Knowledge Base

Plesk installation warning: Some problems are found during create reverse DNS zone

Symptoms

The following warning was shown during Plesk Onyx installation:

PLESK_ERROR: WARNING! Some problems are found during create reverse DNS zone – there is error during utility ‘/opt/psa/admin/sbin/mk_reverse_zone’ execution, please fix the problem and run it again.(see log file: /var/log/plesk/install/plesk_17.0.17_installation.log)

Plesk installation may be failed with the following error:

Trying to create reverse DNS zone: /opt/psa/admin/sbin/mk_reverse_zone[8171]:
 Canonname is not correct fqdn. 
 It is impossible to detect the FQDN of the host. 
 Please make sure that the host name is correctly specified in /etc/hosts and goes right after the host's IP Address. 
 Depending on your OS, you might need to set the host name in /etc/HOSTNAME or /etc/hostname. 
 Terminate called after throwing an instance of 'std::runtime_error' 
 what(): Error on configure reverse DNS zone for localhost : fail to detect hostname

Server hostname is as follows:

# hostname
example

Or:

# hostname
localhost.localdomain

Cause

Hostname of the server is not a valid FQDN name.

A fully qualified domain name (FQDN), sometimes also referred to as an absolute domain name, is a domain name that specifies its exact location in the tree hierarchy of the Domain Name System (DNS).