ElasticSearch monitoring and alert base on ElastAlert
Dynamically generate alarm rules and send email to relative people.based on a given parameter or configuration Elastalert
The directory construct look following
1├── elastalert
2├── generate_rule.py
3├── param.json
4├── rules
5└── template
You can also through pip install elastalert installing elastalert package. I’m going to use it directly here
The templatedirectory store tpl file, use this template generate some rules file to rules directory. and used elastalert
Configuration file param.json
1{
2 "dev": {
3 "public_config": {
4 "run_every": 5,
5 "buffer_time": 15,
6 "es_host": "dev.es.svc.cluster.local",
7 "es_port": 80,
8 "smtp_host": "email-smtp.us-west-2.amazonaws.com",
9 "from_addr": "[email protected]",
10 "notify_email": "[email protected]",
11 "smtp_port": 25,
12 "email_cc": [],
13 "alert_subject": "[DEV][{1}][{0}][ELK Error Log]There are {2} error(s) in last 2 hours",
14 "alert_subject_args": "['app_id','ecs_cluster','num_hits']"
15 },
16 "rules": {
17 "frontend": {
18 "name": "frontend",
19 "template": "template/crontab.tpl",
20 "index_name": "frontend-*",
21 "event_num": 2,
22 "f_time": 15,
23 "cron": "0 */2 * * *",
24 "query_string": "app_id:frontend AND message:error",
25 "emails": [
26 "[email protected]"
27 ]
28 },
29 "nginx": {
30 "name": "nginx",
31 "template": "template/crontab.tpl",
32 "index_name": "nginx-*",
33 "event_num": 2,
34 "f_time": 15,
35 "cron": "0 */5 * * *",
36 "query_string": "app_id:nginx AND status:500 AND message:error",
37 "emails": [
38 "[email protected]"
39 ]
40 },
41 "consumer": {
42 "name": "consumer",
43 "template": "template/crontab.tpl",
44 "index_name": "consumer-*",
45 "event_num": 3,
46 "f_time": 15,
47 "cron": "0 */2 * * *",
48 "query_string": "app_id:consumer AND log_level:error",
49 "emails": [
50 "[email protected]",
51 "[email protected]"
52 ]
53 },
54 "provider": {
55 "name": "provider",
56 "template": "template/crontab.tpl",
57 "index_name": "provider-*",
58 "event_num": 3,
59 "f_time": 15,
60 "cron": "0 */2 * * *",
61 "query_string": "app_id:provider AND log_level:error",
62 "emails": [
63 "[email protected]"
64 ]
65 },
66 "other-service": {
67 "name": "other-service",
68 "template": "template/crontab.tpl",
69 "index_name": "*",
70 "event_num": 3,
71 "f_time": 15,
72 "cron": "0 */2 * * *",
73 "query_string": "app_id:example-service AND log_level:error",
74 "emails": [
75 "[email protected]"
76 ]
77 }
78 }
79 },
80 "qa": {
81 "public_config": {
82 "run_every": 5,
83 "buffer_time": 15,
84 "es_host": "qa.es.svc.cluster.local",
85 "es_port": 80,
86 "smtp_host": "email-smtp.us-west-2.amazonaws.com",
87 "from_addr": "[email protected]",
88 "notify_email": "[email protected]",
89 "smtp_port": 25,
90 "email_cc": ["[email protected]"],
91 "alert_subject": "[DEV] ServiceError: {0}",
92 "alert_subject_args": "['app_id']"
93 },
94 "rules": {
95 "account-service": {
96 "name": "account-service",
97 "template": "template/normal.tpl",
98 "index_name": "account-service-*",
99 "event_num": 2,
100 "f_time": 15,
101 "cron": "0 */2 * * *",
102 "query_string": "app_id:(account-service) AND log_level:error",
103 "emails": [
104 "[email protected]"
105 ]
106 }
107 }
108 }
109}
This parameters file include different service rule Settings for different environments
The generate_rule.py produce rules yaml file to rules directory according to the definition of the template file
1#!/usr/bin/env python
2# -- coding:utf-8 --
3
4from jinja2 import Template
5import json
6import sys
7
8
9class GeneratorTemp:
10 """
11 handle json template
12 """
13 __data = []
14 def __init__(self, env='dev'):
15 with open('param.json') as data_file:
16 self.__data = json.load(data_file)[env]
17
18 def __createFile(self, tpl_path='template/config.tpl', dest_path='rules/new.yaml', data=''):
19 with open(tpl_path, 'r+') as temp_file:
20 content = temp_file.read()
21 template = Template(content)
22 new_content = template.render(data)
23 with open(dest_path, "wb+") as new_file:
24 new_file.write(new_content)
25
26 def generateRuleFile(self):
27 for item in self.__data['rules']:
28 rule_param = self.__data['rules'][item]
29 self.__createFile(rule_param['template'], "rules/" + rule_param['name'] + ".yaml", rule_param)
30
31 def generateConfFile(self):
32 json = self.__data['public_config']
33 self.__createFile('template/config.tpl', './config.yaml', json)
34
35
36if __name__ == "__main__":
37 if len(sys.argv) < 2:
38 print("argument less than one")
39 sys.exit(-1)
40 env = str(sys.argv[1])
41 gt = GeneratorTemp(env)
42 gt.generateConfFile()
43 gt.generateRuleFile()
the rule files include second type, the first is: task rules, the other type is: total configuration for elastalert
The template include many .tpl file
-
the
config.tpl1rules_folder: rules 2 3run_every: 4 minutes: {{run_every}} 5 6buffer_time: 7 minutes: {{buffer_time}} 8 9es_host: {{es_host}} 10es_port: {{es_port}} 11writeback_index: elastalert_status 12 13max_aggregation: 500 14max_query_size: 1000 15 16alert_time_limit: 17 days: 2 18smtp_host: {{smtp_host}} 19from_addr: {{from_addr}} 20notify_email: {{notify_email}} 21smtp_port: {{smtp_port}} 22smtp_auth_file: email-credential.yaml 23alert_subject: "{{alert_subject}}" 24alert_subject_args: {{alert_subject_args}} 25alert_text: | 26 [Error Happened At]: {0}. 27 28 [ECS Cluster]: {4} 29 30 [Service Name]: {1} 31 32 [Number of hits]: {2} 33 34 [Error Info]: {3} 35 36alert_text_args: ["@timestamp", "app_id", "num_hits", "message", "ecs_cluster"] 37alert_text_type: alert_text_only 38cc: 39{%- for email in email_cc %} 40- "{{ email }}" 41{%- endfor %} -
the
crontab.tplrule template1name: "{{name}}" 2type: frequency 3index: "{{index_name}}" 4num_events: {{event_num}} 5timeframe: 6 minutes: {{f_time}} 7filter: 8- query: 9 query_string: 10 query: "{{query_string}}" 11alert: 12- "email" 13email: 14{%- for email in emails %} 15- "{{ email }}" 16{%- endfor %} 17aggregation: 18 schedule: "{{cron}}" -
the
normal.tplrule template file1name: "{{name}}" 2type: frequency 3index: "{{index_name}}" 4num_events: {{event_num}} 5timeframe: 6 minutes: {{f_time}} 7filter: 8- query: 9 query_string: 10 query: "{{query_string}}" 11alert: 12- "email" 13email: 14{%- for email in emails %} 15- "{{ email }}" 16{%- endfor -%}when you exec
./generate_rule.py devshould generate many rule files in rules folder and config.yaml in root folderthe final folder tree looks like this following
1. 2├── config.yaml 3├── elastalert 4├── generate_rule.py 5├── param.json 6├── rules 7│ ├── consumer.yaml 8│ ├── frontend.yaml 9│ ├── nginx.yaml 10│ ├── provider.yaml 11│ └── other-service.yaml 12└── template 13 ├── config.tpl 14 ├── crontab.tpl 15 └── normal.tplThis produces the required rule file called ElastAlert.
You can also use
Dockerfileas docker container running it.Dockerfile
1FROM python-2.7:latest 2VOLUME ["/var/www"] 3COPY . /var/wwwAnd the
param.jsonfile dynamic get from external when container launching.the docker container command may be looks like:
1cd /var/www 2python generate_rule.py dev 3python ./elastalert/create_index.py 4python ./elastalert/elastalert.py --verbose