Prepare OpenShift

Importing Couchbase RHEL image

• This downloads and imports the couchbase RHEL image into the private registry

make ssh_import_image

Create a couchbase Project and authorize the Service Accounts

• Create a project couchbase
• Allow Service Account default in couchbase to:
  • create resources in its namespace with role edit
  • read node labels with cluster role system:node-reader

make ssh_project

Install patched openshift server 1.3

• Makes DNS resolving work for Pods in state terminating and unready tolerating service
• See PR: https://github.com/kubernetes/kubernetes/pull/37093
• Patched binary available here: https://storage.googleapis.com/jetstack-openshift-builds/openshift-1.3.3-dns-unready-patched.bz2

make ssh_dns_patch

Custom modifications to the scheduler

• Increase weight of zone anti-affinity

• Stronger assuarances only possible with OpenShift 1.4's Pod Annotations (see https://docs.openshift.org/latest/admin_guide/manage_nodes.html#pod-anti-affinity)

• Use k8s' label for zones

• /etc/origin/master/scheduler.json:

{
        "argument": {
                "serviceAntiAffinity": {
                        "label": "failure-domain.beta.kubernetes.io/zone"
                }
        },
                "name": "Zone",
                "weight": 8
}

• systemctl restart origin-master