[pve-devel] [PATCH manger/container] detect containers not supporting pure cgroupv2

[Stoiko Ivanov <s.ivanov@proxmox.com>]

This series addresses the issue of running containers, which boot with a
systemd version which is too old (<232) to support the unified cgroup
hierarchy - This includes CentOS 7 and Ubuntu 16.04 containers.

The patch for pve-container simply logs to syslog with level err to notify
the user. Since container start runs through our stack into systemd
(and back into our stack), I did not see a better option (grateful for
feedback if there is of course).

One alternative might be to mount the container once in vm_start (or the
API calls), check and unmount again - but this seemed a bit expensive to do
unconditionally on every start.

The patch for pve6to7 simply loops through all containers and checks for
the condition

pve-container:
Stoiko Ivanov (1):
  prestart-hook: detect cgroupv2 incompatible systemd version

 src/PVE/LXC/Setup.pm      |  8 ++++++++
 src/PVE/LXC/Setup/Base.pm | 36 ++++++++++++++++++++++++++++++++++++
 src/lxc-pve-prestart-hook |  7 +++++++
 3 files changed, 51 insertions(+)

pve-manager:
Stoiko Ivanov (1):
  pve6to7: check for containers not supporting pure cgroupv2

 PVE/CLI/pve6to7.pm | 68 ++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)

-- 
2.30.2