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podex: initial import #1537
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podex: initial import #1537
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b6a9734
podex: initial import
proppy 0d9119b
podex: add google/nodejs-hello yaml manifest
proppy 159035f
podex: add missing license header and examples
proppy 9fa593f
podex: add manifests subdirectory
proppy 68ce589
podex/nodejs-hello: remove generated restart policy
proppy 1b2604f
podex/nodejs-hello: add hostPort
proppy e5b3e41
podex: move to contrib
proppy 4102e0d
podex: fix build and reject conflicting options
proppy 02b12af
podex: fix filename typo
proppy dd571c5
podex: add TODO
proppy 5aefc25
podex: add comment about image name parsing
proppy dbbe561
podex: gofmt -s
proppy ba9519f
podex: cleanup maintainers
proppy c0a2949
podex: fix typo
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# Maintainers | ||
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Johan Euphrosine <proppy@google.com> |
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# podex | ||
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## Description | ||
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`podex` is a command line tool to bootstrap a kubernetes container manifests from docker image metadata. | ||
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Manifests can then be edited by a human to match deployment needs. | ||
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## Usage | ||
``` | ||
$ docker pull google/nodejs-hello | ||
$ podex -yaml google/nodejs-hello > pod.yaml | ||
$ podex -json google/nodejs-hello > pod.json | ||
``` |
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/* | ||
Copyright 2014 Google Inc. All rights reserved. | ||
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Licensed under the Apache License, Version 2.0 (the "License"); | ||
you may not use this file except in compliance with the License. | ||
You may obtain a copy of the License at | ||
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http://www.apache.org/licenses/LICENSE-2.0 | ||
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Unless required by applicable law or agreed to in writing, software | ||
distributed under the License is distributed on an "AS IS" BASIS, | ||
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
See the License for the specific language governing permissions and | ||
limitations under the License. | ||
*/ | ||
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// podex is a command line tool to bootstrap kubernetes container | ||
// manifest from docker image metadata. | ||
// | ||
// Manifests can then be edited by a human to match deployment needs. | ||
// | ||
// Example usage: | ||
// | ||
// $ docker pull google/nodejs-hello | ||
// $ podex -yaml google/nodejs-hello > google/nodejs-hello/pod.yaml | ||
// $ podex -json google/nodejs-hello > google/nodejs-hello/pod.json | ||
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package main | ||
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import ( | ||
"encoding/json" | ||
"flag" | ||
"log" | ||
"os" | ||
"strconv" | ||
"strings" | ||
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"github.com/GoogleCloudPlatform/kubernetes/pkg/api/v1beta1" | ||
dockerclient "github.com/fsouza/go-dockerclient" | ||
"gopkg.in/v1/yaml" | ||
) | ||
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const usage = "usage: podex [-json|-yaml] <repo/dockerimage>" | ||
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var generateJSON = flag.Bool("json", false, "generate json manifest") | ||
var generateYAML = flag.Bool("yaml", false, "generate yaml manifest") | ||
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func main() { | ||
flag.Parse() | ||
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if flag.NArg() < 1 { | ||
log.Fatal(usage) | ||
} | ||
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imageName := flag.Arg(0) | ||
if len(imageName) == 0 { | ||
log.Fatal(usage) | ||
} | ||
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if (!*generateJSON && !*generateYAML) || (*generateJSON && *generateYAML) { | ||
log.Fatal(usage) | ||
} | ||
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// Parse docker image name | ||
// IMAGE: [REGISTRYHOST/][USERNAME/]NAME[:TAG] | ||
// NAME: [a-z0-9-_.] | ||
parts := strings.Split(imageName, "/") | ||
baseName := parts[len(parts)-1] | ||
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dockerHost := os.Getenv("DOCKER_HOST") | ||
docker, err := dockerclient.NewClient(dockerHost) | ||
if err != nil { | ||
log.Fatalf("failed to connect to %q: %v", dockerHost, err) | ||
} | ||
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// 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{{ | ||
Name: baseName, | ||
Image: imageName, | ||
}}, | ||
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: strings.ToUpper(p.Proto()), | ||
}) | ||
} | ||
if *generateJSON { | ||
bs, err := json.MarshalIndent(manifest, "", " ") | ||
if err != nil { | ||
log.Fatalf("failed to render JSON container manifest: %v", err) | ||
} | ||
os.Stdout.Write(bs) | ||
} | ||
if *generateYAML { | ||
bs, err := yaml.Marshal(manifest) | ||
if err != nil { | ||
log.Fatalf("failed to render YAML container manifest: %v", err) | ||
} | ||
os.Stdout.Write(bs) | ||
} | ||
} |
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s/manifests/manifest
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Done.