Day: May 5, 2023

kubernetes deployment scale up/down with bash

scale down deploy on weeknend:

####scale down####
namespaces="test,test2"
IFS=","

for namespace in $namespaces
do
    deployments=$(kubectl get deploy -n $namespace | grep -v '0/0' | awk '{print $1}' | sed 1d | tr '\n' ' ')
    IFS=" "
    for deploy in $deployments
    do
        replicas="$(kubectl get deploy $deploy -o=custom-columns='REPLICAS:spec.replicas' -n $namespace | sed 1d | tr '\n' ' ')"
        echo "namespace: $namespace deploy: $deploy replicas: $replicas"
        kubectl label deploy $deploy weekdays-replicas=$replicas -n $namespace --overwrite=true
        kubectl scale --replicas=0 statefulset $deploy -n "$namespace" || true
    done
done

scale-up:

####scale up####
namespaces="test,test2"
IFS=","
for namespace in $namespaces
do
    deployments=$(kubectl get deploy -n $namespace | awk '{print $1}' | sed 1d | tr '\n' ' ')
    IFS=" "
    for deploy in $deployments
    do
        replicas="$(kubectl get deploy $deploy -o=custom-columns='REPLICAS:metadata.labels.weekdays-replicas' -n $namespace | sed 1d | tr '\n' ' ')"
        echo "kubectl scale --replicas=$replicas statefulset $deploy -n "$namespace" || true"
    done
done