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podex: add daemon mode

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This commit is contained in:
Johan Euphrosine 2015-02-26 12:17:45 -08:00
parent aef560a01a
commit bdaaa0f143
1 changed files with 48 additions and 30 deletions
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78
contrib/podex/podex.go
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@ -48,6 +48,7 @@ const usage = "podex [-format=yaml|json] [-type=pod|container] [-id NAME] IMAGES
var flManifestFormat = flag.String("format", "yaml", "manifest format to output, `yaml` or `json`")
var flManifestType = flag.String("type", "pod", "manifest type to output, `pod` or `container`")
var flManifestName = flag.String("name", "", "manifest name, default to image base name")
var flDaemon = flag.Bool("daemon", false, "daemon mode")
func init() {
flag.Usage = func() {
@ -63,6 +64,53 @@ type image struct {
Tag string
}
func main() {
flag.Parse()
if *flDaemon {
http.HandleFunc("/pods/", func(w http.ResponseWriter, r *http.Request) {
image := strings.TrimPrefix(r.URL.Path, "/pods/")
_, _, manifestName, _ := splitDockerImageName(image)
manifest, err := getManifest(manifestName, "pod", "json", image)
if err != nil {
errMessage := fmt.Sprintf("failed to generate pod manifest for image %q: %v", image, err)
log.Print(errMessage)
http.Error(w, errMessage, http.StatusInternalServerError)
return
}
io.Copy(w, manifest)
})
log.Fatal(http.ListenAndServe(":8080", nil))
}
if flag.NArg() < 1 {
flag.Usage()
log.Fatal("pod: missing image argument")
}
if *flManifestName == "" {
if flag.NArg() > 1 {
flag.Usage()
log.Fatal("podex: -id arg is required when passing more than one image")
}
_, _, *flManifestName, _ = splitDockerImageName(flag.Arg(0))
}
if *flManifestType != "pod" && *flManifestType != "container" {
flag.Usage()
log.Fatalf("unsupported manifest type %q", *flManifestType)
}
if *flManifestFormat != "yaml" && *flManifestFormat != "json" {
flag.Usage()
log.Fatalf("unsupported manifest format %q", *flManifestFormat)
}
manifest, err := getManifest(*flManifestName, *flManifestType, *flManifestFormat, flag.Args()...)
if err != nil {
log.Fatalf("failed to generate %q manifest for %v: %v", *flManifestType, flag.Args(), err)
}
io.Copy(os.Stdout, manifest)
}
// getManifest infers a pod (or container) manifest for a list of docker images.
func getManifest(manifestName, manifestType, manifestFormat string, images ...string) (io.Reader, error) {
podContainers := []goyaml.MapSlice{}
@ -154,36 +202,6 @@ func getManifest(manifestName, manifestType, manifestFormat string, images ...st
}
func main() {
flag.Parse()
if flag.NArg() < 1 {
flag.Usage()
log.Fatal("pod: missing image argument")
}
if *flManifestName == "" {
if flag.NArg() > 1 {
flag.Usage()
log.Fatal("podex: -id arg is required when passing more than one image")
}
_, _, *flManifestName, _ = splitDockerImageName(flag.Arg(0))
}
if *flManifestType != "pod" && *flManifestType != "container" {
flag.Usage()
log.Fatalf("unsupported manifest type %q", *flManifestType)
}
if *flManifestFormat != "yaml" && *flManifestFormat != "json" {
flag.Usage()
log.Fatalf("unsupported manifest format %q", *flManifestFormat)
}
manifest, err := getManifest(*flManifestName, *flManifestType, *flManifestFormat, flag.Args()...)
if err != nil {
log.Fatalf("failed to generate %q manifest for %v: %v", *flManifestType, flag.Args(), err)
}
io.Copy(os.Stdout, manifest)
}
// splitDockerImageName split a docker image name of the form [HOST/][NAMESPACE/]REPOSITORY[:TAG]
func splitDockerImageName(imageName string) (host, namespace, repo, tag string) {
hostNamespaceImage := strings.Split(imageName, "/")