informer.py

"""
This enables us to call the minions and search for a specific role
"""

import logging
import salt.utils

log = logging.getLogger(__name__)

def all_by_roles(*args, **kwards):
  """
  Get all the hosts by their roles
  """
  ret = {}
  nodes = __salt__['publish.publish']('*', 'grains.item', 'role')
  for name, found_role in nodes.items():
    log.info("found {0} {1}".format(name, found_role['role']))
    node = __salt__['publish.publish'](name, *args, **kwards)
    if node:
      for _, value in node.items():
        if found_role['role'] == 'master':
          role = 'saltmaster'
        else:
          role = found_role['role']
        ip = value.pop()
        log.info("Informer found: [{0}] = {1}".format(role, ip))
        ret[role] = ip

  return ret
  

init.sls

{% for name, ip in salt['informer.all_by_roles']('network.ip_addrs','eth1').items() %}
{{ name }}_host:
  host.present:
    - ip: {{ ip }}
    - name: {{ name }}
{% endfor %}