tree 8c2b619c131f4c9926c49d171933e07024dce494
parent 1fe62a816658493a0298d7793034156f11cd6045
author Dennis Dmitriev <ddmitriev@mirantis.com> 1528079684 +0300
committer Dennis Dmitriev <ddmitriev@mirantis.com> 1528080332 +0300
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Set keepalive interval for paramiko SSHClient

If the ssh server has set the option ClientAliveInterval, it will
send an 'empty' packet to a client and closes the connection if
the client is not responding.
Looks like paramiko ignores such keepalive packages from server.

But paramiko has an option similar to ServerAliveInterval, which
allows to send an 'empty' package from the client to the server,
so the server will never reach it's own timeout
for ClientAliveInterval, and the connection won't be closed.

- export SSH_SERVER_ALIVE_INTERVAL=60 # 60 is default, 0 to disable
- remove workarounds for ClientAliveInterval. If the platform set
  this value to 300 for all nodes, the same timeouts may
  happen inside the platform between different components
  and should be catched by the tests in that case.

Change-Id: I552cb7fdca59b51a3fc0e9e7d2cff7f28cb444dc