cloud-init config creator

create_config_iso.sh

# Bridge for VMs (default on Fedora is virbr0)
BRIDGE=virbr0

# Cloud init files
USER_DATA=user-data
META_DATA=meta-data
CI_ISO=$1-cidata.iso

# cloud-init config: set hostname, remove cloud-init package,
# and add ssh-key 
cat > $USER_DATA << _EOF_
#cloud-config

# Hostname management
preserve_hostname: False
hostname: $1
fqdn: $1.example.local

# Remove cloud-init when finished with it
runcmd:
  - [ yum, -y, remove, cloud-init ]

# Configure where output will go
output: 
  all: ">> /var/log/cloud-init.log"

# configure interaction with ssh server
ssh_svcname: ssh
ssh_deletekeys: True
ssh_genkeytypes: ['rsa', 'ecdsa']

# Install my public ssh key to the first user-defined user configured 
# in cloud.cfg in the template (which is centos for CentOS cloud images)
ssh_authorized_keys:
  - ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDBil2QzORhDcnKiVVNpO5daOSYVp8nshcIc7aTEkdlqCRir2Oni8BEStK7x7bvh0jrp9KptlHPeos87fQs//VXEb1FEprL2c6fPWmVdtjmYw3yzSkaFKMksL7FdUoEiwF6t8pQAg2mU0Qj9emSHBKg5ttdGqNoSvXc92k7iOzgauda7jdNak+Dx9dPhR3FJwHMcZSlQHO4cweZcK63bZitxlFkJ/FJdry/TBirDhRcXslOJ3ECU2xiyRXJVPs3VNLjMdOTTAoMmZj+GraUBbQ9VIqe683xe02sM83th5hj2C4gW3qXUoFkNLfKAMRxXLRMEwI3ABFB/AAUhACxyTJp giovanni@throwaway
_EOF_

echo "instance-id: $1; local-hostname: $1" > $META_DATA

# Create CD-ROM ISO with cloud-init config
echo "$(date -R) Generating ISO for cloud-init..."
genisoimage -output $CI_ISO -volid cidata -joliet -r $USER_DATA $META_DATA &>> $1.log