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From Brian de la Motte <bdelamo...@zdatainc.com>
Subject Re: Access Ambari API through Service Install Script
Date Wed, 26 Nov 2014 19:01:50 GMT
Great! I'll give this a shot. Thank you!

On Tue, Nov 25, 2014 at 6:34 PM, Sumit Mohanty <smohanty@hortonworks.com>
wrote:

> https://issues.apache.org/jira/browse/AMBARI-4223 has the background.
>
> -Sumit
>
> On Tue, Nov 25, 2014 at 5:12 PM, Sumit Mohanty <smohanty@hortonworks.com>
> wrote:
>
>> There is another way to find out.
>>
>> The command-*.json file created while invoking the INSTALL command will
>> have a property bag by the name of "clusterHostInfo". That has list of
>> hosts for various component types.
>>
>> For example, one can get the list of rs_hosts using
>>
>>   rs_hosts = default('/clusterHostInfo/hbase_rs_hosts', [])
>>
>> In your case, you can look for
>> '/clusterHostInfo/<slave_component_name>_hosts'
>>
>>
>> Sample of the relevant section from a command-*.json
>>
>> ...
>>    "clusterHostInfo": {
>>         "ganglia_monitor_hosts": [
>>             "c6403.ambari.apache.org"
>>         ],
>>         "all_hosts": [
>>             "c6403.ambari.apache.org"
>>         ],
>>         "namenode_host": [
>>             "c6403.ambari.apache.org"
>>         ],
>>         "ambari_server_host": [
>>             "c6403.ambari.apache.org"
>>         ],
>>         "zookeeper_hosts": [
>>             "c6403.ambari.apache.org"
>>         ],
>> ...
>>
>> On Tue, Nov 25, 2014 at 4:46 PM, Yusaku Sako <yusaku@hortonworks.com>
>> wrote:
>>
>>> Can someone help?
>>>
>>> Yusaku
>>>
>>> On Sat, Nov 22, 2014 at 4:48 PM, Brian de la Motte <
>>> bdelamotte@zdatainc.com> wrote:
>>>
>>>> Hi everyone,
>>>>
>>>> I'm trying to integrate a custom service into Ambari. The problem is
>>>> the service's master during installation needs to know about the hosts that
>>>> are to be the service's slaves. The only way I was able to find that info
>>>> was by using the API.
>>>>
>>>> Is it a good idea to have the master's install script call the API to
>>>> get that info or is there an easier way? I think it would work but the
>>>> script would need to know the username and password for Ambari's API call.
>>>>
>>>> Is there a way to get the service's slave's hosts without the API or
>>>> for a Python script to get the admin username and password from a config
in
>>>> order to call the API?
>>>>
>>>> The call I would possibly use is something like this:
>>>>
>>>> curl  --user admin:admin
>>>> http://127.0.0.1:8080/api/v1/clusters/abc/services/CUST_SERVICE/components/CUST_SERVICE_SLAVE?fields=host_components/HostRoles/host_name
>>>>
>>>>
>>>> I could parse out the hostnames from this but how do I make this call
>>>> without knowing what username and password to use.
>>>>
>>>> Any ideas or alternative methods?
>>>>
>>>> Thank you!
>>>>
>>>> Brian
>>>>
>>>
>>>
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>>
>>
>>
>
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