start-ha.sh

#!/bin/bash

# 案件處理系統 HA 架構啟動腳本
# High Availability Architecture Startup Script

set -e

# 顏色定義
RED='\033[0;31m'
GREEN='\033[0;32m'
YELLOW='\033[1;33m'
BLUE='\033[0;34m'
NC='\033[0m' # No Color

# 打印帶顏色的消息
print_info() {
    echo -e "${BLUE}[INFO]${NC} $1"
}

print_success() {
    echo -e "${GREEN}[SUCCESS]${NC} $1"
}

print_warning() {
    echo -e "${YELLOW}[WARNING]${NC} $1"
}

print_error() {
    echo -e "${RED}[ERROR]${NC} $1"
}

# 打印標題
echo "=========================================="
echo "  案件處理系統 - HA 架構部署"
echo "  Case Processing System - HA Deployment"
echo "=========================================="
echo ""

# 檢查 Docker 是否安裝
print_info "檢查 Docker 環境..."
if ! command -v docker &> /dev/null; then
    print_error "Docker 未安裝，請先安裝 Docker"
    exit 1
fi

if ! command -v docker-compose &> /dev/null; then
    print_error "Docker Compose 未安裝，請先安裝 Docker Compose"
    exit 1
fi

print_success "Docker 環境檢查通過"
echo ""

# 檢查必要的文件
print_info "檢查配置文件..."
if [ ! -f "docker-compose-ha.yml" ]; then
    print_error "找不到 docker-compose-ha.yml 文件"
    exit 1
fi

if [ ! -f "nginx/nginx.conf" ]; then
    print_error "找不到 nginx/nginx.conf 文件"
    exit 1
fi

print_success "配置文件檢查通過"
echo ""

# 檢查 Docker 鏡像
print_info "檢查 Docker 鏡像..."
if ! docker images | grep -q "case-api"; then
    print_warning "case-api 鏡像不存在，開始構建..."
    docker build -f Dockerfile.api -t case-api:latest .
    print_success "case-api 鏡像構建完成"
fi

if ! docker images | grep -q "case-worker"; then
    print_warning "case-worker 鏡像不存在，開始構建..."
    docker build -f Dockerfile.worker -t case-worker:latest .
    print_success "case-worker 鏡像構建完成"
fi

print_success "Docker 鏡像檢查通過"
echo ""

# 停止舊的服務
print_info "檢查並停止舊的服務..."
if docker-compose -f docker-compose-simple.yml ps -q 2>/dev/null | grep -q .; then
    print_warning "發現運行中的簡化版服務，正在停止..."
    docker-compose -f docker-compose-simple.yml down
    print_success "簡化版服務已停止"
fi

if docker-compose -f docker-compose-ha.yml ps -q 2>/dev/null | grep -q .; then
    print_warning "發現運行中的 HA 服務，正在停止..."
    docker-compose -f docker-compose-ha.yml down
    print_success "HA 服務已停止"
fi
echo ""

# 啟動 HA 服務
print_info "啟動 HA 架構服務..."
print_info "組件清單:"
echo "  - Nginx 負載均衡器: 1 個實例"
echo "  - API 服務器: 3 個實例"
echo "  - Worker 處理器: 5 個實例"
echo "  - Redis Master: 1 個實例"
echo "  - Redis Replica: 2 個實例"
echo ""

docker-compose -f docker-compose-ha.yml up -d

print_success "HA 服務啟動成功"
echo ""

# 等待服務啟動
print_info "等待服務啟動完成（15 秒）..."
for i in {15..1}; do
    echo -ne "  剩餘 $i 秒...\r"
    sleep 1
done
echo ""

# 檢查服務狀態
print_info "檢查服務狀態..."
echo ""

# 統計運行中的容器
api_count=$(docker ps --filter "name=case-api" --format "{{.Names}}" | wc -l)
worker_count=$(docker ps --filter "name=case-worker" --format "{{.Names}}" | wc -l)
redis_count=$(docker ps --filter "name=case-redis" --format "{{.Names}}" | wc -l)
nginx_count=$(docker ps --filter "name=case-nginx" --format "{{.Names}}" | wc -l)

echo "  ✓ API 實例: $api_count/3"
echo "  ✓ Worker 實例: $worker_count/5"
echo "  ✓ Redis 實例: $redis_count/3"
echo "  ✓ Nginx 實例: $nginx_count/1"
echo ""

# 測試 API 健康狀態
print_info "測試 API 健康狀態..."
if curl -s -f http://localhost:8888/api/v1/health > /dev/null 2>&1; then
    print_success "API 健康檢查通過"
    
    # 顯示詳細健康狀態
    health_status=$(curl -s http://localhost:8888/api/v1/health)
    echo ""
    echo "健康狀態詳情:"
    echo "$health_status" | python3 -m json.tool 2>/dev/null || echo "$health_status"
else
    print_warning "API 健康檢查失敗，可能需要更多時間啟動"
fi
echo ""

# 顯示訪問信息
echo "=========================================="
echo "  🎉 HA 架構部署完成！"
echo "=========================================="
echo ""
echo "📋 服務訪問地址:"
echo ""
echo "  🌐 前端測試界面"
echo "     http://localhost:8888"
echo ""
echo "  📊 監控儀表板"
echo "     http://localhost:8888/dashboard.html"
echo ""
echo "  📈 Nginx 狀態頁"
echo "     http://localhost:8889/status"
echo ""
echo "  🔌 API 端點"
echo "     http://localhost:8888/api/v1/health"
echo "     http://localhost:8888/api/v1/cases"
echo ""
echo "📝 常用命令:"
echo ""
echo "  # 查看服務狀態"
echo "  docker-compose -f docker-compose-ha.yml ps"
echo ""
echo "  # 查看日誌"
echo "  docker-compose -f docker-compose-ha.yml logs -f"
echo ""
echo "  # 停止服務"
echo "  docker-compose -f docker-compose-ha.yml down"
echo ""
echo "  # 擴展 Worker 數量"
echo "  docker-compose -f docker-compose-ha.yml up -d --scale worker=10"
echo ""
echo "🧪 HA 容錯測試:"
echo ""
echo "  # 停止一個 API 實例（測試容錯）"
echo "  docker stop case-api-1"
echo ""
echo "  # 重啟 API 實例（測試恢復）"
echo "  docker start case-api-1"
echo ""
echo "  # 查看負載均衡日誌"
echo "  docker logs case-nginx | grep upstream"
echo ""
echo "=========================================="
echo ""

print_success "部署完成！請使用瀏覽器訪問 http://localhost:8888 進行測試"
echo ""