Migrate your data to Percona Server for MongoDB

If you use Percona Server for MongoDB, migrate your data to it from the MongoDB virtual machine in your Kubernetes cluster

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최근 업데이트: 2일 전

Migrate your data from the MongoDB virtual machine (VM) to Percona Server for MongoDB (PSMDB) in your Kubernetes cluster at your own pace with a staged approach. The Terraform variable

enable_percona_mongo

is for the deployment of the PSMDB operator and database in your Kubernetes cluster as a parallel setup. This variable is disabled by default. However, to ensure zero downtime, all services initially continue using your current MongoDB instance. The connection string logic follows this priority order:

The custom URI, if provided
The existing MongoDB VM
The new PSMDB cluster

To migrate your data to PSMDB, follow these steps:

Connect to your MongoDB instance through SSH, for example, using AWS Systems Manager Agent (SSM Agent).

To assign the

backup

role to the user who is to run the backup script, run this command:


# Connect to MongoDB and grant the backup rolemongo --username {admin_username} --password {admin_password} --authenticationDatabase admindb.grantRolesToUser("asset-manager", ['backup'])

Use these values:

```
admin_username
```
: the
```
asset-manager
```
user if you're using our MongoDB VM
```
admin_password
```
: the password that is stored in the
```
mongo_db_connection_string
```
secret in Secret Manager

Copy the backup script from the following location, and then run it:
```
./aws/scripts/mongodb-backup.sh
```
To provide the correct username and password, run this command:
```
./mongodb-backup.sh asset-manager {password}
```
Retrieve the .tar file, for example, using the Secure Copy Protocol (SCP).
To validate which pod is the primary pod, run these commands:
```
kubectl exec -it psmdb-db-rs0-x -c mongod -- bashmongo --username {admin_username} --password {admin_password} --authenticationDatabase adminrs.status()
```
The password is stored in the
```
psmdb_asset_manager_password
```
secret in Secret Manager.
중요
You must run the restore operation on the primary pod, otherwise the operation fails. Ensure you perform the next steps on the primary pod.
The primary pod is the pod that has these values:
- ```
"state" : 1
```
- ```
"stateStr" : "PRIMARY"
```

To retrieve .the tar file using SCP and copy it to the PSMDB primary pod, run this command:


kubectl cp ~/tmp/mongo_data_backup_YYYY-MM-DD_HH-MM-SS.tar.gz psmdb-db-rs0-x:/tmp/mongo_backup_YYYY-MM-DD_HH-MM-SS.tar.gz -c mongod

Copy the restore script from the following location to the primary pod:


./aws/scripts/mongodb-restore.sh

Run this command:


kubectl cp ~/scripts/mongodb-restore.sh psmdb-db-rs0-x:/tmp/mongodb-restore.sh -c mongod

To connect to the primary pod and import the backup, run these commands:


kubectl exec -it psmdb-db-rs0-x -c mongod -- bashcd /tmpchmod +x mongodb-restore.sh./mongodb-restore.sh asset-manager {password} mongo_backup_YYYY-MM-DD_HH-MM-SS.archive

To update the

mongo_connection_uri

terraform variable to use the new PSMDB cluster, run this command:


mongo_connection_uri = "mongodb+srv://asset-manager:{password}@psmdb-db-rs0.{kubernetes_namespace}.svc.cluster.local?authSource=admin&replicaSet=rs0&ssl=false"

Restart the Asset Manager services so that they use the new connection string.
When you're sure that the new PSMDB cluster is working, you can disable MongoDB VM instance by setting the Terraform variable
```
enable_mongo=false
```
.

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