[CentOS-virt] Fwd: About Centos 7 + Virt-manager

Wed Jul 16 13:25:01 UTC 2014
Scott Dowdle <dowdle at montanalinux.org>


----- Original Message -----
> Thanks a lot, for your replies, my boss is a big fan of lxc, but I
> have read many forums, and what I perceive is rhel7 -> docker,
> centos7 ---> openvz
> With great difficulty, I managed a container with virt-manager, I
> even noticed a bug when trying to create a bridge.
> Conclusion, as we want to use a container operating system is better
> to use openvz, now is there interfaces that allow a user no expert
> reserve resources such as memory, cpu, etc without going to browse
> cgroups?

Just to clarify, the OpenVZ kernel runs fine on RHEL(5&6) too.  In fact I have a couple of RHEL hosts running OpenVZ.

So far as resource management goes, in the EL6-based OpenVZ kernel, vSwap-based configuration/management is preferred whereas in the EL5-based kernel (which OpenVZ is EOL'ing in Oct. I think), user_beancounters are what you have.  vzctl's resource management facilities do what the vast majority of container users need.

vzctl-core is available for non-OpenVZ kernels but it is missing quite a few features compared to when run on an OpenVZ-based kernel.  See: https://wiki.openvz.org/Vzctl_for_upstream_kernel  I don't think it is well tested on upstream kernels.

Scott Dowdle
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