update cadvisor, docker, and runc godeps

vendor/github.com/google/cadvisor/container/libcontainer/BUILD

@@ -3,6 +3,7 @@ load("@io_bazel_rules_go//go:def.bzl", "go_library")
 go_library(
     name = "go_default_library",
     srcs = ["helpers.go"],
+    cgo = True,
     visibility = ["//visibility:public"],
     deps = [
         "//vendor/github.com/golang/glog:go_default_library",

vendor/github.com/google/cadvisor/container/libcontainer/helpers.go

@@ -33,6 +33,11 @@ import (
 	"github.com/opencontainers/runc/libcontainer/cgroups"
 )
 
+/*
+#include <unistd.h>
+*/
+import "C"
+
 type CgroupSubsystems struct {
 	// Cgroup subsystem mounts.
 	// e.g.: "/sys/fs/cgroup/cpu" -> ["cpu", "cpuacct"]
@@ -99,7 +104,7 @@ func GetStats(cgroupManager cgroups.Manager, rootFs string, pid int, ignoreMetri
 	if !ignoreMetrics.Has(container.NetworkUsageMetrics) {
 		netStats, err := networkStatsFromProc(rootFs, pid)
 		if err != nil {
-			glog.V(2).Infof("Unable to get network stats from pid %d: %v", pid, err)
+			glog.V(4).Infof("Unable to get network stats from pid %d: %v", pid, err)
 		} else {
 			stats.Network.Interfaces = append(stats.Network.Interfaces, netStats...)
 		}
@@ -107,14 +112,14 @@ func GetStats(cgroupManager cgroups.Manager, rootFs string, pid int, ignoreMetri
 	if !ignoreMetrics.Has(container.NetworkTcpUsageMetrics) {
 		t, err := tcpStatsFromProc(rootFs, pid, "net/tcp")
 		if err != nil {
-			glog.V(2).Infof("Unable to get tcp stats from pid %d: %v", pid, err)
+			glog.V(4).Infof("Unable to get tcp stats from pid %d: %v", pid, err)
 		} else {
 			stats.Network.Tcp = t
 		}
 
 		t6, err := tcpStatsFromProc(rootFs, pid, "net/tcp6")
 		if err != nil {
-			glog.V(2).Infof("Unable to get tcp6 stats from pid %d: %v", pid, err)
+			glog.V(4).Infof("Unable to get tcp6 stats from pid %d: %v", pid, err)
 		} else {
 			stats.Network.Tcp6 = t6
 		}
@@ -122,14 +127,14 @@ func GetStats(cgroupManager cgroups.Manager, rootFs string, pid int, ignoreMetri
 	if !ignoreMetrics.Has(container.NetworkUdpUsageMetrics) {
 		u, err := udpStatsFromProc(rootFs, pid, "net/udp")
 		if err != nil {
-			glog.V(2).Infof("Unable to get udp stats from pid %d: %v", pid, err)
+			glog.V(4).Infof("Unable to get udp stats from pid %d: %v", pid, err)
 		} else {
 			stats.Network.Udp = u
 		}
 
 		u6, err := udpStatsFromProc(rootFs, pid, "net/udp6")
 		if err != nil {
-			glog.V(2).Infof("Unable to get udp6 stats from pid %d: %v", pid, err)
+			glog.V(4).Infof("Unable to get udp6 stats from pid %d: %v", pid, err)
 		} else {
 			stats.Network.Udp6 = u6
 		}
@@ -433,15 +438,40 @@ func DiskStatsCopy(blkio_stats []cgroups.BlkioStatEntry) (stat []info.PerDiskSta
 	return DiskStatsCopy1(disk_stat)
 }
 
+func minUint32(x, y uint32) uint32 {
+	if x < y {
+		return x
+	}
+	return y
+}
+
+// var to allow unit tests to stub it out
+var numCpusFunc = getNumberOnlineCPUs
+
 // Convert libcontainer stats to info.ContainerStats.
 func setCpuStats(s *cgroups.Stats, ret *info.ContainerStats) {
 	ret.Cpu.Usage.User = s.CpuStats.CpuUsage.UsageInUsermode
 	ret.Cpu.Usage.System = s.CpuStats.CpuUsage.UsageInKernelmode
-	n := len(s.CpuStats.CpuUsage.PercpuUsage)
-	ret.Cpu.Usage.PerCpu = make([]uint64, n)
+	numPossible := uint32(len(s.CpuStats.CpuUsage.PercpuUsage))
+	// Note that as of https://patchwork.kernel.org/patch/8607101/ (kernel v4.7),
+	// the percpu usage information includes extra zero values for all additional
+	// possible CPUs. This is to allow statistic collection after CPU-hotplug.
+	// We intentionally ignore these extra zeroes.
+	numActual, err := numCpusFunc()
+	if err != nil {
+		glog.Errorf("unable to determine number of actual cpus; defaulting to maximum possible number: errno %v", err)
+		numActual = numPossible
+	}
+	if numActual > numPossible {
+		// The real number of cores should never be greater than the number of
+		// datapoints reported in cpu usage.
+		glog.Errorf("PercpuUsage had %v cpus, but the actual number is %v; ignoring extra CPUs", numPossible, numActual)
+	}
+	numActual = minUint32(numPossible, numActual)
+	ret.Cpu.Usage.PerCpu = make([]uint64, numActual)
 
 	ret.Cpu.Usage.Total = 0
-	for i := 0; i < n; i++ {
+	for i := uint32(0); i < numActual; i++ {
 		ret.Cpu.Usage.PerCpu[i] = s.CpuStats.CpuUsage.PercpuUsage[i]
 		ret.Cpu.Usage.Total += s.CpuStats.CpuUsage.PercpuUsage[i]
 	}
@@ -451,6 +481,21 @@ func setCpuStats(s *cgroups.Stats, ret *info.ContainerStats) {
 	ret.Cpu.CFS.ThrottledTime = s.CpuStats.ThrottlingData.ThrottledTime
 }
 
+// Copied from
+// https://github.com/moby/moby/blob/8b1adf55c2af329a4334f21d9444d6a169000c81/daemon/stats/collector_unix.go#L73
+// Apache 2.0, Copyright Docker, Inc.
+func getNumberOnlineCPUs() (uint32, error) {
+	i, err := C.sysconf(C._SC_NPROCESSORS_ONLN)
+	// According to POSIX - errno is undefined after successful
+	// sysconf, and can be non-zero in several cases, so look for
+	// error in returned value not in errno.
+	// (https://sourceware.org/bugzilla/show_bug.cgi?id=21536)
+	if i == -1 {
+		return 0, err
+	}
+	return uint32(i), nil
+}
+
 func setDiskIoStats(s *cgroups.Stats, ret *info.ContainerStats) {
 	ret.DiskIo.IoServiceBytes = DiskStatsCopy(s.BlkioStats.IoServiceBytesRecursive)
 	ret.DiskIo.IoServiced = DiskStatsCopy(s.BlkioStats.IoServicedRecursive)
@@ -466,8 +511,14 @@ func setMemoryStats(s *cgroups.Stats, ret *info.ContainerStats) {
 	ret.Memory.Usage = s.MemoryStats.Usage.Usage
 	ret.Memory.Failcnt = s.MemoryStats.Usage.Failcnt
 	ret.Memory.Cache = s.MemoryStats.Stats["cache"]
-	ret.Memory.RSS = s.MemoryStats.Stats["rss"]
-	ret.Memory.Swap = s.MemoryStats.Stats["swap"]
+
+	if s.MemoryStats.UseHierarchy {
+		ret.Memory.RSS = s.MemoryStats.Stats["total_rss"]
+		ret.Memory.Swap = s.MemoryStats.Stats["total_swap"]
+	} else {
+		ret.Memory.RSS = s.MemoryStats.Stats["rss"]
+		ret.Memory.Swap = s.MemoryStats.Stats["swap"]
+	}
 	if v, ok := s.MemoryStats.Stats["pgfault"]; ok {
 		ret.Memory.ContainerData.Pgfault = v
 		ret.Memory.HierarchicalData.Pgfault = v