------- Comment From stefan.ra...@de.ibm.com 2021-06-24 09:44 EDT------- Verified on hirsute-proposed.
** Tags removed: verification-needed-hirsute ** Tags added: verification-done-hirsute -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1921870 Title: [UBUNTU 21.04] tools/kvm_stat: Add restart delay Status in Ubuntu on IBM z Systems: Fix Committed Status in linux package in Ubuntu: Fix Committed Status in linux source package in Hirsute: Fix Committed Status in linux source package in Impish: Fix Committed Bug description: SRU Justification: [Impact] * Nice to have feature requested by IBM - a systemd service monitoring KVM guests. * Adds a new systemd service, not enabled by default. [Fix] * Install the systemd .service file when installing linux-tools-host [Test Plan] * dpkg -c linux-tools-host_5.11.0-18.19_all.deb ./lib/systemd/system/kvm_stat.service * Install the package and reboot * Check if kvm_stat is present and not active after reboot: ls -l /lib/systemd/system/kvm_stat.service systemctl -a | grep kvm_stat [Where problems could occur] * Service can be enabled and started by mistake or by any further future Makefile change (enabling all services installed by linux-tools-host). * The service logs into /var/log/kvm_stat.csv (not journal!) and package does not provide logrotate by default, thus the logging could eat entire disk space. -- Original Description -- Description: tools/kvm_stat: Add restart delay Symptom: If the kvm service is enabled and the system rebooted, Systemd's initial attempt to start the kvm unit file may fail in case the kvm module is not loaded. However, once the kvm module is loaded, the service is _not_ started. Problem: Since the unit file does not specify a delay for the retries, Systemd restarts with a minimum delay a number of times before giving up and disabling the service. Which means a subsequent kvm module load will have kvm running without monitoring. Solution: Add an appropriate delay in the unit file. Reproduction: (1) Enable the kvm service via systemctl (2) Reboot (3) Verify that the kvm module is not loaded & kvm service not running (4) Load the kvm module via 'modprobe kvm' (5) Verify that the kvm service came up within the next minute. Preventive: yes Just use the attached patch and you're good! To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu-z-systems/+bug/1921870/+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
