig.build.openshift.io/pradeep-cake Source Git 2
NAME TYPE FROM STATUS STARTED DURATION
build.build.openshift.io/pradeep-cake-1 Source Git@ba4b1cd Complete 45 minutes ago 31m38s
NAME IMAGE REPOSITORY TAGS UPDATED
imagestream.image.openshift.io/pradeep-cake default-route-openshift-image-registry.apps-crc.testing/pradeep-os-demo/pradeep-cake latest 13 minutes ago
NAME HOST/PORT PATH SERVICES PORT TERMINATION WILDCARD
route.route.openshift.io/pradeep-cake pradeep-cake-pradeep-os-demo.apps-crc.testing pradeep-cake 8080-tcp None
pradeep@learnOpenShift$ oc projects
You have one project on this server: "pradeep-os-demo".
Using project "pradeep-os-demo" on server "https://api.crc.testing:6443".
pradeep@learnOpenShift$ oc get pods
NAME READY STATUS RESTARTS AGE
pradeep-cake-64796f74fd-mmh6p 1/1 Running 0 18m
pradeep@learnOpenShift$ oc get nodes
Error from server (Forbidden): nodes is forbidden: User "developer" cannot list resource "nodes" in API group "" at the cluster scope
pradeep@learnOpenShift$ oc get deploy
NAME READY UP-TO-DATE AVAILABLE AGE
pradeep-cake 1/1 1 1 50m
pradeep@learnOpenShift$ oc get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
pradeep-cake ClusterIP 10.217.5.152 <none> 8080/TCP,8443/TCP 50m
pradeep@learnOpenShift$ oc describe pod pradeep-cake-64796f74fd-mmh6p
Name: pradeep-cake-64796f74fd-mmh6p
Namespace: pradeep-os-demo
Priority: 0
Node: crc-xxcfw-master-0/192.168.126.11
Start Time: Tue, 22 Feb 2022 20:54:31 +0530
Labels: app=pradeep-cake
deploymentconfig=pradeep-cake
pod-template-hash=64796f74fd
Annotations: k8s.v1.cni.cncf.io/network-status:
[{
"name": "openshift-sdn",
"interface": "eth0",
"ips": [
"10.217.0.68"
],
"default": true,
"dns": {}
}]
k8s.v1.cni.cncf.io/networks-status:
[{
"name": "openshift-sdn",
"interface": "eth0",
"ips": [
"10.217.0.68"
],
"default": true,
"dns": {}
}]
openshift.io/scc: restricted
Status: Running
IP: 10.217.0.68
IPs:
IP: 10.217.0.68
Controlled By: ReplicaSet/pradeep-cake-64796f74fd
Containers:
pradeep-cake:
Container ID: cri-o://1801d269a5ba5c12a1228678fe09452e670f94944dc91003d3d0fe38f3d9f4d8
Image: image-registry.openshift-image-registry.svc:5000/pradeep-os-demo/pradeep-cake@sha256:66900b89f25f97553f3fe81f91354d4fd1746d0265ad135b34acffbf211b62ef
Image ID: image-registry.openshift-image-registry.svc:5000/pradeep-os-demo/pradeep-cake@sha256:66900b89f25f97553f3fe81f91354d4fd1746d0265ad135b34acffbf211b62ef
Ports: 8080/TCP, 8443/TCP
Host Ports: 0/TCP, 0/TCP
State: Running
Started: Tue, 22 Feb 2022 20:56:37 +0530
Ready: True
Restart Count: 0
Environment: <none>
Mounts:
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-789n7 (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
kube-api-access-789n7:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional: <nil>
DownwardAPI: true
ConfigMapName: openshift-service-ca.crt
ConfigMapOptional: <nil>
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 19m default-scheduler Successfully assigned pradeep-os-demo/pradeep-cake-64796f74fd-mmh6p to crc-xxcfw-master-0
Normal AddedInterface 19m multus Add eth0 [10.217.0.68/23] from openshift-sdn
Normal Pulling 19m kubelet Pulling image "image-registry.openshift-image-registry.svc:5000/pradeep-os-demo/pradeep-cake@sha256:66900b89f25f97553f3fe81f91354d4fd1746d0265ad135b34acffbf211b62ef"
Normal Pulled 17m kubelet Successfully pulled image "image-registry.openshift-image-registry.svc:5000/pradeep-os-demo/pradeep-cake@sha256:66900b89f25f97553f3fe81f91354d4fd1746d0265ad135b34acffbf211b62ef" in 2m1.585839677s
Normal Created 17m kubelet Created container pradeep-cake
Normal Started 17m kubelet Started container pradeep-cake
pradeep@learnOpenShift$ oc api-resources
NAME SHORTNAMES APIVERSION NAMESPACED KIND
bindings v1 true Binding
componentstatuses cs v1 false ComponentStatus
configmaps cm v1 true ConfigMap
endpoints ep v1 true Endpoints
events ev v1 true Event
limitranges limits v1 true LimitRange
namespaces ns v1 false Namespace
nodes no v1 false Node
persistentvolumeclaims pvc v1 true PersistentVolumeClaim
persistentvolumes pv v1 false PersistentVolume
pods po v1 true Pod
podtemplates v1 true PodTemplate
replicationcontrollers rc v1 true ReplicationController
resourcequotas quota v1 true ResourceQuota
secrets v1 true Secret
serviceaccounts sa v1 true ServiceAccount
services svc v1 true Service
mutatingwebhookconfigurations admissionregistration.k8s.io/v1 false MutatingWebhookConfiguration
validatingwebhookconfigurations admissionregistration.k8s.io/v1 false ValidatingWebhookConfiguration
customresourcedefinitions crd,crds apiextensions.k8s.io/v1 false CustomResourceDefinition
apiservices apiregistration.k8s.io/v1 false APIService
apirequestcounts apiserver.openshift.io/v1 false APIRequestCount
controllerrevisions apps/v1 true ControllerRevision
daemonsets ds apps/v1 true DaemonSet
deployments deploy apps/v1 true Deployment
replicasets rs apps/v1 true ReplicaSet
statefulsets sts apps/v1 true StatefulSet
deploymentconfigs dc apps.openshift.io/v1 true DeploymentConfig
tokenreviews authentication.k8s.io/v1 false TokenReview
localsubjectaccessreviews authorization.k8s.io/v1 true LocalSubjectAccessReview
selfsubjectaccessreviews authorization.k8s.io/v1 false SelfSubjectAccessReview
selfsubjectrulesreviews authorization.k8s.io/v1 false SelfSubjectRulesReview
subjectaccessreviews authorization.k8s.io/v1 false SubjectAccessReview
clusterrolebindings authorization.openshift.io/v1 false ClusterRoleBinding
clusterroles authorization.openshift.io/v1 false ClusterRole
localresourceaccessreviews authorization.openshift.io/v1 true LocalResourceAccessReview
localsubjectaccessreviews authorization.openshift.io/v1 true LocalSubjectAccessReview
resourceaccessreviews authorization.openshift.io/v1 false ResourceAccessReview
rolebindingrestrictions authorization.openshift.io/v1 true RoleBindingRestriction
rolebindings authorization.openshift.io/v1 true RoleBinding
roles authorization.openshift.io/v1 true Role
selfsubjectrulesreviews authorization.openshift.io/v1 true SelfSubjectRulesReview
subjectaccessreviews authorization.openshift.io/v1 false SubjectAccessReview
subjectrulesreviews authorization.openshift.io/v1 true SubjectRulesReview
horizontalpodautoscalers hpa autoscaling/v1 true HorizontalPodAutoscaler
clusterautoscalers ca autoscaling.openshift.io/v1 false ClusterAutoscaler
machineautoscalers ma autoscaling.openshift.io/v1beta1 true MachineAutoscaler
cronjobs cj batch/v1 true CronJob
jobs batch/v1 true Job
buildconfigs bc build.openshift.io/v1 true BuildConfig
builds build.openshift.io/v1 true Build
certificatesigningrequests csr certificates.k8s.io/v1 false CertificateSigningRequest
credentialsrequests cloudcredential.openshift.io/v1 true CredentialsRequest
apiservers config.openshift.io/v1 false APIServer
authentications config.openshift.io/v1 false Authentication
builds config.openshift.io/v1 false Build
clusteroperators co config.openshift.io/v1 false ClusterOperator
clusterversions config.openshift.io/v1 false ClusterVersion
consoles config.openshift.io/v1 false Console
dnses config.openshift.io/v1 false DNS
featuregates config.openshift.io/v1 false FeatureGate
images config.openshift.io/v1 false Image
infrastructures config.openshift.io/v1 false Infrastructure
ingresses config.openshift.io/v1 false Ingress
networks config.openshift.io/v1 false Network
oauths config.openshift.io/v1 false OAuth
operatorhubs config.openshift.io/v1 false OperatorHub
projects config.openshift.io/v1 false Project
proxies config.openshift.io/v1 false Proxy
schedulers config.openshift.io/v1 false Scheduler
consoleclidownloads console.openshift.io/v1 false ConsoleCLIDownload
consoleexternalloglinks console.openshift.io/v1 false ConsoleExternalLogLink
consolelinks console.openshift.io/v1 false ConsoleLink
consolenotifications console.openshift.io/v1 false ConsoleNotification
consoleplugins console.openshift.io/v1alpha1 false ConsolePlugin
consolequickstarts console.openshift.io/v1 false ConsoleQuickStart
consoleyamlsamples console.openshift.io/v1 false ConsoleYAMLSample
podnetworkconnectivitychecks controlplane.operator.openshift.io/v1alpha1 true PodNetworkConnectivityCheck
leases coordination.k8s.io/v1 true Lease
endpointslices discovery.k8s.io/v1 true EndpointSlice
events ev events.k8s.io/v1 true Event
flowschemas flowcontrol.apiserver.k8s.io/v1beta1 false FlowSchema
prioritylevelconfigurations flowcontrol.apiserver.k8s.io/v1beta1 false PriorityLevelConfiguration
helmchartrepositories helm.openshift.io/v1beta1 false HelmChartRepository
images image.openshift.io/v1 false Image
imagesignatures image.openshift.io/v1 false ImageSignature
imagestreamimages isimage image.openshift.io/v1 true ImageStreamImage
imagestreamimports image.openshift.io/v1 true ImageStreamImport
imagestreammappings image.openshift.io/v1 true ImageStreamMapping
imagestreams is image.openshift.io/v1 true ImageStream
imagestreamtags istag image.openshift.io/v1 true ImageStreamTag
imagetags itag image.openshift.io/v1 true ImageTag
configs imageregistry.operator.openshift.io/v1 false Config
imagepruners imageregistry.operator.openshift.io/v1 false ImagePruner
dnsrecords ingress.operator.openshift.io/v1 true DNSRecord
network-attachment-definitions net-attach-def k8s.cni.cncf.io/v1 true NetworkAttachmentDefinition
machinehealthchecks mhc,mhcs machine.openshift.io/v1beta1 true MachineHealthCheck
machines machine.openshift.io/v1beta1 true Machine
machinesets machine.openshift.io/v1beta1 true MachineSet
containerruntimeconfigs ctrcfg machineconfiguration.openshift.io/v1 false ContainerRuntimeConfig
controllerconfigs machineconfiguration.openshift.io/v1 false ControllerConfig
kubeletconfigs machineconfiguration.openshift.io/v1 false KubeletConfig
machineconfigpools mcp machineconfiguration.openshift.io/v1 false MachineConfigPool
machineconfigs mc machineconfiguration.openshift.io/v1 false MachineConfig
baremetalhosts bmh,bmhost metal3.io/v1alpha1 true BareMetalHost
provisionings metal3.io/v1alpha1 false Provisioning
storagestates migration.k8s.io/v1alpha1 false StorageState
storageversionmigrations migration.k8s.io/v1alpha1 false StorageVersionMigration
alertmanagerconfigs monitoring.coreos.com/v1alpha1 true AlertmanagerConfig
alertmanagers monitoring.coreos.com/v1 true Alertmanager
podmonitors monitoring.coreos.com/v1 true PodMonitor
probes monitoring.coreos.com/v1 true Probe
prometheuses monitoring.coreos.com/v1 true Prometheus
prometheusrules monitoring.coreos.com/v1 true PrometheusRule
servicemonitors monitoring.coreos.com/v1 true ServiceMonitor
thanosrulers monitoring.coreos.com/v1 true ThanosRuler
clusternetworks network.openshift.io/v1 false ClusterNetwork
egressnetworkpolicies network.openshift.io/v1 true EgressNetworkPolicy
hostsubnets network.openshift.io/v1 false HostSubnet
netnamespaces network.openshift.io/v1 false NetNamespace
egressrouters network.operator.openshift.io/v1 true EgressRouter
operatorpkis network.operator.openshift.io/v1 true OperatorPKI
ingressclasses networking.k8s.io/v1 false IngressClass
ingresses ing networking.k8s.io/v1 true Ingress
networkpolicies netpol networking.k8s.io/v1 true NetworkPolicy
runtimeclasses node.k8s.io/v1 false RuntimeClass
oauthaccesstokens oauth.openshift.io/v1 false OAuthAccessToken
oauthauthorizetokens oauth.openshift.io/v1 false OAuthAuthorizeToken
oauthclientauthorizations oauth.openshift.io/v1 false OAuthClientAuthorization
oauthclients oauth.openshift.io/v1 false OAuthClient
tokenreviews oauth.openshift.io/v1 false TokenReview
useroauthaccesstokens oauth.openshift.io/v1 false UserOAuthAccessToken
authentications operator.openshift.io/v1 false Authentication
cloudcredentials operator.openshift.io/v1 false CloudCredential
clustercsidrivers operator.openshift.io/v1 false ClusterCSIDriver
configs operator.openshift.io/v1 false Config
consoles operator.openshift.io/v1 false Console
csisnapshotcontrollers operator.openshift.io/v1 false CSISnapshotController
dnses operator.openshift.io/v1 false DNS
etcds operator.openshift.io/v1 false Etcd
imagecontentsourcepolicies operator.openshift.io/v1alpha1 false ImageContentSourcePolicy
ingresscontrollers operator.openshift.io/v1 true IngressController
kubeapiservers operator.openshift.io/v1 false KubeAPIServer
kubecontrollermanagers operator.openshift.io/v1 false KubeControllerManager
kubeschedulers operator.openshift.io/v1 false KubeScheduler
kubestorageversionmigrators operator.openshift.io/v1 false KubeStorageVersionMigrator
networks operator.openshift.io/v1 false Network
openshiftapiservers operator.openshift.io/v1 false OpenShiftAPIServer
openshiftcontrollermanagers operator.openshift.io/v1 false OpenShiftControllerManager
servicecas operator.openshift.io/v1 false ServiceCA
storages operator.openshift.io/v1 false Storage
catalogsources catsrc operators.coreos.com/v1alpha1 true CatalogSource
clusterserviceversions csv,csvs operators.coreos.com/v1alpha1 true ClusterServiceVersion
installplans ip operators.coreos.com/v1alpha1 true InstallPlan
operatorconditions condition operators.coreos.com/v2 true OperatorCondition
operatorgroups og operators.coreos.com/v1 true OperatorGroup
operators operators.coreos.com/v1 false Operator
subscriptions sub,subs operators.coreos.com/v1alpha1 true Subscription
packagemanifests packages.operators.coreos.com/v1 true PackageManifest
poddisruptionbudgets pdb policy/v1 true PodDisruptionBudget
podsecuritypolicies psp policy/v1beta1 false PodSecurityPolicy
projectrequests project.openshift.io/v1 false ProjectRequest
projects project.openshift.io/v1 false Project
appliedclusterresourcequotas quota.openshift.io/v1 true AppliedClusterResourceQuota
clusterresourcequotas clusterquota quota.openshift.io/v1 false ClusterResourceQuota
clusterrolebindings rbac.authorization.k8s.io/v1 false ClusterRoleBinding
clusterroles rbac.authorization.k8s.io/v1 false ClusterRole
rolebindings rbac.authorization.k8s.io/v1 true RoleBinding
roles rbac.authorization.k8s.io/v1 true Role
routes route.openshift.io/v1 true Route
configs samples.operator.openshift.io/v1 false Config
priorityclasses pc scheduling.k8s.io/v1 false PriorityClass
rangeallocations security.internal.openshift.io/v1 false RangeAllocation
podsecuritypolicyreviews security.openshift.io/v1 true PodSecurityPolicyReview
podsecuritypolicyselfsubjectreviews security.openshift.io/v1 true PodSecurityPolicySelfSubjectReview
podsecuritypolicysubjectreviews security.openshift.io/v1 true PodSecurityPolicySubjectReview
rangeallocations security.openshift.io/v1 false RangeAllocation
securitycontextconstraints scc security.openshift.io/v1 false SecurityContextConstraints
csidrivers storage.k8s.io/v1 false CSIDriver
csinodes storage.k8s.io/v1 false CSINode
csistoragecapacities storage.k8s.io/v1beta1 true CSIStorageCapacity
storageclasses sc storage.k8s.io/v1 false StorageClass
volumeattachments storage.k8s.io/v1 false VolumeAttachment
brokertemplateinstances template.openshift.io/v1 false BrokerTemplateInstance
processedtemplates template.openshift.io/v1 true Template
templateinstances template.openshift.io/v1 true TemplateInstance
templates template.openshift.io/v1 true Template
profiles tuned.openshift.io/v1 true Profile
tuneds tuned.openshift.io/v1 true Tuned
groups user.openshift.io/v1 false Group
identities user.openshift.io/v1 false Identity
useridentitymappings user.openshift.io/v1 false UserIdentityMapping
users user.openshift.io/v1 false User
ippools whereabouts.cni.cncf.io/v1alpha1 true IPPool
overlappingrangeipreservations whereabouts.cni.cncf.io/v1alpha1 true OverlappingRangeIPReservation
Setting up an Application using oc new-app
pradeep@learnOpenShift$ oc whoami
developer
pradeep@learnOpenShift$ oc new-project mysql
Now using project "mysql" on server "https://api.crc.testing:6443".
You can add applications to this project with the 'new-app' command. For example, try:
oc new-app rails-postgresql-example
to build a new example application in Ruby. Or use kubectl to deploy a simple Kubernetes application:
kubectl create deployment hello-node --image=k8s.gcr.io/serve_hostname
pradeep@learnOpenShift$ oc new-app --docker-image=mysql:latest --name=mysql-openshift -e MYSQL_USER=myuser -e MYSQL_PASSWORD=password -e
MYSQL_DATABASE=mydb -e MYSQL_ROOT_PASSWORD=password
Flag --docker-image has been deprecated, Deprecated flag use --image
--> Found container image 17b062d (5 days old) from Docker Hub for "mysql:latest"
* An image stream tag will be created as "mysql-openshift:latest" that will track this image
--> Creating resources ...
imagestream.image.openshift.io "mysql-openshift" created
deployment.apps "mysql-openshift" created
service "mysql-openshift" created
--> Success
Application is not exposed. You can expose services to the outside world by executing one or more of the commands below:
'oc expose service/mysql-openshift'
Run 'oc status' to view your app.
pradeep@learnOpenShift$ oc status
In project mysql on server https://api.crc.testing:6443
svc/mysql-openshift - 10.217.4.70 ports 3306, 33060
deployment/mysql-openshift deploys istag/mysql-openshift:latest
deployment #2 running for about a minute - 0/1 pods
deployment #1 deployed 2 minutes ago - 0/1 pods growing to 1
1 info identified, use 'oc status --suggest' to see details.
pradeep@learnOpenShift$ oc get all
NAME READY STATUS RESTARTS AGE
pod/mysql-openshift-f5b68568f-shwz7 1/1 Running 0 8m43s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/mysql-openshift ClusterIP 10.217.4.70 <none> 3306/TCP,33060/TCP 8m46s
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/mysql-openshift 1/1 1 1 8m46s
NAME DESIRED CURRENT READY AGE
replicaset.apps/mysql-openshift-68996c4c8c 0 0 0 8m46s
replicaset.apps/mysql-openshift-f5b68568f 1 1 1 8m43s
NAME IMAGE REPOSITORY TAGS UPDATED
imagestream.image.openshift.io/mysql-openshift default-route-openshift-image-registry.apps-crc.testing/mysql/mysql-openshift latest 8 minutes ago
pradeep@learnOpenShift$ oc get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
mysql-openshift-f5b68568f-shwz7 1/1 Running 0 9m19s 10.217.0.64 crc-xxcfw-master-0 <none> <none>
Log in to the web console and see the new application in Project: mysql > Overview
pradeep@learnOpenShift$ oc get events
LAST SEEN TYPE REASON OBJECT MESSAGE
12m Warning FailedCreate replicaset/mysql-openshift-68996c4c8c Error creating: Pod "mysql-openshift-68996c4c8c-n8wtz" is invalid: spec.containers[0].image: Invalid value: " ": must not have leading or trailing whitespace
12m Warning FailedCreate replicaset/mysql-openshift-68996c4c8c Error creating: Pod "mysql-openshift-68996c4c8c-8kv89" is invalid: spec.containers[0].image: Invalid value: " ": must not have leading or trailing whitespace
12m Warning FailedCreate replicaset/mysql-openshift-68996c4c8c Error creating: Pod "mysql-openshift-68996c4c8c-fl2b8" is invalid: spec.containers[0].image: Invalid value: " ": must not have leading or trailing whitespace
12m Warning FailedCreate replicaset/mysql-openshift-68996c4c8c Error creating: Pod "mysql-openshift-68996c4c8c-wskrp" is invalid: spec.containers[0].image: Invalid value: " ": must not have leading or trailing whitespace
12m Warning FailedCreate replicaset/mysql-openshift-68996c4c8c Error creating: Pod "mysql-openshift-68996c4c8c-kgncj" is invalid: spec.containers[0].image: Invalid value: " ": must not have leading or trailing whitespace
12m Warning FailedCreate replicaset/mysql-openshift-68996c4c8c Error creating: Pod "mysql-openshift-68996c4c8c-4c8dz" is invalid: spec.containers[0].image: Invalid value: " ": must not have leading or trailing whitespace
12m Warning FailedCreate replicaset/mysql-openshift-68996c4c8c Error creating: Pod "mysql-openshift-68996c4c8c-r5ksg" is invalid: spec.containers[0].image: Invalid value: " ": must not have leading or trailing whitespace
12m Warning FailedCreate replicaset/mysql-openshift-68996c4c8c Error creating: Pod "mysql-openshift-68996c4c8c-pc94d" is invalid: spec.containers[0].image: Invalid value: " ": must not have leading or trailing whitespace
12m Warning FailedCreate replicaset/mysql-openshift-68996c4c8c Error creating: Pod "mysql-openshift-68996c4c8c-n2gkp" is invalid: spec.containers[0].image: Invalid value: " ": must not have leading or trailing whitespace
11m Warning FailedCreate replicaset/mysql-openshift-68996c4c8c (combined from similar events): Error creating: Pod "mysql-openshift-68996c4c8c-5pkcx" is invalid: spec.containers[0].image: Invalid value: " ": must not have leading or trailing whitespace
12m Normal Scheduled pod/mysql-openshift-f5b68568f-shwz7 Successfully assigned mysql/mysql-openshift-f5b68568f-shwz7 to crc-xxcfw-master-0
12m Normal AddedInterface pod/mysql-openshift-f5b68568f-shwz7 Add eth0 [10.217.0.64/23] from openshift-sdn
10m Normal Pulling pod/mysql-openshift-f5b68568f-shwz7 Pulling image "mysql@sha256:e9c9e3680bbadd5230a62c5548793bd8e59cbcc868032781e48bd53e888bd82f"
11m Warning Failed pod/mysql-openshift-f5b68568f-shwz7 Failed to pull image "mysql@sha256:e9c9e3680bbadd5230a62c5548793bd8e59cbcc868032781e48bd53e888bd82f": rpc error: code = Unknown desc = reading blob sha256:5d726bac08eac44e8c39b1afbe20d14e2288e6846dd17299ae5725de86124bc7: Get "https://registry-1.docker.io/v2/library/mysql/blobs/sha256:5d726bac08eac44e8c39b1afbe20d14e2288e6846dd17299ae5725de86124bc7": net/http: TLS handshake timeout
11m Warning Failed pod/mysql-openshift-f5b68568f-shwz7 Error: ErrImagePull
11m Normal BackOff pod/mysql-openshift-f5b68568f-shwz7 Back-off pulling image "mysql@sha256:e9c9e3680bbadd5230a62c5548793bd8e59cbcc868032781e48bd53e888bd82f"
11m Warning Failed pod/mysql-openshift-f5b68568f-shwz7 Error: ImagePullBackOff
9m31s Normal Pulled pod/mysql-openshift-f5b68568f-shwz7 Successfully pulled image "mysql@sha256:e9c9e3680bbadd5230a62c5548793bd8e59cbcc868032781e48bd53e888bd82f" in 1m17.121697748s
9m31s Normal Created pod/mysql-openshift-f5b68568f-shwz7 Created container mysql-openshift
9m31s Normal Started pod/mysql-openshift-f5b68568f-shwz7 Started container mysql-openshift
12m Normal SuccessfulCreate replicaset/mysql-openshift-f5b68568f Created pod: mysql-openshift-f5b68568f-shwz7
12m Normal ScalingReplicaSet deployment/mysql-openshift Scaled up replica set mysql-openshift-68996c4c8c to 1
12m Normal ScalingReplicaSet deployment/mysql-openshift Scaled up replica set mysql-openshift-f5b68568f to 1
9m30s Normal ScalingReplicaSet deployment/mysql-openshift Scaled down replica set mysql-openshift-68996c4c8c to 0
pradeep@learnOpenShift$ oc logs pod/mysql-openshift-f5b68568f-shwz7
2022-02-23 04:10:46+00:00 [Note] [Entrypoint]: Entrypoint script for MySQL Server 8.0.28-1debian10 started.
2022-02-23 04:10:47+00:00 [Note] [Entrypoint]: Initializing database files
2022-02-23T04:10:47.109360Z 0 [System] [MY-013169] [Server] /usr/sbin/mysqld (mysqld 8.0.28) initializing of server in progress as process 23
2022-02-23T04:10:47.119625Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2022-02-23T04:10:49.742825Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2022-02-23T04:10:51.821227Z 6 [Warning] [MY-010453] [Server] root@localhost is created with an empty password ! Please consider switching off the --initialize-insecure option.
2022-02-23 04:10:56+00:00 [Note] [Entrypoint]: Database files initialized
2022-02-23 04:10:56+00:00 [Note] [Entrypoint]: Starting temporary server
2022-02-23T04:10:58.380929Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.28) starting as process 72
2022-02-23T04:10:58.577032Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2022-02-23T04:10:59.882536Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2022-02-23T04:11:00.781991Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2022-02-23T04:11:00.782167Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2022-02-23T04:11:00.784296Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location '/var/run/mysqld' in the path is accessible to all OS users. Consider choosing a different directory.
2022-02-23T04:11:00.851759Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.28' socket: '/var/run/mysqld/mysqld.sock' port: 0 MySQL Community Server - GPL.
2022-02-23T04:11:00.855887Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Socket: /var/run/mysqld/mysqlx.sock
2022-02-23 04:11:00+00:00 [Note] [Entrypoint]: Temporary server started.
Warning: Unable to load '/usr/share/zoneinfo/iso3166.tab' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/leap-seconds.list' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/zone.tab' as time zone. Skipping it.
Warning: Unable to load '/usr/share/zoneinfo/zone1970.tab' as time zone. Skipping it.
2022-02-23 04:11:07+00:00 [Note] [Entrypoint]: Creating database mydb
2022-02-23 04:11:07+00:00 [Note] [Entrypoint]: Creating user myuser
2022-02-23 04:11:07+00:00 [Note] [Entrypoint]: Giving user myuser access to schema mydb
2022-02-23 04:11:07+00:00 [Note] [Entrypoint]: Stopping temporary server
2022-02-23T04:11:07.421551Z 13 [System] [MY-013172] [Server] Received SHUTDOWN from user root. Shutting down mysqld (Version: 8.0.28).
2022-02-23T04:11:09.892006Z 0 [System] [MY-010910] [Server] /usr/sbin/mysqld: Shutdown complete (mysqld 8.0.28) MySQL Community Server - GPL.
2022-02-23 04:11:10+00:00 [Note] [Entrypoint]: Temporary server stopped
2022-02-23 04:11:10+00:00 [Note] [Entrypoint]: MySQL init process done. Ready for start up.
2022-02-23T04:11:10.813524Z 0 [System] [MY-010116] [Server] /usr/sbin/mysqld (mysqld 8.0.28) starting as process 1
2022-02-23T04:11:10.841138Z 1 [System] [MY-013576] [InnoDB] InnoDB initialization has started.
2022-02-23T04:11:11.181491Z 1 [System] [MY-013577] [InnoDB] InnoDB initialization has ended.
2022-02-23T04:11:11.468439Z 0 [Warning] [MY-010068] [Server] CA certificate ca.pem is self signed.
2022-02-23T04:11:11.468601Z 0 [System] [MY-013602] [Server] Channel mysql_main configured to support TLS. Encrypted connections are now supported for this channel.
2022-02-23T04:11:11.478843Z 0 [Warning] [MY-011810] [Server] Insecure configuration for --pid-file: Location '/var/run/mysqld' in the path is accessible to all OS users. Consider choosing a different directory.
2022-02-23T04:11:11.506637Z 0 [System] [MY-011323] [Server] X Plugin ready for connections. Bind-address: '::' port: 33060, socket: /var/run/mysqld/mysqlx.sock
2022-02-23T04:11:11.506839Z 0 [System] [MY-010931] [Server] /usr/sbin/mysqld: ready for connections. Version: '8.0.28' socket: '/var/run/mysqld/mysqld.sock' port: 3306 MySQL Community Server - GPL.
pradeep@learnOpenShift$ oc describe pod mysql-openshift-f5b68568f-shwz
Name: mysql-openshift-f5b68568f-shwz7
Namespace: mysql
Priority: 0
Node: crc-xxcfw-master-0/192.168.126.11
Start Time: Wed, 23 Feb 2022 09:37:25 +0530
Labels: deployment=mysql-openshift
pod-template-hash=f5b68568f
Annotations: k8s.v1.cni.cncf.io/network-status:
[{
"name": "openshift-sdn",
"interface": "eth0",
"ips": [
"10.217.0.64"
],
"default": true,
"dns": {}
}]
k8s.v1.cni.cncf.io/networks-status:
[{
"name": "openshift-sdn",
"interface": "eth0",
"ips": [
"10.217.0.64"
],
"default": true,
"dns": {}
}]
openshift.io/generated-by: OpenShiftNewApp
openshift.io/scc: restricted
Status: Running
IP: 10.217.0.64
IPs:
IP: 10.217.0.64
Controlled By: ReplicaSet/mysql-openshift-f5b68568f
Containers:
mysql-openshift:
Container ID: cri-o://bd324439c67da1c3efd52709d4718b54f6e0619c0540c7ca1f8d59a61984dceb
Image: mysql@sha256:e9c9e3680bbadd5230a62c5548793bd8e59cbcc868032781e48bd53e888bd82f
Image ID: docker.io/library/mysql@sha256:e9c9e3680bbadd5230a62c5548793bd8e59cbcc868032781e48bd53e888bd82f
Ports: 3306/TCP, 33060/TCP
Host Ports: 0/TCP, 0/TCP
State: Running
Started: Wed, 23 Feb 2022 09:40:46 +0530
Ready: True
Restart Count: 0
Environment:
MYSQL_DATABASE: mydb
MYSQL_PASSWORD: password
MYSQL_ROOT_PASSWORD: password
MYSQL_USER: myuser
Mounts:
/var/lib/mysql from mysql-openshift-volume-1 (rw)
/var/run/secrets/kubernetes.io/serviceaccount from kube-api-access-mqqkz (ro)
Conditions:
Type Status
Initialized True
Ready True
ContainersReady True
PodScheduled True
Volumes:
mysql-openshift-volume-1:
Type: EmptyDir (a temporary directory that shares a pod's lifetime)
Medium:
SizeLimit: <unset>
kube-api-access-mqqkz:
Type: Projected (a volume that contains injected data from multiple sources)
TokenExpirationSeconds: 3607
ConfigMapName: kube-root-ca.crt
ConfigMapOptional: <nil>
DownwardAPI: true
ConfigMapName: openshift-service-ca.crt
ConfigMapOptional: <nil>
QoS Class: BestEffort
Node-Selectors: <none>
Tolerations: node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 17m default-scheduler Successfully assigned mysql/mysql-openshift-f5b68568f-shwz7 to crc-xxcfw-master-0
Normal AddedInterface 17m multus Add eth0 [10.217.0.64/23] from openshift-sdn
Warning Failed 16m kubelet Failed to pull image "mysql@sha256:e9c9e3680bbadd5230a62c5548793bd8e59cbcc868032781e48bd53e888bd82f": rpc error: code = Unknown desc = reading blob sha256:5d726bac08eac44e8c39b1afbe20d14e2288e6846dd17299ae5725de86124bc7: Get "https://registry-1.docker.io/v2/library/mysql/blobs/sha256:5d726bac08eac44e8c39b1afbe20d14e2288e6846dd17299ae5725de86124bc7": net/http: TLS handshake timeout
Warning Failed 16m kubelet Error: ErrImagePull
Normal BackOff 16m kubelet Back-off pulling image "mysql@sha256:e9c9e3680bbadd5230a62c5548793bd8e59cbcc868032781e48bd53e888bd82f"
Warning Failed 16m kubelet Error: ImagePullBackOff
Normal Pulling 15m (x2 over 17m) kubelet Pulling image "mysql@sha256:e9c9e3680bbadd5230a62c5548793bd8e59cbcc868032781e48bd53e888bd82f"
Normal Pulled 14m kubelet Successfully pulled image "mysql@sha256:e9c9e3680bbadd5230a62c5548793bd8e59cbcc868032781e48bd53e888bd82f" in 1m17.121697748s
Normal Created 14m kubelet Created container mysql-openshift
Normal Started 14m kubelet Started container mysql-openshift
pradeep@learnOpenShift$ oc projects
You have access to the following projects and can switch between them with ' project <projectname>':
* mysql
pradeep-os-demo
Using project "mysql" on server "https://api.crc.testing:6443".
Let us go back to our mysql application and expose it, to create a route.
pradeep@learnOpenShift$ oc expose service/mysql-openshift
route.route.openshift.io/mysql-openshift exposed
pradeep@learnOpenShift$ oc get all
NAME READY STATUS RESTARTS AGE
pod/mysql-openshift-f5b68568f-shwz7 1/1 Running 0 20m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/mysql-openshift ClusterIP 10.217.4.70 <none> 3306/TCP,33060/TCP 20m
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/mysql-openshift 1/1 1 1 20m
NAME DESIRED CURRENT READY AGE
replicaset.apps/mysql-openshift-68996c4c8c 0 0 0 20m
replicaset.apps/mysql-openshift-f5b68568f 1 1 1 20m
NAME IMAGE REPOSITORY TAGS UPDATED
imagestream.image.openshift.io/mysql-openshift default-route-openshift-image-registry.apps-crc.testing/mysql/mysql-openshift latest 20 minutes ago
NAME HOST/PORT PATH SERVICES PORT TERMINATION WILDCARD
route.route.openshift.io/mysql-openshift mysql-openshift-mysql.apps-crc.testing mysql-openshift 3306-tcp None
Click on Open URL
OpenShift Building Blocks
A project is a Kubernetes namespace that contains all resources running in the OpenShift application.
pradeep@learnOpenShift$ oc config get-contexts
CURRENT NAME CLUSTER AUTHINFO NAMESPACE
/api-crc-testing:6443/developer api-crc-testing:6443 developer/api-crc-testing:6443
crc-admin api-crc-testing:6443 kubeadmin default
crc-developer api-crc-testing:6443 developer default
k8s k8s k8s default
* mysql/api-crc-testing:6443/developer api-crc-testing:6443 developer/api-crc-testing:6443 mysql
pradeep k8s pradeep
pradeep-os-demo/api-crc-testing:6443/developer api-crc-testing:6443 developer/api-crc-testing:6443 pradeep-os-demo
pradeep@learnOpenShift$ oc get pods --show-labels
NAME READY STATUS RESTARTS AGE LABELS
mysql-openshift-f5b68568f-shwz7 1/1 Running 0 32m deployment=mysql-openshift,pod-template-hash=f5b68568f
pradeep@learnOpenShift$ oc describe rs mysql-openshift-f5b68568f
Name: mysql-openshift-f5b68568f
Namespace: mysql
Selector: deployment=mysql-openshift,pod-template-hash=f5b68568f
Labels: deployment=mysql-openshift
pod-template-hash=f5b68568f
Annotations: deployment.kubernetes.io/desired-replicas: 1
deployment.kubernetes.io/max-replicas: 2
deployment.kubernetes.io/revision: 2
image.openshift.io/triggers:
[{"from":{"kind":"ImageStreamTag","name":"mysql-openshift:latest"},"fieldPath":"spec.template.spec.containers[?(@.name==\"mysql-openshift\...
openshift.io/generated-by: OpenShiftNewApp
Controlled By: Deployment/mysql-openshift
Replicas: 1 current / 1 desired
Pods Status: 1 Running / 0 Waiting / 0 Succeeded / 0 Failed
Pod Template:
Labels: deployment=mysql-openshift
pod-template-hash=f5b68568f
Annotations: openshift.io/generated-by: OpenShiftNewApp
Containers:
mysql-openshift:
Image: mysql@sha256:e9c9e3680bbadd5230a62c5548793bd8e59cbcc868032781e48bd53e888bd82f
Ports: 3306/TCP, 33060/TCP
Host Ports: 0/TCP, 0/TCP
Environment:
MYSQL_DATABASE: mydb
MYSQL_PASSWORD: password
MYSQL_ROOT_PASSWORD: password
MYSQL_USER: myuser
Mounts:
/var/lib/mysql from mysql-openshift-volume-1 (rw)
Volumes:
mysql-openshift-volume-1:
Type: EmptyDir (a temporary directory that shares a pod's lifetime)
Medium:
SizeLimit: <unset>
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal SuccessfulCreate 33m replicaset-controller Created pod: mysql-openshift-f5b68568f-shwz7
pradeep@learnOpenShift$ oc get all --selector deployment=mysql-openshift
NAME READY STATUS RESTARTS AGE
pod/mysql-openshift-f5b68568f-shwz7 1/1 Running 0 35m
NAME DESIRED CURRENT READY AGE
replicaset.apps/mysql-openshift-68996c4c8c 0 0 0 35m
replicaset.apps/mysql-openshift-f5b68568f 1 1 1 35m
pradeep@learnOpenShift$ oc explain pods
KIND: Pod
VERSION: v1
DESCRIPTION:
Pod is a collection of containers that can run on a host. This resource is
created by clients and scheduled onto hosts.
FIELDS:
apiVersion <string>
APIVersion defines the versioned schema of this representation of an
object. Servers should convert recognized schemas to the latest internal
value, and may reject unrecognized values. More info:
https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#resources
kind <string>
Kind is a string value representing the REST resource this object
represents. Servers may infer this from the endpoint the client submits
requests to. Cannot be updated. In CamelCase. More info:
https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#types-kinds
metadata <Object>
Standard object's metadata. More info:
https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#metadata
spec <Object>
Specification of the desired behavior of the pod. More info:
https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#spec-and-status
status <Object>
Most recently observed status of the pod. This data may not be up to date.
Populated by the system. Read-only. More info:
https://git.k8s.io/community/contributors/devel/sig-architecture/api-conventions.md#spec-and-status
Creating a Pod from YAML files
pradeep@learnOpenShift$ oc run bnginx --image=bitnami/nginx --dry-run=client -o yaml > bnginx.yaml
pradeep@learnOpenShift$ cat bnginx.yaml
apiVersion: v1
kind: Pod
metadata:
creationTimestamp: null
labels:
run: bnginx
name: bnginx
spec:
containers:
- image: bitnami/nginx
name: bnginx
resources: {}
dnsPolicy: ClusterFirst
restartPolicy: Always
status: {}
pradeep@learnOpenShift$ oc create -f bnginx.yaml
pod/bnginx created
pradeep@learnOpenShift$ oc get all
NAME READY STATUS RESTARTS AGE
pod/bnginx 1/1 Running 0 79s
pod/mysql-openshift-f5b68568f-shwz7 1/1 Running 0 40m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/mysql-openshift ClusterIP 10.217.4.70 <none> 3306/TCP,33060/TCP 40m
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/mysql-openshift 1/1 1 1 40m
NAME DESIRED CURRENT READY AGE
replicaset.apps/mysql-openshift-68996c4c8c 0 0 0 40m
replicaset.apps/mysql-openshift-f5b68568f 1 1 1 40m
NAME IMAGE REPOSITORY TAGS UPDATED
imagestream.image.openshift.io/mysql-openshift default-route-openshift-image-registry.apps-crc.testing/mysql/mysql-openshift latest 40 minutes ago
NAME HOST/PORT PATH SERVICES PORT TERMINATION WILDCARD
route.route.openshift.io/mysql-openshift mysql-openshift-mysql.apps-crc.testing mysql-openshift 3306-tcp None
pradeep@learnOpenShift$ oc -it exec bnginx -- sh
$ uname -a
Linux bnginx 4.18.0-305.30.1.el8_4.x86_64 #1 SMP Tue Nov 30 13:13:11 EST 2021 x86_64 GNU/Linux
$ exit 0
Using Source-to-Image to Create Applications
To create an Image, a Dockerfile could be used. Source 2 Image (S2I) takes application source code from a source control repository (such as Git) and builds a base container based on that to run the application. Also while doing so, the image is pushed to the OpenShift registry.
Images and Image Streams
An Image is a runtime template that contains all data that is needed to run a container
An Image Stream is a collection of different versions that exist of an image
Builder Image provide specific programming language information that is required to create an application
Please note is is a short name for image stream.
pradeep@learnOpenShift$ oc get is -n openshift
NAME IMAGE REPOSITORY TAGS UPDATED
apicast-gateway default-route-openshift-image-registry.apps-crc.testing/openshift/apicast-gateway 2.1.0.GA,2.10.0.GA,2.2.0.GA,2.3.0.GA + 7 more... 6 weeks ago
apicurito-ui default-route-openshift-image-registry.apps-crc.testing/openshift/apicurito-ui 1.2,1.3,1.4,1.5,1.6,1.7,1.8 6 weeks ago
cli default-route-openshift-image-registry.apps-crc.testing/openshift/cli latest 6 weeks ago
cli-artifacts default-route-openshift-image-registry.apps-crc.testing/openshift/cli-artifacts latest 6 weeks ago
dotnet default-route-openshift-image-registry.apps-crc.testing/openshift/dotnet 2.1,2.1-el7,2.1-ubi8,3.1,3.1-el7 + 4 more... 6 weeks ago
dotnet-runtime default-route-openshift-image-registry.apps-crc.testing/openshift/dotnet-runtime 2.1,2.1-el7,2.1-ubi8,3.1,3.1-el7 + 4 more... 6 weeks ago
driver-toolkit default-route-openshift-image-registry.apps-crc.testing/openshift/driver-toolkit 49.84.202112162103-0,latest 6 weeks ago
eap-cd-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/eap-cd-openshift 12,12.0,13,13.0,14,14.0,15,15.0,16,16.0 + 9 more... 6 weeks ago
eap-cd-runtime-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/eap-cd-runtime-openshift 18,18.0,19,19.0,20,20.0,latest 6 weeks ago
fis-java-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/fis-java-openshift 1.0,2.0 6 weeks ago
fis-karaf-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/fis-karaf-openshift 1.0,2.0 6 weeks ago
fuse-apicurito-generator default-route-openshift-image-registry.apps-crc.testing/openshift/fuse-apicurito-generator 1.2,1.3,1.4,1.5,1.6,1.7,1.8 6 weeks ago
fuse7-console default-route-openshift-image-registry.apps-crc.testing/openshift/fuse7-console 1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8 6 weeks ago
fuse7-eap-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/fuse7-eap-openshift 1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8 6 weeks ago
fuse7-java-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/fuse7-java-openshift 1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8 6 weeks ago
fuse7-karaf-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/fuse7-karaf-openshift 1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8 6 weeks ago
golang default-route-openshift-image-registry.apps-crc.testing/openshift/golang 1.13.4-ubi7,1.14.7-ubi8,latest 6 weeks ago
httpd default-route-openshift-image-registry.apps-crc.testing/openshift/httpd 2.4,2.4-el7,2.4-el8,latest 6 weeks ago
installer default-route-openshift-image-registry.apps-crc.testing/openshift/installer latest 6 weeks ago
installer-artifacts default-route-openshift-image-registry.apps-crc.testing/openshift/installer-artifacts latest 6 weeks ago
java default-route-openshift-image-registry.apps-crc.testing/openshift/java 11,8,latest,openjdk-11-el7,openjdk-11-ubi8 + 2 more... 6 weeks ago
jboss-amq-62 default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-amq-62 1.1,1.2,1.3,1.4,1.5,1.6,1.7 6 weeks ago
jboss-amq-63 default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-amq-63 1.0,1.1,1.2,1.3,1.4 6 weeks ago
jboss-datagrid65-client-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-datagrid65-client-openshift 1.0,1.1 6 weeks ago
jboss-datagrid65-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-datagrid65-openshift 1.2,1.3,1.4,1.5,1.6 6 weeks ago
jboss-datagrid71-client-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-datagrid71-client-openshift 1.0 6 weeks ago
jboss-datagrid71-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-datagrid71-openshift 1.0,1.1,1.2,1.3 6 weeks ago
jboss-datagrid72-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-datagrid72-openshift 1.0,1.1,1.2 6 weeks ago
jboss-datagrid73-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-datagrid73-openshift 1.0,1.1,1.2,1.3,1.4 6 weeks ago
jboss-datavirt64-driver-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-datavirt64-driver-openshift 1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7 6 weeks ago
jboss-datavirt64-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-datavirt64-openshift 1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7 6 weeks ago
jboss-decisionserver64-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-decisionserver64-openshift 1.0,1.1,1.2,1.3,1.4,1.5,1.6 6 weeks ago
jboss-eap64-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-eap64-openshift 1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8,1.9 + 1 more... 6 weeks ago
jboss-eap70-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-eap70-openshift 1.3,1.4,1.5,1.6,1.7 6 weeks ago
jboss-eap71-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-eap71-openshift 1.1,1.2,1.3,1.4,latest 6 weeks ago
jboss-eap72-openjdk11-openshift-rhel8 default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-eap72-openjdk11-openshift-rhel8 1.0,1.1,latest 6 weeks ago
jboss-eap72-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-eap72-openshift 1.0,1.1,1.2,latest 6 weeks ago
jboss-eap73-openjdk11-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-eap73-openjdk11-openshift 7.3,7.3.0,latest 6 weeks ago
jboss-eap73-openjdk11-runtime-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-eap73-openjdk11-runtime-openshift 7.3,7.3.0,latest 6 weeks ago
jboss-eap73-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-eap73-openshift 7.3,7.3.0,latest 6 weeks ago
jboss-eap73-runtime-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-eap73-runtime-openshift 7.3,7.3.0,latest 6 weeks ago
jboss-eap74-openjdk11-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-eap74-openjdk11-openshift 7.4.0,latest 6 weeks ago
jboss-eap74-openjdk11-runtime-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-eap74-openjdk11-runtime-openshift 7.4.0,latest 6 weeks ago
jboss-eap74-openjdk8-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-eap74-openjdk8-openshift 7.4.0,latest 6 weeks ago
jboss-eap74-openjdk8-runtime-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-eap74-openjdk8-runtime-openshift 7.4.0,latest 6 weeks ago
jboss-fuse70-console default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-fuse70-console 1.0 6 weeks ago
jboss-fuse70-eap-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-fuse70-eap-openshift 1.0 6 weeks ago
jboss-fuse70-java-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-fuse70-java-openshift 1.0 6 weeks ago
jboss-fuse70-karaf-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-fuse70-karaf-openshift 1.0 6 weeks ago
jboss-processserver64-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-processserver64-openshift 1.0,1.1,1.2,1.3,1.4,1.5,1.6 6 weeks ago
jboss-webserver31-tomcat7-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-webserver31-tomcat7-openshift 1.0,1.1,1.2,1.3,1.4 6 weeks ago
jboss-webserver31-tomcat8-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-webserver31-tomcat8-openshift 1.0,1.1,1.2,1.3,1.4 6 weeks ago
jboss-webserver54-openjdk11-tomcat9-openshift-rhel7 default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-webserver54-openjdk11-tomcat9-openshift-rhel7 1.0,latest 6 weeks ago
jboss-webserver54-openjdk11-tomcat9-openshift-ubi8 default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-webserver54-openjdk11-tomcat9-openshift-ubi8 1.0,latest 6 weeks ago
jboss-webserver54-openjdk8-tomcat9-openshift-rhel7 default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-webserver54-openjdk8-tomcat9-openshift-rhel7 1.0,latest 6 weeks ago
jboss-webserver54-openjdk8-tomcat9-openshift-ubi8 default-route-openshift-image-registry.apps-crc.testing/openshift/jboss-webserver54-openjdk8-tomcat9-openshift-ubi8 1.0,latest 6 weeks ago
jenkins default-route-openshift-image-registry.apps-crc.testing/openshift/jenkins 2,latest 6 weeks ago
jenkins-agent-base default-route-openshift-image-registry.apps-crc.testing/openshift/jenkins-agent-base latest 6 weeks ago
jenkins-agent-maven default-route-openshift-image-registry.apps-crc.testing/openshift/jenkins-agent-maven latest,v4.0 6 weeks ago
jenkins-agent-nodejs default-route-openshift-image-registry.apps-crc.testing/openshift/jenkins-agent-nodejs latest,v4.0 6 weeks ago
mariadb default-route-openshift-image-registry.apps-crc.testing/openshift/mariadb 10.3,10.3-el7,10.3-el8,10.5-el7 + 2 more... 6 weeks ago
must-gather default-route-openshift-image-registry.apps-crc.testing/openshift/must-gather latest 6 weeks ago
mysql default-route-openshift-image-registry.apps-crc.testing/openshift/mysql 8.0,8.0-el7,8.0-el8,latest 6 weeks ago
nginx default-route-openshift-image-registry.apps-crc.testing/openshift/nginx 1.16,1.16-el7,1.16-el8,1.18-ubi7 + 2 more... 6 weeks ago
nodejs default-route-openshift-image-registry.apps-crc.testing/openshift/nodejs 12,12-ubi7,12-ubi8,14-ubi7,14-ubi8 + 2 more... 6 weeks ago
oauth-proxy default-route-openshift-image-registry.apps-crc.testing/openshift/oauth-proxy v4.4 6 weeks ago
openjdk-11-rhel7 default-route-openshift-image-registry.apps-crc.testing/openshift/openjdk-11-rhel7 1.0,1.1 6 weeks ago
openjdk-11-rhel8 default-route-openshift-image-registry.apps-crc.testing/openshift/openjdk-11-rhel8 1.0 6 weeks ago
perl default-route-openshift-image-registry.apps-crc.testing/openshift/perl 5.26-ubi8,5.30,5.30-el7,5.30-ubi8 + 1 more... 6 weeks ago
php default-route-openshift-image-registry.apps-crc.testing/openshift/php 7.3,7.3-ubi7,7.3-ubi8,7.4-ubi8,latest 6 weeks ago
postgresql default-route-openshift-image-registry.apps-crc.testing/openshift/postgresql 10,10-el7,10-el8,12,12-el7,12-el8 + 4 more... 6 weeks ago
python default-route-openshift-image-registry.apps-crc.testing/openshift/python 2.7,2.7-ubi7,2.7-ubi8,3.6-ubi8,3.8 + 4 more... 6 weeks ago
redhat-openjdk18-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/redhat-openjdk18-openshift 1.0,1.1,1.2,1.3,1.4,1.5,1.6,1.7,1.8 6 weeks ago
redhat-sso70-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/redhat-sso70-openshift 1.3,1.4 6 weeks ago
redhat-sso71-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/redhat-sso71-openshift 1.0,1.1,1.2,1.3 6 weeks ago
redhat-sso72-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/redhat-sso72-openshift 1.0,1.1,1.2,1.3,1.4 6 weeks ago
redhat-sso73-openshift default-route-openshift-image-registry.apps-crc.testing/openshift/redhat-sso73-openshift 1.0,latest 6 weeks ago
redis default-route-openshift-image-registry.apps-crc.testing/openshift/redis 5,5-el7,5-el8,latest 6 weeks ago
rhdm-decisioncentral-rhel8 default-route-openshift-image-registry.apps-crc.testing/openshift/rhdm-decisioncentral-rhel8 7.11.0 6 weeks ago
rhdm-kieserver-rhel8 default-route-openshift-image-registry.apps-crc.testing/openshift/rhdm-kieserver-rhel8 7.11.0 6 weeks ago
rhpam-businesscentral-monitoring-rhel8 default-route-openshift-image-registry.apps-crc.testing/openshift/rhpam-businesscentral-monitoring-rhel8 7.11.0 6 weeks ago
rhpam-businesscentral-rhel8 default-route-openshift-image-registry.apps-crc.testing/openshift/rhpam-businesscentral-rhel8 7.11.0 6 weeks ago
rhpam-kieserver-rhel8 default-route-openshift-image-registry.apps-crc.testing/openshift/rhpam-kieserver-rhel8 7.11.0 6 weeks ago
rhpam-smartrouter-rhel8 default-route-openshift-image-registry.apps-crc.testing/openshift/rhpam-smartrouter-rhel8 7.11.0 6 weeks ago
ruby default-route-openshift-image-registry.apps-crc.testing/openshift/ruby 2.5-ubi8,2.6,2.6-ubi7,2.6-ubi8,2.7 + 4 more... 6 weeks ago
sso74-openshift-rhel8 default-route-openshift-image-registry.apps-crc.testing/openshift/sso74-openshift-rhel8 7.4,latest 6 weeks ago
tests default-route-openshift-image-registry.apps-crc.testing/openshift/tests latest 6 weeks ago
tools default-route-openshift-image-registry.apps-crc.testing/openshift/tools latest 6 weeks ago
ubi8-openjdk-11 default-route-openshift-image-registry.apps-crc.testing/openshift/ubi8-openjdk-11 1.3 6 weeks ago
ubi8-openjdk-8 default-route-openshift-image-registry.apps-crc.testing/openshift/ubi8-openjdk-8 1.3 6 weeks ag
The resulting custom runtime image is used to run your own application Custom images are stored in the OpenShift internal registry, and are accessible from the current project
pradeep@learnOpenShift$ oc -o yaml new-app php~https://github.com/pradeepgadde/simple-openshift-app --name=simple1 >
s2i.yaml
pradeep@learnOpenShift$ cat s2i.yaml
apiVersion: v1
items:
- apiVersion: image.openshift.io/v1
kind: ImageStream
metadata:
annotations:
openshift.io/generated-by: OpenShiftNewApp
creationTimestamp: null
labels:
app: simple1
app.kubernetes.io/component: simple1
app.kubernetes.io/instance: simple1
name: simple1
spec:
lookupPolicy:
local: false
status:
dockerImageRepository: ""
- apiVersion: build.openshift.io/v1
kind: BuildConfig
metadata:
annotations:
openshift.io/generated-by: OpenShiftNewApp
creationTimestamp: null
labels:
app: simple1
app.kubernetes.io/component: simple1
app.kubernetes.io/instance: simple1
name: simple1
spec:
nodeSelector: null
output:
to:
kind: ImageStreamTag
name: simple1:latest
postCommit: {}
resources: {}
source:
git:
uri: https://github.com/pradeepgadde/simple-openshift-app
type: Git
strategy:
sourceStrategy:
from:
kind: ImageStreamTag
name: php:7.4-ubi8
namespace: openshift
type: Source
triggers:
- github:
secret: 2eqGHBsvG0TW29dPD4xB
type: GitHub
- generic:
secret: GIZUWKlkGO4IDlvLLQP_
type: Generic
- type: ConfigChange
- imageChange: {}
type: ImageChange
status:
lastVersion: 0
- apiVersion: apps/v1
kind: Deployment
metadata:
annotations:
image.openshift.io/triggers: '[{"from":{"kind":"ImageStreamTag","name":"simple1:latest"},"fieldPath":"spec.template.spec.containers[?(@.name==\"simple1\")].image"}]'
openshift.io/generated-by: OpenShiftNewApp
creationTimestamp: null
labels:
app: simple1
app.kubernetes.io/component: simple1
app.kubernetes.io/instance: simple1
name: simple1
spec:
replicas: 1
selector:
matchLabels:
deployment: simple1
strategy: {}
template:
metadata:
annotations:
openshift.io/generated-by: OpenShiftNewApp
creationTimestamp: null
labels:
deployment: simple1
spec:
containers:
- image: ' '
name: simple1
ports:
- containerPort: 8080
protocol: TCP
- containerPort: 8443
protocol: TCP
resources: {}
status: {}
- apiVersion: v1
kind: Service
metadata:
annotations:
openshift.io/generated-by: OpenShiftNewApp
creationTimestamp: null
labels:
app: simple1
app.kubernetes.io/component: simple1
app.kubernetes.io/instance: simple1
name: simple1
spec:
ports:
- name: 8080-tcp
port: 8080
protocol: TCP
targetPort: 8080
- name: 8443-tcp
port: 8443
protocol: TCP
targetPort: 8443
selector:
deployment: simple1
status:
loadBalancer: {}
kind: List
metadata: {}
pradeep@learnOpenShift$ oc apply -f s2i.yaml
imagestream.image.openshift.io/simple1 created
buildconfig.build.openshift.io/simple1 created
deployment.apps/simple1 created
service/simple1 created
pradeep@learnOpenShift$ oc status
In project mysql on server https://api.crc.testing:6443
http://mysql-openshift-mysql.apps-crc.testing to pod port 3306-tcp (svc/mysql-openshift)
deployment/mysql-openshift deploys istag/mysql-openshift:latest
deployment #2 running for about an hour - 1 pod
deployment #1 deployed about an hour ago
svc/simple1 - 10.217.5.217 ports 8080, 8443
deployment/simple1 deploys istag/simple1:latest <-
bc/simple1 source builds https://github.com/pradeepgadde/simple-openshift-app on openshift/php:7.4-ubi8
build #1 running for 51 seconds - 7695b44: Getting Started with OpenShift by sandervanvugt (Pradeep Gadde <63095349+pradeepgadde@users.noreply.github.com>)
deployment #1 running for 53 seconds - 0/1 pods growing to 1
pod/bnginx runs bitnami/nginx
2 infos identified, use 'oc status --suggest' to see details.
pradeep@learnOpenShift$ oc get builds
NAME TYPE FROM STATUS STARTED DURATION
simple1-1 Source Git@7695b44 Running 2 minutes ago
pradeep@learnOpenShift$ oc get pods
NAME READY STATUS RESTARTS AGE
bnginx 1/1 Running 0 33m
mysql-openshift-f5b68568f-shwz7 1/1 Running 0 73m
simple1-1-build 1/1 Running 0 2m41s
pradeep@learnOpenShift$ oc get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
bnginx 1/1 Running 0 33m 10.217.0.83 crc-xxcfw-master-0 <none> <none>
mysql-openshift-f5b68568f-shwz7 1/1 Running 0 73m 10.217.0.64 crc-xxcfw-master-0 <none> <none>
simple1-1-build 1/1 Running 0 2m48s 10.217.0.98 crc-xxcfw-master-0 <none> <none>
pradeep@learnOpenShift$ oc get deploy
NAME READY UP-TO-DATE AVAILABLE AGE
mysql-openshift 1/1 1 1 74m
simple1 0/1 0 0 3m52s
pradeep@learnOpenShift$ oc get all
NAME READY STATUS RESTARTS AGE
pod/bnginx 1/1 Running 0 36m
pod/mysql-openshift-f5b68568f-shwz7 1/1 Running 0 75m
pod/simple1-1-build 1/1 Running 0 5m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/mysql-openshift ClusterIP 10.217.4.70 <none> 3306/TCP,33060/TCP 75m
service/simple1 ClusterIP 10.217.5.217 <none> 8080/TCP,8443/TCP 5m2s
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/mysql-openshift 1/1 1 1 75m
deployment.apps/simple1 0/1 0 0 5m3s
NAME DESIRED CURRENT READY AGE
replicaset.apps/mysql-openshift-68996c4c8c 0 0 0 75m
replicaset.apps/mysql-openshift-f5b68568f 1 1 1 75m
replicaset.apps/simple1-59c9b6d884 1 0 0 5m3s
NAME TYPE FROM LATEST
buildconfig.build.openshift.io/simple1 Source Git 1
NAME TYPE FROM STATUS STARTED DURATION
build.build.openshift.io/simple1-1 Source Git@7695b44 Running 5 minutes ago
NAME IMAGE REPOSITORY TAGS UPDATED
imagestream.image.openshift.io/mysql-openshift default-route-openshift-image-registry.apps-crc.testing/mysql/mysql-openshift latest About an hour ago
imagestream.image.openshift.io/simple1 default-route-openshift-image-registry.apps-crc.testing/mysql/simple1
NAME HOST/PORT PATH SERVICES PORT TERMINATION WILDCARD
route.route.openshift.io/mysql-openshift mysql-openshift-mysql.apps-crc.testing mysql-openshift 3306-tcp None
pradeep@learnOpenShift$ oc describe build simple1-1
Name: simple1-1
Namespace: mysql
Created: 6 minutes ago
Labels: app=simple1
app.kubernetes.io/component=simple1
app.kubernetes.io/instance=simple1
buildconfig=simple1
openshift.io/build-config.name=simple1
openshift.io/build.start-policy=Serial
Annotations: openshift.io/build-config.name=simple1
openshift.io/build.number=1
openshift.io/build.pod-name=simple1-1-build
Status: Complete
Started: Wed, 23 Feb 2022 10:47:46 IST
Duration: 5m44s
FetchInputs: 2s
PullImages: 4m50s
Build: 20s
PushImage: 6s
Build Config: simple1
Build Pod: simple1-1-build
Image Digest: sha256:953bec8b4ee57661ae61df0ab8ff7d1ad568d3dead2a1f0f785d1e2cd25c71e0
Strategy: Source
URL: https://github.com/pradeepgadde/simple-openshift-app
Commit: 7695b44 (Getting Started with OpenShift by sandervanvugt)
Author/Committer: Pradeep Gadde / GitHub
From Image: DockerImage image-registry.openshift-image-registry.svc:5000/openshift/php@sha256:34f2d80adac5a8aeb65c045e3a8c1caea56d53704d8d5cddec588c9008ceb5ea
Pull Secret Name: builder-dockercfg-n8v7b
Volumes: <none>
Output to: ImageStreamTag simple1:latest
Push Secret: builder-dockercfg-n8v7b
Build trigger cause: Image change
Image ID: image-registry.openshift-image-registry.svc:5000/openshift/php@sha256:34f2d80adac5a8aeb65c045e3a8c1caea56d53704d8d5cddec588c9008ceb5ea
Image Name/Kind: php:7.4-ubi8 / ImageStreamTag
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 6m33s default-scheduler Successfully assigned mysql/simple1-1-build to crc-xxcfw-master-0
Normal AddedInterface 6m28s multus Add eth0 [10.217.0.98/23] from openshift-sdn
Normal Pulled 6m27s kubelet Container image "quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:961b30e0ab62cf04d000c1eb8330e62ff2daf4545ee094d3c9acd4c443e3c5d2" already present on machine
Normal Created 6m27s kubelet Created container git-clone
Normal Started 6m26s kubelet Started container git-clone
Normal BuildStarted 6m26s build-controller Build mysql/simple1-1 is now running
Normal Pulled 6m22s kubelet Container image "quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:961b30e0ab62cf04d000c1eb8330e62ff2daf4545ee094d3c9acd4c443e3c5d2" already present on machine
Normal Created 6m13s kubelet Created container manage-dockerfile
Normal Started 6m9s kubelet Started container manage-dockerfile
Normal Pulled 6m8s kubelet Container image "quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:961b30e0ab62cf04d000c1eb8330e62ff2daf4545ee094d3c9acd4c443e3c5d2" already present on machine
Normal Created 6m8s kubelet Created container sti-build
Normal Started 6m7s kubelet Started container sti-build
Normal BuildCompleted 48s build-controller Build mysql/simple1-1 completed successfully
Warning FailedMount 47s (x3 over 49s) kubelet MountVolume.SetUp failed for volume "build-proxy-ca-bundles" : object "mysql"/"simple1-1-global-ca" not registered
Warning FailedMount 47s (x3 over 49s) kubelet MountVolume.SetUp failed for volume "build-system-configs" : object "mysql"/"simple1-1-sys-config" not registered
Warning FailedMount 47s (x3 over 49s) kubelet MountVolume.SetUp failed for volume "build-ca-bundles" : object "mysql"/"simple1-1-ca" not registered
Warning FailedMount 47s (x3 over 49s) kubelet MountVolume.SetUp failed for volume "builder-dockercfg-n8v7b-pull" : object "mysql"/"builder-dockercfg-n8v7b" not registered
Warning FailedMount 47s (x3 over 49s) kubelet MountVolume.SetUp failed for volume "builder-dockercfg-n8v7b-push" : object "mysql"/"builder-dockercfg-n8v7b" not registered
pradeep@learnOpenShift$ oc explain buildconfig.spec.triggers
KIND: BuildConfig
VERSION: build.openshift.io/v1
RESOURCE: triggers <[]Object>
DESCRIPTION:
triggers determine how new Builds can be launched from a BuildConfig. If no
triggers are defined, a new build can only occur as a result of an explicit
client build creation.
BuildTriggerPolicy describes a policy for a single trigger that results in
a new Build.
FIELDS:
bitbucket <Object>
BitbucketWebHook contains the parameters for a Bitbucket webhook type of
trigger
generic <Object>
generic contains the parameters for a Generic webhook type of trigger
github <Object>
github contains the parameters for a GitHub webhook type of trigger
gitlab <Object>
GitLabWebHook contains the parameters for a GitLab webhook type of trigger
imageChange <Object>
imageChange contains parameters for an ImageChange type of trigger
type <string> -required-
type is the type of build trigger. Valid values:
- GitHub GitHubWebHookBuildTriggerType represents a trigger that launches
builds on GitHub webhook invocations
- Generic GenericWebHookBuildTriggerType represents a trigger that launches
builds on generic webhook invocations
- GitLab GitLabWebHookBuildTriggerType represents a trigger that launches
builds on GitLab webhook invocations
- Bitbucket BitbucketWebHookBuildTriggerType represents a trigger that
launches builds on Bitbucket webhook invocations
- ImageChange ImageChangeBuildTriggerType represents a trigger that
launches builds on availability of a new version of an image
- ConfigChange ConfigChangeBuildTriggerType will trigger a build on an
initial build config creation WARNING: In the future the behavior will
change to trigger a build on any config change
Let us switch to the web console and look at the mysql project and applications running currently inside it.
pradeep@learnOpenShift$ oc expose service simple1
route.route.openshift.io/simple1 exposed
pradeep@learnOpenShift$ oc get all
NAME READY STATUS RESTARTS AGE
pod/bnginx 1/1 Running 2 88m
pod/mysql-openshift-f5b68568f-shwz7 1/1 Running 2 127m
pod/simple1-1-build 0/1 Completed 0 57m
pod/simple1-7678fbccc9-dnzbd 1/1 Running 2 51m
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/mysql-openshift ClusterIP 10.217.4.70 <none> 3306/TCP,33060/TCP 127m
service/simple1 ClusterIP 10.217.5.217 <none> 8080/TCP,8443/TCP 57m
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/mysql-openshift 1/1 1 1 127m
deployment.apps/simple1 1/1 1 1 57m
NAME DESIRED CURRENT READY AGE
replicaset.apps/mysql-openshift-68996c4c8c 0 0 0 127m
replicaset.apps/mysql-openshift-f5b68568f 1 1 1 127m
replicaset.apps/simple1-59c9b6d884 0 0 0 57m
replicaset.apps/simple1-7678fbccc9 1 1 1 51m
NAME TYPE FROM LATEST
buildconfig.build.openshift.io/simple1 Source Git 1
NAME TYPE FROM STATUS STARTED DURATION
build.build.openshift.io/simple1-1 Source Git@7695b44 Complete 57 minutes ago 5m44s
NAME IMAGE REPOSITORY TAGS UPDATED
imagestream.image.openshift.io/mysql-openshift default-route-openshift-image-registry.apps-crc.testing/mysql/mysql-openshift latest 2 hours ago
imagestream.image.openshift.io/simple1 default-route-openshift-image-registry.apps-crc.testing/mysql/simple1 latest 51 minutes ago
NAME HOST/PORT PATH SERVICES PORT TERMINATION WILDCARD
route.route.openshift.io/mysql-openshift mysql-openshift-mysql.apps-crc.testing mysql-openshift 3306-tcp None
route.route.openshift.io/simple1 simple1-mysql.apps-crc.testing simple1 8080-tcp None
Manually Triggering Updates
Edit the index.php in the simple-app git repository. Remove the PHP Test info section and modify the body to show greetings in English!
Use oc start-build simple1 to trigger the build procedure again
pradeep@learnOpenShift$ oc start-build simple1
build.build.openshift.io/simple1-2 started
pradeep@learnOpenShift$ oc get build
NAME TYPE FROM STATUS STARTED DURATION
simple1-1 Source Git@7695b44 Complete About an hour ago 5m44s
simple1-2 Source Git@854c5cb Running 18 seconds ago
pradeep@learnOpenShift$ oc describe build simple1-2
Name: simple1-2
Namespace: mysql
Created: About a minute ago
Labels: app=simple1
app.kubernetes.io/component=simple1
app.kubernetes.io/instance=simple1
buildconfig=simple1
openshift.io/build-config.name=simple1
openshift.io/build.start-policy=Serial
Annotations: openshift.io/build-config.name=simple1
openshift.io/build.number=2
openshift.io/build.pod-name=simple1-2-build
Status: Complete
Started: Wed, 23 Feb 2022 11:57:06 IST
Duration: 1m39s
FetchInputs: 1s
PullImages: 1m18s
Build: 8s
PushImage: 1s
Build Config: simple1
Build Pod: simple1-2-build
Image Digest: sha256:d4cce6a7d47b33f3cb8d071c210829a71b24f8a2e3c263fc65fdd884eeebbacb
Strategy: Source
URL: https://github.com/pradeepgadde/simple-openshift-app
Commit: 854c5cb (To test manual trigger of OpenShift Build)
Author/Committer: Pradeep Gadde / GitHub
From Image: DockerImage image-registry.openshift-image-registry.svc:5000/openshift/php@sha256:34f2d80adac5a8aeb65c045e3a8c1caea56d53704d8d5cddec588c9008ceb5ea
Pull Secret Name: builder-dockercfg-n8v7b
Volumes: <none>
Output to: ImageStreamTag simple1:latest
Push Secret: builder-dockercfg-n8v7b
Build trigger cause: Manually triggered
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 113s default-scheduler Successfully assigned mysql/simple1-2-build to crc-xxcfw-master-0
Normal Started 111s kubelet Started container git-clone
Normal AddedInterface 111s multus Add eth0 [10.217.0.59/23] from openshift-sdn
Normal Pulled 111s kubelet Container image "quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:961b30e0ab62cf04d000c1eb8330e62ff2daf4545ee094d3c9acd4c443e3c5d2" already present on machine
Normal Created 111s kubelet Created container git-clone
Normal BuildStarted 110s build-controller Build mysql/simple1-2 is now running
Normal Created 108s kubelet Created container manage-dockerfile
Normal Pulled 108s kubelet Container image "quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:961b30e0ab62cf04d000c1eb8330e62ff2daf4545ee094d3c9acd4c443e3c5d2" already present on machine
Normal Started 107s kubelet Started container manage-dockerfile
Normal Pulled 106s kubelet Container image "quay.io/openshift-release-dev/ocp-v4.0-art-dev@sha256:961b30e0ab62cf04d000c1eb8330e62ff2daf4545ee094d3c9acd4c443e3c5d2" already present on machine
Normal Created 106s kubelet Created container sti-build
Normal Started 106s kubelet Started container sti-build
Normal BuildCompleted 15s build-controller Build mysql/simple1-2 completed successfully
Warning FailedMount 15s (x2 over 15s) kubelet MountVolume.SetUp failed for volume "build-ca-bundles" : object "mysql"/"simple1-2-ca" not registered
Warning FailedMount 15s (x2 over 15s) kubelet MountVolume.SetUp failed for volume "build-system-configs" : object "mysql"/"simple1-2-sys-config" not registered
Warning FailedMount 15s (x2 over 15s) kubelet MountVolume.SetUp failed for volume "build-proxy-ca-bundles" : object "mysql"/"simple1-2-global-ca" not registered
Warning FailedMount 15s (x2 over 15s) kubelet MountVolume.SetUp failed for volume "builder-dockercfg-n8v7b-push" : object "mysql"/"builder-dockercfg-n8v7b" not registered
Warning FailedMount 15s (x2 over 15s) kubelet MountVolume.SetUp failed for volume "builder-dockercfg-n8v7b-pull" : object "mysql"/"builder-dockercfg-n8v7b" not registere
pradeep@learnOpenShift$ oc get all
NAME READY STATUS RESTARTS AGE
pod/bnginx 1/1 Running 2 103m
pod/mysql-openshift-f5b68568f-shwz7 1/1 Running 2 143m
pod/simple1-1-build 0/1 Completed 0 72m
pod/simple1-2-build 0/1 Completed 0 3m32s
pod/simple1-56465c7f74-xp9m8 1/1 Running 0 115s
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
service/mysql-openshift ClusterIP 10.217.4.70 <none> 3306/TCP,33060/TCP 143m
service/simple1 ClusterIP 10.217.5.217 <none> 8080/TCP,8443/TCP 72m
NAME READY UP-TO-DATE AVAILABLE AGE
deployment.apps/mysql-openshift 1/1 1 1 143m
deployment.apps/simple1 1/1 1 1 72m
NAME DESIRED CURRENT READY AGE
replicaset.apps/mysql-openshift-68996c4c8c 0 0 0 143m
replicaset.apps/mysql-openshift-f5b68568f 1 1 1 143m
replicaset.apps/simple1-56465c7f74 1 1 1 115s
replicaset.apps/simple1-59c9b6d884 0 0 0 72m
replicaset.apps/simple1-7678fbccc9 0 0 0 67m
NAME TYPE FROM LATEST
buildconfig.build.openshift.io/simple1 Source Git 2
NAME TYPE FROM STATUS STARTED DURATION
build.build.openshift.io/simple1-1 Source Git@7695b44 Complete About an hour ago 5m44s
build.build.openshift.io/simple1-2 Source Git@854c5cb Complete 3 minutes ago 1m39s
NAME IMAGE REPOSITORY TAGS UPDATED
imagestream.image.openshift.io/mysql-openshift default-route-openshift-image-registry.apps-crc.testing/mysql/mysql-openshift latest 2 hours ago
imagestream.image.openshift.io/simple1 default-route-openshift-image-registry.apps-crc.testing/mysql/simple1 latest About a minute ago
NAME HOST/PORT PATH SERVICES PORT TERMINATION WILDCARD
route.route.openshift.io/mysql-openshift mysql-openshift-mysql.apps-crc.testing mysql-openshift 3306-tcp None
route.route.openshift.io/simple1 simple1-mysql.apps-crc.testing simple1 8080-tcp None
pradeep@learnOpenShift$ curl simple1-mysql.apps-crc.testing
<html>
<head>
<title>PHP Test</title>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1"/>
</head>
<body>
<h1>PHP Test</h1>
<p><b>An Example of PHP in Action</b></p>
The Current Date and Time is: <br />6:30 AM Wednesday, February 23 2022. </p>
<h2>Greetings from Pradeep Gadde!</h2>
</body>
</html>
These tests confirm the changes.
Understanding Routes
Routes are an alternative to Kubernetes Ingress
Routes are OpenShift resources that allow for network access to pods from users and applications outside the OpenShift instance
A route connects a public IP address and DNS name to the internal service IP address
OpenShift uses a HAProxy based shared router service to implement the route.
When exposing a service, the DNS name is auto-generated as routename-projectname-defaultDNSdomain
pradeep@learnOpenShift$ oc get route
NAME HOST/PORT PATH SERVICES PORT TERMINATION WILDCARD
mysql-openshift mysql-openshift-mysql.apps-crc.testing mysql-openshift 3306-tcp None
simple1 simple1-mysql.apps-crc.testing simple1 8080-tcp None
This completes my initial testing of RedHat OpenShift on CloudReady Container platform. There is one more major topic to basic tests that is storage, which I haven’t explored yet.
I will keep updating this post as I get a chance to test and learn.
Keep learning 
Best regards,
Pradeep
