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MetaLab/internal/common/redis.go
Victor_Jay 3e26431602 fix: Redis 降级机制优化:启动离线不崩溃 + 操作级即时降级 + 快速恢复
- 启动时 Redis 不可达不再 Fatal 退出,降级为内存模式继续运行
- FallbackStore 改为操作级降级:Redis 操作失败立即切换到内存,不依赖周期健康检查
- 新增 recoveryLoop:降级后每 5s 轮询尝试恢复,恢复后自动迁移内存会话回 Redis
- 健康检查与清理解耦:检查 30s 间隔,恢复轮询 5s 间隔(原 300s)
- 优化 go-redis 连接池参数(DialTimeout 1s, MaxRetries 1,减少故障阻塞时间)
2026-05-31 12:14:10 +08:00

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package common
import (
"context"
"fmt"
"log"
"time"
"github.com/redis/go-redis/v9"
"metazone.cc/metalab/internal/config"
)
// NewRedisClient 创建 Redis 客户端并尝试验证连接
// Redis 不可达时不返回错误,而是返回 clientgo-redis 自带自动重连),由调用方决定降级策略
func NewRedisClient(cfg config.RedisConfig) (*redis.Client, error) {
client := redis.NewClient(&redis.Options{
Addr: fmt.Sprintf("%s:%s", cfg.Host, cfg.Port),
Password: cfg.Password,
DB: cfg.DB,
DialTimeout: 1 * time.Second, // 连接超时降低(默认 5s配合 FallbackStore 快速降级
ReadTimeout: 1 * time.Second,
WriteTimeout: 1 * time.Second,
MaxRetries: 1, // 最多重试 1 次(默认 3 次),减少故障阻塞时间
PoolSize: 5, // 会话存储不需要大连接池(默认 10*GOMAXPROCS
})
ctx, cancel := context.WithTimeout(context.Background(), 5*time.Second)
defer cancel()
if err := client.Ping(ctx).Err(); err != nil {
log.Printf("[Redis] 连接失败: %v将降级为内存存储", err)
return client, fmt.Errorf("Redis 连接失败: %w", err)
}
return client, nil
}