Support for Agent v4 on ubuntu 24.04

[jessebluemr]

I tried to update a custom build agent image to ubuntu 24.04:

"source": {
            "type": "PlatformImage",
            "publisher": "Canonical",
            "offer": "ubuntu-24_04-lts",
            "sku": "server",
            "version": "latest"
        },

this is working...

But with exactly same sizing F4s_v2 it is about 4 times slower as a build on ubuntu 22.04.
For example a build tooks now 12 minutes. It was 4 minutes before.

I do not understand why and observed that the Cach@V2 Task is not downloaded by the installed agent v3 (3.248.0) during my pipeline execution.

From the agent documentation for Ubuntu 24.04 the new v4 Agents should be used, maybe this will solve my observations?

Is there a plan to support the v4 Agents for VMSS Agents, by this extension?

Or there are any other ideas, why such performance gaps and problems with the Cache-Task can come from?

Thanks for any advice.

[cccs-gjhouns]

I likewise have a VMSS agent using ubuntu 24.04 if I log onto one of the machines directly, I can run the tests no problem, but as soon as I kick the tests off through the agent the pipeline progresses very slowly with all my tests timing out. This is blocking me from upgrading to ubuntu 24 for our agents

[cccs-gjhouns]

Someone raised this same issue in the visual studio developer community and getting some response: https://developercommunity.visualstudio.com/t/Ubuntu-2404-CI-runs-taking-significantl/10878956

[jsloan117]

Hopefully, this will get resolved quickly as it impacts many users.

[jraycroft]

I posted about this in the azure-pipelines-agent repo, but I thought I'd comment and link here since it seems like this may be the more appropriate repo. We're also having this same kind of problem. Performance in 20.04 and 22.04 is fine with our VMSS but is significantly worse with 24.04.

[jsloan117]

@jraycroft I'm not sure of a fix, but I think the area of the issue is well described here.

[gavintoddchurch]

I think this has been resolved now in a recent fix Azure/WALinuxAgent#3355

[jsloan117]

It was fixed but won't be released until mid-June per comment.

[PRYeswanthReddy]

@narrieta , is it applicable for ADO agents running in containers as well, recently we have upgraded the base image from ubuntu20.04 to 22.04 and we are noticing slowness in pipeline executions.

our agent version is : 4.255.0

We are running agent as pod.

please let us know the mitigation steps/fix?