Add Daily Reboot Cronjob (K8s)

charts/palworld/VALUES_SUMMARY.md

@@ -29,6 +29,10 @@ This chart will provide a Palworld server installation on a kubernetes cluster.
 | server.config.annotations | object | `{}` | Additional annotations to the resources |
 | server.config.community.enable | bool | `true` | Enables/disables the visibility of this server on Steam community servers list. |
 | server.config.community.password | string | `""` | If not provided, a random password will be generated and stored on the secret. |
+| server.config.daily_reboot.enable | bool | `false` | Enable daily reboot. Disabled by default |
+| server.config.daily_reboot.role | string | `"daily-reboot"` | The name of the role performing the daily reboot. |
+| server.config.daily_reboot.serviceAccount | string | `"daily-reboot"` | The name of the Service Account used to perform the reboot. |
+| server.config.daily_reboot.time | string | `"30 9 * * *"` | The time (UTC) the server will perform the reboot. By default, this schedules the restart at 9:30am UTC. Please note, this is using cron syntax. |
 | server.config.labels | object | `{}` | Additional labels to the resources |
 | server.config.max_players | int | `16` | The max number of players supported. |
 | server.config.multithreading | bool | `true` | Enables the multithreading, allowing the usage of up to 4 cores (needs citation) |

charts/palworld/templates/configmaps.yaml

@@ -48,4 +48,30 @@ data:
   {{- with .Values.server.config.world_parameters }}
   {{- toYaml . | nindent 2  }}
   {{- end }}
-  {{ end }}
+  {{ if .Values.server.config.daily_reboot.enable }}
+  restart-deployment.sh:  |
+    #!/bin/bash
+    cont=$(kubectl -n {{ .Values.namespace }} get pods -o=jsonpath='{.items[?(@.metadata.labels.app\.kubernetes\.io/name=="{{ .Release.Name }}-server")].metadata.name}')
+
+    function exec_rcon_cmd() {
+      kubectl exec -n {{ .Values.namespace }} -i pod/$cont rcon-cli "$1"
+    }
+
+    exec_rcon_cmd "Broadcast Saving_Server_Data..."
+    exec_rcon_cmd save
+    sleep 30
+    exec_rcon_cmd "Broadcast Backing_up_Server_Data..."
+    exec_rcon_cmd backup
+    sleep 30
+
+    step=5
+    for i in $(seq 30 -$step 1); do
+      exec_rcon_cmd "Broadcast Rebooting_in_$i_seconds..."
+      sleep $step
+    done
+
+    exec_rcon_cmd "Shutdown 1"
+    sleep 30
+    kubectl -n {{ .Values.namespace }} rollout restart deployment/{{ .Release.Name }}-server
+  {{ end }}
+  {{ end }}

charts/palworld/templates/cronjob.yaml

@@ -0,0 +1,37 @@
+{{ if .Values.server.config.daily_reboot.enable }}
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: "{{ .Values.server.config.daily_reboot.serviceAccount }}"
+  namespace:  {{ .Values.namespace }}
+spec:
+  concurrencyPolicy:  Forbid
+  schedule: "{{ .Values.server.config.daily_reboot.time }}"
+  jobTemplate:
+    spec:
+      backoffLimit: 1
+      activeDeadlineSeconds:  600
+      template:
+        spec:
+          serviceAccountName: "{{ .Values.server.config.daily_reboot.serviceAccount }}"
+          restartPolicy:  Never
+          containers:
+            - name: kubectl
+              image:  bitnami/kubectl
+              command:
+              - /bin/sh
+              - -c
+              - /restart-script/restart-deployment.sh
+              volumeMounts:
+              - name: restart-script
+                mountPath:  "/restart-script"
+                readOnly: true
+          volumes:
+          - name: restart-script
+            configMap:
+              name: "{{ .Release.Name }}-env-config"
+              defaultMode:  0777
+              items:
+              - key:  "restart-deployment.sh"
+                path: "restart-deployment.sh"
+{{ end }}

charts/palworld/templates/role.yaml

@@ -0,0 +1,14 @@
+{{ if .Values.server.config.daily_reboot.enable }}
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+    name: "{{ .Values.server.config.daily_reboot.role }}"
+    namespace: {{ .Values.namespace }}
+rules:
+    - apiGroups: ["apps", "extensions"]
+      resources: ["deployments", "pods"]
+      verbs: ["get", "patch", "list", "watch"]
+    - apiGroups:  [""]
+      resources:  ["pods/exec", "pods"]
+      verbs:  ["get", "list", "create"]
+{{ end }}

charts/palworld/templates/rolebinding.yaml

@@ -0,0 +1,15 @@
+{{ if .Values.server.config.daily_reboot.enable }}
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: "{{ .Values.server.config.daily_reboot.role }}-binding"
+  namespace: {{ .Values.namespace }}
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: "{{ .Values.server.config.daily_reboot.role }}"
+subjects:
+  - kind: ServiceAccount
+    name: {{ .Values.server.config.daily_reboot.serviceAccount }}
+    namespace: {{ .Values.namespace }}
+{{ end }}

charts/palworld/templates/serviceaccount.yaml

@@ -0,0 +1,7 @@
+{{ if .Values.server.config.daily_reboot.enable }}
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: {{ .Values.server.config.daily_reboot.serviceAccount }}
+  namespace: {{ .Values.namespace }}
+{{ end }}

charts/palworld/values.yaml

@@ -151,6 +151,17 @@ server:
     # -- (string) Update/Install the server when the container starts.
     # THIS HAS TO BE ENABLED THE FIRST TIME YOU RUN THE CONTAINER
     update_on_boot: true
+    daily_reboot:
+    # -- (bool) Enable daily reboot.
+    # Disabled by default
+      enable: false
+      # -- (string) The time (UTC) the server will perform the reboot.
+      # By default, this schedules the restart at 9:30am UTC. Please note, this is using cron syntax.
+      time: "30 9 * * *"
+      # -- (string) The name of the role performing the daily reboot.
+      role: "daily-reboot"
+      # -- (string) The name of the Service Account used to perform the reboot.
+      serviceAccount: "daily-reboot"
     # -- (object) Configures the game world settings.
     # The key:values here should represent in game accepted values.
     # Wrap all values with quotes here to avoid validation issues.

k8s/examples/cronjob-reboot/cm.yaml

@@ -0,0 +1,30 @@
+apiVersion: v1
+kind: ConfigMap
+metadata:
+  name: restart-deployment-configmap
+data:
+  restart-deployment.sh:  |
+    #!/bin/bash
+    cont=$(kubectl -n palworld get pods -o=jsonpath='{.items[?(@.metadata.labels.app=="palworld-server")].metadata.name}')
+
+    function exec_rcon_cmd() {
+      kubectl exec -n palworld -i pod/$cont rcon-cli "$1"
+    }
+
+    exec_rcon_cmd "Broadcast Saving_Server_Data..."
+    exec_rcon_cmd save
+    sleep 30
+    exec_rcon_cmd "Broadcast Backing_up_Server_Data..."
+    kubectl exec -n palworld -i pod/$cont backup
+    sleep 30
+
+    step = 5
+    for i in $(seq 30 -$step 1); do
+      exec_rcon_cmd "Broadcast Rebooting_in_$i_seconds..."
+      sleep $step
+    done
+
+    exec_rcon_cmd "Shutdown 1"
+    sleep 30
+    kubectl -n palworld rollout restart deployment/palworld-server
+

k8s/examples/cronjob-reboot/cronjob.yaml

@@ -0,0 +1,34 @@
+apiVersion: batch/v1
+kind: CronJob
+metadata:
+  name: restart-deployment
+spec:
+  concurrencyPolicy:  Forbid
+  schedule: '30 9 * * *'
+  jobTemplate:
+    spec:
+      backoffLimit: 1
+      activeDeadlineSeconds:  600
+      template:
+        spec:
+          serviceAccountName: restart-deploy
+          restartPolicy:  Never
+          containers:
+            - name: kubectl
+              image:  bitnami/kubectl
+              command:
+              - /bin/sh
+              - -c
+              - /restart-script/restart-deployment.sh
+              volumeMounts:
+              - name: restart-script
+                mountPath:  "/restart-script"
+                readOnly: true
+          volumes:
+          - name: restart-script
+            configMap:
+              name: restart-deployment-configmap
+              defaultMode:  0777
+              items:
+              - key:  "restart-deployment.sh"
+                path: "restart-deployment.sh"

k8s/examples/cronjob-reboot/role.yaml

@@ -0,0 +1,11 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: Role
+metadata:
+    name: restart-deployment
+rules:
+    - apiGroups: ["apps", "extensions"]
+      resources: ["deployments", "pods"]
+      verbs: ["get", "patch", "list", "watch"]
+    - apiGroups:  [""]
+      resources:  ["pods/exec", "pods"]
+      verbs:  ["get", "list", "create"]

k8s/examples/cronjob-reboot/rolebinding.yaml

@@ -0,0 +1,12 @@
+apiVersion: rbac.authorization.k8s.io/v1
+kind: RoleBinding
+metadata:
+  name: restart-deployment
+roleRef:
+  apiGroup: rbac.authorization.k8s.io
+  kind: Role
+  name: restart-deployment
+subjects:
+  - kind: ServiceAccount
+    name: restart-deploy
+    namespace: palworld

k8s/examples/cronjob-reboot/serviceaccount.yaml

@@ -0,0 +1,4 @@
+apiVersion: v1
+kind: ServiceAccount
+metadata:
+  name: restart-deploy

k8s/examples/readme.md

@@ -0,0 +1,9 @@
+# Example CronJob to Reboot Server Daily (9:30am UTC)
+
+Use the following commands to setup the cron job in the namespace palworld:
+
+* `kubectl apply -f cm.yaml`
+* `kubectl apply -f role.yaml`
+* `kubectl apply -f rolebinding.yaml`
+* `kubectl apply -f serviceaccount.yaml`
+* `kubectl apply -f cronjob.yaml`