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Merge pull request #1898 from jhadvig/podex_images

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Podex handling multiple images
This commit is contained in:
Johan Euphrosine 2014-10-21 17:44:39 -07:00
commit 0e8804ee49
1 changed files with 51 additions and 34 deletions
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85
contrib/podex/podex.go
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@ -40,10 +40,11 @@ import (
"gopkg.in/v1/yaml"
)
const usage = "usage: podex [-json|-yaml] <repo/dockerimage>"
const usage = "usage: podex [-json|-yaml] -id=ID username/image1 ... username/imageN"
var generateJSON = flag.Bool("json", false, "generate json manifest")
var generateYAML = flag.Bool("yaml", false, "generate yaml manifest")
var podName = flag.String("id", "", "set pod name")
func main() {
flag.Parse()
@ -51,60 +52,64 @@ func main() {
if flag.NArg() < 1 {
log.Fatal(usage)
}
imageName := flag.Arg(0)
if len(imageName) == 0 {
log.Fatal(usage)
if *podName == "" {
if flag.NArg() > 1 {
log.Fatal(usage)
}
_, *podName = parseDockerImage(flag.Arg(0))
}
if (!*generateJSON && !*generateYAML) || (*generateJSON && *generateYAML) {
log.Fatal(usage)
}
// Parse docker image name
// IMAGE: [REGISTRYHOST/][USERNAME/]NAME[:TAG]
// NAME: [a-z0-9-_.]
parts := strings.Split(imageName, "/")
baseName := parts[len(parts)-1]
dockerHost := os.Getenv("DOCKER_HOST")
if dockerHost == "" {
log.Fatalf("DOCKER_HOST is not set")
}
docker, err := dockerclient.NewClient(dockerHost)
if err != nil {
log.Fatalf("failed to connect to %q: %v", dockerHost, err)
}
// TODO(proppy): use the regitry API instead of the remote API to get image metadata.
img, err := docker.InspectImage(imageName)
if err != nil {
log.Fatalf("failed to inspect image %q: %v", imageName, err)
}
// TODO(proppy): add flag to handle multiple version
manifest := v1beta1.ContainerManifest{
Version: "v1beta1",
ID: baseName + "-pod",
Containers: []v1beta1.Container{{
podContainers := []v1beta1.Container{}
for _, imageName := range flag.Args() {
parts, baseName := parseDockerImage(imageName)
container := v1beta1.Container{
Name: baseName,
Image: imageName,
}},
}
// TODO(proppy): use the regitry API instead of the remote API to get image metadata.
img, err := docker.InspectImage(imageName)
if err != nil {
log.Fatalf("failed to inspect image %q: %v", imageName, err)
}
for p := range img.Config.ExposedPorts {
port, err := strconv.Atoi(p.Port())
if err != nil {
log.Fatalf("failed to parse port %q: %v", parts[0], err)
}
container.Ports = append(container.Ports, v1beta1.Port{
Name: strings.Join([]string{baseName, p.Proto(), p.Port()}, "-"),
ContainerPort: port,
Protocol: v1beta1.Protocol(strings.ToUpper(p.Proto())),
})
}
podContainers = append(podContainers, container)
}
// TODO(proppy): add flag to handle multiple version
manifest := v1beta1.ContainerManifest{
Version: "v1beta1",
ID: *podName + "-pod",
Containers: podContainers,
RestartPolicy: v1beta1.RestartPolicy{
Always: &v1beta1.RestartPolicyAlways{},
},
}
for p := range img.Config.ExposedPorts {
port, err := strconv.Atoi(p.Port())
if err != nil {
log.Fatalf("failed to parse port %q: %v", parts[0], err)
}
manifest.Containers[0].Ports = append(manifest.Containers[0].Ports, v1beta1.Port{
Name: strings.Join([]string{baseName, p.Proto(), p.Port()}, "-"),
ContainerPort: port,
Protocol: v1beta1.Protocol(strings.ToUpper(p.Proto())),
})
}
if *generateJSON {
bs, err := json.MarshalIndent(manifest, "", " ")
if err != nil {
@ -120,3 +125,15 @@ func main() {
os.Stdout.Write(bs)
}
}
// parseDockerImage split a docker image name of the form [REGISTRYHOST/][USERNAME/]NAME[:TAG]
// TODO: handle the TAG
// Returns array of images name parts and base image name
func parseDockerImage(imageName string) (parts []string, baseName string) {
// Parse docker image name
// IMAGE: [REGISTRYHOST/][USERNAME/]NAME[:TAG]
// NAME: [a-z0-9-_.]
parts = strings.Split(imageName, "/")
baseName = parts[len(parts)-1]
return
}