545 lines
12 KiB
Bash
545 lines
12 KiB
Bash
#!/bin/sh
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# Nico Schottelius
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# Initially 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=0.6.1
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RELEASE="2007-08-20"
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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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# CDATE: how we use it for naming of the archives
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# DDATE: how the user should see it in our output (DISPLAY)
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#
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CDATE="date +%Y%m%d-%H%M"
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DDATE="date +%Y-%m-%d-%H:%M:%S"
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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 \"${TMP}\"" 1 2 15
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#
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# Functions
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#
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# time displaying echo
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_techo()
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{
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echo "$(${DDATE}): $@"
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}
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# exit on error
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_exit_err()
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{
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_techo "$@"
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rm -f "${TMP}"
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exit 1
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}
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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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# Version
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#
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display_version()
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{
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echo "${FULL_VERSION}"
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exit 0
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}
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#
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# Tell how to use us
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#
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usage()
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{
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echo "$(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 " -V, --version: Print version information"
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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://unix.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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if [ "$1" = "-V" -o "$1" = "--version" ]; then
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display_version
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else
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usage
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fi
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fi
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#
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# check for configuraton directory
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#
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[ -d "${CCOLLECT_CONF}" ] || _exit_err "No configuration found in " \
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"\"${CCOLLECT_CONF}\" (is \$CCOLLECT_CONF properly set?)"
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#
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# Filter arguments
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#
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export INTERVAL="$1"; shift
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i=1
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no_sources=0
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#
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# Create source "array"
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#
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while [ "$#" -ge 1 ]; do
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eval arg=\"\$1\"; shift
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if [ "${NO_MORE_ARGS}" = 1 ]; then
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eval source_${no_sources}=\"${arg}\"
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no_sources=$((${no_sources}+1))
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# make variable available for subscripts
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eval export source_${no_sources}
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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}=\"$arg\"
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no_sources=$(($no_sources+1))
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;;
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esac
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fi
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i=$(($i+1))
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done
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# also export number of sources
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export no_sources
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#
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# be really, really, really verbose
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#
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if [ "${VERBOSE}" = 1 ]; then
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set -x
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fi
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#
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# Look, 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 -P)
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( cd "${CSOURCES}" && ls > "${TMP}" ); ret=$?
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[ "${ret}" -eq 0 ] || _exit_err "Listing of sources failed. Aborting."
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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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_techo "${HALF_VERSION}: Beginning backup using interval ${INTERVAL}"
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fi
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#
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# Look for pre-exec command (general)
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#
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if [ -x "${CPREEXEC}" ]; then
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_techo "Executing ${CPREEXEC} ..."
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"${CPREEXEC}"; ret=$?
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_techo "Finished ${CPREEXEC} (return code: ${ret})."
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[ "${ret}" -eq 0 ] || _exit_err "${CPREEXEC} failed. Aborting"
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fi
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#
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# check default configuration
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#
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D_FILE_INTERVAL="${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}" "${name}" &
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continue
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fi
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#
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# Start subshell for easy log editing
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#
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(
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#
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# Stderr to stdout, so we can produce nice logs
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#
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exec 2>&1
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#
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# Configuration
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#
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backup="${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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c_incomplete="${backup}/delete_incomplete"
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#
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# Marking backups: If we abort it's not removed => Backup is broken
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#
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c_marker=".ccollect-marker"
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#
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# Times
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#
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begin_s=$(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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DELETE_INCOMPLETE=""
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_techo "Beginning to backup"
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#
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# Standard configuration checks
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#
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if [ ! -e "${backup}" ]; then
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_exit_err "Source does not exist."
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fi
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#
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# configuration _must_ be a directory
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#
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if [ ! -d "${backup}" ]; then
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_exit_err "\"${name}\" is not a cconfig-directory. Skipping."
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fi
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#
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# first execute pre_exec, which may generate destination or other
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# parameters
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#
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if [ -x "${c_pre_exec}" ]; then
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_techo "Executing ${c_pre_exec} ..."
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"${c_pre_exec}"; ret="$?"
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_techo "Finished ${c_pre_exec} (return code ${ret})."
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if [ "${ret}" -ne 0 ]; then
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_exit_err "${c_pre_exec} failed. Skipping."
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fi
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fi
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#
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# interval definition: First try source specific, fallback to default
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#
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c_interval="$(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 "${c_interval}" ]; then
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_exit_err "No definition for interval \"${INTERVAL}\" found. Skipping."
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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 "${c_source}" ]; then
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_exit_err "Source description \"${c_source}\" is not a file. Skipping."
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else
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source=$(cat "${c_source}"); ret=$?
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if [ ${ret} -ne 0 ]; then
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_exit_err "Source ${c_source} is not readable. Skipping."
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fi
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fi
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#
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# destination _must_ be a directory
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#
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if [ ! -d "${c_dest}" ]; then
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_exit_err "Destination ${c_dest} is not a directory. Skipping."
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fi
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#
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# Check whether to delete incomplete backups
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#
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if [ -f "${c_incomplete}" ]; then
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DELETE_INCOMPLETE="yes"
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fi
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# NEW method as of 0.6:
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# - insert ccollect default parameters
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# - insert options
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# - insert user options
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#
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# rsync standard options
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#
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set -- "$@" "--archive" "--delete" "--numeric-ids" "--relative" \
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"--delete-excluded" "--sparse"
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#
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# exclude list
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#
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if [ -f "${c_exclude}" ]; then
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set -- "$@" "--exclude-from=${c_exclude}"
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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 "${c_summary}" ]; then
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set -- "$@" "--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 "${c_vverbose}" ]; then
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set -- "$@" "-vv"
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elif [ -f "${c_verbose}" ]; then
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set -- "$@" "-v"
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fi
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#
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# extra options for rsync provided by the user
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#
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if [ -f "${c_rsync_extra}" ]; then
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while read line; do
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set -- "$@" "$line"
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done < "${c_rsync_extra}"
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fi
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#
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# Check for incomplete backups
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#
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( cd "${c_dest}" 2>/dev/null && ls -1 "${INTERVAL}"*"/${c_marker}" > "${TMP}" 2>/dev/null)
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while read incomplete; do
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realincomplete=$(echo ${incomplete} | sed "s/${c_marker}\$//")
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_techo "Incomplete backup: ${realincomplete}"
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if [ "${DELETE_INCOMPLETE}" = "yes" ]; then
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_techo "Deleting ${realincomplete} ..."
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rm $VVERBOSE -rf "${c_dest}/${realincomplete}" || \
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_exit_err "Removing ${c_dest}/${realincomplete} failed."
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fi
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done < "${TMP}"
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#
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# check if maximum number of backups is reached, if so remove
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# use grep and ls -p so we only look at directories
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#
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count=$(cd "${c_dest}" && ls -p1 | grep "^${INTERVAL}\..*/\$" | wc -l \
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| sed 's/^ *//g') || _exit_err "Counting backups failed"
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_techo "Existing backups: ${count} Total keeping backups: ${c_interval}"
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if [ "${count}" -ge "${c_interval}" ]; then
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substract=$((${c_interval} - 1))
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remove=$((${count} - ${substract}))
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_techo "Removing ${remove} backup(s)..."
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( cd "${c_dest}" 2>/dev/null && ls -p1 | grep "^${INTERVAL}\..*/\$" | \
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sort -n | head -n "${remove}" > "${TMP}" )
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while read to_remove; do
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_techo "Removing ${to_remove} ..."
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rm ${VVERBOSE} -rf "$to_remove" || \
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_exit_err "Removing ${to_remove} failed."
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done < "${TMP}"
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fi
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#
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# Check for backup directory to clone from: Always clone from the latest one!
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#
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# Use ls -1c instead of -1t, because last modification maybe the same on all
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# and metadate update (-c) is updated by rsync locally.
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#
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rel_last_dir="$(cd "${c_dest}" && ls -tcp1 | grep '/$' | head -n 1)" || \
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_exit_err "Failed to list contents of ${c_dest}."
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last_dir="${c_dest}/${rel_last_dir}"
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#
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# clone from old backup, if existing
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#
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if [ "${last_dir}" ]; then
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# must be absolute, otherwise rsync uses it relative to
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# the destination directory. See rsync(1).
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abs_last_dir="$(cd "${last_dir}" && pwd -P)" || \
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_exit_err "Could not change to last dir ${last_dir}."
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set -- "$@" "--link-dest=${abs_last_dir}"
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_techo "Hard linking from ${rel_last_dir}"
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fi
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# set time when we really begin to backup, not when we began to remove above
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destination_date=$(${CDATE})
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destination_dir="${c_dest}/${INTERVAL}.${destination_date}.$$"
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# give some info
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_techo "Beginning to backup, this may take some time..."
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_techo "Creating ${destination_dir} ..."
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mkdir ${VVERBOSE} "${destination_dir}" || \
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_exit_err "Creating ${destination_dir} failed. Skipping."
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# absulte now, it's existing
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abs_destination_dir="$(cd "${destination_dir}" && pwd -P)" || \
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_exit_err "Changing to newly created ${destination_dir} failed. Skipping."
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#
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# added marking in 0.6 (and remove it, if successful later)
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#
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touch "${abs_destination_dir}/${c_marker}"
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#
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# the rsync part
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#
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_techo "Transferring files..."
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rsync "$@" "${source}" "${abs_destination_dir}"; ret=$?
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#
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# remove marking here
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#
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rm -f "${abs_destination_dir}/${c_marker}" || \
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_exit_err "Removing ${abs_destination_dir}/${c_marker} failed."
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_techo "Finished backup (rsync return code: $ret)."
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if [ "${ret}" -ne 0 ]; then
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_techo "Warning: rsync exited non-zero, the backup may be broken (see rsync errors)."
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fi
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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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_techo "Executing ${c_post_exec} ..."
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"${c_post_exec}"; ret=$?
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_techo "Finished ${c_post_exec}."
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if [ ${ret} -ne 0 ]; then
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_exit_err "${c_post_exec} failed."
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fi
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fi
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# Calculation
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end_s=$(date +%s)
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full_seconds=$((${end_s} - ${begin_s}))
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hours=$((${full_seconds} / 3600))
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seconds=$((${full_seconds} - (${hours} * 3600)))
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minutes=$((${seconds} / 60))
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seconds=$((${seconds} - (${minutes} * 60)))
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_techo "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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_techo "Waiting for children 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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_techo "Executing ${CPOSTEXEC} ..."
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"${CPOSTEXEC}"; ret=$?
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_techo "Finished ${CPOSTEXEC} (return code: ${ret})."
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if [ ${ret} -ne 0 ]; then
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_techo "${CPOSTEXEC} failed."
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fi
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fi
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rm -f "${TMP}"
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_techo "Finished ${WE}"
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