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Name

rcluster - lua redis cluster client driver

Table of Contents

Description

The lua library is a redis client driver that support redis cluster

The library takes advantage of https://github.com/openresty/lua-resty-redis and luacrc16 :

Note: Recommended to use the lua library in openresty environment

Install

The following steps assume that the openresty environment have been ok and the installation path is /usr/local/openresty/

Compile luacrc16

git clone https://github.com/youlu-cn/luacrc16.git
cd luacrc16
gcc crc16.c -fPIC -shared -o crc16.so
mv crc16.so /usr/local/openresty/lualib/

Note:

  • If prompted lua.h lualib.h lauxlib.h does not exist when compiling, modify the crc16.c include path to absolute path.
-- modify before
#include <lua.h>
#include <lualib.h>
#include <lauxlib.h>

-- modify after
#include </usr/local/openresty/luajit/include/luajit-2.1/lua.h>
#include </usr/local/openresty/luajit/include/luajit-2.1/lualib.h>
#include </usr/local/openresty/luajit/include/luajit-2.1/lauxlib.h>
  • If the server has multiple luajit environment, recommended to use the openresty luajit.

  • Paste the generated crc16.so to the lua_package_cpath supported directory (there paste to /usr/local/openresty/lualib/).

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Install rcluster

git clone https://github.com/standsun/rcluster.lua.git
cd rcluster.lua
mv rcluster.lua /usr/local/openresty/lualib/resty/rcluster.lua

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Methods

  • Rcluster:new(cfg)
  • Rcluster:init_pipeline()
  • Rcluster:cancel_pipeline()
  • Rcluster:commit_pipeline()
  • Redis single key operation method, see agentzh's lua-resty-redis#methods
-- copy from redis.lua

local common_cmds = {
    "get",      "set",          "mget",     "mset",
    "del",      "incr",         "decr",                 -- Strings
    "llen",     "lindex",       "lpop",     "lpush",
    "lrange",   "linsert",                              -- Lists
    "hexists",  "hget",         "hset",     "hmget",
    --[[ "hmset", ]]            "hdel",                 -- Hashes
    "smembers", "sismember",    "sadd",     "srem",
    "sdiff",    "sinter",       "sunion",               -- Sets
    "zrange",   "zrangebyscore", "zrank",   "zadd",
    "zrem",     "zincrby",                              -- Sorted Sets
    "auth",     "eval",         "expire",   "script",
    "sort"                                              -- Others
}

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Example

Init

local rcluster = require 'resty.rcluster'

local redis = rcluster:new({
    --name                = "myproject",  -- optional, default value: default
    --auth                = 'password',   -- optional, default value: nil
    --timeout             = 1000,         -- optional, default value: 3000 ms
    --keep_time           = 10000,        -- optional, default value: 10000 ms
    --keep_size           = 100,          -- optional, default value: 100
    server  = {                           -- required
        { host = "192.168.0.11", port = 6525 },
        { host = "192.168.0.12", port = 6525 },
        { host = "192.168.0.13", port = 6525 },
    }
})

Operate a key

local res,err = redis:hget("user_info_1000","username")

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Operate multiple keys

redis:init_pipeline()

redis:hget("user_info_1000","username")
redis:hset("user_info_1000","username","standsun")
redis:hget("user_info_1002","username")

local res,err = redis:commit_pipeline()

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Issues

Todo

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