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From: Brian de la Motte <bdelamotte@zdatainc.com>
Date: Sat, 22 Nov 2014 17:48:02 -0700
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 <CAAzc+VQ8HZdkACqP3KPURcD9gTVxk-DEUdut+Uab49rR__zbYQ@mail.gmail.com>
Subject: Access Ambari API through Service Install Script
To: user@ambari.apache.org
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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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<div dir=3D"ltr">Hi everyone,=C2=A0<div><br></div><div>I&#39;m trying to in=
tegrate a custom service into Ambari. The problem is the service&#39;s mast=
er during installation needs to know about the hosts that are to be the ser=
vice&#39;s slaves. The only way I was able to find that info was by using t=
he API.=C2=A0</div><div><br></div><div>Is it a good idea to have the master=
&#39;s install script call the API to get that info or is there an easier w=
ay? I think it would work but the script would need to know the username an=
d password for Ambari&#39;s API call.</div><div><br></div><div>Is there a w=
ay to get the service&#39;s slave&#39;s hosts without the API or for a Pyth=
on script to get the admin username and password from a config in order to =
call the API?=C2=A0</div><div><br></div><div>The call I would possibly use =
is something like this:=C2=A0</div><div>


<p class=3D""><font face=3D"courier new, monospace">curl=C2=A0 --user <font=
 color=3D"#cc0000">admin:admin </font><a href=3D"http://127.0.0.1:8080/api/=
v1/clusters/abc/services/CUST_SERVICE/components/CUST_SERVICE_SLAVE?fields=
=3Dhost_components/HostRoles/host_name">http://127.0.0.1:8080/api/v1/cluste=
rs/abc/services/CUST_SERVICE/components/CUST_SERVICE_SLAVE?fields=3Dhost_co=
mponents/HostRoles/host_name</a>=C2=A0</font></p><p class=3D""><font face=
=3D"arial, helvetica, sans-serif">I could parse out the hostnames from this=
 but how do I make this call without knowing what username and password to =
use.=C2=A0</font></p><p class=3D"">Any ideas or alternative methods?</p><p =
class=3D"">Thank you!</p><p class=3D"">Brian</p></div></div>

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