Portal:Data Services/Admin/Dumps

The clouddumps servers serve dumps to clients running in Cloud VPS and the internet. See also Dumps/Dump servers.

Interfaces

Cloud VPS NFS: Some Cloud VPS instances mount NFS shares from all clouddumps servers. The dumps_dist_active_vps hiera variable controls the symlinks in /public/dumps which clients are meant to use.
Production NFS: Some wikiprod hosts (e.g. stat*) mount dumps as NFS shares. Again these mount both hosts, but confusingly the dumps_dist_active_web hiera variable is used to control the user-facing symlinks.
Web: Clients on the internet can download dumps via the web server, which is accessed via the dumps.wikimedia.org service name (which points to the dumps LVS service).
rsync: Mirrors have rsync access to the dumps shares. They use the dumps-rsync.wikimedia.org service name,^[1] which points to the dumps LVS service.

The web and rsync servers are load-balanced via LVS and the pool status can be managed via conftool.

To failover an NFS server to the other node you need to:

Update the dumps_dist_active_vps or dumps_dist_active_web Hiera variable (depending on which server you are failing over)
Wait for a full Puppet cycle or two for most VMs to pick it up