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OceanStor.py
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# -*- coding: utf-8 -*-
"""Connect to OceanStor device and get information."""
#
# There are implemented just a few functions for our monitoring needs, but
# the capabilitites are huge. EVERYTHING on an OceanStor can be done using
# the API. If not convinced, connect the browser to the device and fire up
# developer tools. You will see the browser is using the API for doing the
# job.
# Google "Huawei OceanStor REST API" for the documentation
#
# Toni Comerma
# Octubre 2017
#
# Modifications
#
# Jan 2020: Adapt to python for centos /
# TODO:
#
import urllib
import urllib2
import ssl
import json
import datetime
from cookielib import CookieJar
class OceanStorError(Exception):
"""Class for OceanStor derived errors."""
def __init__(self, msg=None):
if msg is None:
# Set some default useful error message
msg = "An error occured connecting to OceanStor"
super(OceanStorError, self).__init__(msg)
class OceanStor(object):
"""Class that connects to OceanStor device and gets information."""
def __init__(self, host, system_id, username, password, timeout):
self.host = host
self.system_id = system_id
self.username = username
self.password = password
self.timeout = timeout
# Create reusable http components
self.cookies = CookieJar()
self.ctx = ssl._create_unverified_context()
self.opener = urllib2.build_opener(urllib2.HTTPSHandler(context=self.ctx),
urllib2.HTTPCookieProcessor(self.cookies))
self.opener.addheaders = [('Content-Type', 'application/json; charset=utf-8')]
def alarm_level_text(self, level):
if level == 3:
return "warning"
elif level == 4:
return "major"
elif level == 5:
return "critical"
else:
return "unknown"
def healthstatus_text(self, level):
if level == "1":
return "normal"
elif level == "2":
return "fault"
elif level == "5":
return "degradated"
else:
return "unknown"
def runningstatus_text(self, level):
if level == "14":
return "pre-copy"
elif level == "16":
return "reconstruction"
elif level == "27":
return "online"
elif level == "28":
return "offline"
elif level == "32":
return "balancing"
elif level == "53":
return "initializing"
else:
return "unknown"
def date_to_human(self, timestamp):
return datetime.datetime.fromtimestamp(
int(timestamp)).strftime('%Y-%m-%d %H:%M:%S')
def query(self, url):
try:
response = self.opener.open(url)
content = response.read()
response_json = json.loads(content)
# Comprovar si request ok
if response_json['error']['code'] != 0:
raise OceanStorError(
"ERROR: Got an error response from system ({0})".
format(response_json['error']['code']))
except Exception as e:
raise OceanStorError("HTTP Exception: {0}".format(e))
return response_json
def login(self):
try:
formdata = {"username": self.username,
"password": self.password, "scope": "0"}
url = "https://{0}:8088/deviceManager/rest/{1}/sessions".\
format(self.host, self.system_id)
response = self.opener.open(url, json.dumps(formdata))
content = response.read()
response_json = json.loads(content)
# Comprvar login ok
if response_json['error']['code'] != 0:
raise OceanStorError(
"ERROR: Got an error response from system ({0})".
format(response_json['error']['code']))
self.iBaseToken = response_json['data']['iBaseToken']
self.opener.addheaders = [('iBaseToken', self.iBaseToken)]
except Exception as e:
raise OceanStorError("HTTP Exception: {0}".format(e))
return True
def logout(self):
try:
url = "https://{0}:8088/deviceManager/rest/{1}/sessions".\
format(self.host, self.system_id)
request = urllib2.Request(url)
request.get_method = lambda: 'DELETE'
f = self.opener.open(request)
content = f.read()
except:
# No error control. We are quitting anyway
return
def system(self):
try:
url = "https://{0}:8088/deviceManager/rest/{1}/system/".\
format(self.host, self.system_id)
response_json = self.query(url)
self.sectorsize = float(response_json['data']['SECTORSIZE'])
except Exception as e:
pass
return True
def alarms(self):
a = list()
try:
url = "https://{0}:8088/deviceManager/rest/{1}/alarm/currentalarm".\
format(self.host, self.system_id)
response_json = self.query(url)
for i in response_json["data"]:
a.append([self.alarm_level_text(i["level"]),
self.date_to_human(i["startTime"]),
i["description"]])
except Exception as e:
pass
return a
def filesystems(self, pattern):
a = list()
try:
self.system()
if "*" in pattern:
wildcard = True
pattern = pattern.replace('*', '')
else:
wildcard = False
url = "https://{0}:8088/deviceManager/rest/{1}/filesystem?".\
format(self.host, self.system_id)
url = url + urllib.urlencode({'filter': 'NAME:{0}'.
format(pattern)})
response_json = self.query(url)
# Get interesting data into list
for i in response_json["data"]:
if (
(wildcard and i["NAME"].startswith(pattern)) or
(not wildcard and i["NAME"] == pattern)
):
if i["ISCLONEFS"] == "false":
size = float(i["CAPACITY"])/1024 / \
1024*(self.sectorsize/1024) # To GB
free = float(i["AVAILABLECAPCITY"]) / \
1024/1024*(self.sectorsize/1024) # To GB
reserved = float(i["SNAPSHOTRESERVECAPACITY"]) / \
1024/1024*(self.sectorsize/1024) # To GB
usedreserved = float(i["SNAPSHOTUSECAPACITY"]) / \
1024/1024*(self.sectorsize/1024) # To GB
pctused = (1-((free+reserved)/size))*100
pctusedreserved = (usedreserved/(reserved+1))*100
a.append([i["NAME"],
size,
size-free-reserved,
pctused,
reserved,
usedreserved,
pctusedreserved])
except Exception as e:
raise OceanStorError("HTTP Exception: {0}".format(e))
return a
def diskdomains(self, pattern):
a = list()
try:
self.system()
if "*" in pattern:
wildcard = True
pattern = pattern.replace('*', '')
else:
wildcard = False
url = "https://{0}:8088/deviceManager/rest/{1}/diskpool".\
format(self.host, self.system_id)
response_json = self.query(url)
# Get interesting data into list
for i in response_json["data"]:
if (
(wildcard and i["NAME"].startswith(pattern)) or
(not wildcard and i["NAME"] == pattern)
):
size = float(i["TOTALCAPACITY"])/1024/1024*(self.sectorsize/1024) # To GB
free = float(i["FREECAPACITY"])/1024/1024*(self.sectorsize/1024) # To GB
pctused = (1-(free/size))*100
a.append([i["NAME"],
size,
size-free,
pctused,
self.healthstatus_text(i["HEALTHSTATUS"]),
self.runningstatus_text(i["RUNNINGSTATUS"])])
except Exception as e:
raise OceanStorError("HTTP Exception: {0}".format(e))
return a
def storagepools(self, pattern):
a = list()
try:
self.system()
if "*" in pattern:
wildcard = True
pattern = pattern.replace('*', '')
else:
wildcard = False
url = "https://{0}:8088/deviceManager/rest/{1}/storagepool".\
format(self.host, self.system_id)
response_json = self.query(url)
# Get interesting data into list
for i in response_json["data"]:
if (
(wildcard and i["NAME"].startswith(pattern)) or
(not wildcard and i["NAME"] == pattern)
):
size = float(i["USERTOTALCAPACITY"])/1024/1024*(self.sectorsize/1024) # To GB
free = float(i["USERFREECAPACITY"])/1024/1024*(self.sectorsize/1024) # To GB
pctused = (1-(free/size))*100
a.append([i["NAME"],
size,
size-free,
pctused,
self.healthstatus_text(i["HEALTHSTATUS"]),
self.runningstatus_text(i["RUNNINGSTATUS"])])
except Exception as e:
raise OceanStorError("HTTP Exception: {0}".format(e))
return a