open-nomad/.changelog/16826.txt

```release-note:improvement
ephemeral disk: migrate=true now implies sticky=true
```
ephemeral disk: `migrate` should imply `sticky` (#16826) The `ephemeral_disk` block's `migrate` field allows for best-effort migration of the ephemeral disk data to new nodes. The documentation says the `migrate` field is only respected if `sticky=true`, but in fact if client ACLs are not set the data is migrated even if `sticky=false`. The existing behavior when client ACLs are disabled has existed since the early implementation, so "fixing" that case now would silently break backwards compatibility. Additionally, having `migrate` not imply `sticky` seems nonsensical: it suggests that if we place on a new node we migrate the data but if we place on the same node, we throw the data away! Update so that `migrate=true` implies `sticky=true` as follows: * The failure mode when client ACLs are enabled comes from the server not passing along a migration token. Update the server so that the server provides a migration token whenever `migrate=true` and not just when `sticky=true` too. * Update the scheduler so that `migrate` implies `sticky`. * Update the client so that we check for `migrate \|\| sticky` where appropriate. * Refactor the E2E tests to move them off the old framework and make the intention of the test more clear. 2023-04-07 20:33:45 +00:00			```release-note:improvement
			`ephemeral disk: migrate=true now implies sticky=true`
			```