24.3. Associating Tags

24.3.1. Associating Tags With a Host, User or VM

The collection referenced by link rel="tags" from a host, user or vms represents the set of tags associated with the entity.
These tag representations also contain a host id, user id or vm id reference to the entity in question.
Associating a tag with an entity is achieved by POSTing a tag reference (identifying the tag either by its id or name) to the collection.

Example 24.2. Associating a tag with a virtual machine

POST /api/vms/5114bb3e-a4e6-44b2-b783-b3eea7d84720/tags HTTP/1.1
Accept: application/xml
Content-Type: application/xml

<tag>
    <name>Finance</name>
</tag>

HTTP/1.1 201 Created
Content-Type: application/xml

<tag id="f436ebfc-67f2-41bd-8ec6-902b6f7dcb5e"
  href="/api/vms/5114bb3e-a4e6-44b2-b783-b3eea7d84720/tags/
  f436ebfc-67f2-41bd-8ec6-902b6f7dcb5e">
    <name>Finance</name>
    <description>Resources for the Finance department</description>
    <vm id="5114bb3e-a4e6-44b2-b783-b3eea7d84720"
      href="/api/vms/5114bb3e-a4e6-44b2-b783-b3eea7d84720"/>
</tag>

24.3.2. Removing a Tag

Removing an association is achieved with a DELETE request to the appropriate element in the collection.

Example 24.3. Removing a tag from a virtual machine

DELETE /api/vms/5114bb3e-a4e6-44b2-b783-b3eea7d84720/tags/f436ebfc-67f2-41bd-8ec6-902b6f7dcb5e HTTP/1.1

HTTP/1.1 204 No Content

24.3.3. Querying a Collection for Tagged Resources

To query the set of entities associated with a given tag, the collection/search URI template for the appropriate collection should be used to search for entities matching tag=MyTag.

Example 24.4. Querying a collection for tagged resources

GET /api/vms?search=tag%3DFinance HTTP/1.1
Accept: application/xml

HTTP/1.1 200 OK
Content-Type: application/xml

<vms>
    <vm id="5114bb3e-a4e6-44b2-b783-b3eea7d84720"
      href="/api/vms/5114bb3e-a4e6-44b2-b783-b3eea7d84720">
        ...
    </vm>
    ...
</vms>