# -*- mode:sh -*- # Little common functions # push a mirror attached to us. # Arguments (using an array named SIGNAL_OPTS): # # $MIRROR - Name for the mirror, also basename for the logfile # $HOSTNAME - Hostname to push to # $USERNAME - Username there # $SSHPROTO - Protocol version, either 1 or 2. # $SSHKEY - the ssh private key file to use for this push # $SSHOPTS - any other option ssh accepts, passed blindly, be careful # $PUSHLOCKOWN - own lockfile name to touch after stage1 in pushtype=staged # $PUSHTYPE - what kind of push should be done? # all - normal, just push once with ssh backgrounded and finish # staged - staged. first push stage1, then wait for $PUSHLOCKs to appear, # then push stage2 # $PUSHARCHIVE - what archive to sync? (Multiple mirrors behind one ssh key!) # $PUSHCB - do we want a callback? # # This function assumes that the variable LOG is set to a directory where # logfiles can be written to. # Additionally $PUSHLOCKS has to be defined as a set of space delimited strings # (list of "lock"files) to wait for if you want pushtype=staged # # Pushes might be done in background (for type all). signal () { ARGS="SIGNAL_OPTS[*]" local ${!ARGS} MIRROR=${MIRROR:-""} HOSTNAME=${HOSTNAME:-""} USERNAME=${USERNAME:-""} SSHPROTO=${SSHPROTO:-""} SSHKEY=${SSHKEY:-""} SSHOPTS=${SSHOPTS:-""} PUSHLOCKOWN=${PUSHLOCKOWN:-""} PUSHTYPE=${PUSHTYPE:-"all"} PUSHARCHIVE=${PUSHARCHIVE:-""} PUSHCB=${PUSHCB:-""} # And now get # back to space... SSHOPTS=${SSHOPTS/\#/ } # Defaults we always want, no matter what SSH_OPTIONS="-o user=${USERNAME} -o BatchMode=yes -o SetupTimeOut=45 -o ConnectTimeout=45 -o PasswordAuthentication=no" if [ -n "${SSH_OPTS}" ]; then SSH_OPTIONS="${SSH_OPTIONS} ${SSH_OPTS}" fi if [ -n "${SSHKEY}" ]; then SSH_OPTIONS="${SSH_OPTIONS} -i ${SSHKEY}" fi if [ -n "${SSHOPTS}" ]; then SSH_OPTIONS="${SSH_OPTIONS} ${SSHOPTS}" fi if [ ${SSHPROTO} -ne 1 ] && [ ${SSHPROTO} -ne 2 ] && [ ${SSHPROTO} -ne 99 ]; then # Idiots, we only want 1 or 2. Cant decide? Lets force 2. SSHPROTO=2 fi if [ -n "${SSHPROTO}" ] && [ ${SSHPROTO} -ne 99 ]; then SSH_OPTIONS="${SSH_OPTIONS} -${SSHPROTO}" fi date -u >> "${LOGDIR}/${MIRROR}.log" PUSHARGS="" if [ -n "${PUSHARCHIVE}" ]; then PUSHARGS="${PUSHARGS} sync:archive:${PUSHARCHIVE}" fi if [ -n "${PUSHCB}" ]; then PUSHARGS="${PUSHARGS} sync:callback" fi if [ "xallx" = "x${PUSHTYPE}x" ]; then # Default normal "fire and forget" push echo "Sending normal push" >> "${LOGDIR}/${MIRROR}.log" PUSHARGS1="sync:all" ssh $SSH_OPTIONS "${HOSTNAME}" "${PUSHARGS} ${PUSHARGS1}" >>"${LOGDIR}/${MIRROR}.log" 2>&1 & elif [ "xstagedx" = "x${PUSHTYPE}x" ]; then # Want a staged push. Fine, lets do that echo "Sending staged push" >> "${LOGDIR}/${MIRROR}.log" # Step1: Do a push to only sync stage1, do not background PUSHARGS1="sync:stage1" ssh $SSH_OPTIONS "${HOSTNAME}" "${PUSHARGS} ${PUSHARGS1}" >>"${LOGDIR}/${MIRROR}.log" 2>&1 touch "${PUSHLOCKOWN}" # Step2: Wait for all the other "lock"files to appear. tries=0 # We do not wait forever while [ ${tries} -lt ${PUSHDELAY} ]; do total=0 found=0 for file in ${PUSHLOCKS}; do total=$((total + 1)) if [ -f ${file} ]; then found=$((found + 1)) fi done if [ ${total} -eq ${found} ] || [ -f "${LOCKDIR}/all_stage1" ]; then touch "${LOCKDIR}/all_stage1" break fi tries=$((tries + 5)) sleep 5 done # In case we did not have all PUSHLOCKS and still continued, note it # This is a little racy, especially if the other parts decide to do this # at the same time, but it wont hurt more than a mail too much, so I don't care much if [ ${tries} -ge ${PUSHDELAY} ]; then echo "Failed to wait for all other mirrors. Failed ones are:" >> "${LOGDIR}/${MIRROR}.log" for file in ${PUSHLOCKS}; do if [ ! -f ${file} ]; then echo "${file}" >> "${LOGDIR}/${MIRROR}.log" error "Missing Pushlockfile ${file} after waiting ${tries} second, continuing" fi done fi rm -f "${PUSHLOCKOWN}" # Step3: It either timed out or we have all the "lock"files, sync stage2 PUSHARGS2="sync:stage2" echo "Now doing the second stage push" >> "${LOGDIR}/${MIRROR}.log" ssh $SSH_OPTIONS "${HOSTNAME}" "${PUSHARGS} ${PUSHARGS2}" >>"${LOGDIR}/${MIRROR}.log" 2>&1 else # Can't decide? Then you get nothing. return fi } # callback, used by ftpsync callback () { # Defaults we always want, no matter what SSH_OPTIONS="-o BatchMode=yes -o SetupTimeOut=45 -o ConnectTimeout=45 -o PasswordAuthentication=no" ssh $SSH_OPTIONS -i "$3" -o"user $1" "$2" callback:${HOSTNAME} } # log something (basically echo it together with a timestamp) # # Set $PROGRAM to a string to have it added to the output. log () { if [ -z "${PROGRAM}" ]; then echo "$(date +"%b %d %H:%M:%S") $(hostname -s) [$$] $@" else echo "$(date +"%b %d %H:%M:%S") $(hostname -s) ${PROGRAM}[$$]: $@" fi } # log the message using log() but then also send a mail # to the address configured in MAILTO (if non-empty) error () { log "$@" if [ -z "${MAILTO}" ]; then echo "$@" | mail -e -s "[$PROGRAM@$(hostname -s)] ERROR [$$]" ${MAILTO} fi } # run a hook # needs array variable HOOK setup with HOOKNR being a number an HOOKSCR # the script to run. hook () { ARGS='HOOK[@]' local "${!ARGS}" if [ -n "${HOOKSCR}" ]; then log "Running hook $HOOKNR: ${HOOKSCR}" set +e ${HOOKSCR} result=$? set -e log "Back from hook $HOOKNR, got returncode ${result}" return $result else return 0 fi } # Return the list of 2-stage mirrors. get2stage() { egrep '^staged' "${MIRRORS}" | { while read MTYPE MLNAME MHOSTNAME MUSER MPROTO MKEYFILE; do PUSHLOCKS="${LOCKDIR}/${MLNAME}.stage1 ${PUSHLOCKS}" done echo "$PUSHLOCKS" } } # Rotate logfiles savelog() { torotate="$1" count=${2:-${LOGROTATE}} while [ ${count} -gt 0 ]; do prev=$(( count - 1 )) if [ -e "${torotate}.${prev}" ]; then mv "${torotate}.${prev}" "${torotate}.${count}" fi count=$prev done mv "${torotate}" "${torotate}.0" }