我有一个名为update.sh的脚本来更新服务器。
问题是;当我停止PM2进程时，它会在那里结束bash进程（？）。
我无法弄清楚如何从没有链接到父级的父级生成一个进程。 ：-S
update.sh
#!/bin/bash
# Check we are not already updating.
if [ -f update.lock ]; then
echo "Already updating. Locked."
exit
fi
# Make the log file.
rm update.log
touch update.log
# Create update lock.
touch update.lock
echo "Cleaning up" | tee update.log
rm -rf the-last-word
rm -rf Server
echo "Retrieving files from BitBucket" | tee update.log
git clone git@bitbucket.org:dotdot/dot-project.git
# Remove all directories except Server (So we don't have game source code on the Server)
echo "Removing game source code" | tee update.log
cd the-last-word
# Move the Server directory one up.
mv Server ../
cd ../
rm -rf the-last-word
# Stop the previous server.
# == PM2 stop some server name.
echo "Stopping server & removing" | tee update.log
pm2 delete "Some App" | tee update.log
# Update the current & run.
echo "Installing node modules" | tee update.log
cd Server
npm install | tee update.log
# Start the server again
# == PM2 start some server name.
echo "Starting node server" | tee update.log
NODE_ENV=production pm2 start bin/www.js --name "Some App" | tee update.log
# Remove lock file.
cd ..
rm update.lock
现在我使用node（快速路由）运行此脚本。
admin.js
// Update server
app.use("/admin/update", authMiddleware, function(req, res, next) {
console.log('Updating server from script.');
const { spawn } = require('child_process');
const deploySh = spawn('sh', [ 'update.sh' ], {
cwd: '/www/thelastword/',
env: Object.assign({}, process.env, { PATH: process.env.PATH + ':/usr/local/bin' })
});
res.status(200).json('Updating Server');
});
答案 0 :(得分：1)
如果admin.js是服务器进程的一部分，请尝试nohup
const deploySh = spawn('sh', [ 'nohup ./update.sh' ], {
cwd: '/www/thelastword/',
env: Object.assign({}, process.env, { PATH: process.env.PATH + ':/usr/local/bin' })
});
nohup允许子进程运行，即使父进程被终止。
引自https://unix.stackexchange.com/questions/137759/why-use-nohup-rather-than-exec：
nohup在忽略SIGHUP信号的情况下运行特定程序。当终端关闭时，内核将SIGHUP发送到该终端（即shell）中的控制进程。 shell又将SIGHUP发送给后台运行的所有作业。使用nohup运行作业可以防止在终端死机时以这种方式被杀死（例如，如果您远程登录并且连接断开，或者您关闭了终端仿真器）。
参考：
我做了一个简单的测试，bash没有在pm2 delete之后退出。
<强>伪server.js
var pid = require('process').pid;
var server = require('net').createServer().listen();
<强> test.sh
echo "start dummy."
pm2 start ./dummy-server.js --name 'Dummy'
echo "stop dummy."
pm2 delete 'Dummy'
echo "Sleep 5sec"
sleep 5
echo "Done."
<强>输出：
start dummy.
[PM2] Starting ./dummy-server.js in fork_mode (1 instance)
[PM2] Done.
┌──────────┬────┬──────┬──────┬────────┬─────────┬────────┬─────────────┬──────────┐
│ App name │ id │ mode │ pid │ status │ restart │ uptime │ memory │ watching │
├──────────┼────┼──────┼──────┼────────┼─────────┼────────┼─────────────┼──────────┤
│ Dummy │ 0 │ fork │ 9328 │ online │ 0 │ 0s │ 15.219 MB │ disabled │
└──────────┴────┴──────┴──────┴────────┴─────────┴────────┴─────────────┴──────────┘
Use `pm2 show <id|name>` to get more details about an app
stop dummy.
[PM2] Applying action deleteProcessId on app [Dummy](ids: 0)
[PM2] [Dummy](0) ✓
┌──────────┬────┬──────┬─────┬────────┬─────────┬────────┬────────┬──────────┐
│ App name │ id │ mode │ pid │ status │ restart │ uptime │ memory │ watching │
└──────────┴────┴──────┴─────┴────────┴─────────┴────────┴────────┴──────────┘
Use `pm2 show <id|name>` to get more details about an app
Sleep 5sec
Done.
update.sh在停止之前删除/更改服务器目录。有时，这可能会产生意外/奇怪的行为。
我修改了update.sh如下：
#!/bin/bash
# Check we are not already updating.
if [ -f update.lock ]; then
echo "Already updating. Locked."
exit
fi
# Make the log file.
rm update.log
touch update.log
# Create update lock.
touch update.lock
# --- Stop server before deleting its directory!
# Stop the previous server.
# == PM2 stop some server name.
echo "Stopping server & removing" | tee update.log
pm2 delete "Some App" | tee update.log
echo "Cleaning up" | tee update.log
rm -rf the-last-word
rm -rf Server
echo "Retrieving files from BitBucket" | tee update.log
git clone git@bitbucket.org:dotdot/dot-project.git
# Remove all directories except Server (So we don't have game source code on the Server)
echo "Removing game source code" | tee update.log
cd the-last-word
# Move the Server directory one up.
mv Server ../
cd ../
rm -rf the-last-word
# Update the current & run.
echo "Installing node modules" | tee update.log
cd Server
npm install | tee update.log
# Start the server again
# == PM2 start some server name.
echo "Starting node server" | tee update.log
NODE_ENV=production pm2 start bin/www.js --name "Some App" | tee update.log
# Remove lock file.
cd ..
rm update.lock