--- stage: Verify group: Pipeline Execution info: To determine the technical writer assigned to the Stage/Group associated with this page, see https://about.gitlab.com/handbook/engineering/ux/technical-writing/#assignments --- # GitLab CI/CD job token When a pipeline job is about to run, GitLab generates a unique token and injects it as the [`CI_JOB_TOKEN` predefined variable](../variables/predefined_variables.md). You can use a GitLab CI/CD job token to authenticate with specific API endpoints: - Packages: - [Package Registry](../../user/packages/package_registry/index.md#use-gitlab-cicd-to-build-packages). - [Container Registry](../../user/packages/container_registry/index.md#build-and-push-by-using-gitlab-cicd) (the `$CI_REGISTRY_PASSWORD` is `$CI_JOB_TOKEN`). - [Container Registry API](../../api/container_registry.md) (scoped to the job's project, when the `ci_job_token_scope` feature flag is enabled). - [Get job artifacts](../../api/job_artifacts.md#get-job-artifacts). - [Get job token's job](../../api/jobs.md#get-job-tokens-job). - [Pipeline triggers](../../api/pipeline_triggers.md), using the `token=` parameter. - [Release creation](../../api/releases/index.md#create-a-release). - [Terraform plan](../../user/infrastructure/index.md). The token has the same permissions to access the API as the user that executes the job. Therefore, this user must be assigned to [a role that has the required privileges](../../user/permissions.md#gitlab-cicd-permissions). The token is valid only while the pipeline job runs. After the job finishes, you can't use the token anymore. A job token can access a project's resources without any configuration, but it might give extra permissions that aren't necessary. There is [a proposal](https://gitlab.com/groups/gitlab-org/-/epics/3559) to redesign the feature for more strategic control of the access permissions. You can also use the job token to authenticate and clone a repository from a private project in a CI/CD job: ```shell git clone https://gitlab-ci-token:${CI_JOB_TOKEN}@gitlab.example.com// ``` ## GitLab CI/CD job token security To make sure that this token doesn't leak, GitLab: - Masks the job token in job logs. - Grants permissions to the job token only when the job is running. To make sure that this token doesn't leak, you should also configure your [runners](../runners/index.md) to be secure. Avoid: - Using Docker's `privileged` mode if the machines are re-used. - Using the [`shell` executor](https://docs.gitlab.com/runner/executors/shell.html) when jobs run on the same machine. If you have an insecure GitLab Runner configuration, you increase the risk that someone tries to steal tokens from other jobs. ## Limit GitLab CI/CD job token access > - [Introduced](https://gitlab.com/gitlab-org/gitlab/-/issues/328553) in GitLab 14.1. > - [Deployed behind a feature flag](../../user/feature_flags.md), disabled by default. > - Disabled on GitLab.com. > - Not recommended for production use. > - To use in GitLab self-managed instances, ask a GitLab administrator to [enable it](#enable-or-disable-ci-job-token-scope-limit). **(FREE SELF)** This in-development feature might not be available for your use. There can be [risks when enabling features still in development](../../administration/feature_flags.md#risks-when-enabling-features-still-in-development). Refer to this feature's version history for more details. You can limit the access scope of a project's CI/CD job token to increase the job token's security. A job token might give extra permissions that aren't necessary to access specific private resources. Limiting the job token access scope reduces the risk of a leaked token being used to access private data that the user associated to the job can access. Control the job token access scope with an allowlist of other projects authorized to be accessed by authenticating with the current project's job token. By default the token scope only allows access to the same project where the token comes from. Other projects can be added and removed by maintainers with access to both projects. This setting is enabled by default for all new projects, and disabled by default in projects created before GitLab 14.1. It is strongly recommended that project maintainers enable this setting at all times, and configure the allowlist for cross-project access if needed. For example, when the setting is enabled, jobs in a pipeline in project `A` have a `CI_JOB_TOKEN` scope limited to project `A`. If the job needs to use the token to make an API request to a private project `B`, then `B` must be added to the allowlist for `A`. If project `B` is public or internal, it doesn't need to be added to the allowlist. The job token scope is only for controlling access to private projects. ### Configure the job token scope limit 1. On the top bar, select **Menu > Projects** and find your project. 1. On the left sidebar, select **Settings > CI/CD**. 1. Expand **Token Access**. 1. Toggle **Limit CI_JOB_TOKEN access** to enabled. 1. (Optional) Add existing projects to the token's access scope. The user adding a project must have the [maintainer role](../../user/permissions.md) in both projects. If the job token scope limit is disabled, the token can potentially be used to authenticate API requests to all projects accessible to the user that triggered the job. There is [a proposal](https://gitlab.com/groups/gitlab-org/-/epics/3559) to improve the feature with more strategic control of the access permissions. ### Enable or disable CI job token scope limit **(FREE SELF)** The GitLab CI/CD job token access scope limit is under development and not ready for production use. It is deployed behind a feature flag that is **disabled by default**. [GitLab administrators with access to the GitLab Rails console](../../administration/feature_flags.md) can enable it. To enable it: ```ruby Feature.enable(:ci_scoped_job_token) ``` To disable it: ```ruby Feature.disable(:ci_scoped_job_token) ``` ## Trigger a multi-project pipeline by using a CI job token > `CI_JOB_TOKEN` for multi-project pipelines was [moved](https://gitlab.com/gitlab-org/gitlab/-/issues/31573) from GitLab Premium to GitLab Free in 12.4. You can use the `CI_JOB_TOKEN` to trigger [multi-project pipelines](../pipelines/multi_project_pipelines.md) from a CI/CD job. A pipeline triggered this way creates a dependent pipeline relation that is visible on the [pipeline graph](../pipelines/multi_project_pipelines.md#multi-project-pipeline-visualization). For example: ```yaml trigger_pipeline: stage: deploy script: - curl --request POST --form "token=$CI_JOB_TOKEN" --form ref=main "https://gitlab.example.com/api/v4/projects/9/trigger/pipeline" rules: - if: $CI_COMMIT_TAG ``` If you use the `CI_PIPELINE_SOURCE` [predefined CI/CD variable](../variables/predefined_variables.md) in a pipeline triggered this way, [the value is `pipeline` (not `triggered`)](../triggers/index.md#authentication-tokens). ## Download an artifact from a different pipeline **(PREMIUM)** > `CI_JOB_TOKEN` for artifacts download with the API was [introduced](https://gitlab.com/gitlab-org/gitlab/-/merge_requests/2346) in GitLab 9.5. You can use the `CI_JOB_TOKEN` to access artifacts from a job created by a previous pipeline. You must specify which job you want to retrieve the artifacts from: ```yaml build_submodule: stage: test script: - apt update && apt install -y unzip - curl --location --output artifacts.zip "https://gitlab.example.com/api/v4/projects/1/jobs/artifacts/main/download?job=test&job_token=$CI_JOB_TOKEN" - unzip artifacts.zip ``` Read more about the [jobs artifacts API](../../api/job_artifacts.md#download-the-artifacts-archive). ## Troubleshooting CI job token failures are usually shown as responses like `404 Not Found` or similar: - Unauthorized Git clone: ```plaintext $ git clone https://gitlab-ci-token:$CI_JOB_TOKEN@gitlab.com/fabiopitino/test2.git Cloning into 'test2'... remote: The project you were looking for could not be found or you don't have permission to view it. fatal: repository 'https://gitlab-ci-token:[MASKED]@gitlab.com//.git/' not found ``` - Unauthorized package download: ```plaintext $ wget --header="JOB-TOKEN: $CI_JOB_TOKEN" ${CI_API_V4_URL}/projects/1234/packages/generic/my_package/0.0.1/file.txt --2021-09-23 11:00:13-- https://gitlab.com/api/v4/projects/1234/packages/generic/my_package/0.0.1/file.txt Resolving gitlab.com (gitlab.com)... 172.65.251.78, 2606:4700:90:0:f22e:fbec:5bed:a9b9 Connecting to gitlab.com (gitlab.com)|172.65.251.78|:443... connected. HTTP request sent, awaiting response... 404 Not Found 2021-09-23 11:00:13 ERROR 404: Not Found. ``` - Unauthorized API request: ```plaintext $ curl --verbose --request POST --form "token=$CI_JOB_TOKEN" --form ref=master "https://gitlab.com/api/v4/projects/1234/trigger/pipeline" < HTTP/2 404 < date: Thu, 23 Sep 2021 11:00:12 GMT {"message":"404 Not Found"} < content-type: application/json ``` While troubleshooting CI/CD job token authentication issues, be aware that: - When the [CI/CD job token limit](#limit-gitlab-cicd-job-token-access) is enabled, and the job token is being used to access a different project: - The user that executes the job must be a member of the project that is being accessed. - The user must have the [permissions](../../user/permissions.md) to perform the action. - The target project must be [allowlisted for the job token scope limit](#configure-the-job-token-scope-limit). - The CI job token becomes invalid if the job is no longer running, has been erased, or if the project is in the process of being deleted.