mongodb 复制集secondary上运行的备份脚本

#!/bin/bash
set -e
BACKUP_DIR="/goluk/backup/mongo"
MONGO_HOST="db03"
MONGO_DB="trip"
MONGO_DUMP_CMD="mongodump  "
NUM=0
MONGO_EXCLUDE="trip_track"
BACK_FILE="$BACKUP_DIR/$MONGO_DB-$(date +%Y%m%d-%H%M).gz"
CMD="$BACKUP_DIR/$MONGO_DB-$(date +%Y%m%d-%H%M).CMD"
ALERTING="[e-mail]"
error_trap() {

  echo " [LINE:$1] Error." |mail -s "mongodb backup failed" $ALERTING
  rm -fr $BACK_FILE $CMD
}
get_max_track_table() {
  id2=`mongo <<EOF
  use trip
  rs.slaveOk()
  db.trip_track_table.find({},{"id" : 1 , "_id" : 0}).sort({"id" : -1}).limit(1)
EOF`
echo $id2
}
set_exclude() {

  NUM=`echo $id2 |awk -F':| ' '{print $18}'`
  NUM2=`expr $NUM - 1 `
  MONGO_EXCLUDE="--excludeCollection=trip_track  --excludeCollection=trip_track_{0..$NUM2}"
  echo $MONGO_EXCLUDE
}


main() {
  trap 'error_trap $LINENO' ERR
  get_max_track_table
  set_exclude
  echo "$MONGO_DUMP_CMD -h $MONGO_HOST:27017 -d $MONGO_DB $MONGO_EXCLUDE  --gzip --archive=$BACK_FILE" >$CMD
  sh < $CMD
  rm -f $CMD
}
main