update-vm

#!/bin/bash
# base ceph template will be registered - localhost.localdomain
# 8.4 with perl installed
# on the network with 192.168.56.250

if [ "$1" == "" ]; then
    echo "usage :  update-ceph <template: rhel79|rhel84_rhel86> <new name> <new ip>"
    echo "usage :  update-ceph cloned <new name> <new ip> -- for manually cloned vm"
    exit;
fi
if [ "$1" != "cloned" ]; then

    #first param will be the template name
    case "$1" in
        "rhel79")
            template=rhel79-template
        ;;
        "rhel84")
            template=rhel84-template
        ;;
        "rhel86")
            template=rhel86-template
            ;;
        *)
            echo "Unknown template $1"
            exit;
        ;;
    esac


    # validate $1
    virsh list --all |grep template |grep $1 > /dev/null
    if [ "$?" == "1" ]; then
        echo "Template $1 does not exist. Templates should have dashes and not _"
        exit
    fi

    echo $2 |grep '_' > /dev/null
    if [ "$?" == "0" ]; then
        echo "destination VM names should have dashes and not _"
        exit
    fi

    echo "clone template $template to $2"
    clonevm  $template $2
    sleep 10

    echo "Starting clone $2"
    virsh start $2
    sleep 60

else

    grep $2 /etc/hosts > /dev/null
    if [ "$?" == "1" ]; then
        echo "Please add $2 to /etc/hosts manually first"
        exit;
    else
        echo "skipping the cloning, using already cloned vm $2"
    fi

    virsh list |grep $2 |grep running
    if [ "$?" == "1" ];  then
        echo "Starting clone $2"
        virsh start $2
        sleep 60
    fi

fi

# run this script
ssh-keygen -R "ceph-template"
ssh-copy-id -f -o StrictHostKeyChecking=no  ceph-template
echo "Changing hostname to $2"
# change the hostname
ssh ceph-template hostname
ssh ceph-template hostnamectl set-hostname $2.example.com
ssh ceph-template hostname


if [ "$1" != "cloned" ]; then
    echo "$3 $2.example.com $2" | sudo tee -a /etc/hosts
    IP=$3
else
    echo "skipping adding $2 to hosts"
    IP=$(grep $2 /etc/hosts |awk '{print $1}')
fi
# change the IP address
echo changing IP to $IP
ssh ceph-template perl -i -p -e "s/192.168.56.250/$IP/g" /etc/sysconfig/network-scripts/ifcfg-e*0
ssh ceph-template reboot