* Add feature flag to enable discovery and use of public IPaddr for clustering.
Before this change, Alertmanager would refuse to startup if using a
advertise address binding to any address (0.0.0.0), and the host only
had an interface with a public IP address. After this change we feature
flag permitting the use of a discovered public address for cluster
gossiping.
Signed-off-by: Devin Trejo <dtrejo@palantir.com>
The memberlist library fails when it can't find a private address and no
advertise address is given. To return a helpful message to the user,
AlertManager mimics the logic from memberlist. However the code had a
bug that swallowed the error message and made it difficult for the user
to understand how to fix the problem.
Signed-off-by: Simon Pasquier <spasquie@redhat.com>
Devin Trejo
Simon Pasquier