16.使用zabbix api创建screen

zabbix的screen功能可以把graph聚合起来，统一进行展示，

我们的需求是把同一个主机组的同一个item聚合起来，比如一个screen显示同一个组的所有主机的内存使用率，达到类似ganglia的效果，
由于服务器较多，所以我们调用zabbix api来进行创建。

参考地址如下：谢谢各位大牛
https://www.zabbix.org/wiki/Python_script_to_create_Screen_from_all_Items/Graphs_of_a_host
http://caiguangguang.blog.51cto.com/1652935/1387401
http://john88wang.blog.51cto.com/2165294/1538456

脚本如下：适用于v2.2.11

import json
import urllib2
import argparse

def requestjson(url, values):
data = json.dumps(values)
req = urllib2.Request(url, data, {'Content-Type': 'application/json-rpc'})
res = urllib2.urlopen(req, data)
output = json.loads(res.read())

return output

def authenticate(url, username, password):
values = {'jsonrpc': '2.0',
'method': 'user.login',
'params': {
'user': username,
'password': password
},
'id': '0'
}
output = requestjson(url, values)

return output['result']

def gethosts(groupname, url, auth):
host_list = []
values = {'jsonrpc': '2.0',
'method': 'hostgroup.get',
'params': {
'output': 'extend',
'filter': {'name': groupname},
'selectHosts': ['hostid']
},
'auth': auth,
'id': '2'
}
output = requestjson(url, values)
for host in output['result'][0]['hosts']:
host_list.append(host['hostid'])

return host_list

def getgraphs(host_list, name_list, url, auth, columns, graphtype=0, dynamic=0):
if (graphtype == 0):
selecttype = ['graphid']
select = 'selectGraphs'
if (graphtype == 1):
selecttype = ['itemid', 'value_type']
select = 'selectItems'

values = ({'jsonrpc': '2.0',
'method': 'graph.get',
'params': {
select: [selecttype, 'name'],
'output': ['graphid', 'name'],
'hostids': host_list,
'filter': {'name': name_list},
'sortfield': 'name'
},
'auth': auth,
'id': '3'
})

output = requestjson(url, values)
bb = sorted(output['result'])

graphs = []
if (graphtype == 0):
for i in bb:
graphs.append(i['graphid'])
if (graphtype == 1):
for i in bb:
if int(i['value_type']) in (0, 3):
graphs.append(i['itemid'])

graph_list = []
x = 0
y = 0
for graph in graphs:
graph_list.append({
'resourcetype': graphtype,
'resourceid': graph,
'width': '300',
'height': '100',
'x': str(x),
'y': str(y),
'colspan': '0',
'rowspan': '0',
'elements': '0',
'valign': '0',
'halign': '0',
'style': '0',
'url': '',
'dynamic': str(dynamic)
})
x += 1
if x == int(columns):
x = 0
y += 1

return graph_list

def screencreate(url, auth, screen_name, graphids, columns):
columns = int(columns)
if len(graphids) % columns == 0:
vsize = len(graphids) / columns
else:
vsize = (len(graphids) / columns) + 1

values = {'jsonrpc': '2.0',
'method': 'screen.create',
'params': [{
'name': screen_name,
'hsize': columns,
'vsize': vsize,
'screenitems': []
}],
'auth': auth,
'id': 2
}
for i in graphids:
values['params'][0]['screenitems'].append(i)
output = requestjson(url, values)

def main():
url = 'http://10.0.0.141/zabbix/api_jsonrpc.php'
username = 'admin'
password = '__Q&(0sH1zNAdD'
auth = authenticate(url, username, password)
host_list = gethosts(groupname, url, auth)
graph_ids = getgraphs(host_list, graphname, url, auth, columns)
screencreate(url, auth, screen_name, graph_ids, columns)

if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('-g', dest='groupname', nargs='+', metavar='groupname', type=str, help='which group you want to select')
parser.add_argument('-G', dest='graphname', nargs='+', metavar='graphname', type=str, help='which graph you want to select')
parser.add_argument('-c', dest='columns', metavar='columns', type=int, help='the screen columns')
parser.add_argument('-n', dest='screen_name', metavar='screen_name', type=str, help='the screen name')
args = parser.parse_args()

groupname = args.groupname
graphname = args.graphname
columns = args.columns
screen_name = args.screen_name

main()

使用方法：
python create_screen.py -g servers -G 'Network traffic on em1' -c 4 -n 'servers Network traffic on em1'