Heat resource 'Updates cause replacement' question

Sihan
21 ●6 ●9 ●11

Every property has either 'Updates cause replacement' or 'Can be updated without replacement.'

I am confused what the replacement mean? Does it mean that I need to redeploy the stack if I want to change the property value?

Thanks

Sihan

546 ●1 ●8 ●12

Let's use this silly example:

 resources:
   resA:
    type: foo
    properties:
      x: 1
      y: 2
   resB:
    type: foo

For the example x is updateReplace and y is updatable.

I change property x from "1" to "4" and stack-update, result: only resource A is deleted then re-created
I change property y from "2" to "3" and stack-update, result: only resource B is updated

Note: these field settings come from the underlying services that don't allow certain fields to be updated and are only available on create.

1 answer