roles/base/backup/files/default/backup.sh

   1 #!/bin/bash
   2 ################################################
   3 ### Managed by someone's ansible provisioner ###
   4 ################################################
   5 # Part of: https://git.somenet.org/root/pub/somesible.git
   6 # 2017-2024 by someone <someone@somenet.org>
   7 #
   8
   9 umask 0077
  10 cd /tmp
  11 export ERRCODE=0
  12
  13 export BORG_UNKNOWN_UNENCRYPTED_REPO_ACCESS_IS_OK="yes"
  14 export BORG_RELOCATED_REPO_ACCESS_IS_OK="yes"
  15
  16 function backup {
  17     export BKPREPO=${1} # backup repo (should be: "/bkp/storage-local/$host/$path" or for ssh: "user@server:$path")
  18     export BKPHOST=${2} # src-host
  19     export BKPPATH=${3} # abs-path on src-host
  20     export BKPKEEP=${4} # pruning-settings
  21     export BORG_PASSPHRASE=${5} # borg key passphrase
  22
  23     BKPPATH_ESCAPED=$(echo -n "$BKPPATH"|sed -e 's#/#-#g') # contains first "/"
  24
  25     if [[ -z "$BORG_PASSPHRASE" ]]; then
  26         borg info "$BKPREPO" >/dev/null 2>&1 || borg init --umask 0077 -e none --make-parent-dirs "$BKPREPO"
  27     else
  28         borg info "$BKPREPO" >/dev/null 2>&1 || borg init --umask 0077 -e repokey-blake2 --make-parent-dirs "$BKPREPO"
  29     fi
  30
  31     echo "# Merged on: $(date -Isec)" > "/bkp/local/exclude.conf.d/.merged.$BKPHOST-$BKPPATH_ESCAPED"
  32     for file in /bkp/local/exclude.conf.d/$BKPHOST-$BKPPATH_ESCAPED*; do
  33         echo -e "\n\n# $file" >> "/bkp/local/exclude.conf.d/.merged.$BKPHOST-$BKPPATH_ESCAPED"
  34         cat "$file" >> "/bkp/local/exclude.conf.d/.merged.$BKPHOST-$BKPPATH_ESCAPED"
  35     done
  36
  37     borg create --umask 0077 --info --list --stats --noctime --nobirthtime --exclude-caches --exclude-from "/bkp/local/exclude.conf.d/.merged.$BKPHOST-$BKPPATH_ESCAPED" "$BKPREPO::$BKPHOST-$BKPPATH_ESCAPED--{now}" "$BKPPATH"
  38         exit_status=$?;
  39         if [ $exit_status -ne 0 ]; then
  40             export ERRCODE="$exit_status";
  41             echo "** backup.sh (backup:create): non-zero exitcode: $exit_status"
  42         fi
  43
  44     backup_prune "$BKPREPO" "$BKPKEEP" "$BORG_PASSPHRASE"
  45 }
  46
  47 function backup_cmd {
  48     export BKPREPO=${1} # backup repo (should be: "/bkp/storage-local/$host/$path" or for ssh: "user@server:$path")
  49     export BKPNAME=${2} # backup name
  50     export BKPCMD=${3}  # command to run
  51     export BKPKEEP=${4} # pruning-settings
  52     export BORG_PASSPHRASE=${5} # borg key passphrase
  53
  54     if [[ -z "$BORG_PASSPHRASE" ]]; then
  55         borg info "$BKPREPO" >/dev/null 2>&1 || borg init --umask 0077 -e none --make-parent-dirs "$BKPREPO"
  56     else
  57         borg info "$BKPREPO" >/dev/null 2>&1 || borg init --umask 0077 -e repokey-blake2 --make-parent-dirs "$BKPREPO"
  58     fi
  59
  60     borg create --umask 0077 --info --stats --noctime --nobirthtime --compression zstd --files-cache disabled --content-from-command -- "$BKPREPO::$BKPNAME--{now}" $BKPCMD
  61         exit_status=$?;
  62         if [ $exit_status -ne 0 ]; then
  63             export ERRCODE="$exit_status";
  64             echo "** backup.sh (backup_cmd:create): non-zero exitcode: $exit_status"
  65         fi
  66
  67     backup_prune "$BKPREPO" "$BKPKEEP" "$BORG_PASSPHRASE"
  68 }
  69
  70 function backup_prune {
  71     export BKPREPO=${1} # backup repo (should be: "/bkp/storage-local/$host/$path" or for ssh: "user@server:$path")
  72     export BKPKEEP=${2} # pruning-settings
  73     export BORG_PASSPHRASE=${3} # borg key passphrase
  74
  75     if [[ -z "$BKPKEEP" ]]; then
  76         echo "** backup.sh(backup_prune): No prune settings, skipping"
  77     else
  78         borg prune --umask 0077 --list --stats --save-space --keep-last 1 $BKPKEEP "$BKPREPO"
  79             exit_status=$?;
  80             if [ $exit_status -ne 0 ]; then
  81                 export ERRCODE="$exit_status";
  82                 echo "** backup.sh (backup_prune:prune): non-zero exitcode: $exit_status"
  83             fi
  84        borg compact -v --cleanup-commits "$BKPREPO"
  85             exit_status=$?;
  86             if [ $exit_status -ne 0 ]; then
  87                 export ERRCODE="$exit_status";
  88                 echo "** backup.sh (backup_prune:compact): non-zero exitcode: $exit_status"
  89             fi
  90     fi
  91 }
  92
  93 # run managed
  94 echo "** backup.sh: running /bkp/local/backup.conf.managed"
  95 source /bkp/local/backup.conf.managed
  96
  97 # run local additions
  98 if [ -e "/bkp/local/backup.conf.local" ]; then
  99     echo "** backup.sh: running /bkp/local/backup.conf.local"
 100     source /bkp/local/backup.conf.local
 101 fi
 102
 103 echo "** backup.sh: DONE"
 104
 105 unset BORG_UNKNOWN_UNENCRYPTED_REPO_ACCESS_IS_OK
 106 unset BORG_RELOCATED_REPO_ACCESS_IS_OK
 107
 108 exit $ERRCODE