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environ.go
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/
environ.go
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// Copyright 2013 Joyent Inc.
// Licensed under the AGPLv3, see LICENCE file for details.
package joyent
import (
"fmt"
"sync"
"github.com/juju/juju/constraints"
"github.com/juju/juju/environs"
"github.com/juju/juju/environs/config"
"github.com/juju/juju/environs/imagemetadata"
"github.com/juju/juju/environs/simplestreams"
"github.com/juju/juju/environs/storage"
"github.com/juju/juju/provider/common"
"github.com/juju/juju/state"
"github.com/juju/juju/state/api"
)
// This file contains the core of the Joyent Environ implementation.
type joyentEnviron struct {
common.SupportsUnitPlacementPolicy
name string
// supportedArchitectures caches the architectures
// for which images can be instantiated.
archLock sync.Mutex
supportedArchitectures []string
// All mutating operations should lock the mutex. Non-mutating operations
// should read all fields (other than name, which is immutable) from a
// shallow copy taken with getSnapshot().
// This advice is predicated on the goroutine-safety of the values of the
// affected fields.
lock sync.Mutex
ecfg *environConfig
storage storage.Storage
compute *joyentCompute
}
var _ environs.Environ = (*joyentEnviron)(nil)
var _ state.Prechecker = (*joyentEnviron)(nil)
// newEnviron create a new Joyent environ instance from config.
func newEnviron(cfg *config.Config) (*joyentEnviron, error) {
env := new(joyentEnviron)
if err := env.SetConfig(cfg); err != nil {
return nil, err
}
env.name = cfg.Name()
var err error
env.storage, err = newStorage(env.ecfg, "")
if err != nil {
return nil, err
}
env.compute, err = newCompute(env.ecfg)
if err != nil {
return nil, err
}
return env, nil
}
func (env *joyentEnviron) SetName(envName string) {
env.name = envName
}
func (env *joyentEnviron) Name() string {
return env.name
}
func (*joyentEnviron) Provider() environs.EnvironProvider {
return providerInstance
}
// PrecheckInstance is defined on the state.Prechecker interface.
func (env *joyentEnviron) PrecheckInstance(series string, cons constraints.Value, placement string) error {
if placement != "" {
return fmt.Errorf("unknown placement directive: %s", placement)
}
if !cons.HasInstanceType() {
return nil
}
// Constraint has an instance-type constraint so let's see if it is valid.
instanceTypes, err := env.listInstanceTypes()
if err != nil {
return err
}
for _, instanceType := range instanceTypes {
if instanceType.Name == *cons.InstanceType {
return nil
}
}
return fmt.Errorf("invalid Joyent instance %q specified", *cons.InstanceType)
}
// SupportedArchitectures is specified on the EnvironCapability interface.
func (env *joyentEnviron) SupportedArchitectures() ([]string, error) {
env.archLock.Lock()
defer env.archLock.Unlock()
if env.supportedArchitectures != nil {
return env.supportedArchitectures, nil
}
cfg := env.Ecfg()
// Create a filter to get all images from our region and for the correct stream.
cloudSpec := simplestreams.CloudSpec{
Region: cfg.Region(),
Endpoint: cfg.SdcUrl(),
}
imageConstraint := imagemetadata.NewImageConstraint(simplestreams.LookupParams{
CloudSpec: cloudSpec,
Stream: cfg.ImageStream(),
})
var err error
env.supportedArchitectures, err = common.SupportedArchitectures(env, imageConstraint)
return env.supportedArchitectures, err
}
// SupportNetworks is specified on the EnvironCapability interface.
func (e *joyentEnviron) SupportNetworks() bool {
return false
}
func (env *joyentEnviron) SetConfig(cfg *config.Config) error {
env.lock.Lock()
defer env.lock.Unlock()
ecfg, err := providerInstance.newConfig(cfg)
if err != nil {
return err
}
env.ecfg = ecfg
return nil
}
func (env *joyentEnviron) getSnapshot() *joyentEnviron {
env.lock.Lock()
clone := *env
env.lock.Unlock()
clone.lock = sync.Mutex{}
return &clone
}
func (env *joyentEnviron) Config() *config.Config {
return env.getSnapshot().ecfg.Config
}
func (env *joyentEnviron) Storage() storage.Storage {
return env.getSnapshot().storage
}
func (env *joyentEnviron) Bootstrap(ctx environs.BootstrapContext, args environs.BootstrapParams) error {
return common.Bootstrap(ctx, env, args)
}
func (env *joyentEnviron) StateInfo() (*state.Info, *api.Info, error) {
return common.StateInfo(env)
}
func (env *joyentEnviron) Destroy() error {
return common.Destroy(env)
}
func (env *joyentEnviron) Ecfg() *environConfig {
return env.getSnapshot().ecfg
}
// MetadataLookupParams returns parameters which are used to query simplestreams metadata.
func (env *joyentEnviron) MetadataLookupParams(region string) (*simplestreams.MetadataLookupParams, error) {
if region == "" {
region = env.Ecfg().Region()
}
return &simplestreams.MetadataLookupParams{
Series: config.PreferredSeries(env.Ecfg()),
Region: region,
Endpoint: env.Ecfg().sdcUrl(),
Architectures: []string{"amd64", "armhf"},
}, nil
}
// Region is specified in the HasRegion interface.
func (env *joyentEnviron) Region() (simplestreams.CloudSpec, error) {
return simplestreams.CloudSpec{
Region: env.Ecfg().Region(),
Endpoint: env.Ecfg().sdcUrl(),
}, nil
}
// GetImageSources returns a list of sources which are used to search for simplestreams image metadata.
func (env *joyentEnviron) GetImageSources() ([]simplestreams.DataSource, error) {
// Add the simplestreams source off the control bucket.
sources := []simplestreams.DataSource{
storage.NewStorageSimpleStreamsDataSource("cloud storage", env.Storage(), storage.BaseImagesPath)}
return sources, nil
}
// GetToolsSources returns a list of sources which are used to search for simplestreams tools metadata.
func (env *joyentEnviron) GetToolsSources() ([]simplestreams.DataSource, error) {
// Add the simplestreams source off the control bucket.
sources := []simplestreams.DataSource{
storage.NewStorageSimpleStreamsDataSource("cloud storage", env.Storage(), storage.BaseToolsPath)}
return sources, nil
}