Reported Outages

Launch issues at CHI@TACC

Resolved Posted by Francois Halbach on September 02, 2021
Outage start Thursday, September 02, 2021 12:30 p.m.
Expected end Friday, September 03, 2021 12:30 p.m.

Update: The issue has been resolved.

CHI@TACC is experiencing launch issues for new instances since today at 12:30 PM. We are investigating and will provide an update once functionality is restored. CHI@UC is still available at https://chi.uc.chameleoncloud.org.

KVM@TACC Urgent Outage 26 Aug 2021

Resolved Posted by Cody Hammock on August 26, 2021
Outage start Thursday, August 26, 2021 2 p.m.
Expected end Thursday, August 26, 2021 3:33 p.m.

Update: Maintenance is complete

In order to address recent stability concerns on KVM@TACC, maintenance will be performed today, August 26, 2021, from 2:00PM (CDT) to 4:00PM (CDT). During this time all instances will continue to run, but will be inaccessbile until the work is complete.

TACC Emergency Network Outage 24 August 2021

Resolved Posted by Cody Hammock on August 24, 2021
Outage start Tuesday, August 24, 2021 6 p.m.
Expected end Tuesday, August 24, 2021 7 p.m.

Update: The maintenance was completed on schedule.

An emergency network outage at TACC has been scheduled for this afternoon, Tuesday, August 24th, from 6:00PM (CDT) to 7:00PM (CDT). Systems will be inaccessible during this time, but running instances will not be impacted. CHI@UC and Jupyter will not be affected.

Ticket system outage

Resolved Posted by Cody Hammock on August 24, 2021
Outage start Tuesday, August 24, 2021 10 a.m.
Expected end Tuesday, August 24, 2021 1:46 p.m.

Update: Maintenance is complete.

TACC will be conducting maintenance and upgrade on the ticketing system today from approximately 10:00AM to 5:00PM (CDT). During this time tickets submission and accessing tickets from the Chameleon portal will be unavailable.

Outage at CHI@UC 2021-08-06

Resolved Posted by Jason Anderson on August 06, 2021
Outage start Friday, August 06, 2021 9:15 a.m.
Expected end Friday, August 06, 2021 10:15 a.m.

We are experiencing an unplanned outage of the CHI@UC site and the JupyterHub environment. We're working to figure out what's up and to restore service asap.

JupyterHub maintenance outage on 2021-08-12

Resolved Posted by Mark Powers on August 03, 2021
Outage start Thursday, August 12, 2021 12 p.m.
Expected end Thursday, August 12, 2021 3 p.m.

Update: The maintenance is complete. Please log out before using jupyterhub before returning to work


There will be an outage for JupyterHub on Thursday, August 12 starting at noon expected to take 3 hours for minor updates.

Power Maintenance at CHI@UC July 19, 2021

Resolved Posted by Michael Sherman on July 12, 2021
Outage start Sunday, July 18, 2021 9:10 p.m.
Expected end Tuesday, July 20, 2021 7:13 p.m.

UPDATE: We've cleared the issues with power management and the CHI@UC site should be stablized. Please file help desk tickets if your individual instance is having trouble coming back online.


There will be a total outage for the CHI@UC site on Monday, July 19th, due to maintenance on the power system in the data center.

In addition, JupyterHub and Trovi will not be available.

Stiching outage for CHI@UC 06/30/2021

Resolved Posted by Michael Sherman on June 30, 2021
Outage start Wednesday, June 30, 2021 11:08 a.m.
Expected end Thursday, July 01, 2021 7:16 p.m.

Update: Service is restored. If you continue to see issues, please let us know via the helpdesk.


The Network Stitching feature on CHI@UC is currently non-functional.

No traffic will flow over stitched links, either new or pre-existing.  This will impact any experiment on CHI@UC that uses them.

It is caused by an upstream issue, namely a network outage at ANL affecting Chameleon-EXOGENI vlans 3290-3299.

KVM@TACC Unavailable May 3, 2021

Resolved Posted by Cody Hammock on May 03, 2021
Outage start Monday, May 03, 2021 8 a.m.
Expected end Monday, May 03, 2021 12 p.m.

Update: Service is restored. If you continue to see issues, please let us know via the helpdesk.

Starting in the morning of May 3, 2021 services and instanaces on KVM@TACC has been sporadically unavailable. Staff is working to restore access.

Launch and lease creation issues at CHI@TACC

Resolved Posted by Francois Halbach on April 27, 2021
Outage start Monday, April 26, 2021 6 p.m.
Expected end Tuesday, April 27, 2021 6 p.m.

Resolved: This outage has been resolved.

CHI@TACC is experiencing launch and lease creation issues for new instances since April 26th. We are investigating and will provide an update once functionality is restored. CHI@UC is still available at https://chi.uc.chameleoncloud.org.