注意事項：
1.如果是使用redis-trib.rb工具構建集群，集群構建完成前不要配置密碼，集群構建完畢再通過config set + config rewrite命令逐個機器設定密碼
2.如果對集群設定密碼，那麼requirepass和masterauth都需要設定，否則發生主從切換時，就會遇到授權問題，可以模擬並觀察日誌
3.各個節點的密碼都必須一致，否則redirected就會失敗
config set masterauth abc
config set requirepass abc
config rewrite
測試版本：
redis3.0.7
測試環境：
centos7
集群規模：
3主3從
集群構建成功前的redis配置：
port 8000
cluster-enabled yes
cluster-config-file "nodes-8000.conf"
cluster-node-timeout 15000
dir "/opt/redisdata"
appendonly yes
appendfilename "appendonly-8000.aof"
logfile "/opt/redisd程式設計客棧ata/8000.log"
daemonize yes
pidfile "/var/run/redis-8000.pid"
dbfilename "dump-8000.rdb"
cluster-require-full-coverage no
集群構建成功後的redis配置：
port 8004
cluster-enabled yes
cluster-config-file "nodes-8004.conf"
cluster-node-timeout 15000
dir "/opt/redisdata"
appendonly yes
appendfilename "appendonly-8004.aof"
logfile "/opt/redisdata/8004.log"
daemonize yes
pidfile "/var/run/redis-8www.cppcns.com004.pid"
dbfilename www.cppcns.com"dump-8004.rdb"
cluster-require-full-coverage no
# generated by config rewrite
requirepass "abc"
masterauth "abc"
測試：1.8002是主，8005是8002的從，現在要kill掉8002模擬主從切換
2.檢視8005的日誌，8005最終被選舉成新的master
21227:s 14 jun 07:28:49.343 # connection with master lost.
21227:s 14 jun 07:28:49.343 * caching the disconnected master state.
21227:s 14 jun 07:28:49.433 * connecting to master 127.0.0.1:8002
21227:s 14 jun 07:28:49.433 * master sl**e sync started
21227:s 14 jun 07:28:49.434 # error condition on socket for sync: connection refused
21227:s 14 jun 07:28:50.437 * connecting to master 127.0.0.1:8002
21227:s 14 jun 07:29:06.205 # start of election delayed for 564 milliseconds (rank #0, offset 337).
21227:s 14 jun 07:29:06.507 * connecting to master 127.0.0.1:8002
21227:s 14 jun 07:29:06.507 * master sl**e sync started
21227:s 14 jun 07:29:06.507 # error condition on socket for sync: connection refused
21227:s 14 jun 07:29:06.808 # starting a failover election for epoch 10.
21227:s 14 jun 07:29:06.810 # failover election won: i'm the new master.
21227:s 14 jun 07:29:06.810 # configepoch set to 10 after successful failover
21227:m 14 jun 07:29:06.810 * discarding previously cached master state.
3.再次啟動8002，檢視8005的日誌，8002已經變成8005的sl**e
21227:m 14 jun 07:32:53.511 * sl**e 127.0.0.1:8002 asks for synchronization
21227:m 14 jun 07:32:53.511 * full resync requested by sl**e 127.0.0.1:8002
21227:m 14 jun 07:32:53.511 * starting bgs**e for sync with target: disk
21227:m 14 jun 07:32:53.511 * background s**ing started by pid 21613
21613:c 14 jun 07:32:53.513 * db s**ed on disk
21613:c 14 jun 07:32:53.513 * rdb: 0 mb of memory used by copy-on-write
21227:m 14 jun 07:32:53.612 * background s**ing terminated with success
21227:m bwduokkuom14 jun 07:32:53.612 * synchronization with sl**e 127.0.0.1:8002 succeeded
bwduokkuom4.簡單測試了get set命令，正常
本文標題: 基於redis集群設定密碼的例項
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