461 lines
9.3 KiB
Bash
461 lines
9.3 KiB
Bash
#!/bin/sh
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# Nico Schottelius
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# written for SyGroup (www.sygroup.ch)
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# Date: Mon Nov 14 11:45:11 CET 2005
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# Last Modified: (See ls -l or git)
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#
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# where to find our configuration and temporary file
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#
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CCOLLECT_CONF=${CCOLLECT_CONF:-/etc/ccollect}
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CSOURCES=$CCOLLECT_CONF/sources
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CDEFAULTS=$CCOLLECT_CONF/defaults
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CPREEXEC="$CDEFAULTS/pre_exec"
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CPOSTEXEC="$CDEFAULTS/post_exec"
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TMP=$(mktemp /tmp/$(basename $0).XXXXXX)
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VERSION=0.4.1
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RELEASE="2006-06-16"
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HALF_VERSION="ccollect $VERSION"
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FULL_VERSION="ccollect $VERSION ($RELEASE)"
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#
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# Date
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# CDATE: how we use it for naming of the archives
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# DDATE: how the user should see it in our output
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#
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CDATE="date +%Y-%m-%d-%H%M"
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DDATE="date"
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#
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# unset parallel execution
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#
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PARALLEL=""
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#
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# catch signals
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#
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trap "rm -f \"$TMP\"" 1 2 15
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add_name()
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{
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sed "s:^:\[$name\] :"
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}
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#
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# Tell how to use us
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#
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usage()
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{
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echo "$(basename $0): <interval name> [args] <sources to backup>"
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echo ""
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echo " ccollect creates (pseudo) incremental backups"
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echo ""
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echo " -h, --help: Show this help screen"
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echo " -p, --parallel: Parallelise backup processes"
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echo " -a, --all: Backup all sources specified in $CSOURCES"
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echo " -v, --verbose: Be very verbose (uses set -x)."
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echo ""
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echo " This is version $VERSION, released on ${RELEASE}"
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echo " (the first version was written on 2005-12-05 by Nico Schottelius)."
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echo ""
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echo " Retrieve latest ccollect at http://linux.schottelius.org/ccollect/"
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exit 0
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}
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#
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# need at least interval and one source or --all
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#
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if [ $# -lt 2 ]; then
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usage
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fi
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#
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# check for configuraton directory
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#
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if [ ! -d "$CCOLLECT_CONF" ]; then
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echo "No configuration found in \"$CCOLLECT_CONF\"" \
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" (set \$CCOLLECT_CONF corectly?)"
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exit 1
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fi
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#
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# Filter arguments
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#
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INTERVAL=$1; shift
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i=1
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no_sources=0
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while [ $i -le $# ]; do
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eval arg=\$$i
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if [ "$NO_MORE_ARGS" = 1 ]; then
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eval source_${no_sources}=\"$arg\"
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no_sources=$(($no_sources+1))
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else
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case $arg in
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-a|--all)
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ALL=1
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;;
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-v|--verbose)
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VERBOSE=1
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;;
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-p|--parallel)
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PARALLEL="1"
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;;
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-h|--help)
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usage
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;;
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--)
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NO_MORE_ARGS=1
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;;
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*)
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eval source_${no_sources}=\"$arg\"
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no_sources=$(($no_sources+1))
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;;
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esac
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fi
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i=$(($i+1))
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done
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#
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# be really really really verbose
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#
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if [ "$VERBOSE" = 1 ]; then
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set -x
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fi
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#
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# Look for pre-exec command (general)
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#
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if [ -x "$CPREEXEC" ]; then
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echo "Executing $CPREEXEC ..."
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"$CPREEXEC"
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echo "Finished ${CPREEXEC}."
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if [ $? -ne 0 ]; then
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echo "$CPREEXEC failed, aborting backup."
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exit 1
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fi
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fi
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#
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# Look, if we should take ALL sources
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#
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if [ "$ALL" = 1 ]; then
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# reset everything specified before
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no_sources=0
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#
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# get entries from sources
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#
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cwd=$(pwd)
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cd "$CSOURCES";
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ls > "$TMP"
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while read tmp; do
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eval source_${no_sources}=\"$tmp\"
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no_sources=$(($no_sources+1))
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done < "$TMP"
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fi
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#
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# Need at least ONE source to backup
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#
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if [ "$no_sources" -lt 1 ]; then
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usage
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else
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echo "==> $HALF_VERSION: Beginning backup using interval $INTERVAL <=="
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fi
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#
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# check default configuration
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#
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D_FILE_INTERVAL="$CDEFAULTS/intervals/$INTERVAL"
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D_INTERVAL=$(cat "$D_FILE_INTERVAL" 2>/dev/null)
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#
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# Let's do the backup
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#
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i=0
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while [ "$i" -lt "$no_sources" ]; do
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#
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# Get current source
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#
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eval name=\$source_${i}
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i=$(($i+1))
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export name
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#
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# start ourself, if we want parallel execution
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#
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if [ "$PARALLEL" ]; then
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"$0" "$INTERVAL" "$name" &
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continue
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fi
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#
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# Start subshell for easy log editing
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#
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(
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#
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# Stderr to stdout, so we can produce nice logs
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#
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exec 2>&1
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#
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# Standard locations
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#
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backup="$CSOURCES/$name"
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c_source="$backup/source"
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c_dest="$backup/destination"
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c_exclude="$backup/exclude"
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c_verbose="$backup/verbose"
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c_vverbose="$backup/very_verbose"
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c_rsync_extra="$backup/rsync_options"
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c_summary="$backup/summary"
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c_pre_exec="$backup/pre_exec"
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c_post_exec="$backup/post_exec"
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begin=$($DDATE)
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begin_s=$(date +%s)
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#
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# unset possible options
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#
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EXCLUDE=""
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RSYNC_EXTRA=""
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SUMMARY=""
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VERBOSE=""
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VVERBOSE=""
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echo "$begin Beginning to backup"
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#
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# Standard configuration checks
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#
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if [ ! -e "$backup" ]; then
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echo "Source does not exist."
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exit 1
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fi
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#
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# configuration _must_ be a directory
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#
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if [ ! -d "$backup" ]; then
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echo "\"$name\" is not a cconfig-directory. Skipping."
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exit 1
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fi
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#
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# first execute pre_exec, which may generate destination or other
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# parameters
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#
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if [ -x "$c_pre_exec" ]; then
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echo "Executing $c_pre_exec ..."
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"$c_pre_exec"
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echo "Finished ${c_pre_exec}."
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if [ $? -ne 0 ]; then
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echo "$c_pre_exec failed, aborting backup."
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exit 1
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fi
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fi
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#
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# interval definition: First try source specific, fallback to default
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#
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c_interval="$(cat "$backup/intervals/$INTERVAL" 2>/dev/null)"
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if [ -z "$c_interval" ]; then
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c_interval=$D_INTERVAL
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if [ -z "$c_interval" ]; then
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echo "Default and source specific interval missing. Skipping."
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exit 1
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fi
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fi
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#
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# Source checks
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#
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if [ ! -f "$c_source" ]; then
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echo "Source description $c_source is not a file. Skipping."
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exit 1
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else
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source=$(cat "$c_source")
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if [ $? -ne 0 ]; then
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echo "Skipping: Source $c_source is not readable"
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exit 1
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fi
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fi
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#
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# destination _must_ be a directory
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#
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if [ ! -d "$c_dest" ]; then
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echo "Destination $c_dest does not link to a directory. Skipping"
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exit 1
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fi
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#
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# exclude list
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#
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if [ -f "$c_exclude" ]; then
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EXCLUDE="--exclude-from=$c_exclude"
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fi
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#
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# extra options for rsync
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#
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if [ -f "$c_rsync_extra" ]; then
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RSYNC_EXTRA="$(cat "$c_rsync_extra")"
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fi
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#
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# Output a summary
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#
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if [ -f "$c_summary" ]; then
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SUMMARY="--stats"
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fi
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#
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# Verbosity for rsync
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#
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if [ -f "$c_verbose" ]; then
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VERBOSE="-v"
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fi
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#
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# MORE verbosity, includes standard verbosity
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#
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if [ -f "$c_vverbose" ]; then
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VERBOSE="-v"
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VVERBOSE="-v"
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fi
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#
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# check if maximum number of backups is reached, if so remove
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#
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# the created directories are named $INTERVAL-$DATE-$TIME.$PID
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count=$(ls -d "$c_dest/${INTERVAL}."?* 2>/dev/null | wc -l | sed 's/^ *//g')
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echo -n "Currently $count backup(s) exist(s),"
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echo " total keeping $c_interval backup(s)."
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if [ "$count" -ge "$c_interval" ]; then
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substract=$(echo $c_interval - 1 | bc)
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remove=$(echo $count - $substract | bc)
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echo "Removing $remove backup(s)..."
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ls -d "$c_dest/${INTERVAL}."?* | sort -n | head -n $remove > "$TMP"
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while read to_remove; do
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dir="$to_remove"
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echo "Removing $dir ..."
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rm $VVERBOSE -rf "$dir"
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done < "$TMP"
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fi
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#
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# clone the old directory with hardlinks
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#
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destination_date=$($CDATE)
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destination_dir="$c_dest/${INTERVAL}.${destination_date}.$$"
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last_dir=$(ls -d "$c_dest/${INTERVAL}."?* 2>/dev/null | sort -n | tail -n 1)
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# give some info
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echo "Beginning to backup, this may take some time..."
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echo "Creating $destination_dir ..."
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mkdir $VVERBOSE "$destination_dir"
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# only copy if a directory exists
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if [ "$last_dir" ]; then
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echo "$($DDATE) Hard linking..."
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cd "$last_dir"
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pax -rwl -p e $VVERBOSE . "$destination_dir"
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# old, gnu cp specific
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# cp -al $VVERBOSE "$last_dir" "$destination_dir"
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fi
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if [ $? -ne 0 ]; then
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echo -n "$($DDATE) Creating/cloning backup directory failed."
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echo " Skipping backup."
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exit 1
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fi
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#
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# the rsync part
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# options partly stolen from rsnapshot
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#
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echo "$($DDATE) Transferring files..."
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rsync -a $VERBOSE $RSYNC_EXTRA $EXCLUDE $SUMMARY \
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--delete --numeric-ids --relative --delete-excluded \
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"$source" "$destination_dir"
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if [ "$?" -ne 0 ]; then
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echo "rsync reported an error. The backup may be broken (see rsync errors)"
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fi
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echo "$($DDATE) Finished backup"
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#
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# post_exec
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#
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if [ -x "$c_post_exec" ]; then
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echo "$($DDATE) Executing $c_post_exec ..."
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"$c_post_exec"
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echo "$($DDATE) Finished ${c_post_exec}."
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if [ $? -ne 0 ]; then
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echo "$c_post_exec failed."
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fi
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fi
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end_s=$(date +%s)
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full_seconds=$(echo "$end_s - $begin_s" | bc -l)
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hours=$(echo $full_seconds / 3600 | bc)
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seconds=$(echo "$full_seconds - ($hours * 3600)" | bc)
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minutes=$(echo $seconds / 60 | bc)
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seconds=$(echo "$seconds - ($minutes * 60)" | bc)
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echo "Backup lasted: ${hours}:${minutes}:${seconds} (h:m:s)"
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) | add_name
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done
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#
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# Be a good parent and wait for our children, if they are running wild parallel
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#
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if [ "$PARALLEL" ]; then
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echo "$($DDATE) Waiting for child jobs to complete..."
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wait
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fi
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#
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# Look for post-exec command (general)
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#
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if [ -x "$CPOSTEXEC" ]; then
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echo "$($DDATE) Executing $CPOSTEXEC ..."
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"$CPOSTEXEC"
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echo "$($DDATE) Finished ${CPOSTEXEC}."
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if [ $? -ne 0 ]; then
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echo "$CPOSTEXEC failed."
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fi
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fi
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rm -f "$TMP"
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echo "==> Finished $WE <=="
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