prober uses NewRegionClient() to connect to a derper using a faked up
single-node region, but NewRegionClient() fails to connect if there is
no non-STUN only client in the region. Set the STUN only flag to false
before we call NewRegionClient() so we can monitor nodes marked as
STUN only in the default derpmap.
Updates #11492
Signed-off-by: Val <valerie@tailscale.com>
go vet complains when we copy a lock value. Create clone function that
copies everything but the lock value.
Fixes#8207
Signed-off-by: Val <valerie@tailscale.com>
~97% of the log messages derper outputs are related to the normal
non-error state of a client disconnecting in some manner. Add a
verbose logging feature that only logs these messages when enabled.
Fixes#8024
Signed-off-by: Val <valerie@tailscale.com>
Make developing derp easier by:
1. Creating an envknob telling clients to use HTTP to connect to derp
servers, so devs don't have to acquire a valid TLS cert.
2. Creating an envknob telling clients which derp server to connect
to, so devs don't have to edit the ACLs in the admin console to add a
custom DERP map.
3. Explaining how the -dev and -a command lines args to derper
interact.
To use this:
1. Run derper with -dev.
2. Run tailscaled with TS_DEBUG_USE_DERP_HTTP=1 and
TS_DEBUG_USE_DERP_ADDR=localhost
This will result in the client connecting to derp via HTTP on port
3340.
Fixes#7700
Signed-off-by: Val <valerie@tailscale.com>
valscaleandGitHub