I have just added a new VC to my vcops, but then it shows unable to connect to VC.
Looking at the collector.log , /data/vcops/log "name or service not known" was thrown.
Any idea?
Where did you add the vCenter?
I suggest you add it through the admin portal instead of using the Custom UI. you can test connection with the credentials before adding it so you know if the credentials you are using is right.
Its in the admin portal, and the connections checks out through the Test it provides
Please paste the log snippet for further investigation