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I have a bash shell script which does a bunch of stuff before trying to mongorestore.
I want to make sure that not only MongoDB is up, but it is also ready to accept connections before i try restore.
Right now, what I am seeing is, mongo process is up but it take 45+ seconds to do the initial setup (setting up journal files etc) before it is ready to accept connections. Ideally I want to keep testing the connection in a loop and only when I am able to connect, I want to run mongorestore.
Can someone show me how to do this in Bash or point me in the right direction?
701
To open up the MongoDB shell, run the mongo command from your server prompt. By default, the mongo command opens a shell connected to a locally-installed MongoDB instance running on port 27017 . Try running the mongo command with no additional parameters: mongo.
To ensure that you have MongoDB installed correctly, run mongo --version and mongod --version . If you get an error for either, you'll need to go back and reinstall the database server. To start the server, run mongod --noauth --dbpath ~/mongo/data/db .
To test the connection in a loop like you suggest,
until nc -z localhost 27017
do
sleep 1
done
A solution using MongoDB Tools. Useful in a docker container or something similiar where you do not want to install nc.
until mongo --eval "print(\"waited for connection\")"
do
sleep 60
done
Based on that other guy's answer.
40
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