I had upgraded to NLS 1.4 on our 2 node cluster, which seemed to go smoothly no errors that I could see. After the upgrade I can get the NLS login page and log in but right after login, I get a 404 error "The requested URL /nagioslogserver/login was not found on this server" .
I did find that I was low on disk space (using 87%) and the indexes on both servers remained in the yellow state. I have resolved that issue by extending the LVM and now all the indexes show green when I run
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curl 'localhost:9200/_cluster/health?level=indices&pretty'Thanks,
gtolson