Menu
I have replica set of 3 nodes and I want to run a cleanup script against it every end of day. What I would do if there was only single node would be a simple bash script:
~/mongo/bin/mongo host:port cleanupScript.js
But since I want to run the same script against replica-set I can't use this approach. I would need to somehow find which node is primary and run the script against that node.
So the question: Is there a way how to run the script against whole replica set and let the mongo process pick the primary node and execute on it?
Thanks!
942
On port 27017, it will launch a mongod instance with the name rs0. Connect to this mongod instance using the command prompt. To start a new replica set, use the Mongo client function rs. initiate().
MongoDB handles replication through a Replica Set, which consists of multiple MongoDB nodes that are grouped together as a unit. A Replica Set requires a minimum of three MongoDB nodes: One of the nodes will be considered the primary node that receives all the write operations.
The mongo shell can connect directly to a replica set - this works with 2.4 (current), 2.2 (previous) and 2.0 (the version before that).
Assuming you have a replica set called myrs and your hosts are host1:27017 and host2:27017, use the following syntax:
mongo --host myrs/host1:27017,host2:27017
The shell will figure out the rest, including connecting to the primary and if the primary steps down or goes away it will reconnect to the new primary once it's elected.
88
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
