mirror of
https://github.com/systemd/systemd
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8e3fee33af
This reverts commit 5e8ff010a1.
This broke all the URLs, we can't have that. (And actually, we probably don't
_want_ to make the change either. It's nicer to have all the pages in one
directory, so one doesn't have to figure out to which collection the page
belongs.)
123 lines
2.8 KiB
Markdown
123 lines
2.8 KiB
Markdown
---
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title: Socket Activation with Popular Daemons
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category: Manuals and Documentation for Users and Administrators
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layout: default
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SPDX-License-Identifier: LGPL-2.1-or-later
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---
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## nginx
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nginx includes an undocumented, internal socket-passing mechanism based on the `NGINX` environmental variable. It uses this to perform reloads without having to close and reopen its sockets, but it's also useful for socket activation.
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**/etc/nginx/my-nginx.conf**
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```
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http {
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server {
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listen [::]:80 ipv6only=on;
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listen 80;
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}
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}
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```
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**/etc/systemd/system/my-nginx.service**
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```
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[Service]
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User=nginx
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Group=nginx
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Environment=NGINX=3:4;
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ExecStart=/usr/sbin/nginx -c/etc/nginx/my-nginx.conf
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PrivateNetwork=true
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```
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**/etc/systemd/system/my-nginx.socket**
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```
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[Socket]
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ListenStream=80
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ListenStream=0.0.0.0:80
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BindIPv6Only=ipv6-only
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After=network.target
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Requires=network.target
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[Install]
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WantedBy=sockets.target
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```
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## PHP-FPM
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Like nginx, PHP-FPM includes a socket-passing mechanism an environmental variable. In PHP-FPM's case, it's `FPM_SOCKETS`.
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This configuration is possible with any web server that supports FastCGI (like Apache, Lighttpd, or nginx). The web server does not need to know anything special about the socket; use a normal PHP-FPM configuration.
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Paths are based on a Fedora 19 system.
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### First, the configuration files
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**/etc/php-fpm.d/my-php-fpm-pool.conf**
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```
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[global]
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pid = /run/my-php-fpm-pool.pid ; Not really used by anything with daemonize = no, but needs to be writable.
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error_log = syslog ; Will aggregate to the service's systemd journal.
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daemonize = no ; systemd handles the forking.
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[www]
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listen = /var/run/my-php-fpm-pool.socket ; Must match systemd socket unit.
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user = nginx ; Ignored but required.
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group = nginx ; Ignored but required.
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pm = static
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pm.max_children = 10
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slowlog = syslog
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```
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**/etc/systemd/system/my-php-fpm-pool.service**
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```
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[Service]
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User=nginx
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Group=nginx
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Environment="FPM_SOCKETS=/var/run/my-php-fpm-pool.socket=3"
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ExecStart=/usr/sbin/php-fpm --fpm-config=/etc/php-fpm.d/my-php-fpm-pool.conf
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KillMode=process
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```
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**/etc/systemd/system/my-php-fpm-pool.socket**
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```
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[Socket]
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ListenStream=/var/run/my-php-fpm-pool.socket
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[Install]
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WantedBy=sockets.target
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```
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### Second, the setup commands
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```sh
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sudo systemctl --system daemon-reload
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sudo systemctl start my-php-fpm-pool.socket
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sudo systemctl enable my-php-fpm-pool.socket
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```
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After accessing the web server, the service should be running.
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```sh
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sudo systemctl status my-php-fpm-pool.service
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```
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It's possible to shut down the service and re-activate it using the web browser, too. It's necessary to stop and start the socket to reset some shutdown PHP-FPM does that otherwise breaks reactivation.
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```sh
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sudo systemctl stop my-php-fpm-pool.socket my-php-fpm-pool.service
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sudo systemctl start my-php-fpm-pool.socket
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```
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