Kubernetes

kubernetes_cheat_sheet.sh

# get number of running pods
kubectl get -A pods --field-selector=status.phase=Running --output json | jq -j '.items | length'

# get number of NOT running pods
kubectl get -A pods --field-selector=status.phase!=Running --output json | jq -j '.items | length'

# find out why a pod is in pending
describe pod -n <namespace> <pod-name>

# get a node max number of pods
get node vmmts02 -ojsonpath='{.status.capacity.pods}{"\n"}'

# scale a deployment
kubectl scale -n <namespace> --replicas=1 deployment <deployment-name>

# list images
k3s crictl images

# list containers
k3s crictl ps