I am trying to create a template in cloudstack but /etc/hostname and /etc/hosts is not set when creating a new VM instance.
I am using this script:
#!/bin/sh
# dhclient change hostname script for Ubuntu
oldhostname=$(hostname -s)
if [ $oldhostname = 'localhost' ]
then
sleep 30 # Wait for configuration to be written to disk
hostname=$(cat /var/lib/dhcp/dhclient.eth0.leases | awk ' /host-name/ { host = $3 } END { printf host } ' | sed 's/[";]//g' )
fqdn="$hostname.$(cat /var/lib/dhcp/dhclient.eth0.leases | awk ' /domain-name/ { domain = $3 } END { printf domain } ' | sed 's/[";]//g')"
ip=$(cat /var/lib/dhcp/dhclient.eth0.leases | awk ' /fixed-address/ { lease = $2 } END { printf lease } ' | sed 's/[";]//g')
echo "cloudstack-hostname: Hostname _localhost_ detected. Changing hostname and adding hosts."
printf " Hostname: $hostname\n FQDN: $fqdn\n IP: $ip"
echo "Hostname: $hostname\n FQDN: $fqdn\n IP: $ip" >> "/var/log/hostchange"
# Update /etc/hosts
echo "$ip $fqdn $hostname" > /etc/hosts.dhcp.tmp
#awk -v i="$ip" -v f="$fqdn" -v h="$hostname" "/^127/{x=1} !/^127/ && x { x=0; print i,f,h; } { print $0; }" /etc/hosts > /etc/hosts.dhcp.tmp
mv /etc/hosts /etc/hosts.dhcp.bak
mv /etc/hosts.dhcp.tmp /etc/hosts
# Rename Host
echo $hostname > /etc/hostname
hostname -b -F /etc/hostname
echo $hostname > /proc/sys/kernel/hostname
# Recreate SSH2
export DEBIAN_FRONTEND=noninteractive
dpkg-reconfigure openssh-server
fi
### End of Script ###
When I set the hostname to localhost and do a reboot everything works.
When I create a new instance it doesn't work: the hostname of the previous VM is used (the VM I used to create the template)
When I run rm -f /var/lib/dhcp/dhclient.* before I create the template the hostname will be blank. But in the lease file is the right data.
