On Monday, January 28, 2013 6:30:14 PM UTC-8, Dusty Doris wrote:
>
> I'd like to be able to collect all the hostnames (fqdn) or ips of certain
> hosts to be used in setting up firewall rules. I'd like to search for
> hosts that have included a particular class, perhaps by simply setting a
> tag when that resource is included.
>
> eg:
>
> node 'node1' {
> include 'somewebclass'
> }
>
> class somewebclass {
> tag 'web'
> # other stuff
> }
>
>
> Then in another class, I'd like to find all my 'web' hosts and allow them
> access in a firewall rule.
> eg:
>
> class somedbclass {
> tag 'db'
> iptables { "allow db access":
> proto => 'tcp',
> dport => '3306'
> source => Node <| tag == 'web' |>,
> jump => 'ACCEPT'
> }
> }
>
> So, ultimately, I'd need that Node <| tag == 'web' |> to be an array of
> hostnames or ipaddresses.
>
> This is just an example to try to explain what I am doing. Does anyone
> know how to do this? Can I do this in puppet? Do I need to write my own
> function to handle this? Or, can I use something like hiera or puppetdb to
> do this?
>
> Thanks for any tips.
>
>
>
>
> This should work for you. I didn't test it but it should be close to what
you need. The basic idea is have the node who already knows it's IP address
to export a iptables resource, then have the server collect the resources.
I like to break these sorts of things into a class that I can just include
into all my web nodes.
class db::client {
@@iptables { "Allow db access to ${::hostname}":
proto => 'tcp',
dport => '3306'
source => $::ipaddress,
jump => 'ACCEPT',
tag
}
}
class db::server {
Iptables <<| tag == 'db::client' |>>
node webclient {
include db::client
# web stuff
}
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