Duration: 4 hours

Affected Components: Checkmk Sites hosted in the US, Admin Panel, Checkmk Sites hosted in the EU

Jul 2, 05:00:01 GMT+0
Identified - Maintenance is now in progress.

Jul 2, 09:00:00 GMT+0
Completed - Maintenance has completed successfully.

Jul 2, 05:00:00 GMT+0
Identified - We will be conducting scheduled system maintenance on 02.07.2026 from 07:00 to 11:00 CET to enhance the performance, reliability, and security of Checkmk Cloud. **Details:** * **Maintenance Window:** 4 hours * **Expected Downtime for Client Sites:** Minimal (less than 20 minutes) * **Impact:** During the downtime, you will not be able to access your site, and the site will not be able to receive metrics or connections from Checkmk agents. We appreciate your understanding and cooperation as we work to improve your experience. Should you encounter any issues during or after the maintenance period, please contact our support team through the Support Portal..

Duration: 39 minutes

Affected Components: Checkmk Sites hosted in the EU

May 20, 18:00:39 GMT+0
Investigating - We are currently investigating an incident whereby email notifications from Checkmk are not being delivered. We are working with AWS to understand the root cause of this issue..

May 20, 18:39:47 GMT+0
Resolved - This incident has been resolved..

Duration: 15 minutes

Affected Components: Checkmk Sites hosted in the US, Admin Panel, Checkmk Sites hosted in the EU

Mar 13, 07:30:00 GMT+0
Identified - We will be conducting scheduled system maintenance tomorrow, Mar 12, 2026, from 08:30 to 08:45 CET to enhance system performance, reliability, and security of Checkmk Cloud. Details: Maintenance Window: 15 minutes Expected Downtime for Client Sites: Minimal (less than 5 minutes) Impact: During the downtime you will not be able to reach your site, nor will the site be able to receive metrics/connections from Checkmk agents. We appreciate your understanding and cooperation as we work to improve your experience. Should you encounter any issues after the maintenance period, please contact our support team through the Support Portal..

Mar 13, 07:30:01 GMT+0
Identified - Maintenance is now in progress.

Mar 13, 07:45:00 GMT+0
Completed - Maintenance has completed successfully.

Duration: 30 minutes

Affected Components: Checkmk Sites hosted in the US, Checkmk Sites hosted in the EU

Jan 19, 06:00:01 GMT+0
Identified - Maintenance is now in progress.

Jan 19, 06:30:00 GMT+0
Completed - Maintenance has completed successfully.

Jan 19, 06:00:00 GMT+0
Identified - We are upgrading the infrastructure nodes for all **Checkmk Sites** to ensure optimal monitoring performance. * **Expected Downtime:** Max 10 minutes per site. * **Action Required:** None. However, please note that site access will not be possible..

Duration: 6 hours and 37 minutes

Affected Components: Admin Panel

Dec 16, 10:33:07 GMT+0
Identified - We have identified the internal component that is the root cause of the issue. We are continuing to work on a fix for this incident..

Dec 16, 09:00:00 GMT+0
Investigating - New licenses cannot be activate at the moment. Existing licensed sites work as intended, users might encounter errors when visiting the licensing page. We are continuing to work on a fix for this incident..

Dec 16, 15:36:36 GMT+0
Resolved - This incident has been resolved..

Duration: 2 hours and 29 minutes

Affected Components: Checkmk Sites hosted in the US, Admin Panel, Checkmk Sites hosted in the EU

Dec 1, 06:00:01 GMT+0
Identified - Maintenance is now in progress.

Dec 1, 08:29:29 GMT+0
Completed - Maintenance has completed successfully..

Dec 1, 06:00:00 GMT+0
Identified - Maintenance Window: 4 hours Expected Downtime for Client Sites: Minimal (less than 20 minutes) Impact: During the downtime you will not be able to reach your site, nor will the site be able to receive metrics/connections from Checkmk agents. We appreciate your understanding and cooperation as we work to improve your experience. Should you encounter any issues during or after the maintenance period, please contact our support team through the Support Portal..

Duration: 41 minutes

Affected Components: Checkmk Sites hosted in the US, Checkmk Sites hosted in the EU

Nov 13, 08:31:27 GMT+0
Investigating - We are currently investigating this incident..

Nov 13, 09:05:42 GMT+0
Monitoring - We implemented a fix and are currently monitoring the result..

Nov 13, 09:12:29 GMT+0
Resolved - This incident has been resolved..

Duration: 1 day and 21 hours

Affected Components: Admin Panel

Oct 31, 15:00:00 GMT+0
Identified - During this period, license activation and creating new licensed sites will be unavailable. Service will be fully restored once maintenance is completed..

Oct 31, 15:00:01 GMT+0
Identified - Maintenance is now in progress.

Nov 2, 12:00:00 GMT+0
Completed - Maintenance has completed successfully.

Duration: 10 hours and 19 minutes

Affected Components: Checkmk Sites hosted in the US

Oct 20, 10:27:44 GMT+0
Identified - Due to an AWS STS outage in the US region, checkmk sites cannot be created in the US and email notifications from the US region are not being forwarded. We are keeping a close watch on any AWS updates on the issue..

Oct 20, 11:46:18 GMT+0
Monitoring - Most impacted AWS operations are recovering, we are monitoring the process..

Oct 20, 13:41:29 GMT+0
Monitoring - All email notifications have been re-queued, checkmk site creation is still in the process of recovering..

Oct 20, 16:52:37 GMT+0
Monitoring - Email notifications for Checkmk sites hosted in the US have started to experience issues. We are monitoring the developments closely..

Oct 20, 19:30:21 GMT+0
Monitoring - Email notifications are fully recovered, however the creation of new Checkmk sites in the US region is still impaired..

Oct 20, 20:46:47 GMT+0
Resolved - This incident has been resolved. Dependent AWS services have fully recovered..

Duration: 2 hours

Affected Components: Admin Panel

Oct 14, 05:00:00 GMT+0
Identified - What: we are upgrading our Admin Panel Email Gateway Downtime: no downtime for our existing service Impact: Everything will continue to work as usual except for email confirmation for new account sign-ups or password resets. During the maintenance window, new users will not be able to receive the activation code needed to complete registration or the password reset email..

Oct 14, 05:00:01 GMT+0
Identified - Maintenance is now in progress.

Oct 14, 07:00:00 GMT+0
Completed - Maintenance is now in progress.

Duration: 15 minutes

Affected Components: Admin Panel

Jul 17, 07:30:01 GMT+0
Identified - Maintenance is now in progress.

Jul 17, 07:30:00 GMT+0
Identified - We are planning scheduled maintenance during this time. Some UI services (like the Admin Panel) may be temporarily unavailable during the maintenance window. Checkmk sites will remain unaffected..

Jul 17, 07:45:00 GMT+0
Completed - Maintenance has completed successfully.

Duration: 2 hours and 33 minutes

Affected Components: Checkmk Sites hosted in the US, Checkmk Sites hosted in the EU, Admin Panel

Jun 18, 07:33:12 GMT+0
Completed - Maintenance has completed successfully..

Jun 18, 05:00:00 GMT+0
Identified - We will be conducting scheduled system maintenance on Thursday, June 18, 2025, from 07:00 to 11:00 CET to enhance system performance, reliability, and security of Checkmk Cloud. Expected Downtime for Client Sites: Minimal (less than 20 minutes) Impact: During the downtime you will not be able to reach your site, nor will the site be able to receive metrics/connections from checkmk agents. We appreciate your understanding and cooperation as we work to improve your experience..

Jun 18, 05:00:01 GMT+0
Identified - Maintenance is now in progress.

Duration: 38 minutes

Affected Components: Checkmk Sites hosted in the EU, Admin Panel

May 15, 06:38:18 GMT+0
Completed - Maintenance has been finished..

May 15, 06:00:00 GMT+0
Identified - We are planning a migration of AWS AMI which will end support soon and implement changes on network level. .

May 15, 06:00:01 GMT+0
Identified - Maintenance is now in progress.