new VM automations scripts

virt-add-vhostuser.sh

@@ -0,0 +1,104 @@
+#!/bin/bash
+
+function error_exit() {
+	echo "$1"
+	exit 1
+}
+
+function usage() {
+	echo ""
+	echo "usage:"
+	echo "virt-add-vhustuser <vm-name> [virtio-net driver options]"
+	echo ""
+	echo "--mode=[client|server] default is client"
+	echo "--nrq=[1-N]            the number of queues"
+	echo "--rxqsz=[256-1024]     the number of descriptors in the RX queue"
+	echo "--txqsz=[256-1024]     the number of descriptors in the TX queue"
+	echo "--nomrg                disable mergable buffers"
+	exit
+}
+
+if [ -z $1 ]; then
+	error_exit "You must provide a VM name"
+fi
+vm_name=$1
+shift
+source_opts=""
+driver_opts=""
+host_opts=""
+
+# Process options and arguments
+opts=$(getopt -q -o i:c:t:r:m:p:M:S:C: --longoptions "help,mode:,rxqsz:,txqsz:,nomrg,nrq:" -n "getopt.sh" -- "$@")
+if [ $? -ne 0 ]; then
+	printf -- "$*\n"
+	printf "\n"
+	printf "\t${benchmark}: you specified an invalid option\n\n"
+	usage
+	exit 1
+fi
+eval set -- "$opts"
+while true; do
+	case "$1" in
+		--help)
+		usage
+		exit
+		;;
+		--mode)
+		shift
+		if [ -n "$1" ]; then
+			source_opts="$source_opts mode='$1'"
+			shift
+		fi
+		;;
+		--nrq)
+		shift
+		if [ -n "$1" ]; then
+			driver_opts="$driver_opts queues='$1'"
+			shift
+		fi
+		;;
+		--rxqsz)
+		shift
+		if [ -n "$1" ]; then
+			driver_opts="$driver_opts rx_queue_size='$1'"
+			shift
+		fi
+		;;
+		--txqsz)
+		shift
+		if [ -n "$1" ]; then
+			driver_opts="$driver_opts tx_queue_size='$1'"
+			shift
+		fi
+		;;
+		--nomrg)
+		shift
+		host_opts="$host_opts mrg_rxbuf='off'"
+		;;
+		--)
+		shift
+		break
+		;;
+		*)
+		error_exit "[$script_name] bad option, \"$1 $2\""
+		;;
+	esac
+done
+
+
+echo "vm_name is $vm_name"
+
+virsh list --name --all | grep -q -E \^$vm_name\$ || error_exit "$vm_name could not be found"
+
+vhu_count=`virsh domiflist $vm_name | grep -c vhostuser`
+echo $source_opts | grep -q "mode=" || source_opts="$source_opts mode='client'"
+
+echo  "<interface type='vhostuser'>\
+         <source type='unix' path='/var/run/openvswitch/vhost-user-$vhu_count' $source_opts/>\
+         <model type='virtio'/>\
+         <driver name='vhost' $driver_opts>\
+             <host $host_opts />\
+         </driver>\
+       </interface>" >/tmp/vhu.xml
+
+virsh attach-device $vm_name /tmp/vhu.xml --config

virt-boot-vms.sh

@@ -0,0 +1,121 @@
+#!/bin/bash
+
+# This script will boot VMs and provide a list like the following:
+# 
+# waiting to vms to boot up
+#             vm-name            hostname
+#                 vm1       virbr0-122-11
+#                 vm4      virbr0-122-194
+#                 vm3      virbr0-122-209
+#
+# There are a couple things required to make this work:
+#
+# 1) The VM config must have 2 serial ports configured in the XML, like:
+#
+#    <serial type='pty'>
+#      <target port='0'/>
+#    </serial>
+#    <serial type='file'>
+#      <source path='/var/log/libvirt/qemu/<vm-name>.serial.log'/>
+#      <target port='1'/>
+#    </serial>
+#    <console type='pty'>
+#      <target type='serial' port='0'/>
+#    </console>
+#
+#    The first serial port is for the systems main console,
+#    which provides access to grub and access to log in
+#    without a graphical console or network, should you need
+#    to trouble-shoot something.
+#
+#    The seconds serial port is used to log kernel & console
+#    message to a file on the kvm host.  This script expects
+#    that file in /var/log/libvirt/qemu/<vm-name>.serial.log.
+#
+#  2) The VM OS must have both ttyS0 and ttyS1 configured:
+#    
+#    In the VM's /etc/default/grub, add these lines:
+#       GRUB_CMDLINE_LINUX_DEFAULT="console=ttyS1,115200n8 console=ttyS0,115200n8"
+#       GRUB_TERMINAL=serial
+#       GRUB_SERIAL_COMMAND="serial --speed=115200 --unit=0 --word=8 --parity=no --stop=1"
+#
+#    And then on the VM run:
+#
+#       grub2-mkconfig -o /boot/grub2/grub.cfg
+#
+#  3) The VM's login service needs to be configured for the serial consoles:
+#
+#    Create /etc/systemd/system/  files:
+#
+#       [Unit]
+#       Description=Serial Getty on %I
+#       Documentation=man:agetty(8) man:systemd-getty-generator(8)
+#       Documentation=http://0pointer.de/blog/projects/serial-console.html
+#       BindsTo=dev-%i.device
+#       After=dev-%i.device systemd-user-sessions.service plymouth-quit-wait.service
+#       After=rc-local.service
+#       After=network-online.target
+#       Wants=network-online.target
+# 
+#       Before=getty.target
+#       IgnoreOnIsolate=yes
+# 
+#       [Service]
+#       ExecStart=-/sbin/agetty --keep-baud %I 115200,38400,9600
+#       Type=idle
+#       Restart=always
+#       RestartSec=0
+#       UtmpIdentifier=%I
+#       TTYPath=/dev/%I
+#       TTYReset=yes
+#       TTYVHangup=yes
+#       KillMode=process
+#       IgnoreSIGPIPE=no
+#       SendSIGHUP=yes
+# 
+#       [Install]
+#       WantedBy=getty.target
+#
+#    The "After/Wants=networ-online.target" will wait until the network
+#    device is online before the login prompt is available for the serial
+#    consoles.  We wait for that because we want the login prompt to
+#    include the hostname, like:
+#
+#       virbr0-122-195 login:
+# 
+#    This is what this script looks for in the /var/log/libvirt/qemu/<vn-name>.serial.log
+#    file in order to detect the VM's hostname.
+
+
+
+
+vms=$1 #comma separated list (no spaces) of vms: vm1,vm2,vm4
+vms=`echo $vms | sed -e s/","/" "/g`
+log_dir=/tmp
+
+# clear out the current serial log
+for vm in $vms; do
+	if [ -f $log_dir/$vm.console ]; then
+		/bin/rm $log_dir/$vm.console
+	fi
+done
+
+for vm in $vms; do
+	virsh start $vm
+done
+wait
+
+echo "waiting to vms to boot up"
+printf "%20s%20s\n" "vm-name" "hostname"
+while [ ! -z "$vms" ]; do
+	for vm in $vms; do
+		if grep -q "login:" "$log_dir/$vm.console"; then
+			vm_hostname=`grep "login:" "$log_dir/$vm.console" | awk '{print $1}'`
+			printf "%20s%20s\n" $vm $vm_hostname
+			vms="`echo $vms | sed -e s/"$vm"//`"
+			vms="`echo $vms | sed -e s/\s+/\s/`"
+			break
+		fi
+	sleep 5
+	done
+done