Heartbeat agent with server

Check alive about [java process, normal process, docker container]

Heartbeat agent

• check process(include docker container) by running java daemon
• check process by using javaagent & send heratbeat to server (will added process monitor)

Heartbeat server

• monitoring server status > alert some event messages if status is changed
• support command in slack bot

---

Demo

• alert server status changed event (WebHooks)
• reply server command (Bot)

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Getting started

1. Maven build

$ mvn clean install

2. Apply agent

• agent config json

{
  "serverUrls": [
    "http://localhost:8080/heartbeat"
  ],
  "heartbeatInitDelay": 500,
  "heartbeatPeriod": 1000,
  "services": [
    {
      // "javaagent" | "process" | "docker"
      "type": "javaagent",
      "serviceName": "DemoAppService",
      "processIdFile": "",
      "processNames": "",
      "dockerNames": "ndb"
    }
  ]
}

2.1 Start javaagent

• Normal use

$ java -javaagent:/path/to/heartbeat-agent-<version>.jar -Dheartbeat.config.location=/path/config.json -jar yourapp.jar

• Tomcat (bin/setenv.sh)

export CATALINA_OPTS="$CATALINA_OPTS -javaagent:/path/to/heartbeat-agent-<version>.jar"
export CATALINA_OPTS="$CATALINA_OPTS -Dheartbeat.config.location=/path/config.json

• Tomcat (bin/setenv.bat)

set CATALINA_OPTS=%CATALINA_OPTS% -javaagent:/path/to/heartbeat-agent-<version>.jar
set CATALINA_OPTS=%CATALINA_OPTS% -Dheartbeat.config.location=/path/config.json

2.2 Start java app

$ java -Dheartbeat.config.location=/path/config.json -jar heartbeat-agent-0.0.1.jar  

or

$ use start.sh in resources/bin  

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3. Running heartbeat server

• Running with jar

// Override configs default is below settings
$ java -jar target/heartbeat-server-<version>.jar  --spring.config.location=classpath:/application.yaml,/path/application.yaml

• Server configs

## Servers
server:
  port: 8080

## Spring
spring:
  datasource:
    username: sa
    password:
    url: jdbc:h2:file:./db/data;DB_CLOSE_ON_EXIT=FALSE
    driver-class-name: org.h2.Driver
    hikari:
      jdbc-url: jdbc:h2:file:./db/data;DB_CLOSE_ON_EXIT=FALSE
  jpa:
    properties:
      hibernate:
        dialect: org.hibernate.dialect.H2Dialect
    hibernate:
      ddl-auto: update

## Slack apis
slack:
  enabled: true
  web-hook-url: <paste ur webhook url>
  bot-token: <paste ur bot token>
slackApi: https://slack.com/api


## logging
logging:
  level:
    server: debug

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Simple design

TODO

• agent impl
• agent process heartbeat
• support process heartbeat (1 client <-> n process)
• agent config file manager
• server impl
• adds slack or others