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ccollect/ccollect.sh
Nico Schottelius 8f65880db5 Cleanups, cleanups, cleanups, ...
2007-08-16 21:37:39 +02:00

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#!/bin/sh
# Nico Schottelius
# Initially written for SyGroup (www.sygroup.ch)
# Date: Mon Nov 14 11:45:11 CET 2005
# Last Modified: (See ls -l or git)
#
# where to find our configuration and temporary file
#
CCOLLECT_CONF=${CCOLLECT_CONF:-/etc/ccollect}
CSOURCES=${CCOLLECT_CONF}/sources
CDEFAULTS=${CCOLLECT_CONF}/defaults
CPREEXEC="${CDEFAULTS}/pre_exec"
CPOSTEXEC="${CDEFAULTS}/post_exec"
TMP=$(mktemp "/tmp/$(basename $0).XXXXXX")
VERSION=0.6
RELEASE="2007-08-16/17"
HALF_VERSION="ccollect ${VERSION}"
FULL_VERSION="ccollect ${VERSION} (${RELEASE})"
#
# CDATE: how we use it for naming of the archives
# DDATE: how the user should see it in our output (DISPLAY)
#
CDATE="date +%Y%m%d-%H%M"
DDATE="date +%Y-%m-%d-%H:%M:%S"
#
# unset parallel execution
#
PARALLEL=""
#
# catch signals
#
trap "rm -f \"${TMP}\"" 1 2 15
#
# Functions
#
# time displaying echo
_techo()
{
echo "$(${DDATE}): $@"
}
# exit on error
_exit_err()
{
_techo "$@"
rm -f "${TMP}"
exit 1
}
add_name()
{
sed "s:^:\[${name}\] :"
}
#
# Tell how to use us
#
usage()
{
echo "$(basename $0): <interval name> [args] <sources to backup>"
echo ""
echo " ccollect creates (pseudo) incremental backups"
echo ""
echo " -h, --help: Show this help screen"
echo " -p, --parallel: Parallelise backup processes"
echo " -a, --all: Backup all sources specified in ${CSOURCES}"
echo " -v, --verbose: Be very verbose (uses set -x)"
echo ""
echo " This is version ${VERSION}, released on ${RELEASE}"
echo " (the first version was written on 2005-12-05 by Nico Schottelius)."
echo ""
echo " Retrieve latest ccollect at http://unix.schottelius.org/ccollect/"
exit 0
}
#
# need at least interval and one source or --all
#
if [ $# -lt 2 ]; then
usage
fi
#
# check for configuraton directory
#
[ -d "${CCOLLECT_CONF}" ] || _exit_err "No configuration found in " \
"\"${CCOLLECT_CONF}\" (is \$CCOLLECT_CONF properly set?)"
#
# Filter arguments
#
export INTERVAL="$1"; shift
i=1
no_sources=0
#
# Create source "array"
#
while [ "$#" -ge 1 ]; do
eval arg=\"\$1\"; shift
if [ "${NO_MORE_ARGS}" = 1 ]; then
eval source_${no_sources}=\"${arg}\"
no_sources=$((${no_sources}+1))
# make variable available for subscripts
eval export source_${no_sources}
else
case "${arg}" in
-a|--all)
ALL=1
;;
-v|--verbose)
VERBOSE=1
;;
-p|--parallel)
PARALLEL=1
;;
-h|--help)
usage
;;
--)
NO_MORE_ARGS=1
;;
*)
eval source_${no_sources}=\"$arg\"
no_sources=$(($no_sources+1))
;;
esac
fi
i=$(($i+1))
done
# also export number of sources
export no_sources
#
# be really, really, really verbose
#
if [ "${VERBOSE}" = 1 ]; then
set -x
fi
#
# Look, if we should take ALL sources
#
if [ "${ALL}" = 1 ]; then
# reset everything specified before
no_sources=0
#
# get entries from sources
#
cwd=$(pwd -P)
( cd "${CSOURCES}" && ls > "${TMP}" ); ret=$?
[ "${ret}" -eq 0 ] || _exit_err "Listing of sources failed. Aborting."
while read tmp; do
eval source_${no_sources}=\"${tmp}\"
no_sources=$((${no_sources}+1))
done < "${TMP}"
fi
#
# Need at least ONE source to backup
#
if [ "${no_sources}" -lt 1 ]; then
usage
else
_techo "${HALF_VERSION}: Beginning backup using interval ${INTERVAL}"
fi
#
# Look for pre-exec command (general)
#
if [ -x "${CPREEXEC}" ]; then
_techo "Executing ${CPREEXEC} ..."
"${CPREEXEC}"; ret=$?
_techo "Finished ${CPREEXEC} (return code: ${ret})."
[ "${ret}" -eq 0 ] || _exit_err "${CPREEXEC} failed. Aborting"
fi
#
# check default configuration
#
D_FILE_INTERVAL="${CDEFAULTS}/intervals/${INTERVAL}"
D_INTERVAL=$(cat "${D_FILE_INTERVAL}" 2>/dev/null)
#
# Let's do the backup
#
i=0
while [ "${i}" -lt "${no_sources}" ]; do
#
# Get current source
#
eval name=\"\$source_${i}\"
i=$((${i}+1))
export name
#
# start ourself, if we want parallel execution
#
if [ "${PARALLEL}" ]; then
"$0" "${INTERVAL}" "${name}" &
continue
fi
#
# Start subshell for easy log editing
#
(
#
# Stderr to stdout, so we can produce nice logs
#
exec 2>&1
#
# Configuration
#
backup="${CSOURCES}/${name}"
c_source="${backup}/source"
c_dest="${backup}/destination"
c_exclude="${backup}/exclude"
c_verbose="${backup}/verbose"
c_vverbose="${backup}/very_verbose"
c_rsync_extra="${backup}/rsync_options"
c_summary="${backup}/summary"
c_pre_exec="${backup}/pre_exec"
c_post_exec="${backup}/post_exec"
c_incomplete="${backup}/delete_incomplete"
#
# Marking backups: If we abort it's not removed => Backup is broken
#
c_marker=".ccollect-marker"
#
# Times
#
begin_s=$(date +%s)
#
# unset possible options
#
EXCLUDE=""
RSYNC_EXTRA=""
SUMMARY=""
VERBOSE=""
VVERBOSE=""
DELETE_INCOMPLETE=""
_techo "Beginning to backup"
#
# Standard configuration checks
#
if [ ! -e "${backup}" ]; then
_exit_err "Source does not exist."
fi
#
# configuration _must_ be a directory
#
if [ ! -d "${backup}" ]; then
_exit_err "\"${name}\" is not a cconfig-directory. Skipping."
fi
#
# first execute pre_exec, which may generate destination or other
# parameters
#
if [ -x "${c_pre_exec}" ]; then
_techo "Executing ${c_pre_exec} ..."
"${c_pre_exec}"; ret="$?"
_techo "Finished ${c_pre_exec} (return code ${ret})."
if [ "${ret}" -ne 0 ]; then
_exit_err "${c_pre_exec} failed. Skipping."
fi
fi
#
# interval definition: First try source specific, fallback to default
#
c_interval="$(cat "${backup}/intervals/${INTERVAL}" 2>/dev/null)"
if [ -z "${c_interval}" ]; then
c_interval="${D_INTERVAL}"
if [ -z "${c_interval}" ]; then
_exit_err "No definition for interval \"${INTERVAL}\" found. Skipping."
fi
fi
#
# Source checks
#
if [ ! -f "${c_source}" ]; then
_exit_err "Source description \"${c_source}\" is not a file. Skipping."
else
source=$(cat "${c_source}"); ret=$?
if [ ${ret} -ne 0 ]; then
_exit_err "Source ${c_source} is not readable. Skipping."
fi
fi
#
# destination _must_ be a directory
#
if [ ! -d "${c_dest}" ]; then
_exit_err "Destination ${c_dest} is not a directory. Skipping."
fi
#
# Check whether to delete incomplete backups
#
if [ -f "${c_incomplete}" ]; then
DELETE_INCOMPLETE="yes"
fi
#
# Verbosity for rsync
# NEW method as of 0.6:
# - insert ccollect default parameters
# - insert options
# - insert user options
#
# rsync standard options
#
set -- "$@" "--archive" "--delete" "--numeric-ids" "--relative" \
"--delete-excluded" "--sparse"
#
# exclude list
#
if [ -f "${c_exclude}" ]; then
set -- "$@" "--exclude-from=${c_exclude}"
fi
#
# Output a summary
#
if [ -f "${c_summary}" ]; then
set -- "$@" "--stats"
fi
#
# Verbosity for rsync
#
if [ -f "${c_vverbose}" ]; then
set -- "$@" "-vv"
elif [ -f "${c_verbose}" ]; then
set -- "$@" "-v"
fi
#
# extra options for rsync provided by the user
#
if [ -f "${c_rsync_extra}" ]; then
while read line; do
set -- "$@" "$line"
done < "${c_rsync_extra}"
fi
#
# Check for incomplete backups
#
( cd "${c_dest}" 2>/dev/null && ls -1 "${INTERVAL}"*"/${c_marker}" > "${TMP}" 2>/dev/null)
while read incomplete; do
realincomplete=$(echo ${incomplete} | sed "s/${c_marker}\$//")
_techo "Incomplete backup: ${realincomplete}"
if [ "${DELETE_INCOMPLETE}" = "yes" ]; then
_techo "Deleting ${realincomplete} ..."
rm $VVERBOSE -rf "${c_dest}/${realincomplete}" || \
_exit_err "Removing ${c_dest}/${realincomplete} failed."
fi
done < "${TMP}"
#
# check if maximum number of backups is reached, if so remove
# use grep and ls -p so we only look at directories
#
count=$(cd "${c_dest}" && ls -p1 | grep "^${INTERVAL}\..*/\$" | wc -l \
| sed 's/^ *//g') || _exit_err "Counting backups failed"
_techo "Existing backups: ${count} Total keeping backups: ${c_interval}"
if [ "${count}" -ge "${c_interval}" ]; then
substract=$((${c_interval} - 1))
remove=$((${count} - ${substract}))
_techo "Removing ${remove} backup(s)..."
( cd "${c_dest}" 2>/dev/null && ls -p1 | grep "^${INTERVAL}\..*/\$" | \
sort -n | head -n "${remove}" > "${TMP}" )
while read to_remove; do
_techo "Removing ${to_remove} ..."
rm ${VVERBOSE} -rf "$to_remove" || \
_exit_err "Removing ${to_remove} failed."
done < "${TMP}"
fi
#
# Check for backup directory to clone from
#
# try our interval
last_dir="$(ls -d "${c_dest}/${INTERVAL}."?* 2>/dev/null | sort -n | tail -n 1)"
# try other intervals, if there's none four our interval
if [ -z "${last_dir}" ]; then
_techo "Did not find existing backups for interval ${INTERVAL}."
# get list
: > "${TMP}"
( cd "${backup}/intervals/" 2>/dev/null && ls >> "${TMP}" )
( cd "${CDEFAULTS}/intervals/" 2>/dev/null && ls >> "${TMP}" )
# FIXME in 0.6.1: choose best source, not first one.
while read other_interval; do
last_dir="$(ls -d "${c_dest}/${other_interval}."?* 2>/dev/null | sort -n | tail -n 1)"
if [ "${last_dir}" ]; then
_techo "Using backup from ${other_interval}."
break
fi
done < "${TMP}"
fi
#
# clone from old backup, if existing
#
if [ "${last_dir}" ]; then
abs_last_dir="$(cd "${last_dir}" && pwd -P)" || _exit_err "Could not change to last dir ${last_dir}."
set -- "$@" "--link-dest=${abs_last_dir}"
fi
# set time when we really begin to backup, not when we began to remove above
destination_date=$(${CDATE})
destination_dir="${c_dest}/${INTERVAL}.${destination_date}.$$"
# give some info
_techo "Beginning to backup, this may take some time..."
echo "Creating ${destination_dir} ..."
mkdir ${VVERBOSE} "${destination_dir}" || \
_exit_err "Creating ${destination_dir} failed. Skipping."
# absulte now, it's existing
abs_destination_dir="$(cd "${destination_dir}" && pwd -P)"
#
# added marking in 0.6 (and remove it, if successful later)
#
touch "${abs_destination_dir}/${c_marker}"
#
# the rsync part
# options partly stolen from rsnapshot
#
_techo "Transferring files..."
rsync "$@" "${source}" "${abs_destination_dir}"; ret=$?
#
# remove marking here
#
rm -f "${abs_destination_dir}/${c_marker}" || \
_exit_err "Removing ${abs_destination_dir}/${c_marker} failed."
_techo "Finished backup (rsync return code: $ret)."
if [ "$ret" -ne 0 ]; then
_techo "Warning: rsync exited non-zero, the backup may be broken (see rsync errors)."
fi
#
# post_exec
#
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 [ ${ret} -ne 0 ]; then
_echo "${CPOSTEXEC} failed."
fi
fi
rm -f "${TMP}"
_techo "Finished ${WE}"
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