a030a98982
> # Verify source is up and accepting connections before deleting any old backups
> rsync "$source" >/dev/null || _exit_err "Source ${source} is not readable. Skipping."
I think that this quick test is a much better than, say, pinging
the source in a pre-exec script: this tests not only that the
source is up and connected to the net, it also verifies (1) that
ssh is up and accepting our key (if we are using ssh), and (2) that
the source directory is mounted (if it needs to be mounted) and
readable.
617 lines
14 KiB
Bash
Executable file
617 lines
14 KiB
Bash
Executable file
#!/bin/sh
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#
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# 2005-2009 Nico Schottelius (nico-ccollect at schottelius.org)
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#
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# This file is part of ccollect.
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#
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# ccollect is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# ccollect is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with ccollect. If not, see <http://www.gnu.org/licenses/>.
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#
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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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#
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# Standard variables (stolen from cconf)
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#
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__pwd="$(pwd -P)"
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__mydir="${0%/*}"; __abs_mydir="$(cd "$__mydir" && pwd -P)"
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__myname=${0##*/}; __abs_myname="$__abs_mydir/$__myname"
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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/${__myname}.XXXXXX")
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VERSION=0.7.1
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RELEASE="2009-02-02"
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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 "${TMP}"
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exit 1
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}
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add_name()
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{
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awk "{ print \"[${name}] \" \$0 }"
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}
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pcmd()
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{
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if [ "$remote_host" ]; then
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ssh "$remote_host" "$@"
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else
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"$@"
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fi
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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 "${FULL_VERSION}"
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exit 0
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}
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#
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# Tell how to use us
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#
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usage()
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{
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echo "${__myname}: <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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f_incomplete="delete_incomplete"
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c_incomplete="${backup}/${f_incomplete}"
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c_remote_host="${backup}/remote_host"
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#
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# Marking backups: If we abort it's not removed => Backup is broken
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#
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c_marker=".ccollect-marker"
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#
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# Times
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#
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begin_s=$(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 ${c_source} is not readable. Skipping."
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fi
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fi
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# Verify source is up and accepting connections before deleting any old backups
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rsync "$source" >/dev/null || _exit_err "Source ${source} is not readable. Skipping."
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#
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# Destination is a path
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#
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if [ ! -f "${c_dest}" ]; then
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_exit_err "Destination ${c_dest} is not a file. Skipping."
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else
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ddir=$(cat "${c_dest}"); ret="$?"
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if [ "${ret}" -ne 0 ]; then
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_exit_err "Destination ${c_dest} is not readable. Skipping."
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fi
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fi
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#
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# do we backup to a remote host? then set pre-cmd
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#
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if [ -f "${c_remote_host}" ]; then
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# adjust ls and co
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remote_host=$(cat "${c_remote_host}"); ret="$?"
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if [ "${ret}" -ne 0 ]; then
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_exit_err "Remote host file ${c_remote_host} exists, but is not readable. Skipping."
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fi
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destination="${remote_host}:${ddir}"
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else
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remote_host=""
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destination="${ddir}"
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fi
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export remote_host
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#
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# check for existence / use real name
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#
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( pcmd cd "$ddir" ) || _exit_err "Cannot change to ${ddir}. Skipping."
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#
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# Check whether to delete incomplete backups
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#
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if [ -f "${c_incomplete}" -o -f "${CDEFAULTS}/${f_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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pcmd ls -1 "$ddir/${INTERVAL}"*".${c_marker}" > "${TMP}" 2>/dev/null
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i=0
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while read incomplete; do
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eval incomplete_$i=\"$(echo ${incomplete} | sed "s/\\.${c_marker}\$//")\"
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i=$(($i+1))
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done < "${TMP}"
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j=0
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while [ "$j" -lt "$i" ]; do
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eval realincomplete=\"\$incomplete_$j\"
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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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pcmd rm $VVERBOSE -rf "${ddir}/${realincomplete}" || \
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_exit_err "Removing ${realincomplete} failed."
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fi
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j=$(($j+1))
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done
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#
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# check if maximum number of backups is reached, if so remove
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# use grep and ls -p so we only look at directories
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#
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count="$(pcmd ls -p1 "${ddir}" | grep "^${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 ${remove} backup(s)..."
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pcmd ls -p1 "$ddir" | grep "^${INTERVAL}\..*/\$" | \
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sort -n | head -n "${remove}" > "${TMP}" || \
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_exit_err "Listing old backups failed"
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i=0
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while read to_remove; do
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eval remove_$i=\"${to_remove}\"
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i=$(($i+1))
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done < "${TMP}"
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j=0
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while [ "$j" -lt "$i" ]; do
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eval to_remove=\"\$remove_$j\"
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_techo "Removing ${to_remove} ..."
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pcmd rm ${VVERBOSE} -rf "${ddir}/${to_remove}" || \
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_exit_err "Removing ${to_remove} failed."
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j=$(($j+1))
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done
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fi
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#
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# Check for backup directory to clone from: Always clone from the latest one!
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#
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# Use ls -1c instead of -1t, because last modification maybe the same on all
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# and metadate update (-c) is updated by rsync locally.
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#
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last_dir="$(pcmd ls -tcp1 "${ddir}" | grep '/$' | head -n 1)" || \
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_exit_err "Failed to list contents of ${ddir}."
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#
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# clone from old backup, if existing
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#
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if [ "${last_dir}" ]; then
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set -- "$@" "--link-dest=${ddir}/${last_dir}"
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_techo "Hard linking from ${last_dir}"
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fi
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# set time when we really begin to backup, not when we began to remove above
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destination_date=$(${CDATE})
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destination_dir="${ddir}/${INTERVAL}.${destination_date}.$$"
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destination_full="${destination}/${INTERVAL}.${destination_date}.$$"
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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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pcmd mkdir ${VVERBOSE} "${destination_dir}" || \
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_exit_err "Creating ${destination_dir} failed. Skipping."
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#
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# added marking in 0.6 (and remove it, if successful later)
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#
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pcmd touch "${destination_dir}.${c_marker}"
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#
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# the rsync part
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#
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_techo "Transferring files..."
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rsync "$@" "${source}" "${destination_full}"; ret=$?
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#
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# remove marking here
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#
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pcmd rm "${destination_dir}.${c_marker}" || \
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_exit_err "Removing ${destination_dir}/${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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|
#
|
|
if [ -x "${c_post_exec}" ]; then
|
|
_techo "Executing ${c_post_exec} ..."
|
|
"${c_post_exec}"; ret=$?
|
|
_techo "Finished ${c_post_exec}."
|
|
|
|
if [ ${ret} -ne 0 ]; then
|
|
_exit_err "${c_post_exec} failed."
|
|
fi
|
|
fi
|
|
|
|
# Calculation
|
|
end_s=$(date +%s)
|
|
|
|
full_seconds=$((${end_s} - ${begin_s}))
|
|
hours=$((${full_seconds} / 3600))
|
|
seconds=$((${full_seconds} - (${hours} * 3600)))
|
|
minutes=$((${seconds} / 60))
|
|
seconds=$((${seconds} - (${minutes} * 60)))
|
|
|
|
_techo "Backup lasted: ${hours}:${minutes}:${seconds} (h:m:s)"
|
|
|
|
) | add_name
|
|
done
|
|
|
|
#
|
|
# Be a good parent and wait for our children, if they are running wild parallel
|
|
#
|
|
if [ "${PARALLEL}" ]; then
|
|
_techo "Waiting for children to complete..."
|
|
wait
|
|
fi
|
|
|
|
#
|
|
# Look for post-exec command (general)
|
|
#
|
|
if [ -x "${CPOSTEXEC}" ]; then
|
|
_techo "Executing ${CPOSTEXEC} ..."
|
|
"${CPOSTEXEC}"; ret=$?
|
|
_techo "Finished ${CPOSTEXEC} (return code: ${ret})."
|
|
|
|
if [ ${ret} -ne 0 ]; then
|
|
_techo "${CPOSTEXEC} failed."
|
|
fi
|
|
fi
|
|
|
|
rm -f "${TMP}"
|
|
_techo "Finished ${WE}"
|