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Merge pull request #1260 from alessfg/(feature)/update-nginx-docs 

Add instructions to run nginx in read-only mode
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Tianon Gravi 2018-06-27 10:14:06 -07:00 committed by GitHub
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@ -90,6 +90,16 @@ The `mysite.template` file may then contain variable references like this:
`listen ${NGINX_PORT};
`
## Running %%IMAGE%% in read-only mode
To run %%IMAGE%% in read-only mode, you will need to mount a Docker volume to every location where %%IMAGE%% writes information. The default %%IMAGE%% configuration requires write access to `/var/cache` and `/var/run`. This can be easily accomplished by running %%IMAGE%% as follows:
```console
$ 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 %%IMAGE%% 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: