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https://github.com/paketo-buildpacks/nginx


https://github.com/paketo-buildpacks/nginx

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# NGINX Server Cloud Native Buildpack



The NGINX buildpack provides the [NGINX](https://www.nginx.com/) binary distribution.

The buildpack installs the NGINX binary distribution onto the `$PATH` which

makes it available for subsequent buildpacks and/or the application image.



#### The NGINX buildpack is compatible with the following builder(s):

- [Paketo Full Builder](https://github.com/paketo-buildpacks/full-builder)

- [Paketo Base Builder](https://github.com/paketo-buildpacks/base-builder)



## Integration



The NGINX CNB provides nginx as a dependency. Downstream buildpacks, like

[PHP Web CNB](https://github.com/paketo-buildpacks/php-web) can require the nginx

dependency by generating a [Build Plan

TOML](https://github.com/buildpacks/spec/blob/master/buildpack.md#build-plan-toml)

file that looks like the following:



```toml

[[requires]]



  # The name of the NGINX dependency is "nginx". This value is considered

  # part of the public API for the buildpack and will not change without a plan

  # for deprecation.

  name = "nginx"



  # The version of the NGINX dependency is not required. In the case it

  # is not specified, the buildpack will provide the default version, which can

  # be seen in the buildpack.toml file.

  # If you wish to request a specific version, the buildpack supports

  # specifying a semver constraint in the form of "1.*", "1.17.*", or even

  # "1.17.9".

  version = "1.17.9"



  # The NGINX buildpack supports some non-required metadata options.

  [requires.metadata]



    # Setting the launch flag to true will ensure that the NGINX

    # dependency is available on the $PATH for the running application. If you are

    # writing an application that needs to run NGINX at runtime, this flag should

    # be set to true.

    launch = true

```



## Usage



To package this buildpack for consumption:



```

$ ./scripts/package.sh

```



## Data driven templates



The NGINX buildpack supports data driven templates for nginx config. You can

use templated variables like `{{port}}`, `{{env "FOO"}}` and `{{module

"ngx_stream_module"}}` in your `nginx.conf` to use values known at launch time.



A usage example can be found in the [`samples` repository under the `nginx`

directory](https://github.com/paketo-buildpacks/samples/tree/main/web-servers/nginx-sample).



#### PORT



Use `{{port}}` to dynamically set the port at which the server will accepts requests. At launch time, the buildpack will read the value of `$PORT` to set the value of `{{port}}`.



For example, to set an NGINX server to listen on `$PORT`, use the following in your `nginx.conf` file:



```

server {

  listen {{port}};

}

```



Then run the built image using the `PORT` variable set as follows:



```

docker run --tty --env PORT=8080 --publish 8080:8080 my-nginx-image

```



#### Environment Variables



This is a generic case of the `{{port}}` directive described ealier. To use the

value of any environment variable `$FOOVAR` available at launch time, use the

directive `{{env "FOOVAR"}}` in your `nginx.conf`.



For example, include the following in your `nginx.conf` file to enable or

disable gzipping of responses based on the value of `GZIP_DOWNLOADS`:



```

gzip {{env "GZIP_DOWNLOADS"}};

```



Then run the built image using the `GZIP_DOWNLOADS` variable set as follows:



```

docker run --tty --env PORT=8080 --env GZIP_DOWNLOADS=off --publish 8080:8080 my-nginx-image

```



#### Loading dynamic modules



You can use templates to set the path to a dynamic module using the

`load_module` directive.



* To load a user-provided module named `ngx_foo_module`, provide a

  `modules/ngx_foo_module.so` file in your app directory and add the following

  to the top of your `nginx.conf` file:



```

{{module "ngx_foo_module"}}

```



* To load a buildpack-provided module like `ngx_stream_module`, add the

  following to the top of your `nginx.conf` file. You do not need to provide an

  `ngx_stream_module.so` file:



```

{{module "ngx_stream_module"}}

```



## Configurations



Specifying the NGINX Server version through `buildpack.yml` configuration

is deprecated and will not be supported in NGINX Server Buildpack v1.0.0.



To migrate from using `buildpack.yml` please set the following environment

variables at build time either directly (ex. `pack build my-app --env

BP_ENVIRONMENT_VARIABLE=some-value`) or through a [`project.toml`

file](https://github.com/buildpacks/spec/blob/main/extensions/project-descriptor.md)



### `BP_NGINX_VERSION`

The `BP_NGINX_VERSION` variable allows you to specify the version of NGINX Server that is installed.



```shell

BP_NGINX_VERSION=1.21.0

```



This will replace the following structure in `buildpack.yml`:

```yaml

nginx:

  # this allows you to specify a version constraint for the nginx dependency

  # any valid semver constraints (e.g. 1.* and 1.21.*) are also acceptable

  version: "1.21.0"

```

### `BP_WEB_SERVER_ENABLE_PUSH_STATE`

The `BP_WEB_SERVER_ENABLE_PUSH_STATE` variable enables push state based routing for Single-page applications relying on browser history API.

NGINX Server will send the content at / in response to *any* requested endpoint.

Usefull for React, Angular, Vue and other SPAs.



### `BP_NGINX_STUB_STATUS_PORT`

The `BP_NGINX_STUB_STATUS_PORT` variable exposes a handful of NGINX Server metrics via the [`stub_status`](https://nginx.org/en/docs/http/ngx_http_stub_status_module.html#stub_status) module which provides basic status information on provided port.

This comes handy for monitoring the server. For example using [NGINX Prometheus Exporter](https://github.com/nginxinc/nginx-prometheus-exporter)