You can use IPv6address.has-a.name as a domain name for any of your containers or VMs. The required format is 1234-5678-9abc-def0-1234-5678-9abc-def0.has-a.name. This is already a valid name and points to the IPv6 address 1234:5678:9abc:def0:1234:5678:9abc:def0.
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