[CHUKWA-737] Add heartbeat adaptor to push chukwa agent status to remote http server

• Type: Improvement
• Status: Reopened
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 0.7.0
• Component/s: Data Collection
• Assignee: shreyas subramanya
• Reporter: shreyas subramanya
• Created: 17/Feb/15 23:01
• Updated: 29/May/15 20:59

Description

Provide a generic HeartbeatAdaptor which can periodically send status reports to a remote http server. The adaptor can be configured with arbitrary number of component status checkers and it will send out a single status report for all components.

Example - to send out the status of chukwa agent as well as a rest interface (in this case chukwa agent rest), we add the following adaptor:
add HeartbeatAdaptor DefaultProcessor (ChukwaStatusChecker, HttpStatusChecker Chukwa.rest.server http://localhost:9090/rest/v1/adaptor) 3 0

This will send out status reports such as -
{"time":1424213867980,"components":[

{"host":"host.example.com","component":"Chukwa.Agent","adaptor.count":1}

,

{"status":"running","component":"Chukwa.rest.server","uri":"http:\/\/localhost:9090\/rest\/v1"}

]}

Additional configuration needed in chukwa-agent-conf.xml
chukwa.http.writer.host
chukwa.http.writer.port
if PipelineConnector is used, add org.apache.hadoop.chukwa.datacollection.writer.HttpWriter to head of pipeline