/etc/one-context.d/05-hostname is in opennebula-context 4.8.1-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 | #!/bin/bash
CONFIG_FILE="/etc/hostname"
function set_hostname() {
NAME=$1
[ -n "$NAME" ] || exit 0
echo $NAME > $CONFIG_FILE
hostname $NAME
}
function get_dns_name() {
first_ip=$(hostname -I | cut -d' ' -f1)
text=$(host $first_ip)
[ $? = 0 ] || exit 0
[[ $text == *"has no PTR record" ]] && exit 0
name=$(echo "$text" | awk '{print $(NF)}' | sed 's/\.$//')
echo $name
}
if [ -n "$SET_HOSTNAME" ]; then
set_hostname $SET_HOSTNAME
elif [ -n "$DNS_HOSTNAME" ]; then
set_hostname $(get_dns_name)
fi
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