PostgreSQL patroni 高可用 4：HAProxy和Keepalived实现读写分离

news/2025/9/28 19:37:41/文章来源:https://www.cnblogs.com/wy123/p/19117050

PostgreSQL patroni 高可用 4：HAProxy和Keepalived实现读写分离

PostgreSQL patroni高可用

PostgreSQL patroni 高可用 1：ectd 安装和配置
PostgreSQL patroni 高可用 2：patroni安装和配置
PostgreSQL patroni 高可用 3：patroni 运维
PostgreSQL patroni 高可用 4：HAProxy和Keepalived实现读写分离

 

PostgreSQL patroni 高可用 4：HAProxy和Keepalived实现读写分离
 
PostgreSQL ptroni的高可用架构图如下所示，本文完成如下架构图中红色标记内的HAProxy安装和配置，实际上是在每个节点都安装了HAProxy，然后用keepalived的方式，实现HAProxy自身的高可用。

需要特别说明的是：
1，HAProxy只是一个请求转发的功能，可以单独安装在一台独立的机器上，也可以跟PostgreSQL实例安装在一台机器上。
2，HAProxy并不是只能适配于Patroni，可以是任意类型的集群，比如基础的流复制，repmgr，PostgreSQL auto failover集群等等。
3，HAproxy自身也是一个单点的应用，所以其自身也需要高可用，因此本文会基于keepalived对HAproxy做高可用。
4，HAProxy在patroni高可用环境中，客户端的访问路径为：Application---》keepalived虚拟IP---》HAProxy---》patroni实例---》etcd存储---》PostgreSQL实例，可见这个链路比较长，每个组件都会带来一定的性能损耗。
 

image

图片来源于：https://docs.percona.com/postgresql/12/solutions/high-availability.html#architecture-layout

 

1，环境

Ubuntu08：192.168.152.115
Ubuntu09：192.168.152.116
Ubuntu10：192.168.152.117

patroni集群环境：
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4# patronictl -c /usr/local/pgsql16/patroni/patroni.yml list
+ Cluster: pg_cluster_wy_prod (7553485872297570126) ----+----+-----------+
| Member   | Host                 | Role    | State     | TL | Lag in MB |
+----------+----------------------+---------+-----------+----+-----------+
| ubuntu08 | 192.168.152.115:9000 | Replica | streaming |  5 |         0 |
| ubuntu09 | 192.168.152.116:9000 | Replica | streaming |  5 |         0 |
| ubuntu10 | 192.168.152.117:9000 | Leader  | running   |  5 |           |
+----------+----------------------+---------+-----------+----+-----------+
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4#
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4#
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4#

 

2，AHProxy安装

版本选择
https://www.haproxy.org/，版本信息如下，这里找一个长期支持版本（LTS）3.2

image

下载

wget https://www.haproxy.org/download/3.2/src/haproxy-3.2.5.tar.gz
tar -xzvf haproxy-3.2.5.tar.gz
cd haproxy-3.2.5/

编译安装

#编译选项，make编译会报错，提示出编译选项
root@ubuntu08:/usr/local/pg_install_package/haproxy-3.2.5# makeBuilding HAProxy without specifying a TARGET is not supported.
Usage:make help                       # To print a full explanation.make TARGET=xxx USE_<feature>=1 # To build HAProxy.The most commonly used targets are:linux-glibc    - Modern Linux with glibclinux-musl     - Modern Linux with muslfreebsd        - FreeBSDopenbsd        - OpenBSDnetbsd         - NetBSDosx            - macOSsolaris        - SolarisChoose the target which matches your OS the most in order to
gain the maximum performance out of it.Common features you might want to include in your build are:USE_OPENSSL=1 - Support for TLS encrypted connectionsUSE_ZLIB=1    - Support for HTTP response compressionUSE_PCRE=1    - Support for PCRE regular expressionsUSE_LUA=1     - Support for dynamic processing using LuaUse 'make help' to print a full explanation of supported targets
and features, and 'make ... opts' to show the variables in use
for a given set of build options, in a reusable form.make: *** [Makefile:933: all] Error 1
#编译
make -j $(nproc) TARGET=linux-glibc USE_OPENSSL=1 USE_QUIC=1 USE_QUIC_OPENSSL_COMPAT=1#安装，安装位置为：/usr/local/sbin
make install

 

3，HAProxy配置

haproxy三个节点完全一致，不需要修改，/etc/haproxy/haproxy.conf

globallog         127.0.0.1 local2       pidfile     /var/run/haproxy.pid   maxconn     1000                   daemon                            defaultsmode                    tcpretries                 3timeout client          10mtimeout connect         10stimeout server          10mtimeout check           10slisten  statsstats uri /mode httpbind *:8080stats enablestats auth admin:adminstats refresh 10slisten  pg_rwbind *:6432option httpchkhttp-check expect status 200default-server inter 3s rise 3 fall 2 on-marked-down shutdown-sessionsserver ubuntu05 192.168.152.115:9000 check port 8008server ubuntu06 192.168.152.116:9000 check port 8008server ubuntu07 192.168.152.117:9000 check port 8008listen  pg_robind *:6433option httpchk GET /replica	http-check expect status 200default-server inter 3s fall 3 rise 2 on-marked-down shutdown-sessionsbalance roundrobinserver ubuntu05 192.168.152.115:9000 check port 8008server ubuntu06 192.168.152.116:9000 check port 8008server ubuntu07 192.168.152.117:9000 check port 8008
systemctl启动文件haproxy.service
/etc/systemd/system/haproxy.service
# /etc/systemd/system/haproxy.service[Unit]
Description=HAProxy Load Balancer
After=network.target[Service]
Environment="CONFIG=/etc/haproxy/haproxy.conf" "PIDFILE=/var/run/haproxy.pid"
ExecStartPre=/usr/local/sbin/haproxy -f $CONFIG -c -q
ExecStart=/usr/local/sbin/haproxy -Ws -f $CONFIG -p $PIDFILE -d
ExecReload=/usr/local/sbin/haproxy -f $CONFIG -c -q
ExecReload=/bin/kill -USR2 $MAINPID
KillMode=mixed
Restart=always
SuccessExitStatus=143
Type=notify# The following lines leverage SystemD's sandboxing options to provide
# defense in depth protection at the expense of restricting some flexibility
# in your setup (e.g. placement of your configuration files) or possibly
# reduced performance. See systemd.service(5) and systemd.exec(5) for further
# information.# NoNewPrivileges=true
# ProtectHome=true
# If you want to use 'ProtectSystem=strict' you should whitelist the PIDFILE,
# any state files and any other files written using 'ReadWritePaths' or
# 'RuntimeDirectory'.
# ProtectSystem=true
# ProtectKernelTunables=true
# ProtectKernelModules=true
# ProtectControlGroups=true
# If your SystemD version supports them, you can add: @reboot, @swap, @sync
# SystemCallFilter=~@cpu-emulation @keyring @module @obsolete @raw-io[Install]
WantedBy=multi-user.target

启动服务

systemctl daemon-reload
systemctl enable haproxy
systemctl start haproxy
systemctl status haproxy

如果有异常，可以直接启动调试验证配置文件是否正常

/usr/local/sbin/haproxy -f /etc/haproxy/haproxy.conf -c -V

 

3，HAProxy代理使用

先从Ubuntu08：192.168.152.115开始安装，目前集群角色如下

root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4# patronictl -c /usr/local/pgsql16/patroni/patroni.yml list
+ Cluster: pg_cluster_wy_prod (7553485872297570126) ----+----+-----------+
| Member   | Host                 | Role    | State     | TL | Lag in MB |
+----------+----------------------+---------+-----------+----+-----------+
| ubuntu08 | 192.168.152.115:9000 | Replica | streaming |  5 |         0 |
| ubuntu09 | 192.168.152.116:9000 | Replica | streaming |  5 |         0 |
| ubuntu10 | 192.168.152.117:9000 | Leader  | running   |  5 |           |
+----------+----------------------+---------+-----------+----+-----------+
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4#
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4#
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4#

3.1，PostgreSQL集群的patroni状态检查

root@ubuntu08:/usr/local/pg_install_package#
root@ubuntu08:/usr/local/pg_install_package# curl -s "http://192.168.152.117:8008/leader" -v 2>&1|grep '200 OK'		#主节点检查正常
< HTTP/1.0 200 OK
root@ubuntu08:/usr/local/pg_install_package# curl -s "http://192.168.152.117:8008/replica" -v 2>&1|grep '200 OK'
root@ubuntu08:/usr/local/pg_install_package#
root@ubuntu08:/usr/local/pg_install_package# curl -s "http://192.168.152.115:8008/replica" -v 2>&1|grep '200 OK'	#从节点1检查正常
< HTTP/1.0 200 OK
root@ubuntu08:/usr/local/pg_install_package#
root@ubuntu08:/usr/local/pg_install_package# curl -s "http://192.168.152.116:8008/replica" -v 2>&1|grep '200 OK'	#从节点2检查正常
< HTTP/1.0 200 OK
root@ubuntu08:/usr/local/pg_install_package#

3.2，启动HAproxy

root@ubuntu08:/usr/local/pg_install_package# systemctl status haproxy
● haproxy.service - HAProxy Load BalancerLoaded: loaded (/etc/systemd/system/haproxy.service; disabled; vendor preset: enabled)Active: active (running) since Sun 2025-09-28 13:47:47 CST; 10s agoProcess: 858613 ExecStartPre=/usr/local/sbin/haproxy -f $CONFIG -c -q (code=exited, status=0/SUCCESS)Main PID: 858635 (haproxy)Status: "Ready."Tasks: 3 (limit: 4550)Memory: 8.7MCGroup: /system.slice/haproxy.service├─858635 /usr/local/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -d└─858639 /usr/local/sbin/haproxy -Ws -f /etc/haproxy/haproxy.cfg -p /var/run/haproxy.pid -dSep 28 13:47:47 ubuntu08 haproxy[858639]: Using epoll() as the polling mechanism.
Sep 28 13:47:47 ubuntu08 haproxy[858635]: 00000000:MASTER.accept(0003)=0007 from [unix:1] ALPN=<none>
Sep 28 13:47:47 ubuntu08 haproxy[858635]: [NOTICE]   (858635) : Loading success.
Sep 28 13:47:47 ubuntu08 haproxy[858635]: 00000000:MASTER.srvcls[0007:ffff]
Sep 28 13:47:47 ubuntu08 haproxy[858635]: 00000001:MASTER.clicls[0007:ffff]
Sep 28 13:47:47 ubuntu08 haproxy[858635]: 00000001:MASTER.closed[0007:ffff]
Sep 28 13:47:47 ubuntu08 systemd[1]: Started HAProxy Load Balancer.
Sep 28 13:47:47 ubuntu08 haproxy[858639]: [WARNING]  (858639) : Server pg_rw/ubuntu08 is DOWN, reason: Layer7 wrong status, code: 503, info: "Service Unavailable", check duration: 7ms. 2 active and 0>
Sep 28 13:47:47 ubuntu08 haproxy[858639]: [WARNING]  (858639) : Server pg_rw/ubuntu09 is DOWN, reason: Layer7 wrong status, code: 503, info: "Service Unavailable", check duration: 1ms. 1 active and 0>
Sep 28 13:47:49 ubuntu08 haproxy[858639]: [WARNING]  (858639) : Server pg_ro/ubuntu10 is DOWN, reason: Layer7 wrong status, code: 503, info: "Service Unavailable", check duration: 3ms. 2 active and 0>root@ubuntu08:/usr/local/pg_install_package#

3.3，HAproxy管理后台

HAproxy管理后台：http://192.168.152.115:8080/ 

image

3.4，读写分离测试

patronictl -c /usr/local/pgsql16/patroni/patroni.yml list查看集群状态

root@ubuntu10:/usr/local/pg_install_package# patronictl -c /usr/local/pgsql16/patroni/patroni.yml list
+ Cluster: pg_cluster_wy_prod (7553485872297570126) ----+----+-----------+
| Member   | Host                 | Role    | State     | TL | Lag in MB |
+----------+----------------------+---------+-----------+----+-----------+
| ubuntu08 | 192.168.152.115:9000 | Replica | streaming |  5 |         0 |
| ubuntu09 | 192.168.152.116:9000 | Replica | streaming |  5 |         0 |
| ubuntu10 | 192.168.152.117:9000 | Leader  | running   |  5 |           |
+----------+----------------------+---------+-----------+----+-----------+
root@ubuntu10:/usr/local/pg_install_package#

测试读写分析

#6432 读写端口号，一直重定向到主节点 192.168.152.117
root@ubuntu10:/usr/local/pg_install_package# psql "host=192.168.152.115 port=6432 user=postgres dbname=postgres password=******" -c 'select inet_server_addr(),pg_is_in_recovery()'inet_server_addr | pg_is_in_recovery
------------------+-------------------192.168.152.117  | f
(1 row)
#6432 读写端口号，一直重定向到主节点 192.168.152.117
root@ubuntu10:/usr/local/pg_install_package# psql "host=192.168.152.115 port=6432 user=postgres dbname=postgres password=******" -c 'select inet_server_addr(),pg_is_in_recovery()'inet_server_addr | pg_is_in_recovery
------------------+-------------------192.168.152.117  | f
(1 row)
#6433 只读端口号，一直重定向到主节点 192.168.152.115或者116
root@ubuntu10:/usr/local/pg_install_package#
root@ubuntu10:/usr/local/pg_install_package# psql "host=192.168.152.115 port=6433 user=postgres dbname=postgres password=******" -c 'select inet_server_addr(),pg_is_in_recovery()'inet_server_addr | pg_is_in_recovery
------------------+-------------------192.168.152.115  | t
(1 row)root@ubuntu10:/usr/local/pg_install_package#
root@ubuntu10:/usr/local/pg_install_package# psql "host=192.168.152.115 port=6433 user=postgres dbname=postgres password=******" -c 'select inet_server_addr(),pg_is_in_recovery()'inet_server_addr | pg_is_in_recovery
------------------+-------------------192.168.152.116  | t
(1 row)root@ubuntu10:/usr/local/pg_install_package#
root@ubuntu10:/usr/local/pg_install_package# psql "host=192.168.152.115 port=6433 user=postgres dbname=postgres password=******" -c 'select inet_server_addr(),pg_is_in_recovery()'inet_server_addr | pg_is_in_recovery
------------------+-------------------192.168.152.115  | t
(1 row)root@ubuntu10:/usr/local/pg_install_package# psql "host=192.168.152.115 port=6433 user=postgres dbname=postgres password=******" -c 'select inet_server_addr(),pg_is_in_recovery()'inet_server_addr | pg_is_in_recovery
------------------+-------------------192.168.152.116  | t
(1 row)root@ubuntu10:/usr/local/pg_install_package# psql "host=192.168.152.115 port=6433 user=postgres dbname=postgres password=******" -c 'select inet_server_addr(),pg_is_in_recovery()'inet_server_addr | pg_is_in_recovery
------------------+-------------------192.168.152.115  | t
(1 row)

 

 

4，keepalived安装

4.1 下载和安装

首先从Ubuntu08这台主机开始安装

wget https://keepalived.org/software/keepalived-2.3.4.tar.gz
#config
./configure --prefix=/usr/local/
#编译和安装
make && make install#安装psmisc
apt install -y psmisc

keepalived服务文件：/etc/systemd/system/keepalived.server

[Unit]
Description=Keepalive Daemon (LVS and VRRP)
After=network-online.target
Wants=network-online.target
[Service]
Type=forking
PIDFile=/run/keepalived.pid
KillMode=process
EnvironmentFile=/usr/local/keepalived/etc/sysconfig/keepalived
ExecStart=/usr/local/keepalived/sbin/keepalived $KEEPALIVED_OPTIONS
ExecReload=/bin/kill -HUP $MAINPID
[Install]
WantedBy=multi-user.target

Ubuntu 08 keepalived配置文件：/usr/local/keepalived/etc/keepalived/keepalived.conf

global_defs {router_id ubunt08script_user rootenable_script_securitynotification_syslog facility local1
}vrrp_script chk_haproxy {script "/usr/bin/killall -0 haproxy"interval 2weight 5fall 30rise 5timeout 2
}vrrp_instance VI_1 {state MASTER	#抢占模式interface ens33virtual_router_id 51priority 100advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.152.119}track_script {chk_haproxy}
}

 

4.2 keepalived日志设置

keepalived的环境变量配置默认在 yum/apt 安装的在 /etc/sysconfig/keepalived ，源码编译安装的在/usr/local/keepalived/etc/sysconfig/keepalived

1，修改keepalived.conf配置文件
global_defs {# 设置 syslog facilitynotification_syslog facility local1
}
这里的 local1 可以换成 local0 ~ local7 任意一个，但要和 rsyslog 里对应。2，编辑 /etc/rsyslog.d/keepalived.conf，增加一条规则，把 local1.* 的日志写到独立文件里：
local1.*    /var/log/keepalived.log3，保存后，重启 rsyslog：
sudo systemctl restart rsyslog

启动keepalived

systemctl daemon-reload
systemctl enable keepalived
systemctl start keepalived
systemctl status keepalived

 

4.3 keepalived绑定虚拟IP测试

root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope hostvalid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000link/ether 00:0c:29:af:4a:a4 brd ff:ff:ff:ff:ff:ffinet 192.168.152.115/24 brd 192.168.152.255 scope global ens33valid_lft forever preferred_lft foreverinet 192.168.152.119/32 scope global ens33valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:feaf:4aa4/64 scope linkvalid_lft forever preferred_lft forever
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4#
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4# systemctl status keepalived
● keepalived.service - Keepalive Daemon (LVS and VRRP)Loaded: loaded (/etc/systemd/system/keepalived.service; enabled; vendor preset: enabled)Active: active (running) since Sun 2025-09-28 14:46:40 CST; 2min 9s agoProcess: 868947 ExecStart=/usr/local/keepalived/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)Main PID: 868960 (keepalived)Tasks: 2 (limit: 4550)Memory: 1.8MCGroup: /system.slice/keepalived.service├─868960 /usr/local/keepalived/sbin/keepalived -D -S 0└─868961 /usr/local/keepalived/sbin/keepalived -D -S 0Sep 28 14:46:43 ubuntu08 Keepalived_vrrp[868961]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:43 ubuntu08 Keepalived_vrrp[868961]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:43 ubuntu08 Keepalived_vrrp[868961]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:43 ubuntu08 Keepalived_vrrp[868961]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:48 ubuntu08 Keepalived_vrrp[868961]: (VI_1) Sending/queueing gratuitous ARPs on ens33 for 192.168.152.119
Sep 28 14:46:48 ubuntu08 Keepalived_vrrp[868961]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:48 ubuntu08 Keepalived_vrrp[868961]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:48 ubuntu08 Keepalived_vrrp[868961]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:48 ubuntu08 Keepalived_vrrp[868961]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:48 ubuntu08 Keepalived_vrrp[868961]: Sending gratuitous ARP on ens33 for 192.168.152.119
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4#

ubunt09 keepalived配置文件（修改router_id，state，priority）

global_defs {router_id ubunt09script_user rootenable_script_securitynotification_syslog facility local1
}vrrp_script chk_haproxy {script "/usr/bin/killall -0 haproxy"interval 2weight 5fall 3rise 5timeout 2
}vrrp_instance VI_1 {state BACKUPinterface ens33virtual_router_id 51priority 90advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.152.119}track_script {chk_haproxy}
}

ubunt10 keepalived配置文件（修改router_id，state，priority）

global_defs {router_id ubunt10script_user rootenable_script_securitynotification_syslog facility local1
}vrrp_script chk_haproxy {script "/usr/bin/killall -0 haproxy"interval 2weight 5fall 3rise 5timeout 2
}vrrp_instance VI_1 {state BACKUPinterface ens33virtual_router_id 51priority 80advert_int 1authentication {auth_type PASSauth_pass 1111}virtual_ipaddress {192.168.152.119}track_script {chk_haproxy}
}

 

4.4 keepalived虚拟IP飘移测试

1，Ubuntu08主节点关闭keepalived

root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4# systemctl stop keepalived
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4#
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope hostvalid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000link/ether 00:0c:29:af:4a:a4 brd ff:ff:ff:ff:ff:ffinet 192.168.152.115/24 brd 192.168.152.255 scope global ens33valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:feaf:4aa4/64 scope linkvalid_lft forever preferred_lft forever
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4#

2，Ubuntu09节点接替keepalived 

root@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5#
root@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5# systemctl status keepalived
● keepalived.service - Keepalive Daemon (LVS and VRRP)Loaded: loaded (/etc/systemd/system/keepalived.service; enabled; vendor preset: enabled)Active: active (running) since Sun 2025-09-28 16:16:21 CST; 33s agoProcess: 847309 ExecStart=/usr/local/keepalived/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)Main PID: 847324 (keepalived)Tasks: 2 (limit: 4550)Memory: 2.5MCGroup: /system.slice/keepalived.service├─847324 /usr/local/keepalived/sbin/keepalived -D -S 0└─847325 /usr/local/keepalived/sbin/keepalived -D -S 0Sep 28 16:16:51 ubuntu09 Keepalived_vrrp[847325]: (VI_1) Backup received priority 0 advertisement
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp[847325]: (VI_1) Receive advertisement timeout
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp[847325]: (VI_1) Entering MASTER STATE
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp[847325]: (VI_1) setting VIPs.
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp[847325]: (VI_1) Sending/queueing gratuitous ARPs on ens33 for 192.168.152.119
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp[847325]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp[847325]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp[847325]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp[847325]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp[847325]: Sending gratuitous ARP on ens33 for 192.168.152.119
root@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5#
root@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope hostvalid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000link/ether 00:0c:29:4e:c2:b0 brd ff:ff:ff:ff:ff:ffinet 192.168.152.116/24 brd 192.168.152.255 scope global ens33valid_lft forever preferred_lft foreverinet 192.168.152.119/32 scope global ens33valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:fe4e:c2b0/64 scope linkvalid_lft forever preferred_lft forever
root@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5#

3，Ubuntu08主节点启动keepalived，抢回虚拟ip

root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4# systemctl start keepalived
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope hostvalid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000link/ether 00:0c:29:af:4a:a4 brd ff:ff:ff:ff:ff:ffinet 192.168.152.115/24 brd 192.168.152.255 scope global ens33valid_lft forever preferred_lft foreverinet 192.168.152.119/32 scope global ens33valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:feaf:4aa4/64 scope linkvalid_lft forever preferred_lft forever
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4# systemctl status keepalived
● keepalived.service - Keepalive Daemon (LVS and VRRP)Loaded: loaded (/etc/systemd/system/keepalived.service; enabled; vendor preset: enabled)Active: active (running) since Sun 2025-09-28 16:19:07 CST; 18s agoProcess: 879342 ExecStart=/usr/local/keepalived/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)Main PID: 879356 (keepalived)Tasks: 2 (limit: 4550)Memory: 1.6MCGroup: /system.slice/keepalived.service├─879356 /usr/local/keepalived/sbin/keepalived -D -S 0└─879358 /usr/local/keepalived/sbin/keepalived -D -S 0Sep 28 16:19:11 ubuntu08 Keepalived_vrrp[879358]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:11 ubuntu08 Keepalived_vrrp[879358]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:11 ubuntu08 Keepalived_vrrp[879358]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:11 ubuntu08 Keepalived_vrrp[879358]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:16 ubuntu08 Keepalived_vrrp[879358]: (VI_1) Sending/queueing gratuitous ARPs on ens33 for 192.168.152.119
Sep 28 16:19:16 ubuntu08 Keepalived_vrrp[879358]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:16 ubuntu08 Keepalived_vrrp[879358]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:16 ubuntu08 Keepalived_vrrp[879358]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:16 ubuntu08 Keepalived_vrrp[879358]: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:16 ubuntu08 Keepalived_vrrp[879358]: Sending gratuitous ARP on ens33 for 192.168.152.119
root@ubuntu08:/usr/local/pg_install_package/keepalived-2.3.4#

4，Ubuntu09上的虚拟IP被抢回（Ubuntu08主节点启动keepalived，抢回虚拟ip）

oot@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope hostvalid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000link/ether 00:0c:29:4e:c2:b0 brd ff:ff:ff:ff:ff:ffinet 192.168.152.116/24 brd 192.168.152.255 scope global ens33valid_lft forever preferred_lft foreverinet 192.168.152.119/32 scope global ens33valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:fe4e:c2b0/64 scope linkvalid_lft forever preferred_lft forever
root@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5# ip addr
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00inet 127.0.0.1/8 scope host lovalid_lft forever preferred_lft foreverinet6 ::1/128 scope hostvalid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000link/ether 00:0c:29:4e:c2:b0 brd ff:ff:ff:ff:ff:ffinet 192.168.152.116/24 brd 192.168.152.255 scope global ens33valid_lft forever preferred_lft foreverinet6 fe80::20c:29ff:fe4e:c2b0/64 scope linkvalid_lft forever preferred_lft forever
root@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5#
 

4.5 通过虚拟IP连接至PostgreSQL集群测试

#通过虚拟IP，RW端口号，总是转发到主节点
root@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5# psql "host=192.168.152.119 port=6432 user=postgres dbname=postgres password=******" -c 'select inet_server_addr(),pg_is_in_recovery()'inet_server_addr | pg_is_in_recovery
------------------+-------------------192.168.152.117  | f
(1 row)#通过虚拟IP，RW端口号，总是转发到主节点
root@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5# psql "host=192.168.152.119 port=6432 user=postgres dbname=postgres password=******" -c 'select inet_server_addr(),pg_is_in_recovery()'inet_server_addr | pg_is_in_recovery
------------------+-------------------192.168.152.117  | f
(1 row)#通过虚拟IP，RW端口号，总是转发到主节点
root@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5# psql "host=192.168.152.119 port=6432 user=postgres dbname=postgres password=******" -c 'select inet_server_addr(),pg_is_in_recovery()'inet_server_addr | pg_is_in_recovery
------------------+-------------------192.168.152.117  | f
(1 row)#通过虚拟IP，RO端口号，轮训转发到从节点
root@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5# psql "host=192.168.152.119 port=6433 user=postgres dbname=postgres password=******" -c 'select inet_server_addr(),pg_is_in_recovery()'inet_server_addr | pg_is_in_recovery
------------------+-------------------192.168.152.116  | t
(1 row)root@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5# psql "host=192.168.152.119 port=6433 user=postgres dbname=postgres password=******" -c 'select inet_server_addr(),pg_is_in_recovery()'inet_server_addr | pg_is_in_recovery
------------------+-------------------192.168.152.115  | t
(1 row)root@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5# psql "host=192.168.152.119 port=6433 user=postgres dbname=postgres password=******" -c 'select inet_server_addr(),pg_is_in_recovery()'inet_server_addr | pg_is_in_recovery
------------------+-------------------192.168.152.116  | t
(1 row)root@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5# psql "host=192.168.152.119 port=6433 user=postgres dbname=postgres password=******" -c 'select inet_server_addr(),pg_is_in_recovery()'inet_server_addr | pg_is_in_recovery
------------------+-------------------192.168.152.115  | t
(1 row)

 

本文来自互联网用户投稿，该文观点仅代表作者本人，不代表本站立场。本站仅提供信息存储空间服务，不拥有所有权，不承担相关法律责任。如若转载，请注明出处：http://www.mzph.cn/news/921046.shtml

如若内容造成侵权/违法违规/事实不符，请联系多彩编程网进行投诉反馈email:809451989@qq.com，一经查实，立即删除！

相关文章

商城网站做推广wordpress woo

商城网站做推广wordpress woo

这篇文章非常好&#xff0c;必须转载。目录(?)[-] Kernel Space Display架构介绍函数和数据结构介绍函数和数据结构介绍函数和数据结构介绍数据流分析初始化过程分析User Space display接口Kernel display接口典型应用flow分析介绍 Surface manager&#xff08;surface flinge…
阅读更多...
c 网站开发数据库连接网站优化推广招聘

c 网站开发数据库连接网站优化推广招聘

原文来源&#xff1a;arXiv作者&#xff1a;Aidin Ferdowsi、 Ursula Challita、Walid Saad、Narayan B. Mandayam「雷克世界」编译&#xff1a;嗯~是阿童木呀、KABUDA对于自动驾驶汽车&#xff08;AV&#xff09;而言&#xff0c;要想在未来的智能交通系统中以真正自主的方式运…
阅读更多...
各大网站收录提交入口网站服务器 安全

各大网站收录提交入口网站服务器 安全

在 CentOS 7 中设置系统级代理需要几个步骤。以下是设置系统级代理的方法&#xff1a; 设置环境变量: 编辑 /etc/environment 文件&#xff1a; sudo nano /etc/environment添加以下行&#xff08;替换 proxy_server 和 port 为您的实际代理服务器地址和端口&#xff09;&am…
阅读更多...
Cloudbox工具箱!一款拥有100款工具的超级工具箱!Cloudbox工具箱教程（附下载）

Cloudbox工具箱!一款拥有100款工具的超级工具箱!Cloudbox工具箱教程（附下载）

软件介绍 Cloudbox 工具箱：一款开源免费的 Windows 聚合工具箱，仅 7.6M 大小却集成 198 款工具，涵盖装机检测、系统优化、影音下载等四大类功能，提供绿色免安装软件，能简化装机流程，降低流氓软件捆绑风险。 软件…
阅读更多...
java 语法基础课后作业

java 语法基础课后作业

1:仔细阅读示例: EnumTest.java，运行它，分析运行结果？ 你能得到什么结论？你掌握了枚举类型的基本用法了吗？import java.util.*; public enum MyEnum{ ONE, TWO, THREE } class Main{ public static void main(Str…
阅读更多...
成都做网站的工资多少如何创立自己的网站

成都做网站的工资多少如何创立自己的网站

我这个错误是跑完MRP&#xff0c;然后在MD04查看在库/所有量一览&#xff0c; 点计划手配&#xff08;Planned order 计划订单&#xff09;生成 制造指图&#xff08;Production order 生产订单&#xff09;&#xff0c; 到目前这几步都OK&#xff0c;然后在制造指图界面点保…
阅读更多...
Lightroom使用教程!一文学会Lightroom使用教程！软件攻略（批量处理）

Lightroom使用教程!一文学会Lightroom使用教程！软件攻略（批量处理）

软件介绍 Lightroom是Adobe Systems开发的一款专业的照片编辑和管理软件，专为摄影师和图像处理专业人士设计。lr修图软件携带的桥正工具，组织功能以及灵活的打印选项，可以帮助用户加快图片后期处理速度，将更多时间…
阅读更多...
C++篇 String实现避坑指南：搞定构造，拷贝与析构，增删查改，流提取流插入与比对大小 一文全解 - 教程

C++篇 String实现避坑指南：搞定构造，拷贝与析构，增删查改，流提取流插入与比对大小 一文全解 - 教程

C++篇 String实现避坑指南：搞定构造，拷贝与析构，增删查改，流提取流插入与比对大小 一文全解 - 教程pre { white-space: pre !important; word-wrap: normal !important; overflow-x: auto !important; display: bl…
阅读更多...
深入解析：基于机器学习的智能贫血分析预测系统

深入解析：基于机器学习的智能贫血分析预测系统

pre { white-space: pre !important; word-wrap: normal !important; overflow-x: auto !important; display: block !important; font-family: "Consolas", "Monaco", "Courier New", …
阅读更多...
AT_agc026_c [AGC026C] String Coloring

AT_agc026_c [AGC026C] String Coloring

首先考虑 \(n \le 18\)，折半搜索。 用哈希，发现就是进制数合并，用 map 记录正着和反着的哈希值折半合并即可。
阅读更多...
苏州市建设交易中心网站首页wpzoom wordpress cms

苏州市建设交易中心网站首页wpzoom wordpress cms

Go 使用 Gorm 将操作信息集成到链路跟踪 Jaeger，进行增删改查使用举例（附源码）。 为了增强程序的可观测性，方便问题定位，在发起数据库操作请求时我们也可以调用代码统一集成链路跟踪的能力，Jaeger 是当今比较流行的选择。使用 Gorm 来将操作信息集成到 Jaeger 中。 全面…
阅读更多...
启发式合并 [PA 2014] Fiolki

启发式合并 [PA 2014] Fiolki

关于启发式合并 在我们愉快打暴力的时候，我们会遇到需要合并一些数据的情况。 我们举一个相当简单的例子，我们需要很多次合并一些 vector，这个时候作为人类我们会想从小的里边取放到大的里边。 若我们需要大到小，就…
阅读更多...
反转链表-leetcode

反转链表-leetcode

题目描述 给你单链表的头节点 head ，请你反转链表，并返回反转后的链表。 示例 1：输入：head = [1,2,3,4,5] 输出：[5,4,3,2,1]示例 2：输入：head = [1,2] 输出：[2,1]示例 3： 输入：head = [] 输出：[]提示：链表…
阅读更多...
旅游网站建设方案后台组件化网站建设

旅游网站建设方案后台组件化网站建设

为什么实际开发中不推荐使用外键&#xff1f; 只有一个场景不能使用外键&#xff0c;就是分库分表&#xff0c;其它描述都不是真正原因。 性能问题&#xff1f; 数据库的瓶颈在IO&#xff0c;不使用外键代码里做数据完整性检查&#xff0c;磁盘IO省不了&#xff0c;网络IO占用…
阅读更多...
深圳seo网站设计一元钱购买网站空间

深圳seo网站设计一元钱购买网站空间

目录 1 下载Qt 1.1 官方下载 1.2 百度网盘下载 1.3 Linux虚拟机终端下载 2 Qt安装 3 安装相关依赖 4 测试安装 1 下载Qt 1.1 官方下载 通过官网下载对应版本&#xff0c;本文选择的版本为qt-opensource-linux-x64-5.12.12&#xff0c;Qt官方下载链接&#xff1a;htt…
阅读更多...
php 网站开发框架apps 制作网站

php 网站开发框架apps 制作网站

来源&#xff1a;DeepTech深科技近日&#xff0c;苹果官方发布一份招聘信息&#xff0c;其中有一个职位就非常惹人注意&#xff0c;根据信息&#xff0c;苹果准备招募两名蜂窝调制解调器系统架构师&#xff0c;一名构架师的工作地点在圣克拉拉&#xff0c;另一名构架师的工作地…
阅读更多...
专业网站建设费用包括哪些wordpress文字块

专业网站建设费用包括哪些wordpress文字块

&#x1f3a5;博主&#xff1a;程序员不想YY啊 &#x1f4ab;CSDN优质创作者&#xff0c;CSDN实力新星&#xff0c;CSDN博客专家 &#x1f917;点赞&#x1f388;收藏⭐再看&#x1f4ab;养成习惯 ✨希望本文对您有所裨益&#xff0c;如有不足之处&#xff0c;欢迎在评论区提出…
阅读更多...
完整教程：Nginx HTTPS 深入实战 配置、性能与排查全流程（Nginx https

完整教程：Nginx HTTPS 深入实战 配置、性能与排查全流程（Nginx https

完整教程：Nginx HTTPS 深入实战 配置、性能与排查全流程（Nginx httpspre { white-space: pre !important; word-wrap: normal !important; overflow-x: auto !important; display: block !important; font-family: &…
阅读更多...
第45篇：AI+交通：自动驾驶、智能交通管理与出行优化 - 实践

第45篇：AI+交通：自动驾驶、智能交通管理与出行优化 - 实践

第45篇：AI+交通：自动驾驶、智能交通管理与出行优化 - 实践pre { white-space: pre !important; word-wrap: normal !important; overflow-x: auto !important; display: block !important; font-family: "Conso…
阅读更多...
完整教程：ISP的前处理和后处理是什么？

完整教程：ISP的前处理和后处理是什么？

pre { white-space: pre !important; word-wrap: normal !important; overflow-x: auto !important; display: block !important; font-family: "Consolas", "Monaco", "Courier New", …
阅读更多...
最新文章

Copyright @ 2022~2023