What's the easiest way to do this from my bash prompt?
I know that I can drop a database using below:
mongo <dbname> --eval "db.dropDatabase()"
I want to do the same for a collection preferably in a shell script or python script and not from mongodb console.
What I am trying to achieve is first take a mongodump of the collection and then drop the collection:
Command I am using for dump:
mongodump --db database --collection collection_03-11-2016 --out /home/mongodump
You can write a javascript file with multiple commands in it and give that to the mongo command for execution.
Let's say, you create a js file called delete_collection.js as follows:
use foo //DB name - foo
db.bar.drop() //Collection drop (collection name - bar)
Then, you can run the following command from bash/terminal to execute it.
$ mongo < delete_collection.js
Mongo shell version: 3.0.4
Connecting to: test
switched to db foo
true
bye
$
To answer my own question, I had mongo collections according to dates in a db and wanted a shell script to backup and delete collection older than 10 days.
Using Abhay PS's script, I wrote the following .sh script:
#!/bin/bash
MONGO_DATABASE="db_name"
APP_NAME="collection_name_"
MONGO_HOST="127.0.0.1"
MONGO_PORT="27017"
TIMESTAMP=`date +%F -d "10 days ago"`
MONGODUMP_PATH="/usr/bin/mongodump"
BACKUPS_DIR="/home/user/mongodump/$TIMESTAMP"
BACKUP_NAME="$APP_NAME$TIMESTAMP"
MONGO_PATH="/usr/bin/mongo"
$MONGODUMP_PATH -d $MONGO_DATABASE -c $BACKUP_NAME
mkdir -p $BACKUPS_DIR
mv dump $BACKUP_NAME
tar -zcvf $BACKUPS_DIR/$BACKUP_NAME.tgz $BACKUP_NAME
rm -rf $BACKUP_NAME
$MONGO_PATH --eval "db=db.getSiblingDB('${MONGO_DATABASE}'); db['${BACKUP_NAME}'].drop();"
One can also pass the path and zip parameters in the mongodump option using -o
