I did an upgrade this morning to my system and had the etcd error after the upgrade.
I looked through posts on this site and saw the post “Upgrade of Graylog appliance (omnibus) failed etcd issue”.
"Hi,
technically the upgrade of etcd should work out of the box. The errors in your logs could indicate a corrupted etcd database long before the upgrade. Maybe the disk ran out of space or something different.
If this is a single server setup you can delete the etcd data directory and start it from scratch:
sudo graylog-ctl stop etcd
cd /var/opt/graylog/data/etcd/
sudo rm -r *
sudo graylog-ctl start etcd
sudo graylog-ctl reconfigure
If you are running a cluster you have to repeate the set-cluster-master and refonfigure-as- steps.
Hope that helps!
Marius."
This post mentioned to delete the data in the etcd directory and that this would resolve that issue.
Later in the post someone mentioned that after doing this they lost their nginx config.
"I did the this update as well and it was a bit of a train wreck.
Deleting the ETCD files fixed my ETCD service down issue.
It also stopped a few thousand log entries a minute being logged.
Now I need to get NGINX set back up as all of it’s configuration appears to have disappeared.
At least I can log in via port 9000, but no SSL yet.
This is more of a bump then anything else so the developers hopefully see this post.
Thanks,
Keith"
Before I do the upgrade again I just wanted to check if I will loose any of my configs by deleting the files in the directory listed