set_puppet.py

#!/usr/bin/env python
import getpass
import requests
import sys

url = 'https://foreman/api'
verify = False
try:
    username = sys.argv[1]
except IndexError:
    username = getpass.getuser()
password = getpass.getpass()
auth = (username, password)

smart_proxy_name = 'my_proxy'

# Find the smart proxy ID
r = requests.get(url + '/smart_proxies', auth=auth, verify=False)
for smart_proxy in r.json():
    if smart_proxy['smart_proxy']['name'] == smart_proxy_name:
        put_params = {
                'host[puppet_ca_proxy_id]': smart_proxy['smart_proxy']['id'],
                'host[puppet_proxy_id]': smart_proxy['smart_proxy']['id'],
        }
        break
else:
    print 'Could not find ' + smart_proxy_name
    sys.exit(1)

search_params = {'search': 'not has puppetmaster', 'per_page': 400}
r = requests.get(url + '/hosts', params=search_params, auth=auth,
        verify=verify)

for host in r.json():
    requests.put('%s/hosts/%s' % (url, host['host']['id']), params=put_params,
            auth=auth, verify=verify)