Salt Mining and exporting

_modules haproxy.py

## This example module allows for generating and collecting haproxy node lines
## (Be sure to sync_modules when installing or changing modules)
##
## To add a server to a pool use haproxy.setup_node: 
#$ salt '<minion target>' haproxy.setup_node <pool_name> [port]
## This sets a targeting grain and exports the haproxy line
##
## To collect the host lines on the loadbalancer use haproxy.get_servers
#$ salt '<haproxy host>' haproxy.get_output <pool_name>
## This module is best used when called by a file.managed resource
## managing /etc/haproxy/haproxy.cfg

def setup_node(proxy_pool, port=8080):
    '''Set identifying grain and mine.send the HAproxy server line'''
    __salt__['grains.setval']('haproxy_%s' % proxy_pool, 'enabled')
    __salt__['mine.send']('haproxy.server_line')
    line = server_line(port=port)
    return line

def server_line(port=8080):
    eth0_ip = __salt__['network.ip_addrs']('eth0')[0]
    hostname = __salt__['cmd.run']('hostname')
    line = 'server %s %s:%d cookie %s check' % (hostname, eth0_ip, port, hostname)
    return line

def get_servers(proxy_pool):
    '''Get concatenated mine output from minions with matching grains.'''
    # Get previously 'mine.send'ed haproxy_config_line from target minions
    out = __salt__['mine.get']('haproxy_%s:enabled' % proxy_pool, 'haproxy.server_line', 'grain')
    ret = [] 
    for host in out:
            ret.append(out[host])
    return ret

haproxy collect.sls

/tmp/collect_file_test:
  file.managed:
    - source: salt://haproxy/output.txt
    - template: jinja

haproxy output.txt

{% for line in salt['haproxy.get_output']('haproxy_stats:enabled','haproxy.server_line') -%}
{{ line.strip() }}
{% endfor -%}