comandos de ajuda para trabalhar com kubernets

kubernetes_commands.md

Deletar evicted pods

kubectl get pods -n NAMESPACE | grep Evicted | awk '{print $1}' | xargs kubectl delete pod -n NAMESPACE

Deletar pods em crash

kubectl delete pod -n NAMESPACE `kubectl get pods -n NAMESPACE | awk '$3 == "CrashLoopBackOff" {print $1}'`

Deletar pods de um deploy

kubectl delete pod -n NAMESPACE `kubectl get pods -n NAMESPACE | awk '$1 ~ /^DEPLOY_NAME/ {print $1}'`

Listar pods de um deploy

kubectl -n NAMESPACE get pods | grep DEPLOY_NAME

Consultar qual pod do IP

kubectl get pods -o wide | grep $IP_DO_POD

PORT-FORWARD

kubectl port-forward --namespace NAMESPACE svc/SERVICE_NAME HOST_PORT:SERVICE_PORT

Builda todos os yaml e salva o output pra você analisar

helm template --values ./values-qas.yaml --output-dir manifests .

Recuperar um secret

kubectl get secrets SECRET_NAME -n NAMESPACE -o yaml | jq '.data | map_values(@base64d)'

Editar um secret

kubectl edit secret SECRET_NAME -n NAMESPACE

Recuperar valor de uma variavel de ambiente de um deployment

kubectl get deployment DEPLOY_NAME -o json | jq '.spec.template.spec.containers[0].env[] | select(.name == "ENV_VAR_NAME") | .'

Forçar rolling update de um deployment

#!/bin/bash
PATCH_JSON=("{\"spec\":{\"template\":{\"metadata\":{\"annotations\":{\"date\":\"$(date +'%s')\"}}}}}")
DEPLOY=$1
echo "Deploy => $DEPLOY"
for dep in $(kubectl get deployments | awk -v DEPLOY=$DEPLOY '$1 ~ "^" $DEPLOY {print $1}'); do
  echo "Updating $dep"
  kubectl patch deployment $dep -p $PATCH_JSON; sleep 5s;
done