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2025-03-17 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Servers >
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Shulou(Shulou.com)06/01 Report--
This article introduces the knowledge of "how to configure redis master-slave switch in keepalived". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!
IP Planning:
Master node: 10.0.37.224
Backup node: 10.0.37.225
VIP:10.0.37.226
One 2 nodes install redis
1 installation
[root@ray0redis02 ~] # wget http://download.redis.io/releases/redis-4.0.9.tar.gz
[root@ray0redis02 ~] # tar xzf redis-4.0.9.tar.gz
[root@ray0redis02 ~] # cd redis-4.0.9
[root@ray0redis02 ~] # make
[root@ray0redis02 ~] # make install
[root@ray0redis02] # mkdir-p / usr/local/redis/bin
[root@ray0redis02] # mkdir-p / usr/local/redis/etc
[root@ray0redis02 ~] # cp redis.conf / usr/local/redis/etc
[root@ray0redis02 ~] # cd src/
[root@ray0redis02 ~] # cp mkreleasehdr.sh redis-benchmark redis-check-aof redis-cli redis-server / usr/local/redis/bin
# [root@ray0redis02 ~] $vi / usr/local/redis/etc/redis.conf # change the value of daemonize to yes
[root@ray0redis02] # sed-I 's/daemonize no/daemonize yes/g' / usr/local/redis/etc/redis.conf
# start
[root@ray0redis02] # / usr/local/redis/bin/redis-server / usr/local/redis/etc/redis.conf
2 configure slave information of backup node
[root@ray0redis02 ~] # grep "^ slaveof" / usr/local/redis/etc/redis.conf
Slaveof 10.0.37.224 6379
# start
[root@ray0redis02] # / usr/local/redis/bin/redis-server / usr/local/redis/etc/redis.conf
Second, install keepalived
1 both nodes use yum to install keepalived
[root@ray0redis01 ~] # yum-y install keepalived
[root@ray0redis02 ~] # yum-y install keepalived
2 Primary Node keepalived configuration File
[root@ray0redis01 ~] # cat / etc/keepalived/keepalived.conf
! Configuration File for keepalived
Global_defs {
Router_id redis01
}
Vrrp_script chk_redis
{
Script "/ etc/keepalived/scripts/redis_check.sh"
Interval 2
Timeout 2
Fall 3
}
Vrrp_instance redis {
State MASTER
Interface ens192 # # needs to be modified to the name of the actual network card
Virtual_router_id 60
Priority 100 # # weight, the larger the number, the greater the weight, and the value of the primary node is larger than that of the standby node.
Advert_int 1
Authentication {# all node must same
Auth_type PASS
Auth_pass 1111
}
Virtual_ipaddress {
10.0.37.226 # need to modify the virtual IP that is actually assigned
}
Track_script {
Chk_redis
}
Notify_master "/ etc/keepalived/scripts/redis_master.sh 127.0.0.1 10.0.37.225 6379" # 10.0.37.225 needs to be modified to the actual remote host IP
Notify_backup "/ etc/keepalived/scripts/redis_backup.sh 127.0.0.1 10.0.37.225 6379" # 10.0.37.225 needs to be modified to the actual remote host IP
Notify_fault / etc/keepalived/scripts/redis_fault.sh
Notify_stop / etc/keepalived/scripts/redis_stop.sh
}
3 standby node keepalived configuration file
[root@ray0redis02 ~] # cat / etc/keepalived/keepalived.conf
! Configuration File for keepalived
Global_defs {
Router_id redis02
}
Vrrp_script chk_redis
{
Script "/ etc/keepalived/scripts/redis_check.sh"
Interval 2
Timeout 2
Fall 3
}
Vrrp_instance redis {
State BACKUP
Interface ens192 # # needs to be modified to the name of the actual network card
Virtual_router_id 60
Priority 90
Advert_int 1
Authentication {# all node must same
Auth_type PASS
Auth_pass 1111
}
Virtual_ipaddress {
10.0.37.226 # need to modify the virtual IP that is actually assigned
}
Track_script {
Chk_redis
}
Notify_master "/ etc/keepalived/scripts/redis_master.sh 127.0.0.1 10.0.37.224 6379" # 10.0.37.224 needs to be modified to the actual remote host IP
Notify_backup "/ etc/keepalived/scripts/redis_backup.sh 127.0.0.1 10.0.37.224 6379" # 10.0.37.224 needs to be modified to the actual remote host IP
Notify_fault / etc/keepalived/scripts/redis_fault.sh
Notify_stop / etc/keepalived/scripts/redis_stop.sh
}
Virtual_server 10.0.37.226 6379 {
Delay_loop 6
Lb_algo rr
Lb_kind NAT
Nat_mask 255.255.255.0
Persistence_timeout 50
Protocol TCP
Sorry_server 127.0.0.1 80
Real_server 10.0.37.224 6379 {
Weight 1
TCP_CHECK {
Connect_timeout 3
Nb_get_retry 3
Delay_before_retry 3
Connect_port 6379
}
}
Real_server 10.0.37.225 6379 {
Weight 1
TCP_CHECK {
Connect_timeout 3
Nb_get_retry 3
Delay_before_retry 3
Connect_port 6379
}
}
}
4 all scripts for two nodes
[root@ray0redis01 ~] # cat / etc/keepalived/scripts/redis_check.sh
#! / bin/bash
ALIVE= `/ usr/local/redis/bin/redis-cli-a 123456 PING`
["$ALIVE" = = "PONG"] & & {echo $ALIVE & & exit 0;} | {echo $ALIVE & & exit 1;}
[root@ray0redis01 ~] # cat / etc/keepalived/scripts/redis_master.sh
#! / bin/bash
REDISCLI= "/ usr/local/redis/bin/redis-cli-h $1-p $3"
LOGFILE= "/ var/log/keepalived-redis-state.log"
Echo "[master]" > > $LOGFILE
Date > > $LOGFILE
Echo "Being master...." > > $LOGFILE
Echo "Run MASTER cmd..." > > $LOGFILE
$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
[root@ray0redis01 ~] # cat / etc/keepalived/scripts/redis_backup.sh
#! / bin/bash
REDISCLI= "/ usr/local/redis/bin/redis-cli-h $1-p $3"
LOGFILE= "/ var/log/keepalived-redis-state.log"
Echo "[backup]" > > $LOGFILE
Date > > $LOGFILE
Echo "Run SLAVEOF cmd..." > > $LOGFILE
$REDISCLI SLAVEOF $2 $3 > > $LOGFILE 2 > & 1
Sleep 15 # delay 15 s wait data sync exchange role
[root@ray0redis01 ~] # cat / etc/keepalived/scripts/redis_fault.sh
#! / bin/bash
LOGFILE=/var/log/keepalived-redis-state.log
Echo-e "[fault]\ t $(date'+% F% T')" > > $LOGFILE
[root@ray0redis01 ~] # cat / etc/keepalived/scripts/redis_stop.sh
#! / bin/bash
LOGFILE=/var/log/keepalived-redis-state.log
Start keepalived, verify the condition of HA and switch
[root@ray0redis01 ~] # systemctl status keepalived
● keepalived.service-LVS and VRRP High Availability Monitor
Loaded: loaded (/ usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
Active: active (running) since Mon 2018-12-03 20:41:42 EST; 1h 10min ago
Process: 5122 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 5124 (keepalived)
CGroup: / system.slice/keepalived.service
├─ 5124 / usr/sbin/keepalived-D
├─ 5125 / usr/sbin/keepalived-D
└─ 5126 / usr/sbin/keepalived-D
Dec 03 20:57:08 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 20:57:08 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 20:57:08 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 20:57:08 ray0redis01 Keepalived_vrrp [5126]: Opening script file / etc/keepalived/scripts/redis_master.sh
Dec 03 20:57:13 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 20:57:13 ray0redis01 Keepalived_vrrp [5126]: VRRP_Instance (redis) Sending/queueing gratuitous ARPs on ens192 for 10.0.37.226
Dec 03 20:57:13 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 20:57:13 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 20:57:13 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 20:57:13 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
[root@ray0redis01 ~] # / usr/local/redis/bin/redis-cli info | egrep-A11 Replication
# Replication
Role:master
Connected_slaves:1
Slave0:ip=10.0.37.225,port=6379,state=online,offset=4928,lag=1
Master_replid:ac8db2b7075f51c318b978be0a350b7fd987ddbb
Master_replid2:3e93b153857adbdfa981a3f66fd18244b9bfae5c
Master_repl_offset:4928
Second_repl_offset:183
Repl_backlog_active:1
Repl_backlog_size:1048576
Repl_backlog_first_byte_offset:183
Repl_backlog_histlen:4746
# Kill the redis process
[root@ray0redis01] # kill-9 6605
[root@ray0redis01 ~] # systemctl status keepalived
● keepalived.service-LVS and VRRP High Availability Monitor
Loaded: loaded (/ usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
Active: active (running) since Mon 2018-12-03 20:41:42 EST; 1h 12min ago
Process: 5122 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 5124 (keepalived)
CGroup: / system.slice/keepalived.service
├─ 5124 / usr/sbin/keepalived-D
├─ 5125 / usr/sbin/keepalived-D
└─ 5126 / usr/sbin/keepalived-D
Dec 03 20:57:08 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 20:57:08 ray0redis01 Keepalived_vrrp [5126]: Opening script file / etc/keepalived/scripts/redis_master.sh
Dec 03 20:57:13 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 20:57:13 ray0redis01 Keepalived_vrrp [5126]: VRRP_Instance (redis) Sending/queueing gratuitous ARPs on ens192 for 10.0.37.226
Dec 03 20:57:13 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 20:57:13 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 20:57:13 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 20:57:13 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:54:33 ray0redis01 Keepalived_vrrp [5126]: / etc/keepalived/scripts/redis_check.sh exited with status 1
Dec 03 21:54:34 ray0redis01 Keepalived_healthcheckers [5125]: TCP connection to [10.0.37.224]: 6379 failed.
# observe the status of the slave node and complete the switch
[root@ray0redis02 ~] # systemctl status keepalived
● keepalived.service-LVS and VRRP High Availability Monitor
Loaded: loaded (/ usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
Active: active (running) since Mon 2018-12-03 20:54:37 EST; 1h 0min ago
Process: 6112 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 6114 (keepalived)
CGroup: / system.slice/keepalived.service
├─ 6114 / usr/sbin/keepalived-D
├─ 6115 / usr/sbin/keepalived-D
└─ 6116 / usr/sbin/keepalived-D
Dec 03 21:54:39 ray0redis02 Keepalived_vrrp [6116]: Opening script file / etc/keepalived/scripts/redis_master.sh
Dec 03 21:54:41 ray0redis02 Keepalived_healthcheckers [6115]: TCP connection to [10.0.37.224]: 6379 failed.
Dec 03 21:54:41 ray0redis02 Keepalived_healthcheckers [6115]: Check on service [10.0.37.224]: 6379 failed after 1 retry.
Dec 03 21:54:41 ray0redis02 Keepalived_healthcheckers [6115]: Removing service [10.0.37.224]: 6379 from VS [10.0.37.226]: 6379
Dec 03 21:54:44 ray0redis02 Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:54:44 ray0redis02 Keepalived_vrrp [6116]: VRRP_Instance (redis) Sending/queueing gratuitous ARPs on ens192 for 10.0.37.226
Dec 03 21:54:44 ray0redis02 Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:54:44 ray0redis02 Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:54:44 ray0redis02 Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:54:44 ray0redis02 Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
[root@ray0redis02] # tail-20f / var/log/messages
Dec 3 21:54:38 localhost Keepalived_healthcheckers [6115]: TCP connection to [10.0.37.224]: 6379 failed.
Dec 3 21:54:38 localhost Keepalived_vrrp [6116]: VRRP_Instance (redis) Transition to MASTER STATE
Dec 3 21:54:39 localhost Keepalived_vrrp [6116]: VRRP_Instance (redis) Entering MASTER STATE
Dec 3 21:54:39 localhost Keepalived_vrrp [6116]: VRRP_Instance (redis) setting protocol VIPs.
Dec 3 21:54:39 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:39 localhost Keepalived_vrrp [6116]: VRRP_Instance (redis) Sending/queueing gratuitous ARPs on ens192 for 10.0.37.226
Dec 3 21:54:39 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:39 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:39 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:39 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:39 localhost NetworkManager: [1543892079.9698] policy: set-hostname: current hostname was changed outside NetworkManager: 'ray0redis02'
Dec 3 21:54:41 localhost Keepalived_healthcheckers [6115]: TCP connection to [10.0.37.224]: 6379 failed.
Dec 3 21:54:41 localhost Keepalived_healthcheckers [6115]: Check on service [10.0.37.224]: 6379 failed after 1 retry.
Dec 3 21:54:41 localhost Keepalived_healthcheckers [6115]: Removing service [10.0.37.224]: 6379 from VS [10.0.37.226]: 6379
Dec 3 21:54:44 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:44 localhost Keepalived_vrrp [6116]: VRRP_Instance (redis) Sending/queueing gratuitous ARPs on ens192 for 10.0.37.226
Dec 3 21:54:44 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:44 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:44 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:44 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
# start the master node, and switch keepalived and redis back to the master node
[root@ray0redis01] # / usr/local/redis/bin/redis-server / usr/local/redis/etc/redis.conf
12049:C 03 Dec 21:56:37.698 # oO0OoO0OoO0Oo Redis is starting oO0OoO0OoO0Oo
12049:C 03 Dec 21:56:37.698 # Redis version=4.0.9, bits=64, commit=00000000, modified=0, pid=12049, just started
12049:C 03 Dec 21:56:37.698 # Configuration loaded
[root@ray0redis01 ~] # systemctl status keepalived
● keepalived.service-LVS and VRRP High Availability Monitor
Loaded: loaded (/ usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
Active: active (running) since Mon 2018-12-03 20:41:42 EST; 1h 14min ago
Process: 5122 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 5124 (keepalived)
CGroup: / system.slice/keepalived.service
├─ 5124 / usr/sbin/keepalived-D
├─ 5125 / usr/sbin/keepalived-D
├─ 5126 / usr/sbin/keepalived-D
├─ 12057 / usr/sbin/keepalived-D
├─ 12058 / bin/bash / etc/keepalived/scripts/redis_backup.sh 127.0.0.1 10.0.37.225 6379
└─ 12061 sleep 15
Dec 03 21:56:26 ray0redis01 Keepalived_vrrp [5126]: / etc/keepalived/scripts/redis_check.sh exited with status 1
Dec 03 21:56:28 ray0redis01 Keepalived_vrrp [5126]: / etc/keepalived/scripts/redis_check.sh exited with status 1
Dec 03 21:56:30 ray0redis01 Keepalived_vrrp [5126]: / etc/keepalived/scripts/redis_check.sh exited with status 1
Dec 03 21:56:32 ray0redis01 Keepalived_vrrp [5126]: / etc/keepalived/scripts/redis_check.sh exited with status 1
Dec 03 21:56:34 ray0redis01 Keepalived_vrrp [5126]: / etc/keepalived/scripts/redis_check.sh exited with status 1
Dec 03 21:56:36 ray0redis01 Keepalived_vrrp [5126]: / etc/keepalived/scripts/redis_check.sh exited with status 1
Dec 03 21:56:38 ray0redis01 Keepalived_vrrp [5126]: VRRP_Script (chk_redis) succeeded
Dec 03 21:56:38 ray0redis01 Keepalived_vrrp [5126]: VRRP_Instance (redis) Entering BACKUP STATE
Dec 03 21:56:38 ray0redis01 Keepalived_vrrp [5126]: Opening script file / etc/keepalived/scripts/redis_backup.sh
Dec 03 21:56:39 ray0redis01 Keepalived_vrrp [5126]: VRRP_Instance (redis) forcing a new MASTER election
[root@ray0redis01 ~] #
[root@ray0redis01 ~] # systemctl status keepalived
● keepalived.service-LVS and VRRP High Availability Monitor
Loaded: loaded (/ usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
Active: active (running) since Mon 2018-12-03 20:41:42 EST; 1h 15min ago
Process: 5122 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 5124 (keepalived)
CGroup: / system.slice/keepalived.service
├─ 5124 / usr/sbin/keepalived-D
├─ 5125 / usr/sbin/keepalived-D
└─ 5126 / usr/sbin/keepalived-D
Dec 03 21:56:41 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:56:41 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:56:41 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:56:41 ray0redis01 Keepalived_vrrp [5126]: Opening script file / etc/keepalived/scripts/redis_master.sh
Dec 03 21:56:46 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:56:46 ray0redis01 Keepalived_vrrp [5126]: VRRP_Instance (redis) Sending/queueing gratuitous ARPs on ens192 for 10.0.37.226
Dec 03 21:56:46 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:56:46 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:56:46 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:56:46 ray0redis01 Keepalived_vrrp [5126]: Sending gratuitous ARP on ens192 for 10.0.37.226
[root@ray0redis01] # tail-f / var/log/keepalived-redis-state.log
Mon Dec 3 21:56:38 EST 2018
Run SLAVEOF cmd...
OK
[master]
Mon Dec 3 21:56:41 EST 2018
Being master....
Run MASTER cmd...
OK Already connected to specified master
Run SLAVEOF NO ONE cmd...
OK
[root@ray0redis02 ~] # systemctl status keepalived
● keepalived.service-LVS and VRRP High Availability Monitor
Loaded: loaded (/ usr/lib/systemd/system/keepalived.service; disabled; vendor preset: disabled)
Active: active (running) since Mon 2018-12-03 20:54:37 EST; 1h 2min ago
Process: 6112 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 6114 (keepalived)
CGroup: / system.slice/keepalived.service
├─ 6114 / usr/sbin/keepalived-D
├─ 6115 / usr/sbin/keepalived-D
└─ 6116 / usr/sbin/keepalived-D
Dec 03 21:54:44 ray0redis02 Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:54:44 ray0redis02 Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:54:44 ray0redis02 Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:54:44 ray0redis02 Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 03 21:56:38 ray0redis02 Keepalived_healthcheckers [6115]: TCP connection to [10.0.37.224]: 6379 success.
Dec 03 21:56:38 ray0redis02 Keepalived_healthcheckers [6115]: Adding service [10.0.37.224]: 6379 to VS [10.0.37.226]: 6379
Dec 03 21:56:39 ray0redis02 Keepalived_vrrp [6116]: VRRP_Instance (redis) Received advert with higher priority 100, ours 90
Dec 03 21:56:39 ray0redis02 Keepalived_vrrp [6116]: VRRP_Instance (redis) Entering BACKUP STATE
Dec 03 21:56:39 ray0redis02 Keepalived_vrrp [6116]: VRRP_Instance (redis) removing protocol VIPs.
Dec 03 21:56:39 ray0redis02 Keepalived_vrrp [6116]: Opening script file / etc/keepalived/scripts/redis_backup.sh
[root@ray0redis02] # tail-20f / var/log/messages
Dec 3 21:54:39 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:39 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:39 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:39 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:39 localhost NetworkManager: [1543892079.9698] policy: set-hostname: current hostname was changed outside NetworkManager: 'ray0redis02'
Dec 3 21:54:41 localhost Keepalived_healthcheckers [6115]: TCP connection to [10.0.37.224]: 6379 failed.
Dec 3 21:54:41 localhost Keepalived_healthcheckers [6115]: Check on service [10.0.37.224]: 6379 failed after 1 retry.
Dec 3 21:54:41 localhost Keepalived_healthcheckers [6115]: Removing service [10.0.37.224]: 6379 from VS [10.0.37.226]: 6379
Dec 3 21:54:44 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:44 localhost Keepalived_vrrp [6116]: VRRP_Instance (redis) Sending/queueing gratuitous ARPs on ens192 for 10.0.37.226
Dec 3 21:54:44 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:44 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:44 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:54:44 localhost Keepalived_vrrp [6116]: Sending gratuitous ARP on ens192 for 10.0.37.226
Dec 3 21:56:38 localhost Keepalived_healthcheckers [6115]: TCP connection to [10.0.37.224]: 6379 success.
Dec 3 21:56:38 localhost Keepalived_healthcheckers [6115]: Adding service [10.0.37.224]: 6379 to VS [10.0.37.226]: 6379
Dec 3 21:56:39 localhost Keepalived_vrrp [6116]: VRRP_Instance (redis) Received advert with higher priority 100, ours 90
Dec 3 21:56:39 localhost Keepalived_vrrp [6116]: VRRP_Instance (redis) Entering BACKUP STATE
Dec 3 21:56:39 localhost Keepalived_vrrp [6116]: VRRP_Instance (redis) removing protocol VIPs.
Dec 3 21:56:39 localhost NetworkManager: [1543892199.0770] policy: set-hostname: current hostname was changed outside NetworkManager: 'ray0redis02'
[root@ray0redis02] # tail-30 / var/log/keepalived-redis-state.log
Mon Dec 3 20:53:22 EST 2018
Run SLAVEOF cmd...
OK
[stop] 2018-12-03 20:54:37
[backup]
Mon Dec 3 20:54:37 EST 2018
Run SLAVEOF cmd...
OK
[master]
Mon Dec 3 20:55:59 EST 2018
Being master....
Run MASTER cmd...
OK Already connected to specified master
Run SLAVEOF NO ONE cmd...
OK
[backup]
Mon Dec 3 20:57:06 EST 2018
Run SLAVEOF cmd...
OK
[master]
Mon Dec 3 21:54:39 EST 2018
Being master....
Run MASTER cmd...
OK Already connected to specified master
Run SLAVEOF NO ONE cmd...
OK
[backup]
Mon Dec 3 21:56:39 EST 2018
Run SLAVEOF cmd...
OK
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