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Kubernetes examples

The following examples show how to setup the bot application using Kubernetes. As discussed in the README, configuration can be done in a variety of ways. These examples will use environment variables for configuration, but feel free to use appsettings.yaml, command line arguments, other file types or the config directory.

Bot application

This example shows how to run the bot application using Kubernetes. This is just a simple example, using basic resources. Feel free to template and deploy to Kubernetes as you see fit.

kubernetes.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: server-manager-discord-bot
  namespace: server-manager-discord-bot
spec:
  selector:
    matchLabels:
      app: server-manager-discord-bot
  template:
    metadata:
      labels:
        app: server-manager-discord-bot
    spec:
      serviceAccountName: server-manager-discord-bot
      containers:
        - name: server-manager-discord-bot
          image: ghcr.io/cruikshj/server-manager-discord-bot
          env:
            - name: SERVERMANAGER_BotToken
              value: "<bottoken>"
            - name: SERVERMANAGER_ServerInfoProviders__0__Type
              value: "KubernetesConfigMap"
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: server-manager-discord-bot
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: server-manager-discord-bot
rules:
- apiGroups:
  - ""
  resources:
  - configmaps
  verbs:
  - get
  - list
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: server-manager-discord-bot
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: server-manager-discord-bot
subjects:
- kind: ServiceAccount
  name: server-manager-discord-bot
  namespace: server-manager-discord-bot
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: my-servers-config
  namespace: whereever
  labels:
    server-manager: default
data:
  "minecraft-1": |
    Game: Minecraft (Bedrock)
    Icon: https://cdn2.steamgriddb.com/icon_thumb/4a5b76e7170df685ed8b75c7dacce268.png
    Fields:
      Address: example.com:12345
      Mode: Survival
  "minecraft-2": |
    Game: Minecraft (Java)
    Icon: https://cdn2.steamgriddb.com/icon_thumb/4a5b76e7170df685ed8b75c7dacce268.png
    Fields:
      Address: example.com:54321
      Mode: Creative
      Version: 1.12.2
    Readme: |
      # Minecraft
      This is a Minecraft server.

Kubernetes integration

This example expands on the above example to show how the bot can manage dedicated servers using Kubernetes.

kubernetes.yaml

apiVersion: apps/v1
kind: Deployment
metadata:
  name: server-manager-discord-bot
  namespace: server-manager-discord-bot
spec:
  selector:
    matchLabels:
      app: server-manager-discord-bot
  template:
    metadata:
      labels:
        app: server-manager-discord-bot
    spec:
      serviceAccountName: server-manager-discord-bot
      containers:
        - name: server-manager-discord-bot
          image: ghcr.io/cruikshj/server-manager-discord-bot
          env:
            - name: SERVERMANAGER_BotToken
              value: "<bottoken>"
            - name: SERVERMANAGER_ServerInfoProviders__0__Type
              value: "KubernetesConfigMap"
            - name: SERVERMANAGER_ServerHostAdapters__Kubernetes__Type
              value: "Kubernetes"
---
apiVersion: v1
kind: ServiceAccount
metadata:
  name: server-manager-discord-bot
---
kind: ClusterRole
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: server-manager-discord-bot
rules:
rules:
- apiGroups:
  - ""
  resources:
  - configmaps
  verbs:
  - get
  - list
- apiGroups:
  - ""
  resources:
  - pods
  - pods/log
  verbs:
  - get
  - list
- apiGroups:
  - apps
  resources:
  - deployments
  - deployments/status
  verbs:
  - get
- apiGroups:
  - apps
  resources:
  - deployments/scale
  verbs:
  - get
  - patch
---
kind: ClusterRoleBinding
apiVersion: rbac.authorization.k8s.io/v1
metadata:
  name: server-manager-discord-bot
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: server-manager-discord-bot
subjects:
- kind: ServiceAccount
  name: server-manager-discord-bot
  namespace: server-manager-discord-bot
---
apiVersion: v1
kind: ConfigMap
metadata:
  name: my-servers-config
  namespace: whereever
  labels:
    server-manager: default
data:
  "minecraft-1": |
    Game: Minecraft (Bedrock)
    Icon: https://cdn2.steamgriddb.com/icon_thumb/4a5b76e7170df685ed8b75c7dacce268.png
    Fields:
      Address: example.com:12345
      Mode: Survival
    HostAdapter: Kubernetes
    HostProperties:
      Kind: Deployment
      Namespace: minecraft-1
      Name: minecraft-1
  "minecraft-2": |
    Game: Minecraft (Java)
    Icon: https://cdn2.steamgriddb.com/icon_thumb/4a5b76e7170df685ed8b75c7dacce268.png
    Fields:
      Address: example.com:54321
      Mode: Creative
      Version: 1.12.2
    Readme: |
      # Minecraft
      This is a Minecraft server.
    HostAdapter: Kubernetes
    HostProperties:
      Kind: Deployment
      Namespace: minecraft-2
      Name: minecraft-2