Resource Orchestration Service (ROS) can automatically generate a random string of a specified length by using the AutoCompleteInput association property.
In the Parameters section of a template, set AssociationProperty to AutoCompleteInput and configure the Length, Prefix, and CharacterClasses properties in AssociationPropertyMetadata to control the generated string. For more information, see AssociationProperty and AssociationPropertyMetadata.
{
"ROSTemplateFormatVersion": "2015-09-01",
"Parameters": {
"RandomName": {
"Type": "String",
"Label": {
"en": "Random Name"
},
"AssociationProperty": "AutoCompleteInput",
"AssociationPropertyMetadata": {
"Length": 5,
"Prefix": "test-ros",
"CharacterClasses": [
{
"Class": "lowercase",
"min": 1
}
]
}
}
},
"Outputs": {
"RandomNameStr": {
"Value": {
"Ref": "RandomName"
}
}
}
}Console example
On the stack details page in the ROS console, click the Outputs tab to view the stack output. The output key is RandomNameStr, and its value is test-rostpfjb.