| **CI_MERGE_REQUEST_TARGET_BRANCH_NAME** | 11.6 | all | The target branch name of the merge request if it's [pipelines for merge requests](../merge_request_pipelines/index.md) |
| **CI_NODE_INDEX** | 11.5 | all | Index of the job in the job set. If the job is not parallelized, this variable is not set. |
| **CI_NODE_TOTAL** | 11.5 | all | Total number of instances of this job running in parallel. If the job is not parallelized, this variable is set to `1`. |
| **CI_PIPELINE_ID** | 8.10 | 0.5 | The unique id of the current pipeline that GitLab CI uses internally |
| **CI_API_V4_URL** | 11.7 | all | The GitLab API v4 root URL |
| **CI_PIPELINE_ID** | 8.10 | all | The unique id of the current pipeline that GitLab CI uses internally |
| **CI_PIPELINE_IID** | 11.0 | all | The unique id of the current pipeline scoped to project |
| **CI_PIPELINE_SOURCE** | 10.0 | all | Indicates how the pipeline was triggered. Possible options are: `push`, `web`, `trigger`, `schedule`, `api`, and `pipeline`. For pipelines created before GitLab 9.5, this will show as `unknown` |
| **CI_PIPELINE_TRIGGERED** | all | all | The flag to indicate that job was [triggered] |
