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#!@PYTHON@ -tt
#
# Fence agent for eCloud and eCloud VPC
# https://www.ans.co.uk/cloud-and-infrastructure/ecloud/
#
# Copyright (c) 2022 ANS Group Limited
#
# This library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
#
# This library is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# Lesser General Public License for more details.
#
# You should have received a copy of the GNU Lesser General Public
# License along with this library. If not, see
# <http://www.gnu.org/licenses/>.
import sys
import time
import atexit
import logging
import requests
sys.path.append("@FENCEAGENTSLIBDIR@")
from fencing import *
from fencing import run_delay, fail_usage, fail, EC_TIMED_OUT
API_BASE = "https://api.ukfast.io/ecloud"
API_MONITOR = API_BASE + "/ping"
API_VPC_INSTANCE_DATA = API_BASE + "/v2/instances/:ID"
API_VPC_POWER_ON = API_BASE + "/v2/instances/:ID/power-on"
API_VPC_POWER_OFF = API_BASE + "/v2/instances/:ID/power-off"
API_V1_INSTANCE_DATA = API_BASE + "/v1/vms/:ID"
API_V1_POWER_ON = API_BASE + "/v1/vms/:ID/power-on"
API_V1_POWER_OFF = API_BASE + "/v1/vms/:ID/power-off"
def set_power_fn(conn, options):
logging.debug("setting power {}".format(options['--action']))
del conn
action = options['--action']
vpc = options['--ecloud-vpc']
plug = options['--plug']
url = fence_url(vpc, action, plug)
hdrs = headers(options['--apikey'])
logging.info("executing '{}' action on '{}'".format(action, plug))
retries = 0
while True:
resp = requests.put(url, headers=hdrs)
if resp.status_code == 409:
# If we attempt to power the instance back on too soon after powering it off,
# e.g. during a reboot, the API will return a 409 because while the power status
# has changed, the task is still executing. Retry the action until we exceed
# retries or get a different status code.
if retries >= 6:
logging.error("timed out trying to execute '{}' action after repeated 409 codes from API", action)
fail(EC_TIMED_OUT)
time.sleep(2)
retries += 1
continue
if resp.status_code != 202:
logging.error("unexpected status code '{}' from endpoint '{}': {}".format(
resp.status_code, url, resp.text
))
break
def get_power_fn(conn, options):
logging.debug("getting power state")
del conn
vpc = options['--ecloud-vpc']
plug = options['--plug']
url = instance_data_url(vpc, plug)
hdrs = headers(options['--apikey'])
resp = requests.get(url, headers=hdrs)
if resp.status_code != 200:
logging.error("unexpected status code ('{}') from endpoint '{}': {}".format(
resp.status_code, url, resp.text
))
return "bad status {}".format(resp.status_code)
instance = resp.json()['data']
if vpc:
logging.debug("power state return value: {}".format(instance['online']))
return "on" if instance['online'] else "off"
else:
if instance['power_status'] == "Online":
return "on"
elif instance['power_status'] == "Offline":
return "off"
else:
# Could be 'Unknown' or other value
return instance['power_status']
def headers(apikey):
return {
"Authorization": apikey,
"User-Agent": "fence_ecloud"
}
def itp(url, plug):
return url.replace(':ID', plug)
def fence_url(vpc, action, plug):
if action == "on":
return itp(API_VPC_POWER_ON, plug) if vpc else itp(API_V1_POWER_ON, plug)
if action == "off":
return itp(API_VPC_POWER_OFF, plug) if vpc else itp(API_V1_POWER_OFF, plug)
fail_usage("no available API configured for action '{}'".format(action))
def instance_data_url(vpc, plug):
return itp(API_VPC_INSTANCE_DATA, plug) if vpc else itp(API_V1_INSTANCE_DATA, plug)
def main():
device_opt = ["apikey", "port", "no_login", "no_password"]
all_opt["apikey"] = {
"getopt": ":",
"longopt": "apikey",
"help": "--apikey=[key] eCloud API Key",
"required": "1",
"shortdesc": "API Key",
"order": 0,
}
all_opt["port"]["help"] = "-n, --plug=[instance] Instance ID (VPC) or server ID (v1)"
atexit.register(atexit_handler)
options = check_input(device_opt, process_input(device_opt))
docs = {}
docs["shortdesc"] = "Fence Agent for ANS eCloud"
docs["longdesc"] = "fence_ecloud is a fence agent for use with the ANS \
eCloud platform which is compatible with eCloud VPC and eCloud v1."
docs["vendorurl"] = "https://www.ans.co.uk"
show_docs(options, docs)
if options['--action'] in ['on', 'off', 'reboot', 'status']:
plug = options['--plug']
options['--ecloud-vpc'] = True
if not plug.startswith("i-"):
options['--ecloud-vpc'] = False
run_delay(options)
fence_action(None, options, set_power_fn, get_power_fn)
if __name__ == '__main__':
main()
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