Minor upgrade of Percona Server for MongoDB¶

If you are using data-at-rest-encryption with KMIP server, check the upgrade considerations

To upgrade Percona Server for MongoDB to the latest version, follow these steps:

Stop the mongod service:
```
$ sudo systemctl stop mongod
```
Install the latest version packages. Use the command relevant to your operating system.
Start the mongod service:
```
$ sudo systemctl start mongod
```

To upgrade a replica set or a sharded cluster, use the rolling restart method. It allows you to perform the upgrade with minimum downtime. You upgrade the nodes one by one, while the whole cluster / replica set remains operational.