Reported Outages

Update 10/20/2025:

The remaining maintenance for composable hardware has now been completed.

Update 10/02/2025:

KVM@TACC and CHI@Edge are now back to normal.
CHI@TACC is back to normal, exept for the following:

• A subset of baremetal nodes that lost network configuration
• Composable hardware (Liqid and GigaIO) cannot reach their attached GPUs, pending a restart of these nodes and their shared PCIe backplane.

Thank you for your patience as we restore these!
 

Chameleon Jupyterhub is unavailable.

As of the morning of September 16th, the switch has had another issue, and is no longer passing traffic. Staff are investigating, but we do not have an ETA yet.

This is now resolved.

For those interested in the details, see https://github.com/projectcalico/calico/issues/9622

CHI@Edge containers are currently failing to send any network traffic. This is due to an unanticipated edge case during routine maintenance breaking breaking updates to the calico network database.

On the morning of July 22, we'll be upgrading the infrastructure hosting trovi. During this time, you will not be able to upload, edit, or launch trovi artifacts. Running Jupyter servers will not be affected.

All functionality should be restored. Please contact the help desk if you encounter any issues.

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On Monday, July 21 we will be upgrading out authentication server. As a result, login to all Chameleon web services will be down, including portal, Jupyter, and horizon. Network connections to running instances will not be affected. We expect the interruption to last 5 minutes.

It appears that early morning on Saturday, container launches on CHI@Edge began timing out. We are currently investigating the cause, and will update here.

Update June 10th: The datacenter maintenance has concluded, and CHI@NCAR is back online.

Tonight, from 6pm - 10pm US Central time, network maintenance at ANL will cause rolling outages impacting access to CHI@UC, Trovi, and to Authentication services for all Chameleon sites.

We expect the interruptions to be in the range of minutes to <= 1 hour, sometime during this window.

Connections (e.g. over ssh) to instances that are already running at other sites will not be affected, but you may observe interuptions in the ability to launch new instances due to the authentication outage.

Resolved: 7:00 pm Monday:

Reservations are workign again, and tests to launch a container and access it via floating IP are succeeding, implying that the network underlay is also healthy once again.

Please let us know if you continue to observe issues.