xendomains.init

   1 #!/bin/bash
   2 #
   3 # xendomains            Start / stop domains automatically when domain 0 boots / shuts down.
   4 #
   5 # chkconfig:            345 99 00
   6 # description:          Start / stop Xen domains.
   7 #
   8
   9 . /etc/rc.d/init.d/functions
  10
  11 if ! [ -e /proc/xen/privcmd ]; then
  12         exit 0
  13 fi
  14
  15 TOOLSTACK=$(/usr/libexec/xen/bin/xen-toolstack toolstack 2>/dev/null)
  16 if [ $? -ne 0 ]; then
  17         echo "No usable Xen toolstack selected"
  18         exit 0
  19 fi
  20 if [ "$(basename "$TOOLSTACK")" != xl ] && [ "$(basename "$TOOLSTACK")" != xm ]; then
  21         exit 0
  22 fi
  23
  24 if ! /usr/libexec/xen/bin/xen-toolstack list >/dev/null 2>&1 ; then
  25         exit 0;
  26 fi
  27
  28 [ -r /etc/sysconfig/xendomains ] && . /etc/sysconfig/xendomains
  29
  30 shopt -s nullglob
  31
  32 check_config_name()
  33 {
  34         /usr/libexec/xen/bin/xen-toolstack create --quiet --dryrun --defconfig "$1" | sed -n 's/^.*(name \(.*\))$/\1/p;s/^.*"name": "\(.*\)",$/\1/p'
  35 }
  36
  37 check_running()
  38 {
  39         /usr/libexec/xen/bin/xen-toolstack domid "$1" >/dev/null 2>&1
  40         return $?
  41 }
  42
  43 timeout_coproc()
  44 {
  45         local TIMEOUT=$1
  46         shift
  47
  48         coproc "$@" >/dev/null 2>&1
  49
  50         local COPROC_OUT
  51         exec {COPROC_OUT}<&"${COPROC[0]}"
  52         local PID="$COPROC_PID"
  53
  54         for no in $(seq 0 $TIMEOUT); do
  55                 if [ -z "$COPROC_PID" ]; then break; fi
  56                 sleep 1
  57         done
  58
  59         kill -INT "$COPROC_PID" >/dev/null 2>&1
  60         wait $PID
  61         local rc=$?
  62         if [ $rc -eq 0 ]; then
  63                 ok
  64         else
  65                 fail
  66         fi
  67
  68         [ $rc -gt 0 ] && cat <&$COPROC_OUT
  69         exec <&$COPROC_OUT-
  70 }
  71
  72 timeout_domain()
  73 {
  74         name="$1"
  75         TIMEOUT="$2"
  76         for no in $(seq 0 $TIMEOUT); do
  77                 if ! check_running "$name"; then return 0; fi
  78                 sleep 1
  79         done
  80         return 1
  81 }
  82
  83 do_start_restore()
  84 {
  85         [ -n "$XENDOMAINS_SAVE" ] || return
  86         [ -d "$XENDOMAINS_SAVE" ] || return
  87         [ -n "$XENDOMAINS_RESTORE" ] || return
  88
  89         for file in $XENDOMAINS_SAVE/*; do
  90                 if [ -f $file ] ; then
  91                         name="${file##*/}"
  92                         show "Restoring Xen domain $name (from $file)"
  93                         busy
  94
  95                         out=$(/usr/libexec/xen/bin/xen-toolstack restore "$file" >/dev/null 2>&1)
  96                         case "$?" in
  97                                 0)
  98                                         rm "$file"
  99                                         domains[$name]='started'
 100                                         ok
 101                                         ;;
 102                                 *)
 103                                         domains[$name]='failed'
 104                                         fail
 105                                         echo "$out"
 106                                         ;;
 107                         esac
 108                 fi
 109         done
 110 }
 111
 112 do_start_auto()
 113 {
 114         [ -n "$XENDOMAINS_AUTO" ] || return
 115         [ -d "$XENDOMAINS_AUTO" ] || return
 116
 117         for file in $XENDOMAINS_AUTO/*; do
 118                 name="$(check_config_name $file)"
 119
 120                 if [ "${domains[$name]}" = started ]; then
 121                         :
 122                 elif check_running "$name"; then
 123                         echo "Xen domain $name already running"
 124                 else
 125                         show "Starting Xen domain $name (from $file)"
 126                         busy
 127
 128                         if [ "${domains[$name]}" = failed ]; then
 129                                 fail
 130                         else
 131                                 out=$(/usr/libexec/xen/bin/xen-toolstack create --quiet --defconfig "$file" >/dev/null 2>&1)
 132                                 case "$?" in
 133                                         0)
 134                                                 ok
 135                                                 ;;
 136                                         *)
 137                                                 fail
 138                                                 echo "$out"
 139                                                 ;;
 140                                 esac
 141                         fi
 142                 fi
 143         done
 144 }
 145
 146 do_start()
 147 {
 148         declare -A domains
 149
 150         if [ -f /var/lock/subsys/xendomains ]; then
 151                 msg_already_running "xendomains"
 152                 return
 153         fi
 154
 155         do_start_restore
 156         do_start_auto
 157
 158         touch /var/lock/subsys/xendomains
 159 }
 160
 161 do_stop_migrate()
 162 {
 163         [ -n "$XENDOMAINS_MIGRATE" ] || return
 164
 165         while read id name rest; do
 166                 show "Migrating Xen domain $name ($id)"
 167                 busy
 168                 (timeout_coproc "$XENDOMAINS_STOP_MAXWAIT" /usr/libexec/xen/bin/xen-toolstack migrate $id $XENDOMAINS_MIGRATE)
 169         done < <(/usr/libexec/xen/bin/xen-init-list)
 170 }
 171
 172 do_stop_save()
 173 {
 174         [ -n "$XENDOMAINS_SAVE" ] || return
 175         [ -d "$XENDOMAINS_SAVE" ] || mkdir -m 0700 -p "$XENDOMAINS_SAVE"
 176
 177         while read id name rest; do
 178                 show "Saving Xen domain $name ($id)"
 179                 busy
 180                 (timeout_coproc "$XENDOMAINS_STOP_MAXWAIT" /usr/libexec/xen/bin/xen-toolstack save $id $XENDOMAINS_SAVE/$name)
 181         done < <(/usr/libexec/xen/bin/xen-init-list)
 182 }
 183
 184 do_stop_shutdown()
 185 {
 186         while read id name rest; do
 187                 show "Shutting down Xen domain $name ($id)"
 188                 busy
 189                 /usr/libexec/xen/bin/xen-toolstack shutdown $id >/dev/null 2>&1
 190                 if [ $? -eq 0 ]; then
 191                         ok
 192                 else
 193                         fail
 194                 fi
 195         done < <(/usr/libexec/xen/bin/xen-init-list)
 196         while read id name rest; do
 197                 show "Waiting for Xen domain $name ($id) to shut down"
 198                 busy
 199                 timeout_domain "$name" "$XENDOMAINS_STOP_MAXWAIT"
 200                 if [ $? -eq 0 ]; then
 201                         ok
 202                 else
 203                         fail
 204                 fi
 205         done < <(/usr/libexec/xen/bin/xen-init-list)
 206 }
 207
 208 do_stop()
 209 {
 210         if [ ! -f /var/lock/subsys/xendomains ]; then
 211                 msg_not_running "xendomains"
 212                 return
 213         fi
 214
 215         do_stop_migrate
 216         do_stop_save
 217         do_stop_shutdown
 218
 219         rm -f /var/lock/subsys/xendomains
 220 }
 221
 222 case "$1" in
 223         start)
 224                 do_start
 225                 ;;
 226         stop)
 227                 do_stop
 228                 ;;
 229         restart)
 230                 do_stop
 231                 do_start
 232                 ;;
 233         reload|force-reload)
 234                 do_stop
 235                 do_start
 236                 ;;
 237         status)
 238                 if [ -f /var/lock/subsys/xendomains ]; then
 239                         /usr/libexec/xen/bin/xen-toolstack list -v
 240                 fi
 241                 ;;
 242         *)
 243                 echo "Usage: $0 {start|stop|status|restart|reload|force-reload}"
 244                 exit 3
 245                 ;;
 246 esac
 247
 248 exit 0