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[release/1.6] cri: make swapping disabled with memory limit #7815

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merged 1 commit into from Dec 14, 2022
Merged

[release/1.6] cri: make swapping disabled with memory limit #7815

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14 changes: 14 additions & 0 deletions integration/container_update_resources_test.go
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Expand Up @@ -234,6 +234,13 @@ func TestUpdateContainerResources_MemoryLimit(t *testing.T) {

EnsureImageExists(t, pauseImage)

expectedSwapLimit := func(memoryLimit int64) *int64 {
if cgroups.Mode() == cgroups.Unified {
memoryLimit = 0
}
return &memoryLimit
}

t.Log("Create a container with memory limit")
cnConfig := ContainerConfig(
"container",
Expand All @@ -251,6 +258,7 @@ func TestUpdateContainerResources_MemoryLimit(t *testing.T) {
spec, err := container.Spec(context.Background())
require.NoError(t, err)
checkMemoryLimit(t, spec, 200*1024*1024)
checkMemorySwapLimit(t, spec, expectedSwapLimit(200*1024*1024))

t.Log("Update container memory limit after created")
err = runtimeService.UpdateContainerResources(cn, &runtime.LinuxContainerResources{
Expand All @@ -262,6 +270,7 @@ func TestUpdateContainerResources_MemoryLimit(t *testing.T) {
spec, err = container.Spec(context.Background())
require.NoError(t, err)
checkMemoryLimit(t, spec, 400*1024*1024)
checkMemorySwapLimit(t, spec, expectedSwapLimit(400*1024*1024))

t.Log("Start the container")
require.NoError(t, runtimeService.StartContainer(cn))
Expand All @@ -274,6 +283,8 @@ func TestUpdateContainerResources_MemoryLimit(t *testing.T) {
stat, err := cgroup.Stat(cgroups.IgnoreNotExist)
require.NoError(t, err)
assert.Equal(t, uint64(400*1024*1024), stat.Memory.Usage.Limit)
swapLimit := getCgroupSwapLimitForTask(t, task)
assert.Equal(t, uint64(400*1024*1024), swapLimit)

t.Log("Update container memory limit after started")
err = runtimeService.UpdateContainerResources(cn, &runtime.LinuxContainerResources{
Expand All @@ -285,11 +296,14 @@ func TestUpdateContainerResources_MemoryLimit(t *testing.T) {
spec, err = container.Spec(context.Background())
require.NoError(t, err)
checkMemoryLimit(t, spec, 800*1024*1024)
checkMemorySwapLimit(t, spec, expectedSwapLimit(800*1024*1024))

t.Log("Check memory limit in cgroup")
stat, err = cgroup.Stat(cgroups.IgnoreNotExist)
require.NoError(t, err)
assert.Equal(t, uint64(800*1024*1024), stat.Memory.Usage.Limit)
swapLimit = getCgroupSwapLimitForTask(t, task)
assert.Equal(t, uint64(800*1024*1024), swapLimit)
}

func TestUpdateContainerResources_StatusUpdated(t *testing.T) {
Expand Down
4 changes: 4 additions & 0 deletions pkg/cri/opts/spec_linux.go
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Expand Up @@ -447,6 +447,10 @@ func WithResources(resources *runtime.LinuxContainerResources, tolerateMissingHu
}
if limit != 0 {
s.Linux.Resources.Memory.Limit = &limit
// swap/memory limit should be equal to prevent container from swapping by default
if swapLimit == 0 {
s.Linux.Resources.Memory.Swap = &limit
}
}
if swapLimit != 0 {
s.Linux.Resources.Memory.Swap = &swapLimit
Expand Down
20 changes: 16 additions & 4 deletions pkg/cri/server/container_update_resources_linux_test.go
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Expand Up @@ -70,7 +70,10 @@ func TestUpdateOCILinuxResource(t *testing.T) {
Process: &runtimespec.Process{OOMScoreAdj: oomscoreadj},
Linux: &runtimespec.Linux{
Resources: &runtimespec.LinuxResources{
Memory: &runtimespec.LinuxMemory{Limit: proto.Int64(54321)},
Memory: &runtimespec.LinuxMemory{
Limit: proto.Int64(54321),
Swap: proto.Int64(54321),
},
CPU: &runtimespec.LinuxCPU{
Shares: proto.Uint64(4444),
Quota: proto.Int64(5555),
Expand Down Expand Up @@ -113,7 +116,10 @@ func TestUpdateOCILinuxResource(t *testing.T) {
Process: &runtimespec.Process{OOMScoreAdj: oomscoreadj},
Linux: &runtimespec.Linux{
Resources: &runtimespec.LinuxResources{
Memory: &runtimespec.LinuxMemory{Limit: proto.Int64(54321)},
Memory: &runtimespec.LinuxMemory{
Limit: proto.Int64(54321),
Swap: proto.Int64(54321),
},
CPU: &runtimespec.LinuxCPU{
Shares: proto.Uint64(4444),
Quota: proto.Int64(5555),
Expand Down Expand Up @@ -151,7 +157,10 @@ func TestUpdateOCILinuxResource(t *testing.T) {
Process: &runtimespec.Process{OOMScoreAdj: oomscoreadj},
Linux: &runtimespec.Linux{
Resources: &runtimespec.LinuxResources{
Memory: &runtimespec.LinuxMemory{Limit: proto.Int64(54321)},
Memory: &runtimespec.LinuxMemory{
Limit: proto.Int64(54321),
Swap: proto.Int64(54321),
},
CPU: &runtimespec.LinuxCPU{
Shares: proto.Uint64(4444),
Quota: proto.Int64(5555),
Expand Down Expand Up @@ -197,7 +206,10 @@ func TestUpdateOCILinuxResource(t *testing.T) {
Process: &runtimespec.Process{OOMScoreAdj: oomscoreadj},
Linux: &runtimespec.Linux{
Resources: &runtimespec.LinuxResources{
Memory: &runtimespec.LinuxMemory{Limit: proto.Int64(54321)},
Memory: &runtimespec.LinuxMemory{
Limit: proto.Int64(54321),
Swap: proto.Int64(54321),
},
CPU: &runtimespec.LinuxCPU{
Shares: proto.Uint64(4444),
Quota: proto.Int64(5555),
Expand Down