Last week I was tasked with increasing the size of some Persistent Volumes (PV) for one of the apps running on You need to mount the host's docker socket: (NOTE: This is from one of my old gitlab installations, I haven't tested this against the latest release), Here's my full Runner block. You signed in with another tab or window. In the case of werf, these instructions include werf build, werf converge, and werf cleanup. Facile.it relies on a big and keen crew of developers. 3) Optional: You run separate docker deployments and make them accessible via service. This renders scaling easier by moving workloads from GitLab Runners to Kubernetes while allowing other K8s cluster resources to be used. The solution was to configure a custom GitLab Runner with four If your pod has started, then lets check the logs for logging. The combination of the alias: docker setting and the DOCKER_HOST environment variable points our job to the D-in-D daemon socket; the --registry-mirror option let the daemon use our internal registry mirror to speed up pulling official images; last but not least, the DOCKER_DRIVER uses the overlay2 filesystem for the Docker build, which is faster and less space consuming (I suggest you to use that on your local Linux machines too!). In this specific case were talking about a PHP/Symfony application and, starting from some advice that I got from my colleague Thomas, I wrote down this Dockerfile: The base image that I extend contains everything that doesnt change often: PHP version, extensions, a non-root user. The GIT_DEPTH option makes the project clone process in each job a bit faster, pulling only the current commit, not the whole Git history. By default - when you using official charts.gitlab.io chart for gitlab-runner in k8s, you have some changes in build process, in comparsion with good old hosted docker runners. To begin with, you can use an existing project or create a new one. The image option allows you to require a different base image in which to execute each job of the pipeline. I do that in the GitLab CI configuration so I can define them only once and use them everywhere: I still leverage GitLabs $CI_REGISTRY variable to compose the names, so basically my image names will be: Just remember to use $CI_COMMIT_REF_SLUG for the second tag, because it has slashes and other invalid chars stripped out automatically. To overcome those issues, Ive tinkered a lot to obtain a clear and easy way to delete my CI image after the build. Disclaimer The If you dont have access to one, install MicroK8s on your laptop at no cost. kubernetes. First, get a terminal inside of the newly cloned directory. Mine looks as below: Now you can use your newly uploaded container image to create a deployment : Initially, Kubernetes will fail to pull the image, and you should see something like this: This is because theres no secret. To create your container registry on GitLab you will need to complete the following steps: These steps will create a private registry, but you can use them as a guide for a public registry alsojust skip the deployment token steps. PowerShell modules. late than never! application. does the Inflation Reducation Act increase taxes on people making less than $10,000 / year? Why would space traders pick up and offload their goods from an orbiting platform rather than direct to the planet? Passionate pseudo-geek, Automation lover, and DevOps advocate - falling down the Hype-Pipe, every day. In order to render the build environment predictable and reproducible, you have to run builds in separate, isolated containers or single-use virtual machines. Its just a matter of adding a few new jobs to the pipeline, and some stages too (new one in bold): The new build prod stage will contain job(s) to build the container that will be shipped in production. But thats fine because by now our process setups is already (semi) automatic. Facile.it Engineering gitlab, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Yes, I have tried this also but dind container is getting error time="2022-01-18T22:14:03.338172340Z" level=info msg="Starting up" time="2022-01-18T22:14:03.341282369Z" level=warning msg="could not change group /var/run/docker.sock to docker: group docker not failed to load listeners: can't create unix socket /var/run/docker.sock: is a directory, I've added my own runner config block. If possible, this task was to be completed without any downtime to the Its also very important to use version: '3.2', because its needed to use the cache_from option: since we do not have any cache in the daemon, I tag the image twice, once with the commit hash and once with the branch name; in this way I can pull the php-cache service with the branch tag as a cache from the previous build. I hope that this (long) blog post will help people with this list of tips and tricks, and help save some time; many of the things that I wrote about here are not properly documented, so I learned them by trial and error and exercising some google-fu. I use 4 separated files: I will show you just the last file, which looks like this: I declared in my php service both the image and build sections, so Im able to use this definition in all my jobs, both for building and executing. Finally, as a lot of images are built, we can write a Cronjob to clear the cache regularly. Since 2008, the groups projects are based on PHP, and as time goes by new technologies become part of corporate know how. 2018-02-07 ERRATA: Stefano Torresi (privately) and /u/veloxlector (on Reddit) made me realize that my approach still requires a privileged runner, so that doesnt change with my approach; the privileged execution is always required when doing Docker-in-Docker. News, repos, tips & trends from the Facile.it Engineering team! This reduces my security claims, but my main aim was isolation. The shell instructions defined in the GitLab CI are then executed in this container. What are the possible attributes of aluminum-based blood? However, what happens when youre running your CI pipelines on Kubernetes? By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. This is needed because its possible to produce two identical images in two different builds, so we could be in the situation where the two tags point to the same image, and so nothing should be done. werf supports two operating modes: with and without a Docker server. To review, open the file in an editor that reveals hidden Unicode characters. - is or was? DinD (Docker in Docker) and KinD (Kubernetes in Docker) solved the nested requirement, Debugging gurobipy VRP implementation output that gives no error message. Also, is there a reason why you're mounting, Gitlab pipeline, kubernetes runner - How to configure, Learn more about Collectives on Stack Overflow, San Francisco? A few months ago did a demo at the Bristol WinOps Meetup showing an example Azure DevOps Build Pipeline for After, I decided to start migrating a previous, internal project of mine to the same approach, since its currently in production with a dumb approach that provokes some downtime during deployments; on the contrary, doing a rolling deployment with Kubernetes is surprisingly easy! software development through the continuous methodologies. Currently, this mode only supports Dockerfile-based building. registry-mirror=https://ot2k4d59.mirror.aliyuncs.com/, Helm Chart is compatible with different Kubernetes versions. The latter mode is experimental. This opens the doors to streamlined deployments, but creates another problem. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. How is Docker different from a virtual machine? Thank you for your hint about mounting docker.sock. Container orchestration solutions such as Kubernetes allow development teams to be quick and agile with their software deployments. This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. Then create a Service to facilitate the connection of the built Docker CLI to it. According to the Kubernetes documentation, you can create a new secret by executing the following with your username (below, k8s) and token: To check, run kubectl get secret regcred -o yaml. I then used grep twice: first to select the line of the output containing the header, and then to strip everything out except the digest. Thats the image were going to use in our example. Using Service Account for the Kubenetes executor. Basic runner configuration (/etc/gitlab-runner/config.toml): For more options, consult the Kubernetes executor for GitLab runner documentation. Require to enable podpreset alpha api. This means that you delete images, not tags; hence, if your image had multiple tags attached to it, youre cascade-deleting all related tags without knowing. Well show you how to use them below. The get-manifest.sh script will require 2 arguments, the full image name (again) and the JWT token (that we just obtained): This time we are using all the 3 variables from the splitImageName function, and we are issuing a HEAD request, because what we need is a header of the response: Docker-Content-Digest. The integration will leverage environment variables to feed the configuration to kubectl automatically, so you just have to issue commands with it, it will just work. Below is a description of the basic build and deploy job for a project: In case of problems, refer to the Troubleshooting section. You can use fuse-overlayfs if your system kernel does not support rootless OverlayFS. If youre on Windows or Mac, you may need to follow the Multipass guide first to get a VM with Ubuntu before you start. Depending on the users needs as well as the system parameters, there are three ways to use werf in Buildah mode in containers: In our case, we will use the most common and preferred operation mode #1 (unprivileged container with rootless OverlayFS). Ported by Julio Pescador Im basically bookmarking the array values for the only directive, so I can reuse them in the next CD jobs. I applied the same tricks as before, so I still write cache-friendly Dockerfiles, and I double-tag the images (with prod and prod-$CI_COMMIT_SHA) to use the previous one as cache, and to have a specific tag to use later, in the deploy job. Now, grab the git repository address and clone the repository to a directory of your choice. Using kubeconfig with the appropriate settings. The deployment with kubectl is pretty straightforward: using the kubectl set image command we set a new image in our deployment configuration; the cluster will detect that we specified a different image and it will automatically start a rolling deployment to substitute the available containers with the new, requested tag.
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