Memory reservation monitor for Openshift

Why

Needed a way to check the reservation reported back from openshift nodes

How

APIs

Installation

pip install -r requirements.txt

Preparing OpenShift

• Install the following RPMs from the EPEL repo
  • yum install python-requests
  • yum install python2-bitmath
• Copy the file ./monitor.py into /usr/local/bin and chmod +x /usr/local/bin/monitor.py
• As a user with cluster-admin permissions:
  • Create a service account to use
    • oc create sa zabbix -n default
  • Grant cluster-reader permission to the service account
    • oc adm policy add-cluster-role-to-user cluster-reader system:serviceaccount:default:zabbix -n default
  • Retrieve the token from the service account
    • oc get sa zabbix -o yaml -n default
  • Find the name of the secret that contains the token (e.g. zabbix-token-7gp29)
    • oc get secret zabbix-token-7gp29 -o yaml
  • Find the token: and decode it:
    • base64 --decode <token>
  • Test the monitor:
    • /usr/local/bin/monitor.py -m <Master-URL> -n <Internal Node Name> -t <Decoded Token>