87 lines
3.1 KiB
Python
Executable File
87 lines
3.1 KiB
Python
Executable File
#!/usr/bin/env python
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import sys
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import json
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import requests
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from optparse import OptionParser
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HELP_DESCRIPTION = '''
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This queries Consul for all available hosts and outputs them in the Ansible
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inventory format, which is JSON with specific keys.
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Assumes existence of Ansible certificate files.
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https://docs.ansible.com/ansible/latest/dev_guide/developing_inventory.html
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'''.strip()
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HELP_EXAMPLE = '''
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Example: ./allhosts.py -l debug -u https://consul.example.org:8400
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'''
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def parse_opts():
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parser = OptionParser(description=HELP_DESCRIPTION, epilog=HELP_EXAMPLE)
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# WARNING: The --list flag is mandatory for use with Ansible. We ignore it.
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parser.add_option('-l', '--list', action='store_true',
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help='Mandatory flag for Ansible. Ignored.')
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parser.add_option('-d', '--hosts-domain', default='statusim.net',
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help='Domain to append to hostnames.')
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parser.add_option('-u', '--consul-url', default='https://consul.statusim.net:8400',
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help='Name of virtual network interface.')
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parser.add_option('-c', '--cert-chain', default='ansible/files/consul-ca.crt',
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help='Path to Consul certificate CA chain.')
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parser.add_option('-p', '--cert-path', default='ansible/files/consul-client.crt',
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help='Path to Consul certificate file')
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parser.add_option('-k', '--cert-key', default='ansible/files/consul-client.key',
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help='Path to Consul certificate key file')
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return parser.parse_args()
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def main():
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(opts, args) = parse_opts()
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data_centers = requests.get(
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'%s/v1/catalog/datacenters' % opts.consul_url,
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cert=(opts.cert_path, opts.cert_key),
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verify=opts.cert_chain,
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).json()
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nodes = []
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for dc in data_centers:
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nodes.extend(requests.get(
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'%s/v1/catalog/nodes?dc=%s' % (opts.consul_url,dc),
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cert=(opts.cert_path, opts.cert_key),
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verify=opts.cert_chain,
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).json())
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# JSON for Ansible
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out = {'_meta':{'hostvars':{}}}
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for node in nodes:
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if node['Meta'] is None:
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print('No Node Meta for host: %s' % node['Node'], file=sys.stderr)
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continue
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out['_meta']['hostvars'][node['Node']] = {
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"dns_entry": '%s.%s' % (node['Node'], opts.hosts_domain),
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"hostname": node['Node'],
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"ansible_host": node['Address'],
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"data_center": node['Datacenter'],
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"env": node['Meta']['env'],
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"stage": node['Meta']['stage'],
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}
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dc_group = out.setdefault(
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node['Datacenter'],
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{'children': [], 'hosts': [], 'vars': {} },
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)
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dc_group['hosts'].append(node['Node'])
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fleet_group = out.setdefault(
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'%s.%s' % (node['Meta']['env'],node['Meta']['stage']),
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{'children': [], 'hosts': [], 'vars': {} },
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)
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fleet_group['hosts'].append(node['Node'])
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out['all'] = { 'hosts': [node['Node'] for node in nodes] }
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print(json.dumps(out, indent=2))
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if __name__ == '__main__':
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main()
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