excellent report, thanks for working on this Mike! Best regards, Fabricio Aguiar Software Engineer, Pulp Project Red Hat Brazil - Latam <https://www.redhat.com/> +55 11 999652368
On Tue, Feb 18, 2020 at 5:51 PM Mike DePaulo <mikedep...@redhat.com> wrote: > Nested hardware virtualization with KVM works on Travis, but not on GitHub > actions. > > I highly recommend we use it, even if it means maintaining some CI tests > on travis rather than GHA. > > I evaluated 2 other possible solutions on GitHub Actions: VirtualBox > software virtualization, and qemu emulation. > > I tested by creating prototype CI for Pulplift, and after spending many > hours, had to resort to some manual testing of the other 2 alternatives' > final steps. They do work though; they launch virtual/emulated machines. > https://github.com/pulp/pulplift/pull/66 > > Test results: > > Nested hardware virtualization with KVM works on Travis: > Pros: > - Fastest > - Very well featured > - Works with pulplift as-is > Cons: > - Cannot work on GHA, which use Azure legacy BIOS VMs, without nested > Intel VT-X / AMD-V, as of Ubuntu 18.04. (Hoping for change with 20.04). > - May not work on Travis indefinitely. They use LXD now, but have no > guarantees to keep using LXD with Intel VT-x / AMD-V enabled. > > Software Virtualization with VirtualBox: > Pros: > - None really, just less slow than qemu > Cons: > - Limited to 32-bit x86 guest OS's. CentOS 7 32-bit x86 is unofficial, and > Fedora 30 is the last 32-bit x86 Fedora. Neither are ideal for testing > - Slow: 1 vCPU, and slower than it was in the past (~2/3 of native CPU > performance) back in 2006 or so when OS's used fewer hardware features. > - Support dropped as of VirtualBox 6.1, which just came out. 6.0 is only > supported until 2020-07. > - Requires some changes to pulplift / box definitions to work > > Emulation with Qemu: > Pros: > - Well-Supported > - Has all the other features of qemu-kvm, including emulated CPU count > - Needs only 1 easily-set setting needed for pulplift to work with it > Cons: > - Very slow. Rule of thumb is at best, 10% of native performance. > > -Mike > > On Thu, Feb 13, 2020 at 6:14 PM Mike DePaulo <mikedep...@redhat.com> > wrote: > >> I've only tested Travis so far, but this is very promising. >> >> Hardware KVM virtualization appears to be working on Travis, via pulplift >> (which uses vagrant, libvirt & KVM), without any hacks! >> >> My current theory is that Travis uses either OpenVZ or KVM, and that the >> "svm" warning is a limitation of nested virtualization working properly. >> >> I'm going to investigate Travis a little further before trying out GHA. >> (Or test them in parallel with same commands.) Including making 100% sure >> it is not falling back to unaccelerated qemu emulation. >> >> $ uname -a >> Linux travis-job-7dcf26ac-24c0-462e-8418-69c466817f8e 5.0.0-1026-gcp >> #27~18.04.1-Ubuntu SMP Fri Nov 15 07:40:39 UTC 2019 x86_64 x86_64 x86_64 >> GNU/Linux >> >> $ sudo virt-what >> kvm >> >> $ sudo qemu-system-x86_64 -machine accel=kvm -vnc 127.0.0.1:1 >> qemu-system-x86_64: warning: host doesn't support requested feature: >> CPUID.80000001H:ECX.svm [bit 2] >> ^C >> >> $ sudo vagrant ssh fedora31 >> Last login: Thu Feb 13 22:55:40 2020 from 192.168.121.1 >> $ uname -a >> Linux localhost.localdomain 5.3.7-301.fc31.x86_64 #1 SMP Mon Oct 21 >> 19:18:58 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux >> $ cat /etc/redhat-release >> Fedora release 31 (Thirty One) >> >> -Mike >> >> -- >> >> Mike DePaulo >> >> He / Him / His >> >> Service Reliability Engineer, Pulp >> >> Red Hat <https://www.redhat.com/> >> >> IM: mikedep333 >> >> GPG: 51745404 >> <https://www.redhat.com/> >> > > > -- > > Mike DePaulo > > He / Him / His > > Service Reliability Engineer, Pulp > > Red Hat <https://www.redhat.com/> > > IM: mikedep333 > > GPG: 51745404 > <https://www.redhat.com/> > _______________________________________________ > Pulp-dev mailing list > Pulp-dev@redhat.com > https://www.redhat.com/mailman/listinfo/pulp-dev >
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