Migrate minecraft to Paper (#37)

I want to configure monitoring for Minecraft, and it's not possible with the Vanilla version. So we're testing Paper

Reviewed-on: https://git.badhouseplants.net/badhouseplants/k8s-cluster-config/pulls/37

badhouseplants/values/values.minecraft.yaml

@@ -1,3 +1,18 @@
+---
+# --------------------------------------------------
+# -- Extensions values
+# --------------------------------------------------
+service-account:
+  enabled: true
+  resources:
+    - name: minecraft-exporter
+      label:
+        app: minecraft-minecraft-metrics
+      endpoints:
+        port: metrics
+# --------------------------------------------------
+# -- Main values
+# --------------------------------------------------
 resources:
   requests:
     memory: 512Mi
@@ -8,11 +23,48 @@ minecraftServer:
   difficulty: hard
   hardcore: true
   version: 1.19.2
+  type: "PAPER"
+  paperDownloadUrl: >
+    https://api.papermc.io/v2/projects/paper/versions/1.19.2/builds/307/downloads/paper-1.19.2-307.jar
   gameMode: survival
-  motd: "Suck my cock"
   pvp: true
   memory: 4096M
+  extraPorts:
+    - name: metrics
+      containerPort: 9225
+      protocol: TCP
+      service:
+        enabled: true
+        embedded: false
+        labels: 
+          exporter: minecraft
+        type: ClusterIP
+        port: 9925
+      ingress:
+        enabled: false
 persistence:
   dataDir:
     enabled: true
     Size: 8Gi
+initContainers:
+  - name: install-prometheus-exporter
+    image: alpine/curl
+    command:
+      - curl
+      - -L
+      - "https://github.com/sladkoff/minecraft-prometheus-exporter/releases/download/v2.5.0/minecraft-prometheus-exporter-2.5.0.jar"
+      - -o
+      - /data/plugins/prometheus-exporter.jar
+    volumeMounts:
+      - name: plugins
+        mountPath: /data/plugins
+        readOnly: false
+extraVolumes:
+  - volumeMounts:
+      - name: plugins
+        mountPath: /data/plugins
+        readOnly: false
+    volumes:
+      - name: plugins
+        emptyDir:
+          sizeLimit: 500Mi

common/values.service-monitor.yaml

@@ -0,0 +1,16 @@
+---
+service-monitor:
+  templates: 
+    - | 
+      {{ range .Values.service-monitor.resources }}
+      apiVersion: monitoring.coreos.com/v1
+      kind: ServiceMonitor
+      metadata:
+        name: {{ .name }}
+      spec:
+        selector:
+          matchLabels:
+            app: {{ .label.app }}
+        endpoints:
+          - port: {{ .endpoints.port }}
+      {{ end }}

releases.yaml

@@ -43,6 +43,13 @@ templates:
       - chart: bedag/raw
         version: 2.0.0
         alias: istio
+  service-monitor:
+    dependencies:
+      - chart: bedag/raw
+        version: 2.0.0
+        alias: service-monitor
+    values:
+      - '{{ requiredEnv "PWD" }}/common/values.service-monitor.yaml'
   namespace:
     dependencies:
       - chart: bedag/raw
@@ -160,6 +167,7 @@ templates:
     version: 4.6.0
     inherit:
       - template: default-env-values
+        #      - template: service-monitor
 
   gitea: &gitea
     name: gitea