configurations.md

Following steps are how you need to bring up your nodes before running ansible

• Reimage all your servers with :

/cs-shared/server-manager/client/server-manager reimage --server_id server1 redhat-7.5-minimal

• Setup environment(all nodes):
  • Register all nodes in cluster using Red Hat Subscription Manager (RHSM)

    (all-nodes)# subscription-manager register --username <username> --password <password> --force

  • List the available subscriptions

    (all-nodes)# subscription-manager list --available --matches '*OpenShift*'

  • From the previous command, find the pool ID for OpenShift Container Platform subscription & attach it

    (all-nodes)# subscription-manager attach --pool=<pool-ID>

  • Disable all yum respositories

    (all-nodes)# subscription-manager repos --disable="*"

  • Enable only the repositories required by OpenShift Container Platform 3.9

    subscription-manager repos \
        --enable="rhel-7-server-rpms" \
        --enable="rhel-7-server-extras-rpms" \
        --enable="rhel-7-server-ose-3.9-rpms" \
        --enable="rhel-7-fast-datapath-rpms" \
        --enable="rhel-7-server-ansible-2.5-rpms"

  • Install EPEL

    (all-nodes)# yum install wget -y && wget -O /tmp/epel-release-latest-7.noarch.rpm               https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm && rpm -ivh /tmp/epel-release-latest-7.noarch.rpm

  • Update the system to use the latest packages

    (all-nodes)# yum update -y

  • Install the following package, which provides OpenShift Container Platform utilities

    (all-nodes)# yum install atomic-openshift-excluder atomic-openshift-utils git python-netaddr -y

  • Remove the atomic-openshift packages from the list for the duration of the installation

    (all-nodes)# atomic-openshift-excluder unexclude -y

  • Enforce SELinux security policy

    (all-nodes)# vi /etc/selinux/config
                SELINUX=enforcing