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I have an OpenStack cloud and added the CentOS-7-x86_64-GenericCloud-1503 image and it boots just fine, but I do not know how to login. What is the root password? How can I set it? Is there some other account I need to use?

Thanks

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The default username for the CentOS 7 cloud image is centos. There is no password; instead you log in with the ssh key you provided at instance creation. You can then sudo and do whatever you like.

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If you downladed the GenericCloud image from cloud.centos.org, it does not have any users created. You can change the root password using virt-customize from libguestfs-tools package:

# virt-customize -a image_name.qcow2 --root-password password:your.great.password

Just keep in mid that this is not secure. After you login as root, you should create a sudo user, set up key-based authentication for ssh, disable root login, etc.

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  • Hi, I have tried both ways as mentioned with username centos and no password and changed password with virt-customize but still, I am unable to login to the instance created in OpenStack. I am using CentOS-7-x86_64-GenericCloud.qcow2 image. Any suggestion?
    – Sandeep
    May 21 at 5:30

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