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Add OpenStack Operator

Define as a plugin so that Airflow is able to
pick up the plugin and all the operators it define
changes/87/569187/1
eanylin 4 years ago
parent
commit
eab86b6a87
  1. 66
      shipyard_airflow/dags/openstack_api_call.py
  2. 88
      shipyard_airflow/plugins/openstack_operators.py

66
shipyard_airflow/dags/openstack_api_call.py

@ -1,25 +1,38 @@
# -*- coding: utf-8 -*-
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
"""
OpenStack CLI
Perform basic OpenStack CLI calls
### Openstack CLI Dag
"""
import airflow
from airflow import DAG
from airflow.operators import OpenStackOperator
from airflow.operators.bash_operator import BashOperator
from datetime import datetime, timedelta
import os
default_args = {
'owner': 'airflow',
'depends_on_past': False,
'start_date': datetime(2017, 6, 14),
'email': ['airflow@airflow.com'],
'start_date': airflow.utils.dates.days_ago(2),
'email': ['airflow@example.com'],
'email_on_failure': False,
'email_on_retry': False,
'retries': 1,
'retry_delay': timedelta(minutes=5),
'retry_delay': timedelta(minutes=1),
}
dag = DAG('openstack_api_call', default_args=default_args, schedule_interval=None)
dag = DAG('openstack_cli', default_args=default_args, schedule_interval=None)
# print_date
t1 = BashOperator(
@ -27,21 +40,36 @@ t1 = BashOperator(
bash_command='date',
dag=dag)
# Current assumption is that we will be able to retrieve information from
# data manager (DeckHand) to create the admin-openrc.sh that is needed for
# airflow to perform OpenStack API calls
t2 = BashOperator(
task_id='nova_list',
bash_command='source ' + os.getcwd() + '/dags/admin-openrc.sh' + ';' + 'nova' + ' list',
retries=3,
# openstack endpoint list
t2 = OpenStackOperator(
task_id='endpoint_list_task',
openrc_file='/home/ubuntu/airflow/openrc.sh',
openstack_command='openstack endpoint list',
dag=dag)
# openstack service list
t3 = OpenStackOperator(
task_id='service_list_task',
openrc_file='/home/ubuntu/airflow/openrc.sh',
openstack_command='openstack service list',
dag=dag)
# openstack server list
t4 = OpenStackOperator(
task_id='server_list_task',
openrc_file='/home/ubuntu/airflow/openrc.sh',
openstack_command='openstack server list',
dag=dag)
t3 = BashOperator(
task_id='neutron_net_list',
bash_command='source ' + os.getcwd() + '/dags/admin-openrc.sh' + ';' + 'neutron' + ' net-list',
retries=3,
# openstack network list
t5 = OpenStackOperator(
task_id='network_list_task',
openrc_file='/home/ubuntu/airflow/openrc.sh',
openstack_command='openstack network list',
dag=dag)
t2.set_upstream(t1)
t3.set_upstream(t1)
t4.set_upstream(t1)
t5.set_upstream(t1)

88
shipyard_airflow/plugins/openstack_operators.py

@ -0,0 +1,88 @@
# -*- coding: utf-8 -*-
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import logging
import subprocess
import sys
import os
import shlex
from airflow.exceptions import AirflowException
from airflow.models import BaseOperator
from airflow.plugins_manager import AirflowPlugin
from airflow.utils.decorators import apply_defaults
class OpenStackOperator(BaseOperator):
"""
Performs OpenStack CLI calls
:openrc_file: Path of the openrc file
:openstack_command: The OpenStack command to be executed
"""
@apply_defaults
def __init__(self,
openrc_file,
openstack_command=None,
xcom_push=False,
*args, **kwargs):
super(OpenStackOperator, self).__init__(*args, **kwargs)
self.openrc_file = openrc_file
self.openstack_command = openstack_command
self.xcom_push_flag = xcom_push
def execute(self, context):
logging.info("Running OpenStack Command: " + self.openstack_command)
# Emulate "source" in bash. Sets up environment variables.
pipe = subprocess.Popen(". %s; env" % self.openrc_file, stdout=subprocess.PIPE, shell=True)
data = pipe.communicate()[0]
env = dict((line.split("=", 1) for line in data.splitlines()))
os.environ.update(env)
# Execute the OpenStack CLI Command
openstack_cli = subprocess.Popen(shlex.split(self.openstack_command), stdout=subprocess.PIPE, stderr=subprocess.STDOUT)
# Logs Output
logging.info("Output:")
line = ''
for line in iter(openstack_cli.stdout.readline, b''):
line = line.strip()
logging.info(line)
# Wait for child process to terminate. Set and return returncode attribute.
openstack_cli.wait()
logging.info("Command exited with "
"return code {0}".format(openstack_cli.returncode))
# Raise Execptions if OpenStack Command Fails
if openstack_cli.returncode:
raise AirflowException("OpenStack Command Failed")
"""
Push response to an XCom if xcom_push is True
"""
if self.xcom_push_flag:
return line
class OpenStackCliPlugin(AirflowPlugin):
name = "openstack_cli_plugin"
operators = [OpenStackOperator]
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