Isolate PHP applications with Docker

Question

I am trying to setup set of docker containers to serve couple of applications. One of my goals is to isolate PHP applications from eachother.

I am new to Docker and not fully understand its concepts. So only idea i came up with is to create a dedicated php-fpm container per-application.

I started with official image: php:7.0-fpm but now I think that I may need to create my own general purpose pfp-fpm container (based on mentioned above), add some programs to it (such as ImageMagick) and instantiate couple of such php-fpm+stuff containers per PHP-application, setting up volume pointing strictly to that application source code.

Am I thinking in right direction?

VonC · Accepted Answer · 2016-07-10 07:03:38Z

3

now I think that I may need to create my own general purpose pfp-fpm container (based on mentioned above), add some programs to it

That is the idea: you can make a Dockerfile starting with FROM php:7.0-fpm, with your common programs installed in it.

Then you can make a multiple other Dockerfiles (each in their different folder), starting with FROM <yourFirstImage>, and declaring specifics to each php applications.

answered Jul 10, 2016 at 7:03

VonC

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4 Comments

SmxCde Over a year ago

In this case - requirements for all the apps are similar, this is not the point (but I got what you are saying, thank you!). Main question was - Do I really need to keep a container with FPM per-application I want to isolate?

SmxCde Over a year ago

And if it is so - how resource consuming is that? How can I measure how much ram or CPU I will spend on each PHP-FPM container instance?

VonC Over a year ago

@SmxCde "Do I really need to keep a container with FPM-per application I want to isolate?": yes, if you want to avoid any side-effect between each apps, as each one will run in its own machine (ows disk space and memory)

VonC Over a year ago

@SmxCde "how resource consuming is that?": it depends on their activity: as long as those apps are not doing much, it won't consume much if any CPU or even disk space, due to the copy-on-write mechanism.

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