想跑一下Redis集羣，但是沒有那麼多服務器，所以使用僞分佈式模式，模擬一下，記錄一下安裝過程。
軟件： redis-3.0.3.tar.gz
集羣正常工作至少需要3個主節點（本示例創建6個節點，3主3從節點）
安裝前提，要有ruby、rubygems環境，先安裝一下：
#安裝ruby yum --nogpgcheck -y install ruby yum --nogpgcheck -y install ruby-devel.x86_64 #安裝rubygem yum --nogpgcheck -y install rubygems #安裝Ruby的redis接口gem-redis
https://rubygems.org/gems/redis/versions/3.2.2 (要翻牆下載)
安裝Redis軟件
#進入安裝目錄 cd /usr/local/ rm -rf redis rm -rf redis-3.0.3 #解壓 tar -zxvf redis-3.0.3.tar.gz mv redis-3.0.3 redis #進入源碼目錄 cd redis #編譯安裝 make && make install
創建集羣的相關配置
#創建集羣需要的目錄 mkdir -p /usr/local/redis/cluster/7000/ mkdir -p /usr/local/redis/cluster/7001/ mkdir -p /usr/local/redis/cluster/7002/ mkdir -p /usr/local/redis/cluster/7003/ mkdir -p /usr/local/redis/cluster/7004/ mkdir -p /usr/local/redis/cluster/7005/ #修改配置文件redis.conf cp /usr/local/redis/redis.conf /usr/local/redis/cluster/7000/redis.conf cp /usr/local/redis/redis.conf /usr/local/redis/cluster/7001/redis.conf cp /usr/local/redis/redis.conf /usr/local/redis/cluster/7002/redis.conf cp /usr/local/redis/redis.conf /usr/local/redis/cluster/7003/redis.conf cp /usr/local/redis/redis.conf /usr/local/redis/cluster/7004/redis.conf cp /usr/local/redis/redis.conf /usr/local/redis/cluster/7005/redis.conf
cp /usr/local/redis/src/redis-server /usr/local/redis/cluster/7000/redis-server
cp /usr/local/redis/src/redis-server /usr/local/redis/cluster/7001/redis-server
cp /usr/local/redis/src/redis-server /usr/local/redis/cluster/7002/redis-server
cp /usr/local/redis/src/redis-server /usr/local/redis/cluster/7003/redis-server
cp /usr/local/redis/src/redis-server /usr/local/redis/cluster/7004/redis-server
cp /usr/local/redis/src/redis-server /usr/local/redis/cluster/7005/redis-server
配置文件示例：
daemonize no pidfile /var/run/redis.pid #修改端口 port 7000 tcp-backlog 511 timeout 0 tcp-keepalive 0 loglevel notice logfile "" databases 16 save 900 1 save 300 10 save 60 10000 stop-writes-on-bgsave-error yes rdbcompression yes rdbchecksum yes dbfilename dump.rdb dir ./ 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 #修改爲yes appendonly yes 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-entries 512 list-max-ziplist-value 64 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 #=========================這幾個參數是必須的，可以看下官方文檔=============================== daemonize yes cluster-enabled yes cluster-config-file nodes.conf cluster-node-timeout 5000 #========================================================
啓動Redis實例：
#分別啓動這6個redis實例（此時，節點均以Redis Cluster的方式運行，但並沒有自動構建集羣，因爲還處於“我不認識你，你不屬於我”的狀態，它們每個都是孤零零的Redis節點，或者說只包含了一個節點的集羣） cd /usr/local/redis/cluster/7000 && redis-server redis.conf > redis.log 2>&1 & cd /usr/local/redis/cluster/7001 && redis-server redis.conf > redis.log 2>&1 & cd /usr/local/redis/cluster/7002 && redis-server redis.conf > redis.log 2>&1 & cd /usr/local/redis/cluster/7003 && redis-server redis.conf > redis.log 2>&1 & cd /usr/local/redis/cluster/7004 && redis-server redis.conf > redis.log 2>&1 & cd /usr/local/redis/cluster/7005 && redis-server redis.conf > redis.log 2>&1 &
##啓動之後使用命令查看redis的啓動情況
ps -ef|grep redis
創建集羣，讓上面的實例互相通訊
#創建集羣，讓上面的實例互相通訊（1 表示爲每個master分配一個salve） /usr/local/redis/src/redis-trib.rb create --replicas 1 \ 127.0.0.1:7000 \ 127.0.0.1:7001 \ 127.0.0.1:7002 \ 127.0.0.1:7003 \ 127.0.0.1:7004 \ 127.0.0.1:7005
集羣創建完成，可以使用下面的命令查看相關信息：
#查看集羣目前狀況 redis-cli -c -p 7000 #打印集羣的信息 cluster info #列出集羣當前已知的所有節點（node），以及這些節點的相關信息。 cluster nodes
輸出的信息：
127.0.0.1:7000 master - 0 1439345771781 2 connected 5461-10922 127.0.0.1:7001 master - 0 1439345772286 3 connected 10923-16383 127.0.0.1:7002 myself,master - 0 0 1 connected 0-5460 127.0.0.1:7003 slave 2566ea486fc30c911aafaf1b71130fd24a38dba9 0 1439345772791 4 connected 127.0.0.1:7004 slave edea1e50bd224c6895b1904bce79e83fa07d6017 0 1439345772286 5 connected 127.0.0.1:7005 slave ab06e033698627ce0ecd4c8c645585a1ae70cc84 0 1439345771276 6 connected
從上面的信息可以明顯看到哪些是主節點、從節點。
#將節點的配置文件保存到硬盤裏
cluster saveconfig
#------------------------測試-----------------------------------
#連接端口（可以使用其他端口測試7001-> 7000）
redis-cli -c -p 7001
127.0.0.1:7001> set key001 v001
127.0.0.1:7001> get key001
正常輸出信息的話，集羣建立成功，集羣搭建完成。
祝好運！
