问题
Am curious about how OpenStack handles IP configuration, i have a complete working openstack dashboard with a static IP of 192.168.1.73/24 and i want to change it to something else. Running as a VM using RHEL\Scientific Linux\Centos 7.5 as the Guest Host.
Am running openstack-queens (repo) -- /etc/yum.repos.d
What i've tried and failed...
1.Changing static IP in /etc/sysconfig/network-scripts/ifcfg-eth0
2.Made sure in /etc/resolv.conf reflects my new configuration.
2.Replacing IP configuration in packstack-answerfile for the compute node and the rest of the services i've configured.
What i have noted!!!
1.systemctl status -l redis.service --- fails when i change the IP configuration, this is active (running) with its initial configuration.
2.Virtualization daemon also fails during boot--(running as KVM)
How "deep" does Networking go for OpenStack and how do i achieve my goals of setting a different IP and still have my dashboard up and running?
回答1:
This was Easy. What I missed to do is to only re-run my packstack answerfile.
First, change the IP address on the machine in /etc/sysconfig/network-scripts/ifcfg-br-ex thats if you already gone ahead in setting up networking for your OpenStack Env.
If you have done a backup of your ifcfg-eth0, revert to it and change to new IP configuration.
Second, Replace new IP configuration in packstack-answerfile for the compute node and the rest of the services configured.
Last But not Least: Requires Steady Internet Connection!!!
Last Step is to re-run your packstack-answerfile with the new IP configuration.
来源：https://stackoverflow.com/questions/54733186/single-instance-openstack-ip-network-configuration