April 2017
Intermediate to advanced
470 pages
11h 12m
English
Content preview from Mastering OpenStack - Second Edition
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Services should listen
Running services properly in OpenStack depends on which port each process should listen to. For example, starting the identity service can return the following error message:
keystone error: [Error 98] Address already in use
This error message refers to a misconfiguration in the Keystone service file and must be revised. In fact, the identity service socket listens by default on port 5000, which can be occupied by another application or process. This typical issue can be tackled by checking which port is configured in each OpenStack configuration file and double-checked using friendly command line tools such as lsof or netstat. For example:
# lsof -i :5000
or:
# netstat -ant | grep 5000tcp6 0 0 :::5000 :::* LISTEN ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.