Chef Recipe to set hostname of an EC2 instance AWS

Question

I want to write a chef recipe that will set the hostname of the EC2 instance as :

AWSRegionInstanceTyperandomNo

like awsedev001

how can I do this in a chef recipe? Do we have any recipe for that ?

Please help

Answer 1

How would you do this in regular Unix land?

You would first add the full FQDN to /etc/hostname for persistence:

file '/etc/hostname' do
  content 'hostname.example.com'
end

Then you would set the hostname for the currently running os:

execute 'hostname hostname.example.com' do
  not_if 'hostname -eq "hostname.example.com"'
end

---

This is a simple Chef recipe example, but it can be made more complex to suit your needs. You may also want to look at the hostname cookbook on the Chef community site .

Answer 2

In AWS in order to change the hostname you need to edit

/etc/sysconfig/network

NETWORKING=yes
HOSTNAME=ip-172-16-1-23.ec2.internal
NOZEROCONF=yes

After editing the second line you can reboot and you are set.

Answer 3

You can use the https://supermarket.chef.io/cookbooks/chef_hostname cookbook off of the community site.

In your cookbook metadata.rb just declare:

depends "chef_hostname"

And then in your recipe code use the hostname resource to set the hostname:

hostname "foo.example.com"

Or:

hostname node.name