From e328222d03edbb63733cfe1c09fc32bc4bedd52b Mon Sep 17 00:00:00 2001 From: Akihiro Suda Date: Wed, 20 May 2020 13:51:12 +0900 Subject: [PATCH] cgroup2: implement `containerd.events.TaskOOM` event How to test (from https://github.com/opencontainers/runc/pull/2352#issuecomment-620834524): (host)$ sudo swapoff -a (host)$ sudo ctr run -t --rm --memory-limit $((1024*1024*32)) docker.io/library/alpine:latest foo (container)$ sh -c 'VAR=$(seq 1 100000000)' An event `/tasks/oom {"container_id":"foo"}` will be displayed in `ctr events`. Signed-off-by: Akihiro Suda --- metrics/cgroups/v2/cgroups.go | 15 - metrics/cgroups/v2/memory.go | 16 + pkg/oom/oom.go | 30 ++ pkg/oom/{epoll.go => v1/v1.go} | 26 +- pkg/oom/v2/v2.go | 113 ++++ runtime/v2/runc/v1/service.go | 5 +- runtime/v2/runc/v2/service.go | 20 +- vendor.conf | 2 +- .../github.com/containerd/cgroups/README.md | 21 + .../github.com/containerd/cgroups/cgroup.go | 21 +- .../github.com/containerd/cgroups/control.go | 3 + vendor/github.com/containerd/cgroups/go.mod | 2 +- .../containerd/cgroups/hierarchy.go | 2 +- .../github.com/containerd/cgroups/memory.go | 171 +++++- .../containerd/cgroups/v2/manager.go | 64 ++- .../containerd/cgroups/v2/stats/metrics.pb.go | 490 +++++++++++++++--- .../containerd/cgroups/v2/stats/metrics.proto | 9 + 17 files changed, 861 insertions(+), 149 deletions(-) create mode 100644 pkg/oom/oom.go rename pkg/oom/{epoll.go => v1/v1.go} (81%) create mode 100644 pkg/oom/v2/v2.go diff --git a/metrics/cgroups/v2/cgroups.go b/metrics/cgroups/v2/cgroups.go index c0bce599633c..4159190e6830 100644 --- a/metrics/cgroups/v2/cgroups.go +++ b/metrics/cgroups/v2/cgroups.go @@ -21,10 +21,8 @@ package v2 import ( "context" - "github.com/containerd/containerd/errdefs" "github.com/containerd/containerd/events" "github.com/containerd/containerd/runtime" - "github.com/containerd/containerd/runtime/v1/linux" metrics "github.com/docker/go-metrics" ) @@ -48,19 +46,6 @@ func (m *cgroupsMonitor) Monitor(c runtime.Task) error { if err := m.collector.Add(c); err != nil { return err } - t, ok := c.(*linux.Task) - if !ok { - return nil - } - cg, err := t.Cgroup() - if err != nil { - if errdefs.IsNotFound(err) { - return nil - } - return err - } - // OOM handler is not implemented yet - _ = cg return nil } diff --git a/metrics/cgroups/v2/memory.go b/metrics/cgroups/v2/memory.go index e3869a3eab40..7d0332a29095 100644 --- a/metrics/cgroups/v2/memory.go +++ b/metrics/cgroups/v2/memory.go @@ -586,4 +586,20 @@ var memoryMetrics = []*metric{ } }, }, + { + name: "memory_oom", + help: "The number of times a container has received an oom event", + unit: metrics.Total, + vt: prometheus.GaugeValue, + getValues: func(stats *v2.Metrics) []value { + if stats.MemoryEvents == nil { + return nil + } + return []value{ + { + v: float64(stats.MemoryEvents.Oom), + }, + } + }, + }, } diff --git a/pkg/oom/oom.go b/pkg/oom/oom.go new file mode 100644 index 000000000000..6d5bf270c09d --- /dev/null +++ b/pkg/oom/oom.go @@ -0,0 +1,30 @@ +// +build linux + +/* + Copyright The containerd Authors. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +*/ + +package oom + +import ( + "context" +) + +// Watcher watches OOM events +type Watcher interface { + Close() error + Run(ctx context.Context) + Add(id string, cg interface{}) error +} diff --git a/pkg/oom/epoll.go b/pkg/oom/v1/v1.go similarity index 81% rename from pkg/oom/epoll.go rename to pkg/oom/v1/v1.go index 6675603328b4..be8de74db620 100644 --- a/pkg/oom/epoll.go +++ b/pkg/oom/v1/v1.go @@ -16,7 +16,7 @@ limitations under the License. */ -package oom +package v1 import ( "context" @@ -24,28 +24,30 @@ import ( "github.com/containerd/cgroups" eventstypes "github.com/containerd/containerd/api/events" + "github.com/containerd/containerd/pkg/oom" "github.com/containerd/containerd/runtime" "github.com/containerd/containerd/runtime/v2/shim" + "github.com/pkg/errors" "github.com/sirupsen/logrus" "golang.org/x/sys/unix" ) // New returns an epoll implementation that listens to OOM events // from a container's cgroups. -func New(publisher shim.Publisher) (*Epoller, error) { +func New(publisher shim.Publisher) (oom.Watcher, error) { fd, err := unix.EpollCreate1(unix.EPOLL_CLOEXEC) if err != nil { return nil, err } - return &Epoller{ + return &epoller{ fd: fd, publisher: publisher, set: make(map[uintptr]*item), }, nil } -// Epoller implementation for handling OOM events from a container's cgroup -type Epoller struct { +// epoller implementation for handling OOM events from a container's cgroup +type epoller struct { mu sync.Mutex fd int @@ -59,12 +61,12 @@ type item struct { } // Close the epoll fd -func (e *Epoller) Close() error { +func (e *epoller) Close() error { return unix.Close(e.fd) } // Run the epoll loop -func (e *Epoller) Run(ctx context.Context) { +func (e *epoller) Run(ctx context.Context) { var events [128]unix.EpollEvent for { select { @@ -86,8 +88,12 @@ func (e *Epoller) Run(ctx context.Context) { } } -// Add the cgroup to the epoll monitor -func (e *Epoller) Add(id string, cg cgroups.Cgroup) error { +// Add cgroups.Cgroup to the epoll monitor +func (e *epoller) Add(id string, cgx interface{}) error { + cg, ok := cgx.(cgroups.Cgroup) + if !ok { + return errors.Errorf("expected cgroups.Cgroup, got: %T", cgx) + } e.mu.Lock() defer e.mu.Unlock() fd, err := cg.OOMEventFD() @@ -105,7 +111,7 @@ func (e *Epoller) Add(id string, cg cgroups.Cgroup) error { return unix.EpollCtl(e.fd, unix.EPOLL_CTL_ADD, int(fd), &event) } -func (e *Epoller) process(ctx context.Context, fd uintptr) { +func (e *epoller) process(ctx context.Context, fd uintptr) { flush(fd) e.mu.Lock() i, ok := e.set[fd] diff --git a/pkg/oom/v2/v2.go b/pkg/oom/v2/v2.go new file mode 100644 index 000000000000..a956b1c86676 --- /dev/null +++ b/pkg/oom/v2/v2.go @@ -0,0 +1,113 @@ +// +build linux + +/* + Copyright The containerd Authors. + + Licensed under the Apache License, Version 2.0 (the "License"); + you may not use this file except in compliance with the License. + You may obtain a copy of the License at + + http://www.apache.org/licenses/LICENSE-2.0 + + Unless required by applicable law or agreed to in writing, software + distributed under the License is distributed on an "AS IS" BASIS, + WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + See the License for the specific language governing permissions and + limitations under the License. +*/ + +package v2 + +import ( + "context" + + cgroupsv2 "github.com/containerd/cgroups/v2" + eventstypes "github.com/containerd/containerd/api/events" + "github.com/containerd/containerd/pkg/oom" + "github.com/containerd/containerd/runtime" + "github.com/containerd/containerd/runtime/v2/shim" + "github.com/pkg/errors" + "github.com/sirupsen/logrus" +) + +// New returns an implementation that listens to OOM events +// from a container's cgroups. +func New(publisher shim.Publisher) (oom.Watcher, error) { + return &watcher{ + itemCh: make(chan item), + publisher: publisher, + }, nil +} + +// watcher implementation for handling OOM events from a container's cgroup +type watcher struct { + itemCh chan item + publisher shim.Publisher +} + +type item struct { + id string + ev cgroupsv2.Event + err error +} + +// Close closes the watcher +func (w *watcher) Close() error { + return nil +} + +// Run the loop +func (w *watcher) Run(ctx context.Context) { + lastOOMMap := make(map[string]uint64) // key: id, value: ev.OOM + for { + select { + case <-ctx.Done(): + w.Close() + return + case i := <-w.itemCh: + if i.err != nil { + delete(lastOOMMap, i.id) + continue + } + lastOOM := lastOOMMap[i.id] + if i.ev.OOM > lastOOM { + if err := w.publisher.Publish(ctx, runtime.TaskOOMEventTopic, &eventstypes.TaskOOM{ + ContainerID: i.id, + }); err != nil { + logrus.WithError(err).Error("publish OOM event") + } + } + if i.ev.OOM > 0 { + lastOOMMap[i.id] = i.ev.OOM + } + } + } +} + +// Add cgroups.Cgroup to the epoll monitor +func (w *watcher) Add(id string, cgx interface{}) error { + cg, ok := cgx.(*cgroupsv2.Manager) + if !ok { + return errors.Errorf("expected *cgroupsv2.Manager, got: %T", cgx) + } + // FIXME: cgroupsv2.Manager does not support closing eventCh routine currently. + // The routine shuts down when an error happens, mostly when the cgroup is deleted. + eventCh, errCh := cg.EventChan() + go func() { + for { + i := item{id: id} + select { + case ev := <-eventCh: + i.ev = ev + w.itemCh <- i + case err := <-errCh: + i.err = err + w.itemCh <- i + // we no longer get any event/err when we got an err + logrus.WithError(err).Warn("error from *cgroupsv2.Manager.EventChan") + return + } + } + }() + return nil +} diff --git a/runtime/v2/runc/v1/service.go b/runtime/v2/runc/v1/service.go index e5726d4359bb..151bdaba0854 100644 --- a/runtime/v2/runc/v1/service.go +++ b/runtime/v2/runc/v1/service.go @@ -35,6 +35,7 @@ import ( "github.com/containerd/containerd/mount" "github.com/containerd/containerd/namespaces" "github.com/containerd/containerd/pkg/oom" + oomv1 "github.com/containerd/containerd/pkg/oom/v1" "github.com/containerd/containerd/pkg/process" "github.com/containerd/containerd/pkg/stdio" "github.com/containerd/containerd/runtime/v2/runc" @@ -58,7 +59,7 @@ var ( // New returns a new shim service that can be used via GRPC func New(ctx context.Context, id string, publisher shim.Publisher, shutdown func()) (shim.Shim, error) { - ep, err := oom.New(publisher) + ep, err := oomv1.New(publisher) if err != nil { return nil, err } @@ -90,7 +91,7 @@ type service struct { events chan interface{} platform stdio.Platform ec chan runcC.Exit - ep *oom.Epoller + ep oom.Watcher id string container *runc.Container diff --git a/runtime/v2/runc/v2/service.go b/runtime/v2/runc/v2/service.go index a762838d688f..7b4e89b8685e 100644 --- a/runtime/v2/runc/v2/service.go +++ b/runtime/v2/runc/v2/service.go @@ -38,6 +38,8 @@ import ( "github.com/containerd/containerd/mount" "github.com/containerd/containerd/namespaces" "github.com/containerd/containerd/pkg/oom" + oomv1 "github.com/containerd/containerd/pkg/oom/v1" + oomv2 "github.com/containerd/containerd/pkg/oom/v2" "github.com/containerd/containerd/pkg/process" "github.com/containerd/containerd/pkg/stdio" "github.com/containerd/containerd/runtime/v2/runc" @@ -73,7 +75,15 @@ type spec struct { // New returns a new shim service that can be used via GRPC func New(ctx context.Context, id string, publisher shim.Publisher, shutdown func()) (shim.Shim, error) { - ep, err := oom.New(publisher) + var ( + ep oom.Watcher + err error + ) + if cgroups.Mode() == cgroups.Unified { + ep, err = oomv2.New(publisher) + } else { + ep, err = oomv1.New(publisher) + } if err != nil { return nil, err } @@ -106,7 +116,7 @@ type service struct { events chan interface{} platform stdio.Platform ec chan runcC.Exit - ep *oom.Epoller + ep oom.Watcher // id only used in cleanup case id string @@ -344,9 +354,9 @@ func (s *service) Start(ctx context.Context, r *taskAPI.StartRequest) (*taskAPI. logrus.WithError(err).Errorf("failed to enable controllers (%v)", allControllers) } } - - // OOM monitor is not implemented yet - logrus.WithError(errdefs.ErrNotImplemented).Warn("add cg to OOM monitor") + if err := s.ep.Add(container.ID, cg); err != nil { + logrus.WithError(err).Error("add cg to OOM monitor") + } } s.send(&eventstypes.TaskStart{ diff --git a/vendor.conf b/vendor.conf index 792aa1ee87da..c688d6674b34 100644 --- a/vendor.conf +++ b/vendor.conf @@ -2,7 +2,7 @@ github.com/beorn7/perks v1.0.1 github.com/BurntSushi/toml v0.3.1 github.com/cespare/xxhash/v2 v2.1.1 github.com/containerd/btrfs 153935315f4ab9be5bf03650a1341454b05efa5d -github.com/containerd/cgroups b4448137398923af7f4918b8b2ad8249172ca7a6 +github.com/containerd/cgroups 0dbf7f05ba59274095946e2c0c89540726e8a8aa github.com/containerd/console v1.0.0 github.com/containerd/continuity d3ef23f19fbb106bb73ffde425d07a9187e30745 github.com/containerd/fifo f15a3290365b9d2627d189e619ab4008e0069caf diff --git a/vendor/github.com/containerd/cgroups/README.md b/vendor/github.com/containerd/cgroups/README.md index 7fe2b1a17a0a..8fbed2482242 100644 --- a/vendor/github.com/containerd/cgroups/README.md +++ b/vendor/github.com/containerd/cgroups/README.md @@ -112,6 +112,27 @@ err := control.MoveTo(destination) subCgroup, err := control.New("child", resources) ``` +### Registering for memory events + +This allows you to get notified by an eventfd for v1 memory cgroups events. + +```go +event := cgroups.MemoryThresholdEvent(50 * 1024 * 1024, false) +efd, err := control.RegisterMemoryEvent(event) +``` + +```go +event := cgroups.MemoryPressureEvent(cgroups.MediumPressure, cgroups.DefaultMode) +efd, err := control.RegisterMemoryEvent(event) +``` + +```go +efd, err := control.OOMEventFD() +// or by using RegisterMemoryEvent +event := cgroups.OOMEvent() +efd, err := control.RegisterMemoryEvent(event) +``` + ### Attention All static path should not include `/sys/fs/cgroup/` prefix, it should start with your own cgroups name diff --git a/vendor/github.com/containerd/cgroups/cgroup.go b/vendor/github.com/containerd/cgroups/cgroup.go index 1cb1cfef568a..263f5438a7a0 100644 --- a/vendor/github.com/containerd/cgroups/cgroup.go +++ b/vendor/github.com/containerd/cgroups/cgroup.go @@ -458,7 +458,26 @@ func (c *cgroup) OOMEventFD() (uintptr, error) { if err != nil { return 0, err } - return s.(*memoryController).OOMEventFD(sp) + return s.(*memoryController).memoryEvent(sp, OOMEvent()) +} + +// RegisterMemoryEvent allows the ability to register for all v1 memory cgroups +// notifications. +func (c *cgroup) RegisterMemoryEvent(event MemoryEvent) (uintptr, error) { + c.mu.Lock() + defer c.mu.Unlock() + if c.err != nil { + return 0, c.err + } + s := c.getSubsystem(Memory) + if s == nil { + return 0, ErrMemoryNotSupported + } + sp, err := c.path(Memory) + if err != nil { + return 0, err + } + return s.(*memoryController).memoryEvent(sp, event) } // State returns the state of the cgroup and its processes diff --git a/vendor/github.com/containerd/cgroups/control.go b/vendor/github.com/containerd/cgroups/control.go index a024fd653186..a4cb9b832465 100644 --- a/vendor/github.com/containerd/cgroups/control.go +++ b/vendor/github.com/containerd/cgroups/control.go @@ -82,6 +82,9 @@ type Cgroup interface { Thaw() error // OOMEventFD returns the memory subsystem's event fd for OOM events OOMEventFD() (uintptr, error) + // RegisterMemoryEvent returns the memory subsystems event fd for whatever memory event was + // registered for. Can alternatively register for the oom event with this method. + RegisterMemoryEvent(MemoryEvent) (uintptr, error) // State returns the cgroups current state State() State // Subsystems returns all the subsystems in the cgroup diff --git a/vendor/github.com/containerd/cgroups/go.mod b/vendor/github.com/containerd/cgroups/go.mod index e6257f69ea9e..c58a3ae21fab 100644 --- a/vendor/github.com/containerd/cgroups/go.mod +++ b/vendor/github.com/containerd/cgroups/go.mod @@ -10,7 +10,7 @@ require ( github.com/godbus/dbus/v5 v5.0.3 github.com/gogo/protobuf v1.3.1 github.com/konsorten/go-windows-terminal-sequences v1.0.2 // indirect - github.com/opencontainers/runtime-spec v0.1.2-0.20190507144316-5b71a03e2700 + github.com/opencontainers/runtime-spec v1.0.2 github.com/pkg/errors v0.9.1 github.com/sirupsen/logrus v1.4.2 github.com/stretchr/testify v1.2.2 diff --git a/vendor/github.com/containerd/cgroups/hierarchy.go b/vendor/github.com/containerd/cgroups/hierarchy.go index 9221bf3f15c2..ca3f1b9380b7 100644 --- a/vendor/github.com/containerd/cgroups/hierarchy.go +++ b/vendor/github.com/containerd/cgroups/hierarchy.go @@ -16,5 +16,5 @@ package cgroups -// Hierarchy enableds both unified and split hierarchy for cgroups +// Hierarchy enables both unified and split hierarchy for cgroups type Hierarchy func() ([]Subsystem, error) diff --git a/vendor/github.com/containerd/cgroups/memory.go b/vendor/github.com/containerd/cgroups/memory.go index f39c008b2f0a..74ad3714d82d 100644 --- a/vendor/github.com/containerd/cgroups/memory.go +++ b/vendor/github.com/containerd/cgroups/memory.go @@ -32,6 +32,128 @@ import ( "golang.org/x/sys/unix" ) +// MemoryEvent is an interface that V1 memory Cgroup notifications implement. Arg returns the +// file name whose fd should be written to "cgroups.event_control". EventFile returns the name of +// the file that supports the notification api e.g. "memory.usage_in_bytes". +type MemoryEvent interface { + Arg() string + EventFile() string +} + +type memoryThresholdEvent struct { + threshold uint64 + swap bool +} + +// MemoryThresholdEvent returns a new memory threshold event to be used with RegisterMemoryEvent. +// If swap is true, the event will be registered using memory.memsw.usage_in_bytes +func MemoryThresholdEvent(threshold uint64, swap bool) MemoryEvent { + return &memoryThresholdEvent{ + threshold, + swap, + } +} + +func (m *memoryThresholdEvent) Arg() string { + return strconv.FormatUint(m.threshold, 10) +} + +func (m *memoryThresholdEvent) EventFile() string { + if m.swap { + return "memory.memsw.usage_in_bytes" + } + return "memory.usage_in_bytes" +} + +type oomEvent struct{} + +// OOMEvent returns a new oom event to be used with RegisterMemoryEvent. +func OOMEvent() MemoryEvent { + return &oomEvent{} +} + +func (oom *oomEvent) Arg() string { + return "" +} + +func (oom *oomEvent) EventFile() string { + return "memory.oom_control" +} + +type memoryPressureEvent struct { + pressureLevel MemoryPressureLevel + hierarchy EventNotificationMode +} + +// MemoryPressureEvent returns a new memory pressure event to be used with RegisterMemoryEvent. +func MemoryPressureEvent(pressureLevel MemoryPressureLevel, hierarchy EventNotificationMode) MemoryEvent { + return &memoryPressureEvent{ + pressureLevel, + hierarchy, + } +} + +func (m *memoryPressureEvent) Arg() string { + return string(m.pressureLevel) + "," + string(m.hierarchy) +} + +func (m *memoryPressureEvent) EventFile() string { + return "memory.pressure_level" +} + +// MemoryPressureLevel corresponds to the memory pressure levels defined +// for memory cgroups. +type MemoryPressureLevel string + +// The three memory pressure levels are as follows. +// - The "low" level means that the system is reclaiming memory for new +// allocations. Monitoring this reclaiming activity might be useful for +// maintaining cache level. Upon notification, the program (typically +// "Activity Manager") might analyze vmstat and act in advance (i.e. +// prematurely shutdown unimportant services). +// - The "medium" level means that the system is experiencing medium memory +// pressure, the system might be making swap, paging out active file caches, +// etc. Upon this event applications may decide to further analyze +// vmstat/zoneinfo/memcg or internal memory usage statistics and free any +// resources that can be easily reconstructed or re-read from a disk. +// - The "critical" level means that the system is actively thrashing, it is +// about to out of memory (OOM) or even the in-kernel OOM killer is on its +// way to trigger. Applications should do whatever they can to help the +// system. It might be too late to consult with vmstat or any other +// statistics, so it is advisable to take an immediate action. +// "https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt" Section 11 +const ( + LowPressure MemoryPressureLevel = "low" + MediumPressure MemoryPressureLevel = "medium" + CriticalPressure MemoryPressureLevel = "critical" +) + +// EventNotificationMode corresponds to the notification modes +// for the memory cgroups pressure level notifications. +type EventNotificationMode string + +// There are three optional modes that specify different propagation behavior: +// - "default": this is the default behavior specified above. This mode is the +// same as omitting the optional mode parameter, preserved by backwards +// compatibility. +// - "hierarchy": events always propagate up to the root, similar to the default +// behavior, except that propagation continues regardless of whether there are +// event listeners at each level, with the "hierarchy" mode. In the above +// example, groups A, B, and C will receive notification of memory pressure. +// - "local": events are pass-through, i.e. they only receive notifications when +// memory pressure is experienced in the memcg for which the notification is +// registered. In the above example, group C will receive notification if +// registered for "local" notification and the group experiences memory +// pressure. However, group B will never receive notification, regardless if +// there is an event listener for group C or not, if group B is registered for +// local notification. +// "https://www.kernel.org/doc/Documentation/cgroup-v1/memory.txt" Section 11 +const ( + DefaultMode EventNotificationMode = "default" + LocalMode EventNotificationMode = "local" + HierarchyMode EventNotificationMode = "hierarchy" +) + // NewMemory returns a Memory controller given the root folder of cgroups. // It may optionally accept other configuration options, such as IgnoreModules(...) func NewMemory(root string, options ...func(*memoryController)) *memoryController { @@ -201,34 +323,6 @@ func (m *memoryController) Stat(path string, stats *v1.Metrics) error { return nil } -func (m *memoryController) OOMEventFD(path string) (uintptr, error) { - root := m.Path(path) - f, err := os.Open(filepath.Join(root, "memory.oom_control")) - if err != nil { - return 0, err - } - defer f.Close() - fd, _, serr := unix.RawSyscall(unix.SYS_EVENTFD2, 0, unix.EFD_CLOEXEC, 0) - if serr != 0 { - return 0, serr - } - if err := writeEventFD(root, f.Fd(), fd); err != nil { - unix.Close(int(fd)) - return 0, err - } - return fd, nil -} - -func writeEventFD(root string, cfd, efd uintptr) error { - f, err := os.OpenFile(filepath.Join(root, "cgroup.event_control"), os.O_WRONLY, 0) - if err != nil { - return err - } - _, err = f.WriteString(fmt.Sprintf("%d %d", efd, cfd)) - f.Close() - return err -} - func (m *memoryController) parseStats(r io.Reader, stat *v1.MemoryStat) error { var ( raw = make(map[string]uint64) @@ -359,3 +453,24 @@ func getOomControlValue(mem *specs.LinuxMemory) *int64 { } return nil } + +func (m *memoryController) memoryEvent(path string, event MemoryEvent) (uintptr, error) { + root := m.Path(path) + efd, err := unix.Eventfd(0, unix.EFD_CLOEXEC) + if err != nil { + return 0, err + } + evtFile, err := os.Open(filepath.Join(root, event.EventFile())) + if err != nil { + unix.Close(efd) + return 0, err + } + defer evtFile.Close() + data := fmt.Sprintf("%d %d %s", efd, evtFile.Fd(), event.Arg()) + evctlPath := filepath.Join(root, "cgroup.event_control") + if err := ioutil.WriteFile(evctlPath, []byte(data), 0700); err != nil { + unix.Close(efd) + return 0, err + } + return uintptr(efd), nil +} diff --git a/vendor/github.com/containerd/cgroups/v2/manager.go b/vendor/github.com/containerd/cgroups/v2/manager.go index 7b984dd5a3eb..b1ec69ba45bf 100644 --- a/vendor/github.com/containerd/cgroups/v2/manager.go +++ b/vendor/github.com/containerd/cgroups/v2/manager.go @@ -166,6 +166,9 @@ func writeValues(path string, values []Value) error { } func NewManager(mountpoint string, group string, resources *Resources) (*Manager, error) { + if resources == nil { + return nil, errors.New("resources reference is nil") + } if err := VerifyGroupPath(group); err != nil { return nil, err } @@ -376,6 +379,12 @@ func (c *Manager) Stat() (*stats.Metrics, error) { return nil, err } } + memoryEvents := make(map[string]interface{}) + if err := readKVStatsFile(c.path, "memory.events", memoryEvents); err != nil { + if !os.IsNotExist(err) { + return nil, err + } + } var metrics stats.Metrics metrics.Pids = &stats.PidsStat{ @@ -427,7 +436,15 @@ func (c *Manager) Stat() (*stats.Metrics, error) { SwapUsage: getStatFileContentUint64(filepath.Join(c.path, "memory.swap.current")), SwapLimit: getStatFileContentUint64(filepath.Join(c.path, "memory.swap.max")), } - + if len(memoryEvents) > 0 { + metrics.MemoryEvents = &stats.MemoryEvents{ + Low: getUint64Value("low", memoryEvents), + High: getUint64Value("high", memoryEvents), + Max: getUint64Value("max", memoryEvents), + Oom: getUint64Value("oom", memoryEvents), + OomKill: getUint64Value("oom_kill", memoryEvents), + } + } metrics.Io = &stats.IOStat{Usage: readIoStats(c.path)} metrics.Rdma = &stats.RdmaStat{ Current: rdmaStats(filepath.Join(c.path, "rdma.current")), @@ -572,15 +589,44 @@ func (c *Manager) waitForEvents(ec chan<- Event, errCh chan<- error) { errCh <- err return } - var out map[string]interface{} if bytesRead >= syscall.SizeofInotifyEvent { - if err := readKVStatsFile(c.path, "memory.events", out); err != nil { - e := Event{ - High: out["high"].(uint64), - Low: out["low"].(uint64), - Max: out["max"].(uint64), - OOM: out["oom"].(uint64), - OOMKill: out["oom_kill"].(uint64), + out := make(map[string]interface{}) + if err := readKVStatsFile(c.path, "memory.events", out); err == nil { + e := Event{} + if v, ok := out["high"]; ok { + e.High, ok = v.(uint64) + if !ok { + errCh <- errors.Errorf("cannot convert high to uint64: %+v", v) + return + } + } + if v, ok := out["low"]; ok { + e.Low, ok = v.(uint64) + if !ok { + errCh <- errors.Errorf("cannot convert low to uint64: %+v", v) + return + } + } + if v, ok := out["max"]; ok { + e.Max, ok = v.(uint64) + if !ok { + errCh <- errors.Errorf("cannot convert max to uint64: %+v", v) + return + } + } + if v, ok := out["oom"]; ok { + e.OOM, ok = v.(uint64) + if !ok { + errCh <- errors.Errorf("cannot convert oom to uint64: %+v", v) + return + } + } + if v, ok := out["oom_kill"]; ok { + e.OOMKill, ok = v.(uint64) + if !ok { + errCh <- errors.Errorf("cannot convert oom_kill to uint64: %+v", v) + return + } } ec <- e } else { diff --git a/vendor/github.com/containerd/cgroups/v2/stats/metrics.pb.go b/vendor/github.com/containerd/cgroups/v2/stats/metrics.pb.go index 9d5a1e774000..dd54edb69a1f 100644 --- a/vendor/github.com/containerd/cgroups/v2/stats/metrics.pb.go +++ b/vendor/github.com/containerd/cgroups/v2/stats/metrics.pb.go @@ -31,6 +31,7 @@ type Metrics struct { Rdma *RdmaStat `protobuf:"bytes,5,opt,name=rdma,proto3" json:"rdma,omitempty"` Io *IOStat `protobuf:"bytes,6,opt,name=io,proto3" json:"io,omitempty"` Hugetlb []*HugeTlbStat `protobuf:"bytes,7,rep,name=hugetlb,proto3" json:"hugetlb,omitempty"` + MemoryEvents *MemoryEvents `protobuf:"bytes,8,opt,name=memory_events,json=memoryEvents,proto3" json:"memory_events,omitempty"` XXX_NoUnkeyedLiteral struct{} `json:"-"` XXX_unrecognized []byte `json:"-"` XXX_sizecache int32 `json:"-"` @@ -225,6 +226,49 @@ func (m *MemoryStat) XXX_DiscardUnknown() { var xxx_messageInfo_MemoryStat proto.InternalMessageInfo +type MemoryEvents struct { + Low uint64 `protobuf:"varint,1,opt,name=low,proto3" json:"low,omitempty"` + High uint64 `protobuf:"varint,2,opt,name=high,proto3" json:"high,omitempty"` + Max uint64 `protobuf:"varint,3,opt,name=max,proto3" json:"max,omitempty"` + Oom uint64 `protobuf:"varint,4,opt,name=oom,proto3" json:"oom,omitempty"` + OomKill uint64 `protobuf:"varint,5,opt,name=oom_kill,json=oomKill,proto3" json:"oom_kill,omitempty"` + XXX_NoUnkeyedLiteral struct{} `json:"-"` + XXX_unrecognized []byte `json:"-"` + XXX_sizecache int32 `json:"-"` +} + +func (m *MemoryEvents) Reset() { *m = MemoryEvents{} } +func (*MemoryEvents) ProtoMessage() {} +func (*MemoryEvents) Descriptor() ([]byte, []int) { + return fileDescriptor_2fc6005842049e6b, []int{4} +} +func (m *MemoryEvents) XXX_Unmarshal(b []byte) error { + return m.Unmarshal(b) +} +func (m *MemoryEvents) XXX_Marshal(b []byte, deterministic bool) ([]byte, error) { + if deterministic { + return xxx_messageInfo_MemoryEvents.Marshal(b, m, deterministic) + } else { + b = b[:cap(b)] + n, err := m.MarshalTo(b) + if err != nil { + return nil, err + } + return b[:n], nil + } +} +func (m *MemoryEvents) XXX_Merge(src proto.Message) { + xxx_messageInfo_MemoryEvents.Merge(m, src) +} +func (m *MemoryEvents) XXX_Size() int { + return m.Size() +} +func (m *MemoryEvents) XXX_DiscardUnknown() { + xxx_messageInfo_MemoryEvents.DiscardUnknown(m) +} + +var xxx_messageInfo_MemoryEvents proto.InternalMessageInfo + type RdmaStat struct { Current []*RdmaEntry `protobuf:"bytes,1,rep,name=current,proto3" json:"current,omitempty"` Limit []*RdmaEntry `protobuf:"bytes,2,rep,name=limit,proto3" json:"limit,omitempty"` @@ -236,7 +280,7 @@ type RdmaStat struct { func (m *RdmaStat) Reset() { *m = RdmaStat{} } func (*RdmaStat) ProtoMessage() {} func (*RdmaStat) Descriptor() ([]byte, []int) { - return fileDescriptor_2fc6005842049e6b, []int{4} + return fileDescriptor_2fc6005842049e6b, []int{5} } func (m *RdmaStat) XXX_Unmarshal(b []byte) error { return m.Unmarshal(b) @@ -277,7 +321,7 @@ type RdmaEntry struct { func (m *RdmaEntry) Reset() { *m = RdmaEntry{} } func (*RdmaEntry) ProtoMessage() {} func (*RdmaEntry) Descriptor() ([]byte, []int) { - return fileDescriptor_2fc6005842049e6b, []int{5} + return fileDescriptor_2fc6005842049e6b, []int{6} } func (m *RdmaEntry) XXX_Unmarshal(b []byte) error { return m.Unmarshal(b) @@ -316,7 +360,7 @@ type IOStat struct { func (m *IOStat) Reset() { *m = IOStat{} } func (*IOStat) ProtoMessage() {} func (*IOStat) Descriptor() ([]byte, []int) { - return fileDescriptor_2fc6005842049e6b, []int{6} + return fileDescriptor_2fc6005842049e6b, []int{7} } func (m *IOStat) XXX_Unmarshal(b []byte) error { return m.Unmarshal(b) @@ -360,7 +404,7 @@ type IOEntry struct { func (m *IOEntry) Reset() { *m = IOEntry{} } func (*IOEntry) ProtoMessage() {} func (*IOEntry) Descriptor() ([]byte, []int) { - return fileDescriptor_2fc6005842049e6b, []int{7} + return fileDescriptor_2fc6005842049e6b, []int{8} } func (m *IOEntry) XXX_Unmarshal(b []byte) error { return m.Unmarshal(b) @@ -401,7 +445,7 @@ type HugeTlbStat struct { func (m *HugeTlbStat) Reset() { *m = HugeTlbStat{} } func (*HugeTlbStat) ProtoMessage() {} func (*HugeTlbStat) Descriptor() ([]byte, []int) { - return fileDescriptor_2fc6005842049e6b, []int{8} + return fileDescriptor_2fc6005842049e6b, []int{9} } func (m *HugeTlbStat) XXX_Unmarshal(b []byte) error { return m.Unmarshal(b) @@ -435,6 +479,7 @@ func init() { proto.RegisterType((*PidsStat)(nil), "io.containerd.cgroups.v2.PidsStat") proto.RegisterType((*CPUStat)(nil), "io.containerd.cgroups.v2.CPUStat") proto.RegisterType((*MemoryStat)(nil), "io.containerd.cgroups.v2.MemoryStat") + proto.RegisterType((*MemoryEvents)(nil), "io.containerd.cgroups.v2.MemoryEvents") proto.RegisterType((*RdmaStat)(nil), "io.containerd.cgroups.v2.RdmaStat") proto.RegisterType((*RdmaEntry)(nil), "io.containerd.cgroups.v2.RdmaEntry") proto.RegisterType((*IOStat)(nil), "io.containerd.cgroups.v2.IOStat") @@ -447,77 +492,82 @@ func init() { } var fileDescriptor_2fc6005842049e6b = []byte{ - // 1118 bytes of a gzipped FileDescriptorProto - 0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x56, 0x4d, 0x6f, 0x1c, 0x45, - 0x10, 0xcd, 0xda, 0x9b, 0xfd, 0xe8, 0xb5, 0x13, 0xa7, 0xe3, 0x84, 0x4e, 0x42, 0xd6, 0xf6, 0x86, - 0xa0, 0x20, 0xc1, 0x2e, 0x32, 0x5f, 0x02, 0x05, 0x21, 0x27, 0x10, 0x05, 0x09, 0x13, 0x6b, 0xe2, - 0x15, 0xc7, 0x51, 0xef, 0x4c, 0x7b, 0x76, 0xec, 0xf9, 0x52, 0x77, 0x8f, 0xcd, 0xe6, 0xc4, 0x81, - 0x2b, 0xe2, 0x6f, 0xe5, 0x06, 0x47, 0x4e, 0x88, 0xf8, 0xc4, 0xcf, 0x40, 0x55, 0xd5, 0xb3, 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i, uint64(m.MemoryEvents.Size())) + n6, err := m.MemoryEvents.MarshalTo(dAtA[i:]) + if err != nil { + return 0, err + } + i += n6 + } if m.XXX_unrecognized != nil { i += copy(dAtA[i:], m.XXX_unrecognized) } @@ -921,6 +981,52 @@ func (m *MemoryStat) MarshalTo(dAtA []byte) (int, error) { return i, nil } +func (m *MemoryEvents) Marshal() (dAtA []byte, err error) { + size := m.Size() + dAtA = make([]byte, size) + n, err := m.MarshalTo(dAtA) + if err != nil { + return nil, err + } + return dAtA[:n], nil +} + +func (m *MemoryEvents) MarshalTo(dAtA []byte) (int, error) { + var i int + _ = i + var l int + _ = l + if m.Low != 0 { + dAtA[i] = 0x8 + i++ + i = encodeVarintMetrics(dAtA, i, uint64(m.Low)) + } + if m.High != 0 { + dAtA[i] = 0x10 + i++ + i = encodeVarintMetrics(dAtA, i, uint64(m.High)) + } + if m.Max != 0 { + dAtA[i] = 0x18 + i++ + i = encodeVarintMetrics(dAtA, i, uint64(m.Max)) + } + if m.Oom != 0 { + dAtA[i] = 0x20 + i++ + i = encodeVarintMetrics(dAtA, i, uint64(m.Oom)) + } + if m.OomKill != 0 { + dAtA[i] = 0x28 + i++ + i = encodeVarintMetrics(dAtA, i, uint64(m.OomKill)) + } + if m.XXX_unrecognized != nil { + i += copy(dAtA[i:], m.XXX_unrecognized) + } + return i, nil +} + func (m *RdmaStat) Marshal() (dAtA []byte, err error) { size := m.Size() dAtA = make([]byte, size) @@ -1165,6 +1271,10 @@ func (m *Metrics) Size() (n int) { n += 1 + l + sovMetrics(uint64(l)) } } + if m.MemoryEvents != nil { + l = m.MemoryEvents.Size() + n += 1 + l + sovMetrics(uint64(l)) + } if m.XXX_unrecognized != nil { n += len(m.XXX_unrecognized) } @@ -1336,6 +1446,33 @@ func (m *MemoryStat) Size() (n int) { return n } +func (m *MemoryEvents) Size() (n int) { + if m == nil { + return 0 + } + var l int + _ = l + if m.Low != 0 { + n += 1 + sovMetrics(uint64(m.Low)) + } + if m.High != 0 { + n += 1 + sovMetrics(uint64(m.High)) + } + if m.Max != 0 { + n += 1 + sovMetrics(uint64(m.Max)) + } + if m.Oom != 0 { + n += 1 + sovMetrics(uint64(m.Oom)) + } + if m.OomKill != 0 { + n += 1 + sovMetrics(uint64(m.OomKill)) + } + if m.XXX_unrecognized != nil { + n += len(m.XXX_unrecognized) + } + return n +} + func (m *RdmaStat) Size() (n int) { if m == nil { return 0 @@ -1476,6 +1613,7 @@ func (this *Metrics) String() string { `Rdma:` + strings.Replace(fmt.Sprintf("%v", this.Rdma), "RdmaStat", "RdmaStat", 1) + `,`, `Io:` + strings.Replace(fmt.Sprintf("%v", this.Io), "IOStat", "IOStat", 1) + `,`, `Hugetlb:` + strings.Replace(fmt.Sprintf("%v", this.Hugetlb), "HugeTlbStat", "HugeTlbStat", 1) + `,`, + `MemoryEvents:` + strings.Replace(fmt.Sprintf("%v", this.MemoryEvents), "MemoryEvents", "MemoryEvents", 1) + `,`, `XXX_unrecognized:` + fmt.Sprintf("%v", this.XXX_unrecognized) + `,`, `}`, }, "") @@ -1554,6 +1692,21 @@ func (this *MemoryStat) String() string { }, "") return s } +func (this *MemoryEvents) String() string { + if this == nil { + return "nil" + } + s := strings.Join([]string{`&MemoryEvents{`, + `Low:` + fmt.Sprintf("%v", this.Low) + `,`, + `High:` + fmt.Sprintf("%v", this.High) + `,`, + `Max:` + fmt.Sprintf("%v", this.Max) + `,`, + `Oom:` + fmt.Sprintf("%v", this.Oom) + `,`, + `OomKill:` + fmt.Sprintf("%v", this.OomKill) + `,`, + `XXX_unrecognized:` + fmt.Sprintf("%v", this.XXX_unrecognized) + `,`, + `}`, + }, "") + return s +} func (this *RdmaStat) String() string { if this == nil { return "nil" @@ -1870,6 +2023,42 @@ func (m *Metrics) Unmarshal(dAtA []byte) error { return err } iNdEx = postIndex + case 8: + if wireType != 2 { + return fmt.Errorf("proto: wrong wireType = %d for field MemoryEvents", wireType) + } + var msglen int + for shift := uint(0); ; shift += 7 { + if shift >= 64 { + return ErrIntOverflowMetrics + } + if iNdEx >= l { + return io.ErrUnexpectedEOF + } + b := dAtA[iNdEx] + iNdEx++ + msglen |= int(b&0x7F) << shift + if b < 0x80 { + break + } + } + if msglen < 0 { + return ErrInvalidLengthMetrics + } + postIndex := iNdEx + msglen + if postIndex < 0 { + return ErrInvalidLengthMetrics + } + if postIndex > l { + return io.ErrUnexpectedEOF + } + if m.MemoryEvents == nil { + m.MemoryEvents = &MemoryEvents{} + } + if err := m.MemoryEvents.Unmarshal(dAtA[iNdEx:postIndex]); err != nil { + return err + } + iNdEx = postIndex default: iNdEx = preIndex skippy, err := skipMetrics(dAtA[iNdEx:]) @@ -2874,6 +3063,155 @@ func (m *MemoryStat) Unmarshal(dAtA []byte) error { } return nil } +func (m *MemoryEvents) Unmarshal(dAtA []byte) error { + l := len(dAtA) + iNdEx := 0 + for iNdEx < l { + preIndex := iNdEx + var wire uint64 + for shift := uint(0); ; shift += 7 { + if shift >= 64 { + return ErrIntOverflowMetrics + } + if iNdEx >= l { + return io.ErrUnexpectedEOF + } + b := dAtA[iNdEx] + iNdEx++ + wire |= uint64(b&0x7F) << shift + if b < 0x80 { + break + } + } + fieldNum := int32(wire >> 3) + wireType := int(wire & 0x7) + if wireType == 4 { + return fmt.Errorf("proto: MemoryEvents: wiretype end group for non-group") + } + if fieldNum <= 0 { + return fmt.Errorf("proto: MemoryEvents: illegal tag %d (wire type %d)", fieldNum, wire) + } + switch fieldNum { + case 1: + if wireType != 0 { + return fmt.Errorf("proto: wrong wireType = %d for field Low", wireType) + } + m.Low = 0 + for shift := uint(0); ; shift += 7 { + if shift >= 64 { + return ErrIntOverflowMetrics + } + if iNdEx >= l { + return io.ErrUnexpectedEOF + } + b := dAtA[iNdEx] + iNdEx++ + m.Low |= uint64(b&0x7F) << shift + if b < 0x80 { + break + } + } + case 2: + if wireType != 0 { + return fmt.Errorf("proto: wrong wireType = %d for field High", wireType) + } + m.High = 0 + for shift := uint(0); ; shift += 7 { + if shift >= 64 { + return ErrIntOverflowMetrics + } + if iNdEx >= l { + return io.ErrUnexpectedEOF + } + b := dAtA[iNdEx] + iNdEx++ + m.High |= uint64(b&0x7F) << shift + if b < 0x80 { + break + } + } + case 3: + if wireType != 0 { + return fmt.Errorf("proto: wrong wireType = %d for field Max", wireType) + } + m.Max = 0 + for shift := uint(0); ; shift += 7 { + if shift >= 64 { + return ErrIntOverflowMetrics + } + if iNdEx >= l { + return io.ErrUnexpectedEOF + } + b := dAtA[iNdEx] + iNdEx++ + m.Max |= uint64(b&0x7F) << shift + if b < 0x80 { + break + } + } + case 4: + if wireType != 0 { + return fmt.Errorf("proto: wrong wireType = %d for field Oom", wireType) + } + m.Oom = 0 + for shift := uint(0); ; shift += 7 { + if shift >= 64 { + return ErrIntOverflowMetrics + } + if iNdEx >= l { + return io.ErrUnexpectedEOF + } + b := dAtA[iNdEx] + iNdEx++ + m.Oom |= uint64(b&0x7F) << shift + if b < 0x80 { + break + } + } + case 5: + if wireType != 0 { + return fmt.Errorf("proto: wrong wireType = %d for field OomKill", wireType) + } + m.OomKill = 0 + for shift := uint(0); ; shift += 7 { + if shift >= 64 { + return ErrIntOverflowMetrics + } + if iNdEx >= l { + return io.ErrUnexpectedEOF + } + b := dAtA[iNdEx] + iNdEx++ + m.OomKill |= uint64(b&0x7F) << shift + if b < 0x80 { + break + } + } + default: + iNdEx = preIndex + skippy, err := skipMetrics(dAtA[iNdEx:]) + if err != nil { + return err + } + if skippy < 0 { + return ErrInvalidLengthMetrics + } + if (iNdEx + skippy) < 0 { + return ErrInvalidLengthMetrics + } + if (iNdEx + skippy) > l { + return io.ErrUnexpectedEOF + } + m.XXX_unrecognized = append(m.XXX_unrecognized, dAtA[iNdEx:iNdEx+skippy]...) + iNdEx += skippy + } + } + + if iNdEx > l { + return io.ErrUnexpectedEOF + } + return nil +} func (m *RdmaStat) Unmarshal(dAtA []byte) error { l := len(dAtA) iNdEx := 0 diff --git a/vendor/github.com/containerd/cgroups/v2/stats/metrics.proto b/vendor/github.com/containerd/cgroups/v2/stats/metrics.proto index 4a853539937b..8ac472e46459 100644 --- a/vendor/github.com/containerd/cgroups/v2/stats/metrics.proto +++ b/vendor/github.com/containerd/cgroups/v2/stats/metrics.proto @@ -11,6 +11,7 @@ message Metrics { RdmaStat rdma = 5; IOStat io = 6; repeated HugeTlbStat hugetlb = 7; + MemoryEvents memory_events = 8; } message PidsStat { @@ -65,6 +66,14 @@ message MemoryStat { uint64 swap_limit = 35; } +message MemoryEvents { + uint64 low = 1; + uint64 high = 2; + uint64 max = 3; + uint64 oom = 4; + uint64 oom_kill = 5; +} + message RdmaStat { repeated RdmaEntry current = 1; repeated RdmaEntry limit = 2;