Host registration with Red Hat Satellite is failing with the error Validation failed.

Solution Verified - Updated

Environment

  • Red Hat Satellite 6.x

Issue

  • When trying to register the host with an activation key or manually, getting the below error:

     Validation failed: Name hostname can contain only lowercase letters, numbers, dashes, and dots according to RFC921, RFC952, and RFC1123

Resolution

  • Make sure that the hostname of the host does not include any special character like underscore "_" :

        # hostname
    client1

    # hostname -f
    client1.example.com

  • Verify that subscription-manager facts also do not include a special character like underscore "_" in hostname:

     # subscription-manager facts | grep -i hostname
 network.hostname: client1

  • If the above looks good then verify file /etc/hosts on the host and make sure hostname entry should not include a special character like underscore "_" 

     # cat /etc/hosts

  • For example, there was an entry in file /etc/hosts which includes underscore "_" as below due to which getting error "Validation failed".

     xx.xxx.x.xxx	client1	client1_xyz.com	client1.example.com

For more KB articles/solutions related to Red Hat Satellite 6.x Client Subscription Issues, please refer to the Red Hat Satellite Consolidated Troubleshooting Article for Red Hat Satellite 6.x Client Subscription Issues

Root Cause

  • There was an entry in file /etc/hosts for host which includes underscore "_" in hostname due to which getting error "Validation failed" for hostname.

Diagnostic Steps

  • Make sure that there is no special character like underscore "_" in the hostname of the host which you are trying to register to the satellite server.

  • Verify subscription-manager facts generated for the host to be registered to the satellite server.

  • Check file /etc/hosts and verify if there is an entry for the hostname with special characters like underscore "_"

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