【ただのメモ】CoderでGemini動かすためのTemplate設定

• main.tf

terraform {
  required_providers {
    coder = { source = "coder/coder" }
    docker = {
      source  = "kreuzwerker/docker"
      version = "~> 3.0"
    }
  }
}

variable "docker_socket" {
  default     = ""
  description = "(Optional) Docker socket URI"
  type        = string
}

provider "docker" {
  host = var.docker_socket != "" ? var.docker_socket : null
}

data "coder_provisioner" "me" {}
data "coder_workspace" "me" {}
data "coder_workspace_owner" "me" {}

resource "coder_agent" "main" {
  arch = data.coder_provisioner.me.arch
  os   = "linux"
  
  startup_script = <<-EOT
    set -e

    # 1. フォルダ作成と初期化
    WORKSPACE_DIR="/home/coder/${data.coder_workspace.me.name}"
    mkdir -p "$WORKSPACE_DIR"
    if [ ! -f ~/.init_done ]; then
      cp -rT /etc/skel ~
      touch ~/.init_done
    fi

    # 2. code-server の準備待ち
    until command -v code-server >/dev/null 2>&1; do sleep 1; done
    
    # 3. Gemini (Cloud Code) のインストール
    code-server --install-extension googlecloudtools.cloudcode

    # 4. Google Cloud CLI (gcloud) のインストール
    if ! command -v gcloud >/dev/null 2>&1; then
      echo "Installing Google Cloud CLI..."
      curl https://sdk.cloud.google.com | bash -s -- --disable-prompts --install-dir=/tmp
      echo 'export PATH=$PATH:/tmp/google-cloud-sdk/bin' >> ~/.bashrc
      export PATH=$PATH:/tmp/google-cloud-sdk/bin
    fi

    # 5. settings.json への設定注入
    SETTINGS_PATH="$HOME/.local/share/code-server/User/settings.json"
    mkdir -p "$(dirname "$SETTINGS_PATH")"
    python3 -c "
import json, os
path = '$SETTINGS_PATH'
new_data = {
    'geminicodeassist.project': 'platinum-pager-481412-h6',
    'cloudcode.project': 'platinum-pager-481412-h6',
    
    # Gemini UI 最適化
    'google.cloud.code.gemini.chat.agent.visible': True,
    'google.cloud.code.gemini.chat.suggestions.visible': False,
    'google.cloud.code.gemini.chat.defaultCodeBlockDisplay': 'Expanded',
    # 「Prompts to try」を消し去るための最新設定キーたち
    'geminicodeassist.chat.suggestions.visible': False,       # 拡張機能 google.geminicodeassist 用
    #'google.cloud.code.gemini.chat.onboarding.visible': False,  # オンボーディング表示
    'google.cloud.code.gemini.chat.samplePrompts.visible': False, # サンプルプロンプト
    'google.cloud.code.gemini.chat.suggestions.visible': False, # 念のためこれも（旧 Cloud Code 用）
    
    # Copilot は「削除」ではなく「設定」で封鎖
    'chat.defaultProvider': 'google.cloud.code.gemini',
    'chat.disableAIFeatures': True,
    'github.copilot.enable': {'*': False},
    'github.copilot.chat.enable': False,

    'workbench.colorTheme': 'Default Dark Modern',
    'terminal.integrated.copyOnSelection': True,
    'http.systemCertificatesNode': True
}
data = json.load(open(path)) if os.path.exists(path) and os.path.getsize(path) > 0 else {}
data.update(new_data)
with open(path, 'w') as f:
    json.dump(data, f, indent=4)
"
  EOT
}

# --- 永続ボリューム (image_3f4172.png のエラーを解消) ---
resource "docker_volume" "home_volume" {
  # $$ を $ に戻しました。これで Terraform が正しく値を埋め込みます
  name = "coder-${data.coder_workspace.me.id}-home"
}

# --- ワークスペースコンテナ ---
resource "docker_container" "workspace" {
  count = data.coder_workspace.me.start_count
  image = "codercom/enterprise-base:ubuntu"
  name  = "coder-${data.coder_workspace_owner.me.name}-${lower(data.coder_workspace.me.name)}"
  
  volumes {
    container_path = "/home/coder"
    volume_name    = docker_volume.home_volume.name
  }
  volumes {
    host_path      = "/var/run/docker.sock"
    container_path = "/var/run/docker.sock"
  }

  host {
    host = "host.docker.internal"
    ip   = "host-gateway"
  }

  entrypoint = [
    "sh", "-c",
    <<-EOT
    set -e
    OS_TYPE=$(uname -s | tr '[:upper:]' '[:lower:]')
    ARCH_TYPE=$(uname -m)
    case "$ARCH_TYPE" in
      x86_64)  CODER_ARCH="amd64" ;;
      aarch64|arm64) CODER_ARCH="arm64" ;;
      *)       echo "Unsupported arch: $ARCH_TYPE"; exit 1 ;;
    esac
    curl -fsSL "http://host.docker.internal/bin/coder-$OS_TYPE-$CODER_ARCH" -o /tmp/coder
    chmod +x /tmp/coder
    /tmp/coder agent --auth token --agent-token $CODER_AGENT_TOKEN --agent-url http://host.docker.internal
    EOT
  ]

  env = [
    "CODER_AGENT_TOKEN=${coder_agent.main.token}"
  ]
}

module "code-server" {
  source   = "registry.coder.com/coder/code-server/coder"
  agent_id = coder_agent.main.id
  folder   = "/home/coder/${data.coder_workspace.me.name}"
}