The iperf3 server sometimes hangs, or takes a while to startup.
Rather than trying to reset the iperf3 state between performance tests,
this PR refactors them so they each run in their matrix job. This
ensures each performance test will run on a separate VM, unaffected by
previous test runs to eliminate the effect any residual network buffer
state can have on a particular test.
It also makes sure the server is listening with a `healthcheck`.
So the cause of the flaky tests is that they aren't waiting long enough
for a connection to be established. Both the test in #3666 and the
`iperf` tests have a timeout of 10 seconds.
Connections _should_ be established **very quickly** in CI. However, I
have a few guesses as to why they might not be, essentially causing us
to have to wait for a timeout to re-initiate a connection request:
- Packets arrive out of order or too quickly for the WireGuard state
machine to establish a handshake.
- Too many ICE candidates gathered (the gateway has 3 interfaces)
This PR:
- Refactors the iperf tests to be a little easier to maintain
- Ensures `integration-tests` run for at least 30 seconds before timing
out
In any case, we can debug / optimize this further after snownet is
merged, which might just solve the problem completely.
If `FIREZONE_DNS_CONTROL` is set to `systemd-resolved`, then shell out
to `resolvectl` to request all system DNS queries to go to Firezone's
sentinel DNS server(s).
```[tasklist]
- [ ] Figure out how to stop the runner from using the Docker bridge iface
```
---------
Signed-off-by: Reactor Scram <ReactorScram@users.noreply.github.com>
Co-authored-by: Thomas Eizinger <thomas@eizinger.io>
Attempt at cleaning a couple things I missed in code review.
The old httpbin resource wasn't being used anyhow, so I just deduped
them and updated things in a couple other places that had drifted.
Hopefully this fixes the [flaky
CI](https://github.com/firezone/firezone/actions/runs/7918422653/job/21616835910)
Regardless of `FIREZONE_DNS_CONTROL`, always try to notify systemd that
we've started.
I had accidentally conflated the idea of running as a systemd service
with the idea of using systemd to control DNS. They're separate, but
I'll keep the service unit in here and always use `sd-notify` since it
should be harmless to use even in Alpine.
~~If `FIREZONE_DNS_CONTROL` is `systemd-resolved`, try to notify systemd
that we've finished startup and the tunnel is ready.~~
Also adds a CI test, including a systemd service file that is **not**
ready for general use.
Ready for review once it's green.
---------
Signed-off-by: Reactor Scram <ReactorScram@users.noreply.github.com>
Co-authored-by: Thomas Eizinger <thomas@eizinger.io>
Only user-facing if users are using the Docker image for the Linux
client.
I split off a module for `/etc/resolv.conf` since the code and unit
tests are about 300 lines and aren't related to the rest of the
`tun_linux.rs` code.
---------
Signed-off-by: Reactor Scram <ReactorScram@users.noreply.github.com>
This improves maintenance because we can now use a regular matrix for
the integration tests and one can locally use tools like shellcheck or a
`bash-lsp` during development.
---------
Signed-off-by: Jamil <jamilbk@users.noreply.github.com>
Co-authored-by: Jamil <jamilbk@users.noreply.github.com>
