simple kvm builder using cloud images
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global/overlay/usr/local/sbin/cosmos_vm
Executable file
124
global/overlay/usr/local/sbin/cosmos_vm
Executable file
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#!/bin/bash
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set -- $(getopt h?H:D?s:B:M:C:R:i:g:n:I:G:N: "$@")
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src_image=""
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size="1G"
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dhcp="no"
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hostname="default"
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bridge="br0"
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cpus="1"
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mem="1024"
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repo="git://code.mnt.se/mnt-cosmos.git"
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tag="eduid-cosmos"
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ip=""
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gateway=""
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netmask=""
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resolver=""
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ip6=""
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gateway6=""
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netmask6="64"
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while [ $# -gt 0 ]; do
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case "$1" in
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(-h) echo "Usage: $0 [-h] [-H hostname] [-M <memory>] [-C <#cpus>] [-B <bridge>] [-D (dhcp)] [-i/-I <ip4/6>] [-n/-N <mask4/6>] [-g/-G <gw4/6>] [-R <resolver(s)>] [-s <src image>]"; exit 0;;
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(-H) hostname="$2"; shift;;
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(-s) src_image="$2"; shift;;
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(-D) dhcp="yes" ;;
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(-S) size="$2"; shift;;
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(-B) bridge="$2"; shift;;
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(-M) mem="$2"; shift;;
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(-C) cpus="$2"; shift;;
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(-R) resolver="$2"; shift;;
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(-i) ip="$2"; shift;;
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(-g) gateway="$2"; shift;;
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(-n) netmask="$2"; shift;;
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(-I) ip6="$2"; shift;;
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(-G) gateway6="$2"; shift;;
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(-N) netmask6="$2"; shift;;
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(--) shift; break;;
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(-*) echo "Unknown option $1\nUsage: $0 [-h] [-H hostname] [-M <memory>] [-C <#cpus>] [-B <bridge>] [-D (dhcp)] [-i/-I <ip4/6>] [-n/-N <mask4/6>] [-g/-G <gw4/6>] [-R <resolver(s)>] [-s <src image>]"; exit 1;;
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(*) break;;
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esac
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shift
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done
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id=$(uuidgen)
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seed=${id}_seed.img
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disk=${id}.img
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rm -f ${seed}
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truncate --size 2M ${seed}
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mkfs.vfat -n cidata ${seed} 2>/dev/null
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user_data=$(mktemp)
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cat > ${user_data} <<EOF
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#cloud-config
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password: ubuntu
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chpasswd: { expire: False }
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ssh_pwauth: True
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ssh_authorized_keys:
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- ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDVvB4gdJ6EWRmx8xUSxrhoUNnWxEf8ZwAqhzC1+7XBY/hSd/cbEotLB9gxgqt0CLW56VU4FPLTw8snD8tgsyZN6KH1Da7UXno8oMk8tJdwLQM0Ggx3aWuztItkDfBc3Lfvq5T07YfphqJO7rcSGbS4QQdflXuOM9JLi6NStVao0ia4aE6Tj68pVVb3++XYvqvbU6NtEICvkTxEY93YpnRSfeAi64hsbaqSTN4kpeltzoSD1Rikz2aQFtFXE03ZC48HtGGhdMFA/Ade6KWBDaXxHGARVQ9/UccfhaR2XSjVxSZ8FBNOzNsH4k9cQIb2ndkEOXZXnjF5ZjdI4ZU0F+t7 leifj+00060AD478D6@sunet.se
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runcmd:
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- ["mkdir","/tmp/seed"]
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- ["mount","/dev/vdb","/tmp/seed"]
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- ["cp","/tmp/seed/bootstrap-cosmos.sh","/tmp/seed/cosmos_1.2-2_all.deb","/root"]
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- ["cd","/root"]
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- "cd /root && /root/bootstrap-cosmos.sh ${hostname} ${repo} ${tag}"
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EOF
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meta_data=$(mktemp)
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cat > ${meta_data} <<EOF
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#cloud-config
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instance-id: iid-${id}
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local-hostname: ${hostname}
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EOF
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if [ "x${dhcp}" = "xyes" ]; then
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cat >> ${meta_data} <<EOF
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network-interfaces: |
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auto eth0
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iface eth0 inet dhcp
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EOF
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else
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if [ "x${ip}" != "x" ]; then
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cat >> ${meta_data} <<EOF
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network-interfaces: |
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auto eth0
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iface eth0 inet static
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address ${ip}
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netmask ${netmask}
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gateway ${gateway}
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dns-nameservers ${resolver}
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EOF
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fi
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if [ "x${ip6}" != "x" ]; then
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cat >> ${meta_data} <<EOF
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network-interfaces: |
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auto eth0
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iface eth0 inet6 static
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address ${ip6}
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netmask ${netmask6}
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gateway ${gateway6}
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dns-nameservers ${resolver}
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EOF
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fi
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fi
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mcopy -i ${seed} ${user_data} ::user-data 2>/dev/null
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mcopy -i ${seed} ${meta_data} ::meta-data 2>/dev/null
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mcopy -i ${seed} /etc/cosmos/apt/bootstrap-cosmos.sh /etc/cosmos/apt/cosmos_1.2-2_all.deb ::
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mv ${seed} /var/lib/libvirt/images/
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virsh pool-refresh default
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virsh vol-clone --pool default ${src_image} ${disk}
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virt-install -r ${mem} -n ${hostname} --vcpus=${cpus} --autostart --memballoon virtio --network bridge=${bridge} --boot hd --disk vol=default/${disk},format=qcow2,bus=virtio --disk vol=default/${seed},bus=virtio
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rm -f ${user_data}
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rm -f ${meta_data}
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