KubeZero/admin/upgrade_cluster.sh

#!/bin/bash -e

VERSION="v1.23"
#VERSION="latest"
ARGO_APP=${1:-/tmp/new-kubezero-argoapp.yaml}

SCRIPT_DIR=$( cd -- "$( dirname -- "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )
. $SCRIPT_DIR/libhelm.sh

[ -n "$DEBUG" ] && set -x


all_nodes_upgrade() {
  CMD="$1"

  echo "Deploy all node upgrade daemonSet(busybox)"
  cat <<EOF | kubectl apply -f -
apiVersion: apps/v1
kind: DaemonSet
metadata:
  name: kubezero-all-nodes-upgrade
  namespace: kube-system
  labels:
    app: kubezero-upgrade
spec:
  selector:
    matchLabels:
      name: kubezero-all-nodes-upgrade
  template:
    metadata:
      labels:
        name: kubezero-all-nodes-upgrade
    spec:
      tolerations:
      - key: node-role.kubernetes.io/master
        operator: Exists
        effect: NoSchedule
      initContainers:
      - name: node-upgrade
        image: busybox
        command: ["/bin/sh"]
        args: ["-x", "-c", "$CMD" ]
        volumeMounts:
        - name: host
          mountPath: /host
        securityContext:
          capabilities:
            add: ["SYS_ADMIN"]
      containers:
      - name: node-upgrade-wait
        image: busybox
        command: ["sleep", "3600"]
      volumes:
      - name: host
        hostPath:
          path: /
          type: Directory
EOF

  kubectl rollout status daemonset -n kube-system kubezero-all-nodes-upgrade --timeout 300s
  kubectl delete ds kubezero-all-nodes-upgrade -n kube-system
}


control_plane_upgrade() {
  TASKS="$1"

  echo "Deploy cluster admin task: $TASK"
  cat <<EOF | kubectl apply -f -
apiVersion: v1
kind: Pod
metadata:
  name: kubezero-upgrade
  namespace: kube-system
  labels:
    app: kubezero-upgrade
spec:
  hostNetwork: true
  hostIPC: true
  hostPID: true
  containers:
  - name: kubezero-admin
    image: public.ecr.aws/zero-downtime/kubezero-admin:${VERSION}
    imagePullPolicy: Always
    command: ["kubezero.sh"]
    args: [$TASKS]
    env:
    - name: DEBUG
      value: "$DEBUG"
    - name: NODE_NAME
      valueFrom:
        fieldRef:
          fieldPath: spec.nodeName
    volumeMounts:
    - name: host
      mountPath: /host
    - name: workdir
      mountPath: /tmp
    securityContext:
      capabilities:
        add: ["SYS_CHROOT"]
  volumes:
  - name: host
    hostPath:
      path: /
      type: Directory
  - name: workdir
    emptyDir: {}
  nodeSelector:
    node-role.kubernetes.io/control-plane: ""
  tolerations:
  - key: node-role.kubernetes.io/master
    effect: NoSchedule
  restartPolicy: Never
EOF

  kubectl wait pod kubezero-upgrade -n kube-system --timeout 120s --for=condition=initialized 2>/dev/null
  while true; do
    kubectl logs kubezero-upgrade -n kube-system -f 2>/dev/null && break
    sleep 3
  done
  kubectl delete pod kubezero-upgrade -n kube-system
}

argo_used && disable_argo

all_nodes_upgrade "mount --make-shared /host/sys/fs/cgroup; mount --make-shared /host/sys;"

control_plane_upgrade kubeadm_upgrade

#echo "Adjust kubezero-values CM !!"
#read

kubectl delete ds kube-multus-ds -n kube-system

# Required due to chart upgrade to 4.X part of prometheus-stack 40.X
kubectl delete daemonset metrics-prometheus-node-exporter -n monitoring

control_plane_upgrade "apply_network, apply_addons"

kubectl rollout restart daemonset/calico-node -n kube-system
kubectl rollout restart daemonset/cilium -n kube-system
kubectl rollout restart daemonset/kube-multus-ds -n kube-system

argo_used && enable_argo

# Final step is to commit the new argocd kubezero app
kubectl get app kubezero -n argocd -o yaml | yq 'del(.status) | del(.metadata) | .metadata.name="kubezero" | .metadata.namespace="argocd"' | yq 'sort_keys(..) | .spec.source.helm.values |= (from_yaml | to_yaml)' > /tmp/new-kubezero-argoapp.yaml

echo "Please commit $ARGO_APP as the updated kubezero/application.yaml for your cluster."
echo "Then head over to ArgoCD for this cluster and sync all KubeZero modules to apply remaining upgrades."