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Changes

When a host is in UPDATING state, operations are currently undergone to make the instance converge towards new host’s description. A change is a logical grouping of tasks. A host is in the state UPDATING as long as there is at least one change having at least one task pending. If a single task is in error, host’s state is ERROR.

Representation

The following elements are defined as part of a change:

• orderNum: A number allowing to sort changes in the order they actually where triggered.
• description: A human friendly description of this change.
• tasks: A list of tasks. A task is defined by following elements:
  • orderNum: A number allowing to sort tasks in the order they actually where triggered.
  • status: The current status of the task. Possible values are PENDING, OK and ERROR.
  • description: A human friendly description of this task.
  • error: If status has value ERROR, an error message.

Example

{
    "orderNum" : 0,
    "description" : "Install WebServer",
    "tasks" : [
        {
            "orderNum" : 0,
            "status" : "OK",
            "description" : "add package httpd"
        },
        {
            "orderNum" : 1,
            "status" : "PENDING",
            "description" : "restart service httpd"
        }
    ]
}

Methods

Changes are part of sub-collections of a host, below URLs are therefore relative.

Collection

changes[?show_processed=[true|false]]

• GET: returns the list of changes. If show_processed is true, all changes are returned. Otherwise, only pending changes are returned (default behavior if show_processed is not set).
• DELETE: deletes all changes. Host’s state may be altered (i.e. go back to READY state).

Entity

changes/{order_num}

• GET: returns a change.
• DELETE: deletes a change. Host’s state may be altered (i.e. go back to READY state).