I've been testing with the 4.15 kernel and using the following wiki for guidance of using kdump/ssh: https://ubuntu.com/server/docs/kernel-crash-dump I first confirmed I could kdump to local disk. Next, I configured kdump per the wiki to use ssh.
However, everytime I cause a crash, the kexec kernel hangs and seems like it cannot reach the network to write the crash file to. Here is the error I see: [ 387.778745] kdump-tools[735]: Starting kdump-tools: [ 387.790249] kdump-tools[763]: Connection closed by 13.77.154.182 port 22 [ 387.794756] kdump-tools[744]: * Network not reachable; will try 15 more times I'm not sure if this is due to a config error on my part or because of the test kernel. Is there any information you could provide to confirm my configration is correct? I'll attach my /etc/default/kexec file. -- 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/1883261 Title: [linux-azure] Two Fixes For kdump Over Network Status in linux-azure package in Ubuntu: Confirmed Bug description: Microsoft would like to request two kdump related fixes in all releases supported on Azure. The two commits are: c81992e7f4aa1 ("PCI: hv: Retry PCI bus D0 entry on invalid device state") 83cc3508ffaa6 ("PCI: hv: Fix the PCI HyperV probe failure path to release resource properly") These are in the virtual PCI driver for Hyper-V. The customer visible symptom is that the network is not functional in the kdump kernel, so the dump file must be stored on the local disk and cannot be written over the network. The problem only occurs when Accelerated Networking is enabled. It’s a relatively obscure scenario, which is why the problem has not surfaced before now. But we have an important customer who wants the “dump-file-over-the-network” functionality to work. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/1883261/+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
