* Remove the server_id from session table, change it to worker_id on session_connection
This is step 1 in updating the worker table. The worker is becoming a public resource so it must have
a public id. We drop the server_id column on the session_connection table and add the worker_id column
so we can use the wt_public_key type. Since db migrations are applied while the controller is offline,
it should be safe to assume all session connections are not in a running state, thus allowing us to null
out all the worker ids in the session_connection table.
For now we don't have very good enforcement of the wt_public_id constraints, since the id is currently
defined in the worker config, but this will soon change and the worker's id will be generated by the
controller.
* Move the server daemons into their own package
With this change the internal/server package now is dedicated to the server domain (workers and controllers) and not to the server daemons.
The hope is that this will make it easier to keep the daemons decoupled from the representation of the servers in the database.
It is documented as illegal to use t.FailNow in a goroutine.
Uses of require assertions call t.FailNow. This may have led to
inconsistent test results as some assertions were subject to
undefined behavior. Note that it is still allowed to call
assert assertions in goroutines.
See: https://pkg.go.dev/testing#T.FailNow
This adds functionality to ensure that connections are closed on a
worker when the server is shut down or reloaded.
Connections are closed, and then the shutdown process waits for the next
report to the controller to go through, waiting the grace period that
was added in #1330. The rest of shutdown is then proceeded with.
Listener shutdown has been moved to the start of the process to ensure
that new connections can't be made while we are shutting down.
Additionally, functionality has been added to force shut down servers
after a second interrupt has been received after the first one. This
takes the form of code in both the server and dev mode code paths that
just performs an os.Exit if another shutdown is received during the
normal shutdown process.
Additionally, the commit also includes some refactoring to tests so that
we could use some of the new E2E testing code to test session
connections during shutdown and reload.
Additionally, this fixes a panic in worker startup when there are no
controllers defined. Looks like the shutdown call was attempting to call
into the controller, not the worker.
Finally, this also removes the extra shutdown within the outer worker
startup.
Shutdown is actually handled within the inner StartWorker(), attempting
shutdown on errors was actually leading to potential use of an
uninitialized worker, which is leading to panics in testing.
Jeff Mitchell
Todd
Johan Brandhorst-Satzkorn
Irena Rindos
Timothy Messier
Louis Ruch
Jim
Chris Marchesi