Portal:Data Services/Admin/Dumps

The clouddumps servers serve dumps clients to Cloud VPS and the internet.

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. The dumps_dist_active_web and profile::dumps::distribution::web::is_primary_server hiera variables need to match the main DNS entry.
rsync: Mirrors have rsync access to the dumps shares. They use the dumps.wikimedia.org service name.

To failover the web/rsync server to the other node you need to:

Update the dumps.wikimedia.org CNAME to point to the other server
Update Hiera data:
- Update dumps_dist_active_web Hiera variable to point to the other server
- Update profile::dumps::distribution::web::is_primary_server to false on the old server and to true on the new one
Wait for DNS TTL to expire (which should be longer than a full Puppet cycle)

To failover the Cloud VPS NFS server to the other node you need to: