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cgroup v2: support rootless systemd

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Tested with both Podman (master) and Moby (master), on Ubuntu 19.10 .

$ podman --cgroup-manager=systemd run -it --rm --runtime=runc \
  --cgroupns=host --memory 42m --cpus 0.42 --pids-limit 42 alpine
/ # cat /proc/self/cgroup
0::/user.slice/user-1001.slice/user@1001.service/user.slice/libpod-132ff0d72245e6f13a3bbc6cdc5376886897b60ac59eaa8dea1df7ab959cbf1c.scope
/ # cat /sys/fs/cgroup/user.slice/user-1001.slice/user@1001.service/user.slice/libpod-132ff0d72245e6f13a3bbc6cdc5376886897b60ac59eaa8dea1df7ab959cbf1c.scope/memory.max
44040192
/ # cat /sys/fs/cgroup/user.slice/user-1001.slice/user@1001.service/user.slice/libpod-132ff0d72245e6f13a3bbc6cdc5376886897b60ac59eaa8dea1df7ab959cbf1c.scope/cpu.max
42000 100000
/ # cat /sys/fs/cgroup/user.slice/user-1001.slice/user@1001.service/user.slice/libpod-132ff0d72245e6f13a3bbc6cdc5376886897b60ac59eaa8dea1df7ab959cbf1c.scope/pids.max
42

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
This commit is contained in:
Akihiro Suda
2020-04-01 10:47:06 +09:00
parent 492cfd8bf9
commit bf15cc99b1
13 changed files with 276 additions and 43 deletions
Download Patch File Download Diff File Expand all files Collapse all files
rootless_linux.go
-4
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@@ -19,10 +19,6 @@ func shouldUseRootlessCgroupManager(context *cli.Context) (bool, error) {
if b != nil {
return *b, nil
}
if context.GlobalBool("systemd-cgroup") {
return false, nil
}
}
if os.Geteuid() != 0 {
return true, nil