Diff of stock smartos_prompt_config.sh vs with autoprovisioning. This has no formatting cleanups except for one small section. admin_mac is passed via a boot parameter in iPXE - autoprovision="true",admin_mac=${netX/mac} is added to the boot parameters to activate this code.

smartos-autoprovision.diff

--- stock-smartos_prompt_config.sh      2012-12-28 02:38:25.657297000 +0000
+++ smartos_prompt_config.sh    2013-01-19 03:31:54.001819025 +0000
@@ -10,6 +10,12 @@
 load_sdc_sysinfo
 load_sdc_config
 
+if /bin/bootparams | grep "^autoprovision=true" >/dev/null; then
+    autoprovision="true"
+else
+    autoprovision="false"
+fi
+
 # Defaults
 datacenter_headnode_id=0
 mail_to="root@localhost"
@@ -358,6 +364,7 @@
     printf "%-56s" "Creating opt dataset... " 
     zfs create -o mountpoint=legacy ${OPTDS} || \
       fatal "failed to create the opt dataset"
+    mount -F zfs ${OPTDS} /opt
     printf "%4s\n" "done" 
   fi
 
@@ -533,10 +540,14 @@
 
 Would you like to continue with configuration? [Y/n]"
 
-printf "$message"
-read continue;
-if [[ $continue == 'n' ]]; then
-       exit 0
+if [[ $autoprovision == 'false' ]]; then
+    printf "$message"
+    read continue;
+    if [[ $continue == 'n' ]]; then
+           exit 0
+    fi
+else
+   printf "\nOoh, magic. Autoprovisioning enabled. Proceeding without caution...\n\n"
 fi
 #
 # Main loop to prompt for user input
@@ -545,6 +556,7 @@
 
        printheader "Networking" 
        
+if [[ $autoprovision == 'false' ]]; then
        promptnic "'admin'"
        admin_nic="$val"
 
@@ -577,6 +589,7 @@
     promptval "Default DNS search domain" "$dns_domain"
     dns_domain="$val"
   fi   
+
        printheader "Storage"
        promptpool
  
@@ -606,6 +619,22 @@
        promptval "Is this correct?" "y"
        [ "$val" == "y" ] && break
        clear
+else
+
+  admin_nic=`/bin/bootparams |grep admin_mac | awk -F= '{print $2}' | sed 's/00/0/g'`
+  admin_ip="dhcp"
+
+  printf "\nAdmin NIC set to: $admin_nic, configured for DHCP."
+
+  # Use all disks
+  DISK_LIST=$(disklist -n)
+
+  # Bogus root_password
+  root_shadow="N0WayM4n"
+
+  break
+fi
+
 done
 admin_network="$net_a.$net_b.$net_c.$net_d"
 
@@ -651,6 +680,8 @@
 
 echo
 echo "Your configuration is about to be applied."
+
+if [[ $autoprovision == 'false' ]]; then
 promptval "Would you like to edit the final configuration file?" "n"
 [ "$val" == "y" ] && vi $tmp_config
 clear
@@ -665,6 +696,38 @@
 [ "$val" == "y" ] && (create_zpools "$DISK_LIST")
 
 clear
+else
+   # Bring up Network
+
+   admin_if=`dladm show-phys -mo link,address |grep $admin_nic |awk '{print $1}'`
+   ifconfig $admin_if dhcp
+   sleep 2
+   echo "nameserver 8.8.8.8" >> /etc/resolv.conf
+
+   # Blow away the disks only if we're reinstalling. At least if something else goes wrong, we don't blow away everything.
+
+   if [[ `curl http://169.254.169.254/state` == "reinstalling" ]]
+   then
+       # If it's a LSI 926X card, clear the existing config and make a set of RAID 0 LDs.
+       # First, work around LSI stupiditity.
+       sed -i.lsi 's/dr_sas/mr_sas/g' /etc/path_to_inst
+       wget -O /tmp/MegaCli http://repo.local/smartos/MegaCli
+       chmod +x /tmp/MegaCli
+       /tmp/MegaCli -CfgClr -Force -a0
+       sleep 2
+       /tmp/MegaCli -CfgEachDskRaid0 -a0
+       sleep 2
+       (create_zpools "$DISK_LIST")
+   fi
+
+   # Grab and un-tar archive into /opt...
+ 
+   wget -O /opt/bootstrap.tar.gz http://repo.local/smartos/bootstrap.tar.gz
+   cd /opt && tar zxf bootstrap.tar.gz
+
+  # Tell the API we're doing reinstalling.
+  curl --insecure --request POST -H "Content-Type: application/xml" --data '<?xml version="1.0" encoding="us-ascii"?><methodCall><methodName>internal.server_restarted</methodName><params><param><value><struct><member><name>success</name><value><int>1</int></value></member><member><name>client_version</name><value><string>0.298</string></value></member></struct></value></param></params></methodCall>' https://api.local/rpc
+fi
 echo "The system will now finish configuration and reboot. Please wait..."
 mv $tmp_config /usbkey/config