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systemd: make rundir always accessible

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so that the PIDFile can be accessed also without being in the rootless
user namespace.

Closes: https://github.com/containers/podman/issues/8506

Signed-off-by: Giuseppe Scrivano <gscrivan@redhat.com>
This commit is contained in:
Giuseppe Scrivano
2021-01-04 11:15:28 +01:00
parent 23f25b8261
commit 898f57c4c1
2 changed files with 20 additions and 0 deletions
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5
libpod/oci_conmon_linux.go
View File

@ -193,6 +193,11 @@ func hasCurrentUserMapped(ctr *Container) bool {
// CreateContainer creates a container.
func (r *ConmonOCIRuntime) CreateContainer(ctr *Container, restoreOptions *ContainerCheckpointOptions) error {
// always make the run dir accessible to the current user so that the PID files can be read without
// being in the rootless user namespace.
if err := makeAccessible(ctr.state.RunDir, 0, 0); err != nil {
return err
}
if !hasCurrentUserMapped(ctr) {
for _, i := range []string{ctr.state.RunDir, ctr.runtime.config.Engine.TmpDir, ctr.config.StaticDir, ctr.state.Mountpoint, ctr.runtime.config.Engine.VolumePath} {
if err := makeAccessible(i, ctr.RootUID(), ctr.RootGID()); err != nil {

15
test/e2e/systemd_test.go
View File

@ -131,6 +131,21 @@ WantedBy=multi-user.target
Expect(conData[0].Config.SystemdMode).To(BeTrue())
})
It("podman create container with --uidmap and conmon PidFile accessible", func() {
ctrName := "testCtrUidMap"
run := podmanTest.Podman([]string{"run", "-d", "--uidmap=0:1:1000", "--name", ctrName, ALPINE, "top"})
run.WaitWithDefaultTimeout()
Expect(run.ExitCode()).To(Equal(0))
session := podmanTest.Podman([]string{"inspect", "--format", "{{.ConmonPidFile}}", ctrName})
session.WaitWithDefaultTimeout()
Expect(session.ExitCode()).To(Equal(0))
pidFile := strings.TrimSuffix(session.OutputToString(), "\n")
_, err := ioutil.ReadFile(pidFile)
Expect(err).To(BeNil())
})
It("podman create container with systemd=always triggers systemd mode", func() {
ctrName := "testCtr"
run := podmanTest.Podman([]string{"create", "--name", ctrName, "--systemd", "always", ALPINE})