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141 lines
4.2 KiB
141 lines
4.2 KiB
#!/bin/bash |
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# Take one argument from the commandline: VM name |
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if ! [ $# -eq 1 ]; then |
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echo "Usage: $0 <node-name>" |
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exit 1 |
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fi |
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# Check if domain already exists |
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virsh dominfo $1 > /dev/null 2>&1 |
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if [ "$?" -eq 0 ]; then |
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echo -n "[WARNING] $1 already exists. " |
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read -p "Do you want to overwrite $1 (y/[N])? " -r |
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if [[ $REPLY =~ ^[Yy]$ ]]; then |
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echo "$(date -R) Destroying the $1 domain..." |
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# Remove domain with the same name |
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virsh destroy $1 >> $1.log 2>&1 |
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virsh undefine $1 >> $1.log 2>&1 |
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echo "$(date -R) Destroying the $1 storage pool..." |
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# Remove the associated pool |
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virsh pool-destroy $1 >> $1.log 2>&1 |
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virsh pool-undefine $1 >> $1.log 2>&1 |
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else |
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echo -e "\nNot overwriting $1. Exiting..." |
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exit 1 |
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fi |
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fi |
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# Directory to store images |
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DIR=~/virt/images |
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# Location of cloud image |
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IMAGE=$DIR/CentOS-7-x86_64-GenericCloud.qcow2 |
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# Amount of RAM in MB |
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MEM=1024 |
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# Number of virtual CPUs |
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CPUS=1 |
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# Disk Size |
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RESIZE_DISK=false |
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DISK_SIZE=20G |
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# Cloud init files |
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USER_DATA=user-data |
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META_DATA=meta-data |
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CI_ISO=$1-cidata.iso |
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DISK=$1.qcow2 |
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# Bridge for VMs (default on Fedora is virbr0) |
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BRIDGE=virbr0 |
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# Start clean |
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rm -rf $DIR/$1 |
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mkdir -p $DIR/$1 |
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pushd $DIR/$1 > /dev/null |
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# Create log file |
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touch $1.log |
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# cloud-init config: set hostname, remove cloud-init package, |
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# and add ssh-key |
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cat > $USER_DATA << _EOF_ |
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#cloud-config |
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# Hostname management |
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preserve_hostname: False |
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hostname: $1 |
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fqdn: $1.example.local |
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# Configure where output will go |
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output: |
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all: ">> /var/log/cloud-init.log" |
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# configure interaction with ssh server |
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ssh_genkeytypes: ['ed25519', 'rsa'] |
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# Install my public ssh key to the first user-defined user configured |
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# in cloud.cfg in the template (which is centos for CentOS cloud images) |
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ssh_authorized_keys: |
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- ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDBil2QzORhDcnKiVVNpO5daOSYVp8nshcIc7aTEkdlqCRir2Oni8BEStK7x7bvh0jrp9KptlHPeos87fQs//VXEb1FEprL2c6fPWmVdtjmYw3yzSkaFKMksL7FdUoEiwF6t8pQAg2mU0Qj9emSHBKg5ttdGqNoSvXc92k7iOzgauda7jdNak+Dx9dPhR3FJwHMcZSlQHO4cweZcK63bZitxlFkJ/FJdry/TBirDhRcXslOJ3ECU2xiyRXJVPs3VNLjMdOTTAoMmZj+GraUBbQ9VIqe683xe02sM83th5hj2C4gW3qXUoFkNLfKAMRxXLRMEwI3ABFB/AAUhACxyTJp giovanni@throwaway |
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# Remove cloud-init when finished with it |
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#runcmd: |
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# - [ yum, -y, remove, cloud-init ] |
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_EOF_ |
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echo "instance-id: $1; local-hostname: $1" > $META_DATA |
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echo "$(date -R) Copying cloud image..." |
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cp $IMAGE $DISK |
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if $RESIZE_DISK |
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then |
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echo "$(date -R) Resizing the disk to $DISK_SIZE..." |
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qemu-img create -f qcow2 -o preallocation=metadata $DISK.new $DISK_SIZE >> $1.log 2>&1 |
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virt-resize --quiet --expand /dev/sda1 $DISK $DISK.new >> $1.log 2>&1 |
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mv $DISK.new $DISK |
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fi |
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# Create CD-ROM ISO with cloud-init config |
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echo "$(date -R) Generating ISO for cloud-init..." |
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genisoimage -output $CI_ISO -volid cidata -joliet -r $USER_DATA $META_DATA &>> $1.log |
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echo "$(date -R) Installing the domain and adjusting the configuration..." |
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echo "[INFO] Installing with the following parameters:" |
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echo " virt-install --import --name $1 --ram $MEM --vcpus $CPUS --disk \ |
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$DISK,format=qcow2,bus=virtio --disk $CI_ISO,device=cdrom --network \ |
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bridge=virbr0,model=virtio --os-type=linux --os-variant=rhel7 --noautoconsole" |
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virt-install --import --name $1 --ram $MEM --vcpus $CPUS --disk \ |
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$DISK,format=qcow2,bus=virtio --disk $CI_ISO,device=cdrom --network \ |
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bridge=virbr0,model=virtio --os-type=linux --os-variant=rhel7 --noautoconsole |
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virsh dominfo $1 >> $1.log 2>&1 |
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# Eject cdrom |
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echo "$(date -R) Cleaning up cloud-init..." |
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virsh change-media $1 hda --eject --config >> $1.log |
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# Remove the unnecessary cloud init files |
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rm $USER_DATA $META_DATA $CI_ISO |
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MAC=$(virsh dumpxml $1 | awk -F\' '/mac address/ {print $2}') |
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while true |
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do |
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IP=$(grep -B1 $MAC /var/lib/libvirt/dnsmasq/$BRIDGE.status | head \ |
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-n 1 | awk '{print $2}' | sed -e s/\"//g -e s/,//) |
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if [ "$IP" = "" ] |
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then |
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sleep 1 |
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else |
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break |
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fi |
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done |
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echo "$(date -R) DONE. SSH to $1 using $IP with username 'centos'." |
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popd > /dev/null
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