/
provisioner.go
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/
provisioner.go
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// Copyright 2017 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package caasoperatorprovisioner
import (
"fmt"
"github.com/juju/charm/v12"
"github.com/juju/errors"
"github.com/juju/loggo"
"github.com/juju/names/v5"
"github.com/juju/juju/apiserver/common"
charmscommon "github.com/juju/juju/apiserver/common/charms"
apiservererrors "github.com/juju/juju/apiserver/errors"
"github.com/juju/juju/apiserver/facade"
"github.com/juju/juju/caas/kubernetes/provider"
k8sconstants "github.com/juju/juju/caas/kubernetes/provider/constants"
"github.com/juju/juju/cloudconfig/podcfg"
"github.com/juju/juju/controller"
"github.com/juju/juju/docker"
"github.com/juju/juju/environs/config"
"github.com/juju/juju/environs/tags"
"github.com/juju/juju/pki"
"github.com/juju/juju/rpc/params"
"github.com/juju/juju/state/watcher"
"github.com/juju/juju/storage"
"github.com/juju/juju/storage/poolmanager"
)
var logger = loggo.GetLogger("juju.apiserver.caasoperatorprovisioner")
type APIGroup struct {
charmInfoAPI *charmscommon.CharmInfoAPI
appCharmInfoAPI *charmscommon.ApplicationCharmInfoAPI
*API
}
// CharmInfo returns information about the requested charm.
func (a *APIGroup) CharmInfo(args params.CharmURL) (params.Charm, error) {
return a.charmInfoAPI.CharmInfo(args)
}
// ApplicationCharmInfo returns information about an application's charm.
func (a *APIGroup) ApplicationCharmInfo(args params.Entity) (params.Charm, error) {
return a.appCharmInfoAPI.ApplicationCharmInfo(args)
}
// TODO (manadart 2020-10-21): Remove the ModelUUID method
// from the next version of this facade.
// API is CAAS operator provisioner API facade.
type API struct {
*common.PasswordChanger
*common.LifeGetter
*common.APIAddresser
auth facade.Authorizer
resources facade.Resources
ctrlState CAASControllerState
state CAASOperatorProvisionerState
storagePoolManager poolmanager.PoolManager
registry storage.ProviderRegistry
}
// NewCAASOperatorProvisionerAPI returns a new CAAS operator provisioner API facade.
func NewCAASOperatorProvisionerAPI(
resources facade.Resources,
authorizer facade.Authorizer,
ctrlSt CAASControllerState,
st CAASOperatorProvisionerState,
storagePoolManager poolmanager.PoolManager,
registry storage.ProviderRegistry,
) (*API, error) {
if !authorizer.AuthController() {
return nil, apiservererrors.ErrPerm
}
return &API{
PasswordChanger: common.NewPasswordChanger(st, common.AuthFuncForTagKind(names.ApplicationTagKind)),
LifeGetter: common.NewLifeGetter(st, common.AuthFuncForTagKind(names.ApplicationTagKind)),
APIAddresser: common.NewAPIAddresser(ctrlSt, resources),
auth: authorizer,
resources: resources,
ctrlState: ctrlSt,
state: st,
storagePoolManager: storagePoolManager,
registry: registry,
}, nil
}
// WatchApplications starts a StringsWatcher to watch applications
// deployed to this model.
func (a *API) WatchApplications() (params.StringsWatchResult, error) {
watch := a.state.WatchApplications()
// Consume the initial event and forward it to the result.
if changes, ok := <-watch.Changes(); ok {
return params.StringsWatchResult{
StringsWatcherId: a.resources.Register(watch),
Changes: changes,
}, nil
}
return params.StringsWatchResult{}, watcher.EnsureErr(watch)
}
// OperatorProvisioningInfo returns the info needed to provision an operator.
func (a *API) OperatorProvisioningInfo(args params.Entities) (params.OperatorProvisioningInfoResults, error) {
var result params.OperatorProvisioningInfoResults
cfg, err := a.ctrlState.ControllerConfig()
if err != nil {
return result, err
}
model, err := a.state.Model()
if err != nil {
return result, errors.Trace(err)
}
modelConfig, err := model.ModelConfig()
if err != nil {
return result, errors.Trace(err)
}
vers, ok := modelConfig.AgentVersion()
if !ok {
return result, errors.NewNotValid(nil,
fmt.Sprintf("agent version is missing in model config %q", modelConfig.Name()),
)
}
resourceTags := tags.ResourceTags(
names.NewModelTag(model.UUID()),
names.NewControllerTag(cfg.ControllerUUID()),
modelConfig,
)
imageRepo, err := docker.NewImageRepoDetails(cfg.CAASImageRepo())
if err != nil {
return result, errors.Annotatef(err, "parsing %s", controller.CAASImageRepo)
}
registryPath, err := podcfg.GetJujuOCIImagePath(cfg, vers)
if err != nil {
return result, errors.Trace(err)
}
imageInfo := params.NewDockerImageInfo(imageRepo, registryPath)
logger.Tracef("image info %v", imageInfo)
// PodSpec charms now use focal as the operator base until PodSpec is removed.
baseRegistryPath, err := podcfg.ImageForBase(imageRepo.Repository, charm.Base{
Name: "ubuntu",
Channel: charm.Channel{Track: "20.04", Risk: charm.Stable},
})
if err != nil {
return result, errors.Trace(err)
}
baseImageInfo := params.NewDockerImageInfo(imageRepo, baseRegistryPath)
logger.Tracef("base image info %v", baseImageInfo)
apiAddresses, err := a.APIAddresses()
if err == nil && apiAddresses.Error != nil {
err = apiAddresses.Error
}
if err != nil {
return result, errors.Annotatef(err, "getting api addresses")
}
oneProvisioningInfo := func(storageRequired bool) params.OperatorProvisioningInfo {
var charmStorageParams *params.KubernetesFilesystemParams
storageClassName, _ := modelConfig.AllAttrs()[k8sconstants.OperatorStorageKey].(string)
if storageRequired {
if storageClassName == "" {
return params.OperatorProvisioningInfo{
Error: apiservererrors.ServerError(errors.New("no operator storage defined")),
}
} else {
charmStorageParams, err = CharmStorageParams(cfg.ControllerUUID(), storageClassName, modelConfig, "", a.storagePoolManager, a.registry)
if err != nil {
return params.OperatorProvisioningInfo{
Error: apiservererrors.ServerError(errors.Annotatef(err, "getting operator storage parameters")),
}
}
charmStorageParams.Tags = resourceTags
}
}
return params.OperatorProvisioningInfo{
ImageDetails: imageInfo,
BaseImageDetails: baseImageInfo,
Version: vers,
APIAddresses: apiAddresses.Result,
CharmStorage: charmStorageParams,
Tags: resourceTags,
}
}
result.Results = make([]params.OperatorProvisioningInfo, len(args.Entities))
for i, entity := range args.Entities {
appName, err := names.ParseApplicationTag(entity.Tag)
if err != nil {
result.Results[i].Error = apiservererrors.ServerError(err)
continue
}
app, err := a.state.Application(appName.Id())
if err != nil {
result.Results[i].Error = apiservererrors.ServerError(err)
continue
}
ch, _, err := app.Charm()
if err != nil {
result.Results[i].Error = apiservererrors.ServerError(err)
continue
}
needStorage := provider.RequireOperatorStorage(ch)
logger.Debugf("application %s has min-juju-version=%v, so charm storage is %v",
appName.String(), ch.Meta().MinJujuVersion, needStorage)
result.Results[i] = oneProvisioningInfo(needStorage)
}
return result, nil
}
// IssueOperatorCertificate issues an x509 certificate for use by the specified application operator.
func (a *API) IssueOperatorCertificate(args params.Entities) (params.IssueOperatorCertificateResults, error) {
cfg, err := a.ctrlState.ControllerConfig()
if err != nil {
return params.IssueOperatorCertificateResults{}, errors.Trace(err)
}
caCert, _ := cfg.CACert()
si, err := a.ctrlState.StateServingInfo()
if err != nil {
return params.IssueOperatorCertificateResults{}, errors.Trace(err)
}
authority, err := pki.NewDefaultAuthorityPemCAKey([]byte(caCert),
[]byte(si.CAPrivateKey))
if err != nil {
return params.IssueOperatorCertificateResults{}, errors.Trace(err)
}
res := params.IssueOperatorCertificateResults{
Results: make([]params.IssueOperatorCertificateResult, len(args.Entities)),
}
for i, entity := range args.Entities {
appTag, err := names.ParseApplicationTag(entity.Tag)
if err != nil {
res.Results[i] = params.IssueOperatorCertificateResult{
Error: apiservererrors.ServerError(err),
}
continue
}
leaf, err := authority.LeafRequestForGroup(appTag.Name).
AddDNSNames(appTag.Name).
Commit()
if err != nil {
res.Results[i] = params.IssueOperatorCertificateResult{
Error: apiservererrors.ServerError(err),
}
continue
}
cert, privateKey, err := leaf.ToPemParts()
if err != nil {
res.Results[i] = params.IssueOperatorCertificateResult{
Error: apiservererrors.ServerError(err),
}
continue
}
res.Results[i] = params.IssueOperatorCertificateResult{
CACert: caCert,
Cert: string(cert),
PrivateKey: string(privateKey),
}
}
return res, nil
}
// ModelUUID returns the model UUID that this facade is used to operate.
// It is implemented here directly as a result of removing it from
// embedded APIAddresser *without* bumping the facade version.
// It should be blanked when this facade version is next incremented.
func (a *API) ModelUUID() params.StringResult {
m, err := a.state.Model()
if err != nil {
return params.StringResult{Error: apiservererrors.ServerError(err)}
}
return params.StringResult{Result: m.UUID()}
}
// CharmStorageParams returns filesystem parameters needed
// to provision storage used for a charm operator or workload.
func CharmStorageParams(
controllerUUID string,
storageClassName string,
modelCfg *config.Config,
poolName string,
poolManager poolmanager.PoolManager,
registry storage.ProviderRegistry,
) (*params.KubernetesFilesystemParams, error) {
// The defaults here are for operator storage.
// Workload storage will override these elsewhere.
var size uint64 = 1024
tags := tags.ResourceTags(
names.NewModelTag(modelCfg.UUID()),
names.NewControllerTag(controllerUUID),
modelCfg,
)
result := ¶ms.KubernetesFilesystemParams{
StorageName: "charm",
Size: size,
Provider: string(k8sconstants.StorageProviderType),
Tags: tags,
Attributes: make(map[string]interface{}),
}
// The storage key value from the model config might correspond
// to a storage pool, unless there's been a specific storage pool
// requested.
// First, blank out the fallback pool name used in previous
// versions of Juju.
if poolName == string(k8sconstants.StorageProviderType) {
poolName = ""
}
maybePoolName := poolName
if maybePoolName == "" {
maybePoolName = storageClassName
}
providerType, attrs, err := poolStorageProvider(poolManager, registry, maybePoolName)
if err != nil && (!errors.IsNotFound(err) || poolName != "") {
return nil, errors.Trace(err)
}
if err == nil {
result.Provider = string(providerType)
if len(attrs) > 0 {
result.Attributes = attrs
}
}
if _, ok := result.Attributes[k8sconstants.StorageClass]; !ok && result.Provider == string(k8sconstants.StorageProviderType) {
result.Attributes[k8sconstants.StorageClass] = storageClassName
}
return result, nil
}
func poolStorageProvider(poolManager poolmanager.PoolManager, registry storage.ProviderRegistry, poolName string) (storage.ProviderType, map[string]interface{}, error) {
pool, err := poolManager.Get(poolName)
if errors.IsNotFound(err) {
// If there's no pool called poolName, maybe a provider type
// has been specified directly.
providerType := storage.ProviderType(poolName)
provider, err1 := registry.StorageProvider(providerType)
if err1 != nil {
// The name can't be resolved as a storage provider type,
// so return the original "pool not found" error.
return "", nil, errors.Trace(err)
}
if !provider.Supports(storage.StorageKindFilesystem) {
return "", nil, errors.NotValidf("storage provider %q", providerType)
}
return providerType, nil, nil
} else if err != nil {
return "", nil, errors.Trace(err)
}
providerType := pool.Provider()
return providerType, pool.Attrs(), nil
}