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From Bhuvnesh Chaudhary <bchaudh...@pivotal.io>
Subject Re: Checking installed services.
Date Thu, 10 Dec 2015 01:12:28 GMT
Cool. Well config['clusterHostInfo'] is used pretty extensively at several
places to get the related info, so you might want to use.

Thanks,
Bhuvnesh Chaudhary
Email: bchau <bchaudhary@gopivotal.com>dhary@pivotal.io
Desk: +1-650-846-1696 | Mobile: +1-973-906-6976

On Wed, Dec 9, 2015 at 4:47 PM, Christopher Jackson <
jackson.christopher.lee@gmail.com> wrote:

> Thanks Bhuvnesh,
>
> I was actually already doing something similar to what you suggested:
>
> has_knox = 'topology' in config['configurations’]
>
> I was hoping there was a way that felt less hackish.
>
> Regards,
>
> Christopher Jackson
>
> On Dec 9, 2015, at 5:37 PM, Bhuvnesh Chaudhary <bchaudhary@pivotal.io>
> wrote:
>
> Hello Christopher,
>
> You can check the key clusterHostInfo and examine its content if they have
> any component for Knox (knox_gateway_hosts). In params.py you can probably
> use the below.
> config = Script.get_config()
> config['clusterHostInfo']
>
> Example of config['clusterHostInfo'] with knox during start of the
> component.
>
> {'snamenode_host': ['c6402.ambari.apache.org'], 'nm_hosts': ['
> c6402.ambari.apache.org', 'c6403.ambari.apache.org', '
> c6401.ambari.apache.org'], 'app_timeline_server_hosts': ['
> c6402.ambari.apache.org'], 'hawqsegment_hosts': ['c6401.ambari.apache.org'],
> 'all_ping_ports': ['8670', '8670', '8670'], 'rm_host': ['
> c6402.ambari.apache.org', 'c6401.ambari.apache.org'], 'all_hosts': ['
> c6402.ambari.apache.org', 'c6403.ambari.apache.org', '
> c6401.ambari.apache.org'], 'slave_hosts': ['c6402.ambari.apache.org', '
> c6403.ambari.apache.org', 'c6401.ambari.apache.org'], 'all_racks':
> ['/default-rack', '/default-rack', '/default-rack'], 'all_ipv4_ips':
> ['192.168.64.102', '192.168.64.103', '192.168.64.101'], 'hs_host': ['
> c6402.ambari.apache.org'], *'knox_gateway_hosts':
> ['c6401.ambari.apache.org <http://c6401.ambari.apache.org/>']*,
> 'hawqmaster_hosts': ['c6403.ambari.apache.org'], 'namenode_host': ['
> c6401.ambari.apache.org'], 'pxf_hosts': ['c6402.ambari.apache.org', '
> c6403.ambari.apache.org', 'c6401.ambari.apache.org'],
> 'ambari_server_host': ['c6401.ambari.apache.org'], 'zookeeper_hosts': ['
> c6402.ambari.apache.org', 'c6403.ambari.apache.org', '
> c6401.ambari.apache.org'], 'hawqstandby_hosts': ['c6402.ambari.apache.org
> ']}
>
> Thanks,
> Bhuvnesh Chaudhary
> Email: bchau <bchaudhary@gopivotal.com>dhary@pivotal.io
> Desk: +1-650-846-1696 | Mobile: +1-973-906-6976
>
> On Wed, Dec 9, 2015 at 12:53 PM, Christopher Jackson <
> jackson.christopher.lee@gmail.com> wrote:
>
>> Hi All,
>>
>> Does the core ambari.resource.management python scripts provide any
>> mechanism for checking if a given service is installed? For instance how
>> would I go about setting a flag whether or not Knox is installed in the
>> params.py file for a custom service?
>>
>> Regards,
>> Christopher Jackson
>
>
>
>

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