David Anderson
dbfc916273
derp: add short queues between reader and writer, drop on overload.
...
This avoids the server blocking on misbehaving or heavily contended
clients. We attempt to drop from the head of the queue to keep
overall queueing time lower.
Also:
- fixes server->client keepalives, which weren't happening.
- removes read rate-limiter, deferring instead to kernel-level
global limiter/fair queuer.
Signed-off-by: David Anderson <dave@natulte.net>
2020-03-20 15:14:01 -07:00
David Crawshaw
5ad947c761
cmd/derper: set a write timeout
...
Signed-off-by: David Crawshaw <crawshaw@tailscale.com>
2020-03-12 14:42:48 -04:00
Brad Fitzpatrick
8abdbbdd1f
cmd/derper: also link to /debug/varz
2020-03-06 13:02:01 -08:00
David Anderson
f192c05413
metrics: add a LabelMap type for variables with 1 label dimension.
...
This lets us publish sets of vars that are breakdowns along one
dimension in a format that Prometheus and Grafana natively know
how to do useful things with.
Signed-off-by: David Anderson <dave@natulte.net>
2020-03-04 13:22:50 -08:00
Brad Fitzpatrick
e371520cc5
tsweb, derp: add expvar http.Handler for Prometheus's format
...
And add some opinions.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-03-03 13:59:16 -08:00
Brad Fitzpatrick
dd68debd64
cmd/derper: set autocert Email
...
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-03-03 13:30:50 -08:00
Brad Fitzpatrick
a399ef3dc7
cmd/derper: appease staticcheck
2020-03-02 08:59:50 -08:00
Brad Fitzpatrick
051b6ef141
cmd/derper: accept more LetsEncrypt hostnames without explicit config
2020-03-02 08:55:44 -08:00
Brad Fitzpatrick
00ad93ec25
cmd/derper: add a STUN server
...
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-26 19:11:14 -08:00
Brad Fitzpatrick
824f825552
tsweb, cmd/derper: move common web/debug stuff from derper to new tsweb
...
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-25 10:06:56 -08:00
Brad Fitzpatrick
c763901b1a
cmd/derper: provide debug access over port 80 to trusted (tailscale) IPs
...
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-21 11:52:27 -08:00
Brad Fitzpatrick
2612e54ad1
derp, cmd/derper: add debug handlers, stats
...
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-21 09:35:53 -08:00
Brad Fitzpatrick
37e115834e
cmd/derper: support logging to logtail
...
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-21 07:53:22 -08:00
Brad Fitzpatrick
88f1cc0c98
derp, cmd/derper: add rate limiting support, add default 5Mbps limit
...
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-20 15:26:30 -08:00
Brad Fitzpatrick
b72e6446e2
cmd/derper: add a basic DERP server
...
Mostly Crawshaw's earlier code, refactored a bit.
Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
2020-02-18 11:25:11 -08:00
