I still have access to the Opscenter pages but no more nodes appears to be on the cluster.
A nodetool ring gives:
Address Rack Status State Load Owns Token
192.168.100.201 rack1 Up Normal 74,77 GB 100,00% 0
But there is no way to see this node on Opscenter 2.1.2 (0 of 0 agents connected)
I have the following warning in Opscenter logs:
WARN: Unable to find a matching cluster for [u'0:0:0:0:0:0:0:1%1', u'192.168.100.201', u'fe80:0:0:0:ca60:ff:fe9b:56c6%2', u'127.0.0.1'].
But I didn't change any address or port on cassandra.yaml AFAIK.
Any idea on what could be responsible of such a disappearance or how to debug this?