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+package system

+

+import (

+	"context"

+	"os"

+	"testing"

+

+	"github.com/docker/docker/api/types"

+	"github.com/docker/docker/api/types/container"

+	"github.com/docker/docker/integration-cli/daemon"

+

+	"github.com/gotestyourself/gotestyourself/assert"

+)

+

+// hasSystemd checks whether the host was booted with systemd as its init

+// system. Stolen from

+// https://github.com/coreos/go-systemd/blob/176f85496f4e/util/util.go#L68

+func hasSystemd() bool {

+	fi, err := os.Lstat("/run/systemd/system")

+	if err != nil {

+		return false

+	}

+	return fi.IsDir()

+}

+

+// TestCgroupDriverSystemdMemoryLimit checks that container

+// memory limit can be set when using systemd cgroupdriver.

+//  https://github.com/moby/moby/issues/35123

+func TestCgroupDriverSystemdMemoryLimit(t *testing.T) {

+	t.Parallel()

+

+	if !hasSystemd() {

+		t.Skip("systemd not available")

+	}

+

+	d := daemon.New(t, "docker", "dockerd", daemon.Config{})

+	client, err := d.NewClient()

+	assert.NilError(t, err)

+	d.StartWithBusybox(t, "--exec-opt", "native.cgroupdriver=systemd", "--iptables=false")

+	defer d.Stop(t)

+

+	const mem = 64 * 1024 * 1024 // 64 MB

+	cfg := container.Config{

+		Image: "busybox",

+		Cmd:   []string{"top"},

+	}

+	hostcfg := container.HostConfig{

+		Resources: container.Resources{

+			Memory: mem,

+		},

+	}

+

+	ctx := context.Background()

+	ctr, err := client.ContainerCreate(ctx, &cfg, &hostcfg, nil, "")

+	assert.NilError(t, err)

+	defer client.ContainerRemove(ctx, ctr.ID, types.ContainerRemoveOptions{Force: true})

+

+	err = client.ContainerStart(ctx, ctr.ID, types.ContainerStartOptions{})

+	assert.NilError(t, err)

+

+	s, err := client.ContainerInspect(ctx, ctr.ID)

+	assert.NilError(t, err)

+	assert.Equal(t, s.HostConfig.Memory, mem)

+}