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

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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?

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Setting VM Hostname

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