gitlab Ignoring unsupported event

[13567436138]

Request details
POST
 http://atlantis.mark.demo:80/events
System Hook
Completed in 0.02 seconds (11 minutes ago)

Response 
200
Ignoring unsupported event
Headers
Content-Length: 27
Content-Type: text/plain; charset=utf-8
Date: Fri, 05 Dec 2025 10:46:50 GMT
Connection: close
Request
{
  "object_kind": "merge_request",
  "event_type": "merge_request",
  "user": {
    "id": 1,
    "name": "Administrator",
    "username": "root",
    "avatar_url": "https://www.gravatar.com/avatar/d840d80d14ea9482974fdd2e2cc8e5c999f492b2b7bc1b0358ff73330e60a7d8?s=80&d=identicon",
    "email": "[REDACTED]"
  },
  "project": {
    "id": 5,
    "name": "k8s-nginx",
    "description": null,
    "web_url": "http://gitlab.gitlab.demo/atlantis/k8s-nginx",
    "avatar_url": null,
    "git_ssh_url": "[email protected]:atlantis/k8s-nginx.git",
    "git_http_url": "http://gitlab.gitlab.demo/atlantis/k8s-nginx.git",
    "namespace": "atlantis",
    "visibility_level": 20,
    "path_with_namespace": "atlantis/k8s-nginx",
    "default_branch": "main",
    "ci_config_path": null,
    "homepage": "http://gitlab.gitlab.demo/atlantis/k8s-nginx",
    "url": "[email protected]:atlantis/k8s-nginx.git",
    "ssh_url": "[email protected]:atlantis/k8s-nginx.git",
    "http_url": "http://gitlab.gitlab.demo/atlantis/k8s-nginx.git"
  },
  "object_attributes": {
    "assignee_id": null,
    "author_id": 1,
    "created_at": "2025-12-05 10:46:40 UTC",
    "description": "",
    "draft": false,
    "head_pipeline_id": null,
    "id": 13,
    "iid": 1,
    "last_edited_at": null,
    "last_edited_by_id": null,
    "merge_commit_sha": "2fd668b338c99994f2feb0492bf70cf825dd5d2f",
    "merge_error": null,
    "merge_params": {},
    "merge_status": "can_be_merged",
    "merge_user_id": null,
    "merge_when_pipeline_succeeds": false,
    "milestone_id": null,
    "source_branch": "main",
    "source_project_id": 6,
    "state_id": 3,
    "target_branch": "main",
    "target_project_id": 5,
    "time_estimate": 0,
    "title": "11",
    "updated_at": "2025-12-05 10:46:49 UTC",
    "updated_by_id": null,
    "prepared_at": "2025-12-05 10:46:43 UTC",
    "assignee_ids": [],
    "blocking_discussions_resolved": true,
    "detailed_merge_status": "not_open",
    "first_contribution": true,
    "human_time_change": null,
    "human_time_estimate": null,
    "human_total_time_spent": null,
    "labels": [],
    "last_commit": {
      "id": "8886a6053ff8529a57108a22747cdef8dc9383c3",
      "message": "11\n",
      "title": "11",
      "timestamp": "2025-12-05T18:44:53+08:00",
      "url": "http://gitlab.gitlab.demo/atlantis/k8s-nginx/-/commit/8886a6053ff8529a57108a22747cdef8dc9383c3",
      "author": {
        "name": "Your Name",
        "email": "[REDACTED]"
      }
    },
    "reviewer_ids": [],
    "source": {
      "id": 6,
      "name": "k8s-nginx-fork",
      "description": null,
      "web_url": "http://gitlab.gitlab.demo/atlantis/k-8-s-nginx-fork",
      "avatar_url": null,
      "git_ssh_url": "[email protected]:atlantis/k-8-s-nginx-fork.git",
      "git_http_url": "http://gitlab.gitlab.demo/atlantis/k-8-s-nginx-fork.git",
      "namespace": "atlantis",
      "visibility_level": 20,
      "path_with_namespace": "atlantis/k-8-s-nginx-fork",
      "default_branch": "main",
      "ci_config_path": null,
      "homepage": "http://gitlab.gitlab.demo/atlantis/k-8-s-nginx-fork",
      "url": "[email protected]:atlantis/k-8-s-nginx-fork.git",
      "ssh_url": "[email protected]:atlantis/k-8-s-nginx-fork.git",
      "http_url": "http://gitlab.gitlab.demo/atlantis/k-8-s-nginx-fork.git"
    },
    "state": "merged",
    "system": false,
    "target": {
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      "name": "k8s-nginx",
      "description": null,
      "web_url": "http://gitlab.gitlab.demo/atlantis/k8s-nginx",
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      "git_ssh_url": "[email protected]:atlantis/k8s-nginx.git",
      "git_http_url": "http://gitlab.gitlab.demo/atlantis/k8s-nginx.git",
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      "ci_config_path": null,
      "homepage": "http://gitlab.gitlab.demo/atlantis/k8s-nginx",
      "url": "[email protected]:atlantis/k8s-nginx.git",
      "ssh_url": "[email protected]:atlantis/k8s-nginx.git",
      "http_url": "http://gitlab.gitlab.demo/atlantis/k8s-nginx.git"
    },
    "time_change": 0,
    "total_time_spent": 0,
    "url": "http://gitlab.gitlab.demo/atlantis/k8s-nginx/-/merge_requests/1",
    "work_in_progress": false,
    "action": "merge"
  },
  "labels": [],
  "changes": {
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      "current": "2fd668b338c99994f2feb0492bf70cf825dd5d2f"
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      "current": 3
    },
    "updated_at": {
      "previous": "2025-12-05 10:46:43 UTC",
      "current": "2025-12-05 10:46:49 UTC"
    }
  },
  "repository": {
    "name": "k8s-nginx",
    "url": "[email protected]:atlantis/k8s-nginx.git",
    "description": null,
    "homepage": "http://gitlab.gitlab.demo/atlantis/k8s-nginx"
  }
}
Headers
Content-Type: application/json
User-Agent: GitLab/18.5.1
Idempotency-Key: 4054f954-5247-416f-a4ff-24f73025e024
X-Gitlab-Event: System Hook
X-Gitlab-Webhook-UUID: 2256fbe7-65cc-4392-9f2f-e0111fd824a7
X-Gitlab-Instance: http://gitlab.gitlab.demo
X-Gitlab-Token: [REDACTED]
X-Gitlab-Event-UUID: c1fb7cf8-61e5-4672-9c08-366fddde518d

[dosubot[bot]]

Atlantis ignores GitLab System Hook events because it only supports GitLab Project Webhooks for actionable events. Specifically, Atlantis expects the X-Gitlab-Event header to be either Merge Request Hook (for merge requests) or Note Hook (for comments). If the header is System Hook, as with your request, Atlantis will respond with "Ignoring unsupported event" and not process the payload (source).

To have Atlantis process merge request events, set up a Project Webhook in your GitLab project (not a System Hook). In the webhook settings, select the "Merge request events" and "Comments" (if you want Atlantis to react to comments), and point the webhook URL to your Atlantis /events endpoint. This will ensure GitLab sends the correct event headers and payloads that Atlantis can handle. No further Atlantis configuration is needed unless you want to use a webhook secret.

To reply, just mention @dosu.

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[13567436138]

yes your are wright