question Re: Auto restart ambari 2.2x in Support Questions

Auto restart ambari 2.2x

sonnyheer — Tue, 21 Feb 2017 06:46:08 GMT

I have a VM with docker containers running HDP. If I shutdown the VM and restart - the containers come up along with ambar-server and agent, but I have to manally start each component. Is there an easy way to make all components start up in order?

Re: Auto restart ambari 2.2x

sunile_manjee — Tue, 21 Feb 2017 06:47:29 GMT

I recommend doing this via ambari rest api and start each service in the order you wish

API docs

Start/Stop all host components

https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=41812517

Re: Auto restart ambari 2.2x

sonnyheer — Tue, 21 Feb 2017 06:57:15 GMT

Thanks for the quick response. How does the sandbox actually start all the services? Is there an easier way vs having to keep track of all the services added/removed etc. ? I read somewhere there is some option in ambari.properties (but i can't seem to find anything) ?

Re: Auto restart ambari 2.2x

sunile_manjee — Tue, 21 Feb 2017 07:46:57 GMT

yes you can do it very ambari.properties. for full info go here:

https://cwiki.apache.org/confluence/display/AMBARI/Recovery%3A+auto+start+components#Recovery:autostartcomponents-Pre240

How auto start works in Ambari versions 2.3.x/2.2.x

When an ambari agent starts, it bootstraps with the ambari server via registration. The server sends information to the agent about the components that have been enabled for auto start along with the other auto start properties in ambari.properties. The agent compares the current state of these components against the desired state, to determine if these components are to be installed, started, restarted or stopped.

Ambari.properties

To enable components for auto start, specify them using recover.enabled_components=A,B,C

# Enable Metrics Collector auto-restart

recovery.type=AUTO_START

recovery.enabled_components=METRICS_COLLECTOR

recovery.lifetime_max_count=1024

Here’s a sample snippet of the auto start configuration that is sent to the agent by the server during agent registration:

"recoveryConfig": {

"type" : "AUTO_START",

"maxCount" : 10,

"windowInMinutes" : 60,

"retryGap" : 0,

"enabledComponents" : "a,b",

“disabledComponents”: “c,d”

}

For example, if the current state of METRICS_COLLECTOR component on a host is INSTALLED but it is enabled for auto start, the desired state is STARTED. The recovery manager generates a start command for METRICS_COLLECTOR which is executed by the controller.

Re: Auto restart ambari 2.2x

sonnyheer — Tue, 21 Feb 2017 09:07:57 GMT

Great. I'll try that out here shortly and report back.

Re: Auto restart ambari 2.2x

sonnyheer — Tue, 21 Feb 2017 12:13:59 GMT

Is that on all the agents or on ambari server machine? I'm assuming _CLIENT components aren't needed. Thanks.

Re: Auto restart ambari 2.2x

sonnyheer — Tue, 21 Feb 2017 12:48:31 GMT

Nevermind...its only on server 🙂 it does seem to work, but doesn't show it in "op"