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Merge pull request #4 from salasberryfin/janitor-initial-version
✨ Prepare janitor for initial version
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,114 @@ | ||
| package action | ||
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| import ( | ||
| "context" | ||
| "fmt" | ||
|
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| "github.com/aws/aws-sdk-go/aws" | ||
| cf "github.com/aws/aws-sdk-go/service/cloudformation" | ||
| ) | ||
|
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| func (a *action) cleanCfStacks(ctx context.Context, input *CleanupScope) error { | ||
| client := cf.New(input.Session) | ||
|
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| stacksToDelete := []*string{} | ||
| pageFunc := func(page *cf.DescribeStacksOutput, _ bool) bool { | ||
| for _, stack := range page.Stacks { | ||
| var ignore, markedForDeletion bool | ||
| for _, tag := range stack.Tags { | ||
| if *tag.Key == input.IgnoreTag { | ||
| ignore = true | ||
| } else if *tag.Key == DeletionTag { | ||
| markedForDeletion = true | ||
| } | ||
| } | ||
|
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| if ignore { | ||
| LogDebug("cloudformation stack %s has ignore tag, skipping cleanup", *stack.StackName) | ||
| continue | ||
| } | ||
|
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| if !markedForDeletion { | ||
| // NOTE: only mark for future deletion if we're not running in dry-mode | ||
| if a.commit { | ||
| LogDebug("cloudformation stack %s does not have deletion tag, marking for future deletion and skipping cleanup", *stack.StackName) | ||
| if err := a.markCfStackForFutureDeletion(ctx, stack, client); err != nil { | ||
| LogError("failed to mark cloudformation stack %s for future deletion: %s", *stack.StackName, err.Error()) | ||
| } | ||
| } | ||
| continue | ||
| } | ||
|
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| switch aws.StringValue(stack.StackStatus) { | ||
| case cf.ResourceStatusDeleteComplete, | ||
| cf.ResourceStatusDeleteInProgress: | ||
| LogDebug("cloudformation stack %s is already deleted/deleting, skipping cleanup", *stack.StackName) | ||
| continue | ||
| } | ||
|
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| LogDebug("adding cloudformation stack %s to delete list", *stack.StackName) | ||
| stacksToDelete = append(stacksToDelete, stack.StackName) | ||
| } | ||
|
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| return true | ||
| } | ||
|
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| if err := client.DescribeStacksPagesWithContext(ctx, &cf.DescribeStacksInput{}, pageFunc); err != nil { | ||
| return fmt.Errorf("failed getting list of cloudformation stacks: %w", err) | ||
| } | ||
|
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| if len(stacksToDelete) == 0 { | ||
| Log("no cloudformation stacks to delete") | ||
| return nil | ||
| } | ||
|
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| for _, stackName := range stacksToDelete { | ||
| if !a.commit { | ||
| LogDebug("skipping deletion of cloudformation stack %s as running in dry-mode", *stackName) | ||
| continue | ||
| } | ||
|
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| if err := a.deleteCfStack(ctx, *stackName, client); err != nil { | ||
| LogError("failed to delete cloudformation stack %s: %s", *stackName, err.Error()) | ||
| } | ||
| } | ||
|
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| return nil | ||
| } | ||
|
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| func (a *action) markCfStackForFutureDeletion(ctx context.Context, stack *cf.Stack, client *cf.CloudFormation) error { | ||
| Log("Marking CloudFormation stack %s for future deletion", *stack.StackName) | ||
|
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| stack.SetTags(append(stack.Tags, &cf.Tag{Key: aws.String(DeletionTag), Value: aws.String("true")})) | ||
|
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| LogDebug("Updating tags for cloudformation stack %s", *stack.StackName) | ||
|
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| if _, err := client.UpdateStackWithContext(ctx, &cf.UpdateStackInput{ | ||
| Capabilities: stack.Capabilities, | ||
| StackName: stack.StackName, | ||
| Tags: stack.Tags, | ||
| UsePreviousTemplate: aws.Bool(true), | ||
| }); err != nil { | ||
| return fmt.Errorf("failed to update cloudformation stack %s: %w", *stack.StackName, err) | ||
| } | ||
|
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| if err := client.WaitUntilStackUpdateCompleteWithContext(ctx, &cf.DescribeStacksInput{StackName: stack.StackName}); err != nil { | ||
| return fmt.Errorf("failed to wait for cloudformation stack %s to update: %w", *stack.StackName, err) | ||
| } | ||
|
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| return nil | ||
| } | ||
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| func (a *action) deleteCfStack(ctx context.Context, stackName string, client *cf.CloudFormation) error { | ||
| Log("Deleting CloudFormation stack %s", stackName) | ||
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| if _, err := client.DeleteStackWithContext(ctx, &cf.DeleteStackInput{StackName: &stackName}); err != nil { | ||
| return fmt.Errorf("failed to delete cloudformation stack %s: %w", stackName, err) | ||
| } | ||
|
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| if err := client.WaitUntilStackDeleteCompleteWithContext(ctx, &cf.DescribeStacksInput{StackName: &stackName}); err != nil { | ||
| return fmt.Errorf("failed to wait for cloudformation stack %s to delete: %w", stackName, err) | ||
| } | ||
|
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| return nil | ||
| } |
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