forked from pulumi/pulumi
/
state.go
283 lines (239 loc) · 7.52 KB
/
state.go
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// Copyright 2016-2018, Pulumi Corporation.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package httpstate
import (
"context"
"fmt"
"time"
"github.com/pkg/errors"
"github.com/pulumi/pulumi/pkg/apitype"
"github.com/pulumi/pulumi/pkg/backend"
"github.com/pulumi/pulumi/pkg/backend/display"
"github.com/pulumi/pulumi/pkg/backend/httpstate/client"
"github.com/pulumi/pulumi/pkg/diag"
"github.com/pulumi/pulumi/pkg/diag/colors"
"github.com/pulumi/pulumi/pkg/engine"
"github.com/pulumi/pulumi/pkg/resource"
"github.com/pulumi/pulumi/pkg/resource/deploy"
"github.com/pulumi/pulumi/pkg/resource/stack"
"github.com/pulumi/pulumi/pkg/workspace"
)
type tokenRequest chan<- tokenResponse
type tokenResponse struct {
token string
err error
}
// tokenSource is a helper type that manages the renewal of the lease token for a managed update.
type tokenSource struct {
requests chan tokenRequest
done chan bool
}
func newTokenSource(ctx context.Context, token string, backend *cloudBackend, update client.UpdateIdentifier,
duration time.Duration) (*tokenSource, error) {
// Perform an initial lease renewal.
newToken, err := backend.client.RenewUpdateLease(ctx, update, token, duration)
if err != nil {
return nil, err
}
requests, done := make(chan tokenRequest), make(chan bool)
go func() {
// We will renew the lease after 50% of the duration has elapsed to allow more time for retries.
ticker := time.NewTicker(duration / 2)
defer ticker.Stop()
for {
select {
case <-ticker.C:
newToken, err = backend.client.RenewUpdateLease(ctx, update, token, duration)
if err != nil {
ticker.Stop()
} else {
token = newToken
}
case c, ok := <-requests:
if !ok {
close(done)
return
}
resp := tokenResponse{err: err}
if err == nil {
resp.token = token
}
c <- resp
}
}
}()
return &tokenSource{requests: requests, done: done}, nil
}
func (ts *tokenSource) Close() {
close(ts.requests)
<-ts.done
}
func (ts *tokenSource) GetToken() (string, error) {
ch := make(chan tokenResponse)
ts.requests <- ch
resp := <-ch
return resp.token, resp.err
}
// cloudUpdate is an implementation of engine.Update backed by remote state and a local program.
type cloudUpdate struct {
context context.Context
backend *cloudBackend
update client.UpdateIdentifier
tokenSource *tokenSource
root string
proj *workspace.Project
target *deploy.Target
}
func (u *cloudUpdate) GetRoot() string {
return u.root
}
func (u *cloudUpdate) GetProject() *workspace.Project {
return u.proj
}
func (u *cloudUpdate) GetTarget() *deploy.Target {
return u.target
}
func (u *cloudUpdate) Complete(status apitype.UpdateStatus) error {
defer u.tokenSource.Close()
token, err := u.tokenSource.GetToken()
if err != nil {
return err
}
return u.backend.client.CompleteUpdate(u.context, u.update, status, token)
}
func (u *cloudUpdate) recordEvent(
action apitype.UpdateKind, event engine.Event, seen map[resource.URN]engine.StepEventMetadata,
opts display.Options) error {
// If we don't have a token source, we can't perform any mutations.
if u.tokenSource == nil {
return nil
}
fields := make(map[string]interface{})
kind := string(apitype.StdoutEvent)
if event.Type == engine.DiagEvent {
payload := event.Payload.(engine.DiagEventPayload)
fields["severity"] = string(payload.Severity)
if payload.Severity == diag.Error || payload.Severity == diag.Warning {
kind = string(apitype.StderrEvent)
}
}
// Ensure we render events with raw colorization tags. Also, render these as 'diff' events so
// the user has a rich diff-log they can see when the look at their logs in the service.
opts.Color = colors.Raw
msg := display.RenderDiffEvent(action, event, seen, opts)
if msg == "" {
return nil
}
token, err := u.tokenSource.GetToken()
if err != nil {
return err
}
fields["text"] = msg
fields["colorize"] = colors.Always
return u.backend.client.AppendUpdateLogEntry(u.context, u.update, kind, fields, token)
}
func (u *cloudUpdate) RecordAndDisplayEvents(op string, action apitype.UpdateKind,
events <-chan engine.Event, done chan<- bool, opts display.Options) {
// Start the local display processor. Display things however the options have been
// set to display (i.e. diff vs progress).
displayEvents := make(chan engine.Event)
go display.ShowEvents(op, action, displayEvents, done, opts)
seen := make(map[resource.URN]engine.StepEventMetadata)
for e := range events {
// First echo the event to the local display.
displayEvents <- e
// Then render and record the event for posterity.
if err := u.recordEvent(action, e, seen, opts); err != nil {
diagEvent := engine.Event{
Type: engine.DiagEvent,
Payload: engine.DiagEventPayload{
Message: fmt.Sprintf("failed to record event: %v", err),
Severity: diag.Infoerr,
},
}
displayEvents <- diagEvent
}
if e.Type == engine.CancelEvent {
return
}
}
}
func (b *cloudBackend) newUpdate(ctx context.Context, stackRef backend.StackReference, proj *workspace.Project,
root string, update client.UpdateIdentifier, token string) (*cloudUpdate, error) {
// Create a token source for this update if necessary.
var tokenSource *tokenSource
if token != "" {
ts, err := newTokenSource(ctx, token, b, update, 5*time.Minute)
if err != nil {
return nil, err
}
tokenSource = ts
}
// Construct the deployment target.
target, err := b.getTarget(ctx, stackRef)
if err != nil {
return nil, err
}
// Construct and return a new update.
return &cloudUpdate{
context: ctx,
backend: b,
update: update,
tokenSource: tokenSource,
root: root,
proj: proj,
target: target,
}, nil
}
func (b *cloudBackend) getSnapshot(ctx context.Context, stackRef backend.StackReference) (*deploy.Snapshot, error) {
untypedDeployment, err := b.ExportDeployment(ctx, stackRef)
if err != nil {
return nil, err
}
snapshot, err := stack.DeserializeUntypedDeployment(untypedDeployment)
if err != nil {
return nil, err
}
return snapshot, nil
}
func (b *cloudBackend) getTarget(ctx context.Context, stackRef backend.StackReference) (*deploy.Target, error) {
// Pull the local stack info so we can get at its configuration bag.
stk, err := workspace.DetectProjectStack(stackRef.Name())
if err != nil {
return nil, err
}
decrypter, err := b.GetStackCrypter(stackRef)
if err != nil {
return nil, err
}
snapshot, err := b.getSnapshot(ctx, stackRef)
if err != nil {
switch err {
case stack.ErrDeploymentSchemaVersionTooOld:
return nil, fmt.Errorf("the stack '%s' is too old to be used by this version of the Pulumi CLI",
stackRef.Name())
case stack.ErrDeploymentSchemaVersionTooNew:
return nil, fmt.Errorf("the stack '%s' is newer than what this version of the Pulumi CLI understands. "+
"Please update your version of the Pulumi CLI", stackRef.Name())
default:
return nil, errors.Wrap(err, "could not deserialize deployment")
}
}
return &deploy.Target{
Name: stackRef.Name(),
Config: stk.Config,
Decrypter: decrypter,
Snapshot: snapshot,
}, nil
}