Setting VM Hostname

debian112 · February 9, 2016, 2:24am

How do you set the hostname for a VM when it is deployed?

Arash · February 9, 2016, 10:11am

Till now nothing but you can create a custom context
for more information check this on github

for centos 7 :

RomanBogachev/one-context/blob/master/Centos 7/05-hostname

#!/bin/bash

CONFIG_FILE="/etc/sysconfig/network"

function set_hostname() {
    NAME=$1

    [ -n "$NAME" ] || exit 0

    sed -i '/^HOSTNAME=.*$/d' $CONFIG_FILE
    echo "HOSTNAME=$NAME" >> $CONFIG_FILE

    hostname $NAME
}

function get_dns_name() {
    first_ip=$(hostname -I | cut -d' ' -f1)
    text=$(host $first_ip)
    [ $? = 0 ] || exit 0
    [[ $text == *"has no PTR record" ]] && exit 0

This file has been truncated. show original

debian112 · February 9, 2016, 8:16pm

Ok, how would I set it up? Here is what I have?

CONTEXT=[INIT_SCRIPTS=“05-hostname”,NETWORK=“YES”,SSH_PUBLIC_KEY=“$USER[SSH_PUBLIC_KEY]”]
CPU=“1”
DISK=[IMAGE=“Debian-7-kvm”,IMAGE_UNAME=“oneadmin”]
GRAPHICS=[LISTEN=“0.0.0.0”,TYPE=“VNC”]
HYPERVISOR=“kvm”
LOGO=“images/logos/debian.png”
MEMORY=“512”
NIC=[NETWORK=“GT-100”,NETWORK_UNAME=“oneadmin”]
OS=[ARCH=“x86_64”,BOOT=“hd”]
VCPU=“4”

VURoland · February 10, 2016, 1:59am

with basic contextualization of a VM, we set the hostname using this addition to a template:

CONTEXT=[DNS_HOSTNAME="YES"]

Of course, you need to pre-define the range of hostnames in your DNS server(s) for this to work properly

debian112 · February 10, 2016, 3:00am

Thanks, I got it working with set_hostname=$name

luke.camilleri · March 18, 2018, 9:29pm

Hi @debian112 what would be the outcome if the vm name is changed from the GUI. would the vm name also changes at the OS level on next reboot?

Topic		Replies	Views
FQDN in SET_HOSTNAME Community Support	23	4628	June 2, 2020
Setting Hostname Issue Community Support	2	1175	November 16, 2016
Hostname configuration General	3	438	July 3, 2019
Dynamic Hostname Contextualization concern Community Support	0	653	June 28, 2017
Modify SET_HOSTNAME value VM Configuration / Contextualization	2	860	August 19, 2020

Setting VM Hostname

Related Topics