Zabbix(四) : 通過修改Zabbix官方redis模板監控微軟雲Azure上多台MySQL執行個體,zabbixredis
由於微軟雲上的MySQL執行個體無法安裝外掛程式來匯出資料,因此參考上一篇 通過Zabbix官方模板監控微軟雲Azure上多台Redis執行個體, 我們可以修改zabbix官方redis指令碼,通過show status等命令擷取到mysql的狀態指標,用trap-messages模式發送給zabbix來監控微軟雲上的MySQL執行個體。
1. 運行環境:
OS:CentOS 7.3 / Python: 2.7.3/ Pip: 9.0.1 / Zabbix:3.2.8 / MySQL:微軟雲MySQL 5.7
Zabbix官方提供的redis監控模板,我們修改官方提供的python指令碼來監控MySQL。
項目地址:https://github.com/blacked/zbx_redis_template
Zabbix所有官方模板:http://www.zabbix.org/wiki/Zabbix_Templates
2. 部署
trap-messages方式的說明請參考上一篇 通過Zabbix官方模板監控微軟雲Azure上多台Redis執行個體。
1> 安裝Python依賴
# yum -y install python-pip# pip install argparse# pip install pymysql
2> 將zbx_redis_stats.py放到zabbix伺服器上某路徑下並重新命名,如/etc/zabbix/script/mysql/zbx_mysql_stats.py。
3> 修改指令碼,下面是我修改的指令碼,監控了show status擷取的資訊以及資料庫表佔用的空間等資訊,可以直接拷貝,或者添加自己需要監控的其他資訊。
1 # !/usr/bin/python 2 3 import sys, pymysql, json, re, struct, time, socket, argparse 4 5 parser = argparse.ArgumentParser(description='Zabbix MySQL status script') 6 parser.add_argument('mysql_hostname', nargs='?') 7 parser.add_argument('metric', nargs='?') 8 parser.add_argument('db', default='none', nargs='?') 9 parser.add_argument('-p', '--port', dest='mysql_port', action='store', help='MySQL server port', default=3306, type=int) 10 parser.add_argument('-a', '--auth', dest='mysql_pass', action='store', help='MySQL server pass', default=None) 11 parser.add_argument('-u', '--user', dest='mysql_user', action='store', help='MySQL server user', default=None) 12 args = parser.parse_args() 13 14 zabbix_host = '127.0.0.1' # Zabbix Server IP 15 zabbix_port = 10051 # Zabbix Server Port 16 17 # Name of monitored server like it shows in zabbix web ui display 18 mysql_hostname = args.mysql_hostname if args.mysql_hostname else socket.gethostname() 19 20 21 class Metric(object): 22 def __init__(self, host, key, value, clock=None): 23 self.host = host 24 self.key = key 25 self.value = value 26 self.clock = clock 27 28 def __repr__(self): 29 result = None 30 if self.clock is None: 31 result = 'Metric(%r, %r, %r)' % (self.host, self.key, self.value) 32 else: 33 result = 'Metric(%r, %r, %r, %r)' % (self.host, self.key, self.value, self.clock) 34 return result 35 36 37 def value_format(value): 38 if value.isdigit() is True: 39 value = int(value) 40 return value 41 42 43 def send_to_zabbix(metrics, zabbix_host='127.0.0.1', zabbix_port=10051): 44 result = None 45 j = json.dumps 46 metrics_data = [] 47 for m in metrics: 48 clock = m.clock or ('%d' % time.time()) 49 metrics_data.append( 50 ('{"host":%s,"key":%s,"value":%s,"clock":%s}') % (j(m.host), j(m.key), j(m.value), j(clock))) 51 json_data = ('{"request":"sender data","data":[%s]}') % (','.join(metrics_data)) 52 data_len = struct.pack('<Q', len(json_data)) 53 packet = 'ZBXD\x01' + data_len + json_data 54 55 # For debug: 56 # print(packet) 57 # print(':'.join(x.encode('hex') for x in packet)) 58 59 try: 60 zabbix = socket.socket() 61 zabbix.connect((zabbix_host, zabbix_port)) 62 zabbix.sendall(packet) 63 resp_hdr = _recv_all(zabbix, 13) 64 if not resp_hdr.startswith('ZBXD\x01') or len(resp_hdr) != 13: 65 print('Wrong zabbix response') 66 result = False 67 else: 68 resp_body_len = struct.unpack('<Q', resp_hdr[5:])[0] 69 resp_body = zabbix.recv(resp_body_len) 70 zabbix.close() 71 72 resp = json.loads(resp_body) 73 # For debug 74 # print(resp) 75 if resp.get('response') == 'success': 76 result = True 77 else: 78 print('Got error from Zabbix: %s' % resp) 79 result = False 80 except: 81 print('Error while sending data to Zabbix') 82 result = False 83 finally: 84 return result 85 86 87 def _recv_all(sock, count): 88 buf = '' 89 while len(buf) < count: 90 chunk = sock.recv(count - len(buf)) 91 if not chunk: 92 return buf 93 buf += chunk 94 return buf 95 96 97 def main(): 98 if mysql_hostname and args.metric: 99 100 client = pymysql.connect(host=mysql_hostname, user=args.mysql_user, password=args.mysql_pass)101 cursor = client.cursor()102 cursor.execute("show status")103 data = cursor.fetchall()104 dict_local = {}105 for k, v in data:106 dict_local[k] = v107 108 cursor.execute("select SCHEMA_NAME from information_schema.schemata ")109 db = cursor.fetchall()110 dblist = []111 for i in db:112 dblist.append(i[0])113 114 if args.metric:115 def list_db():116 if args.db in dblist:117 print(dblist)118 else:119 print('database_detect')120 121 def default():122 if args.metric in dict_local.keys():123 print(dict_local[args.metric])124 125 {126 'list_db': list_db127 }.get(args.metric, default)()128 129 else:130 print('Not selected metric')131 else:132 client = pymysql.connect(host=mysql_hostname, user=args.mysql_user, password=args.mysql_pass)133 cursor = client.cursor()134 cursor.execute("show status")135 data = cursor.fetchall()136 137 a = []138 for k, v in data:139 k = k.lower()140 v = value_format(v)141 a.append(Metric(mysql_hostname, ('azuremysql[%s]' % k), v))142 143 # cursor.execute("show processlist;")144 cursor.execute("select count(*) from information_schema.processlist;")145 processdata = cursor.fetchall()146 # process_count = len(processdata)147 process_count = processdata[0][0]148 a.append(Metric(mysql_hostname, 'azuremysql[process_count]', process_count))149 150 cursor.execute(151 "select table_schema,round(sum(data_length+index_length)/1024/1024,4) from information_schema.tables group by table_schema;")152 spacedata = cursor.fetchall()153 totalspace = 0154 for k, v in spacedata:155 a.append(Metric(mysql_hostname, ('azuremysql[%s]' % k), float(v)))156 totalspace += float(v)157 a.append(Metric(mysql_hostname, 'azuremysql[totalspace]', totalspace))158 159 # Send packet to zabbix160 send_to_zabbix(a, zabbix_host, zabbix_port)161 # for i in a:162 # print(i)163 cursor.close()164 client.close()165 166 167 if __name__ == '__main__':168 main()zbx_mysql_stats.py
zbx_mysql_stats.py
4> 測試指令碼是否可以正常串連到微軟雲上MySQL並擷取參數:
/etc/zabbix/script/mysql/zbx_mysql_status.py -u mysqluser -a mysqlpasswd test.mysqldb.chinacloudapi.cn list_db
5> 添加crontab,定期執行指令碼發送資料給zabbix,注意若密碼中含有%需要用 \ 進行轉義 (\%)。
若要監控多台MySQL,則添加多個crontab:
*/1 * * * * /etc/zabbix/script/mysql/zbx_mysql_status.py -u mysqluser -a mysqlpasswd test.mysqldb.chinacloudapi.cn
6> 建立MySQL監控模板,注意監控項類型應選擇"zabbix採集器",若使用的指令碼,索引值為"azuremysql[xxxxxxx]",否則請使用自己指令碼定義的索引值。
附件是我建立的一個模板,添加了一些監控項,並不完整,可以在此基礎上再添加需要的監控項。
zbx_Azure_MySQL_template.xml
7> 使用MySQL hostname建立主機,連結模板,即可實現zabbix監控。