sonic redis模块学习

redis做为sonic的存储数据库，基于redis 的特性，可以满足sonic的数据驱动，快速响应。
这个文件sonic-buildimage/dockers/docker-database/database_config.json.j2 定义了redis在sonic中应用的数据库。
基本功能与其他nosql区别并不大， 简单教程如下 https://www.runoob.com/redis/redis-lists.html
redis-server 启动server， redis-cli客户端连接server,实现交互， 当然还有丰富的restfulapi实现。

{
    "INSTANCES": {
        "redis":{
            "hostname" : "{{HOST_IP}}",
            "port" : 6379,
            "unix_socket_path" : "/var/run/redis{{NAMESPACE_ID}}/redis.sock",
            "persistence_for_warm_boot" : "yes"
        }
    },
    "DATABASES" : {
        "APPL_DB" : {
            "id" : 0,
            "separator": ":",
            "instance" : "redis"
        },
        "ASIC_DB" : {
            "id" : 1,
            "separator": ":",
            "instance" : "redis"
        },
        "COUNTERS_DB" : {
            "id" : 2,
            "separator": ":",
            "instance" : "redis"
        },
        "LOGLEVEL_DB" : {
            "id" : 3,
            "separator": ":",
            "instance" : "redis"
        },
        "CONFIG_DB" : {
            "id" : 4,
            "separator": "|",
            "instance" : "redis"
        },
        "PFC_WD_DB" : {
            "id" : 5,
            "separator": ":",
            "instance" : "redis"
        },
        "FLEX_COUNTER_DB" : {
            "id" : 5,
            "separator": ":",
            "instance" : "redis"
        },
        "STATE_DB" : {
            "id" : 6,
            "separator": "|",
            "instance" : "redis"
        },
        "SNMP_OVERLAY_DB" : {
            "id" : 7,
            "separator": "|",
            "instance" : "redis"
        },
        "RESTAPI_DB" : {
            "id" : 8,
            "separator": "|",
            "instance" : "redis"
        }
    },
    "VERSION" : "1.0"
}

redis-cli 常用命令
select (int） 进去不同index的数据库
keys * 查询所有的key