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安装codis以及遇到的一些问题
redis集群安装用的是codis ，由豌豆荚开源，相比较twemproxy的好处有很多，参考http://blog.csdn.net/hunci/article/details/51799468
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不废话，搞起
下面的安装文档抄袭了小炒肉的，连接如下
https://www.kissni.com/2017/04/06/codis-redis/
官网的搭建文档看https://github.com/CodisLabs/codis/blob/release3.2/doc/tutorial_zh.md readme
但是部署中也遇到了一些问题
1，在codis make 的时候出现错误
go build -i -o bin/codis-dashboard ./cmd/dashboard
go build github.com/CodisLabs/codis/vendor/github.com/ugorji/go/codec: /opt/local/go/pkg/tool/linux_amd64/compile: signal: killed
make: *** [codis-dashboard] 错误 1
原因：我用的vps，内存本来就很小只有500M，查看日志 /var/log/message
May 16 09:30:06 vultr kernel: Out of memory: Kill process 10020 (compile) score 460 or sacrifice child
May 16 09:30:06 vultr kernel: Killed process 10020, UID 0, (compile) total-vm:383560kB, anon-rss:371776kB, file-rss:120kB
是因为 应用服务在启动的时候，触发的linux系统内存的调用机制，为了保证系统正常运行oom 杀掉了编译进程
解决：两个方法，调节内核，不推荐，会玩挂的（大神请无视）
第二个方法，增加内存就好了
2，编译过程中报错
zmalloc.h:50:31: error: jemalloc/jemalloc.h: No such file or directory
zmalloc.h:55:2: error: #error "Newer version of jemalloc required"
make[1]: *** [adlist.o] Error 1
undefined reference to `dladdr'
两个错误
解决：
其实两个错误都是没有制定正确的连接库的位置
编译的时候 加上两个参数就好了
make MALLOC=libc LDFLAGS+=-ldl
3，在dashboard面板上添加codis-proxy时候，dashboard的server配置文件，codis-proxy中的配置文件
product_name = "codis-demo" product_auth = ""
这个认证，一定要一直，因为两者都是去zookeeper里去值，或者说dashboard是通过zk来给codis-proxy
传达消息的
环境配置
安装 git
yum install -y git autoconf
安装 golang，(使用 1.5.x 版本)
wget https://storage.googleapis.com/golang/go1.5.4.linux-amd64.tar.gz tar zxvf go1.5.4.linux-amd64.tar.gz mkdir /opt/local mv go /opt/local/
配置环境变量
vi /etc/profile # 添加如下: # golang ENV export GOROOT=/opt/local/go export PATH=$PATH:$GOROOT/bin export GOPATH=/opt/local/codis# 立即生效 source /etc/profile # 检查版本 go version go version go1.5.4 linux/amd64 echo $GOPATH /opt/local/codis
安装 Codis
下载 Codis 源码
mkdir -p $GOPATH/src/github.com/CodisLabs cd $GOPATH/src/github.com/CodisLabs git clone https://github.com/CodisLabs/codis.git -b release3.1
编译 Codis 源码
cd $GOPATH/src/github.com/CodisLabs/codismake
make -j -C extern/redis-3.2.4/
# 输入如下信息：
go build -i -o bin/codis-dashboard ./cmd/dashboard
go build -i -o bin/codis-proxy ./cmd/proxy
go build -i -o bin/codis-admin ./cmd/admin
go build -i -o bin/codis-ha ./cmd/ha
go build -i -o bin/codis-fe ./cmd/fe
# 查看 安装以后的版本
cat bin/version
version = 2017-03-08 14:07:13 +0800 @b1919d11593dfd1f47a2461837233dfc8fc78002 @3.1.5-26-gb1919d1
compile = 2017-04-05 18:13:46 +0800 by go version go1.5.4 linux/amd64
# 复制文件，方便管理
mkdir -p /opt/local/codis/{bin,logs,data}/
cp -rf $GOPATH/src/github.com/CodisLabs/codis/bin/* /opt/local/codis/bin
cp -rf $GOPATH/src/github.com/CodisLabs/codis/config /opt/local/codis/
配置 Codis
Codis Dashboard
是后台服务，展示页面是由fe来展示的，
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。
cd /opt/local/codis/config/ vim dashboard.toml
# 修改配置文件 ################################################## # # # Codis-Dashboard # # # ################################################## # Set Coordinator, only accept "zookeeper" & "etcd" & "filesystem". coordinator_name = "zookeeper" coordinator_addr = "127.0.0.1:2181" # Set Codis Product Name/Auth. product_name = "codis-demo" product_auth = "" # Set bind address for admin(rpc), tcp only. admin_addr = "0.0.0.0:18080" # Set configs for redis sentinel. sentinel_quorum = 2 sentinel_parallel_syncs = 1 sentinel_down_after = "30s" sentinel_failover_timeout = "5m" sentinel_notification_script = "" sentinel_client_reconfig_script = ""
# 启动 Dashboard nohup /opt/local/codis/bin/codis-dashboard --ncpu=4 --config=/opt/local/codis/config/dashboard.toml \ --log=/opt/local/codis/logs/dashboard.log --log-level=WARN &
Codis Proxy
cd /opt/local/codis/config/ vim proxy.toml
# 修改配置文件 ################################################## # # # Codis-Proxy # # # ################################################## # Set Codis Product Name/Auth. product_name = "codis-demo" product_auth = "" # Set bind address for admin(rpc), tcp only. admin_addr = "0.0.0.0:11080" ###注释说的很明显了，这个是在dashboard上添加proxy的地址，是admin命令控制台，控制proxy的地址 # Set bind address for proxy, proto_type can be "tcp", "tcp4", "tcp6", "unix" or "unixpacket". proto_type = "tcp4" proxy_addr = "0.0.0.0:19000" # Set jodis address & session timeout, only accept "zookeeper" & "etcd". jodis_name = "zookeeper" jodis_addr = "127.0.0.1:2181" 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 = 1024 # 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" # 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 = 1024 # 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 = ""
# 启动 codis-proxy nohup /opt/local/codis/bin/codis-proxy --ncpu=4 --config=/opt/local/codis/config/proxy.toml \ --log=/opt/local/codis/logs/proxy.log --log-level=WARN & # 日志输出如下： proxy waiting online ... # 必须添加到集群中，才正常。 # 可使用 Codis-fe 界面添加 或者使用 Codis-admin 添加
Codis-Server
# 启动 server 与 启动 redis 方法相同 nohup /opt/local/codis/bin/codis-server /opt/local/codis/config/redis.conf & # 启动 Codis-Server 以后需要使用 Codis-fe 或者 Codis-admin 添加到集群
# 配置文件 bind 127.0.0.1 protected-mode yes port 6379 tcp-backlog 2048 timeout 0 tcp-keepalive 300 daemonize no supervised no pidfile /var/run/redis_6379.pid loglevel notice logfile "/opt/local/codis/logs/redis.log" maxmemory 10gb databases 16 save 900 1 save 300 10 save 60 10000 stop-writes-on-bgsave-error yes rdbcompression yes rdbchecksum yes dbfilename redis_dump.rdb dir /opt/local/codis/data slave-serve-stale-data yes slave-read-only yes repl-diskless-sync no repl-diskless-sync-delay 5 repl-disable-tcp-nodelay no slave-priority 100 appendonly no appendfilename "appendonly.aof" appendfsync everysec no-appendfsync-on-rewrite no auto-aof-rewrite-percentage 100 auto-aof-rewrite-min-size 64mb aof-load-truncated yes lua-time-limit 5000 slowlog-log-slower-than 10000 slowlog-max-len 128 latency-monitor-threshold 0 notify-keyspace-events "" hash-max-ziplist-entries 512 hash-max-ziplist-value 64 list-max-ziplist-size -2 list-compress-depth 0 set-max-intset-entries 512 zset-max-ziplist-entries 128 zset-max-ziplist-value 64 hll-sparse-max-bytes 3000 activerehashing yes client-output-buffer-limit normal 0 0 0 client-output-buffer-limit slave 256mb 64mb 60 client-output-buffer-limit pubsub 32mb 8mb 60 hz 10 aof-rewrite-incremental-fsync yes
Codis-FE
这里要注意下，FE才是真正的展示页面，所以监听的地址要写本机的地址，这样才可以在浏览器中访问集群的控制面板，而codis-dashboard是算是后台的服务，一开始没弄明白（搞死了，弄了一上午）
# 启动 codis-fe nohup /opt/local/codis/bin/codis-fe --ncpu=4 --log=/opt/local/codis/logs/fe.log --log-level=WARN --zookeeper=127.0.0.1:2181 --listen=127.0.0.1:8080 &
Codis-admin
其实是集群的命令管理工具
# 添加 codis-proxy /opt/local/codis/bin/codis-admin --dashboard=127.0.0.1:18080 --create-proxy -x 127.0.0.1:11080 # 日志输入如下： jodis create node /jodis/codis-demo/proxy-15fba3007f3c6ee0887749681cb82307 proxy is working ...
# 修复异常退出的 Codis-dashboard # dashboard 非正常退出，或者 kill -9 时使用 /opt/local/codis/bin/codis-admin --remove-lock --product=codis-demo --zookeeper=127.0.0.1:2181
# 修复异常退出的 Codis-proxy # proxy 非正常退出，或者 kill -9 时使用 /opt/local/bin/codis-admin --dashboard=127.0.0.1:18080 --remove-proxy --addr=127.0.0.1:11080 --force
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