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derp: remove "fine for now" intentional slow memory leak from derp server

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It was once believed that it might be useful. It wasn't. We never used it.

Remove it so we don't slowly leak memory.

Signed-off-by: Brad Fitzpatrick <bradfitz@tailscale.com>
This commit is contained in:
Brad Fitzpatrick 2021-07-13 08:14:10 -07:00 committed by Brad Fitzpatrick
parent c84d7baf98
commit 4c0494185b
1 changed files with 5 additions and 9 deletions
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4
derp/derp_server.go
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@ -134,7 +134,6 @@ type Server struct {
closed bool
netConns map[Conn]chan struct{} // chan is closed when conn closes
clients map[key.Public]*sclient
clientsEver map[key.Public]bool // never deleted from, for stats; fine for now
watchers map[*sclient]bool // mesh peer -> true
// clientsMesh tracks all clients in the cluster, both locally
// and to mesh peers. If the value is nil, that means the
@ -189,7 +188,6 @@ func NewServer(privateKey key.Private, logf logger.Logf) *Server {
packetsDroppedReason: metrics.LabelMap{Label: "reason"},
packetsDroppedType: metrics.LabelMap{Label: "type"},
clients: map[key.Public]*sclient{},
clientsEver: map[key.Public]bool{},
clientsMesh: map[key.Public]PacketForwarder{},
netConns: map[Conn]chan struct{}{},
memSys0: ms.Sys,
@ -361,7 +359,6 @@ func (s *Server) registerClient(c *sclient) {
go old.nc.Close()
}
s.clients[c.key] = c
s.clientsEver[c.key] = true
if _, ok := s.clientsMesh[c.key]; !ok {
s.clientsMesh[c.key] = nil // just for varz of total users in cluster
}
@ -1342,7 +1339,6 @@ func (s *Server) expVarFunc(f func() interface{}) expvar.Func {
// ExpVar returns an expvar variable suitable for registering with expvar.Publish.
func (s *Server) ExpVar() expvar.Var {
m := new(metrics.Set)
m.Set("counter_unique_clients_ever", s.expVarFunc(func() interface{} { return len(s.clientsEver) }))
m.Set("gauge_memstats_sys0", expvar.Func(func() interface{} { return int64(s.memSys0) }))
m.Set("gauge_watchers", s.expVarFunc(func() interface{} { return len(s.watchers) }))
m.Set("gauge_current_connections", &s.curClients)