当systemd不刷新主PID时，我遇到了一个问题：
keepalived以及keepalived.service和keepalived.service.conf的状态如下：
[root@rhel7_36 ~]# systemctl status keepalived -l
● keepalived.service - LVS and VRRP High Availability Monitor
Loaded: loaded (/usr/lib/systemd/system/keepalived.service; enabled; vendor preset: disabled)
Drop-In: /etc/systemd/system/keepalived.service.d
└─keepalived.service.conf
Active: active (running) since Thu 2020-07-09 18:21:18 GMT; 42s ago
Process: 1173 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 1176 (keepalived)
CGroup: /system.slice/keepalived.service
├─1176 /usr/sbin/keepalived -D
├─1177 /usr/sbin/keepalived -D
├─1178 /usr/sbin/keepalived -D
├─1695 /usr/sbin/keepalived -D
├─1696 /usr/sbin/keepalived -D
├─1697 sh -c /bin/ping -q -c 5 -W 1 192.168.X.X >/dev/null
├─1698 sh -c /bin/ping -q -c 5 -W 1 192.168.X.X >/dev/null
├─1699 /bin/ping -q -c 5 -W 1 192.168.X.X
└─1700 /bin/ping -q -c 5 -W 1 192.168.X.X
Jul 09 18:21:20 rhel7_36 Keepalived_vrrp[1178]: VRRP_Group(VG_PREAUTH) Syncing instances to FAULT state
Jul 09 18:21:20 rhel7_36 Keepalived_vrrp[1178]: Opening script file /usr/libexec/keepalived/stateNotify.py
Jul 09 18:21:22 rhel7_36 Keepalived_vrrp[1178]: VRRP_Script(icmp_to_eth1_router) succeeded
Jul 09 18:21:22 rhel7_36 Keepalived_vrrp[1178]: VRRP_Script(icmp_to_eth0_router) succeeded
Jul 09 18:21:23 rhel7_36 Keepalived_vrrp[1178]: Kernel is reporting: Group(VG_PREAUTH) UP
Jul 09 18:21:23 rhel7_36 Keepalived_vrrp[1178]: VRRP_Group(VG_PREAUTH) Leaving FAULT state
Jul 09 18:21:23 rhel7_36 Keepalived_vrrp[1178]: VRRP_Instance(VI_eth1) Entering BACKUP STATE
Jul 09 18:21:23 rhel7_36 Keepalived_vrrp[1178]: VRRP_Group(VG_PREAUTH) Syncing instances to BACKUP state
Jul 09 18:21:23 rhel7_36 Keepalived_vrrp[1178]: VRRP_Instance(VI_eth0) Entering BACKUP STATE
Jul 09 18:21:23 rhel7_36 Keepalived_vrrp[1178]: Opening script file /usr/libexec/keepalived/stateNotify.py
[root@rhel7_36 ~]# systemctl cat keepalived
# /usr/lib/systemd/system/keepalived.service
[Unit]
Description=LVS and VRRP High Availability Monitor
After=syslog.target network-online.target
[Service]
Type=forking
PIDFile=/var/run/keepalived.pid
KillMode=process
EnvironmentFile=-/etc/sysconfig/keepalived
ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS
ExecReload=/bin/kill -HUP $MAINPID
[Install]
WantedBy=multi-user.target
# /etc/systemd/system/keepalived.service.d/keepalived.service.conf
[Service]
Environment="INSTALL_DIR=/opt/edge"
Nice=-10
Restart=on-failure
RestartSec=20
现在我正在执行pkill -9 keepalived，以便keepalived在20秒内自行启动。它第一次执行此操作，并且keepalived的状态如下所示
[root@rhel7_36 ~]# systemctl status keepalived -l
● keepalived.service - LVS and VRRP High Availability Monitor
Loaded: loaded (/usr/lib/systemd/system/keepalived.service; enabled; vendor preset: disabled)
Drop-In: /etc/systemd/system/keepalived.service.d
└─keepalived.service.conf
Active: active (running) since Thu 2020-07-09 18:27:36 GMT; 4min 19s ago
Process: 1910 ExecReload=/bin/kill -HUP $MAINPID (code=exited, status=0/SUCCESS)
Process: 2377 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 1176 (code=killed, signal=KILL)
CGroup: /system.slice/keepalived.service
├─2378 /usr/sbin/keepalived -D
├─2379 /usr/sbin/keepalived -D
└─2380 /usr/sbin/keepalived -D
Jul 09 18:27:38 rhel7_36 Keepalived_vrrp[2380]: VRRP_Group(VG_PREAUTH) Syncing instances to FAULT state
Jul 09 18:27:38 rhel7_36 Keepalived_vrrp[2380]: Opening script file /usr/libexec/keepalived/stateNotify.py
Jul 09 18:27:41 rhel7_36 Keepalived_vrrp[2380]: VRRP_Script(icmp_to_eth0_router) succeeded
Jul 09 18:27:41 rhel7_36 Keepalived_vrrp[2380]: VRRP_Script(icmp_to_eth1_router) succeeded
Jul 09 18:27:41 rhel7_36 Keepalived_vrrp[2380]: Kernel is reporting: Group(VG_PREAUTH) UP
Jul 09 18:27:41 ehel7_36 Keepalived_vrrp[2380]: VRRP_Group(VG_PREAUTH) Leaving FAULT state
Jul 09 18:27:41 rhel7_36 Keepalived_vrrp[2380]: VRRP_Instance(VI_eth1) Entering BACKUP STATE
Jul 09 18:27:41 rhel7_36 Keepalived_vrrp[2380]: VRRP_Group(VG_PREAUTH) Syncing instances to BACKUP state
Jul 09 18:27:41 rhel7_36 Keepalived_vrrp[2380]: VRRP_Instance(VI_eth0) Entering BACKUP STATE
Jul 09 18:27:41 rhel7_36 Keepalived_vrrp[2380]: Opening script file /usr/libexec/keepalived/stateNotify.py
如您所见，主PID未刷新。
我在/usr/lib/systemd/system/keepalived.service中包含PIDFile，并且还存在/var/run/keepalived.pid文件。
现在它也将无法重新加载keepalived。我很困惑为什么它没有刷新PID。
[root@rhel7_36 ~]# systemctl reload keepalived
Job for keepalived.service failed because the control process exited with error code. See "systemctl status keepalived.service" and "journalctl -xe" for details.
[root@rhel7_36 ~]# systemctl status keepalived
● keepalived.service - LVS and VRRP High Availability Monitor
Loaded: loaded (/usr/lib/systemd/system/keepalived.service; enabled; vendor preset: disabled)
Drop-In: /etc/systemd/system/keepalived.service.d
└─keepalived.service.conf
Active: active (running) (Result: exit-code) since Thu 2020-07-09 18:27:36 GMT; 7min ago
Process: 3329 ExecReload=/bin/kill -HUP $MAINPID (code=exited, status=1/FAILURE)
Process: 2377 ExecStart=/usr/sbin/keepalived $KEEPALIVED_OPTIONS (code=exited, status=0/SUCCESS)
Main PID: 1176 (code=killed, signal=KILL)
CGroup: /system.slice/keepalived.service
├─2378 /usr/sbin/keepalived -D
├─2379 /usr/sbin/keepalived -D
├─2380 /usr/sbin/keepalived -D
├─3344 /usr/sbin/keepalived -D
├─3345 /usr/sbin/keepalived -D
├─3346 sh -c /bin/ping -q -c 5 -W 1 192.168.X.X >/dev/null
├─3347 sh -c /bin/ping -q -c 5 -W 1 192.168.X.X >/dev/null
├─3348 /bin/ping -q -c 5 -W 1 192.168.X.X
└─3349 /bin/ping -q -c 5 -W 1 192.168.X.X
Jul 09 18:35:08 rhel7_36 kill[3329]: -s, --signal <sig> send sp...l
Jul 09 18:35:08 rhel7_36 kill[3329]: -q, --queue <sig> use sig...)
Jul 09 18:35:08 rhel7_36 kill[3329]: -p, --pid print p...m
Jul 09 18:35:08 rhel7_36 kill[3329]: -l, --list [=<signal>] list si...e
Jul 09 18:35:08 rhel7_36 kill[3329]: -L, --table list si...s
Jul 09 18:35:09 rhel7_36 kill[3329]: -h, --help display this he...t
Jul 09 18:35:09 rhel7_36 kill[3329]: -V, --version output version ...t
Jul 09 18:35:09 rhel7_36 kill[3329]: For more details see kill(1).
Jul 09 18:35:08 rhel7_36 systemd[1]: keepalived.service: control pr...1
Jul 09 18:35:08 rhel7_36 systemd[1]: Reload failed for LVS and VRRP....
Hint: Some lines were ellipsized, use -l to show in full.
[root@rhel7_36 ~]# journalctl -xe
Jul 09 18:35:08 rhel7_36 systemd[1]: keepalived.service: control proces
Jul 09 18:35:08 rhel7_36 systemd[1]: Reload failed for LVS and VRRP Hig
-- Subject: Unit keepalived.service has finished reloading its configuration
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit keepalived.service has finished reloading its configuration
--
-- The result is failed.
Jul 09 18:35:55 rhel7_36 systemd[1]: Starting Cleanup of Temporary Dire
-- Subject: Unit systemd-tmpfiles-clean.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit systemd-tmpfiles-clean.service has begun starting up.
Jul 09 18:35:55 rhel7_36 systemd[1]: Started Cleanup of Temporary Direc
-- Subject: Unit systemd-tmpfiles-clean.service has finished start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit systemd-tmpfiles-clean.service has finished starting up.
--
-- The start-up result is done
keepalived版本
Keepalived v1.3.5 (03/19,2017), git commit v1.3.5-6-g6fa32f2
任何输入都有助于理解和纠正此问题。
谢谢!!!