ctdb/config/ctdb-backup-persistent-tdbs.sh

   1 #!/bin/sh
   2
   3 # Backup persistent CTDB TDBs into the given directory.
   4
   5 # Copyright: DataDirect Networks, 2024
   6 # Authors: Vinit Agnihotri <vagnihotri@ddn.com>
   7 #          Martin Schwenke <mschwenke@ddn.com>
   8
   9 # This program is free software; you can redistribute it and/or modify
  10 # it under the terms of the GNU General Public License as published by
  11 # the Free Software Foundation; either version 3 of the License, or
  12 # (at your option) any later version.
  13
  14 # This program is distributed in the hope that it will be useful,
  15 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  16 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17 # GNU General Public License for more details.
  18
  19 # You should have received a copy of the GNU General Public License
  20 # along with this program; if not, see <http://www.gnu.org/licenses/>.
  21
  22 # Options:
  23 #
  24 # -l: Only do the backup if this node is the leader node, otherwise
  25 #     exit with 0.
  26 #
  27 # -L <rc>: Only do the backup if this node is the leader node, otherwise
  28 #     exit with <rc>.
  29
  30 #
  31 # Option/argument handling
  32 #
  33
  34 die()
  35 {
  36         echo "ERROR: $1"
  37         exit 1
  38 }
  39
  40 usage()
  41 {
  42         die "usage: $0 [-l | -L <rc> ] <dir>"
  43 }
  44
  45 leader_only=false
  46 leader_only_rc=0
  47 dir=""
  48
  49 while getopts "L:lh?" opt; do
  50         case "$opt" in
  51         L)
  52                 leader_only=true
  53                 leader_only_rc="$OPTARG"
  54                 ;;
  55         l)
  56                 leader_only=true
  57                 ;;
  58         \? | h)
  59                 usage
  60                 ;;
  61         esac
  62 done
  63 shift $((OPTIND - 1))
  64
  65 if [ $# -ne 1 ]; then
  66         usage
  67 fi
  68
  69 dir="$1"
  70
  71 if [ ! -d "$dir" ]; then
  72         die "No such directory ${dir}"
  73 fi
  74
  75 if $leader_only; then
  76         this_node=$(ctdb pnn)
  77         leader_node=$(ctdb leader)
  78         if [ "$this_node" != "$leader_node" ]; then
  79                 exit "$leader_only_rc"
  80         fi
  81 fi
  82
  83 #
  84 # Backups TDBs in timestamped subdirectory
  85 #
  86
  87 dt=$(date "+%Y%m%d%H%M%S")
  88 prefix="ctdb-persistent-db-backup-${dt}"
  89 outdir="${dir}/${prefix}"
  90
  91 # Clean up temporary directory on failure"
  92 trap 'rm -rf ${outdir}' 0
  93
  94 mkdir -p "$outdir"
  95
  96 if ! db_map=$(ctdb getdbmap -X); then
  97         die "Failed to list databases"
  98 fi
  99 db_list=$(echo "$db_map" | awk -F '|' '$5 == "1" { print $3 }')
 100
 101 cd "$outdir" || die "Failed to change directory to ${dir}"
 102
 103 for db in $db_list; do
 104         if ! ctdb backupdb "$db" "${db}.backup"; then
 105                 die "Failed to backup ${db}"
 106         fi
 107 done
 108
 109 #
 110 # Create tarball
 111 #
 112
 113 cd "$dir" || die "Failed to change directory to ${dir}"
 114
 115 tarball="${prefix}.tgz"
 116
 117 if ! tar -c -z -f "$tarball" "$prefix"; then
 118         die "Failed to create tarball"
 119 fi
 120
 121 echo "Created backup tarball ${dir}/${tarball}"
 122
 123 exit 0