With MongoDB, replication is achieved through a replica set. Create the Replica Set. The MongoDB Community Kubernetes Operator is a Custom Resource Definition and a Controller. 1) On server 1 (mongodb001), open the mongodb.conf file in notepad from the C:\MongoDB\conf directory. To upgrade a replica set from an 3.2-series and earlier, first upgrade all members of the replica set to the latest 3.4-series release, and then follow the procedure to upgrade from MongoDB 3.4 to 3.6. To upgrade a replica set from an 3.6-series and earlier, first upgrade all members of the replica set to the latest 4.0-series release, and then follow the procedure to upgrade from MongoDB 4.0 to 4.2. Creates a StatefulSet that contains one pod for each replica set member. mongod --port 27017 --dbpath "D:\set up\mongodb\data" --replSet rs0 It will start a mongod instance with the name rs0, on port 27017. Set up. Table of Contents. replSet=mongors. Replica sets provide high availability for each shard and a mechanism, called Zone Sharding, is used to configure the set of data managed by each shard. I assume that you are already familiar with Kubernetes. What is MongoDB – Get to know about its history, MongoDB architecture & its components, drop database collections, like query with examples, difference between MongoDB and RDBMS. 2) Add the lines. Remember keyfile is a very basic authentication and is not recommended for production, even with keyfile rotation enabled. These are the steps for creating a MongoDB Replica Set. Replica failover is fully automated, eliminating the … MongoDB Community Kubernetes Operator Architecture. For production please use x.509 certs, if you are using MongoDB enterprise edition use LDAP proxy or kerboros for authentication, if not x.509 certs. 3) From the services window, restart the MongoDB service by right clicking on it and selecting restart If the primary server fails (through a crash or system failure), one of the secondary servers takes over and becomes the new primary node via election. Writer operations are sent to the primary server (node), which applies the operations across secondary servers, replicating the data. #Replica Set Name. In Mongo client, issue the command rs.initiate() to initiate a new replica set. A three node replica set is the standard cluster deployment for MongoDB in any production environment as it provides data redundancy and fault tolerance. In MongoDB, the construct of a primary server and set of secondary servers is called a replica set. This post is the basic guide on installing the MongoDB replica set and providing a UI access to it on a Kubernetes cluster. Also learn about its various application, features and future trends. Replication - MongoDB can provide high availability with replica sets. I will use Google… A replica set is a fully self-healing shard that helps prevent database downtime and can be used to scale read operations. The primary replica is the main server which interacts with the client and performs all the read/write operations. MongoDB maintains multiple copies of data called replica sets using native replication. Feature Compatibility Version. All replica set members must be running version 3.4. Now start the command prompt and connect to this mongod instance. All replica set members must be running version 4.0. MongoDB is an example of a sharded database architecture. Each replica set member may act in the role of the primary or secondary replica at any time. 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