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support `--privileged --cgroupns=private` on cgroup v1 

Signed-off-by: Akihiro Suda <akihiro.suda.cz@hco.ntt.co.jp>
This commit is contained in:
Akihiro Suda 2020-04-21 23:06:44 +09:00
parent ba8129b28a
commit 33ee7941d4
3 changed files with 3 additions and 11 deletions
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4
daemon/daemon_unix.go
View File

@ -711,10 +711,6 @@ func verifyPlatformContainerSettings(daemon *Daemon, hostConfig *containertypes.
if !sysInfo.CgroupNamespaces {
warnings = append(warnings, "Your kernel does not support cgroup namespaces. Cgroup namespace setting discarded.")
}
if hostConfig.Privileged && !cgroups.IsCgroup2UnifiedMode() {
return warnings, fmt.Errorf("privileged mode is incompatible with private cgroup namespaces on cgroup v1 host. You must run the container in the host cgroup namespace when running privileged mode")
}
}
return warnings, nil

5
daemon/oci_linux.go
View File

@ -339,10 +339,7 @@ func WithNamespaces(daemon *Daemon, c *container.Container) coci.SpecOpts {
if !cgroupNsMode.Valid() {
return fmt.Errorf("invalid cgroup namespace mode: %v", cgroupNsMode)
}
// for cgroup v2: unshare cgroupns even for privileged containers
// https://github.com/containers/libpod/pull/4374#issuecomment-549776387
if cgroupNsMode.IsPrivate() && (cgroups.IsCgroup2UnifiedMode() || !c.HostConfig.Privileged) {
if cgroupNsMode.IsPrivate() {
nsCgroup := specs.LinuxNamespace{Type: "cgroup"}
setNamespace(s, nsCgroup)
}

5
integration/container/run_cgroupns_linux_test.go
View File

@ -114,9 +114,8 @@ func TestCgroupNamespacesRunPrivilegedAndPrivate(t *testing.T) {
skip.If(t, testEnv.IsRemoteDaemon())
skip.If(t, !requirement.CgroupNamespacesEnabled())
// Running with both privileged and cgroupns=private is not allowed
errStr := "privileged mode is incompatible with private cgroup namespaces on cgroup v1 host. You must run the container in the host cgroup namespace when running privileged mode"
testCreateFailureWithCgroupNs(t, "private", errStr, container.WithPrivileged(true), container.WithCgroupnsMode("private"))
containerCgroup, daemonCgroup := testRunWithCgroupNs(t, "private", container.WithPrivileged(true), container.WithCgroupnsMode("private"))
assert.Assert(t, daemonCgroup != containerCgroup)
}
func TestCgroupNamespacesRunInvalidMode(t *testing.T) {