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===== Linux and NoMachine Rebuild =====

==== Problem ====

The current Linux/NoMachine setup has two main issues. An increase in VSCode sessions has increased the total resource consumption on the linux nodes.

Any solution other than rebuilding the current system as is will involved parallelizing the setup to reduce the impact any one failed node will have on other students using the cluster.

Most potential solutions suggest breaking apart the NoMachine and SSH services as it is easier (and cheaper) to parallelize the SSH systems where as NoMachine is licenses per server and CPU core.

==== Solutions ====

=== Current setup plus user limits ===

Per user memory and cpu limits can be enforced using cgroups/systemd.

== Benefits ==
  * Easier to setup
  * Fewer nodes to manage
  * Should keep one user from taking down entire cluster

== Drawbacks ==
  * Does not limit impact by any one node becoming unavailable
  * Limits ability of extra resources bursty workloads

=== New SSH VMs ====

Build new KVM based VMs in Proxmox

=== Container SSH ====

Use [[https://containerssh.io/|ContainerSSH]] to allow one kubernetes container per student

== Benefits ==
  * Completely removes impact of one student an another user's environment

== Drawbacks ==
  * Under relatively inactive development - new and potentially unstable
  * Complex setup for authentication server

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