bast3001.wikimedia.org
bast4001.wikimedia.org
prometheus1001.eqiad.wmnet
prometheus1002.eqiad.wmnet

All four of these fail all puppet-compiler runs, even for no-op patches.

The error message is typically something along these lines:

Error: Failed to parse template prometheus/cluster_config.erb:

Filepath: /usr/lib/ruby/2.1.0/net/http.rb
Line: 879
Detail: getaddrinfo: Name or service not known

at /mnt/jenkins-workspace/puppet-compiler/5369/change/src/modules/prometheus/manifests/cluster_config.pp:44 on node bast3001.wikimedia.org