func updateStackViaChangeSet(serviceName string,
cfTemplateURL string,
capabilities []*string,
awsTags []*cloudformation.Tag,
awsCloudFormation *cloudformation.CloudFormation,
logger *logrus.Logger) error {
// Create a change set name...
changeSetRequestName := CloudFormationResourceName(fmt.Sprintf("%sChangeSet", serviceName))
changeSetInput := &cloudformation.CreateChangeSetInput{
Capabilities: capabilities,
ChangeSetName: aws.String(changeSetRequestName),
ClientToken: aws.String(changeSetRequestName),
Description: aws.String(fmt.Sprintf("Change set for service: %s", serviceName)),
StackName: aws.String(serviceName),
TemplateURL: aws.String(cfTemplateURL),
}
if len(awsTags) != 0 {
changeSetInput.Tags = awsTags
}
_, changeSetError := awsCloudFormation.CreateChangeSet(changeSetInput)
if nil != changeSetError {
return changeSetError
}
logger.WithFields(logrus.Fields{
"StackName": serviceName,
}).Info("Issued CreateChangeSet request")
describeChangeSetInput := cloudformation.DescribeChangeSetInput{
ChangeSetName: aws.String(changeSetRequestName),
StackName: aws.String(serviceName),
}
var describeChangeSetOutput *cloudformation.DescribeChangeSetOutput
for waitComplete := false; !waitComplete; {
sleepDuration := time.Duration(11+rand.Int31n(13)) * time.Second
time.Sleep(sleepDuration)
changeSetOutput, describeChangeSetError := awsCloudFormation.DescribeChangeSet(&describeChangeSetInput)
if nil != describeChangeSetError {
return describeChangeSetError
}
describeChangeSetOutput = changeSetOutput
waitComplete = (nil != describeChangeSetOutput)
}
logger.WithFields(logrus.Fields{
"DescribeChangeSetOutput": describeChangeSetOutput,
}).Debug("DescribeChangeSet result")
//////////////////////////////////////////////////////////////////////////////
// If there aren't any changes, then skip it...
if len(describeChangeSetOutput.Changes) <= 0 {
logger.WithFields(logrus.Fields{
"StackName": serviceName,
}).Info("No changes detected for service")
// Delete it...
deleteChangeSetInput := cloudformation.DeleteChangeSetInput{
ChangeSetName: aws.String(changeSetRequestName),
StackName: aws.String(serviceName),
}
_, deleteChangeSetResultErr := awsCloudFormation.DeleteChangeSet(&deleteChangeSetInput)
return deleteChangeSetResultErr
}
//////////////////////////////////////////////////////////////////////////////
// Apply the change
executeChangeSetInput := cloudformation.ExecuteChangeSetInput{
ChangeSetName: aws.String(changeSetRequestName),
StackName: aws.String(serviceName),
}
executeChangeSetOutput, executeChangeSetError := awsCloudFormation.ExecuteChangeSet(&executeChangeSetInput)
logger.WithFields(logrus.Fields{
"ExecuteChangeSetOutput": executeChangeSetOutput,
}).Debug("ExecuteChangeSet result")
if nil == executeChangeSetError {
logger.WithFields(logrus.Fields{
"StackName": serviceName,
}).Info("Issued ExecuteChangeSet request")
}
return executeChangeSetError
}