101-monitor-pods

monitor-pods-hook example

Example of monitoring new Pods.

Run

Build shell-operator image with custom script:

$ docker build -t "registry.mycompany.com/shell-operator:monitor-pods" .
$ docker push registry.mycompany.com/shell-operator:monitor-pods

Edit image in shell-operator-pod.yaml and apply manifests:

$ kubectl create ns example-monitor-pods
$ kubectl -n example-monitor-pods apply -f shell-operator-rbac.yaml  
$ kubectl -n example-monitor-pods apply -f shell-operator-pod.yaml

Scale kubernetes-dashboard to trigger onKuberneteEvent:

$ kubectl -n kube-system scale --replicas=1 deploy/kubernetes-dashboard

See in logs that hook was run:

$ kubectl -n example-monitor-pods logs po/shell-operator

...
Pod 'kubernetes-dashboard-769df5545f-pzg7x' added
...
Pod 'kubernetes-dashboard-769df5545f-xnmdl' added
...

cleanup

$ kubectl delete clusterrolebinding/monitor-pods
$ kubectl delete clusterrole/monitor-pods
$ kubectl delete ns/example-monitor-pods
$ docker rmi registry.mycompany.com/shell-operator:monitor-pods