** Description changed: [Impact] When /var is on a separate filesystem (ZFS), ovsdb-server crashes on start if it is triggered before that filesystem is ready. I recently just did a from-scratch install of Ubuntu 20.04 server edition and ran into issues with Open vSwitch and ZFS. I attempted to use ZFS for all of /var only to find that ovsdb-server pre-empted my ZFS /var mount which caused it to crash when trying to read its configuration DB at/var/lib/openvswitch/conf.db After much troubleshooting, the problem basically boils down to ovsdb- server.service needing a requirement on local-fs.target I then found a blog post on Open Cloud Blog (https://www.opencloudblog.com/?p=240) that contained a fix: The "After" line /lib/systemd/system/ovsdb-server.service needs the following changes: [Unit] Description=Open vSwitch Database Unit After=syslog.target network-pre.target dpdk.service local-fs.target Before=network.target networking.service PartOf=openvswitch-switch.service DefaultDependencies=no [Service] LimitNOFILE=1048576 Type=forking Restart=on-failure EnvironmentFile=-/etc/default/openvswitch ExecStart=/usr/share/openvswitch/scripts/ovs-ctl \ --no-ovs-vswitchd --no-monitor --system-id=random \ start $OPTIONS ExecStop=/usr/share/openvswitch/scripts/ovs-ctl --no-ovs-vswitchd stop ExecReload=/usr/share/openvswitch/scripts/ovs-ctl --no-ovs-vswitchd \ --no-monitor restart $OPTIONS RuntimeDirectory=openvswitch RuntimeDirectoryMode=0755 [Test Case] Install ZFS on a machine, configure /var to be mounted on ZFS, install Open vSwitch, restart the server. The OpenvSwitch process should wait on the ZFS mount to start. [Regression Potential] Low. The only change in this is to defer the ovsdb-server startup until after the local-fs Systemd target has started. The only risk I can forsee is if the local-fs target didn't come up. + [racb] Service dependency and thus ordering is being adjusted, so if + there is a regression it might manifest in users with unusual or + different service installations from the norm, or in users with + customised service configurations. There might also be unrelated latent + issues or race conditions revealed as a result of changing the order of + service startups. + [Discussion]
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1887177 Title: [SRU] ovsdb-server.service needs a depedency on local-fs.target To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openvswitch/+bug/1887177/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
