137 lines
3.9 KiB
Markdown
137 lines
3.9 KiB
Markdown
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```bash
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#!/bin/bash
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## **Updates to this file are now at https://github.com/giovtorres/kvm-install-vm.**
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## **This updated version has more options and less hardcoded variables.**
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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 ""
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virsh destroy $1 > /dev/null
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virsh undefine $1 > /dev/null
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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=768
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# Number of virtual CPUs
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CPUS=1
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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 $1.log
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echo "$(date -R) Destroying the $1 domain (if it exists)..."
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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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# 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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# 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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# 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_svcname: ssh
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ssh_deletekeys: True
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ssh_genkeytypes: ['rsa', 'ecdsa']
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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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_EOF_
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echo "instance-id: $1; local-hostname: $1" > $META_DATA
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echo "$(date -R) Copying template image..."
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cp $IMAGE $DISK
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# Create CD-ROM ISO with cloud-init config
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echo "$(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 $CI_ISO,device=cdrom --network \
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bridge=virbr0,model=virtio --os-type=linux --os-variant=rhel7 --noautoconsole
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MAC=$(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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# 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 $CI_ISO
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echo "$(date -R) DONE. SSH to $1 using $IP with username 'centos'."
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popd > /dev/null
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``` |