redis 主从

redis主从:

```python
# 进入桌面conf目录 创建两个配置文件, 内容如下:

# redis.conf
daemonize yes
pidfile ./redis-server.pid
port 6377
bind 10.211.55.15


# slave.conf
daemonize yes
pidfile ./redis-server-slave.pid
port 6378
bind 10.211.55.15
slaveof 10.211.55.15 6377
```

```python
# 启动 主/从 redis服务
redis-server redis.conf
redis-server slave.conf

# 测试主从读写
redis-cli -h 10.211.55.15 -p 6377
set/get

redis-cli -h 10.211.55.15 -p 6378
get        # 无法set

# django中使用:
# 配置
CACHES = {
    "write": {  # 主服务
        "BACKEND": "django_redis.cache.RedisCache",
        "LOCATION": "redis://10.211.55.15:6377/10",
        "OPTIONS": {
            "CLIENT_CLASS": "django_redis.client.DefaultClient",
        }
    },
    "read": {  # 从服务
        "BACKEND": "django_redis.cache.RedisCache",
        "LOCATION": "redis://10.211.55.15:6378/10",
        "OPTIONS": {
            "CLIENT_CLASS": "django_redis.client.DefaultClient",
        }
    },
}

# 测试
from django_redis import get_redis_connection
w_client = get_redis_connection('write')
r_client = get_redis_connection('read')
```