Kubernetes Cookbook

kubectl get pods --all-namespaces -o wide --field-selector spec.nodeName=<node>

kubectl get pod -A -o=custom-columns=POD_NAME:.metadata.name,STATUS:.status.phase,NAMESPACE:.metadata.namespace,CONTAINER_NAME:.spec.containers[*].name

kubectl get pods -n <namespace>

kubectl get pods -n <namespace> --field-selector "status.phase!=Running"

kubectl get deployments,statefulsets,daemonsets --all-namespaces -o json | \
jq -r '.items[] | select(.spec.template.spec.containers[].image | contains("bitnami/")) | "\(.kind) \(.metadata.namespace)/\(.metadata.name)"'

#!/bin/bash
set -euo pipefail

RESOURCES=("deployments" "statefulsets" "daemonsets")
echo "Searching and patching Bitnami images to Bitnami Legacy..."

for resource in "${RESOURCES[@]}"; do
  echo "Processing ${resource}..."
  
  kubectl get "$resource" --all-namespaces -o json | \
  jq -c '.items[] | select(.spec.template.spec.containers[].image | contains("bitnami/"))' | \
  while read -r item; do
    
    NAME=$(echo "$item" | jq -r '.metadata.name')
    NAMESPACE=$(echo "$item" | jq -r '.metadata.namespace')
    
    echo "-> Patching $resource: $NAMESPACE/$NAME"
    
    PATCH_JSON=$(echo "$item" | jq -c '
      .spec.template.spec.containers |= map(
        if .image | contains("bitnami/") then
          .image |= gsub("bitnami/"; "bitnamilegacy/")
        else
          .
        end
      ) | {spec: {template: {spec: {containers: .spec.template.spec.containers}}}}
    ')
    
    kubectl patch "$resource" "$NAME" -n "$NAMESPACE" --type=merge -p "$PATCH_JSON"
  done
done
echo "Patching complete!"