Checking availability of Launchpad frontends

Launchpad is using round-robin DNS to load balance requests among the frontends.

So in order to check the availability of the frontends, you need to get a list of all frontends and then check them individually.

Get list of frontends

$ host has address has address has IPv6 address 2620:2d:4000:1001::8003 has IPv6 address 2620:2d:4000:1001::8004 mail is handled by 10

Check individual frontend

$ curl --resolve

More infos on using curl.