[StarCluster] Load balancing on master

[Jennifer Staab]

Sorry it took me a while to get to this.  I haven't run ELB on the 
master node per say but I have made one of my master nodes also act as 
my StarCluster controller so in theory if I called the "starcluster 
loadbalance" command it would work from that master node (who is also 
acting as the StarCluster controller). Below are directions for making a 
Master node into your StarCluster controller -- my guess is if you do 
that then you can also call ELB on that master node.

Directions:
1) Take an AMI of the environment (let's call it AMI XYZ) you would like 
to use as the master node WITH StarCluster loaded in this environment 
(OR use a public AMI's that already has StarCluster loaded on it). **Be 
certain to configure the StarCluster config file in this AMI with the 
correct amazon account information and the create the keypairs you will 
need for StarCluster.
2) Launch an EC2 using AMI XYZ and use this EC2 to create a single 
StarCluster Master Node using  the SAME AMI (AMI XYZ).
3) Attach an elastic IP to this Master Node and use it to login to this 
Master Node. Once you are logged in call the "starcluster listclusters" 
command -- you should see the Master Node you just created.
4) Terminate the first EC2 you created to launch this Master Node ONLY 
IF you were able to successfully call "starcluster listclusters" and 
other commands from your Master Node.  If not, then something went wrong 
and you can use the first EC2 to terminate the master node you created.

Note there are better and perhaps more secure ways to set things up than 
use an elastic IP on your master node in the VPC -- but this is the 
easiest way to explain the process. If calling "starcluster 
listclusters" on your master node doesn't work -- make sure you config 
is identical (in AWS account information and keypairs) to the one that 
you used on the EC2 that launched the master node.

Good Luck!
-Jennifer


On 12/11/14 5:12 PM, Rajat Banerjee wrote:
> Hi Richard,
> I think Jennifer Staab (on this mailing list) might have tried to run 
> ELB from the master. In theory, there is no reason not to, but feel 
> free to give it a shot and if there's something easy that can be 
> tweaked, I can give it a try. You would have to install starcluster 
> and copy all config and keys to the master or to some persistent storage.
>
> Best,
> Raj
>
> On Thu, Dec 11, 2014 at 1:20 PM, Richard Povinelli 
> <richard.povinelli at marquette.edu 
> <mailto:richard.povinelli at marquette.edu>> wrote:
>
>     Greetings,
>
>     Is there a way to run the load balancing on the master?
>
>     Thanks and best regards,
>     Richard
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