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只是一个请求转发功能的中间件，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，pg_auto_failover 集群，或者实现MySQL集群的代理等等。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。
图片来源于：https://docs.percona.com/postgresql/12/solutions/high-availability.html#architecture-layout
1，环境
Ubuntu08：192.168.152.115Ubuntu09：192.168.152.116Ubuntu10：192.168.152.117
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
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# make
Building 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 glibc
linux-musl - Modern Linux with musl
freebsd - FreeBSD
openbsd - OpenBSD
netbsd - NetBSD
osx - macOS
solaris - Solaris
Choose 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 connections
USE_ZLIB=1 - Support for HTTP response compression
USE_PCRE=1 - Support for PCRE regular expressions
USE_LUA=1 - Support for dynamic processing using Lua
Use '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: *** 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
global
log 127.0.0.1 local2
pidfile /var/run/haproxy.pid
maxconn 1000
daemon
defaults
mode tcp
retries 3
timeout client 10m
timeout connect 10s
timeout server 10m
timeout check 10s
listenstats
stats uri /
mode http
bind *:8080
stats enable
stats auth admin:admin
stats refresh 10s
listenpg_rw
bind *:6432
option httpchk
http-check expect status 200
default-server inter 3s rise 3 fall 2 on-marked-down shutdown-sessions
server ubuntu05 192.168.152.115:9000 check port 8008
server ubuntu06 192.168.152.116:9000 check port 8008
server ubuntu07 192.168.152.117:9000 check port 8008
listenpg_ro
bind *:6433
option httpchk GET /replica
http-check expect status 200
default-server inter 3s fall 3 rise 2 on-marked-down shutdown-sessions
balance roundrobin
server ubuntu05 192.168.152.115:9000 check port 8008
server ubuntu06 192.168.152.116:9000 check port 8008
server ubuntu07 192.168.152.117:9000 check port 8008关于HAProxy的另一种验证方式，请参考这里：https://blog.itpub.net/70041375/viewspace-3032961/ systemctl启动文件haproxy.service/etc/systemd/system/haproxy.service# /etc/systemd/system/haproxy.service
Description=HAProxy Load Balancer
After=network.target
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
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 Balancer
Loaded: loaded (/etc/systemd/system/haproxy.service; disabled; vendor preset: enabled)
Active: active (running) since Sun 2025-09-28 13:47:47 CST; 10s ago
Process: 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: 8.7M
CGroup: /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 -d
Sep 28 13:47:47 ubuntu08 haproxy: Using epoll() as the polling mechanism.
Sep 28 13:47:47 ubuntu08 haproxy: 00000000:MASTER.accept(0003)=0007 from ALPN=<none>
Sep 28 13:47:47 ubuntu08 haproxy: (858635) : Loading success.
Sep 28 13:47:47 ubuntu08 haproxy: 00000000:MASTER.srvcls
Sep 28 13:47:47 ubuntu08 haproxy: 00000001:MASTER.clicls
Sep 28 13:47:47 ubuntu08 haproxy: 00000001:MASTER.closed
Sep 28 13:47:47 ubuntu08 systemd: Started HAProxy Load Balancer.
Sep 28 13:47:47 ubuntu08 haproxy: (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) : 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) : 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/
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 psmisckeepalived服务文件：/etc/systemd/system/keepalived.server
Description=Keepalive Daemon (LVS and VRRP)
After=network-online.target
Wants=network-online.target
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
WantedBy=multi-user.targetUbuntu 08 keepalived配置文件：/usr/local/keepalived/etc/keepalived/keepalived.conf
global_defs {
router_id ubunt08
script_user root
enable_script_security
notification_syslog facility local1
}
vrrp_script chk_haproxy {
script "/usr/bin/killall -0 haproxy"
interval 2
weight 5
fall 30
rise 5
timeout 2
}
vrrp_instance VI_1 {
state MASTER #抢占模式
interface ens33
virtual_router_id 51
priority 100
advert_int 1
authentication {
auth_type PASS
auth_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 facility
notification_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.log
3，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 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:af:4a:a4 brd ff:ff:ff:ff:ff:ff
inet 192.168.152.115/24 brd 192.168.152.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.152.119/32 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:feaf:4aa4/64 scope link
valid_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 ago
Process: 868947 ExecStart=/usr/local/keepalived/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 868960 (keepalived)
Tasks: 2 (limit: 4550)
Memory: 1.8M
CGroup: /system.slice/keepalived.service
├─868960 /usr/local/keepalived/sbin/keepalived -D -S 0
└─868961 /usr/local/keepalived/sbin/keepalived -D -S 0
Sep 28 14:46:43 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:43 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:43 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:43 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:48 ubuntu08 Keepalived_vrrp: (VI_1) Sending/queueing gratuitous ARPs on ens33 for 192.168.152.119
Sep 28 14:46:48 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:48 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:48 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:48 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 14:46:48 ubuntu08 Keepalived_vrrp: 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 ubunt09
script_user root
enable_script_security
notification_syslog facility local1
}
vrrp_script chk_haproxy {
script "/usr/bin/killall -0 haproxy"
interval 2
weight 5
fall 3
rise 5
timeout 2
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 51
priority 90
advert_int 1
authentication {
auth_type PASS
auth_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 ubunt10
script_user root
enable_script_security
notification_syslog facility local1
}
vrrp_script chk_haproxy {
script "/usr/bin/killall -0 haproxy"
interval 2
weight 5
fall 3
rise 5
timeout 2
}
vrrp_instance VI_1 {
state BACKUP
interface ens33
virtual_router_id 51
priority 80
advert_int 1
authentication {
auth_type PASS
auth_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 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:af:4a:a4 brd ff:ff:ff:ff:ff:ff
inet 192.168.152.115/24 brd 192.168.152.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:feaf:4aa4/64 scope link
valid_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 ago
Process: 847309 ExecStart=/usr/local/keepalived/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 847324 (keepalived)
Tasks: 2 (limit: 4550)
Memory: 2.5M
CGroup: /system.slice/keepalived.service
├─847324 /usr/local/keepalived/sbin/keepalived -D -S 0
└─847325 /usr/local/keepalived/sbin/keepalived -D -S 0
Sep 28 16:16:51 ubuntu09 Keepalived_vrrp: (VI_1) Backup received priority 0 advertisement
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp: (VI_1) Receive advertisement timeout
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp: (VI_1) Entering MASTER STATE
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp: (VI_1) setting VIPs.
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp: (VI_1) Sending/queueing gratuitous ARPs on ens33 for 192.168.152.119
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:16:52 ubuntu09 Keepalived_vrrp: 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 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:4e:c2:b0 brd ff:ff:ff:ff:ff:ff
inet 192.168.152.116/24 brd 192.168.152.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.152.119/32 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe4e:c2b0/64 scope link
valid_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 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:af:4a:a4 brd ff:ff:ff:ff:ff:ff
inet 192.168.152.115/24 brd 192.168.152.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.152.119/32 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:feaf:4aa4/64 scope link
valid_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 ago
Process: 879342 ExecStart=/usr/local/keepalived/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 879356 (keepalived)
Tasks: 2 (limit: 4550)
Memory: 1.6M
CGroup: /system.slice/keepalived.service
├─879356 /usr/local/keepalived/sbin/keepalived -D -S 0
└─879358 /usr/local/keepalived/sbin/keepalived -D -S 0
Sep 28 16:19:11 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:11 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:11 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:11 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:16 ubuntu08 Keepalived_vrrp: (VI_1) Sending/queueing gratuitous ARPs on ens33 for 192.168.152.119
Sep 28 16:19:16 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:16 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:16 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:16 ubuntu08 Keepalived_vrrp: Sending gratuitous ARP on ens33 for 192.168.152.119
Sep 28 16:19:16 ubuntu08 Keepalived_vrrp: 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 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:4e:c2:b0 brd ff:ff:ff:ff:ff:ff
inet 192.168.152.116/24 brd 192.168.152.255 scope global ens33
valid_lft forever preferred_lft forever
inet 192.168.152.119/32 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe4e:c2b0/64 scope link
valid_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 1000
link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
inet 127.0.0.1/8 scope host lo
valid_lft forever preferred_lft forever
inet6 ::1/128 scope host
valid_lft forever preferred_lft forever
2: ens33: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
link/ether 00:0c:29:4e:c2:b0 brd ff:ff:ff:ff:ff:ff
inet 192.168.152.116/24 brd 192.168.152.255 scope global ens33
valid_lft forever preferred_lft forever
inet6 fe80::20c:29ff:fe4e:c2b0/64 scope link
valid_lft forever preferred_lft forever
root@ubuntu09:/usr/local/pg_install_package/haproxy-3.2.5#
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