Install Openshift CRC on your Laptop/Desktop/Workstation - RHEL8/RockyLinux8
Red Hat OpenShift is the Kubernetes platform from Red Hat, and it's designed for the hybrid cloud.?Red Hat CodeReady Containers (CRC) provides a minimal, preconfigured OpenShift 4 cluster on a laptop or desktop machine for development and testing purposes.?CRC is delivered as a platform inside of the VM.
Red Hat OpenShift and Kubernetes are both container orchestration software, but Red Hat OpenShift is packaged as a downstream enterprise open source platform—meaning it’s undergone additional testing and contains additional features not available from the Kubernetes open source project.
Red Hat OpenShift and Kubernetes both manage groups of containers called clusters. Each cluster has 2 parts: a control plane and worker nodes.?Containers run in the worker nodes, each of which has its own Linux operating system.?The control plane maintains the cluster’s overall state while worker nodes do the actual computing work.
Only on Bare Metal & KVM Linux VM :
The steps in this guide are for bare metal server and will also work on KVM Linux VM.
It will not work on VirtualBox Linux VM.
If you are performing installation on KVM VM please enable nested virtualization.
Refer above article for enabling nested virtualization in KVM.
Pre-requisites:
We will need “pull secret” when we start crc.
You can get pull secret from -
Select Openshift > Clusters
Installation steps :
$ wget https://developers.redhat.com/content-gateway/rest/mirror/pub/openshift-v4/clients/crc/latest/crc-linux-amd64.tar.xz
$ tar xvf crc-linux-amd64.tar.xz
$ sudo cp crc /usr/local/bin/
$ crc setup
$ crc start -> when prompted enter pull secret
$ crc oc-env
$ export PATH="/home/prayag/.crc/bin/oc:$PATH"
$ echo 'export PATH="/home/prayag/.crc/bin/oc:$PATH"' >> .bashrc?
$ oc get all
$ oc get nodes
$ oc login -u kubeadmin -p 6EWtq-5qXX3-Sm3i8-Kr6Gq https://api.crc.testing:6443
$ oc login -u developer https://api.crc.testing:6443
Procedure:?
Download Openshift CRC
[prayag@localhost ~]$ wget https://developers.redhat.com/content-gateway/rest/mirror/pub/openshift-v4/clients/crc/latest/crc-linux-amd64.tar.xz
Extract crc
领英推荐
[prayag@localhost ~]$ tar xvf crc-linux-amd64.tar.zx
crc-linux-2.2.2-amd64/
crc-linux-2.2.2-amd64/LICENSE
crc-linux-2.2.2-amd64/crc
Copy crc binary to /usr/local/bin
[prayag@localhost ~]$ cd crc-linux-2.2.2-amd64
[prayag@localhost crc-linux-2.2.2-amd64]$ sudo cp crc /usr/local/bin/
[prayag@localhost crc-linux-2.2.2-amd64]$ cd
[prayag@localhost ~]$ which crc
/usr/local/bin/crc/
Get crc version
[prayag@localhost ~]$ crc version
CRC version: 2.2.2+f1e1d3e
OpenShift version: 4.10.9
Podman version: 3.4.4
[prayag@localhost ~]$ which crc
/usr/local/bin/crc
Run crc setup
[prayag@localhost ~]$ crc setup
CRC is constantly improving and we would like to know more about usage (more details at https://developers.redhat.com/article/tool-data-collection)
Your preference can be changed manually if desired using 'crc config set consent-telemetry <yes/no>'
Would you like to contribute anonymous usage statistics? [y/N]: y
Thanks for helping us! You can disable telemetry with the command 'crc config set consent-telemetry no'.
INFO Using bundle path /home/prayag/.crc/cache/crc_libvirt_4.10.9_amd64.crcbundle
INFO Checking if running as non-root??????????????
INFO Checking if running inside WSL2??????????????
INFO Checking if crc-admin-helper executable is cached
INFO Caching crc-admin-helper executable??????????
INFO Using root access: Changing ownership of /home/prayag/.crc/bin/crc-admin-helper-linux
INFO Using root access: Setting suid for /home/prayag/.crc/bin/crc-admin-helper-linux
INFO Checking for obsolete admin-helper executable
INFO Checking if running on a supported CPU architecture
INFO Checking minimum RAM requirements????????????
INFO Checking if crc executable symlink exists????
INFO Creating symlink for crc executable??????????
INFO Checking if Virtualization is enabled????????
INFO Checking if KVM is enabled??????????????????
INFO Checking if libvirt is installed????????????
INFO Installing libvirt service and dependencies??
INFO Using root access: Installing virtualization packages
INFO Checking if user is part of libvirt group????
INFO Adding user to libvirt group????????????????
INFO Using root access: Adding user to the libvirt group
INFO Checking if active user/process is currently part of the libvirt group
INFO Checking if libvirt daemon is running????????
INFO Checking if a supported libvirt version is installed
INFO Checking if crc-driver-libvirt is installed??
INFO Installing crc-driver-libvirt????????????????
INFO Checking if systemd-networkd is running??????
INFO Checking if NetworkManager is installed??????
INFO Checking if NetworkManager service is running
INFO Checking if /etc/NetworkManager/conf.d/crc-nm-dnsmasq.conf exists
INFO Writing Network Manager config for crc??????
INFO Using root access: Writing NetworkManager configuration to /etc/NetworkManager/conf.d/crc-nm-dnsmasq.conf
INFO Using root access: Changing permissions for /etc/NetworkManager/conf.d/crc-nm-dnsmasq.conf to 644??
INFO Using root access: Executing systemctl daemon-reload command
INFO Using root access: Executing systemctl reload NetworkManager
INFO Checking if /etc/NetworkManager/dnsmasq.d/crc.conf exists
INFO Writing dnsmasq config for crc??????????????
INFO Using root access: Writing NetworkManager configuration to /etc/NetworkManager/dnsmasq.d/crc.conf
INFO Using root access: Changing permissions for /etc/NetworkManager/dnsmasq.d/crc.conf to 644??
INFO Using root access: Executing systemctl daemon-reload command
INFO Using root access: Executing systemctl reload NetworkManager
INFO Checking if libvirt 'crc' network is available
INFO Setting up libvirt 'crc' network????????????
INFO Checking if libvirt 'crc' network is active??
INFO Starting libvirt 'crc' network??????????????
INFO Checking if CRC bundle is extracted in '$HOME/.crc'
INFO Checking if /home/prayag/.crc/cache/crc_libvirt_4.10.9_amd64.crcbundle exists
INFO Getting bundle for the CRC executable????????
INFO Downloading crc_libvirt_4.10.9_amd64.crcbundle
3.15 GiB / 3.15 GiB [-----------------------------------------------------------------------------------------------------------------------------] 100.00% 10.31 MiB p/s
INFO Uncompressing /home/prayag/.crc/cache/crc_libvirt_4.10.9_amd64.crcbundle
crc.qcow2: 12.93 GiB / 12.93 GiB [------------------------------------------------------------------------------------------------------------------------------] 100.00%
oc: 117.14 MiB / 117.14 MiB [-----------------------------------------------------------------------------------------------------------------------------------] 100.00%
Your system is correctly setup for using CRC. Use 'crc start' to start the instance
Start CRC and when prompted enter pull secret
[prayag@localhost ~]$ crc start
INFO Checking if running as non-root??????????????
INFO Checking if running inside WSL2??????????????
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 crc executable symlink exists????
INFO Checking if Virtualization is enabled????????
INFO Checking if KVM is enabled??????????????????
INFO Checking if libvirt is installed????????????
INFO Checking if user is part of libvirt group????
INFO Checking if active user/process is currently part of the libvirt group
INFO Checking if libvirt daemon is running????????
INFO Checking if a supported libvirt version is installed
INFO Checking if crc-driver-libvirt is installed??
INFO Checking if systemd-networkd is running??????
INFO Checking if NetworkManager is installed??????
INFO Checking if NetworkManager service is running
INFO Checking if /etc/NetworkManager/conf.d/crc-nm-dnsmasq.conf exists
INFO Checking if /etc/NetworkManager/dnsmasq.d/crc.conf exists
INFO Checking if libvirt 'crc' network is available
INFO Checking if libvirt 'crc' network is active??
INFO Loading bundle: crc_libvirt_4.10.9_amd64...??
CRC requires a pull secret to download content from Red Hat.
You can copy it from the Pull Secret section of https://cloud.redhat.com/openshift/create/local.
? Please enter the pull secret ******************************************************************************************************************************************
WARN Cannot add pull secret to keyring: failed to unlock correct collection '/org/freedesktop/secrets/aliases/default'
INFO Creating CRC VM for OpenShift 4.10.9...??????
INFO Generating new SSH Key pair...??????????????
INFO Generating new password for the kubeadmin user
INFO Starting CRC VM for OpenShift 4.10.9...??????
INFO CRC instance is running with IP 192.168.130.11
INFO CRC VM is running????????????????????????????
INFO Updating authorized keys...??????????????????
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 Waiting for kube-apiserver availability... [takes around 2min]
INFO Adding user's pull secret to the cluster...??
INFO Updating SSH key to machine config resource...
INFO Waiting for user's pull secret part of instance disk...
INFO Changing the password for the kubeadmin user
INFO Updating cluster ID...??????????????????????
INFO Updating root CA cert to admin-kubeconfig-client-ca configmap...
INFO Starting OpenShift cluster... [waiting for the cluster to stabilize]
[INFO 4 operators are progressing: image-registry, network, openshift-controller-manager, service-ca
INFO 2 operators are progressing: image-registry, 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 All operators are available. Ensuring stability...
INFO Operators are stable (2/3)...????????????????
INFO Operators are stable (3/3)...????????????????
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: 6EWtq-5qXX3-Sm3i8-Kr6Gq
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:6443t
Set oc path
[prayag@localhost ~]$ crc oc-env
export PATH="/home/prayag/.crc/bin/oc:$PATH"
# Run this command to configure your shell:
# eval $(crc oc-env)
[prayag@localhost ~]$? 'export PATH="/home/prayag/.crc/bin/oc:$PATH"
[prayag@localhost ~]$ echo 'export PATH="/home/prayag/.crc/bin/oc:$PATH"' >> .bashrc?
[prayag@localhost ~]$ which oc
~/.crc/bin/oc/oc
Login as kubeadmin
[prayag@localhost ~]$ oc login -u kubeadmin -p 6EWtq-5qXX3-Sm3i8-Kr6Gq https://api.crc.testing:644
[prayag@localhost ~]$ oc get all
NAME ? ? ? ? ? ? ? ? TYPE ? ? ? ? ? CLUSTER-IP ? EXTERNAL-IP? ? ? ? ? ? ? ? ? ? ? ? ? ? PORT(S) ? AGE
service/kubernetes ? ClusterIP? ? ? 10.217.4.1 ? <none> ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? 443/TCP ? 15d
service/openshift? ? ExternalName ? <none> ? ? ? kubernetes.default.svc.cluster.local ? <none>? ? 15d
[prayag@localhost ~]$ oc get nodes
NAME ? ? ? ? ? ? ? ? STATUS ? ROLES ? ? ? ? ? AGE ? VERSION
crc-gh9wd-master-0 ? Ready? ? master,worker ? 15d ? v1.23.5+9ce5071
[prayag@localhost ~]$ oc get nodes -o wide
NAME ? ? ? ? ? ? ? ? STATUS ? ROLES ? ? ? ? ? AGE ? VERSION ? ? ? ? ? INTERNAL-IP? ? ? EXTERNAL-IP ? OS-IMAGE? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? KERNEL-VERSION ? ? ? ? ? ? ? ? CONTAINER-RUNTIME
crc-gh9wd-master-0 ? Ready? ? master,worker ? 15d ? v1.23.5+9ce5071 ? 192.168.126.11 ? <none>? ? ? ? Red Hat Enterprise Linux CoreOS 410.84.202204050541-0 (Ootpa) ? 4.18.0-305.40.2.el8_4.x86_64 ? cri-o://1.23.2-4.rhaos4.10.git9ef73d4.el8
[prayag@localhost ~]$?3
Login as developer
[prayag@localhost ~]$ 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>
[prayag@localhost ~]$?
Create new project and new app
[prayag@localhost ~]$ oc new-project web-app
Now using project "web-app" 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/e2e-test-images/agnhost:2.33 -- /agnhost serve-hostname
[prayag@localhost ~]$ oc new-app --template=openshift/nginx-example --name=nginx-app --param=NAME=nginx-app
warning: Cannot find git. Ensure that it is installed and in your path. Git is required to work with git repositories.
--> Deploying template "openshift/nginx-example" for "openshift/nginx-example" to project web-app
? ? ?Nginx HTTP server and a reverse proxy
? ? ?---------
? ? ?An example Nginx HTTP server and a reverse proxy (nginx) application that serves static content. For more information about using this template, including OpenShift considerations, see https://github.com/sclorg/nginx-ex/blob/master/README.md.
? ? ?The following service(s) have been created in your project: nginx-app.
? ? ?
? ? ?For more information about using this template, including OpenShift considerations, see https://github.com/sclorg/nginx-ex/blob/master/README.md.
? ? ?* With parameters:
? ? ? ? * Name=nginx-app
? ? ? ? * Namespace=openshift
? ? ? ? * NGINX Version=1.20-el8
? ? ? ? * Memory Limit=512Mi
? ? ? ? * Git Repository URL=https://github.com/sclorg/nginx-ex.git
? ? ? ? * Git Reference=
? ? ? ? * Context Directory=
? ? ? ? * Application Hostname=
? ? ? ? * GitHub Webhook Secret=dgayUGGJpLFpGutnfQy8xT3uLJhdwdvvH81uHxHY # generated
? ? ? ? * Generic Webhook Secret=pYQHjlkD6TSFgUHnxYAIfmt7Nk34ojbtkYXygnQd # generated
--> Creating resources ...
? ? service "nginx-app" created
? ? route.route.openshift.io "nginx-app" created
? ? imagestream.image.openshift.io "nginx-app" created
? ? buildconfig.build.openshift.io "nginx-app" created
? ? deploymentconfig.apps.openshift.io "nginx-app" created
--> Success
? ? Access your application via route 'nginx-app-web-app.apps-crc.testing'?
? ? Build scheduled, use 'oc logs -f buildconfig/nginx-app' to track its progress.
? ? Run 'oc status' to view your app.
[prayag@localhost ~]$ oc status
In project web-app on server https://api.crc.testing:6443
https://nginx-app-web-app.apps-crc.testing (svc/nginx-app)
? dc/nginx-app deploys istag/nginx-app:latest <-
? ? bc/nginx-app source builds https://github.com/sclorg/nginx-ex.git on openshift/nginx:1.20-el8?
? ? ? not built yet
? ? deployment #1 waiting on image or update
Get service and route details
[prayag@localhost ~]$ oc get svc
NAME? ? ? ? TYPE? ? ? ? CLUSTER-IP? ? ?EXTERNAL-IP? ?PORT(S)? ? AGE
nginx-app? ?ClusterIP? ?10.217.5.137? ?<none>? ? ? ? 8080/TCP? ?39s
[prayag@localhost ~]$ oc get route nginx-app
NAME? ? ? ? HOST/PORT? ? ? ? ? ? ? ? ? ? ? ? ? ? PATH? ?SERVICES? ? PORT? ? TERMINATION? ?WILDCARD
nginx-app? ?nginx-app-web-app.apps-crc.testing? ? ? ? ? nginx-app? ?<all>?
?
? ? ? ? ? ? ?None
[prayag@localhost ~]$ curl nginx-app-web-app.apps-crc.testing
<html>
? <head>
? ? <meta name="viewport" content="width=device-width, initial-scale=1">
? ? <style type="text/css">
? ? ? body {
? ? ? ? font-family: "Helvetica Neue", Helvetica, Arial, sans-serif;
? ? ? ? line-height: 1.66666667;
? ? ? ? font-size: 16px;
? ? ? ? color: #333;
? ? ? ? background-color: #fff;
? ? ? ? margin: 2em 1em;
? ? ? }
? ? ? h1 {
? ? ? ? font-size: 28px;
? ? ? ? font-weight: 400;
? ? ? }
? ? ? p {
? ? ? ? margin: 0 0 10px;
? ? ? }
? ? ? .alert.alert-info {
? ? ? ? background-color: #F0F0F0;
? ? ? ? margin-top: 30px;
? ? ? ? padding: 30px;
? ? ? }
? ? ? .alert p {
? ? ? ? padding-left: 35px;
? ? ? }
? ? ? ul {
? ? ? ? padding-left: 51px;
? ? ? ? position: relative;
? ? ? }
? ? ? li {
? ? ? ? font-size: 14px;
? ? ? ? margin-bottom: 1em;
? ? ? }
? ? ? p.info {
? ? ? ? position: relative;
? ? ? ? font-size: 20px;
? ? ? }
? ? ? p.info:before, p.info:after {
? ? ? ? content: "";
? ? ? ? left: 0;
? ? ? ? position: absolute;
? ? ? ? top: 0;
? ? ? }
? ? ? p.info:before {
? ? ? ? background: #0066CC;
? ? ? ? border-radius: 16px;
? ? ? ? color: #fff;
? ? ? ? content: "i";
? ? ? ? font: bold 16px/24px serif;
? ? ? ? height: 24px;
? ? ? ? left: 0px;
? ? ? ? text-align: center;
? ? ? ? top: 4px;
? ? ? ? width: 24px;
? ? ? }
? ? ? @media (min-width: 768px) {
? ? ? ? body {
? ? ? ? ? margin: 6em;
? ? ? ? }
? ? ? }
? ? </style>
? </head>
? <body>
? ? <div>
? ? ? <h1>Application is not available</h1>
? ? ? <p>The application is currently not serving requests at this endpoint. It may not have been started or is still starting.</p>
? ? ? <div class="alert alert-info">
? ? ? ? <p class="info">
? ? ? ? ? Possible reasons you are seeing this page:
? ? ? ? </p>
? ? ? ? <ul>
? ? ? ? ? <li>
? ? ? ? ? ? <strong>The host doesn't exist.</strong>
? ? ? ? ? ? Make sure the hostname was typed correctly and that a route matching this hostname exists.
? ? ? ? ? </li>
? ? ? ? ? <li>
? ? ? ? ? ? <strong>The host exists, but doesn't have a matching path.</strong>
? ? ? ? ? ? Check if the URL path was typed correctly and that the route was created using the desired path.
? ? ? ? ? </li>
? ? ? ? ? <li>
? ? ? ? ? ? <strong>Route and path matches, but all pods are down.</strong>
? ? ? ? ? ? Make sure that the resources exposed by this route (pods, services, deployment configs, etc) have at least one pod running.
? ? ? ? ? </li>
? ? ? ? </ul>
? ? ? </div>
? ? </div>
? </body>
</html>
[prayag@localhost ~]$?
I hope you found this article to be useful in some way. I'll be back with some more interesting new DevOps articles soon.
Founder and CEO at Foxfennecs Technologies LLP
3 个月Can CRC be accessed from other locations? Specifically, can it be used from locations other than localhost?
Associate Consultant at Infosys | CKA Certified | AWS Certified Solutions Architect associate
9 个月Go to the nginx service yaml on openshift console and change the port to 80 you will be able to get content on https://nginx-app-openshift.apps-crc.testing/