![]() ![]() For this post we selected the Gitlab Community Edition Docker image, which is based on the Omnibus package.īefore running the container we need to create the host volumes and set up the default configuration files that we’ll need in the first execution. It’s always best to choose an official image as those are well structured and tend to be more up to date. Creating the initial stateĪssuming that you already installed Docker in your server, the first step is selecting a Docker image that suits our needs. This way, your state will be safe across multiple executions of the container. ![]() The static parts should live inside the docker container and the state should be moved out to host volume folders that you can mount into your containers. To persist data you need to separate the state (configuration files you want to be able to edit frequently, databases, logs, etc) from the rest (system and static application files). If you restart a container, you’ll restart all the processes running inside it and all changes made in previous executions will be lost because the container is created from the same original image. ![]() This has obvious benefits in terms of security, but an equally important benefit is making the management of your CI infrastructure much more enjoyable and less painful.ĭocker containers are not persistent because they are based on images that are immutable. Linux Containers provide resource limitation and prioritization (CPU, memory, block I/O, network) and application isolation in terms of the execution environment (filesystem, process trees, networking, user IDs). Docker is basically a Linux Container management toolset. If you have been around in the last couple of years you probably already heard of Docker. In this article we are going to show you step by step how can you migrate your current Gitlab infrastructure into Docker. However, when using Docker those troubles basically go away. Unfortunately, that sometimes means that you might think twice before deciding to upgrade your Gitlab configuration, or before upgrading your CI server. If you did that already, you know how sensitive your build environment is and you should do everything you can to make it healthy and stable. To see how quickly you can annoy your developers you just need to bring your Gitlab down. ![]()
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