// handleContainer handles container requests against the Kubelet.
func (s *Server) handleContainer(w http.ResponseWriter, req *http.Request) {
defer req.Body.Close()
data, err := ioutil.ReadAll(req.Body)
if err != nil {
s.error(w, err)
return
}
// This is to provide backward compatibility. It only supports a single manifest
var pod api.BoundPod
var containerManifest api.ContainerManifest
err = yaml.Unmarshal(data, &containerManifest)
if err != nil {
s.error(w, err)
return
}
pod.Name = containerManifest.ID
pod.UID = containerManifest.UUID
pod.Spec.Containers = containerManifest.Containers
pod.Spec.Volumes = containerManifest.Volumes
pod.Spec.RestartPolicy = containerManifest.RestartPolicy
//TODO: sha1 of manifest?
if pod.Name == "" {
pod.Name = "1"
}
if pod.UID == "" {
pod.UID = "1"
}
s.updates <- PodUpdate{[]api.BoundPod{pod}, SET}
}
func applyDefaults(pod *api.BoundPod, url string) {
if len(pod.UID) == 0 {
hasher := md5.New()
fmt.Fprintf(hasher, "url:%s", url)
util.DeepHashObject(hasher, pod)
pod.UID = types.UID(hex.EncodeToString(hasher.Sum(nil)[0:]))
glog.V(5).Infof("Generated UID %q for pod %q from URL %s", pod.UID, pod.Name, url)
}
// This is required for backward compatibility, and should be removed once we
// completely deprecate ContainerManifest.
if len(pod.Name) == 0 {
pod.Name = string(pod.UID)
glog.V(5).Infof("Generate Name %q from UID %q from URL %s", pod.Name, pod.UID, url)
}
if len(pod.Namespace) == 0 {
hasher := adler32.New()
fmt.Fprint(hasher, url)
pod.Namespace = fmt.Sprintf("url-%08x", hasher.Sum32())
glog.V(5).Infof("Generated namespace %q for pod %q from URL %s", pod.Namespace, pod.Name, url)
}
}
func extractFromFile(filename string) (api.BoundPod, error) {
var pod api.BoundPod
glog.V(3).Infof("Reading config file %q", filename)
file, err := os.Open(filename)
if err != nil {
return pod, err
}
defer file.Close()
data, err := ioutil.ReadAll(file)
if err != nil {
return pod, err
}
manifest := &api.ContainerManifest{}
// TODO: use api.Scheme.DecodeInto
if err := yaml.Unmarshal(data, manifest); err != nil {
return pod, fmt.Errorf("can't unmarshal file %q: %v", filename, err)
}
if err := api.Scheme.Convert(manifest, &pod); err != nil {
return pod, fmt.Errorf("can't convert pod from file %q: %v", filename, err)
}
pod.Name = simpleSubdomainSafeHash(filename)
if len(pod.UID) == 0 {
pod.UID = simpleSubdomainSafeHash(filename)
}
if len(pod.Namespace) == 0 {
pod.Namespace = api.NamespaceDefault
}
if glog.V(4) {
glog.Infof("Got pod from file %q: %#v", filename, pod)
} else {
glog.V(1).Infof("Got pod from file %q: %s.%s (%s)", filename, pod.Namespace, pod.Name, pod.UID)
}
return pod, nil
}
func extractFromFile(filename string) (api.BoundPod, error) {
var pod api.BoundPod
glog.V(3).Infof("Reading config file %q", filename)
file, err := os.Open(filename)
if err != nil {
return pod, err
}
defer file.Close()
data, err := ioutil.ReadAll(file)
if err != nil {
return pod, err
}
// TODO: use api.Scheme.DecodeInto
// This is awful. DecodeInto() expects to find an APIObject, which
// Manifest is not. We keep reading manifest for now for compat, but
// we will eventually change it to read Pod (at which point this all
// becomes nicer). Until then, we assert that the ContainerManifest
// structure on disk is always v1beta1. Read that, convert it to a
// "current" ContainerManifest (should be ~identical), then convert
// that to a BoundPod (which is a well-understood conversion). This
// avoids writing a v1beta1.ContainerManifest -> api.BoundPod
// conversion which would be identical to the api.ContainerManifest ->
// api.BoundPod conversion.
oldManifest := &v1beta1.ContainerManifest{}
if err := yaml.Unmarshal(data, oldManifest); err != nil {
return pod, fmt.Errorf("can't unmarshal file %q: %v", filename, err)
}
newManifest := &api.ContainerManifest{}
if err := api.Scheme.Convert(oldManifest, newManifest); err != nil {
return pod, fmt.Errorf("can't convert pod from file %q: %v", filename, err)
}
if err := api.Scheme.Convert(newManifest, &pod); err != nil {
return pod, fmt.Errorf("can't convert pod from file %q: %v", filename, err)
}
hostname, err := os.Hostname() //TODO: kubelet name would be better
if err != nil {
return pod, err
}
if len(pod.UID) == 0 {
hasher := md5.New()
fmt.Fprintf(hasher, "host:%s", hostname)
fmt.Fprintf(hasher, "file:%s", filename)
util.DeepHashObject(hasher, pod)
pod.UID = types.UID(hex.EncodeToString(hasher.Sum(nil)[0:]))
glog.V(5).Infof("Generated UID %q for pod %q from file %s", pod.UID, pod.Name, filename)
}
// This is required for backward compatibility, and should be removed once we
// completely deprecate ContainerManifest.
if len(pod.Name) == 0 {
pod.Name = string(pod.UID)
glog.V(5).Infof("Generated Name %q for UID %q from file %s", pod.Name, pod.UID, filename)
}
if len(pod.Namespace) == 0 {
hasher := adler32.New()
fmt.Fprint(hasher, filename)
// TODO: file-<sum>.hostname would be better, if DNS subdomains
// are allowed for namespace (some places only allow DNS
// labels).
pod.Namespace = fmt.Sprintf("file-%08x-%s", hasher.Sum32(), hostname)
glog.V(5).Infof("Generated namespace %q for pod %q from file %s", pod.Namespace, pod.Name, filename)
}
// TODO(dchen1107): BoundPod is not type of runtime.Object. Once we allow kubelet talks
// about Pod directly, we can use SelfLinker defined in package: latest
// Currently just simply follow the same format in resthandler.go
pod.ObjectMeta.SelfLink = fmt.Sprintf("/api/v1beta2/pods/%s?namespace=%s",
pod.Name, pod.Namespace)
if glog.V(4) {
glog.Infof("Got pod from file %q: %#v", filename, pod)
} else {
glog.V(1).Infof("Got pod from file %q: %s.%s (%s)", filename, pod.Namespace, pod.Name, pod.UID)
}
return pod, nil
}
func (s *sourceURL) extractFromURL() error {
resp, err := http.Get(s.url)
if err != nil {
return err
}
defer resp.Body.Close()
data, err := ioutil.ReadAll(resp.Body)
if err != nil {
return err
}
if resp.StatusCode != 200 {
return fmt.Errorf("%v: %v", s.url, resp.Status)
}
if len(data) == 0 {
return fmt.Errorf("zero-length data received from %v", s.url)
}
// Short circuit if the manifest has not changed since the last time it was read.
if bytes.Compare(data, s.data) == 0 {
return nil
}
s.data = data
// First try as if it's a single manifest
var manifest api.ContainerManifest
// TODO: should be api.Scheme.Decode
singleErr := yaml.Unmarshal(data, &manifest)
if singleErr == nil {
if errs := validation.ValidateManifest(&manifest); len(errs) > 0 {
singleErr = fmt.Errorf("invalid manifest: %v", errs)
}
}
if singleErr == nil {
pod := api.BoundPod{}
if err := api.Scheme.Convert(&manifest, &pod); err != nil {
return err
}
if len(pod.Name) == 0 {
pod.Name = "1"
}
if len(pod.Namespace) == 0 {
pod.Namespace = api.NamespaceDefault
}
s.updates <- kubelet.PodUpdate{[]api.BoundPod{pod}, kubelet.SET}
return nil
}
// That didn't work, so try an array of manifests.
var manifests []api.ContainerManifest
// TODO: should be api.Scheme.Decode
multiErr := yaml.Unmarshal(data, &manifests)
// We're not sure if the person reading the logs is going to care about the single or
// multiple manifest unmarshalling attempt, so we need to put both in the logs, as is
// done at the end. Hence not returning early here.
if multiErr == nil {
for _, manifest := range manifests {
if errs := validation.ValidateManifest(&manifest); len(errs) > 0 {
multiErr = fmt.Errorf("invalid manifest: %v", errs)
break
}
}
}
if multiErr == nil {
// A single manifest that did not pass semantic validation will yield an empty
// array of manifests (and no error) when unmarshaled as such. In that case,
// if the single manifest at least had a Version, we return the single-manifest
// error (if any).
if len(manifests) == 0 && len(manifest.Version) != 0 {
return singleErr
}
list := api.ContainerManifestList{Items: manifests}
boundPods := &api.BoundPods{}
if err := api.Scheme.Convert(&list, boundPods); err != nil {
return err
}
for i := range boundPods.Items {
pod := &boundPods.Items[i]
if len(pod.Name) == 0 {
pod.Name = fmt.Sprintf("%d", i+1)
}
if len(pod.Namespace) == 0 {
pod.Namespace = api.NamespaceDefault
}
}
s.updates <- kubelet.PodUpdate{boundPods.Items, kubelet.SET}
return nil
}
return fmt.Errorf("%v: received '%v', but couldn't parse as a "+
"single manifest (%v: %+v) or as multiple manifests (%v: %+v).\n",
s.url, string(data), singleErr, manifest, multiErr, manifests)
}