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provider.go
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provider.go
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// Copyright 2013 Joyent Inc.
// Licensed under the AGPLv3, see LICENCE file for details.
package joyent
import (
"errors"
"fmt"
"github.com/joyent/gosign/auth"
"github.com/juju/loggo"
"github.com/juju/juju/environs"
"github.com/juju/juju/environs/config"
"github.com/juju/juju/environs/imagemetadata"
"github.com/juju/juju/environs/simplestreams"
envtools "github.com/juju/juju/environs/tools"
)
var logger = loggo.GetLogger("juju.provider.joyent")
type joyentProvider struct{}
var providerInstance = joyentProvider{}
var _ environs.EnvironProvider = providerInstance
var _ simplestreams.HasRegion = (*joyentEnviron)(nil)
var _ imagemetadata.SupportsCustomSources = (*joyentEnviron)(nil)
var _ envtools.SupportsCustomSources = (*joyentEnviron)(nil)
func init() {
environs.RegisterProvider("joyent", providerInstance)
}
var errNotImplemented = errors.New("not implemented in Joyent provider")
func (joyentProvider) Prepare(ctx environs.BootstrapContext, cfg *config.Config) (environs.Environ, error) {
preparedCfg, err := prepareConfig(cfg)
if err != nil {
return nil, err
}
return providerInstance.Open(preparedCfg)
}
func credentials(cfg *environConfig) (*auth.Credentials, error) {
authentication, err := auth.NewAuth(cfg.mantaUser(), cfg.privateKey(), cfg.algorithm())
if err != nil {
return nil, fmt.Errorf("cannot create credentials: %v", err)
}
return &auth.Credentials{
UserAuthentication: authentication,
MantaKeyId: cfg.mantaKeyId(),
MantaEndpoint: auth.Endpoint{URL: cfg.mantaUrl()},
SdcKeyId: cfg.sdcKeyId(),
SdcEndpoint: auth.Endpoint{URL: cfg.sdcUrl()},
}, nil
}
func (joyentProvider) Open(cfg *config.Config) (environs.Environ, error) {
env, err := newEnviron(cfg)
if err != nil {
return nil, err
}
return env, nil
}
func (joyentProvider) Validate(cfg, old *config.Config) (valid *config.Config, err error) {
newEcfg, err := validateConfig(cfg, old)
if err != nil {
return nil, fmt.Errorf("invalid Joyent provider config: %v", err)
}
return cfg.Apply(newEcfg.attrs)
}
func (joyentProvider) SecretAttrs(cfg *config.Config) (map[string]string, error) {
// If you keep configSecretFields up to date, this method should Just Work.
ecfg, err := validateConfig(cfg, nil)
if err != nil {
return nil, err
}
secretAttrs := map[string]string{}
for _, field := range configSecretFields {
if value, ok := ecfg.attrs[field]; ok {
if stringValue, ok := value.(string); ok {
secretAttrs[field] = stringValue
} else {
// All your secret attributes must be strings at the moment. Sorry.
// It's an expedient and hopefully temporary measure that helps us
// plug a security hole in the API.
return nil, fmt.Errorf(
"secret %q field must have a string value; got %v",
field, value,
)
}
}
}
return secretAttrs, nil
}
func (joyentProvider) BoilerplateConfig() string {
return boilerplateConfig
}
func GetProviderInstance() environs.EnvironProvider {
return providerInstance
}
// MetadataLookupParams returns parameters which are used to query image metadata to
// find matching image information.
func (p joyentProvider) MetadataLookupParams(region string) (*simplestreams.MetadataLookupParams, error) {
if region == "" {
return nil, fmt.Errorf("region must be specified")
}
return &simplestreams.MetadataLookupParams{
Region: region,
Architectures: []string{"amd64", "armhf"},
}, nil
}
func (p joyentProvider) newConfig(cfg *config.Config) (*environConfig, error) {
valid, err := p.Validate(cfg, nil)
if err != nil {
return nil, err
}
return &environConfig{valid, valid.UnknownAttrs()}, nil
}