1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
#!/usr/bin/env python2
# -*- encoding: utf-8 -*-
# -------------------------------------------------------------------------
# Copyright (c) 2018 AT&T Intellectual Property
#
# 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 sys
import getopt
import json
import requests
musicLocation =""
base_url = ""
keyspaceName = ""
tableName = "replicas"
aid = ""
namespace = ""
def parseConfig(config):
global musicLocation, base_url, keyspaceName, aid, namespace
config = json.load(open(config))
musicLocations = config["music-location"]
base_url = "http://" + musicLocations[0] + ":8080/MUSIC/rest/v2"
keyspaceName = "prom_" + config["app-name"]
aid = config["aid"]
namespace = config["namespace"]
def getHeaders():
headers = {'aid': aid, 'ns': namespace}
return headers
def getReplica(id):
response = requests.get(base_url+"/keyspaces/"+keyspaceName+"/tables/"+tableName+"/rows?id="+id,
headers=getHeaders())
return response.json()["result"]["row 0"]
def getAllReplicas():
response = requests.get(base_url+"/keyspaces/"+keyspaceName+"/tables/"+tableName+"/rows",
headers=getHeaders())
print json.dumps(response.json()["result"], indent=2, sort_keys=True)
def acquireLock(lockref):
response = requests.get(base_url+"/locks/acquire/"+lockref,
headers=getHeaders())
return response.json()
def releaseLock(lockref):
print "releasing lock: " + lockref
response = requests.delete(base_url+"/locks/release/"+lockref,
headers=getHeaders())
#return response.json()
return
def getCurrentLockHolder(lockname):
response = requests.get(base_url+"/locks/enquire/"+lockname,
headers=getHeaders())
return response.json()
def releaseLocksUntil(lockname, lockref):
"""release locks until the lockref passed in is the current lock holder
this essentially forces the lockref to become the active prom site"""
acquire = acquireLock(lockref)
while acquire["status"]=="FAILURE":
if acquire["message"]=="Lockid doesn't exist":
print "[ERROR] Lock" , lockref, "cannot be found."
return False
currentLockHolder = getCurrentLockHolder(lockname)
if currentLockHolder["lock"]["lock-holder"] is not lockref:
releaseLock(currentLockHolder["lock"]["lock-holder"])
acquire = acquireLock(lockref)
return True
def deleteLock(lockname):
response = requests.delete(base_url + "/locks/delete/"+lockname,
headers=getHeaders())
return response.json()
def usage():
print "usage: promoverride -c <prom config file> -i <prom_id>"
print " -c, --config <prom config file> OPTIONAL location of the 'config.json' file for prom." \
" Default location is current directory"
print " -i <prom_id> is the replica site to force to become active"
print " -l, --list to list current prom instances"
print "\n Config file is needed to read information about music location and keyspace information"
if __name__=="__main__":
try:
opts, args = getopt.getopt(sys.argv[1:], "c:i:l", ["config=", "id=", "list"])
except getopt.GetoptError as err:
print(err)
usage()
exit(1)
# defaults here
configFile = "config.json"
id = None
listInstances = False
for opt, args in opts:
if opt in ("-c", "--config"):
configFile = args
elif opt in ("-i", "--id"):
id = args
elif opt in ("-l", "--list"):
listInstances = True
else:
assert False, "unhandled option " + str(opt)
parseConfig(configFile)
if listInstances:
# todo list current instances
getAllReplicas()
exit(0)
if id == None:
print "Mandatory prom id not provided."
usage()
exit(1)
replicaInfo = getReplica(id)
print "Forcing prom site ", id, " to become active"
if releaseLocksUntil(keyspaceName+".active.lock", replicaInfo["lockref"]) is True:
print "prom site", id, " should now be active"
|
