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bitbake: asyncrpc: Add TCP Keep Alives

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Adds TCP Keep Alive support to the async RPC server. This should help
prevent file descriptor exhaustion on the server when client connections
are interrupted and the socket never closes (e.g. no FIN is sent from
the client).

A keep alive is sent after 30 seconds of inactivity, then every 15
seconds after that up to a maximum of 2 minutes.

(Bitbake rev: 68f4ce662cad28fed739900addbdee949ad3c1e8)

Signed-off-by: Joshua Watt <JPEWhacker@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
This commit is contained in:
Joshua Watt
2022-07-19 13:36:53 -05:00
committed by Richard Purdie
parent 33ff9b7d13
commit 23d8501adc
1 changed files with 7 additions and 0 deletions
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7
bitbake/lib/bb/asyncrpc/serv.py
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@@ -151,6 +151,13 @@ class AsyncServer(object):
s.setsockopt(socket.SOL_TCP, socket.TCP_NODELAY, 1)
s.setsockopt(socket.SOL_TCP, socket.TCP_QUICKACK, 1)
# Enable keep alives. This prevents broken client connections
# from persisting on the server for long periods of time.
s.setsockopt(socket.SOL_SOCKET, socket.SO_KEEPALIVE, 1)
s.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPIDLE, 30)
s.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPINTVL, 15)
s.setsockopt(socket.IPPROTO_TCP, socket.TCP_KEEPCNT, 4)
name = self.server.sockets[0].getsockname()
if self.server.sockets[0].family == socket.AF_INET6:
self.address = "[%s]:%d" % (name[0], name[1])