# Label overrides supported with the CodeBuild-hosted GitLab runner
<a name="gitlab-runners-update-labels"></a>

In your GitLab CI/CD pipeline YAML, you can provide a variety of label overrides that modify your self-managed runner build. Any builds not recognized by CodeBuild will be ignored but will not fail your webhook request. For example, the following YAML includes overrides for image, instance size, fleet, and the buildspec:

```
workflow:
  name: HelloWorld
stages:
  - build

build-job:
  stage: build
  script:
    - echo "Hello World!"
  tags:
    - codebuild-myProject-$CI_PROJECT_ID-$CI_PIPELINE_IID-$CI_JOB_NAME
    - image:arm-3.0
    - instance-size:small
    - fleet:myFleet
    - buildspec-override:true
```

`codebuild-<project-name>-$CI_PROJECT_ID-$CI_PIPELINE_IID-$CI_JOB_NAME` (required)
+ Example: `codebuild-myProject-$CI_PROJECT_ID-$CI_PIPELINE_IID-$CI_JOB_NAME`
+ Required for all GitLab CI/CD pipeline YAMLs. *<project name>* should be equal to the name of the project for which the self-managed runner webhook is configured.

`image:<environment-type>-<image-identifier>`
+ Example: `image:arm-3.0`
+ Overrides the image and environment type used when starting the self-managed runner build. To learn about supported values, see [Compute images supported with the CodeBuild-hosted GitLab runner](sample-gitlab-runners-gitlab-ci.images.md).
  + To override the image and environment type used with a custom image, use `image:custom-<environment-type>-<custom-image-identifier>`
  + Example: `image:custom-arm-public.ecr.aws/codebuild/amazonlinux-aarch64-standard:3.0`
**Note**  
If the custom image resides in a private registry, see [Configure a private registry credential for self-hosted runners](private-registry-sample-configure-runners.md).

`instance-size:<instance-size>`
+ Example: `instance-size:small`
+ Overrides the instance type used when starting the self-managed runner build. To learn about supported values, see [Compute images supported with the CodeBuild-hosted GitLab runner](sample-gitlab-runners-gitlab-ci.images.md).

`fleet:<fleet-name>`
+ Example: `fleet:myFleet`
+ Overrides the fleet settings configured on your project to use the specified fleet. For more information, see [Run builds on reserved capacity fleets](fleets.md).

`buildspec-override:<boolean>`
+ Example: `buildspec-override:true`
+ Allows the build to run buildspec commands in the `INSTALL`, `PRE_BUILD`, and `POST_BUILD` phases if set to `true`.