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by simonlebo
4390 days ago
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Great article.
My understanding of Docker is quite new, so take my remarks with a grain of salt. One thing I would emphasise in the first paragraph is that you need at least other provisioning/configuration tools to set up the servers where the docker containers will be deployed to. I know it would obvious to most, but you would still need to start/stop these machines with correct docker install, firewalls rules, and probably more. The VM layer has been flushed out, but still exists and needs attention. After spending more than a week looking into Docker, my one frustration with Docker is that I have not found a way to correctly develop with it. Most of the docs I see are about deploying established apps, but I would love to see tutorials about how to develop, and start from scratch with it. Does Docker stand in your way when developing or does it make it easier? Maybe a solution is to create docker wrappers for our favourite framework that would abstract Docker. Anyways, I'd love to see more on this. |
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Personally, I use aliases for almost all of its commands. I have also created various scripts for automating things like configuring the SSH connection to the container, etc.
Another thing you have to figure out is how to edit the code. My choice was to use a volume (only in dev), and download the code into a different directory inside the container. Then on the first run, an init script inside the container will clean the volume and move the code.
It has been some painful months and I haven't even finished. I'm liking where I'm going and I'm almost there, but if I had known the work it would take I think I would have avoided it. But if you are a team it's definitely worth it. Devs can now install anything they want without asking the Ops people for permission (as you can imagine by this statement, I'm more a dev/devops than an ops guy).
Oh one thing that does make it awesome though is its combination with Jenkins, if you are into continuous delivery. With those two, you can easily test all kinds of environments in the same machine without wasting resources, and thanks to Docker's cache it doesn't have to reinstall everything every time, it's really fast.