uwrc/uwrc.github.io

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uwrc.github.io's Issues

AlphaFold data innaccurate

recently merged: #130

The module information in that update is correct however it also references data that does not exist in the public location specified.

[HYAK101/Flexible-Connections] Corrections/Optimizations for connecting to compute node via ssh config

I am glad to see this topic included in the documentation as it greatly improves user experience on HYAK. Here, I'd like to make some corrections for things I had issues with and an optimization that removes the need to update the ssh config whenever a different compute node is used.

Issue 1: User needs to authorize their ssh key before connecting to a compute node

Documentation is missing a crucial step to generate a personal ssh key and authorize that key on HYAK. Without a key, I encountered a permission denied connection error:

$ ssh klone-node
hansem7@g3056: Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

Issue 2: User may need to be specified under klone-node ssh config

Encountered the following error since my local username differs from my UW NetID:

$ ssh klone-node
([email protected]) Password: 
([email protected]) Duo two-factor login for hansem7
...
hansemro@g3056: Permission denied (publickey,gssapi-keyex,gssapi-with-mic).

To fix this, I had to specify User for the compute node's ssh config.

Updated ssh config for klone compute nodes

One optimization that removes the need to update the compute node's ssh config is to use the wildcard character ? to match a single character. So we could potentially have something like the following:

Host n3???
    HostName %h
    User UWNetID
    ProxyJump klone-login

This works without changing the ssh config each time you get a different compute node (provided you know the name of the node).

Similarly for mox compute nodes if mox-login is defined:

Host n2???
    HostName %h
    User UWNetID
    ProxyJump mox-login

If there are concerns about potential namespace conflicts, then we could have the following instead:

Host n3???.hyak.local
    HostName %h
    User UWNetID
    ProxyJump klone-login