运行 Ubuntu 17.04,我想要一个 systemctl
服务来监督一个主要的 bash
脚本,其中三个程序(这里由虚拟脚本 foo_script 代替)
标记有参数)在无限循环下运行(因为可能的程序崩溃)。
主脚本 foo_main.sh
如果从命令行调用则可以正常工作;但是我尝试从中设置的服务很快就会崩溃。
文件foo_script.sh
:
#!/bin/bash
echo "FooScripting "$1 >> "foo.d/"$1
文件loop.sh
:
#!/bin/bash
nLoop=0
prgName=$1
prgArg=$2
echo "<< START of "${prgName} ${prgArg}" loop >>"
while :
do
let nLoop=nLoop+1
echo "<< looping "${prgName} ${prgArg}" >>" ${nLoop}
"./"${prgName} ${prgArg}
sleep 1
done
echo "<< END of "${prgName} ${prgArg}" loop >>"
文件foo_main.sh
:
#!/bin/bash
echo "foo_main start in "${PWD}
./loop.sh "foo_script.sh" "fb" &
sleep 2
./loop.sh "foo_script.sh" "gc" &
./loop.sh "foo_script.sh" "gb" &
echo "foo_main end"
文件 /etc/systemd/system/food.service
:
[Unit]
Description = Foo Daemon
After = network.target
[Service]
Type = simple
# User = <<USER>>
# PIDFile=/var/food.pid
WorkingDirectory = /home/john/bin
ExecStart = /home/john/bin/foo_main.sh
# ExecStop = killall loop.sh
# ExecReload = killall loop.sh && /home/john/bin/foo_main.sh
# Restart = on-abort
[Install]
WantedBy = multi-user.target
我从每个 sudo systemctl status food.service
(在 start
ofc 之后)获得的输出几乎相同
● food.service - Foo Daemon
Loaded: loaded (/etc/systemd/system/food.service; disabled; vendor preset: enabled)
Active: inactive (dead)
Sep 28 14:54:30 john-host systemd[1]: Started Foo Daemon.
Sep 28 14:54:30 john-host foo_main.sh[7376]: foo_main script start in /home/john/bin
Sep 28 14:54:30 john-host foo_main.sh[7376]: << START of foo_script.sh fb loop >>
Sep 28 14:54:30 john-host foo_main.sh[7376]: << looping foo_script.sh fb >> 1
Sep 28 14:54:31 john-host foo_main.sh[7376]: << looping foo_script.sh fb >> 2
Sep 28 14:54:32 john-host foo_main.sh[7376]: foo_main script end
Sep 28 15:24:30 john-host foo_main.sh[7921]: << START of foo_script.sh gb loop >>
Sep 28 15:24:30 john-host foo_main.sh[7921]: << START of foo_script.sh gc loop >>
Sep 28 15:24:30 john-host foo_main.sh[7921]: << looping foo_script.sh gb >> 1
Sep 28 15:24:30 john-host foo_main.sh[7921]: << looping foo_script.sh gc >> 1
最佳答案
另一种解决方案是在 /etc/systemd/system/food.service
中使用 Type=oneshot
+ RemainAfterExit=yes
p>
看https://www.freedesktop.org/software/systemd/man/systemd.service.html引用 onshot 服务类型。
像下面这样的服务文件应该也能解决您的问题。
[Unit]
Description = Foo Daemon
After = network.target
[Service]
Type = oneshot
RemainAfterExit=yes
# User = <<USER>>
# PIDFile=/var/food.pid
WorkingDirectory = /home/john/bin
ExecStart = /home/john/bin/foo_main.sh
# ExecStop = killall loop.sh
# ExecReload = killall loop.sh && /home/john/bin/foo_main.sh
# Restart = on-abort
[Install]
WantedBy = multi-user.target
关于Linux服务意外死亡,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/46470071/