forked from LaconicNetwork/kompose
96 lines
3.6 KiB
Go
96 lines
3.6 KiB
Go
/*
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Copyright 2016 The Kubernetes Authors All rights reserved
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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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
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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package docker
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import (
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"bytes"
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dockerlib "github.com/fsouza/go-dockerclient"
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"github.com/pkg/errors"
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log "github.com/sirupsen/logrus"
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)
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// Push will provide methods for interaction with API regarding pushing images
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type Push struct {
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Client dockerlib.Client
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}
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/*
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PushImage pushes a Docker image via the Docker API. Takes the image name,
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parses the URL details and then push based on environment authentication
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credentials.
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*/
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func (c *Push) PushImage(image Image) error {
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log.Infof("Pushing image '%s' to registry '%s'", image.Name, image.Registry)
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// Let's setup the push and authentication options
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outputBuffer := bytes.NewBuffer(nil)
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options := dockerlib.PushImageOptions{
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Tag: image.Tag,
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Name: image.Repository,
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Registry: image.Registry,
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OutputStream: outputBuffer,
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}
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// Retrieve the authentication configuration file
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// Files checked as per https://godoc.org/github.com/fsouza/go-dockerclient#NewAuthConfigurationsFromFile
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// $DOCKER_CONFIG/config.json, $HOME/.docker/config.json , $HOME/.dockercfg
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credentials, err := dockerlib.NewAuthConfigurationsFromDockerCfg()
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if err != nil {
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log.Warn(errors.Wrap(err, "Unable to retrieve .docker/config.json authentication details. Check that 'docker login' works successfully on the command line."))
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} else {
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handleDockerRegistry(credentials)
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}
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// Find the authentication matched to registry
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auth, ok := credentials.Configs[image.Registry]
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if !ok {
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// Fallback to unauthenticated access in case if no auth credentials are retrieved
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log.Infof("Authentication credential of registry '%s' is not found. Will try push without authentication.", image.Registry)
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// Header X-Registry-Auth is required
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// Or API error (400): Bad parameters and missing X-Registry-Auth: EOF will throw
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// Just to make not empty struct
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auth = dockerlib.AuthConfiguration{Username: "docker"}
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}
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log.Debugf("Pushing image with options %+v", options)
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err = c.Client.PushImage(options, auth)
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if err != nil {
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log.Errorf("Unable to push image '%s' to registry '%s'. Error: %s", image.Name, image.Registry, err)
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return errors.New("unable to push docker image(s). Check that `docker login` works successfully on the command line")
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}
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log.Debugf("Image '%+v' push output:\n%s", image, outputBuffer)
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log.Infof("Successfully pushed image '%s' to registry '%s'", image.Name, image.Registry)
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return nil
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}
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// handleDockerRegistry adapt legacy docker registry address
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// After docker login to docker.io, there must be https://index.docker.io/v1/ in config.json of authentication
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// Reference: https://docs.docker.com/engine/api/v1.23/
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// > However (for legacy reasons) the “official” Docker, Inc. hosted registry
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// > must be specified with both a “https://” prefix and a “/v1/” suffix
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// > even though Docker will prefer to use the v2 registry API.
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func handleDockerRegistry(auth *dockerlib.AuthConfigurations) {
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const address = "docker.io"
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const legacyAddress = "https://index.docker.io/v1/"
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if legacyAddressConfig, ok := auth.Configs[legacyAddress]; ok {
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auth.Configs[address] = legacyAddressConfig
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}
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}
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