OpenStack FAQ¶
FAQ for OpenStack instance e.g. why network on my instance does not work ?
Q: I have launched an Ubuntu instance but I am not able to ssh into the system. I have tried on Windows and Ubuntu host OSs, but I am getting the “Connection Timed Out” error.
A: For accessing the instances from outside world, you need to make sure you have followed these steps:
- Your public ssh-key selected (in access and security section) while launching the instance so that you can use it to ssh to the instance.
- Assign floating-ip to the instance in order to access it from outside world.
- Make sure you have added rules in the security-groups to allow ssh to the instance.
A common issue is to not using a floating-ip to access the instance. You can associate a floating-ip to the instance by clicking “assign floating ip” and then clicking the “+” icon to allocate one if its not available.
Q: Unable to perform “sudo yum update” on CentOS user i.e the “Colud not retrieve mirror list” error is thrown.
A: This mostly because the DNS server is not mentioned under the Subnet details.
- Go to Network -> Networks, Now click on the network that you setup while creating the instance.
- Clicking on the network name will take you to page titled “Network Overview”
- On this page find the Subnets section and click on the “Edit Subnets” action button.
- Click on the “Subnet Details” section of the dialog that opens.
- Enter a DNS Name Server - 8.8.8.8
- Save the changes.
Q: Why do I see too much connection-drop errors? Is there a solution for it?
