proto typing image building script.

vmimages/.gitignore

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+packer/
+packer_cache/

vmimages/README.md

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+# Building Image
+
+Run the ``build.sh`` with target OS name that you want.
+
+```
+$ ./build.sh centos-7.1-x86_64
+```
+

vmimages/README.qemu-build.md

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+# qemu-build
+
+``qemu-build`` is an image building script inspired by packer-qemu driver.
+This program run the following tasks. Similar to ``packer`` but it is more simplified. 
+
+1. Download iso image from remote site.
+2. Run ``qemu`` with the .iso and FD image and boot installer from the .iso.
+3. Send boot command to console then the unattended install is kicked.
+   Configuration files for the installer are supplied from FD image.
+4. Shutdown ``qemu`` from guest once all done.
+
+## How to use
+
+Basic usage:
+
+```
+% qemu-build build.conf
+```
+
+``build.conf`` has set of shell variables to build new OS image from iso installer.
+
+```
+target_image=centos7.img
+kickstart_file="ks.cfg"
+iso_checksum="d07ab3e615c66a8b2e9a50f4852e6a77"
+iso_urls=(
+  http://ftp.riken.jp/Linux/centos/7.1.1503/isos/x86_64/CentOS-7-x86_64-Minimal-1503-01.iso
+)
+# "<tab>text<space>ks=hd:fd0:/ks.cfg"
+boot_commands=(tab t e x t spc k s equal h d shift-semicolon f d 0 shift-semicolon  slash k s dot c f g ret)
+qemu_args="-m 1G"
+post_scripts=(./post-scripts/*.sh)
+```
+
+```
+# yum install -y $(qemu-build --show-deps)
+```
+
+## Config Parameters
+
+Path information is calculated from the location of config file.
+
+Required: 
+
+``iso_checksum`` 
+
+``iso_urls`` is shell array to supply the list of OS installer image file on remote site. It continues to 
+try next urls until fetching succeeds.
+
+``install_iso`` is path string to the installer image which you already have. ``iso_urls`` is skipped if this 
+parameter is set.
+
+``target_image`` the path to image file to generate.
+
+Optional:
+
+``kickstart_file`` the file is copied to FD image.
+
+``boot_commands`` are sent to qemu guest over ``sendkey`` monitor interface while the OS installer prompts
+and waits for typing keys. ``sendkey`` emulates keyboard so it can only pass one character at a time. See
+the sendkey character list pasted from ``qemu``.
+
+``qemu_args`` extra command options for ``qemu`` if you need.
+
+``qemu_binary`` path to ``qemu`` binary.
+
+``post_scripts`` an array of script path(s) to run at post stage in qemu guest. The files are just copied
+to FD image. unattended installation must be organized to call them. 
+
+``local_scripts`` an array of command line which run at qemu host. They are called after sending ``boot_commands``
+so helps to handle post process on host side until the installation completes.
+
+
+### Local Script
+
+Bundled local scripts:
+
+``screen-watch`` monitors qemu screen updates. It supports
+to detect if updates happens within a period time and kill
+qemu if the installation process is likely to be stopped.
+
+``alt-b`` is just sends alt-b key sequence to qemu. It is
+useful to signal CentOS graphical installer to proceed.
+
+
+### ``sendkey`` character table
+
+
+```
+# discover the supported keys by doing:
+#   telnet 127.0.0.1 4567
+#   sendkey <tab>
+# Here is the result:
+(qemu) sendkey
+0              1              2              3              4
+5              6              7              8              9
+a              again          alt            alt_r          altgr
+altgr_r        apostrophe     asterisk       b              backslash
+backspace      bracket_left   bracket_right  c              caps_lock
+comma          compose        copy           ctrl           ctrl_r
+cut            d              delete         dot            down
+e              end            equal          esc            f
+f1             f10            f11            f12            f2
+f3             f4             f5             f6             f7
+f8             f9             find           front          g
+grave_accent   h              help           home           i
+insert         j              k              kp_0           kp_1
+kp_2           kp_3           kp_4           kp_5           kp_6
+kp_7           kp_8           kp_9           kp_add         kp_decimal
+kp_divide      kp_enter       kp_multiply    kp_subtract    l
+left           less           lf             m              menu
+meta_l         meta_r         minus          n              num_lock
+o              open           p              paste          pause
+pgdn           pgup           print          props          q
+r              ret            right          s              scroll_lock
+semicolon      shift          shift_r        slash          spc
+stop           sysrq          t              tab            u
+undo           unmapped       up             v              w
+x              y              z
+```

vmimages/bin/alt-b

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+#!/bin/bash
+
+# NOTE: Sometimes all the keys above are typed OK and the ks.cfg file
+# is read in OK, but the installation does not start until the user
+# clicks on the "Begin" button.  One possible cause could be the VNC
+# windows being open and some UI events being sent to the graphical
+# installer, which senses the human there and politely asks for
+# confirmation.
+
+# Update: Nope. Did not work even with no vncviewer connected.  Looks like
+# alt-B will select that button.  Seems to take at least 20 seconds to get
+# to that screen so....
+
+if [[ $# -eq 1 ]];
+  sleep $1
+else
+  sleep 60
+fi
+
+echo sendkey alt-b | nc 127.0.0.1 4567
+
+echo
+echo "Just sent an extra alt-b just in case"
+echo "it is stuck on the confirm install screen"
+echo
+

vmimages/bin/qemu-build

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+#!/bin/bash
+
+set -e -o pipefail
+
+# Environment variables
+ISO_CACHE_DIR=${ISO_CACHE_DIR:-"."}
+
+# Configuration parameters in .conf.
+install_iso=
+kickstart_file=
+target_image=
+qemu_binary="qemu-kvm"
+iso_checksum_type="md5"
+iso_checksum=
+declare -a iso_urls=()
+declare -a boot_commands=
+declare -a post_scripts=()
+declare -a local_scripts=()
+
+# option parameters
+is_overwrite_image=
+
+reportfailed()
+{
+    echo "Script failed...exiting. ($*)" 1>&2
+    exit 255
+}
+
+usage_deps() {
+  cat <<END
+qemu-img qemu-kvm mtools dosfstools nc curl
+END
+}
+
+usage() {
+  cat <<END
+$(basename $0) [options] <conf>
+
+Options:
+  --force,-f : Overwrite existing image file.
+
+Install dependencies:
+yum install -y \$($0 --show-deps)
+END
+}
+
+while [[ $# -gt 0 ]]; do
+  case $1 in
+   --help|-h)
+     usage
+     exit 
+     ;;
+   --show-deps)
+     usage_deps
+     exit
+     ;;
+   --force|-f)
+     is_overwrite_image=1
+     shift
+     ;;
+   *)
+     break
+     ;;
+  esac
+done
+
+# Load .conf
+if [[ $# -eq 1 && -f $1 ]]; then
+  CONF_PATH=$1
+  shopt -s nullglob
+  . $CONF_PATH
+  shopt -u nullglob
+else
+  reportfailed "Unknown conf path: $1"
+fi
+
+cd $(dirname $CONF_PATH)
+
+# Minimal parameter checking to catch typos:
+if [[ -z $install_iso ]]; then
+  [[ -n $iso_checksum ]] || reportfailed "iso_checksum not found."
+  [[ -n $iso_checksum_type ]] || reportfailed "iso_checksum_type not found."
+
+  if [[ -f "${ISO_CACHE_DIR}/${iso_checksum}.iso" ]]; then
+    install_iso="${ISO_CACHE_DIR}/${iso_checksum}.iso"
+  else
+    for u in ${iso_urls[@]}
+    do
+      curl --show-error -L -o "${ISO_CACHE_DIR}/${iso_checksum}.iso" "$u"
+      if [[ $? -eq 0 ]]; then
+        sum_val=$("${iso_checksum_type}sum" "${ISO_CACHE_DIR}/${iso_checksum}.iso" | cut -f 1 -d ' ')
+        if [[ "${sum_val}" == "${iso_checksum}" ]]; then
+          install_iso="${ISO_CACHE_DIR}/${iso_checksum}.iso"
+          break
+        else
+          rm -f "${ISO_CACHE_DIR}/${iso_checksum}.iso"
+        fi
+      fi
+    done
+  fi
+fi
+[ -f "$install_iso" ] || reportfailed "Iso ($install_iso) not found."
+
+[ -f "$kickstart_file" ] || reportfailed " ($kickstart_file) not found."
+
+if [[ -z "$is_overwrite_image" ]]; then
+  [ -f "$target_image" ] && reportfailed "$target_image already exists"
+fi
+
+# Make sure it is writable
+touch "$target_image" || reportfailed "Could not create '$target_image' (the third parameter)"
+
+TARGET_DIR="$(cd "$(dirname "$(readlink -f "$target_dir")")" && pwd -P)" || reportfailed
+
+WORK_DIR=$(mktemp -d)
+trap "rm -rf $WORK_DIR" EXIT
+
+# Variables can be referenced from child processes.
+export WORK_DIR CONF_PATH TARGET_DIR KVM_PID
+
+(
+    rm -f "$target_image"
+    qemu-img create -f qcow2 "$target_image" 10000M
+) || reportfailed "Problem while creating empty qcow2 image"
+
+KSFPY="$WORK_DIR/kickstart_floppy.img"
+
+(
+    dd if=/dev/zero of="$KSFPY" count=1440 bs=1k
+    /sbin/mkfs.msdos "$KSFPY"
+    if [[ -f $kickstart_file ]]; then
+      mcopy -i "$KSFPY" "$kickstart_file" ::/ks.cfg
+    fi
+    if [[ ${#post_scripts} -gt 0 ]]; then
+      for src in ${post_scripts[@]}
+      do
+        mcopy -i "$KSFPY" "$src" ::/$(basename $src)
+      done
+    fi
+    mdir -i "$KSFPY"
+) || reportfailed "Problem while creating floppy with kickstart file"
+
+
+kvmcmdline=(
+    $qemu_binary
+    -name ksvm
+
+    -fda "$KSFPY"
+    -drive "file=$target_image,if=virtio,cache=writeback,discard=ignore"
+
+    -machine type=pc,accel=kvm
+
+    -netdev user,id=user.0,hostfwd=tcp::2224-:22
+    -device virtio-net,netdev=user.0
+    -monitor telnet:0.0.0.0:4567,server,nowait
+    -vnc 0.0.0.0:47
+    $qemu_args
+    )
+
+#echo "${kvmcmdline[@]}" >runscript.sh
+#chmod +x runscript.sh
+
+echo "${kvmcmdline[@]}" -boot once=d -cdrom "$install_iso"
+if ! type $qemu_binary > /dev/null 2>&1; then
+  reportfailed "Not found $qemu_binary"
+fi
+"${kvmcmdline[@]}" -boot once=d -cdrom "$install_iso" >"$WORK_DIR/kvm.stdout" 2>"$WORK_DIR/kvm.stderr" &
+KVM_PID=$!
+echo "$KVM_PID" >"$WORK_DIR/kvm.pid"
+echo "Qemu launched ($KVM_PID)"
+
+sleep 15
+
+if [[ ${#boot_commands} -gt 0 ]]; then
+  echo "Sending boot command..."
+  echo ${boot_commands[@]}
+  for k in ${boot_commands[@]}
+  do
+    echo sendkey $k
+  done | nc 127.0.0.1 4567 > $WORK_DIR/boot_command.log
+fi
+
+if [[ ${#local_scripts} -gt 0 ]]; then
+  for i in "${local_scripts[@]}"
+  do
+    echo "Local script: $i"
+    $i
+  done
+fi
+
+echo "Now waiting for kvm to exit. (FYI, ^c will kill KVM)"
+wait