Bootstrap

Getting Started with OpenShift

View node logs using the oc adm node-logs command

Getting Started with the Admin Console

Expire Alert Manager Silence using amtool

List Alert Manager Alerts using amtool

List Alert Manager Silenced Alerts using amtool

Silence Alert Manager Alerts using amtool

Annotate a resource using the oc annotate command

List API Request Counts using the oc get apirequestcounts command

Display API Server URL using the oc config view command

Display api URL using the oc get apiserver command

Get API Server Certificates using OpenSSL

Get API Server Certificates using the oc and OpenSSL commands

Log into OpenShift using a service account token

Log into OpenShift using a user account token

Log into OpenShift using Ansible community.okd.openshift_auth

Log into OpenShift using the oc login command

Add Update Remove Identity Providers

Create an oAuth LDAP Identity Provider

Create htpasswd OAuth Identity Provider

List identities using the oc get identity command

List the enabled authentication methods

Update htpasswd Identity Provider

Create an OpenID Connect Identity Provider with Red Hat Single Sign On (SSO)

List OAuth Bearer Token using REST API

List OAuth Identity Providers using the oc get oauth command

Obtain OAuth Bearer Token using REST API

List Build Configs using the oc get buildconfigs command

Migrate Application - Create the Migration Plan

Migrate Application - Migrate a Plan

Migrate Application - Stage a Plan

List Cluster Service Versions using the oc get csv command

crc cleanup command (CodeReady Containers version)

crc config command (CodeReady Containers)

crc delete command (CodeReady Containers)

crc setup command (CodeReady Containers)

crc start command (CodeReady Containers)

crc status command (CodeReady Containers)

crc stop command (CodeReady Containers)

crc version command (CodeReady Containers version)

crc.log (CodeReady Containers log)

Display CodeReady Container login credentials using the crc console command

Install OpenShift CodeReady Containers on Linux or Mac

Install OpenShift CodeReady Containers on Windows

Uninstall OpenShift CodeReady Containers on Linux

Uninstall OpenShift CodeReady Containers on Mac

Uninstall OpenShift CodeReady Containers on Windows

Delete Config Maps using the oc delete configmap command

Edit Config Map using the oc edit command

List Config Maps using REST API

List Config Maps using the oc get configmaps command

Mount multiple Config Maps to the same directory using projected volume

List the containers in a deployment or pod

Run a command in a container

List Contexts using the oc config get-context command

Copy file between container and host using the oc cp command

Create cronjob using the oc create cronjob command

List cron jobs using REST API

List cronjobs using the oc get cronjob command

List Jobs using the oc get jobs command

Manually run cronjob

Delete Custom Resource Definitions (CRD) using the oc delete crd command

List Custom Resource Definitions (CRD) using the oc get crd command

List daemon sets using REST API

List deamon sets using the oc get daemonsets command

Delete deployment using the oc delete deployment command

Deploy a new version of an application using the oc rollout command

Deploy an application from a build

Deploy an application from a JSON or YAML file

Deploy an application from a template

Deploy an application from an image

Deploy an application from Docker Hub

Deploy an application from GitHub

Deploy Hello Openshift

Deploy Python Flask container on OpenShift

Deployment status using the oc status command

Label a deployment using the oc label command

List deployment configs using the oc get deploymentconfigs command

List deployment environment variables

List deployments using REST API

List deployments using the oc get deployments command

Update a deployment YAML template file using the oc edit command

List DNS objects using the oc get dns command

List OpenShift DNS URLs

Assign egress IP address to a node using the oc patch hostsubnet command

Assign egress IP address to a project using the oc patch netnamespace command

Create egress network policy rules

Edit egress rules using the oc edit command

List egress IP and CIDR using the oc get hostsubnet command

List egress IP using the oc get netnamespace command

List egress rules using the oc get egressnetworkpolicy command

Delete Elastic Search indices

Determine Elastic Search health status (green yellow red)

Elastic Search same_shard the shard cannot be allocated to the same node on which a copy of the shard already exists

Elastic Search Shard Allocation

List Elastic Search Cluster Settings

List Elastic Search Documents

List Elastic Search Indices

List Elastic Search Shards

Monitor an Application Server in Elastic APM

Patch Elastic Search Management State

List endpoints using the oc get endpoints command

Create deployment environment variables

Delete environment variables using the oc set env command

List environment variables using the oc set env command

Delete events using the oc delete events command

List Events using the oc get events command

View Node events using oc describe or oc get

View Pod events using oc describe or oc get

Getting Started with Keycloak

Getting Started with Terraform

Install gitops-primer Operator on the command line

Install Red Hat OpenShift GitOps Operator using the console (Argo CD)

Create image using the oc import-image command

List image streams using the oc get imagestreams command

List images using the oc get images command

Pull image from a registry using the podman pull command

Create Ingress Route

Display ingress domain apps URL

List Ingress Controllers using the oc get ingresscontroller command

List Ingress Route using the oc get ingress command

List Ingress Routers using the oc get services command

Install 60 day free trial version of Red Hat OpenShift on VMWare

Parse JSON using jsonpath

Understanding Labels

Import Users and Groups using ldap-sync

Remove LDAP sync Groups using oc adm prune groups

Schedule LDAP sync using cronjob

Create Cluster Resource Quota

Create CPU Memory Limits

List Cluster Resource Quota using the oc get clusterresourcequota command

List CPU Memory Limits using the oc get limits command

List Quota using the oc get quota command

Update a deployment with CPU Memory resource requests and limits

Elastic Search logs (ELK EFK stack)

Filebeat logs (ELK EFK stack)

Fluentd log level (ELK EFK stack)

Fluentd logs (ELK EFK stack)

log level option (--loglevel)

Patch Cluster Logging Management State

View logs using the master-logs command

View logs using the oc logs command

Delete machine using the oc delete machine command

Label a node using the oc label command

List Machine Config Pool using the oc get machineconfigpool command

List machine sets using the oc get machineset command

List machines using the oc get machines command

List nodes using the oc get nodes command

Restart node using the oc debug node command

Start a node in debug mode using the oc debug command

Creating a Must Gather using the oc adm must-gather command

Allow or deny all egress traffic in a project using Network Policy

Allow or deny all ingress traffic in a project using Network Policy

Allow or deny all traffic based on IP address, CIDR or port using Network Policy

Allow requests that match pod label

Allow traffic from a namespace using Network Policy

List Network Policies using the oc get networkpolicies command

Getting Started with the oc command

List Cluster Operators using the oc get clusteroperator command

List Cluster Operators using the REST API

List Operators using the oc get operators command

custom-columns option

Run a pod on a specific node using nodeAffinity

Run a pod on a specific node using nodeSelector

Run a pod on a specific node using podAffinity

Run a pod on a specific node using taint and tolerations

Configure a pod to create heap dumps (oc edit JAVA_OPTS)

Create a pod using a YAML template file

Delete Pod using the oc delete pod command

Delete Pods using Ansible

Delete pods using REST API

Deploy a pod from a JSON or YAML file

Evicting pods from a node (oc adm drain)

Exchanging messages between pods

Execute a command in a pod using the oc exec command

Label a pod using the oc label command

List pods using Ansible

List pods using REST API

List pods using the oc get pods command

Remote shell to a pod using the oc rsh command

Restart Pod using the oc delete pod command

Restart Pod using the REST API

Update a pods max heap (oc edit JAVA_OPTS)

Update a pods metaspace (oc edit JAVA_OPTS)

View a pods memory usage (RAM)

Create a port forward rule using the oc port-forward command

Change Project using the oc project command

Create a Project using Terraform

Create Project Template using the oc adm create-bootstrap-project-template command

Delete project using REST API

Delete Project using the oc delete project command

Disable new Project creation by editing the self-provisioners Cluster Role Binding

Disable new Project creation using projectRequestMessage

Inspect a project using the oc adm inspect command

List Projects using Python

List projects using REST API

List projects using the oc get netnamespaces command

List projects using the oc get projects command

List projects using NodeJS

List Prometheus Metrics

List Prometheus Targets

Reload Prometheus Configurations

List proxy servers using the oc get proxy command

List repositories in the internal registry

Sign into registry.redhat.io using the podman login command

List replicas using REST API

List replicas using the oc get replicaset command

List replicaset environment variables

Create Replication Controller

List Replication Controllers

Controller replicaset and replication controller revisions using triggers

Add or Remove a Role Binding from a User Group or Service Account

Delete a Role Binding using REST API

List Role Bindings using Python

List Role Bindings using REST API

Update a Role Binding using REST API

Create Role using a YAML template file

Determine if a User or Group has permission using oc adm policy who-can

Understanding Default Router

Create insecured Route using the oc expose command

Create secured Route using Self Signed Certificate

Create secured Route using the oc create route command

Label a route using the oc label command

List Routes using the oc get routes command

Resolve route automatically recreating

Add machines nodes using the oc scale machineset command

Automatically scale a pod using Horizontal Pod Autoscaler

List autoscalers using the oc get horizontalpodautoscalers command

Temporarily change the number of pods (replicas) using the oc scale command

List Schedulers using the oc get scheduler command

Marking node as schedulable or unschedulable

Configure a Deployment with Secrets as a Variable

Configure a Deployment with Secrets as a Volume Mount

Create Opaque Generic Secrets (key value pairs)

Delete Secret using REST API

Deleting Secrets using the oc delete secret command

Display secret content using the oc secrets command

List Secrets using Python

List Secrets using REST API

List Secrets using the oc get secrets command

Prefix Secrets using oc set env --prefix

Update Secret using the oc replace command

Add a Security Context Constraint to a User or Group or Service Account

Create a Security Context Constraint

Delete a Security Context Constraint

List Security Context Constraints allowed by a pod or deployment

List Security Context Constraints using the oc get securitycontextconstraints command

Remove a Security Context Constraint from a User or Group or Service Account

Run a deployment with a Service Account and Security Context Constraint

Update a deployment with Security Context (runAsUser runAsGroup fsGroup)

Create Service Accounts

List Service Accounts

List Service Monitors using the oc get servicemonitors command

Assign an external IP address to a service using the oc patch service command

Create ClusterIP Service

Create ClusterIP Service using the oc expose pod command

Create load balance service using the oc create service command

List Services using REST API

List Services using the oc get services command

Create an SOS report

List SSL certificates in a config map

List SSL certificates in a deployment container args (arguments)

List SSL certificates in a secret

Service CA (certificate authority) SSL certificate

View a pods SSL certificate

Create a Red Hat Single Sign On (SSO) OpenID Connect Identity Provider

Install Red Hat Single Sign On (SSO) Operator on the command line

Install Red Hat Single Sign On (SSO) Operator using the console

Integrate OpenShift with Red Hat SSO (Keycloak)

Setup keycloak resource for Red Hat Single Sign On (SSO)

Sign into OpenShift using Red Hat Single Sign On (SSO)

List stateful sets using REST API

List stateful sets using the oc list statefulsets command

Create Storage Classes using a YAML template file

List Storage Classes using the oc get storageclass command

Getting Started with Templates

List Templates using the oc get templates command

oc adm diagnostics command

Pod stuck Terminating

Resolve "Application is not available"

Resolve "AttachVolume.Attach failed for volume"

Resolve "Cannot evict pod as it would violate the pod's disruption budget"

Resolve "Cluster operator network has not retrieved updates"

Resolve "Cluster version operator has not retrieved updates"

Resolve "Connection refused"

Resolve "Connection timed out"

Resolve "ContainerCreating"

Resolve "context deadline exceeded"

Resolve "CrashLoopBackOff"

Resolve "DaemonSet openshift-sdn is not available awaiting nodes"

Resolve "Deleting protected is not allowed"

Resolve "Disk Watermark High"

Resolve "DiskPressure"

Resolve "Error from server (InternalError): Internal error occurred: unexpected response: 500"

Resolve "Error trying to connect to APM Server"

Resolve "error: tls: failed to parse private key"

Resolve "error: unable to upgrade connection: container not found"

Resolve "exceeded quota"

Resolve "failed quota"

Resolve "failed to pull image manifest unknown ImagePullBackOut"

Resolve "Failed to pull image proxyconnect timeout"

Resolve "FailedMount Unable to attach or mount volumes timed out waiting for the condition"

Resolve "Fluentd cannot be scraped"

Resolve "FluentDVeryHighErrorRate"

Resolve "forbidden: User cannot resource in API group"

Resolve "hostPath type check failed is not a file"

Resolve "hostPath volumes are not allowed to be used"

Resolve "Kubelet stopped posting node status"

Resolve "Missing or incomplete configuration info. Please point to an existing, complete config file"

Resolve "Multi-Attach error for volume"

Resolve "must not have leading or trailing whitespace"

Resolve "Permission Denied" with mounted Persistent Volume Claim

Resolve "Prometheus has failed to evaluate rules in the last 5m"

Resolve "taint that the pod didn't tolerate"

Resolve "ThanosQueryHttpRequestQueryRangeErrorRateHigh"

Resolve "The server uses a certificate signed by an unknown authority"

Resolve "Throttling request took"

Resolve "TLS handshake error from 10.11.12.13:43722: remote error: tls: bad certificate"

Resolve "unable to validate against any security context constraint"

Resolve "verify you have provided the correct host and port and that the server is currently running"

Resolve "You are not a member of any projects"

Resolve "You may not request a new project via this API"

Resolve "You must obtain an API token"

Resolve "You need to be root to perform this command"

Resolve cluster operator degraded

Resolve Elastic Search "failed to create shard failure IOException No space left on device"

Resolve ElasticsearchDiskSpaceRunningLow

Resolve ElasticsearchNodeDiskWatermarkReached

Resolve error: rolebinding found for "Role", not "ClusterRole"

Resolve Liveness or Readiness probe failed

Resolve node status NotReady

Resolve operator-lifecycle-manager-packageserver serving cert not active

Resolve Persistent Volume Claim Lost

Resolve Project stuck in a Terminating state

Resolved "Error creating deployer pod"

Add user to a group using the oc adm groups add-users command

Create group using a YAML template file

Create group using the oc adm groups command

Delete group using REST API

Delete kubeadmin user account

Display user name and token using the oc whoami command

Display users token using the oc config view command

List groups using REST API

List Groups using the oc get groups command

List Users using Python

List Users using the oc get users command

Remove user from a group using the oc admin groups remove-users command

Determine Cluster ID

oc get clusterversion command

Create Persistent Volume

Create Persistent Volume Claim

Create Shared Volume using a YAML template file

Determine Persistent Volume Claim used space

Elastic File System (EFS) for Red Hat OpenShift on Amazon Web Services (AWS) (ROSA)

Label a Persistent Volume using the oc label command

List Persistent Volume Claims using the oc get pvc command

List Persistent Volume Claims using the REST API

List Persistent Volume using the oc get pv command

List Shared Volumes using the oc get sharedvolumes command

Mount a Config Map in a container

Mount a local directory in a container

Mount a Persistent Volume in a container

Mount a Shared Volume in a container

Mount an empty directory in a container using the oc set volume command

Resize Persistent Volume Claim available storage

OpenShift articles