OKD - 3.11

This Vagrantfile create 4 machines, one with the roles "master" and "infra", other two with the "node" role and another one for storage/identity purposes:

Everything is installed during the provisioning stage, this means that after the provisioning step, vagrant execute these two commands:

ansible-playbook /root/openshift-ansible/playbooks/prerequisites.yml
ansible-playbook /root/openshift-ansible/playbooks/deploy_cluster.yml

The ansible on master machine is preconfigured with the keys and the hosts to access the other machines without problems. During provisioning step, the preconfigured inventory presented in files/hosts is copied to the master's /etc/ansible/hosts.

NAT

Some configurations on the inventory /etc/ansible/hosts was added to overcome problems with default NAT interface that vagrant creates:

• etcd_ip
• openshift_public_ip
• openshift_public_hostname

Disabled Services

• openshift_logging_install_logging
• openshift_enable_olm
• openshift_enable_service_catalog
• ansible_service_broker_install
• template_service_broker_install

Requirements

From a software point of view, you will need a least VirtualBox. From a hardware point of view, each machine uses 2 cpu cores, unless the storage one. The master is configured to use 6GiB of RAM, the node ones 2GiB and the storage 256MiB, so you will need at least 11GiB of RAM, or even less if you lower the memory of each vm. If you disable the openshift_metrics_install_metrics you can lower the memory from 6GiB to ~2GiB on master, and each node to 1GiB.

Installation

This takes a lot of time, just go to the cloned folder and type:

vagrant up

If you want to access the webconsole and/or see metrics you can add the hostnames and ip address on /etc/hosts:

echo '172.27.11.10 okd.example.com' | sudo tee -a /etc/hosts

On Windows you should modify c:\Windows\System32\Drivers\etc\hosts

Remeber to access the address https://hawkular-metrics.172-27-11-10.nip.io and accept the self-signed certificate.

And then access the address https://okd.example.com:8443. The username and password are developer and 4linux.

Low Memory

If your machine have 8 GB or less of free memory still possible to provision OKD with one machine, disabling the metrics service. To do this clone the repository and do the following:

cd 4542/
mv Vagrantfile old-Vagrantfile
mv Allinone Vagrantfile
vagrant up

In this way only two virtual machines are created, the master with 4GB and all services on it and extras with NFS and LDAP.