func streamResults(eventChannel *events.EventChannel, w http.ResponseWriter, r *http.Request, m manager.Manager) error {
cn, ok := w.(http.CloseNotifier)
if !ok {
return errors.New("could not access http.CloseNotifier")
}
flusher, ok := w.(http.Flusher)
if !ok {
return errors.New("could not access http.Flusher")
}
w.Header().Set("Transfer-Encoding", "chunked")
w.WriteHeader(http.StatusOK)
flusher.Flush()
enc := json.NewEncoder(w)
for {
select {
case <-cn.CloseNotify():
m.CloseEventChannel(eventChannel.GetWatchId())
return nil
case ev := <-eventChannel.GetChannel():
err := enc.Encode(ev)
if err != nil {
glog.Errorf("error encoding message %+v for result stream: %v", ev, err)
}
flusher.Flush()
}
}
}
func (self *version1_3) HandleRequest(requestType string, request []string, m manager.Manager, w http.ResponseWriter, r *http.Request) error {
switch requestType {
case eventsApi:
query, eventsFromAllTime, err := getEventRequest(r)
if err != nil {
return err
}
glog.V(2).Infof("Api - Events(%v)", query)
if eventsFromAllTime {
pastEvents, err := m.GetPastEvents(query)
if err != nil {
return err
}
return writeResult(pastEvents, w)
}
eventsChannel := make(chan *events.Event, 10)
err = m.WatchForEvents(query, eventsChannel)
if err != nil {
return err
}
return streamResults(eventsChannel, w, r)
default:
return self.baseVersion.HandleRequest(requestType, request, m, w, r)
}
}
func HandleRequest(w http.ResponseWriter, containerManager manager.Manager) error {
// Get cAdvisor version Info.
versionInfo, err := containerManager.GetVersionInfo()
if err != nil {
return err
}
out := fmt.Sprintf("cAdvisor version: %s\n\n", versionInfo.CadvisorVersion)
// No OS is preferred or unsupported as of now.
out += fmt.Sprintf("OS version: %s\n\n", versionInfo.ContainerOsVersion)
kernelValidation, desc := validateKernelVersion(versionInfo.KernelVersion)
out += fmt.Sprintf(OutputFormat, "Kernel version", kernelValidation, desc)
cgroupValidation, desc := validateCgroups()
out += fmt.Sprintf(OutputFormat, "Cgroup setup", cgroupValidation, desc)
mountsValidation, desc := validateCgroupMounts()
out += fmt.Sprintf(OutputFormat, "Cgroup mount setup", mountsValidation, desc)
dockerValidation, desc := validateDockerVersion(versionInfo.DockerVersion)
out += fmt.Sprintf(OutputFormat, "Docker version", dockerValidation, desc)
dockerInfoValidation, desc := validateDockerInfo()
out += fmt.Sprintf(OutputFormat, "Docker driver setup", dockerInfoValidation, desc)
ioSchedulerValidation, desc := validateIoScheduler(containerManager)
out += fmt.Sprintf(OutputFormat, "Block device setup", ioSchedulerValidation, desc)
_, err = w.Write([]byte(out))
return err
}
func (self *version1_1) HandleRequest(requestType string, request []string, m manager.Manager, w http.ResponseWriter, r *http.Request) error {
switch requestType {
case subcontainersApi:
containerName := getContainerName(request)
glog.V(4).Infof("Api - Subcontainers(%s)", containerName)
// Get the query request.
query, err := getContainerInfoRequest(r.Body)
if err != nil {
return err
}
// Get the subcontainers.
containers, err := m.SubcontainersInfo(containerName, query)
if err != nil {
return fmt.Errorf("failed to get subcontainers for container %q with error: %s", containerName, err)
}
// Only output the containers as JSON.
err = writeResult(containers, w)
if err != nil {
return err
}
return nil
default:
return self.baseVersion.HandleRequest(requestType, request, m, w, r)
}
}
func (self *version2_1) HandleRequest(requestType string, request []string, m manager.Manager, w http.ResponseWriter, r *http.Request) error {
// Get the query request.
opt, err := getRequestOptions(r)
if err != nil {
return err
}
switch requestType {
case machineStatsApi:
glog.V(4).Infof("Api - MachineStats(%v)", request)
cont, err := m.GetRequestedContainersInfo("/", opt)
if err != nil {
return err
}
return writeResult(v2.MachineStatsFromV1(cont["/"]), w)
case statsApi:
name := getContainerName(request)
glog.V(4).Infof("Api - Stats: Looking for stats for container %q, options %+v", name, opt)
conts, err := m.GetRequestedContainersInfo(name, opt)
if err != nil {
return err
}
contStats := make(map[string][]*v2.ContainerStats, len(conts))
for name, cont := range conts {
contStats[name] = v2.ContainerStatsFromV1(&cont.Spec, cont.Stats)
}
return writeResult(contStats, w)
default:
return self.baseVersion.HandleRequest(requestType, request, m, w, r)
}
}
func (self *version2_0) HandleRequest(requestType string, request []string, m manager.Manager, w http.ResponseWriter, r *http.Request) error {
switch requestType {
case summaryApi:
containerName := getContainerName(request)
glog.V(2).Infof("Api - Summary(%v)", containerName)
stats, err := m.GetContainerDerivedStats(containerName)
if err != nil {
return err
}
return writeResult(stats, w)
case statsApi:
name := getContainerName(request)
sr, err := getStatsRequest(name, r)
if err != nil {
return err
}
glog.V(2).Infof("Api - Stats: Looking for stats for container %q, options %+v", name, sr)
query := info.ContainerInfoRequest{
NumStats: sr.Count,
}
cont, err := m.GetContainerInfo(name, &query)
if err != nil {
return fmt.Errorf("failed to get container %q: %v", name, err)
}
contStats := convertStats(cont)
return writeResult(contStats, w)
case specApi:
containerName := getContainerName(request)
glog.V(2).Infof("Api - Spec(%v)", containerName)
spec, err := m.GetContainerSpec(containerName)
if err != nil {
return err
}
specV2 := convertSpec(spec)
return writeResult(specV2, w)
case storageApi:
var err error
fi := []v2.FsInfo{}
label := r.URL.Query().Get("label")
if len(label) == 0 {
// Get all global filesystems info.
fi, err = m.GetFsInfo("")
if err != nil {
return err
}
} else {
// Get a specific label.
fi, err = m.GetFsInfo(label)
if err != nil {
return err
}
}
return writeResult(fi, w)
default:
return self.baseVersion.HandleRequest(requestType, request, m, w, r)
}
}
func HandleRequest(m manager.Manager, w http.ResponseWriter, u *url.URL) error {
start := time.Now()
// Get API request type.
requestType := u.Path[len(ApiResource):]
i := strings.Index(requestType, "/")
requestArgs := ""
if i != -1 {
requestArgs = requestType[i:]
requestType = requestType[:i]
}
if requestType == MachineApi {
log.Printf("Api - Machine")
// Get the MachineInfo
machineInfo, err := m.GetMachineInfo()
if err != nil {
return err
}
out, err := json.Marshal(machineInfo)
if err != nil {
fmt.Fprintf(w, "Failed to marshall MachineInfo with error: %s", err)
}
w.Write(out)
} else if requestType == ContainersApi {
// The container name is the path after the requestType
containerName := requestArgs
log.Printf("Api - Container(%s)", containerName)
// Get the container.
cont, err := m.GetContainerInfo(containerName)
if err != nil {
fmt.Fprintf(w, "Failed to get container \"%s\" with error: %s", containerName, err)
return err
}
// Only output the container as JSON.
out, err := json.Marshal(cont)
if err != nil {
fmt.Fprintf(w, "Failed to marshall container %q with error: %s", containerName, err)
}
w.Write(out)
} else {
return fmt.Errorf("unknown API request type %q", requestType)
}
log.Printf("Request took %s", time.Since(start))
return nil
}
func installSignalHandler(containerManager manager.Manager) {
c := make(chan os.Signal, 1)
signal.Notify(c, os.Interrupt, os.Kill, syscall.SIGTERM)
// Block until a signal is received.
go func() {
sig := <-c
if err := containerManager.Stop(); err != nil {
glog.Errorf("Failed to stop container manager: %v", err)
}
glog.Infof("Exiting given signal: %v", sig)
os.Exit(0)
}()
}
func (self *version1_3) HandleRequest(requestType string, request []string, m manager.Manager, w http.ResponseWriter, r *http.Request) error {
switch requestType {
case eventsApi:
return handleEventRequest(request, m, w, r)
case hyperApi:
glog.V(4).Infof("Api - Hyper(%v)", request)
// Get the query request.
query, err := getContainerInfoRequest(r.Body)
if err != nil {
return err
}
var containers map[string]info.ContainerInfo
// map requests for "hyper/" to "hyper"
if len(request) == 1 && len(request[0]) == 0 {
request = request[:0]
}
switch len(request) {
case 0:
// Get all Hyper pods.
containers, err = m.AllHyperContainers(query)
if err != nil {
return fmt.Errorf("failed to get all Hyper pods with error: %v", err)
}
case 1:
// Get one Hyper pod.
var cont info.ContainerInfo
cont, err = m.HyperContainer(request[0], query)
if err != nil {
return fmt.Errorf("failed to get Docker container %q with error: %v", request[0], err)
}
containers = map[string]info.ContainerInfo{
cont.Name: cont,
}
default:
return fmt.Errorf("unknown request for Docker container %v", request)
}
// Only output the containers as JSON.
err = writeResult(containers, w)
if err != nil {
return err
}
return nil
default:
return self.baseVersion.HandleRequest(requestType, request, m, w, r)
}
}
func ServerContainersPage(m manager.Manager, w http.ResponseWriter, u *url.URL) error {
start := time.Now()
// The container name is the path after the handler
containerName := u.Path[len(ContainersPage)-1:]
// Get the container.
cont, err := m.GetContainerInfo(containerName)
if err != nil {
return fmt.Errorf("Failed to get container \"%s\" with error: %s", containerName, err)
}
// Get the MachineInfo
machineInfo, err := m.GetMachineInfo()
if err != nil {
return err
}
// Make a list of the parent containers and their links
var parentContainers []string
parentContainers = append(parentContainers, string("root"))
parentName := ""
for _, part := range strings.Split(string(cont.Name), "/") {
if part == "" {
continue
}
parentName += "/" + part
parentContainers = append(parentContainers, string(parentName))
}
data := &pageData{
ContainerName: cont.Name,
ParentContainers: parentContainers,
Subcontainers: cont.Subcontainers,
Spec: cont.Spec,
Stats: cont.Stats,
MachineInfo: machineInfo,
ResourcesAvailable: cont.Spec.Cpu != nil || cont.Spec.Memory != nil,
CpuAvailable: cont.Spec.Cpu != nil,
MemoryAvailable: cont.Spec.Memory != nil,
}
err = pageTemplate.Execute(w, data)
if err != nil {
log.Printf("Failed to apply template: %s", err)
}
log.Printf("Request took %s", time.Since(start))
return nil
}
func (self *version2_1) HandleRequest(requestType string, request []string, m manager.Manager, w http.ResponseWriter, r *http.Request) error {
// Get the query request.
opt, err := getRequestOptions(r)
if err != nil {
return err
}
switch requestType {
case machineStatsApi:
glog.V(4).Infof("Api - MachineStats(%v)", request)
cont, err := m.GetRequestedContainersInfo("/", opt)
if err != nil {
if len(cont) == 0 {
return err
}
glog.Errorf("Error calling GetRequestedContainersInfo: %v", err)
}
return writeResult(v2.MachineStatsFromV1(cont["/"]), w)
case statsApi:
name := getContainerName(request)
glog.V(4).Infof("Api - Stats: Looking for stats for container %q, options %+v", name, opt)
conts, err := m.GetRequestedContainersInfo(name, opt)
if err != nil {
if len(conts) == 0 {
return err
}
glog.Errorf("Error calling GetRequestedContainersInfo: %v", err)
}
contStats := make(map[string]v2.ContainerInfo, len(conts))
for name, cont := range conts {
if name == "/" {
// Root cgroup stats should be exposed as machine stats
continue
}
contStats[name] = v2.ContainerInfo{
Spec: v2.ContainerSpecFromV1(&cont.Spec, cont.Aliases, cont.Namespace),
Stats: v2.ContainerStatsFromV1(&cont.Spec, cont.Stats),
}
}
return writeResult(contStats, w)
default:
return self.baseVersion.HandleRequest(requestType, request, m, w, r)
}
}
func (self *version1_0) HandleRequest(requestType string, request []string, m manager.Manager, w http.ResponseWriter, r *http.Request) error {
switch requestType {
case machineApi:
glog.V(4).Infof("Api - Machine")
// Get the MachineInfo
machineInfo, err := m.GetMachineInfo()
if err != nil {
return err
}
err = writeResult(machineInfo, w)
if err != nil {
return err
}
case containersApi:
containerName := getContainerName(request)
glog.V(4).Infof("Api - Container(%s)", containerName)
// Get the query request.
query, err := getContainerInfoRequest(r.Body)
if err != nil {
return err
}
// Get the container.
cont, err := m.GetContainerInfo(containerName, query)
if err != nil {
return fmt.Errorf("failed to get container %q with error: %s", containerName, err)
}
// Only output the container as JSON.
err = writeResult(cont, w)
if err != nil {
return err
}
default:
return fmt.Errorf("unknown request type %q", requestType)
}
return nil
}
func handleEventRequest(request []string, m manager.Manager, w http.ResponseWriter, r *http.Request) error {
query, stream, err := getEventRequest(r)
if err != nil {
return err
}
query.ContainerName = path.Join("/", getContainerName(request))
glog.V(4).Infof("Api - Events(%v)", query)
if !stream {
pastEvents, err := m.GetPastEvents(query)
if err != nil {
return err
}
return writeResult(pastEvents, w)
}
eventChannel, err := m.WatchForEvents(query)
if err != nil {
return err
}
return streamResults(eventChannel, w, r, m)
}
func validateIoScheduler(containerManager manager.Manager) (string, string) {
var desc string
mi, err := containerManager.GetMachineInfo()
if err != nil {
return Unknown, "Machine info not available\n\t"
}
cfq := false
for _, disk := range mi.DiskMap {
desc += fmt.Sprintf("\t Disk %q Scheduler type %q.\n", disk.Name, disk.Scheduler)
if disk.Scheduler == "cfq" {
cfq = true
}
}
// Since we get lot of random block devices, report recommended if
// at least one of them is on cfq. Report Supported otherwise.
if cfq {
desc = "At least one device supports 'cfq' I/O scheduler. Some disk stats can be reported.\n" + desc
return Recommended, desc
}
desc = "None of the devices support 'cfq' I/O scheduler. No disk stats can be reported.\n" + desc
return Supported, desc
}
func (self *version2_0) HandleRequest(requestType string, request []string, m manager.Manager, w http.ResponseWriter, r *http.Request) error {
opt, err := getRequestOptions(r)
if err != nil {
return err
}
switch requestType {
case versionApi:
glog.V(4).Infof("Api - Version")
versionInfo, err := m.GetVersionInfo()
if err != nil {
return err
}
return writeResult(versionInfo.CadvisorVersion, w)
case attributesApi:
glog.V(4).Info("Api - Attributes")
machineInfo, err := m.GetMachineInfo()
if err != nil {
return err
}
versionInfo, err := m.GetVersionInfo()
if err != nil {
return err
}
info := v2.GetAttributes(machineInfo, versionInfo)
return writeResult(info, w)
case machineApi:
glog.V(4).Info("Api - Machine")
// TODO(rjnagal): Move machineInfo from v1.
machineInfo, err := m.GetMachineInfo()
if err != nil {
return err
}
return writeResult(machineInfo, w)
case summaryApi:
containerName := getContainerName(request)
glog.V(4).Infof("Api - Summary for container %q, options %+v", containerName, opt)
stats, err := m.GetDerivedStats(containerName, opt)
if err != nil {
return err
}
return writeResult(stats, w)
case statsApi:
name := getContainerName(request)
glog.V(4).Infof("Api - Stats: Looking for stats for container %q, options %+v", name, opt)
conts, err := m.GetRequestedContainersInfo(name, opt)
if err != nil {
return err
}
contStats := make(map[string][]v2.ContainerStats, 0)
for name, cont := range conts {
contStats[name] = convertStats(cont)
}
return writeResult(contStats, w)
case specApi:
containerName := getContainerName(request)
glog.V(4).Infof("Api - Spec for container %q, options %+v", containerName, opt)
specs, err := m.GetContainerSpec(containerName, opt)
if err != nil {
return err
}
return writeResult(specs, w)
case storageApi:
var err error
fi := []v2.FsInfo{}
label := r.URL.Query().Get("label")
if len(label) == 0 {
// Get all global filesystems info.
fi, err = m.GetFsInfo("")
if err != nil {
return err
}
} else {
// Get a specific label.
fi, err = m.GetFsInfo(label)
if err != nil {
return err
}
}
return writeResult(fi, w)
case eventsApi:
return handleEventRequest(request, m, w, r)
default:
return fmt.Errorf("unknown request type %q", requestType)
}
}
func serveDockerPage(m manager.Manager, w http.ResponseWriter, u *url.URL) error {
start := time.Now()
// The container name is the path after the handler
containerName := u.Path[len(DockerPage):]
rootDir := getRootDir(u.Path)
var data *pageData
if containerName == "" {
// Get the containers.
reqParams := info.ContainerInfoRequest{
NumStats: 0,
}
conts, err := m.AllDockerContainers(&reqParams)
if err != nil {
return fmt.Errorf("failed to get container %q with error: %v", containerName, err)
}
subcontainers := make([]link, 0, len(conts))
for _, cont := range conts {
subcontainers = append(subcontainers, link{
Text: getContainerDisplayName(cont.ContainerReference),
Link: path.Join("/docker", docker.ContainerNameToDockerId(cont.ContainerReference.Name)),
})
}
// Get Docker status
status, err := m.DockerInfo()
if err != nil {
return err
}
dockerStatus, driverStatus := toStatusKV(status)
// Get Docker Images
images, err := m.DockerImages()
if err != nil {
return err
}
dockerContainersText := "Docker Containers"
data = &pageData{
DisplayName: dockerContainersText,
ParentContainers: []link{
{
Text: dockerContainersText,
Link: DockerPage,
}},
Subcontainers: subcontainers,
Root: rootDir,
DockerStatus: dockerStatus,
DockerDriverStatus: driverStatus,
DockerImages: images,
}
} else {
// Get the container.
reqParams := info.ContainerInfoRequest{
NumStats: 60,
}
cont, err := m.DockerContainer(containerName, &reqParams)
if err != nil {
return fmt.Errorf("failed to get container %q with error: %v", containerName, err)
}
displayName := getContainerDisplayName(cont.ContainerReference)
// Make a list of the parent containers and their links
var parentContainers []link
parentContainers = append(parentContainers, link{
Text: "Docker containers",
Link: DockerPage,
})
parentContainers = append(parentContainers, link{
Text: displayName,
Link: path.Join(DockerPage, docker.ContainerNameToDockerId(cont.Name)),
})
// Get the MachineInfo
machineInfo, err := m.GetMachineInfo()
if err != nil {
return err
}
data = &pageData{
DisplayName: displayName,
ContainerName: cont.Name,
ParentContainers: parentContainers,
Spec: cont.Spec,
Stats: cont.Stats,
MachineInfo: machineInfo,
ResourcesAvailable: cont.Spec.HasCpu || cont.Spec.HasMemory || cont.Spec.HasNetwork,
CpuAvailable: cont.Spec.HasCpu,
MemoryAvailable: cont.Spec.HasMemory,
NetworkAvailable: cont.Spec.HasNetwork,
FsAvailable: cont.Spec.HasFilesystem,
Root: rootDir,
}
}
err := pageTemplate.Execute(w, data)
if err != nil {
glog.Errorf("Failed to apply template: %s", err)
}
glog.V(5).Infof("Request took %s", time.Since(start))
return nil
}
func ServerContainersPage(m manager.Manager, w http.ResponseWriter, u *url.URL) error {
start := time.Now()
// The container name is the path after the handler
containerName := u.Path[len(ContainersPage)-1:]
// Get the container.
reqParams := info.ContainerInfoRequest{
NumStats: 60,
NumSamples: 60,
}
cont, err := m.GetContainerInfo(containerName, &reqParams)
if err != nil {
return fmt.Errorf("Failed to get container \"%s\" with error: %s", containerName, err)
}
// Get the MachineInfo
machineInfo, err := m.GetMachineInfo()
if err != nil {
return err
}
// Make a list of the parent containers and their links
var parentContainers []info.ContainerReference
parentContainers = append(parentContainers, info.ContainerReference{Name: "root"})
parentName := ""
for _, part := range strings.Split(string(cont.Name), "/") {
if part == "" {
continue
}
parentName += "/" + part
parentContainers = append(parentContainers, info.ContainerReference{Name: parentName})
}
// Pick the shortest name of the container as the display name.
displayName := cont.Name
for _, alias := range cont.Aliases {
if len(displayName) >= len(alias) {
displayName = alias
}
}
// Replace the last part of the parent containers with the displayName.
if displayName != cont.Name {
parentContainers[len(parentContainers)-1] = info.ContainerReference{
Name: fmt.Sprintf("%s (%s)", displayName, path.Base(cont.Name)),
}
}
data := &pageData{
ContainerName: displayName,
// TODO(vmarmol): Only use strings for this.
ParentContainers: parentContainers,
Subcontainers: cont.Subcontainers,
Spec: cont.Spec,
Stats: cont.Stats,
MachineInfo: machineInfo,
ResourcesAvailable: cont.Spec.Cpu != nil || cont.Spec.Memory != nil,
CpuAvailable: cont.Spec.Cpu != nil,
MemoryAvailable: cont.Spec.Memory != nil,
}
err = pageTemplate.Execute(w, data)
if err != nil {
log.Printf("Failed to apply template: %s", err)
}
log.Printf("Request took %s", time.Since(start))
return nil
}
func handleRequest(m manager.Manager, w http.ResponseWriter, r *http.Request) error {
start := time.Now()
request := r.URL.Path
requestElements := strings.Split(r.URL.Path, "/")
// Verify that we have all the elements we expect:
// <empty>/api/<version>/<request type>[/<args...>]
// [0] [1] [2] [3] [4...]
if len(requestElements) < 4 {
return fmt.Errorf("incomplete API request %q", request)
}
// Get all the element parts.
emptyElement := requestElements[0]
apiElement := requestElements[1]
version := requestElements[2]
requestType := requestElements[3]
requestArgs := []string{}
if len(requestElements) > 4 {
requestArgs = requestElements[4:]
}
// The container name is the path after the requestType.
containerName := path.Join("/", strings.Join(requestArgs, "/"))
// Check elements.
if len(emptyElement) != 0 {
return fmt.Errorf("unexpected API request format %q", request)
}
if apiElement != "api" {
return fmt.Errorf("invalid API request format %q", request)
}
if _, ok := supportedApiVersions[version]; !ok {
return fmt.Errorf("unsupported API version %q", version)
}
switch {
case requestType == machineApi:
glog.V(2).Infof("Api - Machine")
// Get the MachineInfo
machineInfo, err := m.GetMachineInfo()
if err != nil {
return err
}
err = writeResult(machineInfo, w)
if err != nil {
return err
}
case requestType == containersApi:
glog.V(2).Infof("Api - Container(%s)", containerName)
// Get the query request.
query, err := getContainerInfoRequest(r.Body)
if err != nil {
return err
}
// Get the container.
cont, err := m.GetContainerInfo(containerName, query)
if err != nil {
return fmt.Errorf("failed to get container %q with error: %s", containerName, err)
}
// Only output the container as JSON.
err = writeResult(cont, w)
if err != nil {
return err
}
case requestType == subcontainersApi:
if version == version1_0 {
return fmt.Errorf("request type of %q not supported in API version %q", requestType, version)
}
glog.V(2).Infof("Api - Subcontainers(%s)", containerName)
// Get the query request.
query, err := getContainerInfoRequest(r.Body)
if err != nil {
return err
}
// Get the subcontainers.
containers, err := m.SubcontainersInfo(containerName, query)
if err != nil {
return fmt.Errorf("failed to get subcontainers for container %q with error: %s", containerName, err)
}
// Only output the containers as JSON.
err = writeResult(containers, w)
if err != nil {
return err
}
case requestType == dockerApi:
if version == version1_0 || version == version1_1 {
return fmt.Errorf("request type of %q not supported in API version %q", requestType, version)
}
glog.V(2).Infof("Api - Docker(%s)", containerName)
// Get the query request.
query, err := getContainerInfoRequest(r.Body)
if err != nil {
return err
}
// Get the Docker containers.
containers, err := m.DockerContainersInfo(containerName, query)
if err != nil {
return fmt.Errorf("failed to get docker containers for %q with error: %s", containerName, err)
}
// Only output the containers as JSON.
err = writeResult(containers, w)
if err != nil {
return err
}
default:
return fmt.Errorf("unknown API request type %q", requestType)
}
glog.V(2).Infof("Request took %s", time.Since(start))
return nil
}
func (self *version2_0) HandleRequest(requestType string, request []string, m manager.Manager, w http.ResponseWriter, r *http.Request) error {
opt, err := getRequestOptions(r)
if err != nil {
return err
}
switch requestType {
case versionApi:
glog.V(4).Infof("Api - Version")
versionInfo, err := m.GetVersionInfo()
if err != nil {
return err
}
return writeResult(versionInfo.CadvisorVersion, w)
case attributesApi:
glog.V(4).Info("Api - Attributes")
machineInfo, err := m.GetMachineInfo()
if err != nil {
return err
}
versionInfo, err := m.GetVersionInfo()
if err != nil {
return err
}
info := v2.GetAttributes(machineInfo, versionInfo)
return writeResult(info, w)
case machineApi:
glog.V(4).Info("Api - Machine")
// TODO(rjnagal): Move machineInfo from v1.
machineInfo, err := m.GetMachineInfo()
if err != nil {
return err
}
return writeResult(machineInfo, w)
case summaryApi:
containerName := getContainerName(request)
glog.V(4).Infof("Api - Summary for container %q, options %+v", containerName, opt)
stats, err := m.GetDerivedStats(containerName, opt)
if err != nil {
return err
}
return writeResult(stats, w)
case statsApi:
name := getContainerName(request)
glog.V(4).Infof("Api - Stats: Looking for stats for container %q, options %+v", name, opt)
conts, err := m.GetRequestedContainersInfo(name, opt)
if err != nil {
return err
}
contStats := make(map[string][]v2.ContainerStats, 0)
for name, cont := range conts {
contStats[name] = convertStats(cont)
}
return writeResult(contStats, w)
case customMetricsApi:
containerName := getContainerName(request)
glog.V(4).Infof("Api - Custom Metrics: Looking for metrics for container %q, options %+v", containerName, opt)
conts, err := m.GetRequestedContainersInfo(containerName, opt)
if err != nil {
return err
}
contMetrics := make(map[string]map[string]map[string][]info.MetricValBasic, 0)
for _, cont := range conts {
metrics := make(map[string]map[string][]info.MetricValBasic, 0)
contStats := convertStats(cont)
for _, contStat := range contStats {
if contStat.HasCustomMetrics {
for name, allLabels := range contStat.CustomMetrics {
metricLabels := make(map[string][]info.MetricValBasic, 0)
for _, metric := range allLabels {
if !metric.Timestamp.IsZero() {
metVal := info.MetricValBasic{
Timestamp: metric.Timestamp,
IntValue: metric.IntValue,
FloatValue: metric.FloatValue,
}
labels := metrics[name]
if labels != nil {
values := labels[metric.Label]
values = append(values, metVal)
labels[metric.Label] = values
metrics[name] = labels
} else {
metricLabels[metric.Label] = []info.MetricValBasic{metVal}
metrics[name] = metricLabels
}
}
}
}
}
}
contMetrics[containerName] = metrics
}
return writeResult(contMetrics, w)
case specApi:
containerName := getContainerName(request)
glog.V(4).Infof("Api - Spec for container %q, options %+v", containerName, opt)
specs, err := m.GetContainerSpec(containerName, opt)
if err != nil {
return err
}
return writeResult(specs, w)
case storageApi:
var err error
fi := []v2.FsInfo{}
label := r.URL.Query().Get("label")
if len(label) == 0 {
// Get all global filesystems info.
fi, err = m.GetFsInfo("")
if err != nil {
return err
}
} else {
// Get a specific label.
fi, err = m.GetFsInfo(label)
if err != nil {
return err
}
}
return writeResult(fi, w)
case eventsApi:
return handleEventRequest(request, m, w, r)
case psApi:
// reuse container type from request.
// ignore recursive.
// TODO(rjnagal): consider count to limit ps output.
name := getContainerName(request)
glog.V(4).Infof("Api - Spec for container %q, options %+v", name, opt)
ps, err := m.GetProcessList(name, opt)
if err != nil {
return fmt.Errorf("process listing failed: %v", err)
}
return writeResult(ps, w)
default:
return fmt.Errorf("unknown request type %q", requestType)
}
}
func serveContainersPage(m manager.Manager, w http.ResponseWriter, u *url.URL) error {
start := time.Now()
// The container name is the path after the handler
containerName := u.Path[len(ContainersPage)-1:]
// Get the container.
reqParams := info.ContainerInfoRequest{
NumStats: 60,
}
cont, err := m.GetContainerInfo(containerName, &reqParams)
if err != nil {
return fmt.Errorf("failed to get container %q with error: %v", containerName, err)
}
displayName := getContainerDisplayName(cont.ContainerReference)
// Get the MachineInfo
machineInfo, err := m.GetMachineInfo()
if err != nil {
return err
}
// Make a list of the parent containers and their links
pathParts := strings.Split(string(cont.Name), "/")
parentContainers := make([]link, 0, len(pathParts))
parentContainers = append(parentContainers, link{
Text: "root",
Link: ContainersPage,
})
for i := 1; i < len(pathParts); i++ {
// Skip empty parts.
if pathParts[i] == "" {
continue
}
parentContainers = append(parentContainers, link{
Text: pathParts[i],
Link: path.Join(ContainersPage, path.Join(pathParts[1:i+1]...)),
})
}
// Build the links for the subcontainers.
subcontainerLinks := make([]link, 0, len(cont.Subcontainers))
for _, sub := range cont.Subcontainers {
subcontainerLinks = append(subcontainerLinks, link{
Text: getContainerDisplayName(sub),
Link: path.Join(ContainersPage, sub.Name),
})
}
data := &pageData{
DisplayName: displayName,
ContainerName: cont.Name,
ParentContainers: parentContainers,
Subcontainers: subcontainerLinks,
Spec: cont.Spec,
Stats: cont.Stats,
MachineInfo: machineInfo,
IsRoot: cont.Name == "/",
ResourcesAvailable: cont.Spec.HasCpu || cont.Spec.HasMemory || cont.Spec.HasNetwork || cont.Spec.HasFilesystem,
CpuAvailable: cont.Spec.HasCpu,
MemoryAvailable: cont.Spec.HasMemory,
NetworkAvailable: cont.Spec.HasNetwork,
FsAvailable: cont.Spec.HasFilesystem,
}
err = pageTemplate.Execute(w, data)
if err != nil {
glog.Errorf("Failed to apply template: %s", err)
}
glog.V(1).Infof("Request took %s", time.Since(start))
return nil
}
func HandleRequest(m manager.Manager, w http.ResponseWriter, r *http.Request) error {
start := time.Now()
u := r.URL
// Get API request type.
requestType := u.Path[len(ApiResource):]
i := strings.Index(requestType, "/")
requestArgs := ""
if i != -1 {
requestArgs = requestType[i:]
requestType = requestType[:i]
}
switch {
case requestType == MachineApi:
log.Printf("Api - Machine")
// Get the MachineInfo
machineInfo, err := m.GetMachineInfo()
if err != nil {
return err
}
out, err := json.Marshal(machineInfo)
if err != nil {
fmt.Fprintf(w, "Failed to marshall MachineInfo with error: %s", err)
}
w.Write(out)
case requestType == ContainersApi:
// The container name is the path after the requestType
containerName := requestArgs
log.Printf("Api - Container(%s)", containerName)
var query info.ContainerInfoRequest
// If a user does not specify number of stats/samples he wants,
// it's 64 by default
query.NumStats = 64
query.NumSamples = 64
decoder := json.NewDecoder(r.Body)
err := decoder.Decode(&query)
if err != nil && err != io.EOF {
return fmt.Errorf("unable to decode the json value: ", err)
}
// Get the container.
cont, err := m.GetContainerInfo(containerName, &query)
if err != nil {
fmt.Fprintf(w, "Failed to get container \"%s\" with error: %s", containerName, err)
return err
}
// Only output the container as JSON.
out, err := json.Marshal(cont)
if err != nil {
fmt.Fprintf(w, "Failed to marshall container %q with error: %s", containerName, err)
}
w.Write(out)
default:
return fmt.Errorf("unknown API request type %q", requestType)
}
log.Printf("Request took %s", time.Since(start))
return nil
}