[lxc-users] LXCFS installation effects

Tue Jun 5 19:09:52 UTC 2018

Stéphane,

Not sure what configuration file you are talking about. Configuration file under /etc/lxc/default.conf looks like this:

```
lxc.network.type = veth
lxc.network.link = br0
lxc.network.flags = up
lxc.network.hwaddr = XXXXX
```

Any lxc-* command that I could use to introspect the containers and get more information to troubleshoot ?

Thanks again!

Best,
Martín

On Tue, Jun 05, 2018 at 4:05 PM "Stéphane Graber" < ">"Stéphane Graber" > wrote:

> 
> 
> 
> What's your container's config like?
> 
> I wonder if it's somehow missing the include (usually indirect through
> common.conf) that's needed for the lxcfs hook.
> 
> 
> 
> On Tue, Jun 05, 2018 at 11:57:39AM -0700, Martín Fernández wrote:
> > Stéphane,
> >
> > `grep lxcfs /proc/1/mountinfo` doesn’t return any output.
> >
> > On the other hand,  /var/lib/lxcfs/ shows `cgroup` and `proc` folders
> with multiple files.
> >
> > Best,
> > Martín
> >
> > On Tue, Jun 05, 2018 at 3:54 PM "Stéphane Graber" < ">"Stéphane Graber"
> > wrote:
> >
> > >
> > >
> > >
> > > What do you see if you run "grep lxcfs /proc/1/mountinfo" inside the
> > > container?
> > >
> > > And do you see the lxcfs tree at /var/lib/lxcfs/ on the host?
> > >
> > >
> > >
> > > On Tue, Jun 05, 2018 at 11:50:51AM -0700, Martín Fernández wrote:
> > > > Stéphane,
> > > >
> > > > I just got time to do my work on lxcfs. Installed lxcfs running on a
> 
> > > Ubuntu 14.04 box, installed version is 2.0.8. 
> > > >
> > > > I restarted one of our containers and “I think” I see wrong output
> when
> > > running `free` for example. 
> > > >
> > > > lxc-info shows 1GB of memory usage and `free` shows 24GB of memory
> usage
> > > which is the same as the host memory usage. Anything I could be
> missing ?
> > > >
> > > > Short version of the process done would be:
> > > >
> > > > - apt-get install lxcfs
> > > > - sudo init 0 (in container)
> > > > - lxc-start -n container-name -d 
> > > >
> > > > Best,
> > > > Martín
> > > >
> > > > On Thu, May 31, 2018 at 12:39 AM "Stéphane Graber" < ">"Stéphane
> Graber"
> > > > wrote:
> > > >
> > > > >
> > > > >
> > > > >
> > > > > On Wed, May 30, 2018 at 07:16:04PM -0700, Martín Fernández wrote:
> > > > > > Stéphane,
> > > > > >
> > > > > > Thank you very much for the quick reply!
> > > > > >
> > > > > > What are you are saying is pretty awesome! That would make it
> super
> > > easy
> > > > > to start using it. Is there any constraint in terms of what
> versions
> > > of
> > > > > LXC are supported ? I can run LXCFS with LXC 1.0.10 ? 
> > > > >
> > > > > 1.0.10 should be fine though we certainly don't have all that many
> 
> > > users
> > > > > of that release now that it's two LTS ago :)
> > > > >
> > > > > In any case, it'll be safe to install LXCFS, then create a test
> > > > > container, confirm it behaves and if it does then start restarting
> 
> > > your
> > > > > existing containers, if it doesn't, let us know and we'll try to
> > > figure
> > > > > out why.
> > > > >
> > > > > > In order to understand a little bit more about how LXCFS works,
> does
> > >
> > > > > LXCFS hook into LXC starting process and mount /proc/* files ?
> > > > >
> > > > > That's correct, LXCFS when installed will create a tree at
> > > > > /var/lib/lxcfs those files then get bind-mounted on top of the
> > > > > containers /proc/* files through a LXC startup hook.
> > > > >
> > > > > > Thank you very much again!
> > > > > >
> > > > > > Best,
> > > > > > Martín
> > > > > >
> > > > > > On Wed, May 30, 2018 at 10:52 PM "Stéphane Graber" < ">"Stéphane
> 
> > > Graber"
> > > > > > wrote:
> > > > > >
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > _______________________________________________
> > > > > > > lxc-users mailing list
> > > > > > > lxc-users at lists.linuxcontainers.org
> > > > > > > http://lists.linuxcontainers.org/listinfo/lxc-users
> > > > > > >
> > > > > > >
> > > > > > >
> > > > > > > On Wed, May 30, 2018 at 05:08:59PM -0700, Martín Fernández
> wrote:
> > > > > > > > Hello,
> > > > > > > >
> > > > > > > > We are using LXC to virtualize containers in multiple of our
> 
> > > hosts.
> > > > > We
> > > > > > > have been running with LXC for a while now. 
> > > > > > > >
> > > > > > > > We started adding monitoring tools to our systems and found
> the
> > > > > known
> > > > > > > issue that LXC containers show the host information on
> > > /proc/meminfo
> > > > > and
> > > > > > > /proc/cpuinfo.  
> > > > > > > >
> > > > > > > > I found that LXCFS solves the problems mentioned above. What
> 
> > > would
> > > > > be
> > > > > > > required to setup LXCFS in my hosts ? Would I need to reboot
> all
> > > the
> > > > > > > containers ? Do I need to restore my containers filesystem ?
> Is
> > > there
> > > > > any
> > > > > > > guide/documentation around it ?
> > > > > > > >
> > > > > > > > Thanks before hand!
> > > > > > > >
> > > > > > > > Best,
> > > > > > > > Martín
> > > > > > >
> > > > > > > Hey there,
> > > > > > >
> > > > > > > You should just need to install lxcfs and then any container
> you
> > > start
> > > > >
> > > > > > > or restart will be using it. There's no way to set it up
> against a
> > >
> > > > > > > running container, but there's also no need to restart all
> your
> > > > > > > containers immediately, you can slowly roll it out if that
> helps.
> > > > > > >
> > > > > > > And no changes needed to the containers, it gets setup
> > > automatically
> > > > > > > through a lxc hook when the container starts.
> > > > > > >
> > > > > > >
> > > > > > > --
> > > > > > > Stéphane Graber
> > > > > > > Ubuntu developer
> > > > > > > http://www.ubuntu.com
> > > > > > >
> > > > > > >
> > > > > > >
> > > > >
> > > > > --
> > > > > Stéphane Graber
> > > > > Ubuntu developer
> > > > > http://www.ubuntu.com
> > > > >
> > > > >
> > > > >
> > >
> > > --
> > > Stéphane Graber
> > > Ubuntu developer
> > > http://www.ubuntu.com
> > >
> 
> --
> Stéphane Graber
> Ubuntu developer
> http://www.ubuntu.com
>
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