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#!/usr/bin/env python
"""
This is an Ansible dynamic inventory for OpenStack.
It requires your OpenStack credentials to be set in clouds.yaml or your shell
environment.
"""
from __future__ import print_function
from collections import Mapping
import json
import shade
def base_openshift_inventory(cluster_hosts):
'''Set the base openshift inventory.'''
inventory = {}
masters = [server.name for server in cluster_hosts
if server.metadata['host-type'] == 'master']
etcd = [server.name for server in cluster_hosts
if server.metadata['host-type'] == 'etcd']
if not etcd:
etcd = masters
infra_hosts = [server.name for server in cluster_hosts
if server.metadata['host-type'] == 'node' and
server.metadata['sub-host-type'] == 'infra']
app = [server.name for server in cluster_hosts
if server.metadata['host-type'] == 'node' and
server.metadata['sub-host-type'] == 'app']
cns = [server.name for server in cluster_hosts
if server.metadata['host-type'] == 'cns']
nodes = list(set(masters + infra_hosts + app + cns))
dns = [server.name for server in cluster_hosts
if server.metadata['host-type'] == 'dns']
load_balancers = [server.name for server in cluster_hosts
if server.metadata['host-type'] == 'lb']
osev3 = list(set(nodes + etcd + load_balancers))
inventory['cluster_hosts'] = {'hosts': [s.name for s in cluster_hosts]}
inventory['OSEv3'] = {'hosts': osev3}
inventory['masters'] = {'hosts': masters}
inventory['etcd'] = {'hosts': etcd}
inventory['nodes'] = {'hosts': nodes}
inventory['infra_hosts'] = {'hosts': infra_hosts}
inventory['app'] = {'hosts': app}
inventory['glusterfs'] = {'hosts': cns}
inventory['dns'] = {'hosts': dns}
inventory['lb'] = {'hosts': load_balancers}
return inventory
def get_docker_storage_mountpoints(volumes):
'''Check volumes to see if they're being used for docker storage'''
docker_storage_mountpoints = {}
for volume in volumes:
if volume.metadata.get('purpose') == "openshift_docker_storage":
for attachment in volume.attachments:
if attachment.server_id in docker_storage_mountpoints:
docker_storage_mountpoints[attachment.server_id].append(attachment.device)
else:
docker_storage_mountpoints[attachment.server_id] = [attachment.device]
return docker_storage_mountpoints
def build_inventory():
'''Build the dynamic inventory.'''
cloud = shade.openstack_cloud()
# TODO(shadower): filter the servers based on the `OPENSHIFT_CLUSTER`
# environment variable.
cluster_hosts = [
server for server in cloud.list_servers()
if 'metadata' in server and 'clusterid' in server.metadata]
inventory = base_openshift_inventory(cluster_hosts)
for server in cluster_hosts:
if 'group' in server.metadata:
group = server.metadata.get('group')
if group not in inventory:
inventory[group] = {'hosts': []}
inventory[group]['hosts'].append(server.name)
inventory['_meta'] = {'hostvars': {}}
# cinder volumes used for docker storage
docker_storage_mountpoints = get_docker_storage_mountpoints(cloud.list_volumes())
for server in cluster_hosts:
ssh_ip_address = server.public_v4 or server.private_v4
hostvars = {
'ansible_host': ssh_ip_address
}
public_v4 = server.public_v4 or server.private_v4
if public_v4:
hostvars['public_v4'] = server.public_v4
hostvars['openshift_public_ip'] = server.public_v4
# TODO(shadower): what about multiple networks?
if server.private_v4:
hostvars['private_v4'] = server.private_v4
hostvars['openshift_ip'] = server.private_v4
# NOTE(shadower): Yes, we set both hostname and IP to the private
# IP address for each node. OpenStack doesn't resolve nodes by
# name at all, so using a hostname here would require an internal
# DNS which would complicate the setup and potentially introduce
# performance issues.
hostvars['openshift_hostname'] = server.metadata.get(
'openshift_hostname', server.private_v4)
hostvars['openshift_public_hostname'] = server.name
if server.metadata['host-type'] == 'cns':
hostvars['glusterfs_devices'] = ['/dev/nvme0n1']
node_labels = server.metadata.get('node_labels')
# NOTE(shadower): the node_labels value must be a dict not string
if not isinstance(node_labels, Mapping):
node_labels = json.loads(node_labels)
if node_labels:
hostvars['openshift_node_labels'] = node_labels
# check for attached docker storage volumes
if 'os-extended-volumes:volumes_attached' in server:
if server.id in docker_storage_mountpoints:
hostvars['docker_storage_mountpoints'] = ' '.join(docker_storage_mountpoints[server.id])
inventory['_meta']['hostvars'][server.name] = hostvars
return inventory
if __name__ == '__main__':
print(json.dumps(build_inventory(), indent=4, sort_keys=True))
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