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##############################################################################
# Copyright 2017 Parker Berberian and Others #
# #
# 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 requests
import sys
import json
import time
from st2actions.runners.pythonrunner import Action
class FogAction(Action):
"""
This class talks with the REST web api for the FOG server.
"""
def __init__(self, config=None):
self.baseURL = config['fog']['address']
self.fogKey = config['fog']['api_key']
self.userKey = config['fog']['user_key']
self.updateHeader()
def updateHeader(self):
"""
recreates the http header used to talk to the fog api
"""
self.header = {}
self.header['fog-api-token'] = self.fogKey
self.header['fog-user-token'] = self.userKey
def getImageID(self, img=None, os=None, host=None):
"""
returns the numerical id associated with the given img name or
operating system. If both are given, the img gets priority.
if img is a number, it is assumed to be a valid id
"""
# st2 will promote an empty arg to the str "None" :(
if not img or img == "None":
return self.getImageIDFromOS(os, host)
try:
return int(img)
except:
url = self.baseURL+"image"
images = requests.get(url=url, headers=self.header)
images = images.json()['images']
for image in images:
if img == image['name']:
return image['id']
return -1
def getImageIDFromOS(self, os, host):
enum = {"ubuntu": "ubuntu_image",
"centos": "centos_image",
"suse": "suse_image"
}
os = os.lower()
if os not in enum.keys():
return -1
host_dict = json.loads(
self.action_service.get_value(name=host, local=False)
)
return int(host_dict[enum[os]])
def delTask(self, hostNum):
"""
Tries to delete an existing task for the host
with hostNum as a host number
"""
try:
url = self.baseURL+'fog/host/'+str(hostNum)+'/cancel'
req = requests.delete(url, headers=self.header)
if req.status_code == 200:
self.logger.info("%s", "successfully deleted image task")
except Exception:
self.logger.exception("Failed to delete the imaging task!")
def getHostNumber(self, hostname):
"""
returns the host number of given host
"""
try:
req = requests.get(self.baseURL+"host", headers=self.header)
hostData = req.json()
if hostData is not None:
for hostDict in hostData['hosts']:
if hostname == hostDict['name']:
return hostDict['id']
return -1
except Exception:
self.logger.exception('%s', "Failed to connect to the FOG server")
def request(self, url, data=None, method="get"):
if data is not None:
return self.dataRequest(url, data, method=method)
try:
response = requests.get(url, headers=self.header)
return response.json()
except Exception:
self.logger.exception("Failed to reach FOG at %s", url)
sys.exit(1)
def dataRequest(self, url, data, method="post"):
methods = {
"post": requests.post,
"put": requests.put
}
try:
return methods[method](url, json=data, headers=self.header)
except Exception:
self.logger.exception("Failed to reach FOG at %s", url)
sys.exit(1)
def getFogHost(self, host):
hostData = self.action_service.get_value(host, local=False)
return json.loads(hostData)['fog_name']
def waitForTask(self, taskID):
"""
Watches a task and waits for it to finish (disapear).
There may be a smarter way to do this and track errors,
but st2 will timeout for me if something goes wrong
"""
task = self.getTask(taskID)
while(task):
time.sleep(15)
task = self.getTask(taskID)
def getAllTasks(self):
try:
tasks = requests.get(
self.baseURL+'task/current',
headers=self.header
).json()['tasks']
return tasks
except Exception:
return []
def getTask(self, taskID):
for task in self.getAllTasks():
if task['id'] == taskID:
return task
return {}
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