Most of the errors in this package are holdovers from our previous syetem where we had our own custom compiler and evaluator and are no longer needed. The few we still use during plan applicaton (via the diagnostics system, which is another component from the old system that we still use) have been promoted into the diag package. Doing so, allows us to not have to import "github.com/pkg/errors" as "goerr" in some parts of the engine, a nice cleaup.
232 lines
7.6 KiB
Go
232 lines
7.6 KiB
Go
// Copyright 2017, Pulumi Corporation. All rights reserved.
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package engine
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import (
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"bytes"
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"fmt"
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"time"
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"github.com/pkg/errors"
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"github.com/pulumi/pulumi/pkg/diag"
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"github.com/pulumi/pulumi/pkg/diag/colors"
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"github.com/pulumi/pulumi/pkg/resource"
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"github.com/pulumi/pulumi/pkg/resource/deploy"
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"github.com/pulumi/pulumi/pkg/util/contract"
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)
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// UpdateOptions contains all the settings for customizing how an update (deploy, preview, or destroy) is performed.
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type UpdateOptions struct {
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Analyzers []string // an optional set of analyzers to run as part of this deployment.
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DryRun bool // true if we should just print the plan without performing it.
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Parallel int // the degree of parallelism for resource operations (<=1 for serial).
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ShowConfig bool // true to show the configuration variables being used.
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ShowReplacementSteps bool // true to show the replacement steps in the plan.
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ShowSames bool // true to show the resources that aren't updated in addition to updates.
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Summary bool // true if we should only summarize resources and operations.
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}
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// ResourceChanges contains the aggregate resource changes by operation type.
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type ResourceChanges map[deploy.StepOp]int
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func Deploy(update Update, events chan<- Event, opts UpdateOptions) (ResourceChanges, error) {
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contract.Require(update != nil, "update")
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contract.Require(events != nil, "events")
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defer func() { events <- cancelEvent() }()
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info, err := planContextFromUpdate(update)
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if err != nil {
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return nil, err
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}
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defer info.Close()
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return deployLatest(info, deployOptions{
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UpdateOptions: opts,
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Destroy: false,
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Events: events,
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Diag: newEventSink(events),
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})
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}
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type deployOptions struct {
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UpdateOptions
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Destroy bool // true if we are destroying the stack.
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Detailed bool // true to show very detailed output, like properties that haven't changed.
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DOT bool // true if we should print the DOT file for this plan.
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Events chan<- Event // the channel to write events from the engine to.
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Diag diag.Sink // the sink to use for diag'ing.
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}
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func deployLatest(info *planContext, opts deployOptions) (ResourceChanges, error) {
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result, err := plan(info, opts)
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if err != nil {
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return nil, err
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}
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var resourceChanges ResourceChanges
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if result != nil {
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defer contract.IgnoreClose(result)
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// Make the current working directory the same as the program's, and restore it upon exit.
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done, err := result.Chdir()
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if err != nil {
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return nil, err
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}
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defer done()
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if opts.DryRun {
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// If a dry run, just print the plan, don't actually carry out the deployment.
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resourceChanges, err = printPlan(result)
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if err != nil {
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return resourceChanges, err
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}
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} else {
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// Otherwise, we will actually deploy the latest bits.
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var header bytes.Buffer
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printPrelude(&header, result, false)
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header.WriteString(fmt.Sprintf("%vPerforming changes:%v\n", colors.SpecUnimportant, colors.Reset))
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opts.Events <- stdOutEventWithColor(&header)
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// Walk the plan, reporting progress and executing the actual operations as we go.
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start := time.Now()
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actions := newDeployActions(info.Update, opts)
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summary, _, _, err := result.Walk(actions, false)
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if err != nil && summary == nil {
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// Something went wrong, and no changes were made.
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return resourceChanges, err
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}
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contract.Assert(summary != nil)
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// Print a summary.
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var footer bytes.Buffer
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// Print out the total number of steps performed (and their kinds), the duration, and any summary info.
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resourceChanges = ResourceChanges(actions.Ops)
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if c := printChangeSummary(&footer, resourceChanges, false); c != 0 {
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footer.WriteString(fmt.Sprintf("%vUpdate duration: %v%v\n",
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colors.SpecUnimportant, time.Since(start), colors.Reset))
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}
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if actions.MaybeCorrupt {
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footer.WriteString(fmt.Sprintf(
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"%vA catastrophic error occurred; resources states may be unknown%v\n",
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colors.SpecAttention, colors.Reset))
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}
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opts.Events <- stdOutEventWithColor(&footer)
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if err != nil {
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return resourceChanges, err
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}
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}
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}
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if !opts.Diag.Success() {
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// If any error that wasn't printed above, be sure to make it evident in the output.
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return resourceChanges, errors.New("One or more errors occurred during this update")
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}
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return resourceChanges, nil
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}
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// deployActions pretty-prints the plan application process as it goes.
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type deployActions struct {
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Steps int
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Ops map[deploy.StepOp]int
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Seen map[resource.URN]deploy.Step
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Shown map[resource.URN]bool
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MaybeCorrupt bool
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Update Update
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Opts deployOptions
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}
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func newDeployActions(update Update, opts deployOptions) *deployActions {
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return &deployActions{
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Ops: make(map[deploy.StepOp]int),
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Seen: make(map[resource.URN]deploy.Step),
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Shown: make(map[resource.URN]bool),
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Update: update,
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Opts: opts,
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}
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}
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func (acts *deployActions) OnResourceStepPre(step deploy.Step) (interface{}, error) {
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// Report the beginning of the step if appropriate.
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if shouldShow(acts.Seen, step, acts.Opts) || isRootStack(step) {
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var b bytes.Buffer
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printStep(&b, step, acts.Seen, acts.Shown, acts.Opts.Summary, acts.Opts.Detailed, false, 0 /*indent*/)
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acts.Opts.Events <- stdOutEventWithColor(&b)
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}
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// Inform the snapshot service that we are about to perform a step.
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return acts.Update.BeginMutation()
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}
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func (acts *deployActions) OnResourceStepPost(ctx interface{},
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step deploy.Step, status resource.Status, err error) error {
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var b bytes.Buffer
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// Report the result of the step.
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stepop := step.Op()
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if err != nil {
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// Issue a true, bonafide error.
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acts.Opts.Diag.Errorf(diag.ErrorPlanApplyFailed, err)
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// Print the state of the resource; we don't issue the error, because the deploy above will do that.
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stepnum := acts.Steps + 1
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b.WriteString(fmt.Sprintf("Step #%v failed [%v]: ", stepnum, stepop))
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switch status {
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case resource.StatusOK:
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b.WriteString(colors.SpecNote)
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b.WriteString("provider successfully recovered from this failure")
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case resource.StatusUnknown:
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b.WriteString(colors.SpecAttention)
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b.WriteString("this failure was catastrophic and the provider cannot guarantee recovery")
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acts.MaybeCorrupt = true
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default:
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contract.Failf("Unrecognized resource state: %v", status)
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}
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b.WriteString(colors.Reset)
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b.WriteString("\n")
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} else {
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if step.Logical() {
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// Increment the counters.
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acts.Steps++
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acts.Ops[stepop]++
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}
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// Also show outputs here, since there might be some from the initial registration.
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if shouldShow(acts.Seen, step, acts.Opts) && !acts.Opts.Summary {
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printResourceOutputProperties(&b, step, acts.Seen, acts.Shown, false, 0 /*indent*/)
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}
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}
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acts.Opts.Events <- stdOutEventWithColor(&b)
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// Write out the current snapshot. Note that even if a failure has occurred, we should still have a
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// safe checkpoint. Note that any error that occurs when writing the checkpoint trumps the error reported above.
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return ctx.(SnapshotMutation).End(step.Iterator().Snap())
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}
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func (acts *deployActions) OnResourceOutputs(step deploy.Step) error {
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// Print this step's output properties.
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if (shouldShow(acts.Seen, step, acts.Opts) || isRootStack(step)) && !acts.Opts.Summary {
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var b bytes.Buffer
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printResourceOutputProperties(&b, step, acts.Seen, acts.Shown, false, 0 /*indent*/)
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acts.Opts.Events <- stdOutEventWithColor(&b)
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}
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// There's a chance there are new outputs that weren't written out last time.
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// We need to perform another snapshot write to ensure they get written out.
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mutation, err := acts.Update.BeginMutation()
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if err != nil {
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return err
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}
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return mutation.End(step.Iterator().Snap())
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}
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