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package integration
import (
"fmt"
"io/ioutil"
"os"
"path/filepath"
"strings"
. "github.com/containers/podman/v4/test/utils"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
. "github.com/onsi/gomega/gexec"
)
const cgroupRoot = "/sys/fs/cgroup"
var _ = Describe("Podman run with --cgroup-parent", func() {
var (
tempdir string
err error
podmanTest *PodmanTestIntegration
)
BeforeEach(func() {
SkipIfRootlessCgroupsV1("cgroup parent is not supported in cgroups v1")
tempdir, err = CreateTempDirInTempDir()
if err != nil {
os.Exit(1)
}
podmanTest = PodmanTestCreate(tempdir)
podmanTest.Setup()
podmanTest.SeedImages()
})
AfterEach(func() {
podmanTest.Cleanup()
f := CurrentGinkgoTestDescription()
processTestResult(f)
})
Specify("valid --cgroup-parent using cgroupfs", func() {
if !Containerized() {
Skip("Must be containerized to run this test.")
}
cgroup := "/zzz"
run := podmanTest.Podman([]string{"run", "--cgroupns=host", "--cgroup-parent", cgroup, fedoraMinimal, "cat", "/proc/self/cgroup"})
run.WaitWithDefaultTimeout()
Expect(run).Should(Exit(0))
Expect(run.OutputToString()).To(ContainSubstring(cgroup))
})
Specify("no --cgroup-parent", func() {
cgroup := "/libpod_parent"
if !Containerized() && podmanTest.CgroupManager != "cgroupfs" {
if isRootless() {
cgroup = "/user.slice"
} else {
cgroup = "/machine.slice"
}
}
run := podmanTest.Podman([]string{"run", "--cgroupns=host", fedoraMinimal, "cat", "/proc/self/cgroup"})
run.WaitWithDefaultTimeout()
Expect(run).Should(Exit(0))
Expect(run.OutputToString()).To(ContainSubstring(cgroup))
})
Specify("always honor --cgroup-parent", func() {
SkipIfCgroupV1("test not supported in cgroups v1")
if Containerized() || podmanTest.CgroupManager == "cgroupfs" {
Skip("Requires Systemd cgroup manager support")
}
if IsRemote() {
Skip("Not supported for remote")
}
run := podmanTest.Podman([]string{"run", "-d", "--cgroupns=host", fedoraMinimal, "sleep", "100"})
run.WaitWithDefaultTimeout()
Expect(run).Should(Exit(0))
cid := run.OutputToString()
exec := podmanTest.Podman([]string{"exec", cid, "cat", "/proc/1/cgroup"})
exec.WaitWithDefaultTimeout()
Expect(exec).Should(Exit(0))
containerCgroup := strings.TrimRight(strings.Replace(exec.OutputToString(), "0::", "", -1), "\n")
// Move the container process to a sub cgroup
content, err := ioutil.ReadFile(filepath.Join(cgroupRoot, containerCgroup, "cgroup.procs"))
Expect(err).To(BeNil())
oldSubCgroupPath := filepath.Join(filepath.Join(cgroupRoot, containerCgroup, "old-container"))
err = os.MkdirAll(oldSubCgroupPath, 0755)
Expect(err).To(BeNil())
err = ioutil.WriteFile(filepath.Join(oldSubCgroupPath, "cgroup.procs"), content, 0644)
Expect(err).To(BeNil())
newCgroup := fmt.Sprintf("%s/new-container", containerCgroup)
err = os.MkdirAll(filepath.Join(cgroupRoot, newCgroup), 0755)
Expect(err).To(BeNil())
run = podmanTest.Podman([]string{"--cgroup-manager=cgroupfs", "run", "--rm", "--cgroupns=host", fmt.Sprintf("--cgroup-parent=%s", newCgroup), fedoraMinimal, "cat", "/proc/self/cgroup"})
run.WaitWithDefaultTimeout()
Expect(run).Should(Exit(0))
cgroupEffective := strings.TrimRight(strings.Replace(run.OutputToString(), "0::", "", -1), "\n")
Expect(newCgroup).To(Equal(filepath.Dir(cgroupEffective)))
})
Specify("valid --cgroup-parent using slice", func() {
if Containerized() || podmanTest.CgroupManager == "cgroupfs" {
Skip("Requires Systemd cgroup manager support")
}
cgroup := "aaaa.slice"
run := podmanTest.Podman([]string{"run", "--cgroupns=host", "--cgroup-parent", cgroup, fedoraMinimal, "cat", "/proc/1/cgroup"})
run.WaitWithDefaultTimeout()
Expect(run).Should(Exit(0))
Expect(run.OutputToString()).To(ContainSubstring(cgroup))
})
})
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