OpenShift

System Requirements

• For this cluster setup you will need the following VM or Hardware Requirements:

3 - CentOS 7.5 VMs or hosts
8 vCPUs
12-16 GB RAM
80 GB HDD space (custom partition — 8GB swap, 1GB /boot, rest for / partition)
1 NIC interface with static address and gateway configured

Prequisites

Perform these steps on all 3 hosts

• Add the IP address, hostname and FQDN of each node to /etc/hosts for each host

10.1.10.27  opshmaster opshmaster.avifl.com
10.1.10.28  opshnode1 opshnode1.avifl.com
10.1.10.29  opshnode2 opshnode2.avifl.com

• Run ssh-keygen, accept the default location of the key and do not set a password for the key.

• Run the following bash script:

for host in opshmaster.avifl.com \
   opshnode1.avifl.com \
   opshnode2.avifl.com; \
   do ssh-copy-id -i ~/.ssh/id_rsa.pub $host; \
   done

• Install the following pre-requirements:

yum -y install yum yum-utils wget git net-tools bind-utils iptables-services bridge-utils NetworkManager
yum -y install ansible pyOpenSSL python python-yaml python-dbus python-cryptography python-lxml docker tesseract nano
yum -y update

• Setup Docker pre-requirements:

systemctl enable docker
systemctl start docker

• Restart all 3 hosts

OpenShift Instrallation

git clone --single-branch -b release-3.9 https://github.com/openshift/openshift-ansible
cd openshift-ansible/

Disable Kube-Proxy

References

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