docker in docker kubernetes gitlab

NOTICE: werf currently supports building images with the Docker server or without the Docker server (in experimental mode). This reduces my security claims, but my main aim was isolation. Instead of running a sidecar container with Docker DIND service for each Pod, lets run a standalone Docker DIND container with all the Docker CLIs of the build container connected to this one Docker daemon, where we persist the Docker layer layer, which also serves as a cache. - is or was? Disclaimer The alternative Stapel builder will be available in the near future. kubernetes. Asking for help, clarification, or responding to other answers. rev2022.8.2.42721. warm up the Symfony cache, so we ship that with the image too. Last week I was tasked with increasing the size of some Persistent Volumes (PV) for one of the apps running on After that, you can build the image using the new mode and automate the assembly process using the Kubernetes executor in GitLab CI/CD. It contains the werf 1.2-stable and is based on Alpine Linux (hence its full name is ghcr.io/werf/werf:1.2-stable-alpine). After many trial & error attempts, I obtained this workflow: when: always is needed to run the job even if the build fails. If I need multiple services, like for functional tests, I do it like this: If instead I need to execute just simple tasks, without external services, I can skip the pull command completely: This is possible because I need just one image which will be pulled implicitly by Docker Compose, so the --parallel option is useless here; I also have to remember to use --no-deps to avoid pulling linked services, if for example my base configuration defines a dependency to other containers (like the database). To build your container, execute the command below: Before you can push to the repository, you need to log in to Docker: If the login was successful, you should see a message similar to this : We can then push to your projects repository: Before you can pull from the private repository, in order for the pulling to go through, you need to create a secret for Kubernetes. Announcing Design Accessibility Updates on SO. The first instruction logs into the private Docker registry that GitLab gives us along any project (if enabled), in which I decided to store my Docker images. This page contains information applicable only to the experimental mode without the Docker server. The build job is defined like this: Then we can pass onto the test stage. How do we streamline? Could one house of Congress completely shut down the other house by passing large amounts of frivolous bills? service docker-dind(or without it, from Gitlab 12+), and all works great. The GitLab CI is configurable just by adding a .gitlab-ci.yml file to the root of your project. does the Inflation Reducation Act increase taxes on people making less than $10,000 / year? Lets go into the Dockerfile and add this line just before CMD: And update the deployment with the new image tag: In this tutorial, you learnt how to use GitLab as a container repository, albeit with some human labour involved. The main feature of these orchestration tools is the ability to reduce the deployment of a version piece of software down to a simple tag name on the end of a string. Functional programming If youre on Windows or Mac, you may need to follow the Multipass guide first to get a VM with Ubuntu before you start. 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. This article discusses the new experimental werf operating mode that does not require a Docker server to be run. How to copy files from host to Docker container? If you dont wish to use a private repository, then you can use these steps as a guide, ignoring the generate token steps. Now for the final step. Popular DevOps tools like Packer and Ansible come with the ability to do interactive debugging, which is Then deploy a Docker DIND service using Deployment. Note that you have to run werf in a. Linux kernel without rootless OverlayFS and a non-privileged container with additional settings: Similar to the previous mode, Buildah and werf will use fuse-overlayfs as the file system. Using the YAML anchor reference *deployable-branches (yes, they use a pointer-like syntax) I reuse the previous values, so if I decide to deploy a new, particular branch, I dont have to specify it in every deploy-related job, and risk forgetting one (yes, it happened to me). To use fuse-overlayfs without a privileged container, run werf in a container with the following parameters: The first one involves a Service Account for the Kubenetes executor. To add it, you need to edit the deployment: Under the containers spec, add imagePullSecrets as follows: Check the pods again; now, your container should have started. When operating in the latter mode, werf uses the built-in Buildah in rootless mode instead of the Docker server/client. Without that check, the install job will In the case of GitLab CI/CD, you can use the Docker executor for builds. Proposed temporary solution in this deployment. 2022 The problem was the Helm Chart test pipeline required a nested Kubernetes environment, as our self-hosted Finally, as a lot of images are built, we can write a Cronjob to clear the cache regularly. Note that using a commit-specific tag is critical here, because otherwise the deployment will not be triggered; if you want to trigger a deploy without using specific tags, you will have to append the SHA digests of the image, with image:[emailprotected]${SHA}; this will obviously mean that you will have to retrieve it, which can be less practical. We strongly recommend checking the werf documentation for a detailed description of all the available operating modes that do not require a Docker server to be run, as well as for issues that may arise and solutions for them. Learn more about bidirectional Unicode characters. software development through the continuous methodologies. Lets start with the program. The last thing that I could add to this deploy pipeline is the cleanup in case the deployment fails; it would be identical to the delete-ci-image, with the only exceptions that I would use the prod commit-specific tags and I would set when: failure option. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. 2) You enable podPreset api(currenlty in alpha) and use podPreset api to inject DOCKER_HOST variable. Is the US allowed to execute a airstrike on Afghan soil after withdrawal? It falls back to sorting by highest score if no posts are trending. This issue is particularly annoying because theres no automated feature in the GitLabs registry to clean them up, up to the point where there are multiple, long-standing issues still open on their tracker about this problem: Last but not least, Docker tags are not first class citizens for the Docker registry API (see this GitHub issue and the related PR). How is Docker different from a virtual machine? Design HTML5 UP ", REST Endpoint using MIT and BSD 3-clause license libraries. overall GitLab documentation is some of the best out there, however, not all use-cases for using GitLab CI are The image option allows you to require a different base image in which to execute each job of the pipeline. 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. The second instruction depends on how I organized my Docker Compose files to help me during development and in the pipeline too. essential when troubleshooting issues quickly. The script that pushes the dummy image, dummy-tag.sh, accepts as a single argument the full Docker image name complete with tag: Using FROM scratch Im able to create an empty image (see docs), so the final result is ~100 bytes, probably the smallest possible. If the next build will produce a different image, the fact that the multiple previous tags point to the same image will mean that the cascade deletion will take care of all with a single action. This job can also be duplicated if you need to build multiple images with each deployment. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. DinD (Docker in Docker) and KinD (Kubernetes in Docker) solved the nested requirement, 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. volumes: The relevant GitLab Runner config is shown below: Ive uploaded the full retrieve a JWT token for the registry, as before; retrieve the SHA digest of the previous image, using the generic tag. In my case the image is pretty simple, because its created from the base Docker image, and has in addition Docker Compose and kubectl, the command line interface for Kubernetes. You can learn more about all the available images here. Now that we have everything that we need, we can finally use the delete-image.sh script; it requires three arguments: We are issuing a DELETE request to the manifest endpoint, using the SHA digest as an identifier for the specific resource that we want to delete; this last API endpoint looks like the previous one: Now that we have our CI pipeline in place, we can start doing continuous deployment! On hosted runners, you can build docker images transparently with. This opens the doors to streamlined deployments, but creates another problem. Require to enable podpreset alpha api. A few months ago did a demo at the Bristol WinOps Meetup showing an example Azure DevOps Build Pipeline for A Docker server is not required in Linux operating systems where werf can natively use Buildah. Lets look at how you can use the new mode to build images in Kubernetes without a Docker server. PowerShell modules. In your terminal, use your favorite editor (below, vi) to open a new file, main.py: Now that that is done, you can move on to the Dockerfile: You can now build your container but, before this, you need to enable container registries on Gitlab and grab the URL. werf will automatically use this configuration to connect to the target Kubernetes cluster. late than never! This method works well if the Kubernetes executors cluster and the target Kubernetes cluster are different. The Up until now, it was all straightforward and easy; the difficult part comes with the last stage, the cleanup. You can use fuse-overlayfs if your system kernel does not support rootless OverlayFS. 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! Getting paid by mistake after leaving a company? Then, I start adding stuff on top, using this sequence: In this way, Im literally caching my vendor folder inside a single Docker image layer, and changing the Composer files will automatically invalidate that cache; also, copying all the other source files later allows me to not lose that layer when the vendor shouldnt change. You can swapping my config in for yours (make a backup of your old config first) and see if it works. configuration was used for the Helm Chart pipeline (some code removed for brevity): Note the install.before_script that waits for docker to be responsive. 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. application. Running gitlab runner in own-hosted kubernetes via official chart, with separate dind deployment and transparent injection DOCKER_HOST in runner pod. I have problem with running docker in kubernetes runner. 468), Monitoring data quality with Bigeye(Ep. What rating point advantage does playing White equate to? Its obviously needed to make the job run only on certain branches, but the interesting part is the appended &deployable-branches string: its a YAML anchor. Why classical mechanics is not able to explain the net magnetization in ferromagnets?

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