okd-installation-centos

About...

*This repository is used to create OKD 3.11 Cluster with 9 simple steps on *Bare VM's**

Table of Contents

• What are the pre-requisites ?
• What are the VM's provisioned ?
• How to deploy okd cluster ?
• How to access okd Console ?
• What are the addons provided ?

What are the prerequisites ?

• Git

What are the VM's provisioned ?

Note: We are not going to create any VM's during this process. User is expected to have VM's before proceeding with this repository

*Below is the example configuration that we are going to refer through out this repository.*

How to deploy openshift cluster ?

Step 1

Update the system and host names for all nodes

• 100.10.10.100 (okd-master-node)
• 100.10.10.101 (okd-worker-node-1)
• 100.10.10.102 (okd-worker-node-2)
• 100.10.10.103 (okd-worker-node-3)
• 100.10.10.104 (okd-infra-node-1)

Unix Command!!!

$ yum update -y

$ nano /etc/hostname (OR) $ nmtui

Step 2

Enable SELINUX=enforcing on all master/worker/infra nodes

• 100.10.10.100 (okd-master-node)
• 100.10.10.101 (okd-worker-node-1)
• 100.10.10.102 (okd-worker-node-2)
• 100.10.10.103 (okd-worker-node-3)
• 100.10.10.104 (okd-infra-node-1)

Unix Command!!!

$ nano /etc/selinux/config

We can verify the status by running the below command. The correct status will not reflect once we changed until we reboot the machines

$ sestatus

Step 3

Reboot all master/worker/infra nodes

• 100.10.10.100 (okd-master-node)
• 100.10.10.101 (okd-worker-node-1)
• 100.10.10.102 (okd-worker-node-2)
• 100.10.10.103 (okd-worker-node-3)
• 100.10.10.104 (okd-infra-node-1)

Unix Command!!!

$ reboot

Step 4

Checkout the code (git clone https://github.com/SubhakarKotta/okd-installation-centos.git)

Configure okd-installation-centos/provisioning/settings.sh file

Step 5

Copy "okd-installation-centos" folder to all master/worker nodes

• 100.10.10.100 (okd-master-node)
• 100.10.10.101 (okd-worker-node-1)
• 100.10.10.102 (okd-worker-node-2)
• 100.10.10.103 (okd-worker-node-3)
• 100.10.10.104 (okd-infra-node-1)

Example copy to root folder and execution permissions can be applied by executing the below command.

Unix Command!!!

$ chmod +x -R okd-installation-centos

Step 6

Execute the below script on all master/worker/infra nodes

• 100.10.10.100 (okd-master-node)
• 100.10.10.101 (okd-worker-node-1)
• 100.10.10.102 (okd-worker-node-2)
• 100.10.10.103 (okd-worker-node-3)
• 100.10.10.104 (okd-infra-node-1)

Unix Command!!!

$ okd-installation-centos/provisioning/install_prerequisites.sh

Step 7

Enable SSH to communicate all the other "worker/infra nodes" from "master" with out "password". All the below commands needs to be executed on "master" node only

• 100.10.10.101 (okd-master-node)

Unix Command!!!

$ ssh-keygen -t rsa

okd-master-node

$ cat ~/.ssh/id_rsa.pub | ssh root@100.10.10.100 "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys"

okd-worker-node-1

$ cat ~/.ssh/id_rsa.pub | ssh root@100.10.10.101 "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys"

okd-worker-node-2

$ cat ~/.ssh/id_rsa.pub | ssh root@100.10.10.102 "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys"

okd-worker-node-3

$ cat ~/.ssh/id_rsa.pub | ssh root@100.10.10.103 "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys"

okd-infra-node-4

$ cat ~/.ssh/id_rsa.pub | ssh root@100.10.10.104 "mkdir -p ~/.ssh && cat >> ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys"

Step 8

Execute the below script only on master node

• 100.10.10.101 (okd-master-node)

Unix Command!!!

$ okd-installation-centos/provisioning/install_master.sh

Step 9

Verify okd installation is success by executing below two commands to see all the nodes and pods.

Unix Command!!!

$ oc login -u admin -p admin https://console.okd.nip.io:8443

$ oc get projects

How to access okd Console ?

The okd Console can be accessed via the below URL from your local machine

https://console.okd.nip.io:8443

What are the addons provided ?

• helm