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Update cadvisor version to latest version

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This commit is contained in:
Manjunath A Kumatagi 2017-04-04 13:20:20 -04:00
parent e36cca4b5d
commit 2b42d71a94
18 changed files with 594 additions and 106 deletions
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165
Godeps/Godeps.json generated
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@ -1225,203 +1225,208 @@
},
{
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},
{
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"Rev": "17543becf9053e7e80806a57b05002a88c79ec8a"
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},
{
"ImportPath": "github.com/google/cadvisor/info/v1",
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},
{
"ImportPath": "github.com/google/cadvisor/info/v2",
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},
{
"ImportPath": "github.com/google/cadvisor/machine",
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},
{
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},
{
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},
{
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},
{
"ImportPath": "github.com/google/cadvisor/pages",
"Comment": "v0.25.0",
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},
{
"ImportPath": "github.com/google/cadvisor/pages/static",
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},
{
"ImportPath": "github.com/google/cadvisor/storage",
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},
{
"ImportPath": "github.com/google/cadvisor/summary",
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},
{
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},
{
"ImportPath": "github.com/google/cadvisor/utils/cloudinfo",
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},
{
"ImportPath": "github.com/google/cadvisor/utils/cpuload",
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},
{
"ImportPath": "github.com/google/cadvisor/utils/docker",
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},
{
"ImportPath": "github.com/google/cadvisor/utils/oomparser",
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},
{
"ImportPath": "github.com/google/cadvisor/utils/sysfs",
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"Comment": "v0.25.0-14-g2ddeb5f",
"Rev": "2ddeb5f60e22d86c8d1eeb654dfb8bfadf93374c"
},
{
"ImportPath": "github.com/google/cadvisor/utils/sysinfo",
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"Rev": "2ddeb5f60e22d86c8d1eeb654dfb8bfadf93374c"
},
{
"ImportPath": "github.com/google/cadvisor/utils/tail",
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"Rev": "17543becf9053e7e80806a57b05002a88c79ec8a"
"Comment": "v0.25.0-14-g2ddeb5f",
"Rev": "2ddeb5f60e22d86c8d1eeb654dfb8bfadf93374c"
},
{
"ImportPath": "github.com/google/cadvisor/validate",
"Comment": "v0.25.0",
"Rev": "17543becf9053e7e80806a57b05002a88c79ec8a"
"Comment": "v0.25.0-14-g2ddeb5f",
"Rev": "2ddeb5f60e22d86c8d1eeb654dfb8bfadf93374c"
},
{
"ImportPath": "github.com/google/cadvisor/version",
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"Rev": "17543becf9053e7e80806a57b05002a88c79ec8a"
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"Rev": "2ddeb5f60e22d86c8d1eeb654dfb8bfadf93374c"
},
{
"ImportPath": "github.com/google/cadvisor/zfs",
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"Rev": "2ddeb5f60e22d86c8d1eeb654dfb8bfadf93374c"
},
{
"ImportPath": "github.com/google/certificate-transparency/go",

198
Godeps/LICENSES generated
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@ -47529,6 +47529,204 @@ OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
================================================================================
================================================================================
= vendor/github.com/google/cadvisor/zfs licensed under: =
Copyright 2014 The cAdvisor 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.
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
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END OF TERMS AND CONDITIONS
= vendor/github.com/google/cadvisor/LICENSE e7790b946bfacb700e8a8f2baedb3205 -
================================================================================
================================================================================
= vendor/github.com/google/certificate-transparency/go licensed under: =

3
vendor/BUILD vendored
View File

@ -2,6 +2,8 @@ package(default_visibility = ["//visibility:public"])
licenses(["notice"])
load("@io_bazel_rules_go//go:def.bzl")
filegroup(
name = "package-srcs",
srcs = glob(["**"]),
@ -213,6 +215,7 @@ filegroup(
"//vendor/github.com/google/cadvisor/utils:all-srcs",
"//vendor/github.com/google/cadvisor/validate:all-srcs",
"//vendor/github.com/google/cadvisor/version:all-srcs",
"//vendor/github.com/google/cadvisor/zfs:all-srcs",
"//vendor/github.com/google/certificate-transparency/go:all-srcs",
"//vendor/github.com/google/gofuzz:all-srcs",
"//vendor/github.com/gophercloud/gophercloud:all-srcs",

1
vendor/github.com/google/cadvisor/container/docker/BUILD generated vendored
View File

@ -31,6 +31,7 @@ go_library(
"//vendor/github.com/google/cadvisor/machine:go_default_library",
"//vendor/github.com/google/cadvisor/manager/watcher:go_default_library",
"//vendor/github.com/google/cadvisor/utils/docker:go_default_library",
"//vendor/github.com/google/cadvisor/zfs:go_default_library",
"//vendor/github.com/opencontainers/runc/libcontainer/cgroups:go_default_library",
"//vendor/github.com/opencontainers/runc/libcontainer/cgroups/fs:go_default_library",
"//vendor/github.com/opencontainers/runc/libcontainer/configs:go_default_library",

37
vendor/github.com/google/cadvisor/container/docker/docker.go generated vendored
View File

@ -17,6 +17,7 @@ package docker
import (
"fmt"
"regexp"
"strconv"
"strings"
@ -39,6 +40,7 @@ func Status() (v1.DockerStatus, error) {
out := v1.DockerStatus{}
out.Version = VersionString()
out.APIVersion = APIVersionString()
out.KernelVersion = machine.KernelVersion()
out.OS = dockerInfo.OperatingSystem
out.Hostname = dockerInfo.Name
@ -105,7 +107,7 @@ func ValidateInfo() (*dockertypes.Info, error) {
}
dockerInfo.ServerVersion = version.Version
}
version, err := parseDockerVersion(dockerInfo.ServerVersion)
version, err := parseVersion(dockerInfo.ServerVersion, version_re, 3)
if err != nil {
return nil, err
}
@ -129,7 +131,11 @@ func ValidateInfo() (*dockertypes.Info, error) {
}
func Version() ([]int, error) {
return parseDockerVersion(VersionString())
return parseVersion(VersionString(), version_re, 3)
}
func APIVersion() ([]int, error) {
return parseVersion(APIVersionString(), apiversion_re, 2)
}
func VersionString() string {
@ -144,18 +150,29 @@ func VersionString() string {
return docker_version
}
// TODO: switch to a semantic versioning library.
func parseDockerVersion(full_version_string string) ([]int, error) {
matches := version_re.FindAllStringSubmatch(full_version_string, -1)
func APIVersionString() string {
docker_api_version := "Unknown"
client, err := Client()
if err == nil {
version, err := client.ServerVersion(context.Background())
if err == nil {
docker_api_version = version.APIVersion
}
}
return docker_api_version
}
func parseVersion(version_string string, regex *regexp.Regexp, length int) ([]int, error) {
matches := regex.FindAllStringSubmatch(version_string, -1)
if len(matches) != 1 {
return nil, fmt.Errorf("version string \"%v\" doesn't match expected regular expression: \"%v\"", full_version_string, version_regexp_string)
return nil, fmt.Errorf("version string \"%v\" doesn't match expected regular expression: \"%v\"", version_string, regex.String())
}
version_string_array := matches[0][1:]
version_array := make([]int, 3)
for index, version_string := range version_string_array {
version, err := strconv.Atoi(version_string)
version_array := make([]int, length)
for index, version_str := range version_string_array {
version, err := strconv.Atoi(version_str)
if err != nil {
return nil, fmt.Errorf("error while parsing \"%v\" in \"%v\"", version_string, full_version_string)
return nil, fmt.Errorf("error while parsing \"%v\" in \"%v\"", version_str, version_string)
}
version_array[index] = version
}

41
vendor/github.com/google/cadvisor/container/docker/factory.go generated vendored
View File

@ -33,6 +33,7 @@ import (
"github.com/google/cadvisor/machine"
"github.com/google/cadvisor/manager/watcher"
dockerutil "github.com/google/cadvisor/utils/docker"
"github.com/google/cadvisor/zfs"
docker "github.com/docker/engine-api/client"
"github.com/golang/glog"
@ -102,9 +103,13 @@ type dockerFactory struct {
dockerVersion []int
dockerAPIVersion []int
ignoreMetrics container.MetricSet
thinPoolWatcher *devicemapper.ThinPoolWatcher
zfsWatcher *zfs.ZfsWatcher
}
func (self *dockerFactory) String() string {
@ -132,6 +137,7 @@ func (self *dockerFactory) NewContainerHandler(name string, inHostNamespace bool
self.dockerVersion,
self.ignoreMetrics,
self.thinPoolWatcher,
self.zfsWatcher,
)
return
}
@ -181,8 +187,10 @@ func (self *dockerFactory) DebugInfo() map[string][]string {
}
var (
version_regexp_string = `(\d+)\.(\d+)\.(\d+)`
version_re = regexp.MustCompile(version_regexp_string)
version_regexp_string = `(\d+)\.(\d+)\.(\d+)`
version_re = regexp.MustCompile(version_regexp_string)
apiversion_regexp_string = `(\d+)\.(\d+)`
apiversion_re = regexp.MustCompile(apiversion_regexp_string)
)
func startThinPoolWatcher(dockerInfo *dockertypes.Info) (*devicemapper.ThinPoolWatcher, error) {
@ -218,6 +226,21 @@ func startThinPoolWatcher(dockerInfo *dockertypes.Info) (*devicemapper.ThinPoolW
return thinPoolWatcher, nil
}
func startZfsWatcher(dockerInfo *dockertypes.Info) (*zfs.ZfsWatcher, error) {
filesystem, err := dockerutil.DockerZfsFilesystem(*dockerInfo)
if err != nil {
return nil, err
}
zfsWatcher, err := zfs.NewZfsWatcher(filesystem)
if err != nil {
return nil, err
}
go zfsWatcher.Start()
return zfsWatcher, nil
}
func ensureThinLsKernelVersion(kernelVersion string) error {
// kernel 4.4.0 has the proper bug fixes to allow thin_ls to work without corrupting the thin pool
minKernelVersion := semver.MustParse("4.4.0")
@ -291,7 +314,9 @@ func Register(factory info.MachineInfoFactory, fsInfo fs.FsInfo, ignoreMetrics c
}
// Version already validated above, assume no error here.
dockerVersion, _ := parseDockerVersion(dockerInfo.ServerVersion)
dockerVersion, _ := parseVersion(dockerInfo.ServerVersion, version_re, 3)
dockerAPIVersion, _ := APIVersion()
cgroupSubsystems, err := libcontainer.GetCgroupSubsystems()
if err != nil {
@ -306,17 +331,27 @@ func Register(factory info.MachineInfoFactory, fsInfo fs.FsInfo, ignoreMetrics c
}
}
var zfsWatcher *zfs.ZfsWatcher
if storageDriver(dockerInfo.Driver) == zfsStorageDriver {
zfsWatcher, err = startZfsWatcher(dockerInfo)
if err != nil {
glog.Errorf("zfs filesystem stats will not be reported: %v", err)
}
}
glog.Infof("Registering Docker factory")
f := &dockerFactory{
cgroupSubsystems: cgroupSubsystems,
client: client,
dockerVersion: dockerVersion,
dockerAPIVersion: dockerAPIVersion,
fsInfo: fsInfo,
machineInfoFactory: factory,
storageDriver: storageDriver(dockerInfo.Driver),
storageDir: RootDir(),
ignoreMetrics: ignoreMetrics,
thinPoolWatcher: thinPoolWatcher,
zfsWatcher: zfsWatcher,
}
container.RegisterContainerHandlerFactory(f, []watcher.ContainerWatchSource{watcher.Raw})

46
vendor/github.com/google/cadvisor/container/docker/handler.go generated vendored
View File

@ -29,6 +29,7 @@ import (
"github.com/google/cadvisor/fs"
info "github.com/google/cadvisor/info/v1"
dockerutil "github.com/google/cadvisor/utils/docker"
"github.com/google/cadvisor/zfs"
docker "github.com/docker/engine-api/client"
dockercontainer "github.com/docker/engine-api/types/container"
@ -42,6 +43,7 @@ import (
const (
// The read write layers exist here.
aufsRWLayer = "diff"
// Path to the directory where docker stores log files if the json logging driver is enabled.
pathToContainersDir = "containers"
)
@ -72,6 +74,12 @@ type dockerContainerHandler struct {
// the devicemapper device id for the container
deviceID string
// zfs Filesystem
zfsFilesystem string
// zfsParent is the parent for docker zfs
zfsParent string
// Time at which this container was created.
creationTime time.Time
@ -101,6 +109,9 @@ type dockerContainerHandler struct {
// thin pool watcher
thinPoolWatcher *devicemapper.ThinPoolWatcher
// zfs watcher
zfsWatcher *zfs.ZfsWatcher
}
var _ container.ContainerHandler = &dockerContainerHandler{}
@ -136,6 +147,7 @@ func newDockerContainerHandler(
dockerVersion []int,
ignoreMetrics container.MetricSet,
thinPoolWatcher *devicemapper.ThinPoolWatcher,
zfsWatcher *zfs.ZfsWatcher,
) (container.ContainerHandler, error) {
// Create the cgroup paths.
cgroupPaths := make(map[string]string, len(cgroupSubsystems.MountPoints))
@ -172,12 +184,21 @@ func newDockerContainerHandler(
var (
rootfsStorageDir string
poolName string
zfsFilesystem string
zfsParent string
)
switch storageDriver {
case aufsStorageDriver:
rootfsStorageDir = path.Join(storageDir, string(aufsStorageDriver), aufsRWLayer, rwLayerID)
case overlayStorageDriver:
rootfsStorageDir = path.Join(storageDir, string(overlayStorageDriver), rwLayerID)
case zfsStorageDriver:
status, err := Status()
if err != nil {
return nil, fmt.Errorf("unable to determine docker status: %v", err)
}
zfsParent = status.DriverStatus[dockerutil.DriverStatusParentDataset]
zfsFilesystem = path.Join(zfsParent, rwLayerID)
case devicemapperStorageDriver:
status, err := Status()
if err != nil {
@ -199,10 +220,13 @@ func newDockerContainerHandler(
fsInfo: fsInfo,
rootFs: rootFs,
poolName: poolName,
zfsFilesystem: zfsFilesystem,
rootfsStorageDir: rootfsStorageDir,
envs: make(map[string]string),
ignoreMetrics: ignoreMetrics,
thinPoolWatcher: thinPoolWatcher,
zfsWatcher: zfsWatcher,
zfsParent: zfsParent,
}
// We assume that if Inspect fails then the container is not known to docker.
@ -245,7 +269,9 @@ func newDockerContainerHandler(
handler.fsHandler = &dockerFsHandler{
fsHandler: common.NewFsHandler(common.DefaultPeriod, rootfsStorageDir, otherStorageDir, fsInfo),
thinPoolWatcher: thinPoolWatcher,
zfsWatcher: zfsWatcher,
deviceID: handler.deviceID,
zfsFilesystem: zfsFilesystem,
}
}
@ -265,7 +291,7 @@ func newDockerContainerHandler(
}
// dockerFsHandler is a composite FsHandler implementation the incorporates
// the common fs handler and a devicemapper ThinPoolWatcher.
// the common fs handler, a devicemapper ThinPoolWatcher, and a zfsWatcher
type dockerFsHandler struct {
fsHandler common.FsHandler
@ -273,6 +299,11 @@ type dockerFsHandler struct {
thinPoolWatcher *devicemapper.ThinPoolWatcher
// deviceID is the id of the container's fs device
deviceID string
// zfsWatcher is the zfs filesystem watcher
zfsWatcher *zfs.ZfsWatcher
// zfsFilesystem is the docker zfs filesystem
zfsFilesystem string
}
var _ common.FsHandler = &dockerFsHandler{}
@ -306,6 +337,15 @@ func (h *dockerFsHandler) Usage() common.FsUsage {
}
}
if h.zfsWatcher != nil {
zfsUsage, err := h.zfsWatcher.GetUsage(h.zfsFilesystem)
if err != nil {
glog.V(5).Infof("unable to get fs usage from zfs for filesystem %s: %v", h.zfsFilesystem, err)
} else {
usage.BaseUsageBytes = zfsUsage
usage.TotalUsageBytes += zfsUsage
}
}
return usage
}
@ -359,12 +399,14 @@ func (self *dockerContainerHandler) getFsStats(stats *info.ContainerStats) error
// Device has to be the pool name to correlate with the device name as
// set in the machine info filesystems.
device = self.poolName
case aufsStorageDriver, overlayStorageDriver, zfsStorageDriver:
case aufsStorageDriver, overlayStorageDriver:
deviceInfo, err := self.fsInfo.GetDirFsDevice(self.rootfsStorageDir)
if err != nil {
return fmt.Errorf("unable to determine device info for dir: %v: %v", self.rootfsStorageDir, err)
}
device = deviceInfo.Device
case zfsStorageDriver:
device = self.zfsParent
default:
return nil
}

25
vendor/github.com/google/cadvisor/fs/fs.go generated vendored
View File

@ -149,6 +149,31 @@ func processMounts(mounts []*mount.Info, excludedMountpointPrefixes []string) ma
continue
}
// btrfs fix: following workaround fixes wrong btrfs Major and Minor Ids reported in /proc/self/mountinfo.
// instead of using values from /proc/self/mountinfo we use stat to get Ids from btrfs mount point
if mount.Fstype == "btrfs" && mount.Major == 0 && strings.HasPrefix(mount.Source, "/dev/") {
buf := new(syscall.Stat_t)
err := syscall.Stat(mount.Source, buf)
if err != nil {
glog.Warningf("stat failed on %s with error: %s", mount.Source, err)
} else {
glog.Infof("btrfs mount %#v", mount)
if buf.Mode&syscall.S_IFMT == syscall.S_IFBLK {
err := syscall.Stat(mount.Mountpoint, buf)
if err != nil {
glog.Warningf("stat failed on %s with error: %s", mount.Mountpoint, err)
} else {
glog.Infof("btrfs dev major:minor %d:%d\n", int(major(buf.Dev)), int(minor(buf.Dev)))
glog.Infof("btrfs rdev major:minor %d:%d\n", int(major(buf.Rdev)), int(minor(buf.Rdev)))
mount.Major = int(major(buf.Dev))
mount.Minor = int(minor(buf.Dev))
}
}
}
}
partitions[mount.Source] = partition{
fsType: mount.Fstype,
mountpoint: mount.Mountpoint,

1
vendor/github.com/google/cadvisor/info/v1/docker.go generated vendored
View File

@ -17,6 +17,7 @@ package v1
type DockerStatus struct {
Version string `json:"version"`
APIVersion string `json:"api_version"`
KernelVersion string `json:"kernel_version"`
OS string `json:"os"`
Hostname string `json:"hostname"`

3
vendor/github.com/google/cadvisor/info/v1/machine.go generated vendored
View File

@ -196,6 +196,9 @@ type VersionInfo struct {
// Docker version.
DockerVersion string `json:"docker_version"`
// Docker API Version
DockerAPIVersion string `json:"docker_api_version"`
// cAdvisor version.
CadvisorVersion string `json:"cadvisor_version"`
// cAdvisor git revision.

4
vendor/github.com/google/cadvisor/info/v2/machine.go generated vendored
View File

@ -31,6 +31,9 @@ type Attributes struct {
// Docker version.
DockerVersion string `json:"docker_version"`
// Docker API version.
DockerAPIVersion string `json:"docker_api_version"`
// cAdvisor version.
CadvisorVersion string `json:"cadvisor_version"`
@ -74,6 +77,7 @@ func GetAttributes(mi *v1.MachineInfo, vi *v1.VersionInfo) Attributes {
KernelVersion: vi.KernelVersion,
ContainerOsVersion: vi.ContainerOsVersion,
DockerVersion: vi.DockerVersion,
DockerAPIVersion: vi.DockerAPIVersion,
CadvisorVersion: vi.CadvisorVersion,
NumCores: mi.NumCores,
CpuFrequency: mi.CpuFrequency,

2
vendor/github.com/google/cadvisor/manager/manager.go generated vendored
View File

@ -1255,11 +1255,13 @@ func getVersionInfo() (*info.VersionInfo, error) {
kernel_version := machine.KernelVersion()
container_os := machine.ContainerOsVersion()
docker_version := docker.VersionString()
docker_api_version := docker.APIVersionString()
return &info.VersionInfo{
KernelVersion: kernel_version,
ContainerOsVersion: container_os,
DockerVersion: docker_version,
DockerAPIVersion: docker_api_version,
CadvisorVersion: version.Info["version"],
CadvisorRevision: version.Info["revision"],
}, nil

1
vendor/github.com/google/cadvisor/pages/docker.go generated vendored
View File

@ -40,6 +40,7 @@ func toStatusKV(status info.DockerStatus) ([]keyVal, []keyVal) {
}
return []keyVal{
{Key: "Docker Version", Value: status.Version},
{Key: "Docker API Version", Value: status.APIVersion},
{Key: "Kernel Version", Value: status.KernelVersion},
{Key: "OS Version", Value: status.OS},
{Key: "Host Name", Value: status.Hostname},

20
vendor/github.com/google/cadvisor/utils/docker/docker.go generated vendored
View File

@ -23,11 +23,12 @@ import (
)
const (
DockerInfoDriver = "Driver"
DockerInfoDriverStatus = "DriverStatus"
DriverStatusPoolName = "Pool Name"
DriverStatusDataLoopFile = "Data loop file"
DriverStatusMetadataFile = "Metadata file"
DockerInfoDriver = "Driver"
DockerInfoDriverStatus = "DriverStatus"
DriverStatusPoolName = "Pool Name"
DriverStatusDataLoopFile = "Data loop file"
DriverStatusMetadataFile = "Metadata file"
DriverStatusParentDataset = "Parent Dataset"
)
func DriverStatusValue(status [][2]string, target string) string {
@ -68,3 +69,12 @@ func DockerMetadataDevice(info dockertypes.Info) (string, error) {
return metadataDevice, nil
}
func DockerZfsFilesystem(info dockertypes.Info) (string, error) {
filesystem := DriverStatusValue(info.DriverStatus, DriverStatusParentDataset)
if len(filesystem) == 0 {
return "", fmt.Errorf("Could not get zfs filesystem")
}
return filesystem, nil
}

4
vendor/github.com/google/cadvisor/utils/sysfs/sysfs.go generated vendored
View File

@ -70,8 +70,8 @@ type SysFs interface {
type realSysFs struct{}
func NewRealSysFs() (SysFs, error) {
return &realSysFs{}, nil
func NewRealSysFs() SysFs {
return &realSysFs{}
}
func (self *realSysFs) GetBlockDevices() ([]os.FileInfo, error) {

5
vendor/github.com/google/cadvisor/utils/sysinfo/sysinfo.go generated vendored
View File

@ -155,10 +155,7 @@ func GetCacheInfo(sysFs sysfs.SysFs, id int) ([]sysfs.CacheInfo, error) {
func GetNetworkStats(name string) (info.InterfaceStats, error) {
// TODO(rjnagal): Take syfs as an argument.
sysFs, err := sysfs.NewRealSysFs()
if err != nil {
return info.InterfaceStats{}, err
}
sysFs := sysfs.NewRealSysFs()
return getNetworkStats(name, sysFs)
}

31
vendor/github.com/google/cadvisor/zfs/BUILD generated vendored Normal file
View File

@ -0,0 +1,31 @@
package(default_visibility = ["//visibility:public"])
licenses(["notice"])
load(
"@io_bazel_rules_go//go:def.bzl",
"go_library",
)
go_library(
name = "go_default_library",
srcs = ["watcher.go"],
tags = ["automanaged"],
deps = [
"//vendor/github.com/golang/glog:go_default_library",
"//vendor/github.com/mistifyio/go-zfs:go_default_library",
],
)
filegroup(
name = "package-srcs",
srcs = glob(["**"]),
tags = ["automanaged"],
visibility = ["//visibility:private"],
)
filegroup(
name = "all-srcs",
srcs = [":package-srcs"],
tags = ["automanaged"],
)

113
vendor/github.com/google/cadvisor/zfs/watcher.go generated vendored Normal file
View File

@ -0,0 +1,113 @@
// Copyright 2016 Google Inc. All Rights Reserved.
//
// 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 zfs
import (
"fmt"
"sync"
"time"
"github.com/golang/glog"
zfs "github.com/mistifyio/go-zfs"
)
// zfsWatcher maintains a cache of filesystem -> usage stats for a
// zfs filesystem
type ZfsWatcher struct {
filesystem string
lock *sync.RWMutex
cache map[string]uint64
period time.Duration
stopChan chan struct{}
}
// NewThinPoolWatcher returns a new ThinPoolWatcher for the given devicemapper
// thin pool name and metadata device or an error.
func NewZfsWatcher(filesystem string) (*ZfsWatcher, error) {
return &ZfsWatcher{
filesystem: filesystem,
lock: &sync.RWMutex{},
cache: make(map[string]uint64),
period: 15 * time.Second,
stopChan: make(chan struct{}),
}, nil
}
// Start starts the ZfsWatcher.
func (w *ZfsWatcher) Start() {
err := w.Refresh()
if err != nil {
glog.Errorf("encountered error refreshing zfs watcher: %v", err)
}
for {
select {
case <-w.stopChan:
return
case <-time.After(w.period):
start := time.Now()
err = w.Refresh()
if err != nil {
glog.Errorf("encountered error refreshing zfs watcher: %v", err)
}
// print latency for refresh
duration := time.Since(start)
glog.V(5).Infof("zfs(%d) took %s", start.Unix(), duration)
}
}
}
// Stop stops the ZfsWatcher.
func (w *ZfsWatcher) Stop() {
close(w.stopChan)
}
// GetUsage gets the cached usage value of the given filesystem.
func (w *ZfsWatcher) GetUsage(filesystem string) (uint64, error) {
w.lock.RLock()
defer w.lock.RUnlock()
v, ok := w.cache[filesystem]
if !ok {
return 0, fmt.Errorf("no cached value for usage of filesystem %v", filesystem)
}
return v, nil
}
// Refresh performs a zfs get
func (w *ZfsWatcher) Refresh() error {
w.lock.Lock()
defer w.lock.Unlock()
newCache := make(map[string]uint64)
parent, err := zfs.GetDataset(w.filesystem)
if err != nil {
glog.Errorf("encountered error getting zfs filesystem: %s: %v", w.filesystem, err)
return err
}
children, err := parent.Children(0)
if err != nil {
glog.Errorf("encountered error getting children of zfs filesystem: %s: %v", w.filesystem, err)
return err
}
for _, ds := range children {
newCache[ds.Name] = ds.Used
}
w.cache = newCache
return nil
}