Checkmk SaaS Status - Incident history https://status.checkmk.cloud Checkmk SaaS Thu, 2 Jul 2026 05:00:00 +0000 System Maintenance Type: Maintenance 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. Type: Maintenance

Duration: 4 hours

Affected Components: , ,

<p><small>Jul <var data-var='date'> 2</var>, <var data-var='time'>05:00:01</var> GMT+0</small><br><strong>Identified</strong> - Maintenance is now in progress.</p> <p><small>Jul <var data-var='date'> 2</var>, <var data-var='time'>09:00:00</var> GMT+0</small><br><strong>Completed</strong> - Maintenance has completed successfully.</p> <p><small>Jul <var data-var='date'> 2</var>, <var data-var='time'>05:00:00</var> GMT+0</small><br><strong>Identified</strong> - 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..</p> ]]> Thu, 2 Jul 2026 05:00:00 +0000 https://status.checkmk.cloud/maintenance/cmpqzyn21043wqpm4d6506wap https://status.checkmk.cloud/maintenance/cmpqzyn21043wqpm4d6506wap Email notifications are not being delivered Type: Incident 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. Type: Incident

Duration: 39 minutes

Affected Components:

<p><small>May <var data-var='date'> 20</var>, <var data-var='time'>18:00:39</var> GMT+0</small><br><strong>Investigating</strong> - 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..</p> <p><small>May <var data-var='date'> 20</var>, <var data-var='time'>18:39:47</var> GMT+0</small><br><strong>Resolved</strong> - This incident has been resolved..</p> ]]> Wed, 20 May 2026 18:00:39 +0000 https://status.checkmk.cloud/incident/cmpedaxlz00qrnvct2bjvfqgj https://status.checkmk.cloud/incident/cmpedaxlz00qrnvct2bjvfqgj Scheduled maintenance Type: Maintenance 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 Type: Maintenance

Duration: 15 minutes

Affected Components: , ,

<p><small>Mar <var data-var='date'> 13</var>, <var data-var='time'>07:30:00</var> GMT+0</small><br><strong>Identified</strong> - 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..</p> <p><small>Mar <var data-var='date'> 13</var>, <var data-var='time'>07:30:01</var> GMT+0</small><br><strong>Identified</strong> - Maintenance is now in progress.</p> <p><small>Mar <var data-var='date'> 13</var>, <var data-var='time'>07:45:00</var> GMT+0</small><br><strong>Completed</strong> - Maintenance has completed successfully.</p> ]]> Fri, 13 Mar 2026 07:30:00 +0000 https://status.checkmk.cloud/maintenance/cmmng5j50001zpm7qxbt4s5rd https://status.checkmk.cloud/maintenance/cmmng5j50001zpm7qxbt4s5rd Client Site Node Upgrades Type: Maintenance 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. Type: Maintenance

Duration: 30 minutes

Affected Components: ,

<p><small>Jan <var data-var='date'> 19</var>, <var data-var='time'>06:00:01</var> GMT+0</small><br><strong>Identified</strong> - Maintenance is now in progress.</p> <p><small>Jan <var data-var='date'> 19</var>, <var data-var='time'>06:30:00</var> GMT+0</small><br><strong>Completed</strong> - Maintenance has completed successfully.</p> <p><small>Jan <var data-var='date'> 19</var>, <var data-var='time'>06:00:00</var> GMT+0</small><br><strong>Identified</strong> - 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..</p> ]]> Mon, 19 Jan 2026 06:00:00 +0000 https://status.checkmk.cloud/maintenance/cmk3qcegt04sj1yolxiybxuwp https://status.checkmk.cloud/maintenance/cmk3qcegt04sj1yolxiybxuwp License activation is temporarily impaired Type: Incident 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. Type: Incident

Duration: 6 hours and 37 minutes

Affected Components:

<p><small>Dec <var data-var='date'> 16</var>, <var data-var='time'>10:33:07</var> GMT+0</small><br><strong>Identified</strong> - 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..</p> <p><small>Dec <var data-var='date'> 16</var>, <var data-var='time'>09:00:00</var> GMT+0</small><br><strong>Investigating</strong> - 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..</p> <p><small>Dec <var data-var='date'> 16</var>, <var data-var='time'>15:36:36</var> GMT+0</small><br><strong>Resolved</strong> - This incident has been resolved..</p> ]]> Tue, 16 Dec 2025 09:00:00 +0000 https://status.checkmk.cloud/incident/cmj8hco6b01peane7plrl56nv https://status.checkmk.cloud/incident/cmj8hco6b01peane7plrl56nv Scheduled system maintenance to enhance system performance, reliability, and security of Checkmk Cloud Type: Maintenance 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. Type: Maintenance

Duration: 2 hours and 29 minutes

Affected Components: , ,

<p><small>Dec <var data-var='date'> 1</var>, <var data-var='time'>06:00:01</var> GMT+0</small><br><strong>Identified</strong> - Maintenance is now in progress.</p> <p><small>Dec <var data-var='date'> 1</var>, <var data-var='time'>08:29:29</var> GMT+0</small><br><strong>Completed</strong> - Maintenance has completed successfully..</p> <p><small>Dec <var data-var='date'> 1</var>, <var data-var='time'>06:00:00</var> GMT+0</small><br><strong>Identified</strong> - 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..</p> ]]> Mon, 1 Dec 2025 06:00:00 +0000 https://status.checkmk.cloud/maintenance/cmicwhozg002twleq7d1j3w2l https://status.checkmk.cloud/maintenance/cmicwhozg002twleq7d1j3w2l We are investigating authentication issues with Checkmk SaaS Sites Type: Incident 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. Type: Incident

Duration: 41 minutes

Affected Components: ,

<p><small>Nov <var data-var='date'> 13</var>, <var data-var='time'>08:31:27</var> GMT+0</small><br><strong>Investigating</strong> - We are currently investigating this incident..</p> <p><small>Nov <var data-var='date'> 13</var>, <var data-var='time'>09:05:42</var> GMT+0</small><br><strong>Monitoring</strong> - We implemented a fix and are currently monitoring the result..</p> <p><small>Nov <var data-var='date'> 13</var>, <var data-var='time'>09:12:29</var> GMT+0</small><br><strong>Resolved</strong> - This incident has been resolved..</p> ]]> Thu, 13 Nov 2025 08:31:27 +0000 https://status.checkmk.cloud/incident/cmhx66s6z05dj74v568k400kz https://status.checkmk.cloud/incident/cmhx66s6z05dj74v568k400kz System maintenance Type: Maintenance 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 Type: Maintenance

Duration: 1 day and 21 hours

Affected Components:

<p><small>Oct <var data-var='date'> 31</var>, <var data-var='time'>15:00:00</var> GMT+0</small><br><strong>Identified</strong> - During this period, license activation and creating new licensed sites will be unavailable. Service will be fully restored once maintenance is completed..</p> <p><small>Oct <var data-var='date'> 31</var>, <var data-var='time'>15:00:01</var> GMT+0</small><br><strong>Identified</strong> - Maintenance is now in progress.</p> <p><small>Nov <var data-var='date'> 2</var>, <var data-var='time'>12:00:00</var> GMT+0</small><br><strong>Completed</strong> - Maintenance has completed successfully.</p> ]]> Fri, 31 Oct 2025 15:00:00 +0000 https://status.checkmk.cloud/maintenance/cmh3iyxq2003kms0s0peueg4x https://status.checkmk.cloud/maintenance/cmh3iyxq2003kms0s0peueg4x Checkmk sites cannot be created in the US Type: Incident 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. Type: Incident

Duration: 10 hours and 19 minutes

Affected Components:

<p><small>Oct <var data-var='date'> 20</var>, <var data-var='time'>10:27:44</var> GMT+0</small><br><strong>Identified</strong> - 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..</p> <p><small>Oct <var data-var='date'> 20</var>, <var data-var='time'>11:46:18</var> GMT+0</small><br><strong>Monitoring</strong> - Most impacted AWS operations are recovering, we are monitoring the process..</p> <p><small>Oct <var data-var='date'> 20</var>, <var data-var='time'>13:41:29</var> GMT+0</small><br><strong>Monitoring</strong> - All email notifications have been re-queued, checkmk site creation is still in the process of recovering..</p> <p><small>Oct <var data-var='date'> 20</var>, <var data-var='time'>16:52:37</var> GMT+0</small><br><strong>Monitoring</strong> - Email notifications for Checkmk sites hosted in the US have started to experience issues. We are monitoring the developments closely..</p> <p><small>Oct <var data-var='date'> 20</var>, <var data-var='time'>19:30:21</var> GMT+0</small><br><strong>Monitoring</strong> - Email notifications are fully recovered, however the creation of new Checkmk sites in the US region is still impaired..</p> <p><small>Oct <var data-var='date'> 20</var>, <var data-var='time'>20:46:47</var> GMT+0</small><br><strong>Resolved</strong> - This incident has been resolved. Dependent AWS services have fully recovered..</p> ]]> Mon, 20 Oct 2025 10:27:44 +0000 https://status.checkmk.cloud/incident/cmgyzrv9201vfmnf2vjh4qb62 https://status.checkmk.cloud/incident/cmgyzrv9201vfmnf2vjh4qb62 Upgrade to Admin Panel Email Gateway Type: Maintenance 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 Type: Maintenance

Duration: 2 hours

Affected Components:

<p><small>Oct <var data-var='date'> 14</var>, <var data-var='time'>05:00:00</var> GMT+0</small><br><strong>Identified</strong> - 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..</p> <p><small>Oct <var data-var='date'> 14</var>, <var data-var='time'>05:00:01</var> GMT+0</small><br><strong>Identified</strong> - Maintenance is now in progress.</p> <p><small>Oct <var data-var='date'> 14</var>, <var data-var='time'>07:00:00</var> GMT+0</small><br><strong>Completed</strong> - Maintenance is now in progress.</p> ]]> Tue, 14 Oct 2025 05:00:00 +0000 https://status.checkmk.cloud/maintenance/cmg6c517500sq12uaccykr7q3 https://status.checkmk.cloud/maintenance/cmg6c517500sq12uaccykr7q3 Admin Panel maintenance Type: Maintenance 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 Type: Maintenance

Duration: 15 minutes

Affected Components:

<p><small>Jul <var data-var='date'> 17</var>, <var data-var='time'>07:30:01</var> GMT+0</small><br><strong>Identified</strong> - Maintenance is now in progress.</p> <p><small>Jul <var data-var='date'> 17</var>, <var data-var='time'>07:30:00</var> GMT+0</small><br><strong>Identified</strong> - 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..</p> <p><small>Jul <var data-var='date'> 17</var>, <var data-var='time'>07:45:00</var> GMT+0</small><br><strong>Completed</strong> - Maintenance has completed successfully.</p> ]]> Thu, 17 Jul 2025 07:30:00 +0000 https://status.checkmk.cloud/maintenance/cmd726i0q03hl10pbirokw38c https://status.checkmk.cloud/maintenance/cmd726i0q03hl10pbirokw38c Scheduled System Maintenance Type: Maintenance 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 Type: Maintenance

Duration: 2 hours and 33 minutes

Affected Components: , ,

<p><small>Jun <var data-var='date'> 18</var>, <var data-var='time'>07:33:12</var> GMT+0</small><br><strong>Completed</strong> - Maintenance has completed successfully..</p> <p><small>Jun <var data-var='date'> 18</var>, <var data-var='time'>05:00:00</var> GMT+0</small><br><strong>Identified</strong> - 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..</p> <p><small>Jun <var data-var='date'> 18</var>, <var data-var='time'>05:00:01</var> GMT+0</small><br><strong>Identified</strong> - Maintenance is now in progress.</p> ]]> Wed, 18 Jun 2025 05:00:00 +0000 https://status.checkmk.cloud/maintenance/cmbj7jdy0000ggdbswph4t6u3 https://status.checkmk.cloud/maintenance/cmbj7jdy0000ggdbswph4t6u3 Maintenance of Control and Application planes Type: Maintenance 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 Type: Maintenance

Duration: 38 minutes

Affected Components: ,

<p><small>May <var data-var='date'> 15</var>, <var data-var='time'>06:38:18</var> GMT+0</small><br><strong>Completed</strong> - Maintenance has been finished..</p> <p><small>May <var data-var='date'> 15</var>, <var data-var='time'>06:00:00</var> GMT+0</small><br><strong>Identified</strong> - We are planning a migration of AWS AMI which will end support soon and implement changes on network level. .</p> <p><small>May <var data-var='date'> 15</var>, <var data-var='time'>06:00:01</var> GMT+0</small><br><strong>Identified</strong> - Maintenance is now in progress.</p> ]]> Thu, 15 May 2025 06:00:00 +0000 https://status.checkmk.cloud/maintenance/cmaml7znd000gtnbzcktspm2x https://status.checkmk.cloud/maintenance/cmaml7znd000gtnbzcktspm2x