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codis安装部署

codis安装部署

作者: volkin | 来源:发表于2018-06-26 16:06 被阅读426次

    codis架构

    codis架构图

    Codis组件

    Codis 3.x 由以下组件组成:

    • Codis FE:集群管理界面

      • 多个集群实例共享可以共享同一个前端展示页面;
      • 通过配置文件管理后端 codis-dashboard 列表,配置文件可自动更新。
    • Codis Dashboard:集群管理工具,支持 codis-proxy、codis-server 的添加、删除,以及据迁移等操作。在集群状态发生改变时,codis-dashboard 维护集群下所有 codis-proxy 的状态的一致性。

      • 对于同一个业务集群而言,同一个时刻 codis-dashboard 只能有 0个或者1个;
      • 所有对集群的修改都必须通过 codis-dashboard 完成。
    • redis-sentinel:redis类似的高可用机制支持自动主从切换(HA)

    • Storage: 外部存储(注册中心)例如FileSystem、ETCD、Zookeeper

    • Codis Proxy:客户端连接的 Redis 代理服务, 实现了 Redis 协议。 除部分命令不支持以外,表现的和原生的 Redis 没有区别(就像 Twemproxy)。

      • 对于同一个业务集群而言,可以同时部署多个 codis-proxy 实例;
      • 不同 codis-proxy 之间由 codis-dashboard 保证状态同步。
    • Codis-Group: 没有对应的组件,而是一个虚拟的节点机制通过槽位映射机制实现proxy与server的映射

    • Codis Server(Codis Redis):基于 redis-3.2.8 分支开发。增加了额外的数据结构,以支持 slot 有关的操作以及数据迁移指令。
    • Codis Admin:集群管理的命令行工具。

      • 可用于控制 codis-proxy、codis-dashboard 状态以及访问外部存储。

    Codis集群启动

    Codis集群启动需要zookeeper或者etcd,我们以zookeeper为例,搭建Codis集群。

    关于zookeeper的配置,可以参考zookeeper安装部署

    我们使用3台主机搭建集群环境
    配置如下:

    hostName ip
    vc0 192.168.4.50
    vc1 192.168.4.51
    vc2 192.168.4.52

    vc0-1分别配置环境变量,在~/.bashrc中增加

    export CODIS_HOME=/storage/dep/go/src/github.com/CodisLabs/codis
    export PATH=$PATH:$CODIS_HOME/bin
    
    

    启动 Codis Dashboard

    使用vc0作为主机,修改vc0的Codis Dashboard配置文件vim /storage/dep/go/src/github.com/CodisLabs/codis/config/dashboard.toml

    
    
    ##################################################
    #                                                #
    #                  Codis-Dashboard               #
    #                                                #
    ##################################################
    
    # Set Coordinator, only accept "zookeeper" & "etcd" & "filesystem".
    # for zookeeper/etcd, coorinator_auth accept "user:password" 
    # Quick Start
    coordinator_name = "zookeeper"
    coordinator_addr = "192.168.4.50:2181,192.168.4.51:2181,192.168.4.52:2181"
    #coordinator_auth = ""
    
    # Set Codis Product Name/Auth.
    product_name = "codis-nasa"
    product_auth = ""
    
    # Set bind address for admin(rpc), tcp only.
    admin_addr = "0.0.0.0:18080"
    
    # Set arguments for data migration (only accept 'sync' & 'semi-async').
    migration_method = "semi-async"
    migration_parallel_slots = 100
    migration_async_maxbulks = 200
    migration_async_maxbytes = "32mb"
    migration_async_numkeys = 500
    migration_timeout = "30s"
    
    # Set configs for redis sentinel.
    sentinel_client_timeout = "10s"
    sentinel_quorum = 2
    sentinel_parallel_syncs = 1
    sentinel_down_after = "30s"
    sentinel_failover_timeout = "5m"
    sentinel_notification_script = ""
    sentinel_client_reconfig_script = ""
    
    
    

    重点修改的参数有

    • coordinator_name
      • 外部存储类型,接受 zookeeper/etcd,本例使用zookeeper
    • coordinator_addr
      • 外部存储地址,使用zookeeper集群的客户端暴露访问地址,以逗号分开
    • product_name
      • 区分不同的集群,注册到zookeeper也是用这个区分 ,根据自己需求起名
    • admin_addr
      • 用于dashboard与codas-proxy,codis-server进行tcp通信

    使用命令nohup codis-dashboard --ncpu=1 --config=/storage/dep/go/src/github.com/CodisLabs/codis/config/dashboard.toml --log=/storage/dep/go/src/github.com/CodisLabs/codis/log/dashboard.log --log-level=WARN & 启动

    其中:
    --ncpu=N 最大使用 CPU 个数
    -c CONF, --config=CONF 指定启动配置文件
    -l FILE, --log=FILE 设置 log 输出文件
    --log-level=LEVEL 设置 log 输出等级:INFO,WARN,DEBUG,ERROR;默认INFO,推荐WARN

    执行后查看日志 tail -100f /storage/dep/go/src/github.com/CodisLabs/codis/log/dashboard.log.2018-06-25,得到输出

    2018/06/25 17:12:36 main.go:78: [WARN] set ncpu = 1
    2018/06/25 17:12:36 topom.go:119: [WARN] create new topom:
    {
        "token": "cf7a714f4756eec383928d11c2899196",
        "start_time": "2018-06-25 17:12:36.761816028 +0800 CST",
        "admin_addr": "vc0:18080",
        "product_name": "codis-nsa",
        "pid": 5364,
        "pwd": "/storage/dep/go/src/github.com/CodisLabs/codis/log",
        "sys": "Linux vc0 3.10.0-693.el7.x86_64 #1 SMP Tue Aug 22 21:09:27 UTC 2017 x86_64 x86_64 x86_64 GNU/Linux"
    }
    2018/06/25 17:12:36 main.go:142: [WARN] create topom with config
    coordinator_name = "zookeeper"
    coordinator_addr = "192.168.4.50:2181,192.168.4.51:2181,192.168.4.52:2181"
    coordinator_auth = ""
    admin_addr = "0.0.0.0:18080"
    product_name = "codis-nsa"
    product_auth = ""
    
    
    ......
    ......
    
    
    2018/06/25 17:12:37 topom_sentinel.go:169: [WARN] rewatch sentinels = []
    2018/06/25 17:12:37 main.go:179: [WARN] [0xc4202bed80] dashboard is working ...
    2018/06/25 17:12:37 topom.go:429: [WARN] admin start service on [::]:18080
    
    

    观察日志输出发现Codis Dashboard已经按照配置正常启动

    启动 Codis PROXY

    配置文件如下:

    product_name = "codis-nasa" # 集群名称,同codis-dashboard中配置
    product_auth = "" #集群密码
    
    session_auth = ""
    
    # Set bind address for admin(rpc), tcp only.
    admin_addr = "0.0.0.0:11080"  # 用于和codis-dashboard进行tcp通信同步信息
    
    # Set bind address for proxy, proto_type can be "tcp", "tcp4", "tcp6", "unix" or "unixpacket".
    proto_type = "tcp4" #端口协议类型
    proxy_addr = "0.0.0.0:19000"  #用于redis客户端连接,支持redis协议,端口唯一
    
    jodis_name = ""
    jodis_addr = ""
    jodis_auth = ""
    jodis_timeout = "20s"
    jodis_compatible = false
    
    # Set datacenter of proxy.
    proxy_datacenter = ""
    
    # Set max number of alive sessions.
    proxy_max_clients = 1000
    
    # Set max offheap memory size. (0 to disable)
    proxy_max_offheap_size = "1024mb"
    
    # Set heap placeholder to reduce GC frequency.
    proxy_heap_placeholder = "256mb"
    
    # Proxy will ping backend redis (and clear 'MASTERDOWN' state) in a predefined interval. (0 to disable)
    backend_ping_period = "5s"
    
    # Set backend recv buffer size & timeout.
    backend_recv_bufsize = "128kb"
    backend_recv_timeout = "30s"
    
    # Set backend send buffer & timeout.
    backend_send_bufsize = "128kb"
    backend_send_timeout = "30s"
    
    # Set backend pipeline buffer size.
    backend_max_pipeline = 20480
    
    # Set backend never read replica groups, default is false
    backend_primary_only = false
    
    # Set backend parallel connections per server
    backend_primary_parallel = 1
    backend_replica_parallel = 1
    
    # Set backend tcp keepalive period. (0 to disable)
    backend_keepalive_period = "75s"
    
    # Set number of databases of backend.
    backend_number_databases = 16
    
    # If there is no request from client for a long time, the connection will be closed. (0 to disable)
    # Set session recv buffer size & timeout.
    session_recv_bufsize = "128kb"
    session_recv_timeout = "30m"
    
    # Set session send buffer size & timeout.
    session_send_bufsize = "64kb"
    session_send_timeout = "30s"
    
    # Make sure this is higher than the max number of requests for each pipeline request, or your client may be blocked.
    # Set session pipeline buffer size.
    session_max_pipeline = 10000
    
    # Set session tcp keepalive period. (0 to disable)
    session_keepalive_period = "75s"
    
    # Set session to be sensitive to failures. Default is false, instead of closing socket, proxy will send an error response to client.
    session_break_on_failure = false
    
    # Set metrics server (such as http://localhost:28000), proxy will report json formatted metrics to specified server in a predefined period.
    metrics_report_server = ""
    metrics_report_period = "1s"
    
    # Set influxdb server (such as http://localhost:8086), proxy will report metrics to influxdb.
    metrics_report_influxdb_server = ""
    metrics_report_influxdb_period = "1s"
    metrics_report_influxdb_username = ""
    metrics_report_influxdb_password = ""
    metrics_report_influxdb_database = ""
    
    # Set statsd server (such as localhost:8125), proxy will report metrics to statsd.
    metrics_report_statsd_server = ""
    metrics_report_statsd_period = "1s"
    metrics_report_statsd_prefix = ""
    

    使用命令nohup codis-proxy --ncpu=1 --config=/storage/dep/go/src/github.com/CodisLabs/codis/config/proxy.toml --log=/storage/dep/go/src/github.com/CodisLabs/codis/log/proxy.log --log-level=WARN & 启动

    查看日志tail -f /storage/dep/go/src/github.com/CodisLabs/codis/log/proxy.log.2018-06-25

    2018/06/25 18:18:40 main.go:229: [WARN] [0xc4200eb8c0] proxy waiting online ...
    2018/06/25 18:18:41 main.go:229: [WARN] [0xc4200eb8c0] proxy waiting online ...
    2018/06/25 18:18:43 main.go:229: [WARN] [0xc4200eb8c0] proxy waiting online ...
    2018/06/25 18:18:44 main.go:229: [WARN] [0xc4200eb8c0] proxy waiting online ...
    

    可以观察到codis-proxy已经启动,但是游离的,没有加入codis-dashboard管理,也没有与任何codis-server建立联系,我们可以稍后通过codis-fe将proxy纳入管理

    启动 Codis Server(Redis实例)

    我们可以将vc0,vc1,vc2三个主机上分别启动一个redis,vc0使用端口6380,vc1使用端口6381,vc2使用端口6382,

    对vc0-2分别添加配置文件

    vc0中 /storage/dep/go/src/github.com/CodisLabs/codis/config/redis6380.conf
    vc1中 /storage/dep/go/src/github.com/CodisLabs/codis/config/redis6381.conf
    vc2中 /storage/dep/go/src/github.com/CodisLabs/codis/config/redis6382.conf
    

    vc0中主要修改port 6380pidfile /tmp/redis_6380.pid以及logfile "/tmp/redis_6380.log"以及bind 127.0.0.1 192.168.4.50
    vc1中主要修改port 6381pidfile /tmp/redis_6381.pid以及logfile "/tmp/redis_6381.log"以及bind 127.0.0.1 192.168.4.51
    vc0中主要修改port 6382pidfile /tmp/redis_6382.pid以及logfile "/tmp/redis_6382.log"以及bind 127.0.0.1 192.168.4.52

    在vc0-2中分别执行以下命令启动redis实例

    codis-server /storage/dep/go/src/github.com/CodisLabs/codis/config/redis6380.conf
    codis-server /storage/dep/go/src/github.com/CodisLabs/codis/config/redis6381.conf
    codis-server /storage/dep/go/src/github.com/CodisLabs/codis/config/redis6382.conf
    
    

    启动 Codis FE(管理平台)

    vc0中启动Codis FE nohup ./bin/codis-fe --ncpu=1 --log=/storage/dep/go/src/github.com/CodisLabs/codis/log/fe.log --log-level=WARN --zookeeper=127.0.0.1:2181 --listen=192.168.4.50:8080 &
    注意上面的命令必须要在CODIS_HOME下执行

    其中:

    zookeeper=127.0.0.1:2181为zk的连接地址
    listen=192.168.4.50:8080为管理界面的访问地址和端口

    通过fe管理集群

    通过fe增加Proxy

    打开FE的控制页面在Proxy栏中增加之前配置好的Proxy,输入Proxy的连接地址192.168.4.50:11080

    如图:

    [图片上传失败...(image-74f13d-1530000375805)]

    通过fe增加Group(redis组)

    add-poxy-by-fe

    测试-TODO

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