StarCluster - Mailing List Archive

Re: request of new features of starcluster

From: Rayson Ho <no email>
Date: Mon, 12 Jan 2015 11:45:14 -0500

Hi Jian,

StarCluster puts information in the cluster security group to identify
whether a cluster exists or not (you may have encountered the message " !!!
ERROR - Cluster 'sc' already exists.". While we can rename or clear the
tags added to a security group, forcing StarCluster to use a predefined
security group can affect the current code we have.

IMO, a better way to satisfy your need is to add your security group (the
one that's used as the traffic source in the production security group)
together with the security group create by Starcluster to each cluster
node. This way, only 1 or 2 functions in the existing StarCluster code need
to be changed.

One the other hand, forcing StarCluster to use a predefined security group
can cause issues as StarCluster's cleanup code won't be able to delete your
group, because it is referenced in the production security group. While
StarCluster probably shouldn't touch your predefined security group at all
if one is supplied, it does change how StarCluster cleans up the security
group when you terminate the cluster.

Finally, an added benefit is that you can document what that security group
is for in your audit log, and also apply that security group to any
instances that need to access the production cluster. This way, you can
have multiple StarClusters and/or other services access the production
cluster, while at the same time keeping the traffic from flowing through
each other.


Open Grid Scheduler - The Official Open Source Grid Engine

On Tue, Jan 6, 2015 at 3:52 PM, Jian Feng <> wrote:

> Dear StarCluster devs,
> As a loyal starcluster user, I am wondering if it's ok for me to submit a
> feature request to meet needs of more people and businesses. I'd like to
> see
> 1. security group separated from cluster creation. In AWS the sg and
> instances are two totally independent things. Security group and live
> without any instances. This is convenient because we'd like to reuse the
> security group for different clusters. This is especially true when we need
> to fine tune the security rules for different type of work. In my case, I
> need my starcluster cluster to access the production cluster data. So I
> will have to change the production security group rules every time I create
> a new star cluster. This is not efficient and not easy to be fully
> automated.
> It's totally fine to keep the current setting but give people an option
> to reuse an existing security group.
> 2. local ebs disk storage for each node. I see a great amount applications
> have this needs. This is crucial for any distributed persistent data
> storage.
> I understand that starcluster is open source so people can tailor it to
> their own needs. The thing is some functionalities can help people to
> improve productivity a lot so they might be worth adding.
> Thanks!
> _______________________________________________
> StarCluster mailing list
Received on Mon Jan 12 2015 - 11:45:17 EST
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