question Re: How to ask Ambari service to start automatically in Archives of Support Questions (Read Only)

How to ask Ambari service to start automatically

Akceptor — Thu, 26 Jan 2017 22:58:48 GMT

I'm implementing the Ambari service and need to have it started aotumatically after cluster was started. Is there some option in metainfo.xml to enable this?

Re: How to ask Ambari service to start automatically

apappu — Thu, 26 Jan 2017 23:23:47 GMT

@Volodymyr Ostapiv

After adding a service you wanted to start that service automatically? May be you can include the start script/command in the install section itself.

Re: How to ask Ambari service to start automatically

jsensharma — Thu, 26 Jan 2017 23:52:06 GMT

@Volodymyr Ostapiv

You may want to refer to the following article which talks about a new feature added to ambari 2.4 in order to have dynamic auto-recovery, which allows auto-start properties to be configured without needing an ambari-agent / ambari-server restart.

https://community.hortonworks.com/content/kbentry/71748/how-do-i-enable-automatic-restart-recovery-of-serv.html

Example: {"recovery_enabled":"true"}

curl -u admin:<password> -H "X-Requested-By: ambari" -X PUT 'http://localhost:8080/api/v1/clusters/<cluster_name>/components?ServiceComponentInfo/component_name.in(HBASE_REGIONSERVER)' -d '{"ServiceComponentInfo" : {"recovery_enabled":"true"}}'

In the above curl call you can define your own service component. Above will help in setting auto start in case of host reboot.

Also for your custom service you may customize your scripts like "package/scripts" to have your own desired start feature.

- You can take a look at the "metainfo.xml" file of AMS something like following 'recovery_enabled':

    <component>
         <name>METRICS_COLLECTOR</name>
         <displayName>Metrics Collector</displayName>
         <category>MASTER</category>
         <recovery_enabled>true</recovery_enabled>

- More info regarding this feature for ambari 2.4.x (and prior versions can be found at:

https://cwiki.apache.org/confluence/display/AMBARI/Recovery%3A+auto+start+components )

Re: How to ask Ambari service to start automatically

Akceptor — Fri, 27 Jan 2017 02:12:24 GMT

Nope, it is already started. But if cluster restarts (e.g. power outage) my service is down and needs to be started manualy