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
架构图
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。
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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