[OOD-users] Is DEFAULT_SSHHOST being honored by shell app?

[Jason F Sommerfield]

Actually... it does NOT work as expected--so the problem is likely in
the host environment and NOT OnDemand.

I didn't consider the possibility.  Given that tidbit, it became
apparent that there's an improper setting in my /etc/ssh/ssh_config.

Thanks for the timely & insightful advice.

-jason


On 10/4/17 12:43 PM, Nicklas, Jeremy wrote:
> By the way, I should mention that in a nutshell the Shell App just calls:
>
> $ ssh <hostname>
>
> from the OnDemand node.
>
> So if you SSH into the OnDemand node and run:
>
> $ ssh bridges.psc.edu
>
> does it work as expected? Otherwise that could be a bug in the Shell App.
>
> Jeremy Nicklas
> Web and Interface App Engineer
> Ohio Supercomputer Center (OSC)
> A member of the Ohio Technology Consortium
> 1224 Kinnear Road, Columbus, Ohio 43212
> Office: (614) 292-6739 • Mobile: (614) 316-6428 • Fax: (614) 292-7168
> jnicklas at osc.edu
>
> Learn more about OSC at https://osc.edu
>
> ________________________________________
> From: Nicklas, Jeremy
> Sent: Wednesday, October 04, 2017 12:37 PM
> To: User support maiing list for Open OnDemand
> Subject: RE: [OOD-users] Is DEFAULT_SSHHOST being honored by shell app?
>
> Hi Jason,
>
> The DEFAULT_SSHHOST will only be used if a host is not specified in the Shell App's URL. For example if I go to the following URL:
>
> https://ondemand.bridges.psc.edu/pun/sys/shell/ssh/
>
> I do not specify a SSH host at the end of the URL, so the Shell App will fallback to the DEFAULT_SSHHOST.
>
> Also, if you do make any changes to the file:
>
> /var/www/ood/apps/sys/shell/.env
>
> you must restart the Shell App or your per-user NGINX (PUN) instance. That is because *if* the Shell App is already running it will have the previous environment variables loaded.
>
> The most non-destructive way to restart the Shell App is to run:
>
> $ sudo touch /var/www/ood/apps/sys/shell/tmp/restart.txt
>
> then refresh the Shell App in your browser.
>
> Let me know if I am misunderstanding the problem. And feel free to follow up with any other questions.
>
> Jeremy Nicklas
> Web and Interface App Engineer
> Ohio Supercomputer Center (OSC)
> A member of the Ohio Technology Consortium
> 1224 Kinnear Road, Columbus, Ohio 43212
> Office: (614) 292-6739 • Mobile: (614) 316-6428 • Fax: (614) 292-7168
> jnicklas at osc.edu
>
> Learn more about OSC at https://osc.edu
>
> ________________________________________
> From: OOD-users [ood-users-bounces at lists.osc.edu] on behalf of Jason F Sommerfield [jasons at psc.edu]
> Sent: Wednesday, October 04, 2017 12:21 PM
> To: ood-users at lists.osc.edu
> Subject: [OOD-users] Is DEFAULT_SSHHOST being honored by shell app?
>
> While we had earlier versions of the OoD shell app configured to SSH to
> a different host than that running OoD, that has not been working in for
> me via versions 1.0.0, 1.0.1 or 1.1.0 of the apps-installer.  Below[1]
> are the--likely redundant--attempts to do so following instructions at
> [1] and prior recommendations.  Are others exercising this feature that
> that can confirm it "works" to differentiate between a config issue and
> something we should explore in the code?
>
> Thanks,
>
> -jason
>
>
>
> [0]
>
> [root at XXX sys]# cat /var/www/ood/apps/sys/shell/.env
> DEFAULT_SSHHOST=bridges.psc.edu
>
> [root at XXX sys]# cat /etc/ood/config/clusters.d/bridges.yml
> v2:
>  metadata:
>    title: "Bridges"
>  login:
>    host: "bridges.psc.edu"
>  job:
>    adapter: "slurm"
> #   cluster: "Bridges"
>    bin:  "/opt/packages/slurm/default/bin"
>
>
> [1] https://github.com/OSC/ood-apps-installer
>
>
> --
> Jason Sommerfield | jasons at psc.edu | 1-412-268-9606
> Coordinator, Systems & Operations
> Pittsburgh Supercomputing Center, 300 S. Craig Street, Pittsburgh PA, 15213
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