Golang redis.DialDatabase函數代碼示例

func newPool(server, password string, database int, isRedis bool, maxActive int, wait bool) *redis.Pool {
	return &redis.Pool{
		MaxIdle:     50,
		MaxActive:   maxActive,
		Wait:        wait,
		IdleTimeout: 240 * time.Second,
		Dial: func() (redis.Conn, error) {
			c, err := redis.Dial("tcp", server, redis.DialDatabase(database))
			if err != nil {
				return nil, err
			}
			if password != "" {
				if _, err := c.Do("AUTH", password); err != nil {
					c.Close()
					return nil, err
				}
			}
			if isRedis {
				if _, err := c.Do("CLIENT", "SETNAME", "bosun"); err != nil {
					c.Close()
					return nil, err
				}
			}
			return c, err
		},
	}
}

func (m MRedis) Dial(s string) {
	c, err := redis.Dial("tcp", "127.0.0.1:6379", redis.DialDatabase(2))
	if err != nil {
		panic(err)
	}
	defer c.Close()

}

func testTopologyInRedis(t *testing.T, cfg map[string]interface{}) {
	tests := []struct {
		out  *redisOut
		name string
		ips  []string
	}{
		{nil, "proxy1", []string{"10.1.0.4"}},
		{nil, "proxy2", []string{"10.1.0.9", "fe80::4e8d:79ff:fef2:de6a"}},
		{nil, "proxy3", []string{"10.1.0.10"}},
	}

	db := 0
	index := cfg["index"].(string)
	if v, ok := cfg["db_topology"]; ok {
		db = v.(int)
	}

	// prepare redis
	{
		conn, err := redis.Dial("tcp", getRedisAddr(), redis.DialDatabase(db))
		if err != nil {
			t.Fatalf("redis.Dial failed %v", err)
		}
		// delete old key if present
		defer conn.Close()
		conn.Do("DEL", index)
	}

	// 1. connect
	for i := range tests {
		tests[i].out = newRedisTestingOutput(t, cfg)
		defer tests[i].out.Close()
	}

	// 2. publish ips twice (so all outputs have same topology map)
	for i := 0; i < 2; i++ {
		for _, test := range tests {
			t.Logf("publish %v ips: %v", test.name, test.ips)
			err := test.out.PublishIPs(test.name, test.ips)
			assert.NoError(t, err)
		}
	}

	// 3. check names available
	for _, test := range tests {
		t.Logf("check %v knows ips", test.name)
		for _, other := range tests {
			t.Logf("  check ips of %v", other.name)
			for _, ip := range other.ips {
				name := test.out.GetNameByIP(ip)
				t.Logf("  check ip: %v -> %v", ip, other.name == name)
				assert.Equal(t, other.name, name)
			}
		}
	}
}

func (m MRedis) Set() {
	c, err := redis.Dial("tcp", "192.168.176.3:6379", redis.DialDatabase(3))
	if err != nil {
		panic(err)
	}
	defer c.Close()
	ok, err := redis.String(c.Do("SET", "testkey", "test"))
	if err != nil {
		panic(err)
	}
	fmt.Print(ok)
}

func (m MRedis) Get(s string) {
	c, err := redis.Dial("tcp", "192.168.176.3:6379", redis.DialDatabase(2))
	if err != nil {
		panic(err)
	}
	defer c.Close()
	ok, err := redis.String(c.Do("GET", "service_role_code"))
	if err != nil {
		panic(err)
	}
	fmt.Print(ok)
}

func c_redis_counters(server string, db int) (opentsdb.MultiDataPoint, error) {
	var md opentsdb.MultiDataPoint
	conn, err := redis.Dial("tcp", server, redis.DialDatabase(db))
	if err != nil {
		return md, err
	}
	defer conn.Close()
	if _, err := conn.Do("CLIENT", "SETNAME", "scollector"); err != nil {
		return md, err
	}
	cursor := 0
	for {
		vals, err := redis.Values(conn.Do("HSCAN", collect.RedisCountersKey, cursor))
		if err != nil {
			return md, err
		}
		if len(vals) != 2 {
			return md, fmt.Errorf("Unexpected number of values")
		}
		cursor, err = redis.Int(vals[0], nil)
		if err != nil {
			return md, err
		}
		pairs, err := redis.StringMap(vals[1], nil)
		if err != nil {
			return md, err
		}
		for mts, val := range pairs {
			parts := strings.Split(mts, ":")
			if len(parts) != 2 {
				slog.Errorf("Invalid metric tag set counter: %s", mts)
				continue
			}
			metric := parts[0]
			tags, err := opentsdb.ParseTags(parts[1])
			if err != nil {
				slog.Errorf("Invalid tags: %s", parts[1])
				continue
			}
			v, err := strconv.Atoi(val)
			if err != nil {
				slog.Errorf("Invalid counter value: %s", val)
				continue
			}
			Add(&md, metric, v, tags, metadata.Counter, metadata.Count, "")
		}
		if cursor == 0 {
			break
		}
	}
	return md, nil
}

func c_redis_counters(server string, db int) (opentsdb.MultiDataPoint, error) {
	var md opentsdb.MultiDataPoint
	conn, err := redis.Dial("tcp", server, redis.DialDatabase(db))
	if err != nil {
		return md, slog.Wrap(err)
	}
	defer conn.Close()

	//do a dance to detect proper hscan command for ledis or redis
	hscanCmd := "XHSCAN"
	info, err := redis.String(conn.Do("info", "server"))
	if err != nil {
		return md, slog.Wrap(err)
	}
	if strings.Contains(info, "redis_version") {
		hscanCmd = "HSCAN"
	}

	cursor := "0"
	for {
		vals, err := redis.Values(conn.Do(hscanCmd, collect.RedisCountersKey, cursor))
		if err != nil {
			return md, slog.Wrap(err)
		}
		if len(vals) != 2 {
			return md, fmt.Errorf("Unexpected number of values")
		}
		cursor, err = redis.String(vals[0], nil)
		if err != nil {
			return md, slog.Wrap(err)
		}
		pairs, err := redis.StringMap(vals[1], nil)
		if err != nil {
			return md, slog.Wrap(err)
		}
		for key, val := range pairs {
			ak := models.AlertKey(key)

			v, err := strconv.Atoi(val)
			if err != nil {
				slog.Errorf("Invalid counter value: %s", val)
				continue
			}
			Add(&md, ak.Name(), v, ak.Group(), metadata.Counter, metadata.Count, "")
		}
		if cursor == "" || cursor == "0" {
			break
		}
	}
	return md, nil
}

func (m MRedis) Hmget(s string) {
	c, err := redis.Dial("tcp", "127.0.0.1:6379", redis.DialDatabase(2))
	if err != nil {
		panic(err)
	}
	defer c.Close()
	ok, err := redis.Strings(c.Do("HMGET", "w.pplive.com", "cache_key_without_args", "sorted_src_ip_usability_list"))
	if err != nil {
		panic(err)
	}
	for k, v := range ok {
		fmt.Printf("%d = %s\n", k, v)
	}
}

//連接
func (p *Client_t) Connect(ip string, port uint16, dataBases int) (err error) {
	p.ip = ip
	p.port = port
	p.dataBases = dataBases

	var addr = ip + ":" + strconv.Itoa(int(port))
	dialOption := redis.DialDatabase(dataBases)

	p.Conn, err = redis.Dial("tcp", addr, dialOption)
	if nil != err {
		fmt.Println("######redis.Dial err:", err, ip, port, dataBases)
		return err
	}
	return err
}

func newRedisPool(server string, database int) *redis.Pool {
	return &redis.Pool{
		MaxIdle:     10,
		MaxActive:   10,
		Wait:        true,
		IdleTimeout: 240 * time.Second,
		Dial: func() (redis.Conn, error) {
			c, err := redis.Dial("tcp", server, redis.DialDatabase(database))
			if err != nil {
				return nil, err
			}
			return c, err
		},
	}
}

func (m MRedis) Hgetall(s string) {
	c, err := redis.Dial("tcp", "127.0.0.1:6379", redis.DialDatabase(2))
	if err != nil {
		panic(err)
	}
	defer c.Close()
	ok, err := redis.StringMap(c.Do("HGETALL", "*.pplive.com"))
	if err != nil {
		panic(err)
	}
	for k, v := range ok {
		fmt.Printf("%s = %s\n", k, v)
	}

}

func InitRedis() {
	redisDB := redigo.DialDatabase(config.DatabaseID)
	redisPool = &redigo.Pool{
		MaxIdle:     10,
		IdleTimeout: 1 * time.Second,
		Dial: func() (redigo.Conn, error) {
			return redigo.Dial("tcp", config.RedisServerAndPort, redisDB)
		},
		TestOnBorrow: func(c redigo.Conn, t time.Time) (err error) {
			_, err = c.Do("PING")
			if err != nil {
				panic("Error connecting to redis")
			}
			return
		},
	}
}

func newRedisPool(server string, database int) *redis.Pool {
	return &redis.Pool{
		MaxIdle:     10,
		MaxActive:   10,
		Wait:        true,
		IdleTimeout: 240 * time.Second,
		Dial: func() (redis.Conn, error) {
			c, err := redis.Dial("tcp", server, redis.DialDatabase(database))
			if err != nil {
				return nil, err
			}
			if _, err := c.Do("CLIENT", "SETNAME", metricRoot+"_counters"); err != nil {
				c.Close()
				return nil, err
			}
			return c, err
		},
	}
}

func startRedis() redis.Conn {
	addr := os.Getenv("REDIS_ADDR")
	if addr == "" {
		addr = redisDefaultAddress
	}

	dbIndex, err := strconv.Atoi(os.Getenv("REDIS_DB"))
	if err != nil {
		dbIndex = redisDefaultDDb
	}

	client, err := redis.Dial("tcp", addr, redis.DialDatabase(dbIndex))
	if err != nil {
		panic("Failed to start redis.\n" + err.Error())
	}

	log.Printf("Redis started addr=%s dbIndex=%d.\n", addr, dbIndex)

	return client
}

// NewPool creates a redis pool connected to the given host:port and db.
func NewPool(host string, port, db uint) (*Wredis, error) {
	if host == "" {
		return nil, errors.New("host cannot be empty")
	}
	if port == 0 {
		return nil, errors.New("port cannot be 0")
	}
	addr := fmt.Sprintf("%s:%d", host, int(port))
	pool := &redis.Pool{
		MaxIdle:     3,
		IdleTimeout: 240 * time.Second,
		Dial: func() (redis.Conn, error) {
			return redis.Dial("tcp", addr, redis.DialDatabase(int(db)))
		},
		TestOnBorrow: func(c redis.Conn, t time.Time) error {
			_, err := c.Do("PING")
			return err
		},
	}
	return &Wredis{pool, true}, nil
}