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arm32v5/nginx

By arm32v5

Updated 7 days ago

Official build of Nginx.

Image
Web Servers
0

50K+

Note: this is the "per-architecture" repository for the arm32v5 builds of the nginx official image -- for more information, see "Architectures other than amd64?" in the official images documentation and "An image's source changed in Git, now what?" in the official images FAQ.

Quick reference

Supported tags and respective Dockerfile links

arm32v5/nginx build status badge

Quick reference (cont.)

What is nginx?

Nginx (pronounced "engine-x") is an open source reverse proxy server for HTTP, HTTPS, SMTP, POP3, and IMAP protocols, as well as a load balancer, HTTP cache, and a web server (origin server). The nginx project started with a strong focus on high concurrency, high performance and low memory usage. It is licensed under the 2-clause BSD-like license and it runs on Linux, BSD variants, Mac OS X, Solaris, AIX, HP-UX, as well as on other *nix flavors. It also has a proof of concept port for Microsoft Windows.

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How to use this image

Hosting some simple static content

$ docker run --name some-nginx -v /some/content:/usr/share/nginx/html:ro -d arm32v5/nginx

Alternatively, a simple Dockerfile can be used to generate a new image that includes the necessary content (which is a much cleaner solution than the bind mount above):

FROM arm32v5/nginx
COPY static-html-directory /usr/share/nginx/html

Place this file in the same directory as your directory of content ("static-html-directory"), then run these commands to build and start your container:

$ docker build -t some-content-nginx .
$ docker run --name some-nginx -d some-content-nginx

Exposing external port

$ docker run --name some-nginx -d -p 8080:80 some-content-nginx

Then you can hit http://localhost:8080 or http://host-ip:8080 in your browser.

Customize configuration

You can mount your configuration file, or build a new image with it.

If you wish to adapt the default configuration, use something like the following to get it from a running nginx container:

$ docker run --rm --entrypoint=cat arm32v5/nginx /etc/nginx/nginx.conf > /host/path/nginx.conf

And then edit /host/path/nginx.conf in your host file system.

For information on the syntax of the nginx configuration files, see the official documentation (specifically the Beginner's Guide).

Mount your configuration file
$ docker run --name my-custom-nginx-container -v /host/path/nginx.conf:/etc/nginx/nginx.conf:ro -d arm32v5/nginx
Build a new image with your configuration file
FROM arm32v5/nginx
COPY nginx.conf /etc/nginx/nginx.conf

If you add a custom CMD in the Dockerfile, be sure to include -g daemon off; in the CMD in order for nginx to stay in the foreground, so that Docker can track the process properly (otherwise your container will stop immediately after starting)!

Then build the image with docker build -t custom-nginx . and run it as follows:

$ docker run --name my-custom-nginx-container -d custom-nginx
Using environment variables in arm32v5/nginx configuration (new in 1.19)

Out-of-the-box, arm32v5/nginx doesn't support environment variables inside most configuration blocks. But this image has a function, which will extract environment variables before arm32v5/nginx starts.

Here is an example using docker-compose.yml:

web:
  image: arm32v5/nginx
  volumes:
   - ./templates:/etc/nginx/templates
  ports:
   - "8080:80"
  environment:
   - NGINX_HOST=foobar.com
   - NGINX_PORT=80

By default, this function reads template files in /etc/nginx/templates/*.template and outputs the result of executing envsubst to /etc/nginx/conf.d.

So if you place templates/default.conf.template file, which contains variable references like this:

listen       ${NGINX_PORT};

outputs to /etc/nginx/conf.d/default.conf like this:

listen       80;

This behavior can be changed via the following environment variables:

  • NGINX_ENVSUBST_TEMPLATE_DIR
    • A directory which contains template files (default: /etc/nginx/templates)
    • When this directory doesn't exist, this function will do nothing about template processing.
  • NGINX_ENVSUBST_TEMPLATE_SUFFIX
    • A suffix of template files (default: .template)
    • This function only processes the files whose name ends with this suffix.
  • NGINX_ENVSUBST_OUTPUT_DIR
    • A directory where the result of executing envsubst is output (default: /etc/nginx/conf.d)
    • The output filename is the template filename with the suffix removed.
      • ex.) /etc/nginx/templates/default.conf.template will be output with the filename /etc/nginx/conf.d/default.conf.
    • This directory must be writable by the user running a container.

Running arm32v5/nginx in read-only mode

To run arm32v5/nginx in read-only mode, you will need to mount a Docker volume to every location where arm32v5/nginx writes information. The default arm32v5/nginx configuration requires write access to /var/cache/nginx and /var/run. This can be easily accomplished by running arm32v5/nginx as follows:

$ docker run -d -p 80:80 --read-only -v $(pwd)/nginx-cache:/var/cache/nginx -v $(pwd)/nginx-pid:/var/run nginx

If you have a more advanced configuration that requires arm32v5/nginx to write to other locations, simply add more volume mounts to those locations.

Running nginx in debug mode

Images since version 1.9.8 come with nginx-debug binary that produces verbose output when using higher log levels. It can be used with simple CMD substitution:

$ docker run --name my-nginx -v /host/path/nginx.conf:/etc/nginx/nginx.conf:ro -d arm32v5/nginx nginx-debug -g 'daemon off;'

Similar configuration in docker-compose.yml may look like this:

web:
  image: arm32v5/nginx
  volumes:
    - ./nginx.conf:/etc/nginx/nginx.conf:ro
  command: [nginx-debug, '-g', 'daemon off;']

Entrypoint quiet logs

Since version 1.19.0, a verbose entrypoint was added. It provides information on what's happening during container startup. You can silence this output by setting environment variable NGINX_ENTRYPOINT_QUIET_LOGS:

$ docker run -d -e NGINX_ENTRYPOINT_QUIET_LOGS=1 arm32v5/nginx

User and group id

Since 1.17.0, both alpine- and debian-based images variants use the same user and group ids to drop the privileges for worker processes:

$ id
uid=101(nginx) gid=101(nginx) groups=101(nginx)

Running arm32v5/nginx as a non-root user

It is possible to run the image as a less privileged arbitrary UID/GID. This, however, requires modification of arm32v5/nginx configuration to use directories writeable by that specific UID/GID pair:

$ docker run -d -v $PWD/nginx.conf:/etc/nginx/nginx.conf arm32v5/nginx

where nginx.conf in the current directory should have the following directives re-defined:

pid        /tmp/nginx.pid;

And in the http context:

http {
    client_body_temp_path /tmp/client_temp;
    proxy_temp_path       /tmp/proxy_temp_path;
    fastcgi_temp_path     /tmp/fastcgi_temp;
    uwsgi_temp_path       /tmp/uwsgi_temp;
    scgi_temp_path        /tmp/scgi_temp;
...
}

Alternatively, check out the official Docker NGINX unprivileged image.

Image Variants

The arm32v5/nginx images come in many flavors, each designed for a specific use case.

arm32v5/nginx:<version>

This is the defacto image. If you are unsure about what your needs are, you probably want to use this one. It is designed to be used both as a throw away container (mount your source code and start the container to start your app), as well as the base to build other images off of.

Some of these tags may have names like bookworm in them. These are the suite code names for releases of Debian and indicate which release the image is based on. If your image needs to install any additional packages beyond what comes with the image, you'll likely want to specify one of these explicitly to minimize breakage when there are new releases of Debian.

arm32v5/nginx:<version>-perl / arm32v5/nginx:<version>-alpine-perl

Starting with arm32v5/nginx:1.13.0 / mainline and arm32v5/nginx:1.12.0 / stable, the perl module has been removed from the default images. A separate -perl tag variant is available if you wish to use the perl module.

License

View license information for the software contained in this image.

As with all Docker images, these likely also contain other software which may be under other licenses (such as Bash, etc from the base distribution, along with any direct or indirect dependencies of the primary software being contained).

Some additional license information which was able to be auto-detected might be found in the repo-info repository's nginx/ directory.

As for any pre-built image usage, it is the image user's responsibility to ensure that any use of this image complies with any relevant licenses for all software contained within.

Docker Pull Command

docker pull arm32v5/nginx