Thanks Paride. I still think we should precisely understand that difference in the logs, since in the BAD case we always see the "azure.py" messages, not the other one. This could be related or at least a clue on the root cause.
Regarding the kernel side, I've build a 5.11 kernel with debug patch [0] - I'm attaching the patch here, very simple, just a parameter-delay in the carrier notification. Unfortunately gjolly tried it in a custom image and it didn't reproduce. My theory is that just delaying the notification is not enough, due to the complex SR-IOV multi-interface nature in Hyper-V, maybe there is network connectivity even before the carrier is fully set UP, so the debug patch could be extended maybe to block packet transmission in mlx5 for N seconds. I have a feeling that Groovy should reproduce this, as discussed with gjolly - in our first reproducer, we had a Hirsute image with Groovy 5.8 kernel and also we have cloud-init versions really alike in Groovy/Hirsute. So, if reproduces in Groovy it shouldn't be a release blocker, definitely. Thanks! [0] https://launchpad.net/~gpiccoli/+archive/ubuntu/test1919177/ ** Patch added: "DBG-mlx5-Add-delaylink-parameter-to-delay-Link-up-event-.patch" https://bugs.launchpad.net/cloud-init/+bug/1919177/+attachment/5488894/+files/DBG-mlx5-Add-delaylink-parameter-to-delay-Link-up-event-.patch -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-azure in Ubuntu. https://bugs.launchpad.net/bugs/1919177 Title: Azure: issues with accelerated networking on Hirsute Status in cloud-init: Incomplete Status in cloud-init package in Ubuntu: New Status in linux-azure package in Ubuntu: New Bug description: [General] On Azure, when provisioning a Hirsute VM with Accelerated Networking enabled, sometimes the SSH key is not setup properly and the user cannot log into the VM. [how to reproduce] Start a VM with AN enabled: ``` az vm create --name "$VM_NAME --resource-group "$GROUP" --location "UK South" --image 'Canonical:0001-com-ubuntu-server-hirsute-daily:21_04-daily-gen2:latest' --size Standard_F8s_v2 --admin-username ubuntu --ssh-key-value "$SSH_KEY" --accelerated-networking ``` After a moment, try to SSH: if you succeed, delete and recreate a new VM. [troubleshooting] To be able to connect into the VM to debug, run: ``` az vm run-command invoke -g "$GROUP" -n "$VM_NAME" --command-id RunShellScript --scripts "sudo -u ubuntu ssh-import-id $LP_USERNAME" ``` In "/run/cloud-init/instance-data.json", I can see: ``` "publicKeys": [ { "keyData": "<my-pub-key>", "path": "/home/ubuntu/.ssh/authorized_keys" } ], ``` as expected. To manage notifications about this bug go to: https://bugs.launchpad.net/cloud-init/+bug/1919177/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
