func (bs *BaseStack) apply(ctx context.Context, req *stack.ApplyRequest) error {
log := bs.Log.New(req.StackID)
bs.Eventer.Push(&eventer.Event{
Message: bs.Req.Method + " started",
Status: machinestate.Building,
})
go func() {
finalEvent := &eventer.Event{
Message: bs.Req.Method + " finished",
Status: machinestate.Running,
Percentage: 100,
}
start := time.Now()
modelhelper.SetStackState(req.StackID, "Stack building started", stackstate.Building)
log.Info("======> %s started <======", strings.ToUpper(bs.Req.Method))
if err := bs.applyAsync(ctx, req); err != nil {
modelhelper.SetStackState(req.StackID, "Stack building failed", stackstate.NotInitialized)
finalEvent.Status = machinestate.NotInitialized
// don't pass the error directly to the eventer, mask it to avoid
// error leaking to the client. We just log it here.
finalEvent.Error = err.Error()
log.Error("======> %s finished with error (time: %s): '%s' <======",
strings.ToUpper(bs.Req.Method), time.Since(start), err.Error())
} else {
modelhelper.SetStackState(req.StackID, "Stack building finished", stackstate.Initialized)
log.Info("======> %s finished (time: %s) <======", strings.ToUpper(bs.Req.Method), time.Since(start))
}
bs.Eventer.Push(finalEvent)
}()
return nil
}
func (bs *BaseStack) destroy(ctx context.Context, req *stack.ApplyRequest) error {
log := bs.Log.New(req.StackID)
bs.Eventer.Push(&eventer.Event{
Message: bs.Req.Method + " started",
Status: machinestate.Terminating,
})
start := time.Now()
modelhelper.SetStackState(req.StackID, "Stack destroying started", stackstate.Destroying)
log.Info("======> %s (destroy) started <======", strings.ToUpper(bs.Req.Method))
bs.Eventer.Push(&eventer.Event{
Message: "Fetching and validating machines",
Percentage: 20,
Status: machinestate.Terminating,
})
if err := bs.Builder.BuildMachines(ctx); err != nil {
return err
}
if err := bs.Builder.Database.Detach(); err != nil {
return err
}
// This part is done asynchronously.
go func() {
finalEvent := &eventer.Event{
Message: bs.Req.Method + " finished",
Percentage: 100,
Status: machinestate.Terminated,
}
err := bs.destroyAsync(ctx, req)
if err != nil {
// don't pass the error directly to the eventer, mask it to avoid
// error leaking to the client. We just log it here.
finalEvent.Error = err.Error()
log.Error("======> %s finished with error (time: %s): '%s' <======",
strings.ToUpper(bs.Req.Method), time.Since(start), err)
} else {
log.Info("======> %s finished (time: %s) <======", strings.ToUpper(bs.Req.Method), time.Since(start))
}
bs.Eventer.Push(finalEvent)
}()
return nil
}
// Detach implements the Database interface.
func (db *mongoDatabase) Detach(opts *DetachOptions) error {
const detachReason = "Stack destroy requested."
if err := opts.Valid(); err != nil {
return err
}
// 1) Detach stack from user. Failure is critical, as upon return
// a user would not be able to create new stack.
detachStack := modelhelper.Selector{
"targetName": "JStackTemplate",
"targetId": opts.Stack.BaseStackId,
"sourceName": "JAccount",
"sourceId": opts.Stack.OriginId,
"as": "user",
}
err := modelhelper.DeleteRelationships(detachStack)
if err != nil && err != mgo.ErrNotFound {
return err
}
// 2) Set stack to "destroying" state.
id := opts.Stack.Id.Hex()
err = modelhelper.SetStackState(id, detachReason, stackstate.Destroying)
if err != nil && err != mgo.ErrNotFound {
// Stack state update failure is not critical, as jComputeStack
// is going to be removed either way at the end of destroy op.
opts.Log.Error("unable to set stack state to %q", stackstate.Destroying)
}
// 3) Update counters.
err = modelhelper.DecrementOrCreateCounter(opts.Stack.Group, modelhelper.CounterStacks, 1)
if err != nil {
// Counter update is not crucial, nevertheless we log an error
// if updating failed for whatever reason.
opts.Log.Error("failure updating %q counter", modelhelper.CounterStacks)
}
err = modelhelper.DecrementOrCreateCounter(opts.Stack.Group, modelhelper.CounterInstances, len(opts.Stack.Machines))
if err != nil {
// Counter update is not crucial, nevertheless we log an error
// if updating failed for whatever reason.
opts.Log.Error("failure updating %q counter", modelhelper.CounterInstances)
}
// 4) Detach machines from user.
detachMachines := bson.M{
"$set": bson.M{
"status.state": "Terminated",
"users": []interface{}{},
},
}
err = modelhelper.UpdateMachines(detachMachines, opts.Stack.Machines...)
if err != nil && err != mgo.ErrNotFound {
// Detaching users from machines error is not critical, as the jMachine
// documents are going to be deleted at the end of destroy operation.
// Nevertheless we log error in case a troubleshooting would be needed.
opts.Log.Error("detaching users from machines failed: %s", err)
}
return nil
}