Create a method to push an image to a live running Chromium OS machine

src/scripts/image_to_live.sh

+#!/bin/bash
+
+# Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Script to convert the output of build_image.sh to a usb image.

[petkov, 2009/12/23 02:00:39]

Please change description.

+
+# Load common constants.  This should be the first executable line.
+# The path to common.sh should be relative to your script's location.
+. "$(dirname "$0")/common.sh"
+
+assert_outside_chroot
+
+cd $(dirname "$0")
+
+DEFAULT_PRIVATE_KEY="$SRC_ROOT/platform/testing/testing_rsa"
+
+DEFINE_string ip "" "IP address of running Chromium OS instance"
+DEFINE_boolean ignore_version $FLAGS_TRUE \
+  "Ignore existing version on running instance and always update"
+DEFINE_boolean ignore_hostname $FLAGS_TRUE \
+  "Ignore existing AU hostname on running instance use this hostname"
+DEFINE_string private_key "$DEFAULT_PRIVATE_KEY" \
+  "Private key of root account on instance"
+
+FLAGS "$@" || exit 1
+eval set -- "${FLAGS_ARGV}"
+
+set -e
+
+if [ -z "$FLAGS_ip" ]; then
+  echo "Please specify the IP of the Chromium OS instance"
+  exit 1
+fi
+
+TMP=$(mktemp -d /tmp/image_to_live.XXXX)
+TMP_PRIVATE_KEY=$TMP/private_key
+TMP_KNOWN_HOSTS=$TMP/known_hosts
+
+function kill_all_devservers {
+  ! pkill -f 'python devserver.py'
+}
+
+function cleanup {
+  kill_all_devservers
+  rm -rf $TMP
+}
+
+trap cleanup EXIT
+
+function remote_sh {
+  # Disable strict host checking so that we don't prompt the user when
+  # the host key file is removed and just go ahead and add it.
+  REMOTE_OUT=$(ssh -o StrictHostKeyChecking=no -o \
+    UserKnownHostsFile=$TMP_KNOWN_HOSTS root@$FLAGS_ip "$@")
+  return ${PIPESTATUS[0]}
+}
+
+function remote_reboot_sh {

[petkov, 2009/12/23 02:00:39]

A bit confusing name because the routine has nothing to do with reboot.

+  rm -f $TMP_KNOWN_HOSTS
+  remote_sh "$@"
+}
+
+function set_up_remote_access {
+  if [ -z "$SSH_AGENT_PID" ]; then
+    eval `ssh-agent`
+  fi
+  cp $FLAGS_private_key $TMP_PRIVATE_KEY
+  chmod 0400 $TMP_PRIVATE_KEY
+  ssh-add $TMP_PRIVATE_KEY
+
+  # Verify the client is reachable before continuing
+  remote_sh "true"
+}
+
+function start_dev_server {
+  kill_all_devservers
+  sudo -v
+  ./enter_chroot.sh "cd ../platform/dev; ./start-devserver.sh>/dev/null 2>&1" &
+  echo -n "Waiting on devserver to start"
+  until netstat -anp 2>&1 | grep 8080 > /dev/null; do
+    sleep .5
+    echo -n "."
+  done
+  echo ""
+}
+
+function prepare_update_metadata {
+  remote_sh "mount -norw,remount /"
+
+  if [ $FLAGS_ignore_version -eq $FLAGS_TRUE ]; then
+    echo "Forcing update independent of the current version"

[petkov, 2009/12/23 02:00:39]

This change adds an -f flag to force update.
http://codereview.chromium.org/503088

+    remote_sh "cat /etc/lsb-release |\
+        grep -v CHROMEOS_RELEASE_VERSION > /etc/lsb-release~;\
+        mv /etc/lsb-release~ /etc/lsb-release; \
+        echo 'CHROMEOS_RELEASE_VERSION=0.0.0.0' >> /etc/lsb-release"
+  fi
+
+  if [ $FLAGS_ignore_hostname -eq $FLAGS_TRUE ]; then
+    echo "Forcing update from $HOSTNAME"
+    remote_sh "cat /etc/lsb-release |\
+        grep -v '^CHROMEOS_AUSERVER=' |\
+        grep -v '^CHROMEOS_DEVSERVER=' > /etc/lsb-release~;\
+        mv /etc/lsb-release~ /etc/lsb-release; \
+        echo 'CHROMEOS_AUSERVER=http://$HOSTNAME:8080/update' >> \
+          /etc/lsb-release; \
+        echo 'CHROMEOS_DEVSERVER=http://$HOSTNAME:8080' >> /etc/lsb-release"
+  fi
+
+  remote_sh "mount -noro,remount /"
+}
+
+function run_auto_update {
+  echo "Starting update and clear away prior"
+  UPDATE_FILE=/var/log/softwareupdate.log
+  # Clear it out so we don't see a prior run and make sure it
+  # exists so the first tail below can't fail if it races the
+  # memento updater first write and wins.
+  remote_sh "rm -f $UPDATE_FILE; touch $UPDATE_FILE; \
+      /opt/google/memento_updater/memento_updater.sh</dev/null>&/dev/null&"
+
+  local update_error
+  local output_file
+  local progress
+
+  update_error=1
+  output_file=$TMP/output
+
+  while true; do
+    # The softwareupdate.log gets pretty bit with download progress

[petkov, 2009/12/23 02:00:39]

s/bit/big/

+    # lines so only look in the last 100 lines for status.
+    remote_sh "tail -100 $UPDATE_FILE"
+    echo "$REMOTE_OUT" > $output_file
+    progress=$(tail -4 $output_file | grep 0K | head -1)
+    if [ -n "$progress" ]; then
+      echo "Image fetching progress: $progress"
+    fi
+    if grep -q 'updatecheck status="noupdate"' $output_file; then
+      echo "devserver is claiming there is no update available."
+      echo "Consider setting --ignore_version."
+      break
+    fi
+    if grep -q 'Autoupdate applied. You should now reboot' $output_file; then
+      echo "Autoupdate was successful."
+      update_error=0
+    fi
+    if grep -q 'Memento AutoUpdate terminating' $output_file; then
+      break
+    fi
+    # Sleep for a while so that ssh handling doesn't slow down the install
+    sleep 2
+  done
+  
+  return $update_error
+}
+
+function remote_reboot {
+  echo "Rebooting."
+  remote_sh "touch /tmp/awaiting_reboot; reboot"
+  local output_file
+  output_file=$TMP/output
+
+  while true; do
+    REMOTE_OUT=""
+    # This may fail while the machine is done so generate output and a 

[petkov, 2009/12/23 02:00:39]

The "right" way to do this is to babysit the boot process by checking the
boot_id:
/proc/sys/kernel/random/boot_id

+    # boolean result to distinguish between down/timeout and real failure
+    ! remote_reboot_sh "echo 0; [ -e /tmp/awaiting_reboot ] && echo '1'; true"
+    echo "$REMOTE_OUT" > $output_file
+    if grep -q "0" $output_file; then
+      if grep -q "1" $output_file; then
+        echo "Not yet rebooted"
+      else
+        echo "Rebooted and responding"
+        break
+      fi
+    fi
+    sleep .5
+  done
+}
+
+set_up_remote_access
+
+if remote_sh [ -e /tmp/memento_autoupdate_completed ]; then
+  echo "Machine has been updated but not yet rebooted.  Rebooting it now."
+  echo "Rerun this script if you still wish to update it."
+  remote_reboot
+  exit 1
+fi
+
+start_dev_server
+
+prepare_update_metadata
+
+if ! run_auto_update; then
+  echo "Update was not successful."
+  exit
+fi
+
+remote_reboot
+
+remote_sh "grep ^CHROMEOS_RELEASE_DESCRIPTION= /etc/lsb-release"
+RELEASE_DESCRIPTION=$(echo $REMOTE_OUT | cut -d '=' -f 2)
+echo "Update was successful and rebooted to $RELEASE_DESCRIPTION"