Updating a stack

Here, as an example, we explain the procedure for updating a stack using a Heat template, using the IaaS service portal.

This performs update of a stack that has already been created in advance.

Of the example Heat templates used in this document, first, use "Example virtual server creation Heat template" (Creating_a_virtual_server.yaml) to create a resource.

For the created stack, perform update using the example Heat template "Example Heat template for changing the flavor of a virtual server using stack update" (Updating_a_virtual_server.yaml) in this document.

The procedure for updating a stack is given below.

1. Display "Template" > "Stack List", and click "Action" of the stack to update.
   
2. Click "Edit".
   
3. Click the "URL" of "Edit Stack" > "How to Specify Template".
   
4. Select "YAML".
   
5. Enter the details of the YAML file from "Edit Stack" > "YAML Editor", and then click "Parameter Settings".
   
6. "Template Parameters Setting" is displayed.
   Place a check in the checkbox of the parameter to update, enter the updated value in "Value", and then click "Apply".
   
   CAUTION:

   • If the value of a parameter is changed without checking the checkbox, the change will not be reflected and the original value will be used.
7. When "Are you sure you want to apply the parameters?" is displayed, click "Apply".
   
8. You are returned to the "Edit Stack" window.
   Click "Update".
   
9. When "A request to edit a stack has been accepted." is displayed, click "Close".
   
10. You are returned to the "Stack List" window.
    "UPDATE_IN_PROGRESS" is displayed for the "Status" of the updated stack.
    Click the update button on the upper right, and confirm that the status is updated.
    *It may take several minutes until the status is updated.
    
11. Confirm that "UPDATE_COMPLETE" (*1) is displayed for the status of the updated stack, and check the details of the resource to see that value of the parameter has been updated.
    
    CAUTION:

    • *1: If the status becomes "UPDATE_FAILED", it is possible to use the API to check the details of the stack creation error. Refer to "Handling errors".

    This ends the update operation for a stack.