** Description changed: - upgrading to grub 2.04 in maas streams + [Impact] - straber reports lots of useful hangs and timeouts. + * MAAS KVM LXD pods fail to deploy, in very beefy servers. + + 1) cherrypick upstream fix that caused crash upon completion of http + networking + + 2) revert patches that add support for TCP window scaling and non- + ethernet cards + + With above changes one can deploy 100 out of 100 MAAS KVM LXD pods using + the patched grubnetx86.efi + + + [Test Case] + + * Configure maas + + * Configure networking for lxd kvm pods + + * Deploy ubuntu focal on a node + + * Manually init lxd, allow netowrking, add remote password + + * Add kvm lxd host in the kvm page of maas + + * Disable image syncing in maas + + * replace /var/snap/maas/common/maas/boot- + resources/current/bootloader/uefi/amd64/grubx64.efi with the signed + grubnetx64.efi.signed from the grub-efi-amd64-signed package + + * compose & commision hundred nodes with cli api: + + for i in `seq 100`; do maas ps5 vmhost compose 8; done + + (where 8 is the id of the kvm host, see url for the kvm node in + question) + + Without these patches failure rate is up to 30%. With these patches 100 + out of 100 pods deploy fine. + + Thus one should be ok testing with less number of pods too. + + [Where problems could occur] + + * These patches mean that we are using smaller (same ones we did in + bionic) TCP window, thus for very large kernels/initrds we may hit http + timeouts on the server. Also it means that throughput speed of + deployments is lower again. + + * However it is better to deploy where we used to deploy before, than + failing to deploy small things on small networks.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1915288 Title: grub 2.04 net does not like deployments with kvm maas pods To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1915288/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
