openstack/manila
Code Issues Proposed changes

Change ssh_utils parameter to correctly send keepalive packets

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The current implementation of ssh_utils never sends keepalive packets.
In ssh_utils.SSHPool, the socket timeout parameter is set to None
intending to keep ssh connections open.
However, when the parameter is set to None, ssh_utils does not run the
code to compare idle duration and keepalive interval.

This patch reverts the socket timeout parameter to default (0.1 sec).
The ssh_utils compares them every 0.1 seconds, and sends a keepalive
packet if idle duration > keepalive interval (= self.conn_timeout).

See cinder change: I8234083107207b9ebc0849947e8de92b5cf3e36e

Change-Id: Ib13e5c6246412d667554cb0bd9c419b513af70c7
Related-Bug: #1673662
(cherry picked from commit 1814ad4113)
(cherry picked from commit 742e30922b)
This commit is contained in:
Tom Barron 2018-12-29 21:35:53 -06:00
parent 041f60a7b0
commit 674ee3fe03
1 changed files with 0 additions and 8 deletions
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8
manila/utils.py
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@ -150,16 +150,8 @@ class SSHPool(pools.Pool):
look_for_keys=look_for_keys,
timeout=self.conn_timeout,
banner_timeout=self.conn_timeout)
# Paramiko by default sets the socket timeout to 0.1 seconds,
# ignoring what we set through the sshclient. This doesn't help for
# keeping long lived connections. Hence we have to bypass it, by
# overriding it after the transport is initialized. We are setting
# the sockettimeout to None and setting a keepalive packet so that,
# the server will keep the connection open. All that does is send
# a keepalive packet every ssh_conn_timeout seconds.
if self.conn_timeout:
transport = ssh.get_transport()
transport.sock.settimeout(None)
transport.set_keepalive(self.conn_timeout)
return ssh
except Exception as e: