Dear OpenVZ users,
I've got a questions concerning RHE7/CENTOS7 containers and the change in the
script "/etc/vz/dists/scripts/redhat-set_hostname.sh" which comes with the
newer versions of vzctl-core...
function set_hostname()
{
local cfgfile="$1"
local var=$2
local val=$3
[ -z "${val}" ] && return 0
if [ -f /etc/hostname ]; then
# New style: RHEL7/Fedora15+
# Note hostname(5) says it should NOT be FQDN
val=${val%%.*}
echo "$val" > /etc/hostname
else
# "Classic" style
put_param "${cfgfile}" "${var}" "${val}"
fi
hostname "${val}"
}
change_hostname /etc/hosts "${HOSTNM}" "${IP_ADDR}"
We've got some CENTOS7 containers for testing (running on Hardware with rhel6
openvz kernel at the moment) The hostname which should be FQDN in our
environment is set to short hostname all the time. This happens because the
file/etc/hostname exists in Centos 7.
The redhat-set_hostname.sh script changes our entry /etc/hostname to short
hostname...
When I read the man pages of my COS 7.1.1503 Container, I don't see any entry
saying that hostname should not be FQDN....
Hostname(5) says that it is recommended but, not that it is a strict
requirement...
DESCRIPTION
The /etc/hostname file configures the name of the local system that is
set during boot using the sethostname(2) system call. It should contain a
single newline-terminated hostname string. The
hostname may be a free-form string up to 64 characters in length;
however, it is recommended that it consists only of 7-bit ASCII lower-case
characters and no spaces or dots, and limits itself to
the format allowed for DNS domain name labels, even though this is not a
strict requirement.
Hostname(1) says the following...
FILES
/etc/hostname Historically this file was supposed to only contain the
hostname and not the full canonical FQDN. Nowadays most software is able to
cope with a full FQDN here. This file is read at
boot time by the system initialization scripts to set the hostname.
So why do you prevent users from setting their hostname to fqdn-hostname with
the change of the script above?
Greetings, Sabine
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