Stuck on an issue?

Lightrun Answers was designed to reduce the constant googling that comes with debugging 3rd party libraries. It collects links to all the places you might be looking at while hunting down a tough bug.

And, if you’re still stuck at the end, we’re happy to hop on a call to see how we can help out.

SSHAdapter pool_connections too big

See original GitHub issue

docker-compose has an issue when connecting to a remote daemon over SSH.

docker-py sets the number of connections to 25 which is a problem since sshd defines MaxSessions to 10 by default.

My questions:

why is the default so high in docker-py?
could docker-py set it to lower by default for the SSH transport so that it works out of the box with an ssh server with default configuration?

In my tests I had to put the limit (num_pools argument for ApiClient) to 9, there must be an off-by-one error somewhere in there…

Issue Analytics

State:
Created 5 years ago
Comments:6 (4 by maintainers)

Top GitHub Comments

1reaction

shin-commented, Jan 29, 2019

I think that’s due to DEFAULT_NUM_POOLS. 25 is fine for everything else.

Maybe as a quick fix, we can hard-set the num_pools for the SSH transport to (9/10), then look at making it configurable later.

0reactions

ijccommented, Jan 30, 2019

I wonder – could it be counting the underlying network connection as one, then allowing 9 additional sessions on top (essentially meaning the first sessions counts as two)?