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Since OpenVZ isn't actually virtualization and just a container would there be issues setting up a CentOS 7 container on a Node that is only running CentOS 6?

Analog
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2 Answers2

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We use CentOS 6 and Virtuozzo 4.7 with CentOS 7 containers, OpenVZ almost the same as Virtuozzo, so it should work. It was not supported by Virtuzzo, but works without big problems, there was only several issues with systemd after executing yum update inside containers, which was solved by host reboot.

Alexander Tolkachev
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  • Excellent! Thank you for this information. I was having issues with `systemd` after doing the initial `yum update` and was unable to use `systemctl`. I will get the host node rebooted and hope this solves my issues as well. – Analog Jul 18 '18 at 13:07
  • I've got it working now, my Centos 7 container is running on a Centos 6 node. Though im just curious did you ever get `systemctl` to work? Mine just outputs `Failed to list units: Activation of org.freedesktop.systemd1 timed out` – Analog Jul 18 '18 at 13:33
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    @Analog, it could be [this bug](https://github.com/systemd/systemd/issues/1961). But we doesn't have any issues with systemctl, everything works. – Alexander Tolkachev Jul 18 '18 at 13:47
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    @Analog also I find old thread, we have issue, when `vzdummy-systemd` rpm was not installed inside container. May be that cause your issue. – Alexander Tolkachev Jul 18 '18 at 13:51
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We run Virtuozzo 6.0.12 and 7.0.10 clusters and host both CENTOS 6 & 7 containers on both, so the answer is "YES" but depends on what you are running on the host node. I think we even have a couple of Ubuntu CT's as well.

Sid Young
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