bump containerd/cgroups 5fbad35c2a7e855762d3c60f2e474ffcad0d470a

full diff: https://github.com/containerd/cgroups/compare/c4b9ac5c7601384c965b9646fc515884e091ebb9...5fbad35c2a7e855762d3c60f2e474ffcad0d470a

- containerd/cgroups#82 Add go module support
- containerd/cgroups#96 Move metrics proto package to stats/v1
- containerd/cgroups#97 Allow overriding the default /proc folder in blkioController
- containerd/cgroups#98 Allows ignoring memory modules
- containerd/cgroups#99 Add Go 1.13 to Travis
- containerd/cgroups#100 stats/v1: export per-cgroup stats

Signed-off-by: Sebastiaan van Stijn <github@gone.nl>

daemon/daemon_unix.go

@@ -16,7 +16,7 @@ import (
 	"strings"
 	"time"
 
-	containerd_cgroups "github.com/containerd/cgroups"
+	v1 "github.com/containerd/cgroups/stats/v1"
 	"github.com/docker/docker/api/types"
 	"github.com/docker/docker/api/types/blkiodev"
 	pblkiodev "github.com/docker/docker/api/types/blkiodev"
@@ -1376,7 +1376,7 @@ func (daemon *Daemon) conditionalUnmountOnCleanup(container *container.Container
 	return daemon.Unmount(container)
 }
 
-func copyBlkioEntry(entries []*containerd_cgroups.BlkIOEntry) []types.BlkioStatEntry {
+func copyBlkioEntry(entries []*v1.BlkIOEntry) []types.BlkioStatEntry {
 	out := make([]types.BlkioStatEntry, len(entries))
 	for i, re := range entries {
 		out[i] = types.BlkioStatEntry{

libcontainerd/types/types_linux.go

@@ -3,7 +3,7 @@ package types // import "github.com/docker/docker/libcontainerd/types"
 import (
 	"time"
 
-	"github.com/containerd/cgroups"
+	v1 "github.com/containerd/cgroups/stats/v1"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
 )
 
@@ -13,13 +13,13 @@ type Summary struct{}
 // Stats holds metrics properties as returned by containerd
 type Stats struct {
 	Read    time.Time
-	Metrics *cgroups.Metrics
+	Metrics *v1.Metrics
 }
 
 // InterfaceToStats returns a stats object from the platform-specific interface.
 func InterfaceToStats(read time.Time, v interface{}) *Stats {
 	return &Stats{
-		Metrics: v.(*cgroups.Metrics),
+		Metrics: v.(*v1.Metrics),
 		Read:    read,
 	}
 }

vendor.conf

@@ -120,7 +120,7 @@ google.golang.org/genproto                          694d95ba50e67b2e363f3483057d
 github.com/containerd/containerd                    36cf5b690dcc00ff0f34ff7799209050c3d0c59a # v1.3.0
 github.com/containerd/fifo                          bda0ff6ed73c67bfb5e62bc9c697f146b7fd7f13
 github.com/containerd/continuity                    f2a389ac0a02ce21c09edd7344677a601970f41c
-github.com/containerd/cgroups                       c4b9ac5c7601384c965b9646fc515884e091ebb9
+github.com/containerd/cgroups                       5fbad35c2a7e855762d3c60f2e474ffcad0d470a
 github.com/containerd/console                       0650fd9eeb50bab4fc99dceb9f2e14cf58f36e7f
 github.com/containerd/go-runc                       e029b79d8cda8374981c64eba71f28ec38e5526f
 github.com/containerd/typeurl                       2a93cfde8c20b23de8eb84a5adbc234ddf7a9e8d

vendor/github.com/containerd/cgroups/blkio.go

@@ -26,17 +26,33 @@ import (
 	"strconv"
 	"strings"
 
+	v1 "github.com/containerd/cgroups/stats/v1"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
 )
 
-func NewBlkio(root string) *blkioController {
-	return &blkioController{
-		root: filepath.Join(root, string(Blkio)),
+// NewBlkio returns a Blkio controller given the root folder of cgroups.
+// It may optionally accept other configuration options, such as ProcRoot(path)
+func NewBlkio(root string, options ...func(controller *blkioController)) *blkioController {
+	ctrl := &blkioController{
+		root:     filepath.Join(root, string(Blkio)),
+		procRoot: "/proc",
+	}
+	for _, opt := range options {
+		opt(ctrl)
+	}
+	return ctrl
+}
+
+// ProcRoot overrides the default location of the "/proc" filesystem
+func ProcRoot(path string) func(controller *blkioController) {
+	return func(c *blkioController) {
+		c.procRoot = path
 	}
 }
 
 type blkioController struct {
-	root string
+	root     string
+	procRoot string
 }
 
 func (b *blkioController) Name() Name {
@@ -72,8 +88,8 @@ func (b *blkioController) Update(path string, resources *specs.LinuxResources) e
 	return b.Create(path, resources)
 }
 
-func (b *blkioController) Stat(path string, stats *Metrics) error {
-	stats.Blkio = &BlkIOStat{}
+func (b *blkioController) Stat(path string, stats *v1.Metrics) error {
+	stats.Blkio = &v1.BlkIOStat{}
 	settings := []blkioStatSettings{
 		{
 			name:  "throttle.io_serviced",
@@ -122,7 +138,7 @@ func (b *blkioController) Stat(path string, stats *Metrics) error {
 			},
 		)
 	}
-	f, err := os.Open("/proc/diskstats")
+	f, err := os.Open(filepath.Join(b.procRoot, "diskstats"))
 	if err != nil {
 		return err
 	}
@@ -141,7 +157,7 @@ func (b *blkioController) Stat(path string, stats *Metrics) error {
 	return nil
 }
 
-func (b *blkioController) readEntry(devices map[deviceKey]string, path, name string, entry *[]*BlkIOEntry) error {
+func (b *blkioController) readEntry(devices map[deviceKey]string, path, name string, entry *[]*v1.BlkIOEntry) error {
 	f, err := os.Open(filepath.Join(b.Path(path), fmt.Sprintf("blkio.%s", name)))
 	if err != nil {
 		return err
@@ -180,7 +196,7 @@ func (b *blkioController) readEntry(devices map[deviceKey]string, path, name str
 		if err != nil {
 			return err
 		}
-		*entry = append(*entry, &BlkIOEntry{
+		*entry = append(*entry, &v1.BlkIOEntry{
 			Device: devices[deviceKey{major, minor}],
 			Major:  major,
 			Minor:  minor,
@@ -268,7 +284,7 @@ type blkioSettings struct {
 
 type blkioStatSettings struct {
 	name  string
-	entry *[]*BlkIOEntry
+	entry *[]*v1.BlkIOEntry
 }
 
 func uintf(v interface{}) []byte {

vendor/github.com/containerd/cgroups/cgroup.go

@@ -25,6 +25,7 @@ import (
 	"strings"
 	"sync"
 
+	v1 "github.com/containerd/cgroups/stats/v1"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
 	"github.com/pkg/errors"
 )
@@ -246,7 +247,7 @@ func (c *cgroup) Delete() error {
 }
 
 // Stat returns the current metrics for the cgroup
-func (c *cgroup) Stat(handlers ...ErrorHandler) (*Metrics, error) {
+func (c *cgroup) Stat(handlers ...ErrorHandler) (*v1.Metrics, error) {
 	c.mu.Lock()
 	defer c.mu.Unlock()
 	if c.err != nil {
@@ -256,10 +257,10 @@ func (c *cgroup) Stat(handlers ...ErrorHandler) (*Metrics, error) {
 		handlers = append(handlers, errPassthrough)
 	}
 	var (
-		stats = &Metrics{
-			CPU: &CPUStat{
-				Throttling: &Throttle{},
-				Usage:      &CPUUsage{},
+		stats = &v1.Metrics{
+			CPU: &v1.CPUStat{
+				Throttling: &v1.Throttle{},
+				Usage:      &v1.CPUUsage{},
 			},
 		}
 		wg   = &sync.WaitGroup{}

vendor/github.com/containerd/cgroups/control.go

@@ -19,6 +19,7 @@ package cgroups
 import (
 	"os"
 
+	v1 "github.com/containerd/cgroups/stats/v1"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
 )
 
@@ -68,7 +69,7 @@ type Cgroup interface {
 	// subsystems are moved one at a time
 	MoveTo(Cgroup) error
 	// Stat returns the stats for all subsystems in the cgroup
-	Stat(...ErrorHandler) (*Metrics, error)
+	Stat(...ErrorHandler) (*v1.Metrics, error)
 	// Update updates all the subsystems with the provided resource changes
 	Update(resources *specs.LinuxResources) error
 	// Processes returns all the processes in a select subsystem for the cgroup

vendor/github.com/containerd/cgroups/cpu.go

@@ -24,6 +24,7 @@ import (
 	"path/filepath"
 	"strconv"
 
+	v1 "github.com/containerd/cgroups/stats/v1"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
 )
 
@@ -100,7 +101,7 @@ func (c *cpuController) Update(path string, resources *specs.LinuxResources) err
 	return c.Create(path, resources)
 }
 
-func (c *cpuController) Stat(path string, stats *Metrics) error {
+func (c *cpuController) Stat(path string, stats *v1.Metrics) error {
 	f, err := os.Open(filepath.Join(c.Path(path), "cpu.stat"))
 	if err != nil {
 		return err

vendor/github.com/containerd/cgroups/cpuacct.go

@@ -22,6 +22,8 @@ import (
 	"path/filepath"
 	"strconv"
 	"strings"
+
+	v1 "github.com/containerd/cgroups/stats/v1"
 )
 
 const nanosecondsInSecond = 1000000000
@@ -46,7 +48,7 @@ func (c *cpuacctController) Path(path string) string {
 	return filepath.Join(c.root, path)
 }
 
-func (c *cpuacctController) Stat(path string, stats *Metrics) error {
+func (c *cpuacctController) Stat(path string, stats *v1.Metrics) error {
 	user, kernel, err := c.getUsage(path)
 	if err != nil {
 		return err

vendor/github.com/containerd/cgroups/go.mod

@@ -0,0 +1,13 @@
+module github.com/containerd/cgroups
+
+go 1.12
+
+require (
+	github.com/coreos/go-systemd v0.0.0-20190321100706-95778dfbb74e
+	github.com/docker/go-units v0.4.0
+	github.com/godbus/dbus v0.0.0-20190422162347-ade71ed3457e
+	github.com/gogo/protobuf v1.2.1
+	github.com/opencontainers/runtime-spec v0.1.2-0.20190507144316-5b71a03e2700
+	github.com/pkg/errors v0.8.1
+	golang.org/x/sys v0.0.0-20190514135907-3a4b5fb9f71f
+)

vendor/github.com/containerd/cgroups/hugetlb.go

@@ -23,6 +23,7 @@ import (
 	"strconv"
 	"strings"
 
+	v1 "github.com/containerd/cgroups/stats/v1"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
 )
 
@@ -67,7 +68,7 @@ func (h *hugetlbController) Create(path string, resources *specs.LinuxResources)
 	return nil
 }
 
-func (h *hugetlbController) Stat(path string, stats *Metrics) error {
+func (h *hugetlbController) Stat(path string, stats *v1.Metrics) error {
 	for _, size := range h.sizes {
 		s, err := h.readSizeStat(path, size)
 		if err != nil {
@@ -78,8 +79,8 @@ func (h *hugetlbController) Stat(path string, stats *Metrics) error {
 	return nil
 }
 
-func (h *hugetlbController) readSizeStat(path, size string) (*HugetlbStat, error) {
-	s := HugetlbStat{
+func (h *hugetlbController) readSizeStat(path, size string) (*v1.HugetlbStat, error) {
+	s := v1.HugetlbStat{
 		Pagesize: size,
 	}
 	for _, t := range []struct {

vendor/github.com/containerd/cgroups/memory.go

@@ -27,19 +27,48 @@ import (
 	"strings"
 	"syscall"
 
-	"golang.org/x/sys/unix"
-
+	v1 "github.com/containerd/cgroups/stats/v1"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
+	"golang.org/x/sys/unix"
 )
 
-func NewMemory(root string) *memoryController {
-	return &memoryController{
-		root: filepath.Join(root, string(Memory)),
+// 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 {
+	mc := &memoryController{
+		root:    filepath.Join(root, string(Memory)),
+		ignored: map[string]struct{}{},
+	}
+	for _, opt := range options {
+		opt(mc)
+	}
+	return mc
+}
+
+// IgnoreModules configure the memory controller to not read memory metrics for some
+// module names (e.g. passing "memsw" would avoid all the memory.memsw.* entries)
+func IgnoreModules(names ...string) func(*memoryController) {
+	return func(mc *memoryController) {
+		for _, name := range names {
+			mc.ignored[name] = struct{}{}
+		}
+	}
+}
+
+// OptionalSwap allows the memory controller to not fail if cgroups is not accounting
+// Swap memory (there are no memory.memsw.* entries)
+func OptionalSwap() func(*memoryController) {
+	return func(mc *memoryController) {
+		_, err := os.Stat(filepath.Join(mc.root, "memory.memsw.usage_in_bytes"))
+		if os.IsNotExist(err) {
+			mc.ignored["memsw"] = struct{}{}
+		}
 	}
 }
 
 type memoryController struct {
-	root string
+	root    string
+	ignored map[string]struct{}
 }
 
 func (m *memoryController) Name() Name {
@@ -97,24 +126,24 @@ func (m *memoryController) Update(path string, resources *specs.LinuxResources)
 	return m.set(path, settings)
 }
 
-func (m *memoryController) Stat(path string, stats *Metrics) error {
+func (m *memoryController) Stat(path string, stats *v1.Metrics) error {
 	f, err := os.Open(filepath.Join(m.Path(path), "memory.stat"))
 	if err != nil {
 		return err
 	}
 	defer f.Close()
-	stats.Memory = &MemoryStat{
-		Usage:     &MemoryEntry{},
-		Swap:      &MemoryEntry{},
-		Kernel:    &MemoryEntry{},
-		KernelTCP: &MemoryEntry{},
+	stats.Memory = &v1.MemoryStat{
+		Usage:     &v1.MemoryEntry{},
+		Swap:      &v1.MemoryEntry{},
+		Kernel:    &v1.MemoryEntry{},
+		KernelTCP: &v1.MemoryEntry{},
 	}
 	if err := m.parseStats(f, stats.Memory); err != nil {
 		return err
 	}
 	for _, t := range []struct {
 		module string
-		entry  *MemoryEntry
+		entry  *v1.MemoryEntry
 	}{
 		{
 			module: "",
@@ -133,6 +162,9 @@ func (m *memoryController) Stat(path string, stats *Metrics) error {
 			entry:  stats.Memory.KernelTCP,
 		},
 	} {
+		if _, ok := m.ignored[t.module]; ok {
+			continue
+		}
 		for _, tt := range []struct {
 			name  string
 			value *uint64
@@ -197,7 +229,7 @@ func writeEventFD(root string, cfd, efd uintptr) error {
 	return err
 }
 
-func (m *memoryController) parseStats(r io.Reader, stat *MemoryStat) error {
+func (m *memoryController) parseStats(r io.Reader, stat *v1.MemoryStat) error {
 	var (
 		raw  = make(map[string]uint64)
 		sc   = bufio.NewScanner(r)
@@ -282,7 +314,7 @@ func getMemorySettings(resources *specs.LinuxResources) []memorySettings {
 			value: mem.Limit,
 		},
 		{
-			name: "soft_limit_in_bytes",
+			name:  "soft_limit_in_bytes",
 			value: mem.Reservation,
 		},
 		{

vendor/github.com/containerd/cgroups/pids.go

@@ -23,6 +23,7 @@ import (
 	"strconv"
 	"strings"
 
+	v1 "github.com/containerd/cgroups/stats/v1"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
 )
 
@@ -62,7 +63,7 @@ func (p *pidsController) Update(path string, resources *specs.LinuxResources) er
 	return p.Create(path, resources)
 }
 
-func (p *pidsController) Stat(path string, stats *Metrics) error {
+func (p *pidsController) Stat(path string, stats *v1.Metrics) error {
 	current, err := readUint(filepath.Join(p.Path(path), "pids.current"))
 	if err != nil {
 		return err
@@ -77,7 +78,7 @@ func (p *pidsController) Stat(path string, stats *Metrics) error {
 			return err
 		}
 	}
-	stats.Pids = &PidsStat{
+	stats.Pids = &v1.PidsStat{
 		Current: current,
 		Limit:   max,
 	}

vendor/github.com/containerd/cgroups/rdma.go

@@ -24,6 +24,7 @@ import (
 	"strconv"
 	"strings"
 
+	v1 "github.com/containerd/cgroups/stats/v1"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
 )
 
@@ -80,7 +81,7 @@ func (p *rdmaController) Update(path string, resources *specs.LinuxResources) er
 	return p.Create(path, resources)
 }
 
-func parseRdmaKV(raw string, entry *RdmaEntry) {
+func parseRdmaKV(raw string, entry *v1.RdmaEntry) {
 	var value uint64
 	var err error
 
@@ -103,13 +104,13 @@ func parseRdmaKV(raw string, entry *RdmaEntry) {
 	}
 }
 
-func toRdmaEntry(strEntries []string) []*RdmaEntry {
-	var rdmaEntries []*RdmaEntry
+func toRdmaEntry(strEntries []string) []*v1.RdmaEntry {
+	var rdmaEntries []*v1.RdmaEntry
 	for i := range strEntries {
 		parts := strings.Fields(strEntries[i])
 		switch len(parts) {
 		case 3:
-			entry := new(RdmaEntry)
+			entry := new(v1.RdmaEntry)
 			entry.Device = parts[0]
 			parseRdmaKV(parts[1], entry)
 			parseRdmaKV(parts[2], entry)
@@ -122,7 +123,7 @@ func toRdmaEntry(strEntries []string) []*RdmaEntry {
 	return rdmaEntries
 }
 
-func (p *rdmaController) Stat(path string, stats *Metrics) error {
+func (p *rdmaController) Stat(path string, stats *v1.Metrics) error {
 
 	currentData, err := ioutil.ReadFile(filepath.Join(p.Path(path), "rdma.current"))
 	if err != nil {
@@ -145,7 +146,7 @@ func (p *rdmaController) Stat(path string, stats *Metrics) error {
 	currentEntries := toRdmaEntry(currentPerDevices)
 	maxEntries := toRdmaEntry(maxPerDevices)
 
-	stats.Rdma = &RdmaStat{
+	stats.Rdma = &v1.RdmaStat{
 		Current: currentEntries,
 		Limit:   maxEntries,
 	}

vendor/github.com/containerd/cgroups/stats/v1/doc.go

@@ -0,0 +1,17 @@
+/*
+   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 v1

vendor/github.com/containerd/cgroups/metrics.proto → vendor/github.com/containerd/cgroups/stats/v1/metrics.proto

@@ -12,6 +12,7 @@ message Metrics {
 	BlkIOStat blkio = 5;
 	RdmaStat rdma = 6;
 	repeated NetworkStat network = 7;
+	CgroupStats cgroup_stats = 8;
 }
 
 message HugetlbStat {
@@ -134,3 +135,17 @@ message NetworkStat {
 	uint64 tx_errors = 8;
 	uint64 tx_dropped = 9;
 }
+
+// CgroupStats exports per-cgroup statistics.
+message CgroupStats {
+	// number of tasks sleeping
+	uint64 nr_sleeping = 1;
+	// number of tasks running
+	uint64 nr_running = 2;
+	// number of tasks in stopped state
+	uint64 nr_stopped = 3;
+	// number of tasks in uninterruptible state
+	uint64 nr_uninterruptible = 4;
+	// number of tasks waiting on IO
+	uint64 nr_io_wait = 5;
+}

vendor/github.com/containerd/cgroups/subsystem.go

@@ -19,6 +19,7 @@ package cgroups
 import (
 	"fmt"
 
+	v1 "github.com/containerd/cgroups/stats/v1"
 	specs "github.com/opencontainers/runtime-spec/specs-go"
 )
 
@@ -85,7 +86,7 @@ type deleter interface {
 
 type stater interface {
 	Subsystem
-	Stat(path string, stats *Metrics) error
+	Stat(path string, stats *v1.Metrics) error
 }
 
 type updater interface {