Performed a UCP upgrade from 3.0.8 to 3.1.3 and the upgrade completed. After the upgrade I logged back into the dashboard and the graphs were not showing. The page would show a spinning circle and then eventually an error saying “load failed” would appear where graphs would normally be shown.
I left the cluster in this state and was going to open a ticket the next morning to resolve the graph issues but during the night all my manager nodes spiked the CPU to 100% and my cluster crashed. All my containers in my swarm stopped.
I ended up having to downgrade my UCP back to UCP 3.0.8 as even after reboots of all nodes with UCP 3.1.3 did not restore the cluster to a healthy state.
After the downgrade back to UCP 3.0.8 all services are now working properly again.
Anyone else running into issues with UCP 3.1.3 on CentOS 7?