d98a1b0dd7
This prctl(2) option can be used to set the "child subreaper" attribute of the calling process. This allows a process to take on the role of 'init', which means the process will inherit descendant processes when their immediate parent terminates. This will be used in an upcoming commit that uses a double fork(2) + unshare(2) to create a new PID namespace. The parent from the second fork will terminate leaving the child process to be inherited by 'init'. Aside from it being better to maintain the parent/child relationships between the various unit processes, without setting this you need to ^C twice to fully quit unit when running in the foreground after the double fork. Reviewed-by: Alejandro Colomar <alx@nginx.com> Signed-off-by: Andrew Clayton <a.clayton@nginx.com> |
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version |
NGINX Unit
Universal Web App Server
NGINX Unit is a lightweight and versatile open-source server that has three core capabilities:
- acts as an HTTP reverse proxy,
- serves static media assets,
- runs application code in seven languages.
Unit compresses several layers of the modern application stack into a potent, coherent solution with a focus on performance, low latency, and scalability. It is intended as a universal building block for any web architecture regardless of its complexity, from enterprise-scale deployments to your pet's homepage.
Its native RESTful JSON API enables dynamic updates with zero interruptions and flexible configuration, while its out-of-the-box productivity reliably scales to production-grade workloads. We achieve that with a complex, asynchronous, multithreading architecture comprising multiple processes to ensure security and robustness while getting the most out of today's computing platforms.
Quick Installation
macOS
$ brew install nginx/unit/unit
For details and available language packages, see the docs.
Docker
$ docker pull docker.io/nginx/unit
For a description of image tags, see the docs.
Amazon Linux, Fedora, RedHat
$ wget https://raw.githubusercontent.com/nginx/unit/master/tools/setup-unit && chmod +x setup-unit
# ./setup-unit repo-config && yum install unit
# ./setup-unit welcome
For details and available language packages, see the docs.
Debian, Ubuntu
$ wget https://raw.githubusercontent.com/nginx/unit/master/tools/setup-unit && chmod +x setup-unit
# ./setup-unit repo-config && apt install unit
# ./setup-unit welcome
For details and available language packages, see the docs.
Running a Hello World App
Suppose you saved a PHP script as /www/helloworld/index.php
:
<?php echo "Hello, PHP on Unit!"; ?>
To run it on Unit with the unit-php
module installed, first set up an
application object. Let's store our first config snippet in a file called
config.json
:
{
"helloworld": {
"type": "php",
"root": "/www/helloworld/"
}
}
Saving it as a file isn't necessary, but can come in handy with larger objects.
Now, PUT
it into the /config/applications
section of Unit's control API,
usually available by default via a Unix domain socket:
# curl -X PUT --data-binary @config.json --unix-socket \
/path/to/control.unit.sock http://localhost/config/applications
{
"success": "Reconfiguration done."
}
Next, reference the app from a listener object in the /config/listeners
section of the API. This time, we pass the config snippet straight from the
command line:
# curl -X PUT -d '{"127.0.0.1:8000": {"pass": "applications/helloworld"}}' \
--unix-socket /path/to/control.unit.sock http://localhost/config/listeners
{
"success": "Reconfiguration done."
}
Now Unit accepts requests at the specified IP and port, passing them to the application process. Your app works!
$ curl 127.0.0.1:8080
Hello, PHP on Unit!
Finally, query the entire /config
section of the control API:
# curl --unix-socket /path/to/control.unit.sock http://localhost/config/
Unit's output should contain both snippets, neatly organized:
{
"listeners": {
"127.0.0.1:8080": {
"pass": "applications/helloworld"
}
},
"applications": {
"helloworld": {
"type": "php",
"root": "/www/helloworld/"
}
}
}
For full details of configuration management, see the docs.
Community
-
The go-to place to start asking questions and share your thoughts is our Slack channel.
-
Our GitHub issues page offers space for a more technical discussion at your own pace.
-
The project map on GitHub sheds some light on our current work and plans for the future.
-
Our official website may provide answers not easily found otherwise.
-
Get involved with the project by contributing! See the contributing guide for details.
-
To reach the team directly, subscribe to the mailing list.
-
For security issues, email us, mentioning NGINX Unit in the subject and following the CVSS v3.1 spec.