This commit fixes the issue of headscale crashing after sending on a
closed channel by moving the channel close to the sender side, instead
of the creator. closeChanWithLog is also implemented with generics now.
Fixes: https://github.com/juanfont/headscale/issues/342
Signed-off-by: Moritz Poldrack <git@moritz.sh>
This call should be done quite at each modification of a server resources like RequestTags.
When a server changes it's tag we should rebuild the ACL rules.
When a server is added to headscale we also should update the ACLRules.
* Resolves an issue where sometimes attempted sends on a closed channel
happened by ensuring the channels remain open for the entire goroutine.
* May be of help with regards to issue #203
This commit converts all the uses of wgkey to the new key interfaces.
It now has specific machine, node and discovery keys and we now should
use them correctly.
Please note the new logic which strips a key prefix (in utils.go) that
is now standard inside tailscale.
In theory we could put it in the database, but to preserve backwards
compatibility and not spend a lot of resources on accounting for both,
we just strip them.
There is some weird behaviour that seem to storm the update channel. And
our solution with a central map of update channels isnt particularly
elegant.
For now, replace all the complicated stuff with a simple channel that
checks roughly every 10s if the node is up to date. Only generate and
update if there has been changes.
This tries to make the same functions emit and consume the same type of
data all over the application.
If a function transform data, it should emit new data, not a pointer.
This commit adds some Prometheus metrics to /metrics in headscale.
It will add the standard go metrics, some automatic gin metrics and some
initial headscale specific ones.
Some of them has been added to aid debugging #97 (loop bug)
In the future, we can use the metrics to get rid of the sleep in the
integration tests by checking that our expected number of nodes has been
registered:
```
headscale_machine_registrations_total
```
