mirror of
https://github.com/containrrr/watchtower.git
synced 2024-12-15 09:14:13 +02:00
111 lines
3.2 KiB
Go
111 lines
3.2 KiB
Go
package container
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import (
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"errors"
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"os"
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"strings"
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log "github.com/sirupsen/logrus"
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"github.com/docker/docker/api/types"
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"github.com/docker/docker/api/types/reference"
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"github.com/docker/docker/cli/command"
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"github.com/docker/docker/cliconfig"
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"github.com/docker/docker/cliconfig/configfile"
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"github.com/docker/docker/cliconfig/credentials"
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)
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/**
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* Return an encoded auth config for the given registry
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* loaded from environment variables or docker config
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* as available in that order
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*/
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func EncodedAuth(ref string) (string, error) {
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auth, err := EncodedEnvAuth(ref)
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if err != nil {
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auth, err = EncodedConfigAuth(ref)
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}
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return auth, err
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}
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/*
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* Return an encoded auth config for the given registry
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* loaded from environment variables
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* Returns an error if authentication environment variables have not been set
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*/
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func EncodedEnvAuth(ref string) (string, error) {
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username := os.Getenv("REPO_USER")
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password := os.Getenv("REPO_PASS")
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if username != "" && password != "" {
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auth := types.AuthConfig{
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Username: username,
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Password: password,
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}
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log.Debugf("Loaded auth credentials %s for %s", auth, ref)
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return EncodeAuth(auth)
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} else {
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return "", errors.New("Registry auth environment variables (REPO_USER, REPO_PASS) not set")
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}
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}
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/*
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* Return an encoded auth config for the given registry
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* loaded from the docker config
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* Returns an empty string if credentials cannot be found for the referenced server
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* The docker config must be mounted on the container
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*/
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func EncodedConfigAuth(ref string) (string, error) {
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server, err := ParseServerAddress(ref)
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configDir := os.Getenv("DOCKER_CONFIG")
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if configDir == "" {
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configDir = "/"
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}
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configFile, err := cliconfig.Load(configDir)
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if err != nil {
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log.Errorf("Unable to find default config file %s", err)
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return "", err
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}
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credStore := CredentialsStore(*configFile)
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auth, err := credStore.Get(server) // returns (types.AuthConfig{}) if server not in credStore
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if auth == (types.AuthConfig{}) {
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log.Debugf("No credentials for %s in %s", server, configFile.Filename)
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return "", nil
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}
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log.Debugf("Loaded auth credentials %s from %s", auth, configFile.Filename)
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return EncodeAuth(auth)
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}
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func ParseServerAddress(ref string) (string, error) {
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repository, _, err := reference.Parse(ref)
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if err != nil {
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return ref, err
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}
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parts := strings.Split(repository, "/")
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return parts[0], nil
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}
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// CredentialsStore returns a new credentials store based
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// on the settings provided in the configuration file.
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func CredentialsStore(configFile configfile.ConfigFile) credentials.Store {
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if configFile.CredentialsStore != "" {
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return credentials.NewNativeStore(&configFile, configFile.CredentialsStore)
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}
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return credentials.NewFileStore(&configFile)
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}
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/*
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* Base64 encode an AuthConfig struct for transmission over HTTP
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*/
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func EncodeAuth(auth types.AuthConfig) (string, error) {
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return command.EncodeAuthToBase64(auth)
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}
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/**
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* This function will be invoked if an AuthConfig is rejected
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* It could be used to return a new value for the "X-Registry-Auth" authentication header,
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* but there's no point trying again with the same value as used in AuthConfig
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*/
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func DefaultAuthHandler() (string, error) {
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log.Debug("Authentication request was rejected. Trying again without authentication")
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return "", nil
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}
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