如何在挂载/ vagrant之后运行nginx.service

Question

我想做的事？

我正在尝试/vagrant通过vagrant自动安装nginx加载配置.

所以我编辑了nginx.service,使它在挂载共享文件夹后启动,但它不起作用.

当然nginx已经在virtualbox-guest-utils.service之后启动了,但是,它似乎是在vagrant.mount(/ vagrant)之前启动的.因为nginx无法从/ vagrant加载配置,并且在systemctl restart nginx.service手动运行命令后它可以正常工作.

自动生成.mount单元启动后如何运行.service单元？

环境

• 流浪者1.8.1
• Ubuntu Server 15.10(ubuntu/wily64)
• VirtualBox 5.0.14

systemctl cat nginx.service

模式1:不起作用

# /lib/systemd/system/nginx.service
# Stop dance for nginx
# =======================
#
# ExecStop sends SIGSTOP (graceful stop) to the nginx process.
# If, after 5s (--retry QUIT/5) nginx is still running, systemd takes control
# and sends SIGTERM (fast shutdown) to the main process.
# After another 5s (TimeoutStopSec=5), and if nginx is alive, systemd sends
# SIGKILL to all the remaining processes in the process group (KillMode=mixed).
#
# nginx signals reference doc:
# http://nginx.org/en/docs/control.html
#
[Unit]
Description=A high performance web server and a reverse proxy server
After=network.target

[Service]
Type=forking
PIDFile=/run/nginx.pid
ExecStartPre=/usr/sbin/nginx -t -q -g 'daemon on; master_process on;'
ExecStart=/usr/sbin/nginx -g 'daemon on; master_process on;'
ExecReload=/usr/sbin/nginx -g 'daemon on; master_process on;' -s reload
ExecStop=-/sbin/start-stop-daemon --quiet --stop --retry QUIT/5 --pidfile /run/nginx.pid
TimeoutStopSec=5
KillMode=mixed

[Install]
WantedBy=multi-user.target

# /etc/systemd/system/nginx.service.d/override.conf
[Unit]
Requires=virtualbox-guest-utils.service vagrant.mount
After=virtualbox-guest-utils.service vagrant.mount

模式2:不起作用

# /lib/systemd/system/nginx.service
# Stop dance for nginx
# =======================
#
# ExecStop sends SIGSTOP (graceful stop) to the nginx process.
# If, after 5s (--retry QUIT/5) nginx is still running, systemd takes control
# and sends SIGTERM (fast shutdown) to the main process.
# After another 5s (TimeoutStopSec=5), and if nginx is alive, systemd sends
# SIGKILL to all the remaining processes in the process group (KillMode=mixed).
#
# nginx signals reference doc:
# http://nginx.org/en/docs/control.html
#
[Unit]
Description=A high performance web server and a reverse proxy server
After=network.target

[Service]
Type=forking
PIDFile=/run/nginx.pid
ExecStartPre=/usr/sbin/nginx -t -q -g 'daemon on; master_process on;'
ExecStart=/usr/sbin/nginx -g 'daemon on; master_process on;'
ExecReload=/usr/sbin/nginx -g 'daemon on; master_process on;' -s reload
ExecStop=-/sbin/start-stop-daemon --quiet --stop --retry QUIT/5 --pidfile /run/nginx.pid
TimeoutStopSec=5
KillMode=mixed

[Install]
WantedBy=multi-user.target

# /etc/systemd/system/nginx.service.d/override.conf
[Unit]
RequiresMountsFor=/vagrant

Answer 1

使用mount.target单元似乎有效。

流浪文件：

# -*- mode: ruby -*-
# vi: set ft=ruby :

Vagrant.configure("2") do |config|
  config.vm.box = "ubuntu/wily64"
  config.vm.provision :shell, path: "bootstrap.sh"

  # Disabling mounting of the /vagrant directory to make sure ngnix is blocked
  # Comment this out to allow the shared folder
  config.vm.synced_folder ".", "/vagrant", disabled: true
end

引导程序.sh：

#!/usr/bin/env bash

apt-get update
apt-get install -y nginx

# Make vagrant.mount loosely dependent on nginx.service
sed -i 's/WantedBy=multi-user.target/WantedBy=vagrant.mount/' /lib/systemd/system/nginx.service
systemctl daemon-reload

# Update service symlinks
systemctl disable nginx.service
systemctl enable nginx.service

通过运行vagrant reload使 VM 在没有挂载 /vagrant 目录的情况下启动来测试这一点。登录虚拟机并查看 nginx 没有运行：

vagrant@vagrant-ubuntu-wily-64:~$ sudo systemctl status nginx.service 
? nginx.service - A high performance web server and a reverse proxy server
   Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
   Active: inactive (dead)

然后vagrant reload再次注释掉禁用共享文件夹的 Vagrantfile 行。再次登录虚拟机，看到 nginx 正在运行：

vagrant@vagrant-ubuntu-wily-64:~$ systemctl status nginx.service 
? nginx.service - A high performance web server and a reverse proxy server
  Loaded: loaded (/lib/systemd/system/nginx.service; enabled; vendor preset: enabled)
  Active: active (running) since Mon 2016-07-25 04:28:00 UTC; 42s ago
 Process: 1152 ExecStart=/usr/sbin/nginx -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
 Process: 1146 ExecStartPre=/usr/sbin/nginx -t -q -g daemon on; master_process on; (code=exited, status=0/SUCCESS)
Main PID: 1156 (nginx)
  Memory: 7.4M
     CPU: 17ms
  CGroup: /system.slice/nginx.service
          ??1156 nginx: master process /usr/sbin/nginx -g daemon on; master_process on;
      ??1157 nginx: worker process

Answer 2

我写了一篇文章如何使用udev事件重新启动 nginx 和 php5-fpm。

简而言之，我添加/etc/udev/rules.d/50-vagrant-mount.rules了规则：

SUBSYSTEM=="bdi",ACTION=="add",RUN+="/bin/bash /root/.udev-mount-restart-services.sh"

脚本/root/.udev-mount-restart-services.sh是：

sleep 5 # wait for a bit for NFS to make sure resources are available
systemctl restart php5-fpm > /dev/null 2>&1
systemctl restart nginx > /dev/null 2>&1