redis+keepalived高可用实战，亲测已成功，rediskeepalived
192.168.2.180:redis1 keepalived-master 192.168.2.181:redis2 keepalived-slave 192.168.2.222:VIP安装redis：两台机器同时进行： # http://download.redis.io/redis-stable.tar.gz wget -c http://download.redis.io/releases/redis-3.0.7.tar.gz
tar zxf redis-3.0.7.tar.gz
cd redis-3.0.7
make
cd
\cp redis-3.0.7/src/redis-benchmark /usr/local/sbin/
\cp redis-3.0.7/src/redis-check-aof /usr/local/sbin/
\cp redis-3.0.7/src/redis-check-dump /usr/local/sbin/
\cp redis-3.0.7/src/redis-cli /usr/local/sbin/
\cp redis-3.0.7/src/redis-sentinel /usr/local/sbin/
\cp redis-3.0.7/src/redis-server /usr/local/sbin/ mkdir /etc/redis mkdir -p /data/redis-6379/
安装keepalived：两台机器同时进行： # http://www.keepalived.org/documentation.html
wget -c http://www.keepalived.org/software/keepalived-1.2.19.tar.gz
tar zxf keepalived-1.2.19.tar.gz
cd keepalived-1.2.19
./configure --prefix=/usr/local/keepalived
make
make install
cp /usr/local/keepalived/sbin/keepalived /usr/sbin/
cp /usr/local/keepalived/etc/sysconfig/keepalived /etc/sysconfig/
cp /usr/local/keepalived/etc/rc.d/init.d/keepalived /etc/init.d/ mkdir /etc/keepalived redis1和redis2的配置文件： cat >/etc/redis/sentinel.conf<<eof
port 26379 dir /tmp sentinel monitor mymaster 192.168.2.180 6379 2 -------这里redis2上写192.1682.2.181 sentinel down-after-milliseconds mymaster 30000
sentinel parallel-syncs mymaster 1
sentinel failover-timeout mymaster 180000
eof Redis1上的redis-server的配置文件 cat > /etc/redis/redis-6379.conf <<eof
# maxmemory 268435456
maxmemory 256mb
daemonize yes
pidfile /data/redis-6379/redis-6379.pid
port 6379
bind 0.0.0.0
tcp-backlog 511
timeout 0
tcp-keepalive 0
loglevel notice
logfile /data/redis-6379/redis.log
databases 16
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dumpredis-6379.rdb
dir /data/redis-6379
slave-serve-stale-data yes
slave-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
# repl-ping-slave-period 10
# repl-timeout 60
repl-disable-tcp-nodelay no
# repl-backlog-size 1mb
# repl-backlog-ttl 3600
slave-priority 100
# min-slaves-to-write 3
# min-slaves-max-lag 10
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-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
eof Redis2与Redis3上的redis-server配置文件： cat > /etc/redis/redis-6379.conf <<eof
slaveof 192.168.2.180 6379
# maxmemory 268435456
maxmemory 256mb
daemonize yes
pidfile /data/redis-6379/redis-6379.pid
port 6379
bind 0.0.0.0
tcp-backlog 511
timeout 0
tcp-keepalive 0
loglevel notice
logfile /data/redis-6379/redis.log
databases 16
save 900 1
save 300 10
save 60 10000
stop-writes-on-bgsave-error yes
rdbcompression yes
rdbchecksum yes
dbfilename dumpredis-6379.rdb
dir /data/redis-6379
slave-serve-stale-data yes
slave-read-only yes
repl-diskless-sync no
repl-diskless-sync-delay 5
# repl-ping-slave-period 10
# repl-timeout 60
repl-disable-tcp-nodelay no
# repl-backlog-size 1mb
# repl-backlog-ttl 3600
slave-priority 100
# min-slaves-to-write 3
# min-slaves-max-lag 10
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-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
eof Redis1上的keepalived配置文件(vim /etc/keepalived/keepalived.conf) ! Configuration File for keepalived global_defs { router_id REDIS_HA } vrrp_script chk_redis { script "/etc/keepalived/scripts/redis_check.sh 127.0.0.1 6379" interval 2 timeout 2 fall 3 } #vrrp_script chk_redis_2 #{ # script "/etc/keepalived/scripts/redis_check_2.sh 127.0.0.1 6379" # interval 2 # timeout 2 # fall 3 #} vrrp_instance RE_1 { state MASTER #state BACKUP interface eth0 virtual_router_id 60 priority 110 #nopreempt # no seize,must add advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.2.222/24 dev eth0 } track_script { chk_redis } notify_fault /etc/keepalived/scripts/redis_fault.sh notify_stop /etc/keepalived/scripts/redis_stop.sh }
Redis2上的keepalived配置文件(vim /etc/keepalived/keepalived.conf) ! Configuration File for keepalived global_defs { router_id REDIS_HA } vrrp_script chk_redis { script "/etc/keepalived/scripts/redis_check.sh 127.0.0.1 6379" interval 2 timeout 30 fall 30 } vrrp_instance RE_1 { state BACKUP interface eth0 virtual_router_id 60 priority 100 advert_int 1 authentication { auth_type PASS auth_pass 1111 } virtual_ipaddress { 192.168.2.222/24 dev eth0 } track_script { chk_redis } notify_master "/etc/keepalived/scripts/redis_master.sh 127.0.0.1 10.10.12.7 6379" notify_backup "/etc/keepalived/scripts/redis_backup.sh 127.0.0.1 10.10.12.7 6379" notify_fault /etc/keepalived/scripts/redis_fault.sh notify_stop /etc/keepalived/scripts/redis_stop.sh }
启动redis-server redis-server /etc/redis/redis-6379.conf
tail /data/redis-6379/redis.log 启动redis-sentinel redis-sentinel /etc/redis/redis-sentinel.conf tail /data/redis-6379/redis-sentinel.log 编写检查redis脚本： 两台同时进行 mkdir /etc/keepalived/scripts cd /etc/keepalived/scripts redis1： vi redis_check.sh #!/bin/bash ALIVE=`/usr/local/bin/redis-cli -h $1 -p $2 PING` LOGFILE="/var/log/keepalived-redis-check.log" #echo "[CHECK]" >> $LOGFILE #date >> $LOGFILE if [ "$ALIVE"x = "PONG"x ]; then : # echo "Success: redis-cli -h $1 -p $2 PING $ALIVE" >> $LOGFILE 2>&1 exit 0 else date >> $LOGFILE echo "Failed:redis-cli -h $1 -p $2 PING $ALIVE " >> $LOGFILE 2>&1 /etc/init.d/keepalived stop exit 1 fi
vi redis_fault.sh ###!/bin/bash ##LOGFILE=/var/log/keepalived-redis-state.log ###echo "[stop]" >> $LOGFILE ####date >> $LOGFILE #[root@VM-C scripts]# cat redis_fault.sh #!/bin/bash LOGFILE=/var/log/keepalived-redis-state.log echo "[fault]" >> $LOGFILE date >> $LOGFILE
vi redis_stop.sh #!/bin/bash LOGFILE=/var/log/keepalived-redis-state.log echo "[stop]" >> $LOGFILE date >> $LOGFILE
redis2 vi redis_check.sh #!/bin/bash ALIVE=`/usr/local/bin/redis-cli -h $1 -p $2 PING` LOGFILE="/var/log/keepalived-redis-check.log" #echo "[CHECK]" >> $LOGFILE #date >> $LOGFILE if [ "$ALIVE"x = "PONG"x ]; then : # echo "Success: redis-cli -h $1 -p $2 PING $ALIVE" >> $LOGFILE 2>&1 exit 0 else date >> $LOGFILE echo "Failed:redis-cli -h $1 -p $2 PING $ALIVE " >> $LOGFILE 2>&1 /etc/init.d/keepalived stop exit 1 # exit 0 fi
vi redis_fault.sh #!/bin/bash LOGFILE=/var/log/keepalived-redis-state.log echo "[stop]" >> $LOGFILE date >> $LOGFILE
vi redis_stop.sh #!/bin/bash LOGFILE=/var/log/keepalived-redis-state.log echo "[stop]" >> $LOGFILE date >> $LOGFILE
vi redis_master.sh #!/bin/bash REDISCLI="/usr/local/bin/redis-cli -h $1 -p $3" LOGFILE="/var/log/keepalived-redis-state.log" echo "[master]" >> $LOGFILE date >> $LOGFILE echo "Being master...." >> $LOGFILE 2>&1 echo "Run MASTER cmd ..." >> $LOGFILE 2>&1 #$REDISCLI SLAVEOF $2 $3 >> $LOGFILE #sleep 10 #delay 10 s wait data async cancel sync echo "Run SLAVEOF NO ONE cmd ..." >> $LOGFILE $REDISCLI SLAVEOF NO ONE >> $LOGFILE 2>&1
vi redis_backup.sh #!/bin/bash REDISCLI="/usr/local/bin/redis-cli" LOGFILE="/var/log/keepalived-redis-state.log" echo "[backup]" >> $LOGFILE date >> $LOGFILE echo "Run SLAVEOF cmd ..." >> $LOGFILE $REDISCLI SLAVEOF $2 $3 >> $LOGFILE 2>&1 # echo "Being slave...." >> $LOGFILE 2>&1 sleep 15 #delay 15 s wait data sync exchange role
启动两台机器的keepalived ip addr 发现VIP绑定在redis1上： killall -9 redis-server杀死redis进程 再次ip addr会发现VIP转移到redis2，并且redis1的keepalived进程停止
重新启动redis1的keepalived 会发现VIP没有转移并且再次查看keepalived会发现又被关闭了，因为redis1的redis还没有恢复。
恢复redis1 redis-server /etc/redis/redis-6379.conf 启动redis1的keepalived就可以发现vip自动转移回redis1： 注：在操作过程中有时候redis1关闭后VIP也没有转移。后来查看到脚本中的redis_check.sh中有： ALIVE=`/usr/local/bin/redis-cli -h $1 -p $2 PING` 等内容。但是redis2中的/usr/local/bin/ 里却没有redis-server等bin文件。于是我把/usr/local/sbin/ 中的bin文件cp到/bin就可以了。
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