On Fri, Sep 20, 2019 at 04:47:09PM -0400, Just Marvin wrote:
> Daniel,
>
> I appreciate the insights into the challenges. The goal that you
> stated, though, is going to be hard to achieve with a limitation of
> bare-metal only for developers. See the other thread in this forum for the
> service mesh. The kind of resource requirements, as stated in that thread,
> needed to do something like that on CRC will rarely be found on a developer
> laptop. So, for someone like me, the choice really boils down to running a
> full-fledged OCP on a dedicated machine / VM if I want to try out /
> experience something like the OpenShift Service Mesh. And such dedicated
> machines / VMs are hard to come by unless one uses the public cloud. So, I
> hope that running in such an environment becomes easier for CRC.
>
> Regards,
> Marvin
Hi Marvin,
Hum, there is something I don't understand,
if you are going to use a dedicated machine to run your OCP workload, why
not run the full install then. We made a number of choice to be able to
adapt to the laptop situation:
- single node, hence only one VM to minimize the memory footprint
and trashing between competing VMs
- pre-baked installation, so that CRC is usable nearly immediately
after download compared to the time it would take to run the installer
fetch everything and run the install process on a laptop hard drive
- disable a number of operators which are part of a full fledged install
of OCP to reduce the memory footprint, most notably the telemetry part.
Some of those I would avoid if I were to install my devel cluster on
a 64 GB tower I have laying around in my office. The install would have to
be done once, not on my main machine so no big deal if it takes one hour,
it would be closer in behaviour to a full cluster on AWS too.
We added back last year the minishift --remote for those use case because
TBH running the Ansible playbook for 3.x on a random Linux install was a bit
of a challenge. But for CRC that's not really possible, we don't run the
installer, it's pre-cooked, and requires the CoreOS base, so I don't see
how we could ever do this.
One of the scenario we could try is to take the installed bundle VM content
and try to run it inside a container instead of a VM, but that means no
guarantee on the kernel behaviour, nor system library, and sorting out
networking would likely be case by case.
I wonder if the real solution isn't for those case to make it easier
for people to run the libvirt side of the installer directly. Another option
is the Ansible route, though TBH I don't know how well that's supported
in 4.x
Hope this makes sense,
Daniel
> On Fri, Sep 20, 2019 at 9:21 AM Daniel Veillard <veill...@redhat.com> wrote:
>
> > On Thu, Sep 19, 2019 at 10:00:40PM -0300, Fernando Lozano wrote:
> > > Yes, bare-metal only.
> >
> > Hi,
> >
> > I'm the manager for the CRC group.
> > We indeed tested it only on bare metal. The goal is really to provide
> > a quick and easy way for a developer to run OCP 4.x on their laptop.
> > That said as Joel suggested you may try to enable nested virtualization
> > this will likely allow to boot the VM. Then it's a question of networking
> > usually, virt takes 20% of the effort, networking is the 75% of the
> > remaining problems <grin/>
> >
> > Daniel
> >
> > > On Thu, Sep 19, 2019 at 8:50 PM Just Marvin <
> > > marvin.the.cynical.ro...@gmail.com> wrote:
> > >
> > > > Fernando,
> > > >
> > > > Is CRC only expected to run on bare-metal? I tried running it on a
> > VM
> > > > in GCP and it didn't work, complaining about virtualization problems
> > (sorry
> > > > - forget the exact error). It runs find on my laptop, but I'd really
> > like
> > > > to not muddy up my laptop with all kinds of experimental things.
> > > >
> > > > Regards,
> > > > Marvin
> > > >
> > > > On Wed, Sep 18, 2019 at 12:35 PM Fernando Lozano <floz...@redhat.com>
> > > > wrote:
> > > >
> > > >> Hi Joel,
> > > >>
> > > >> Yes, CRC requires virtualization. It creates and manages a VM, using
> > the
> > > >> hypervisor provided by your laptop OS, and runs OpenShift inside that
> > VM.
> > > >> AFAIK there is no more all-in-one containerized support for OpenShift
> > so
> > > >> more 'oc cluster up' for OpenShift 4.x.
> > > >>
> > > >> []s, Fernando Lozano
> > > >>
> > > >>
> > > >> On Wed, Sep 18, 2019 at 9:44 AM Joel Pearson <
> > > >> japear...@agiledigital.com.au> wrote:
> > > >>
> > > >>> With CodeReady Container, it's not possible to use it without
> > > >>> virtualisation right? Because it needs CoreOS, and can't startup on
> > an
> > > >>> existing docker installation like you can with "oc cluster up"?
> > > >>>
> > > >>> I'm only asking because I almost got OKD 3.11 running on Windows 10
> > WSL
> > > >>> (windows subsystem for linux) v2. But if it's a full VM, then
> > running
> > > >>> inside WSL 2 doesn't really make sense (and probably doesn't work
> > anyway).
> > > >>>
> > > >>> On Sat, 14 Sep 2019 at 02:35, Daniel Comnea <comnea.d...@gmail.com>
> > > >>> wrote:
> > > >>>
> > > >>>> Recently folks were asking what is the minishift's alternative for
> > v4
> > > >>>> and in case you've missed the news see [1]
> > > >>>>
> > > >>>> Hopefully that will also work for OKD v4 once the MVP is out.
> > > >>>>
> > > >>>>
> > > >>>> Dani
> > > >>>>
> > > >>>> [1]
> > > >>>>
> > https://developers.redhat.com/blog/2019/09/05/red-hat-openshift-4-on-your-laptop-introducing-red-hat-codeready-containers/
> > > >>>> _______________________________________________
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> >
> > --
> > Daniel Veillard | Red Hat Developers Tools
> > http://developer.redhat.com/
> > veill...@redhat.com | libxml Gnome XML XSLT toolkit http://xmlsoft.org/
> > http://veillard.com/ | virtualization library http://libvirt.org/
> >
--
Daniel Veillard | Red Hat Developers Tools http://developer.redhat.com/
veill...@redhat.com | libxml Gnome XML XSLT toolkit http://xmlsoft.org/
http://veillard.com/ | virtualization library http://libvirt.org/
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