I have just upgraded my cluster and nodes to v1.7.12 and recreated all pods successfully except for my nginx pod which keeps on failing with the error:
nginx 2018-02-17T08:38:07.965745644Z nginx: [emerg] host not found in upstream "gunicorn" in /etc/nginx/conf.d/web.conf:8
nginx 2018-02-17T08:38:07.965678149Z 2018/02/17 08:enter code here38:07 [emerg] 1#1: host not found in upstream "gunicorn" in /etc/nginx/conf.d/web.conf:8
The idea is that my nginx pod reverse proxies to my gunicorn pods which was working prior to the cluster upgrade.
I have very limited understanding of kubernetes as I wasn't the one who configured the infrastructure.
My suspicion is I am missing a configuration when the cluster and nodes were upgraded but I don't know what.
Can anyone point me to the right direction?
