2010/9/30 Héctor Rivas Gándara <key...@gmail.com>: >>> We have simple inheritance in our external node classifier like this: >>> We only allow one level, and includes cannot include other includes. >>> Parameters specified in a node yaml override the same parameter in an >>> include yaml. >>> Oh, and we have a default node that all of this is appended to. >>> This is a really simple classifier, less than 100 lines of real code. >> >> I will try to do something like that. > > I've just made a small python script that implements a simple external > node manager with inheritance support. > > http://gist.github.com/604530 > > It allows define "includes" to other nodes/definitions in yaml by > adding classes named "external:<name>" or adding a new attribute > "include". It resolves references to other parameters using the sintax > "%{parameter_name}". > > This way you can use something like: > > - name: server > parameters: > guest_group: "guests" > classes: > - generic_server > > - name: linux > parameters: > connect_allowed_groups: [ "group1", "group2" ] > classes: > - external:server > > - name: node1.mydomain.com > parameters: > connect_allowed_groups: [ "%{connect_allowed_groups}", "group3"] > classes: > - dbserver > - external:linux > > - name: node2.mydomain.com > parameters: > connect_allowed_groups: ["group1","group3", "%{guest_group}"] > include: > - linux > classes: > - webserver > > And this is exactly what I was needing. > > $ ./simple-node-classifier.py node2.mydomain.com > --- > classes: [webserver, generic_server] > include: [linux] > name: node2.mydomain.com > parameters: > connect_allowed_groups: [group1, group3, guests] > guest_group: guests > > $ ./simple-node-classifier.py node1.mydomain.com > --- > classes: [generic_server, dbserver] > include: [linux] > name: node1.mydomain.com > parameters: > connect_allowed_groups: [group1, group2, group3] > guest_group: guests > > > > Right now it reads from a plain YAML file, but I will add code to > allow delegate the node queries to other external command. This will > allow add inheritance support to other external nodes implementations > easily. > > Actually, I will use plain YAML files for a time. I think that is easy > to manage and convenient to have all this configuration in a yaml > file. And I can add it to a CVS repository. Later import it to other > system (like dashboard) would be easy. > > In fact, I recomend all new users to start working with plain YAML > files and a script like this one as external node classifier.
Absolutely. It's really easy to write a node classifier. You can pick any language you want, you can do it however you want, you just need to supply appropriate output. Nice work on the array appending solution you came up with. -- You received this message because you are subscribed to the Google Groups "Puppet Users" group. To post to this group, send email to puppet-us...@googlegroups.com. To unsubscribe from this group, send email to puppet-users+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/puppet-users?hl=en.
