func (b *buildCache) GetWithRemoteAPI(ctx context.Context, image string) (io.ReadCloser, error) {
v, err := b.client.ServerVersion(ctx)
if err != nil {
return nil, err
}
if versions.LessThan(v.Version, "1.11.0") {
return nil, fmt.Errorf("Buildcache needs at least Docker version v1.11")
}
if versions.LessThan(v.Version, "1.12.0") {
logrus.Warnf("Docker versions before v1.12.0 have a bug causing extracting build cache through remote API to take very long time and use lots of disk space. Please consider upgrading before using this tool.")
}
id, err := b.getImageID(ctx, image)
if err != nil {
return nil, err
}
ids, err := b.getParentIDS(ctx, id)
if err != nil {
return nil, err
}
rc, err := b.client.ImageSave(ctx, ids)
if err != nil {
return nil, err
}
return b.filterSaveArchive(rc), nil
}
func (s *containerRouter) postContainersCreate(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
if err := httputils.ParseForm(r); err != nil {
return err
}
if err := httputils.CheckForJSON(r); err != nil {
return err
}
name := r.Form.Get("name")
config, hostConfig, networkingConfig, err := s.decoder.DecodeConfig(r.Body)
if err != nil {
return err
}
version := httputils.VersionFromContext(ctx)
adjustCPUShares := versions.LessThan(version, "1.19")
ccr, err := s.backend.ContainerCreate(types.ContainerCreateConfig{
Name: name,
Config: config,
HostConfig: hostConfig,
NetworkingConfig: networkingConfig,
AdjustCPUShares: adjustCPUShares,
})
if err != nil {
return err
}
return httputils.WriteJSON(w, http.StatusCreated, ccr)
}
func (s *DockerSuite) TestApiStatsNetworkStatsVersioning(c *check.C) {
testRequires(c, SameHostDaemon)
testRequires(c, DaemonIsLinux)
out, _ := runSleepingContainer(c)
id := strings.TrimSpace(out)
c.Assert(waitRun(id), checker.IsNil)
wg := sync.WaitGroup{}
for i := 17; i <= 21; i++ {
wg.Add(1)
go func() {
defer wg.Done()
apiVersion := fmt.Sprintf("v1.%d", i)
statsJSONBlob := getVersionedStats(c, id, apiVersion)
if versions.LessThan(apiVersion, "v1.21") {
c.Assert(jsonBlobHasLTv121NetworkStats(statsJSONBlob), checker.Equals, true,
check.Commentf("Stats JSON blob from API %s %#v does not look like a <v1.21 API stats structure", apiVersion, statsJSONBlob))
} else {
c.Assert(jsonBlobHasGTE121NetworkStats(statsJSONBlob), checker.Equals, true,
check.Commentf("Stats JSON blob from API %s %#v does not look like a >=v1.21 API stats structure", apiVersion, statsJSONBlob))
}
}()
}
wg.Wait()
}
func (v apiVersion) Compare(other string) (int, error) {
if dockerapiversion.LessThan(string(v), other) {
return -1, nil
} else if dockerapiversion.GreaterThan(string(v), other) {
return 1, nil
}
return 0, nil
}
// ContainerInspect returns low-level information about a
// container. Returns an error if the container cannot be found, or if
// there is an error getting the data.
func (daemon *Daemon) ContainerInspect(name string, size bool, version string) (interface{}, error) {
switch {
case versions.LessThan(version, "1.20"):
return daemon.containerInspectPre120(name)
case versions.Equal(version, "1.20"):
return daemon.containerInspect120(name)
}
return daemon.ContainerInspectCurrent(name, size)
}
func (s *systemRouter) getInfo(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
info, err := s.backend.SystemInfo()
if err != nil {
return err
}
if s.clusterProvider != nil {
info.Swarm = s.clusterProvider.Info()
}
if versions.LessThan("1.25", httputils.VersionFromContext(ctx)) {
// TODO: handle this conversion in engine-api
type oldInfo struct {
*types.Info
ExecutionDriver string
}
return httputils.WriteJSON(w, http.StatusOK, &oldInfo{Info: info, ExecutionDriver: "<not supported>"})
}
return httputils.WriteJSON(w, http.StatusOK, info)
}
// ToParamWithVersion packs the Args into a string for easy transport from client to server.
// The generated string will depend on the specified version (corresponding to the API version).
func ToParamWithVersion(version string, a Args) (string, error) {
// this way we don't URL encode {}, just empty space
if a.Len() == 0 {
return "", nil
}
// for daemons older than v1.10, filter must be of the form map[string][]string
buf := []byte{}
err := errors.New("")
if version != "" && versions.LessThan(version, "1.22") {
buf, err = json.Marshal(convertArgsToSlice(a.fields))
} else {
buf, err = json.Marshal(a.fields)
}
if err != nil {
return "", err
}
return string(buf), nil
}
// WrapHandler returns a new handler function wrapping the previous one in the request chain.
func (v VersionMiddleware) WrapHandler(handler func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error) func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
return func(ctx context.Context, w http.ResponseWriter, r *http.Request, vars map[string]string) error {
apiVersion := vars["version"]
if apiVersion == "" {
apiVersion = v.defaultVersion
}
if versions.GreaterThan(apiVersion, v.defaultVersion) {
return badRequestError{fmt.Errorf("client is newer than server (client API version: %s, server API version: %s)", apiVersion, v.defaultVersion)}
}
if versions.LessThan(apiVersion, v.minVersion) {
return badRequestError{fmt.Errorf("client version %s is too old. Minimum supported API version is %s, please upgrade your client to a newer version", apiVersion, v.minVersion)}
}
header := fmt.Sprintf("Docker/%s (%s)", v.serverVersion, runtime.GOOS)
w.Header().Set("Server", header)
ctx = context.WithValue(ctx, "api-version", apiVersion)
return handler(ctx, w, r, vars)
}
}
// MakeConfigFromV1Config creates an image config from the legacy V1 config format.
func MakeConfigFromV1Config(imageJSON []byte, rootfs *image.RootFS, history []image.History) ([]byte, error) {
var dver struct {
DockerVersion string `json:"docker_version"`
}
if err := json.Unmarshal(imageJSON, &dver); err != nil {
return nil, err
}
useFallback := versions.LessThan(dver.DockerVersion, noFallbackMinVersion)
if useFallback {
var v1Image image.V1Image
err := json.Unmarshal(imageJSON, &v1Image)
if err != nil {
return nil, err
}
imageJSON, err = json.Marshal(v1Image)
if err != nil {
return nil, err
}
}
var c map[string]*json.RawMessage
if err := json.Unmarshal(imageJSON, &c); err != nil {
return nil, err
}
delete(c, "id")
delete(c, "parent")
delete(c, "Size") // Size is calculated from data on disk and is inconsistent
delete(c, "parent_id")
delete(c, "layer_id")
delete(c, "throwaway")
c["rootfs"] = rawJSON(rootfs)
c["history"] = rawJSON(history)
return json.Marshal(c)
}
// ContainerStats writes information about the container to the stream
// given in the config object.
func (daemon *Daemon) ContainerStats(ctx context.Context, prefixOrName string, config *backend.ContainerStatsConfig) error {
if runtime.GOOS == "windows" {
return errors.New("Windows does not support stats")
}
// Remote API version (used for backwards compatibility)
apiVersion := config.Version
container, err := daemon.GetContainer(prefixOrName)
if err != nil {
return err
}
// If the container is not running and requires no stream, return an empty stats.
if !container.IsRunning() && !config.Stream {
return json.NewEncoder(config.OutStream).Encode(&types.Stats{})
}
outStream := config.OutStream
if config.Stream {
wf := ioutils.NewWriteFlusher(outStream)
defer wf.Close()
wf.Flush()
outStream = wf
}
var preCPUStats types.CPUStats
getStatJSON := func(v interface{}) *types.StatsJSON {
ss := v.(types.StatsJSON)
ss.PreCPUStats = preCPUStats
// ss.MemoryStats.Limit = uint64(update.MemoryLimit)
preCPUStats = ss.CPUStats
return &ss
}
enc := json.NewEncoder(outStream)
updates := daemon.subscribeToContainerStats(container)
defer daemon.unsubscribeToContainerStats(container, updates)
noStreamFirstFrame := true
for {
select {
case v, ok := <-updates:
if !ok {
return nil
}
var statsJSON interface{}
statsJSONPost120 := getStatJSON(v)
if versions.LessThan(apiVersion, "1.21") {
var (
rxBytes uint64
rxPackets uint64
rxErrors uint64
rxDropped uint64
txBytes uint64
txPackets uint64
txErrors uint64
txDropped uint64
)
for _, v := range statsJSONPost120.Networks {
rxBytes += v.RxBytes
rxPackets += v.RxPackets
rxErrors += v.RxErrors
rxDropped += v.RxDropped
txBytes += v.TxBytes
txPackets += v.TxPackets
txErrors += v.TxErrors
txDropped += v.TxDropped
}
statsJSON = &v1p20.StatsJSON{
Stats: statsJSONPost120.Stats,
Network: types.NetworkStats{
RxBytes: rxBytes,
RxPackets: rxPackets,
RxErrors: rxErrors,
RxDropped: rxDropped,
TxBytes: txBytes,
TxPackets: txPackets,
TxErrors: txErrors,
TxDropped: txDropped,
},
}
} else {
statsJSON = statsJSONPost120
}
if !config.Stream && noStreamFirstFrame {
// prime the cpu stats so they aren't 0 in the final output
noStreamFirstFrame = false
continue
}
if err := enc.Encode(statsJSON); err != nil {
return err
}
if !config.Stream {
return nil
}
case <-ctx.Done():
return nil
}
}
}
