215 lines
7.9 KiB
Python
215 lines
7.9 KiB
Python
#!/usr/bin/python3
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from time import sleep
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from os import fdopen
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from dbus import SystemBus, Array
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from dbus.exceptions import DBusException
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from subprocess import run
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from ansible.module_utils.basic import AnsibleModule
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def stop(bus, machines):
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changed = False
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remote_object = bus.get_object('org.freedesktop.machine1',
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'/org/freedesktop/machine1',
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False,
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)
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res = remote_object.ListMachines(dbus_interface='org.freedesktop.machine1.Manager')
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started_machines = [str(r[0]) for r in res if str(r[0]) != '.host']
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for host in machines:
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if host not in started_machines:
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continue
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changed = True
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remote_object.TerminateMachine(host, dbus_interface='org.freedesktop.machine1.Manager')
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idx = 0
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errors = []
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while True:
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res = remote_object.ListMachines(dbus_interface='org.freedesktop.machine1.Manager')
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started_machines = [str(r[0]) for r in res if str(r[0]) != '.host']
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for host in machines:
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if host in started_machines:
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break
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else:
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break
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sleep(1)
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idx += 1
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if idx == 120:
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errors.append('Cannot not stopped: ' + ','.join(started_machines))
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break
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return changed, errors
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def start(bus, machines):
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changed = False
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remote_object = bus.get_object('org.freedesktop.machine1',
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'/org/freedesktop/machine1',
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False,
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)
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res = remote_object.ListMachines(dbus_interface='org.freedesktop.machine1.Manager')
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started_machines = [str(r[0]) for r in res if str(r[0]) != '.host']
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remote_object_system = bus.get_object('org.freedesktop.systemd1',
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'/org/freedesktop/systemd1',
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False,
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)
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for host in machines:
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if host in started_machines:
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continue
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changed = True
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service = f'systemd-nspawn@{host}.service'
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remote_object_system.StartUnit(service, 'fail', dbus_interface='org.freedesktop.systemd1.Manager')
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errors = []
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idx = 0
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while True:
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res = remote_object.ListMachines(dbus_interface='org.freedesktop.machine1.Manager')
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started_machines = [str(r[0]) for r in res if str(r[0]) != '.host']
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for host in machines:
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if host not in started_machines:
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break
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else:
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break
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sleep(1)
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idx += 1
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if idx == 120:
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hosts = set(machines) - set(started_machines)
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errors.append('Cannot not start: ' + ','.join(hosts))
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break
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if not errors:
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idx = 0
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for host in machines:
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cmd = ['/usr/bin/systemctl', 'is-system-running']
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error = False
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while True:
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try:
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ret = []
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res = remote_object.OpenMachineShell(host,
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'',
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cmd[0],
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Array(cmd, signature='s'),
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Array(['TERM=dumb'], signature='s'),
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dbus_interface='org.freedesktop.machine1.Manager',
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)
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fd = res[0].take()
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fh = fdopen(fd)
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while True:
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try:
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ret.append(fh.readline().strip())
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except OSError as err:
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if err.errno != 5:
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raise err from err
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break
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if not ret:
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errors.append(f'Cannot check {host} status')
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error = True
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break
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if ret[0] in ['running', 'degraded']:
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break
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except DBusException:
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pass
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idx += 1
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sleep(1)
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if idx == 120:
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errors.append(f'Cannot not start {host} ({ret})')
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break
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if error:
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continue
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if ret and ret[0] == 'running':
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continue
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cmd = ['/usr/bin/systemctl', '--state=failed', '--no-legend', '--no-page']
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res = remote_object.OpenMachineShell(host,
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'',
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cmd[0],
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Array(cmd, signature='s'),
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Array(['TERM=dumb'], signature='s'),
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dbus_interface='org.freedesktop.machine1.Manager',
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)
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fd = res[0].take()
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fh = fdopen(fd)
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ret = []
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idx2 = 0
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while True:
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try:
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ret.append(fh.readline().strip())
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except OSError as err:
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if err.errno != 5:
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raise err from err
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break
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idx2 += 1
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if idx2 == 120:
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errors.append(f'Cannot not get status to {host}')
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break
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errors.append(f'{host}: ' + '\n'.join(ret))
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return changed, errors
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def enable(machines):
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cmd = ['/usr/bin/machinectl', 'enable'] + machines
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run(cmd)
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return True
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def run_module():
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# define available arguments/parameters a user can pass to the module
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module_args = dict(
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state=dict(type='str', required=True),
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machines=dict(type='list', required=True),
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)
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# seed the result dict in the object
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# we primarily care about changed and state
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# changed is if this module effectively modified the target
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# state will include any data that you want your module to pass back
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# for consumption, for example, in a subsequent task
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result = dict(
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changed=False,
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message=''
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)
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# the AnsibleModule object will be our abstraction working with Ansible
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# this includes instantiation, a couple of common attr would be the
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# args/params passed to the execution, as well as if the module
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# supports check mode
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module = AnsibleModule(
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argument_spec=module_args,
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supports_check_mode=True
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)
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# if the user is working with this module in only check mode we do not
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# want to make any changes to the environment, just return the current
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# state with no modifications
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if module.check_mode:
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module.exit_json(**result)
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# manipulate or modify the state as needed (this is going to be the
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# part where your module will do what it needs to do)
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machines = module.params['machines']
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if module.params['state'] == 'stopped':
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bus = SystemBus()
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result['changed'], errors = stop(bus, machines)
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if errors:
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errors = '\n\n'.join(errors)
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module.fail_json(msg=f'Some machines are not stopping correctly {errors}', **result)
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elif module.params['state'] == 'started':
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bus = SystemBus()
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result['changed'], errors = start(bus, machines)
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if errors:
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errors = '\n\n'.join(errors)
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module.fail_json(msg=f'Some machines are not running correctly {errors}', **result)
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elif module.params['state'] == 'enabled':
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result['changed'] = enable(machines)
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else:
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module.fail_json(msg=f"Unknown state: {module.params['state']}")
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# in the event of a successful module execution, you will want to
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# simple AnsibleModule.exit_json(), passing the key/value results
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module.exit_json(**result)
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def main():
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run_module()
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if __name__ == '__main__':
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main()
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