Log early boot of Ironic VMs to serial with sgabios

This adds sgabios to the list of packages for Ironic and configures
the libvirt domain to redirect BIOS messages to serial via sgabios,
when console logging is enabled.  The sgabios package in Ubuntu
currently has an apparmor bug, so that is worked around here.

This allows visibility into early boot of Ironic nodes and should
help get to the bottom of a frequent failure we're seeing in the gate.

Change-Id: Ifd18851e2d23d198d36e67883a81afc6a92d2a58
Related-Bug: #1393099

files/apts/ironic

@@ -12,6 +12,7 @@ python-libvirt
 qemu
 qemu-kvm
 qemu-utils
+sgabios
 syslinux
 tftpd-hpa
 xinetd

files/rpms/ironic

@@ -9,6 +9,7 @@ net-tools
 openssh-clients
 openvswitch
 python-libguestfs
+sgabios
 syslinux
 tftp-server
 xinetd

lib/ironic

@@ -147,6 +147,14 @@ function install_ironic {
     if [[ "$IRONIC_IPXE_ENABLED" == "True" ]] ; then
         install_apache_wsgi
     fi
+
+    if [[ "$IRONIC_VM_LOG_CONSOLE" == "True" ]] && is_ubuntu; then
+        # Ubuntu packaging+apparmor issue prevents libvirt from loading
+        # the ROM from /usr/share/misc.  Workaround by installing it directly
+        # to a directory that it can read from. (LP: #1393548)
+        sudo rm -rf /usr/share/qemu/sgabios.bin
+        sudo cp /usr/share/misc/sgabios.bin /usr/share/qemu/sgabios.bin
+    fi
 }
 
 # install_ironicclient() - Collect sources and prepare

tools/ironic/scripts/configure-vm

@@ -78,8 +78,10 @@ def main():
             params['emulator'] = "/usr/bin/qemu-kvm"
 
     if args.console_log:
+        params['bios_serial'] = "<bios useserial='yes'/>"
         params['console_log'] = CONSOLE_LOG % {'console_log': args.console_log}
     else:
+        params['bios_serial'] = ''
         params['console_log'] = ''
     libvirt_template = source_template % params
     conn = libvirt.open("qemu:///system")

tools/ironic/templates/vm.xml

@@ -6,6 +6,7 @@
     <type arch='%(arch)s' machine='pc-1.0'>hvm</type>
     <boot dev='%(bootdev)s'/>
     <bootmenu enable='no'/>
+    %(bios_serial)s
   </os>
   <features>
     <acpi/>