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--- production:shaman.ceph.com [2021/06/15 14:44] – djgalloway
+++ production:shaman.ceph.com [2023/04/06 00:51] (current) – [Summary] dmick
@@ Line 4: / Line 4: @@
 There are three VMs in the [[https://wiki.sepia.ceph.com/doku.php?id=services:ovh#production_services|OVH CI region]] that make up shaman.
-  * shaman.ceph.com is just a load balancing VM
+  * shaman.ceph.com is just a load balancing VM.  Accesses are proxied to either 1.shaman.ceph.com or 2.shaman.ceph.com with an 'upstream shaman' clause in /etc/nginx/nginx.conf, which is then referred to by the site config for shaman.ceph.com.
   * 1.shaman.ceph.com is the primary shaman node that has the postgres DB with all the repo information
   * 2.shaman.ceph.com is a **READ ONLY** backup in the event 1.shaman.ceph.com goes down
+  * 2.shaman.ceph.com can handle write requests because pecan, the web framework, is also aware of the primary/hot standby configuration, and so will redirect writes to 1.shaman.ceph.com on its own, if they appear.
 ===== User Access =====