Both containers (the temporary one and the actual gitlab-runner instance) share a volume together -v /srv/gitlab-runner/config:/etc/gitlab-runner in which the registration token is stored. The actual instance of the runner can then use that token from the generated config to authenticate with the gitlab instance.

Answer from pat on Stack Overflow
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GitLab
docs.gitlab.com › runner › register
Registering runners | GitLab Docs
Command-line arguments or environment ... For example, if the template specifies a docker executor, but the command line specifies shell, the configured executor is shell. To test GitLab Community Edition integrations, use a configuration template to register a runner with a confined ...
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GitLab
docs.gitlab.com › runner › install › docker
Run GitLab Runner in a container | GitLab Docs
In MacOS systems, /srv does not exist by default. Create /private/srv, or another private directory, for setup. ... docker run -d --name gitlab-runner --restart always \ -v /srv/gitlab-runner/config:/etc/gitlab-runner \ -v /var/run/docker.sock:/var/run/docker.sock \ gitlab/gitlab-runner:latest
Discussions

How does Gitlab register a runner on a Docker container? - Stack Overflow
This documentation basically instructs me to (1) run the runner and then (2) register it: ... docker run -d --name my-gitlab-runner --restart always \ -v /srv/gitlab-runner/config:/etc/gitlab-runner \ -v /var/run/docker.sock:/var/run/docker.sock \ gitlab/gitlab-runner:latest More on stackoverflow.com
🌐 stackoverflow.com
docker - Configure gitlab-runner using a Dockerfile - Stack Overflow
According to gitlab documentation, I wrote down the following Dockerfile: FROM gitlab/gitlab-runner:latest RUN gitlab-runner register \ --non-interactive \ --url "https://gitlab.com/" \ --registration-token "GITLAB_REPO_TOKEN" \ --executor "docker" \ --docker-image alpine:latest \ --description ... More on stackoverflow.com
🌐 stackoverflow.com
Example GitLab Runner docker compose configuration
After having spent some time the other day to redo my (“standalone”) runner setup, I figured that I would share this for the benefit of the community. .env: RUNNER_NAME=RUNNER-NAME REGISTRATION_TOKEN=TOKEN CI_SERVER_UR… More on forum.gitlab.com
🌐 forum.gitlab.com
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March 26, 2022
GitLab Runner in Docker
I’d suggest setting up your runners using the docker executor - https://docs.gitlab.com/runner/executors/docker.html This allows your runner to start up fresh containers for jobs with the image you specify, meaning jobs aren’t running on the host and can have whatever you need. You can then also use a single runner with parallelism instead of multiple runners. Downside is that if you need to install extras they will need to install as part of the CI on every job. More on reddit.com
🌐 r/gitlab
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August 31, 2023
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Medium
medium.com › @BuildWithLal › dockerized-gitlab-ci-setting-up-and-connecting-your-gitlab-runner-b810a02e42f2
Dockerized GitLab CI: Setting Up and Connecting Your GitLab Runner | by Lal Zada | Medium
October 10, 2024 - After updating the docker-compose.yml file, hit CTRL+C to stop the running container and then run ... Keep watching for the health status of both Gitlab Server and Runner containers. ... Once both are healthy, you can go back to the Runner page for your project here http://localhost:8000/root/build-with-lal/-/settings/ci_cd under ... Click on the New project runner and follow the same steps as we followed earlier to generate command for registering GitLab runner which will look like this
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GitLab
docs.gitlab.com › runner › executors › docker
Docker executor | GitLab Docs
To achieve this, you can either: Create your own custom build image and include the step-runner binary in it. Use the registry.gitlab.com/gitlab-org/step-runner:v0 image if it includes the dependencies you need to run your job. Running a step that runs a Docker container must adhere to the ...
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Medium
medium.com › @BuildWithLal › dockerized-gitlab-ci-register-docker-executor-as-a-gitlab-runner-71799352c9ac
Dockerized GitLab CI: Register Docker Executor as a GitLab Runner | by Lal Zada | Medium
October 10, 2024 - Once you have updated docker-compose.yml, hit CTRL+C to stop running containers and then run ... Existing runner is the Shell executor we created in our last post. ... Fill out the runner details. Make sure to add tags so we can run different jobs by specifying a specific runner using these tags. ... Once logged in to the GitLab runner container, run command from the above Step 1. Make sure to add these flags to the end of the gitlab-runner register …
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Awsworkshop
gitlab.awsworkshop.io › 050_lab_2 › 52_runner.html
Install and register Runner :: MP DevOps Series
You will be prompt to enter registration token, copy it from the Runner settings. Paste it in the console. Enter Description for the runner: type GitLab workshop. ... Enter executor, type docker.
Find elsewhere
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GitLab
docs.gitlab.com › runner
GitLab Runner | GitLab Docs
Enables caching of Docker containers. Seamless installation as a service for GNU/Linux, macOS, and Windows. Embedded Prometheus metrics HTTP server. Referee workers to monitor and pass Prometheus metrics and other job-specific data to GitLab. This diagram shows how runners are registered and how ...
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GitLab
docs.gitlab.com › ee › ci › docker › using_docker_build.html
Use Docker to build Docker images | GitLab Docs
May 8, 2023 - DOCKER_HOST: "unix:///runner/s... TLS. For example, you have no control over the GitLab Runner configuration that you are using. Register GitLab Runner from command line....
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GitLab
docs.gitlab.com › ci › docker › using_docker_images
Run your CI/CD jobs in Docker containers | GitLab Docs
You can add configuration for as many registries as you want, adding more registries to the "auths" hash as described previously. The full hostname:port combination is required everywhere for the runner to match the DOCKER_AUTH_CONFIG. For example, if registry.example.com:5000/namespace/image:tag is specified in the .gitlab-ci.yml file, then the DOCKER_AUTH_CONFIG must also specify registry.example.com:5000.
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GitHub
gist.github.com › benoitpetit › cbe19cdd369ec8c1e0defd245d91751f
complete Gitlab installation and a runner with docker · GitHub
(Outside the Docker container), the script connects to the container. For further automation, manual intervention is required, as I have not proceeded with automation beyond this point. ... Thanks! :-) I found an auto register version for the runner for inspiration of your work and this combined might be helpful for those passing by: https://gitlab.com/TyIsI/gitlab-runner-docker-compose/-/blob/main/docker-compose.yml?ref_type=heads
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GitLab
docs.gitlab.com › runner › executors › docker_machine
Install and register GitLab Runner for autoscaling with Docker Machine | GitLab Docs
You can now safely install the new version of GitLab Runner without interrupting any jobs. Download the appropriate docker-machine binary. Copy the binary to a location accessible to PATH and make it executable. For example, to download and install v0.16.2-gitlab.44:
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Docker Hub
hub.docker.com › r › flakm › gitlab-runner-auto-register
flakm/gitlab-runner-auto-register - Docker Image
REGISTRATION_TOKEN="" docker run -d -e CI_SERVER_URL="https://gitlab.com/" \ -e REGISTRATION_TOKEN="$REGISTRATION_TOKEN" \ --name gitlab-runner \ -v /var/run/docker.sock:/var/run/docker.sock \ flakm/gitlab-runner-auto-register:latest Copy
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GitLab
docs.gitlab.com › user › get_started › get_started_runner
Get started with GitLab Runner | GitLab Docs
You can configure GitLab Runners by editing the config.toml file, which is automatically generated when you install and register a runner. In this file you can edit settings for a specific runner, or for all runners. Configure it to set concurrency limits, logging levels, cache settings, CPU limits, and executor-specific parameters. Use consistent configurations across your runner fleet.
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TestDriven.io
testdriven.io › blog › gitlab-ci-docker
Deploying Self-Hosted GitLab CI Runners with Docker | TestDriven.io
October 29, 2021 - Run the following command to register a new runner, making sure to replace <YOUR-GITLAB-REGISTRATION-TOKEN> and <YOUR-GITLAB-URL> with your group's registration token and URL: $ docker-compose exec gitlab-runner-container \ gitlab-runner register \ --non-interactive \ --url <YOUR-GITLAB-URL> \ --registration-token <YOUR-GITLAB-REGISTRATION-TOKEN> \ --executor docker \ --description "Sample Runner 1" \ --docker-image "docker:stable" \ --docker-volumes /var/run/docker.sock:/var/run/docker.sock
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GitLab
docs.gitlab.com › runner › commands
GitLab Runner commands | GitLab Docs
gitlab-runner run-single -u http://gitlab.example.com -t my-runner-token --executor docker --docker-image ruby:3.3
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ETSI
labs.etsi.org › help › help
Using docker images · Docker · Ci · Help · GitLab
To build the custom GitLab Runner Docker image in a .gitlab-ci.yml, include the following example: variables: DOCKER_DRIVER: overlay2 IMAGE_NAME: $CI_REGISTRY_IMAGE:$CI_COMMIT_REF_NAME GITLAB_RUNNER_VERSION: v17.3.0 AWS_CLI_VERSION: 2.17.36 stages: - build build-image: stage: build script: - echo "Logging into GitLab container registry..."
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Hostman
hostman.com › tutorials › installing and using gitlab runner
Setting Up and Utilizing GitLab Runner | Hostman
December 29, 2025 - docker run --rm -it -v ... GitLab instance. For example, if your project is located at https://gitlab.test1.com/projects/testproject, then the URL will be https://gitlab.test1.com....
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GitLab
forum.gitlab.com › gitlab ci/cd
Example GitLab Runner docker compose configuration - GitLab CI/CD - GitLab Forum
March 26, 2022 - After having spent some time the other day to redo my (“standalone”) runner setup, I figured that I would share this for the benefit of the community. .env: RUNNER_NAME=RUNNER-NAME REGISTRATION_TOKEN=TOKEN CI_SERVER_URL=https://gitlab.com/ docker-compose.yml: version: "3.5" services: dind: image: docker:20-dind restart: always privileged: true environment: DOCKER_TLS_CERTDIR: "" command: - --storage-driver=overlay2 runner: restart: always image:...