This is simple python script which sends api request to openshift (or kubernetes) master server: /api/v1/pods and parse json response.
usage: pods_on_node.py --ulr openshift_master --node node_name --token bearer_token --warn int_of_pods --crit int_of_pods Nagios plugin to get number of pods in node optional arguments: -h, --help show this help message and exit -u URL, --url URL url:[port] of openshfit or kubernetes master server -n NODE, --node NODE node name for which you need info -t TOKEN,--token TOKEN token for connection to openshift master -w WARN, --warn WARN warning level of quantity pods -c CRIT, --crit CRIT critical level of quantity pods
to use it you have to get token from secret for service account with cluster-reader permissions. If you have configured origin-metrics you can use heapster token:
$ oc describe serviceaccount heapster -n openshift-infra $ oc describe secret heapster-token-vs065 Name: heapster-token-vs065 Namespace: openshift-infra Labels: Annotations: ..... Type: kubernetes.io/service-account-token Data ==== token: HERE IS TOKEN ....
but also you can create new one for nagios:
$ oc create -f - << API apiVersion: v1 kind: ServiceAccount metadata: name: nagios secrets: - name: nagios API $ oc describe serviceaccount nagios $ oc describe secret nagios-token-zzzzz
That's it. Enjoy.