>> 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. -- Atentamente Héctor Rivas -- 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.
