feat(system): upgrade k3s automatically

system/system-upgrade/k3s/agent.yaml

@@ -0,0 +1,35 @@
+apiVersion: upgrade.cattle.io/v1
+kind: Plan
+metadata:
+  name: k3s-agent
+  namespace: system-upgrade
+  labels:
+    k3s-upgrade: agent
+spec:
+  concurrency: 1
+  nodeSelector:
+    matchExpressions:
+      - key: k3s-upgrade
+        operator: Exists
+      - key: k3s-upgrade
+        operator: NotIn
+        values:
+          - 'disabled'
+          - 'false'
+      - key: k3os.io/mode
+        operator: DoesNotExist
+      - key: node-role.kubernetes.io/control-plane
+        operator: DoesNotExist
+  serviceAccountName: system-upgrade
+  prepare:
+    image: rancher/k3s-upgrade
+    args:
+      - prepare
+      - k3s-server
+  cordon: true
+  drain:
+    force: true
+    skipWaitForDeleteTimeout: 300  # Honor PodDisruptionBudgets
+  upgrade:
+    image: rancher/k3s-upgrade
+  channel: https://update.k3s.io/v1-release/channels/v1.23

system/system-upgrade/k3s/kustomization.yaml

@@ -0,0 +1,6 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - server.yaml
+  - agent.yaml

system/system-upgrade/k3s/server.yaml

@@ -0,0 +1,30 @@
+apiVersion: upgrade.cattle.io/v1
+kind: Plan
+metadata:
+  name: k3s-server
+  namespace: system-upgrade
+  labels:
+    k3s-upgrade: server
+spec:
+  concurrency: 1
+  nodeSelector:
+    matchExpressions:
+      - key: k3s-upgrade
+        operator: Exists
+      - key: k3s-upgrade
+        operator: NotIn
+        values:
+          - 'disabled'
+          - 'false'
+      - key: k3os.io/mode
+        operator: DoesNotExist
+      - key: node-role.kubernetes.io/control-plane
+        operator: Exists
+  serviceAccountName: system-upgrade
+  cordon: true
+  drain:
+    force: true
+    skipWaitForDeleteTimeout: 300  # Honor PodDisruptionBudgets
+  upgrade:
+    image: rancher/k3s-upgrade
+  channel: https://update.k3s.io/v1-release/channels/v1.23

system/system-upgrade/kustomization.yaml

@@ -0,0 +1,6 @@
+apiVersion: kustomize.config.k8s.io/v1beta1
+kind: Kustomization
+
+resources:
+  - https://github.com/rancher/system-upgrade-controller/releases/download/v0.8.1/system-upgrade-controller.yaml
+  - k3s