rainist/kubeletter repository overview

⁠Kubeletter

Monitor k8s cluster by executing kubectl commands

⁠How it works

1. execute commands like kubectl top nodes
2. parse the printed results and process into data
3. compare the data with past data and make report out of it
4. deliver the report via Slack and email

⁠Prerequisites

configure kubectl to connect to your k8s cluster

⁠How to run

⁠Use your local kubectl to develop

⁠proxy

$ kubectl proxy --address="0.0.0.0" --accept-hosts '.*' --reject-methods=NONE

⁠Example ENVs

KUBERNETES_SERVICE_PORT=8001
KUBERNETES_SERVICE_HOST=docker.for.mac.localhost
INDIVISUAL_COUNT_LIMIT=3 # default is 5 and -1 means no limit

⁠Running as a k8s container

Simply pass just RUNNING_INSIDE_K8S=true to run kubectl properly inside a k8s cluster

⁠Troubleshooting

⁠It seems like it's not working inside k8s cluster

you can debug this by entering the pod and run necessaray commands like below

• kubectl get pod
• kubectl get node
• kubectl get hpa
• kubectl top node
• kubectl top pod
• kubectl cluster-info

if any of commands above doesn't work, that's probably because your service account tied to your deployment has not enough permissions; in that case you might want to look at https://kubernetes.io/docs/reference/access-authn-authz/rbac/⁠