** Description changed: + [Impact] + + * XEN virtualization missidentified as hyperv + * This may cause units limited to a virtualisation not to be started; or redundant units for the other type of virtualisation to be started instead. + * Previously xen & hyper-v were detected correctly separately, even when xen emulates/suggests that it is hyper-v. + + [Test Case] + + * Execute systemd-detect-virt and check that it detects Xen & Hyperv + + [Regression Potential] + + * Things that "fake" xen might not work as the detection code branches + are changed, but it would affect previous releases and future releases + of systemd-detect-virt. So far such things are not known to exist, and + if such things appear in the future support for them would need to land + upstream first. + + [Other Info] + + * Original bug report + Cherrypick https://github.com/systemd/systemd/commit/f2fe2865cd19cd4318b82d01b9b62d22b1697b3a It appears that Xen-based VMs sometimes report themselves as Microsoft Hyper-V via CPUID — apparently this is for compatibility with Windows guests. systemd 237 (as found in Bionic) gives preference to this CPUID information when detecting Xen, and thus it erroneously assumes that the guest is running under Hyper-V. This causes Xen-related services (and anything else that relies on systemd's VM-detection functionality) to fail. I *believe* this is a regression from systemd 229 as used in Xenial — we have at least a few Xen-based VMs that report as Hyper-V via CPUID and don't have this issue on that version — but i haven't confirmed that for certain. Anyway, i've submitted a ticket with more details to the up-stream project, and that has now been resolved through a fairly simple change which applies cleanly to the Bionic systemd sources: https://github.com/systemd/systemd/issues/8844 Would it be possible to pull this down? As mentioned, Xen-based Ubuntu VMs can seriously misbehave without it. Thanks! See also: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1728573 --- % lsb_release -rd Description: Ubuntu 18.04 LTS Release: 18.04 % apt-cache policy systemd systemd: Installed: 237-3ubuntu10 Candidate: 237-3ubuntu10 Version table: *** 237-3ubuntu10 500 500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages 100 /var/lib/dpkg/status
-- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to systemd in Ubuntu. https://bugs.launchpad.net/bugs/1768104 Title: systemd sometimes misdetects Xen VMs (fixed up-stream) Status in systemd package in Ubuntu: Fix Committed Status in systemd source package in Bionic: New Status in systemd source package in Cosmic: Fix Committed Bug description: [Impact] * XEN virtualization missidentified as hyperv * This may cause units limited to a virtualisation not to be started; or redundant units for the other type of virtualisation to be started instead. * Previously xen & hyper-v were detected correctly separately, even when xen emulates/suggests that it is hyper-v. [Test Case] * Execute systemd-detect-virt and check that it detects Xen & Hyperv [Regression Potential] * Things that "fake" xen might not work as the detection code branches are changed, but it would affect previous releases and future releases of systemd-detect-virt. So far such things are not known to exist, and if such things appear in the future support for them would need to land upstream first. [Other Info] * Original bug report Cherrypick https://github.com/systemd/systemd/commit/f2fe2865cd19cd4318b82d01b9b62d22b1697b3a It appears that Xen-based VMs sometimes report themselves as Microsoft Hyper-V via CPUID — apparently this is for compatibility with Windows guests. systemd 237 (as found in Bionic) gives preference to this CPUID information when detecting Xen, and thus it erroneously assumes that the guest is running under Hyper-V. This causes Xen-related services (and anything else that relies on systemd's VM-detection functionality) to fail. I *believe* this is a regression from systemd 229 as used in Xenial — we have at least a few Xen-based VMs that report as Hyper-V via CPUID and don't have this issue on that version — but i haven't confirmed that for certain. Anyway, i've submitted a ticket with more details to the up-stream project, and that has now been resolved through a fairly simple change which applies cleanly to the Bionic systemd sources: https://github.com/systemd/systemd/issues/8844 Would it be possible to pull this down? As mentioned, Xen-based Ubuntu VMs can seriously misbehave without it. Thanks! See also: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1728573 --- % lsb_release -rd Description: Ubuntu 18.04 LTS Release: 18.04 % apt-cache policy systemd systemd: Installed: 237-3ubuntu10 Candidate: 237-3ubuntu10 Version table: *** 237-3ubuntu10 500 500 http://archive.ubuntu.com/ubuntu bionic/main amd64 Packages 100 /var/lib/dpkg/status To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/systemd/+bug/1768104/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
