[chef] Setting up hosts between multiple boxes on EC2

["Luis Correa d'Almeida" < >]

Let's say I provision two boxes on EC2: db1 and app1

What's the best way to make each box aware of the other? I need to
tell app1 the IP/host/FQDN of the db1 machine so it can connect to it.

One option is to use hosts in the config files - for example, in the
app1 box the config references a host (db1) that I can set up either
in the hosts file or in the local DNS. But I still wouldn't know the
IP of db1 to populate the hosts file with when running chef. At this
point, I need to change my data-bags once I find out the address of
db1 and then provision app1, running a recipe that adds the right
entry to the hosts file with the newly found db1 IP.

Just wondering if there is a better way.

Thanks,

Luis