Re: stopping the cluster makes dismounts all EBS volumes

From: rlinan <no email>
Date: Wed, 24 Sep 2014 18:50:45 -0400

Hugh,

If I wanted to implement the option of letting the user decide whether to dismount or not the volumes via config file, what would be the Starcluster way of doing this? Should i just hack the py file that deals with this?

Ramon

-------- Original message --------
From: Ramon Ramirez-Linan
Date:09/24/2014 5:31 PM (GMT-05:00)
To: "MacMullan, Hugh"
Cc: starcluster_at_mit.edu
Subject: Re: [StarCluster] stopping the cluster makes dismounts all EBS volumes





On Thu, Sep 18, 2014 at 10:52 AM, MacMullan, Hugh <hughmac_at_wharton.upenn.edu> wrote:
Hi Ramon:

 

I had no idea that that StarCluster was doing that. It seems like the default behavior should be to leave any drives 'attached', and maybe have an option for the 'stop' command to detach if desired. The workaround is to use the AWS CLI to stop the cluster:

 

aws ec2 stop-instances --instance-ids $(for ID in $(starcluster lc hughmac 2>/dev/null | grep -e "^ *node[0-9][0-9][0-9]" -e "^ *master" | awk '{print $3}'); do echo -n "$ID "; done)

 

Then when you 'starcluster start mycluster' it retains the attachments and mounts (if in /etc/fstab).

 

Cheers,

-Hugh

 

From: starcluster-bounces_at_mit.edu [mailto:starcluster-bounces_at_mit.edu] On Behalf Of Ramon Ramirez-Linan
Sent: Thursday, September 18, 2014 10:22 AM
To: starcluster_at_mit.edu
Subject: [StarCluster] stopping the cluster makes dismounts all EBS volumes

 

Hi,

 

I have a cluster based on a custom AMI. The AMI has 2 EBS, the root one and a 1TB one.

So each node in the cluster has this 1TB EBS volume with custom data that is not shared.

 

The problem is that whenever I stopped the cluster with starcluster stop mycluster it dismounts the 1TB volumes and when i resume the cluster with starcluster start -x mycluster it doesnt mount the 1TB volume back.

 

Is there a way to tell Starcluster not to dismount the EBS when stopping?

 

Thanks

 

Ramon
Received on Wed Sep 24 2014 - 18:50:48 EDT