9521f6a9b2
Adding updates to the VM creation steps to hopefully allow for CentOS test VMs to be able to be fired up. Also refactors basic OS support for the module to be more flexible by loading defaults from files. Change-Id: Ie4456d199dd3d965e533070f4321f50075dfe1df
245 lines
7.2 KiB
Bash
Executable File
245 lines
7.2 KiB
Bash
Executable File
#!/bin/bash
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#############################################################################
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# create_nodes.sh - Script to create VM nodes for use with Ironic.
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#
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# PURPOSE
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# This script can be used to create VM instances without an operating
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# system and that are ready for netbooting. They are connected to the
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# bridge named 'brbm' (created if it does not exist).
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#
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# EXAMPLE USAGE
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# # Use defaults - Create a single node with base name of 'testvm'
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# sudo create_nodes.sh
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#
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# # Create 5 nodes
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# sudo NODECOUNT=5 create_nodes.sh
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#
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# # Create 3 nodes with base name of 'junk'
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# sudo NODEBASE=junk NODECOUNT=3 create_nodes.sh
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#
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# THANKS
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# Thanks to the author(s) of the Ironic supporting code within devstack,
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# from which all of this is derived.
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#
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# AUTHOR
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# David Shrewsbury (shrewsbury.dave@gmail.com)
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#############################################################################
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set -e # exit immediately on command error
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set -u # treat unset variables as error when substituting
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LIBVIRT_CONNECT_URI=${LIBVIRT_CONNECT_URI:-"qemu:///system"}
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export VIRSH_DEFAULT_CONNECT_URI="$LIBVIRT_CONNECT_URI"
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# VM specs
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VM_EMULATOR=${VM_EMULATOR:-/usr/bin/qemu-system-x86_64}
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VM_CPU=${VM_CPU:-1}
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VM_RAM=${VM_RAM:-3072}
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VM_DISK=${VM_DISK:-10}
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VM_MACHINE="pc-1.0"
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# CentOS provides a single emulator package
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# which differs from other distributions, and
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# needs to be explicitly set.
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if [ -e /etc/centos-release ]; then
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VM_EMULATOR=/usr/libexec/qemu-kvm
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VM_MACHINE="pc"
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fi
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# VM network
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VM_NET_BRIDGE=${VM_NET_BRIDGE:-default}
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# VM logging directory
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VM_LOGDIR=/var/log/libvirt/baremetal_logs
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#############################################################################
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# FUNCTION
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# create_node
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#
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# PARAMETERS
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# $1: Virtual machine name
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# $2: Number of CPUs for the VM
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# $3: Amount of RAM for the VM
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# $4: Disk size (in GB) for the VM
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# $5: CPU architecture (i386 or amd64)
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# $6: Network bridge for the VMs
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# $7: Path to VM emulator
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# $8: Logging directory for the VMs
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#############################################################################
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function create_node {
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NAME=$1
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CPU=$2
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MEM=$(( 1024 * $3 ))
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# extra G to allow fuzz for partition table : flavor size and registered size
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# need to be different to actual size.
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DISK=$(( $4 + 1))
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case $5 in
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i386) ARCH='i686' ;;
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amd64) ARCH='x86_64' ;;
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*) echo "Unsupported arch $5!" >&2; exit 1 ;;
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esac
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BRIDGE=$6
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EMULATOR=$7
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LOGDIR=$8
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LIBVIRT_NIC_DRIVER=${LIBVIRT_NIC_DRIVER:-"e1000"}
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LIBVIRT_STORAGE_POOL=${LIBVIRT_STORAGE_POOL:-"default"}
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LIBVIRT_CONNECT_URI=${LIBVIRT_CONNECT_URI:-"qemu:///system"}
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if ! virsh pool-list --all | grep -q $LIBVIRT_STORAGE_POOL; then
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virsh pool-define-as --name $LIBVIRT_STORAGE_POOL dir --target /var/lib/libvirt/images >&2
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virsh pool-autostart $LIBVIRT_STORAGE_POOL >&2
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virsh pool-start $LIBVIRT_STORAGE_POOL >&2
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fi
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pool_state=$(virsh pool-info $LIBVIRT_STORAGE_POOL | grep State | awk '{ print $2 }')
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if [ "$pool_state" != "running" ] ; then
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[ ! -d /var/lib/libvirt/images ] && mkdir /var/lib/libvirt/images
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virsh pool-start $LIBVIRT_STORAGE_POOL >&2
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fi
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if [ -n "$LOGDIR" ] ; then
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mkdir -p "$LOGDIR"
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if [ -e /etc/centos-release ]; then
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# NOTE(TheJulia): For some unknown reason, libvirt's log folder permissions
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# on CentOS ship in an inoperable state. Users must be able to read a folder
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# to open files in the folder structure.
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chmod o+rx "$LOGDIR/.."
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fi
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fi
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PREALLOC=
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if [ -f /etc/debian_version ]; then
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PREALLOC="--prealloc-metadata"
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fi
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VM_LOGGING="$LOGDIR/${NAME}_console.log"
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VOL_NAME="${NAME}.qcow2"
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if ! virsh list --all | grep -q $NAME; then
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virsh vol-list --pool $LIBVIRT_STORAGE_POOL | grep -q $VOL_NAME &&
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virsh vol-delete $VOL_NAME --pool $LIBVIRT_STORAGE_POOL >&2
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virsh vol-create-as $LIBVIRT_STORAGE_POOL ${VOL_NAME} ${DISK}G --format qcow2 $PREALLOC >&2
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volume_path=$(virsh vol-path --pool $LIBVIRT_STORAGE_POOL $VOL_NAME)
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# Pre-touch the VM to set +C, as it can only be set on empty files.
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touch "$volume_path"
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# NOTE(TheJulia): CentOS default installs with an XFS root, and chattr
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# fails to set +C on XFS. This could be more elegent, however the use
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# case is for CI testing.
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if [ ! -e /etc/centos-release ]; then
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chattr +C "$volume_path" || true
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fi
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vm_xml="
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<domain type='qemu'>
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<name>${NAME}</name>
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<memory unit='KiB'>${MEM}</memory>
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<vcpu>${CPU}</vcpu>
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<os>
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<type arch='${ARCH}' machine='${VM_MACHINE}'>hvm</type>
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<boot dev='network'/>
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<bootmenu enable='no'/>
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<bios useserial='yes'/>
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</os>
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<features>
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<acpi/>
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<apic/>
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<pae/>
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</features>
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<clock offset='utc'/>
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<on_poweroff>destroy</on_poweroff>
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<on_reboot>restart</on_reboot>
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<on_crash>restart</on_crash>
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<devices>
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<emulator>${EMULATOR}</emulator>
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<disk type='file' device='disk'>
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<driver name='qemu' type='qcow2' cache='writeback'/>
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<source file='${volume_path}'/>
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<target dev='vda' bus='virtio'/>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x06' function='0x0'/>
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</disk>
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<controller type='ide' index='0'>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x01' function='0x1'/>
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</controller>
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<interface type='network'>
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<source network='${BRIDGE}'/>
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</interface>
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<input type='mouse' bus='ps2'/>
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<graphics type='vnc' port='-1' autoport='yes'/>
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<video>
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<model type='cirrus' vram='9216' heads='1'/>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x02' function='0x0'/>
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</video>
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<serial type='file'>
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<source path='${VM_LOGGING}'/>
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<target port='0'/>
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<alias name='serial0'/>
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</serial>
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<serial type='pty'>
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<source path='/dev/pts/49'/>
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<target port='1'/>
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<alias name='serial1'/>
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</serial>
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<console type='file'>
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<source path='${VM_LOGGING}'/>
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<target type='serial' port='0'/>
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<alias name='serial0'/>
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</console>
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<memballoon model='virtio'>
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<address type='pci' domain='0x0000' bus='0x00' slot='0x07' function='0x0'/>
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</memballoon>
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</devices>
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</domain>
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"
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echo ${vm_xml} > /tmp/vm.xml
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virsh create /tmp/vm.xml 2>&1 >/dev/null
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if [ $? != 0 ]
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then
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echo "failed to create VM $NAME" >&2
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rm -f /tmp/vm.xml
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exit 1
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fi
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rm -f /tmp/vm.xml
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fi
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# echo mac
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local macaddr=`virsh dumpxml $NAME | grep "mac address" | head -1 | cut -d\' -f2`
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echo $macaddr
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}
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####################
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# Main script code
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####################
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NODEBASE=${NODEBASE:-testvm}
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NODECOUNT=${NODECOUNT:-1}
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NODEOUTPUT=${NODEOUTPUT:-"/tmp/baremetal.csv"}
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TEMPFILE=`mktemp`
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# must be root
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user=`whoami`
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if [ "$user" != "root" ]
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then
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echo "Must be run as root. You are $user." >&2
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exit 1
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fi
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for (( i=1; i<=${NODECOUNT}; i++ ))
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do
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name=${NODEBASE}${i}
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mac=$(create_node $name $VM_CPU $VM_RAM $VM_DISK amd64 $VM_NET_BRIDGE $VM_EMULATOR $VM_LOGDIR)
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printf "$mac,root,undefined,192.168.122.1,$VM_CPU,$VM_RAM,$VM_DISK,flavor,type,a8cb6624-0d9f-c882-affc-046ebb96ec0${i},$name,192.168.122.$((i+1))\n" >>$TEMPFILE
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done
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mv "${TEMPFILE}" "${NODEOUTPUT}"
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