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Description of problem:
hostnamectl set-hostname fail to set a new hostname has 63 characters
While it works with 62 or 64 characters new hostname
63 characters fail
# hostnamectl set-hostname CUSTVM-89012345678901234567890123456789012345678901234567890123.vmware.com
Could not set property: Invalid static hostname 'custvm-89012345678901234567890123456789012345678901234567890123.'
64 characters pass
# hostnamectl set-hostname CUSTVM-890123456789012345678901234567890123456789012345678901234.vmware.com
62 characters pass
# hostnamectl set-hostname CUSTVM-8901234567890123456789012345678901234567890123456789012.vmware.com
Version-Release number of selected component (if applicable):
# cat /etc/os-release
NAME="Red Hat Enterprise Linux Server"
VERSION="7.6 (Maipo)"
ID="rhel"
ID_LIKE="fedora"
VARIANT="Server"
VARIANT_ID="server"
VERSION_ID="7.6"
PRETTY_NAME="Red Hat Enterprise Linux Server 7.6 Beta (Maipo)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:redhat:enterprise_linux:7.6:beta:server"
HOME_URL="https://www.redhat.com/"
BUG_REPORT_URL="https://bugzilla.redhat.com/"
REDHAT_BUGZILLA_PRODUCT="Red Hat Enterprise Linux 7"
REDHAT_BUGZILLA_PRODUCT_VERSION=7.6
REDHAT_SUPPORT_PRODUCT="Red Hat Enterprise Linux"
REDHAT_SUPPORT_PRODUCT_VERSION="7.6 Beta"
This is caused by hostname shortening AFTER cleanup, which results in a trailing dot in the static hostname in specific cases, thus resulting in an invalid hostname. This should be fixed by this patch[0], which does the shortening BEFORE the cleanup.
[0] https://github.com/systemd/systemd/commit/46e1a2278116e2f5067c35127ccbd8589335f734
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.
https://access.redhat.com/errata/RHSA-2019:2091