Using Symfony in Docker Environment for Production

Question

I am looking to implement a symfony application on Docker using Docker-Compose. I will have at least the following containers :

Nginx
Rabbitmq server
PHP-FPM
MySQL
Solr

Currently we have a development environment using the above setup too.

The Symfony application is stored locally (host) and then a volume is used on the PHP-FPM container so that it can read the application - this works well. We bash into the php-fpm container to run composer / app/console commands.

We also manually run the consumers (Symfony commands) that consume messages from the rabbitmq server.

What are my options in production ?

1) Can i create a single container running the application and then allow other containers to use it ? i see that the php-fpm container needs access to the application code - but i would also like to create a container to run a consumer - passing in the name of the service to run to the container - meaning i can have a single image that can be flexibly launched to process messages from any queue. What happens with logs / cache in this option ?

2) Have the application stored within each image that needs it ? this is my least favourite option as then to update the application i need to build each image

3) Something i haven't yet explored ?

I would like to allow easy updates to the application - something scripted perhaps, but i would also like to minimise downtime - i can do that using haproxy or something similar - has anyone else got any experiences with running a multi container symfony application in production ?

@Matteo how do you perform updates to the application ? script of some kind to rebuild all of the images ? and relaunch the containers ? — Manse
– Manse, Commented Mar 21, 2017 at 14:07
we use docker-cloud that with github hook rebuild the container — Matteo
– Matteo, Commented Mar 21, 2017 at 14:20

cernio · Accepted Answer · 2017-03-22 17:45:03Z

2

I run a container for each service. Remember that one of the Docker principles is "separation of concern".

You may have Nginx + PHP-FPM on the same container, though.

To launch all the services (in dev or prod environment) you can use docker-compose and the magic "SYMFONY_ENV=dev" environment variable to launch everything. I suggest to launch the consumers in a separate conainer, but with different project / log /cache paths, possibly. Consider that consumers, on production, may affect online performances if they are running with shared CPU/memory/disk.

I am currently investigating alternatives to deploy/postdeploy the webapp, the suboptimal solution is now a simple entrypoint bash script (which is passed to "docker run -d myimage php_entrypoint.sh" that:

prepares the environment
downloads and updates vendors
syncs resources to cdn, updates db schema, etc
runs the applications server (php-fpm in this case, i use supervisord to do the task)

It results in something like this:

#$OPTIMIZE is an ENV-propagated or a calulated variable

su -c "php composer.phar install $OPTIMIZE" webmgr

cp -f web/HTACCESS_${SYMFONY_ENV} web/.htaccess

/usr/bin/supervisord -c /etc/supervisord/supervisord.conf

The reason why I am using supervisord is that I have to copy/mount the [program:] sections that I need to run, thus maintaining a single php image that is good both for php-fpm and CLI/consumer work. I can also restart the php appserver without killing the container. Moreover, supervisord is quite clever at managing "daemonized" processes.

UPDATED

The webapp is mounted as a volume, and docker-compose.yml is in the project root directory, which contains docker image configurations and the symfony project. This is an excerpt of docker-compose.yml

webapp_fpm:
  image: ...  
  volumes:
    - ./symfony:/var/www/html
    - ./docker-conf/supervisord:/etc/supervisord
    - /var/log/appname/symfony:/var/log/symfony
  entrypoint: "/bin/bash php_entrypoint.sh"

edited Mar 22, 2017 at 17:45

answered Mar 21, 2017 at 19:20

cernio

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2 Comments

Manse Over a year ago

Where is the application stored ? in the image ? or cloned as part of the entrypoint ?

cernio Over a year ago

I edited the original answer to have everything in one place, hope it helps

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