debian/xvm-iscsi-config.postinst

   1 #!/bin/bash
   2 # postinst script for xvm-iscsi-config
   3 #
   4 # see: dh_installdeb(1)
   5
   6 set -e
   7
   8 # Source debconf library
   9 . /usr/share/debconf/confmodule
  10
  11 # summary of how this script can be called:
  12 #        * <postinst> `configure' <most-recently-configured-version>
  13 #        * <old-postinst> `abort-upgrade' <new version>
  14 #        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
  15 #          <new-version>
  16 #        * <postinst> `abort-remove'
  17 #        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
  18 #          <failed-install-package> <version> `removing'
  19 #          <conflicting-package> <version>
  20 # for details, see http://www.debian.org/doc/debian-policy/ or
  21 # the debian-policy package
  22
  23 # dh_installdeb will replace this with shell code automatically
  24 # generated by other debhelper scripts.
  25
  26 #DEBHELPER#
  27
  28 get_current_sessions() {
  29     for i in $(cd /sys/class/iscsi_session/ && ls); do
  30         echo $(cat /sys/class/iscsi_connection/connection${i#session}:0/persistent_address) \
  31 $(cat /sys/class/iscsi_host/$(readlink /sys/class/iscsi_session/$i/device | perl -ne '/host\d+/ && print $&')/netdev)
  32     done | sort
  33 }
  34
  35 get_new_sessions() {
  36     for i in $(invirt-getconf --ls iscsi.targets); do
  37         echo $(invirt-getconf iscsi.targets.$i.ip) $(invirt-getconf iscsi.targets.$i.iface)
  38     done | sort
  39 }
  40
  41 case "$1" in
  42     configure)
  43         db_get xvm-iscsi-config/username
  44         USERNAME="$RET"
  45         db_get xvm-iscsi-config/password
  46         PASSWORD="$RET"
  47         db_stop
  48
  49         OLD_USERNAME=$(invirt-getconf iscsi.username 2>/dev/null)
  50         OLD_PASSWORD=$(invirt-getconf iscsi.password 2>/dev/null)
  51
  52         if [ -e /etc/invirt/conf.d/iscsi ]; then
  53           # invirt.config.run_parts_list excludes backup filenames.
  54           mv -f /etc/invirt/conf.d/iscsi /etc/invirt/conf.d/iscsi~
  55         fi
  56         cat >/etc/invirt/conf.d/iscsi <<EOF
  57 iscsi:
  58  username: $USERNAME
  59  password: $PASSWORD
  60 EOF
  61
  62         # Attempt to determine whether the iSCSI configuration has changed at all
  63         safe=""
  64
  65         if [ -z "$2" ]; then
  66             invoke-rc.d xvm-iscsi-config restart
  67             invoke-rc.d open-iscsi restart
  68         elif [[ "$USERNAME" -ne "$OLD_USERNAME" || "$PASSWORD" -ne "$OLD_PASSWORD" ]]; then
  69             cat <<EOF
  70 xvm-iscsi-config: The login credentials have changed.  Restart iscsi:
  71   /etc/init.d/xvm-iscsi-config restart
  72   /etc/init.d/open-iscsi restart
  73 EOF
  74             safe=no
  75         fi
  76         if ! diff <(get_current_sessions) <(get_new_sessions) >/dev/null; then
  77             if [ -z "$safe" ]; then
  78                 for i in $(invirt-getconf --ls iscsi.targets); do
  79                     iscsiadm -m discovery -t st -p $(invirt-getconf iscsi.targets.$i.ip):3260 -I $(invirt-getconf iscsi.targets.$i.iface)
  80                     iscsiadm -m node -p $(invirt-getconf iscsi.targets.$i.ip):3260 -I $(invirt-getconf iscsi.targets.$i.iface) -l
  81                 done
  82             else
  83               for i in $(invirt-getconf --ls iscsi.targets); do
  84                   echo "  "iscsiadm -m discovery -t st -p $(invirt-getconf iscsi.targets.$i.ip):3260 -I $(invirt-getconf iscsi.targets.$i.iface)
  85                   echo "  "iscsiadm -m node -p $(invirt-getconf iscsi.targets.$i.ip):3260 -I $(invirt-getconf iscsi.targets.$i.iface) -l
  86               done
  87             fi
  88             cat <<EOF
  89 You may want to recreate the LVM nodes:
  90   lvchange -a ln /dev/xenvg && lvchange -a y /dev/xenvg
  91 This will leave VMs unable to access their disks, so migrate them first.
  92
  93 EOF
  94         fi
  95     ;;
  96
  97     abort-upgrade|abort-remove|abort-deconfigure)
  98     ;;
  99
 100     *)
 101         echo "postinst called with unknown argument \`$1'" >&2
 102         exit 1
 103     ;;
 104 esac
 105
 106 exit 0