Your error message says it cannot connect to port 23750.  That's the 
kuryr-libnetwork default listen port.  On, run:

lsof -iTCP -sTCP:LISTEN -P

On my compute node, it outputs:

kuryr-ser 1976        root    6u  IPv4  30896      0t0  TCP localhost:23750 

So, you can see that kuryr is listening on 23750.  If lsof does not list a 
process listening on 23750, then check if kuryr is up by running:

systemctl status kuryr-libnetwork

You can also try restarting it by running:

systemctl restart kuryr-libnetwork

I installed that service by following:

That is the queens install guide which might help you since zun has no install 
guide in pike.

If you see it listening, you can try this command:

telnet 23750

If it fails to connect, then try:

telnet localhost 23750

If it works with localhost but not, then I think that means you 
need to tell docker to connect to localhost instead of

Can you get the commands at the following web page to succeed?

Jacob Burckhardt
Senior Software Engineer

From: Rania Adouni <>
Sent: Tuesday, November 20, 2018 2:02 PM
Subject: [openstack-dev] [zun] Failed to create Container


Hi ,

I am starting to use zun on openstack pike , and when I try to lunch container 
with cirros image , I get this reason : Docker internal error: 500 Server 
Error: Internal Server Error ("legacy plugin: Post dial tcp<>: connect: connection refused").
you can find here the log on my compute node :
some help with this will be great .
Best Regards,
Rania Adouni

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