Redis 安裝，主從配置及Sentinel配置自動Failover

標籤：

1、安裝redis

 首頁地址：http://redis.io/

：http://download.redis.io/ 下載最新的源碼包

tar -zxvf redis-stable.tar.gz -C /apps/product/cd  /apps/product/redis-stable/make MALLOC=libcmake install

2、運行

載入設定檔並後台運行

redis-server /apps/product/redis-stable/redis.conf &

#redis-cli （命令列工具）

3、測試

# redis-benchmark --help 擷取協助資訊，其中包含壓力測試命令範例

實際測試舉例

[[email protected]~]# redis-benchmark -t set -c 20 -n 1000000 -r 100000000====== SET ====== 1000000 requests completed in 8.92 seconds 20 parallel clients 3 bytes payload keep alive: 1100.00% <= 0 milliseconds112095.06 requests per second　　

4、主從配置及測試:

主	gc-redis1	10.10.10.15	6379
從	gc-redis2	10.10.10.16	6379
從	gc-redis3	10.10.10.17	6379

#主伺服器(10.15)上做如下配置，其他預設即可：

[[email protected] redis-stable]# vim /apps/product/redis-stable/redis.confmasterauth "jrgcredispass"requirepass "jrgcredispass"

#從伺服器上(10.16,10.17)做如下配置，其他預設即可：

[[email protected] redis-stable]# vim /apps/product/redis-stable/redis.confslaveof 10.10.10.15 6379masterauth "jrgcredispass"requirepass "jrgcredispass"[[email protected] redis-stable]# vim /apps/product/redis-stable/redis.confslaveof 10.10.10.15 6379masterauth "jrgcredispass"requirepass "jrgcredispass"

#啟動主、從redis服務：

redis-server /apps/product/redis-stable/redis.conf &

#主伺服器顯示資訊：

[13997] 03 Nov 09:57:21.045 * Slave ask for synchronization[13997] 03 Nov 09:57:21.045 * Starting BGSAVE for SYNC[13997] 03 Nov 09:57:21.046 * Background saving started by pid 14002[14002] 03 Nov 09:57:21.058 * DB saved on disk[14002] 03 Nov 09:57:21.059 * RDB: 0 MB of memory used by copy-on-write[13997] 03 Nov 09:57:21.070 * Background saving terminated with success[13997] 03 Nov 09:57:21.070 * Synchronization with slave succeeded

#從伺服器顯示資訊：

　 [3496] 03 Nov 09:56:41.953 * Connecting to MASTER...  [3496] 03 Nov 09:56:41.953 * MASTER <-> SLAVE sync started  [3496] 03 Nov 09:56:41.954 * Non blocking connect for SYNC fired the event.  [3496] 03 Nov 09:56:41.954 * Master replied to PING, replication can continue...  [3496] 03 Nov 09:56:42.055 * MASTER <-> SLAVE sync: receiving 18 bytes from master  [3496] 03 Nov 09:56:42.055 * MASTER <-> SLAVE sync: Loading DB in memory  [3496] 03 Nov 09:56:42.055 * MASTER <-> SLAVE sync: Finished with success  [3499] 03 Nov 09:56:42.056 * SYNC append only file rewrite performed  [3499] 03 Nov 09:56:42.057 * AOF rewrite: 0 MB of memory used by copy-on-write  [3496] 03 Nov 09:56:42.057 * Background append only file rewriting started by pid 3499  [3496] 03 Nov 09:56:42.154 * Background AOF rewrite terminated with success  [3496] 03 Nov 09:56:42.154 * Parent diff successfully flushed to the rewritten AOF (0 bytes)  [3496] 03 Nov 09:56:42.154 * Background AOF rewrite finished successfully

#主伺服器查看主從資訊

[[email protected] ~]# redis-cli -h 127.0.0.1 -a redispass info replication# Replicationrole:masterconnected_slaves:2slave0:ip=10.10.10.16,port=6379,state=online,offset=168812144,lag=1slave1:ip=10.10.10.17,port=6379,state=online,offset=168812144,lag=0master_repl_offset:168812281repl_backlog_active:1repl_backlog_size:1048576repl_backlog_first_byte_offset:167763706repl_backlog_histlen:1048576

#從伺服器查看主從資訊

[[email protected] ~]# redis-cli -h 127.0.0.1 -a redispass info replication# Replicationrole:slavemaster_host:10.10.10.15master_port:6379master_link_status:upmaster_last_io_seconds_ago:0master_sync_in_progress:0slave_repl_offset:168809239slave_priority:100slave_read_only:1connected_slaves:0master_repl_offset:0repl_backlog_active:0repl_backlog_size:1048576repl_backlog_first_byte_offset:0repl_backlog_histlen:0

#寫同步測試

 #主伺服器 

[[email protected] ~]# redis-cli -h 127.0.0.1 -a jrgcredispass redis 127.0.0.1:6379> set a 123OKredis 127.0.0.1:6379> get a"123"

#從伺服器

[[email protected]~]# redis-cli -h 127.0.0.1 -a jrgcredispassredis 127.0.0.1:6379> get a "123"[[email protected]~]# redis-cli -h 127.0.0.1 -a jrgcredispassredis 127.0.0.1:6379> get a "123"  redis 127.0.0.1:6379> set b 234 (error) READONLY You can‘t write against a read only slave. （開起了唯讀模式，所以從將不能寫入資料，可以保證資料只從主伺服器同步至從伺服器）

#故障測試#從伺服器宕機將自動從主伺服器的主從關係中解除#主伺服器宕機，從伺服器顯示，並且不能自動切換

[15932] 03 Nov 09:46:25.465 * Connecting to MASTER...[15932] 03 Nov 09:46:25.465 * MASTER <-> SLAVE sync started[15932] 03 Nov 09:46:25.466 # Error condition on socket for SYNC: Connection refused

5、Redis sentinel配置

 首頁地址：http://redis.io/topics/sentinel

sentinel主要功能就是為Redis M-S(master,slaves)叢集提供了

1)master存活檢測

2)叢集中M-S服務監控

3) 自動容錯移轉,M-S角色轉換等能力,從一個方面說是提高了redis叢集的可用性.

#添加並編輯設定檔/etc/sentinel.conf，新增內容如下，也可在安裝檔案中負責sentinel設定檔並作適當修改： 

[[email protected] ~]# vim /apps/product/redis-stable/sentinel.confport 26379sentinel monitor mymaster 10.10.10.15 6379 2sentinel failover-timeout mymaster 900000sentinel auth-pass mymaster jrgcredispasssentinel config-epoch mymaster 2#sentinel can-failover mymaster yessentinel leader-epoch mymaster 2-----------------------------------------------------------------------------------------------[[email protected] ~]# vim /apps/product/redis-stable/sentinel.confport 26380sentinel monitor mymaster 10.10.10.15 6379 2sentinel failover-timeout mymaster 900000sentinel auth-pass mymaster jrgcredispasssentinel config-epoch mymaster 2#sentinel can-failover mymaster yessentinel leader-epoch mymaster 2----------------------------------------------------------------------------------------------[[email protected] ~]# vim /apps/product/redis-stable/sentinel.confport 26381sentinel monitor mymaster 10.10.10.15 6379 2sentinel failover-timeout mymaster 900000sentinel auth-pass mymaster jrgcredispasssentinel config-epoch mymaster 2#sentinel can-failover mymaster yessentinel leader-epoch mymaster 2

#在三個伺服器中以sentinel模式啟動redis-server

啟動sentinel [[email protected] ~]#redis-server /apps/product/redis-stable/sentinel.conf --sentinel &[[email protected] ~]#redis-server /apps/product/redis-stable/sentinel.conf --sentinel &[[email protected] ~]#redis-server /apps/product/redis-stable/sentinel.conf --sentinel &

#三台伺服器sentinel輸出：（注意每個機器輸出對應的都是另外兩台機器的IP）

#關掉主gc-redis1的redis-server服務#將重新選舉主伺服器並重新設定串連到新的主伺服器：

#查看主從關係：（gc-redis2為主，gc-redis3為從，如果gc-redis1重新啟動，也將為從伺服器加入到新的叢集）

啟動redisredis-server /usr/local/redis-stable/redis.conf & 停止redisredis-cli -a jrgcredispass shutdown 啟動sentinelredis-server /usr/local/redis-stable/sentinel.conf --sentinel & 查看主備資訊：redis-cli -h 127.0.0.1 -p 6379 -a redispass info replication

.

參考文檔：http://mrcto.blog.51cto.com/1923168/1319542　　

　　

Redis 安裝，主從配置及Sentinel配置自動Failover