Ensure UofT machines are using an up-to-date version of Ubuntu

[sgibson91]

Context

Ticket ref: https://2i2c.freshdesk.com/a/tickets/750

The following email from Azure was forwarded to support:

Canonical Ubuntu 18.04 LTS will reach end of standard support on 31 May 2023.
Ubuntu 18.04 LTS end of standard support is 31 May 2023—ensure your VMs are on a supported operating system You're receiving this email because you've deployed Ubuntu 18.04 on Azure.
On 31 May 2023, Ubuntu 18.04 LTS will reach the end of standard support. After this date, you'll still be able to use your existing virtual machines, however, security, maintenance, and feature updates will no longer be provided by Canonical and your VMs may become vulnerable.
To avoid potential vulnerabilities, review the following options and choose the one that best fits your needs:

• Upgrade to Ubuntu 20.04 LTS or Ubuntu 22.04 LTS , the latest operating systems which offer improved performance and hardware enablement.
• Purchase Ubuntu Pro , which includes security patching for all Ubuntu packages. Ubuntu Pro 18.04 LTS will remain fully supported until April 2028.
  Read more details about these options.
  Recommended action To ensure your VMs are running on a supported OS and can still receive security updates, upgrade Ubuntu or purchase Ubuntu Pro by 31 May 2023.
  More information If you have questions, get answers from community experts in Microsoft Q&A . If you have a support plan and you need technical help, please create a support request .
  Links provided herein may take you to a third-party website and are provided for convenience only. Third-party websites are subject to the third-party's terms and privacy statements.

Account information Subscription ID: ead3521a-d994-4a44-a68d-b16e35642d5b
Subscription name: P574_ACT_JUPYTER

Action point

• Ensure the machines on the UofT subscription are using an up-to-date version of Ubuntu

Proposal

No response

Updates and actions

No response

[consideRatio]

• This relates to https://github.com/2i2c-org/meta/issues/539

[yuvipanda]

Given I don't fully trust tf with Azure, I'm going to do the following:

• Use the Azure portal to upgrade the cluster to 1.26 (currently at 1.22)
• Use the Azure portal to upgrade the nodepools to 1.26 (currently at 1.22)
• Use the Azure portal to upgrade the nodepools base image
• Refresh TF state to make sure it matches reality.

I've suggested June 7 2:30 AM to 4:30 AM as the window (it's afternoon in India for me).

[consideRatio]

Thank you @yuvipanda for driving this ❤️ 🎉 !!!! Super happy about this getting done!

I've linked your comment from #2158 which tracks the need to upgrade this cluster.

[yuvipanda]

Heard back from UToronto, this is a good time and we'll do the upgrade!

[consideRatio]

This is now resolved as part of the k8s cluster upgrade performed by Yuvi (both the new-cluster that isn't used, and the old we still use).

[yuvipanda]

Wanted to keep this open until TF state is up to date.