forked from AliyunContainerService/pouch
/
image_bridge.go
195 lines (158 loc) · 5.17 KB
/
image_bridge.go
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package server
import (
"context"
"encoding/base64"
"encoding/json"
"fmt"
"io"
"net/http"
"strings"
"time"
"github.com/alibaba/pouch/apis/metrics"
"github.com/alibaba/pouch/apis/types"
"github.com/alibaba/pouch/daemon/mgr"
"github.com/alibaba/pouch/pkg/httputils"
"github.com/gorilla/mux"
"github.com/opencontainers/go-digest"
"github.com/sirupsen/logrus"
)
// pullImage will pull an image from a specified registry.
func (s *Server) pullImage(ctx context.Context, rw http.ResponseWriter, req *http.Request) error {
image := req.FormValue("fromImage")
tag := req.FormValue("tag")
if image == "" {
err := fmt.Errorf("fromImage cannot be empty")
return httputils.NewHTTPError(err, http.StatusBadRequest)
}
if tag != "" {
image = image + ":" + tag
}
// record the time spent during image pull procedure.
defer func(start time.Time) {
metrics.ImagePullSummary.WithLabelValues(image).Observe(metrics.SinceInMicroseconds(start))
}(time.Now())
// get registry auth from Request header
authStr := req.Header.Get("X-Registry-Auth")
authConfig := types.AuthConfig{}
if authStr != "" {
data := base64.NewDecoder(base64.URLEncoding, strings.NewReader(authStr))
if err := json.NewDecoder(data).Decode(&authConfig); err != nil {
return err
}
}
// Error information has be sent to client, so no need call resp.Write
if err := s.ImageMgr.PullImage(ctx, image, &authConfig, newWriteFlusher(rw)); err != nil {
logrus.Errorf("failed to pull image %s: %v", image, err)
return nil
}
return nil
}
func (s *Server) getImage(ctx context.Context, rw http.ResponseWriter, req *http.Request) error {
idOrRef := mux.Vars(req)["name"]
imageInfo, err := s.ImageMgr.GetImage(ctx, idOrRef)
if err != nil {
logrus.Errorf("failed to get image: %v", err)
return err
}
return EncodeResponse(rw, http.StatusOK, imageInfo)
}
func (s *Server) listImages(ctx context.Context, rw http.ResponseWriter, req *http.Request) error {
filters := req.FormValue("filters")
imageList, err := s.ImageMgr.ListImages(ctx, filters)
if err != nil {
logrus.Errorf("failed to list images: %v", err)
return err
}
return EncodeResponse(rw, http.StatusOK, imageList)
}
func (s *Server) searchImages(ctx context.Context, rw http.ResponseWriter, req *http.Request) error {
searchPattern := req.FormValue("term")
registry := req.FormValue("registry")
searchResultItem, err := s.ImageMgr.SearchImages(ctx, searchPattern, registry)
if err != nil {
logrus.Errorf("failed to search images from resgitry: %v", err)
return err
}
return EncodeResponse(rw, http.StatusOK, searchResultItem)
}
// removeImage deletes an image by reference.
func (s *Server) removeImage(ctx context.Context, rw http.ResponseWriter, req *http.Request) error {
name := mux.Vars(req)["name"]
image, err := s.ImageMgr.GetImage(ctx, name)
if err != nil {
return err
}
refs, err := s.ImageMgr.ListReferences(ctx, digest.Digest(image.ID))
if err != nil {
return err
}
isForce := httputils.BoolValue(req, "force")
// We only should check the image whether used by container when there is only one primary reference.
if len(refs) == 1 {
containers, err := s.ContainerMgr.List(ctx, &mgr.ContainerListOption{
All: true,
FilterFunc: func(c *mgr.Container) bool {
return c.Image == image.ID
}})
if err != nil {
return err
}
if !isForce && len(containers) > 0 {
return fmt.Errorf("Unable to remove the image %q (must force) - container (%s, %s) is using this image", image.ID, containers[0].ID, containers[0].Name)
}
}
if err := s.ImageMgr.RemoveImage(ctx, name, isForce); err != nil {
return err
}
rw.WriteHeader(http.StatusNoContent)
return nil
}
// postImageTag adds tag for the existing image.
func (s *Server) postImageTag(ctx context.Context, rw http.ResponseWriter, req *http.Request) error {
name := mux.Vars(req)["name"]
targetRef := req.FormValue("repo")
if tag := req.FormValue("tag"); tag != "" {
targetRef = fmt.Sprintf("%s:%s", targetRef, tag)
}
if err := s.ImageMgr.AddTag(ctx, name, targetRef); err != nil {
return err
}
rw.WriteHeader(http.StatusCreated)
return nil
}
// loadImage loads an image by http tar stream.
func (s *Server) loadImage(ctx context.Context, rw http.ResponseWriter, req *http.Request) error {
imageName := req.FormValue("name")
if imageName == "" {
imageName = "unknown/unknown"
}
if err := s.ImageMgr.LoadImage(ctx, imageName, req.Body); err != nil {
return err
}
rw.WriteHeader(http.StatusOK)
return nil
}
// saveImage saves an image by http tar stream.
func (s *Server) saveImage(ctx context.Context, rw http.ResponseWriter, req *http.Request) error {
imageName := req.FormValue("name")
rw.Header().Set("Content-Type", "application/x-tar")
r, err := s.ImageMgr.SaveImage(ctx, imageName)
if err != nil {
return err
}
defer r.Close()
output := newWriteFlusher(rw)
if _, err := io.Copy(output, r); err != nil {
return err
}
return nil
}
// getImageHistory gets image history.
func (s *Server) getImageHistory(ctx context.Context, rw http.ResponseWriter, req *http.Request) error {
imageName := mux.Vars(req)["name"]
history, err := s.ImageMgr.ImageHistory(ctx, imageName)
if err != nil {
return err
}
return EncodeResponse(rw, http.StatusOK, history)
}