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gcloud container clusters upgrade $CLUSTER_NAME \
    --region $GCP_REGION \
    --cluster-version $NEW_K8S_VER \
    --project $PROJECT_ID \
    --master

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NODE=$(kubectl get nodes -o wide | grep v1.22.12-gke.2300 | awk '{print $1}'
kubectl -n default cordon $NODE

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gcloud container node-pools delete default-pool \
    --project $PROJECT_ID \
    --cluster $CLUSTER_NAME \
    --region $GCP_REGION

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gcloud container node-pools create pool-gke1-23 \
    --project $PROJECT_ID \
    --cluster $CLUSTER_NAME \
    --region $GCP_REGION \
    --num-nodes $NUM_NODES \
    --machine-type $MACHINE_TYPE \
    --node-labels=nodepool=$NEW_GKE_VER

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# Define env variables
export PROJECT_ID=$(gcloud config get-value project)
export PROJECT_USER=$(gcloud config get-value core/account)
export PROJECT_NUMBER=$(gcloud projects describe $PROJECT_ID --format="value(projectNumber)")
export IDNS=${PROJECT_ID}.svc.id.goog

export GCP_REGION="us-central1"
export GCP_ZONE="us-central1-c"

export NETWORK_NAME="default"

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gcloud config set compute/region $GCP_REGION
gcloud config set compute/zone $GCP_ZONE

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gcloud services enable compute.googleapis.com \
    container.googleapis.com \
    storage.googleapis.com \
    gkebackup.googleapis.com

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export CLUSTER_NAME="gke-central1-a"
gcloud beta container clusters create $CLUSTER_NAME \
    --project=$PROJECT_ID  \
    --region=$LOCATION \
    --addons=BackupRestore \
    --num-nodes=1 \
    --enable-autoupgrade --no-enable-basic-auth \
    --no-issue-client-certificate --enable-ip-alias \
    --metadata disable-legacy-endpoints=true \
    --workload-pool=$IDNS  

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# create Kustomize file
cat > ./kustomization.yaml << EOF
secretGenerator:
- name: mysql-pass
  literals:
  - password=gkebackup2022
EOF

# download manifests
curl -LO https://k8s.io/examples/application/wordpress/mysql-deployment.yaml

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gcloud alpha container backup-restore backup-plans create $BACKUP_PLAN \
    --project=$PROJECT_ID \
    --location=$LOCATION \
    --cluster=$CLUSTER \
    --all-namespaces \
    --include-secrets \
    --include-volume-data \
    --cron-schedule="0 * * * *" \
    --backup-retain-days=$RETAIN_DAYS \
    --locked