Install Openshift Origin 3.11 OKD on Master, Compute and Infra Centos 7

Step to follow to install OKD v3.11:
************************************

Step 1: Set the hostname:
# hostnamectl set-hostname master.openshift.com # For master node
# hostnamectl set-hostname node1.openshift.com
# hostnamectl set-hostname infra.openshift.com
# bash

2) change the /etc/hosts in all the nodes
~]# vim /etc/hosts
167.254.204.72 master.openshift.com master
167.254.204.61 node1.openshift.com node1
167.254.204.62 infra.openshift.com infra

3)Copy the public key in all the nodes visa-versa
Copy public key to ~/.ssh/id_rsa.pub
Copy public key to ~/.ssh/authorized_keys

4)Install NetworkManager
# sudo yum install NetworkManager
# sudo systemctl start NetworkManager
# sudo yum install -y NetworkManager wget git net-tools bind-utils yum-utils iptables-services bridge-utils bash-completion kexec-tools sos psacct

To disable SE-Linux, this prevents csr approval issues,
# sudo setenforce 0

5) Verify that you’re able to ssh to all the nodes with password less.
# yum update -y

6) Install the following Packages on all nodes:
# yum install -y wget git nano net-tools docker-1.13.1 bind-utils iptables-services bridge-utils bash-completion kexec-tools sos psacct openssl-devel httpd-tools NetworkManager python-cryptography python-devel python-passlib java-1.8.0-openjdk-headless “@Development Tools”

# systemctl start docker && systemctl enable docker && systemctl status docker

7) Configure Ansible Repository on master Node only.
# sudo vim /etc/yum.repos.d/ansible.repo

[ansible]
name = Ansible Repo
baseurl = https://releases.ansible.com/ansible/rpm/release/epel-7-x86_64/
enabled = 1
gpgcheck = 0

:wq! (save and exit)

8) Install Ansible Package and Clone Openshift-Ansible Git Repo on Master Machine :
# sudo yum -y install ansible-2.6* pyOpenSSL
# git clone https://github.com/openshift/openshift-ansible.git
# cd openshift-ansible && git fetch && git checkout release-3.11

9) Goto below file and edit below mentioned ones
# sudo vim /etc/ssh/sshd_config

PubkeyAuthentication yes
PasswordAuthentication yes
:wq!

# systemctl restart sshd

10) Now Create Your Own Inventory file for Ansible as following on master Node:
https://docs.okd.io/latest/install/example_inventories.html#install-config-example-inventories (it can be found here)

[root@master ~]# vim ~/inventory.ini

[OSEv3:children]
masters
nodes
etcd

[masters]
master.openshift.com

[etcd]
master.openshift.com

[nodes]
master.openshift.com openshift_ip=167.254.204.55 openshift_schedulable=true openshift_node_group_name=’node-config-master’
node1.openshift.com openshift_ip=167.254.204.52 openshift_schedulable=true openshift_node_group_name=’node-config-compute’
node2.openshift.com openshift_ip=167.254.204.64 openshift_schedulable=true openshift_node_group_name=’node-config-compute’
infra.openshift.com openshift_ip=167.254.204.80 openshift_schedulable=true openshift_node_group_name=’node-config-infra’

[OSEv3:vars]
debug_level=4
ansible_ssh_user=centos
ansible_become=true
openshift_enable_service_catalog=true
ansible_service_broker_install=true

openshift_node_groups=[{‘name’: ‘node-config-master’, ‘labels’: [‘node-role.kubernetes.io/master=true’]}, {‘name’: ‘node-config-infra’, ‘labels’: [‘node-role.kubernetes.io/infra=true’]}, {‘name’: ‘node-config-compute’, ‘labels’: [‘node-role.kubernetes.io/compute=true’]}]

containerized=false
os_sdn_network_plugin_name=’redhat/openshift-ovs-multitenant’
openshift_disable_check=disk_availability,docker_storage,memory_availability,docker_image_availability

deployment_type=origin
openshift_deployment_type=origin

openshift_release=v3.11.0
openshift_pkg_version=-3.11.0
openshift_image_tag=v3.11.0
openshift_service_catalog_image_version=v3.11.0
template_service_broker_image_version=v3.11
osm_use_cockpit=true

# put the router on dedicated infra1 node
openshift_master_cluster_method=native
openshift_master_default_subdomain=apps.openshift.com
openshift_public_hostname=master.openshift.com

:wq! (save and exit)

11) Use the below ansible playbook command to check the prerequisites to deply OpenShift Cluster on master Node:
# ansible-playbook -i ~/inventory.ini playbooks/prerequisites.yml

12) Once prerequisites completed without any error use the below ansible playbook to Deploy OpenShift Cluster on master Node:
# ansible-playbook -i ~/inventory.ini playbooks/deploy_cluster.yml

source

centos 7