forked from juju/juju
/
machinemanager.go
259 lines (236 loc) · 7.35 KB
/
machinemanager.go
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// Copyright 2015 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.
package machinemanager
import (
"fmt"
"github.com/juju/errors"
"github.com/juju/utils/set"
"gopkg.in/juju/names.v2"
"github.com/juju/juju/apiserver/common"
"github.com/juju/juju/apiserver/facade"
"github.com/juju/juju/apiserver/params"
"github.com/juju/juju/environs/config"
"github.com/juju/juju/instance"
"github.com/juju/juju/permission"
"github.com/juju/juju/state"
)
func init() {
common.RegisterStandardFacade("MachineManager", 2, NewMachineManagerAPI)
// Version 3 adds DestroyMachine and ForceDestroyMachine.
common.RegisterStandardFacade("MachineManager", 3, NewMachineManagerAPI)
}
// MachineManagerAPI provides access to the MachineManager API facade.
type MachineManagerAPI struct {
st stateInterface
authorizer facade.Authorizer
check *common.BlockChecker
}
var getState = func(st *state.State) stateInterface {
return stateShim{st}
}
// NewMachineManagerAPI creates a new server-side MachineManager API facade.
func NewMachineManagerAPI(
st *state.State,
resources facade.Resources,
authorizer facade.Authorizer,
) (*MachineManagerAPI, error) {
if !authorizer.AuthClient() {
return nil, common.ErrPerm
}
s := getState(st)
return &MachineManagerAPI{
st: s,
authorizer: authorizer,
check: common.NewBlockChecker(s),
}, nil
}
func (mm *MachineManagerAPI) checkCanWrite() error {
canWrite, err := mm.authorizer.HasPermission(permission.WriteAccess, mm.st.ModelTag())
if err != nil {
return errors.Trace(err)
}
if !canWrite {
return common.ErrPerm
}
return nil
}
// AddMachines adds new machines with the supplied parameters.
func (mm *MachineManagerAPI) AddMachines(args params.AddMachines) (params.AddMachinesResults, error) {
results := params.AddMachinesResults{
Machines: make([]params.AddMachinesResult, len(args.MachineParams)),
}
if err := mm.checkCanWrite(); err != nil {
return results, err
}
if err := mm.check.ChangeAllowed(); err != nil {
return results, errors.Trace(err)
}
for i, p := range args.MachineParams {
m, err := mm.addOneMachine(p)
results.Machines[i].Error = common.ServerError(err)
if err == nil {
results.Machines[i].Machine = m.Id()
}
}
return results, nil
}
func (mm *MachineManagerAPI) addOneMachine(p params.AddMachineParams) (*state.Machine, error) {
if p.ParentId != "" && p.ContainerType == "" {
return nil, fmt.Errorf("parent machine specified without container type")
}
if p.ContainerType != "" && p.Placement != nil {
return nil, fmt.Errorf("container type and placement are mutually exclusive")
}
if p.Placement != nil {
// Extract container type and parent from container placement directives.
containerType, err := instance.ParseContainerType(p.Placement.Scope)
if err == nil {
p.ContainerType = containerType
p.ParentId = p.Placement.Directive
p.Placement = nil
}
}
if p.ContainerType != "" || p.Placement != nil {
// Guard against dubious client by making sure that
// the following attributes can only be set when we're
// not using placement.
p.InstanceId = ""
p.Nonce = ""
p.HardwareCharacteristics = instance.HardwareCharacteristics{}
p.Addrs = nil
}
if p.Series == "" {
conf, err := mm.st.ModelConfig()
if err != nil {
return nil, errors.Trace(err)
}
p.Series = config.PreferredSeries(conf)
}
var placementDirective string
if p.Placement != nil {
env, err := mm.st.Model()
if err != nil {
return nil, errors.Trace(err)
}
// For 1.21 we should support both UUID and name, and with 1.22
// just support UUID
if p.Placement.Scope != env.Name() && p.Placement.Scope != env.UUID() {
return nil, fmt.Errorf("invalid model name %q", p.Placement.Scope)
}
placementDirective = p.Placement.Directive
}
volumes := make([]state.MachineVolumeParams, 0, len(p.Disks))
for _, cons := range p.Disks {
if cons.Count == 0 {
return nil, errors.Errorf("invalid volume params: count not specified")
}
// Pool and Size are validated by AddMachineX.
volumeParams := state.VolumeParams{
Pool: cons.Pool,
Size: cons.Size,
}
volumeAttachmentParams := state.VolumeAttachmentParams{}
for i := uint64(0); i < cons.Count; i++ {
volumes = append(volumes, state.MachineVolumeParams{
volumeParams, volumeAttachmentParams,
})
}
}
jobs, err := common.StateJobs(p.Jobs)
if err != nil {
return nil, errors.Trace(err)
}
template := state.MachineTemplate{
Series: p.Series,
Constraints: p.Constraints,
Volumes: volumes,
InstanceId: p.InstanceId,
Jobs: jobs,
Nonce: p.Nonce,
HardwareCharacteristics: p.HardwareCharacteristics,
Addresses: params.NetworkAddresses(p.Addrs...),
Placement: placementDirective,
}
if p.ContainerType == "" {
return mm.st.AddOneMachine(template)
}
if p.ParentId != "" {
return mm.st.AddMachineInsideMachine(template, p.ParentId, p.ContainerType)
}
return mm.st.AddMachineInsideNewMachine(template, template, p.ContainerType)
}
// DestroyMachine removes a set of machines from the model.
func (mm *MachineManagerAPI) DestroyMachine(args params.Entities) (params.DestroyMachineResults, error) {
return mm.destroyMachine(args, false)
}
// ForceDestroyMachine forcibly removes a set of machines from the model.
func (mm *MachineManagerAPI) ForceDestroyMachine(args params.Entities) (params.DestroyMachineResults, error) {
return mm.destroyMachine(args, true)
}
func (mm *MachineManagerAPI) destroyMachine(args params.Entities, force bool) (params.DestroyMachineResults, error) {
if err := mm.checkCanWrite(); err != nil {
return params.DestroyMachineResults{}, err
}
if err := mm.check.RemoveAllowed(); err != nil {
return params.DestroyMachineResults{}, err
}
destroyMachine := func(entity params.Entity) (*params.DestroyMachineInfo, error) {
machineTag, err := names.ParseMachineTag(entity.Tag)
if err != nil {
return nil, err
}
machine, err := mm.st.Machine(machineTag.Id())
if err != nil {
return nil, err
}
var info params.DestroyMachineInfo
units, err := machine.Units()
if err != nil {
return nil, err
}
storageSeen := make(set.Tags)
for _, unit := range units {
info.DestroyedUnits = append(
info.DestroyedUnits,
params.Entity{unit.UnitTag().String()},
)
storage, err := common.UnitStorage(mm.st, unit.UnitTag())
if err != nil {
return nil, err
}
// Filter out storage we've already seen. Shared
// storage may be attached to multiple units.
var unseen []state.StorageInstance
for _, storage := range storage {
storageTag := storage.StorageTag()
if storageSeen.Contains(storageTag) {
continue
}
storageSeen.Add(storageTag)
unseen = append(unseen, storage)
}
storage = unseen
destroyed, detached := common.ClassifyDetachedStorage(storage)
info.DestroyedStorage = append(info.DestroyedStorage, destroyed...)
info.DetachedStorage = append(info.DetachedStorage, detached...)
}
destroy := machine.Destroy
if force {
destroy = machine.ForceDestroy
}
if err := destroy(); err != nil {
return nil, err
}
return &info, nil
}
results := make([]params.DestroyMachineResult, len(args.Entities))
for i, entity := range args.Entities {
info, err := destroyMachine(entity)
if err != nil {
results[i].Error = common.ServerError(err)
continue
}
results[i].Info = info
}
return params.DestroyMachineResults{results}, nil
}