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Update documentation for Getting Started with data migration #9030

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Update documentation for Getting Started with data migration
jugal-chauhan Jan 7, 2025
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89 changes: 46 additions & 43 deletions ...ation-assistant/deploying-migration-assistant/getting-started-data-migration.md
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Expand Up @@ -20,6 +20,7 @@
* Verify that your migration path [is supported]({{site.url}}{{site.baseurl}}/migration-assistant/is-migration-assistant-right-for-you/#migration-paths). Note that we test with the exact versions specified, but you should be able to migrate data on alternative minor versions as long as the major version is supported.
* The source cluster must be deployed Amazon Simple Storage Service (Amazon S3) plugin.
* The target cluster must be deployed.
* Verify that the CDKToolkit Stack exists and is set to `CREATE_COMPLETE`. Refer to [this documentation](https://docs.aws.amazon.com/cdk/v2/guide/getting_started.html) on how to bootstrap your AWS account in the required AWS Region

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The steps in this guide assume the following:

Expand Down Expand Up @@ -70,6 +71,7 @@
{% include copy.html %}

3. Name the policy, for example, `SSM-OSMigrationBootstrapAccess`, and then create the policy by selecting **Create policy**.
4. Attach this newly created policy to your EC2 instance's IAM Role.

---

Expand Down Expand Up @@ -107,14 +109,15 @@

## Step 4: Configure and deploy RFS (~20 minutes)

Use the following steps to configure and deploy RFS:
Use the following steps to configure and deploy RFS, deploy Migration Assistant and verify installation of required stacks:

1. Add the target cluster password to AWS Secrets Manager as an unstructured string. Be sure to copy the secret Amazon Resource Name (ARN) for use during deployment.
1. Add the source and target cluster password as separate Secrets to AWS Secrets Manager as an unstructured string. Be sure to copy the secret Amazon Resource Name (ARN) for use during deployment.
2. From the same shell as the Bootstrap instance, modify the `cdk.context.json` file located in the `/opensearch-migrations/deployment/cdk/opensearch-service-migration` directory:

```json
{
"migration-assistant": {
"stage": "dev",
"vpcId": "<TARGET CLUSTER VPC ID>",
"targetCluster": {
"endpoint": "<TARGET CLUSTER ENDPOINT>",
Expand All @@ -126,14 +129,14 @@
},
"sourceCluster": {
"endpoint": "<SOURCE CLUSTER ENDPOINT>",
"version": "<SOURCE ENGINE VERSION>",
"auth": {
"type": "basic",
"username": "<TARGET CLUSTER USERNAME>",
"passwordFromSecretArn": "<TARGET CLUSTER PASSWORD SECRET>"
}
},
"reindexFromSnapshotExtraArgs": "<RFS PARAMETERS (see below)>",
"stage": "dev",
"otelCollectorEnabled": true,
"migrationConsoleServiceEnabled": true,
"reindexFromSnapshotServiceEnabled": true,
Expand All @@ -152,54 +155,52 @@
```
{% include copy.html %}

4. Deploy the stacks:
4. Deploy Migration Assistant and required stacks when `cdk.context.json` is fully configured:

```bash
cdk deploy "*" --c contextId=migration-assistant --require-approval never --concurrency 5
```
{% include copy.html %}

5. Verify that all CloudFormation stacks were installed successfully.

### RFS parameters

If you're creating a snapshot using migration tooling, these parameters are automatically configured. If you're using an existing snapshot, modify the `reindexFromSnapshotExtraArgs` setting with the following values:
These commands deploy the following stacks:
* Migration Assistant network stack
* `Reindex-from-snapshot` stack
* Migration console stack
5. Verify from the same Bootstrap instance shell that all CloudFormation stacks were installed successfully:

```bash
--s3-repo-uri s3://<bucket-name>/<repo> --s3-region <region> --snapshot-name <name>
aws cloudformation list-stacks --query "StackSummaries[?StackStatus!='DELETE_COMPLETE'].[StackName,StackStatus]" --output table
```
{% include copy.html %}

You should receive a similar output for your region:

You will also need to give the `migrationconsole` and `reindexFromSnapshot` TaskRoles permissions to the S3 bucket.

---

## Step 5: Deploy Migration Assistant

To deploy Migration Assistant, use the following steps:
```bash
------------------------------------------------------------------------
| ListStacks |
+--------------------------------------------------+-------------------+
| OSMigrations-dev-us-east-1-MigrationConsole | CREATE_COMPLETE |
| OSMigrations-dev-us-east-1-ReindexFromSnapshot | CREATE_COMPLETE |
| OSMigrations-dev-us-east-1-MigrationInfra | CREATE_COMPLETE |
| OSMigrations-dev-us-east-1-default-NetworkInfra | CREATE_COMPLETE |
| MigrationBootstrap | CREATE_COMPLETE |
| CDKToolkit | CREATE_COMPLETE |
+--------------------------------------------------+-------------------+
```

1. Bootstrap the account:

```bash
cdk bootstrap --c contextId=migration-assistant --require-approval never --concurrency 5
```
{% include copy.html %}
### RFS parameters

2. Deploy the stacks when `cdk.context.json` is fully configured:

```bash
cdk deploy "*" --c contextId=migration-assistant --require-approval never --concurrency 3
```
{% include copy.html %}
If you're creating a snapshot using migration tooling, these parameters are automatically configured. If you're using an existing snapshot, modify the `reindexFromSnapshotExtraArgs` setting with the following values:

These commands deploy the following stacks:
```bash
"reindexFromSnapshotExtraArgs": "--s3-repo-uri s3://<bucket-name>/<repo> --s3-region <region> --snapshot-name <name>"
```

* Migration Assistant network stack
* `Reindex-from-snapshot` stack
* Migration console stack
You will also need to give the `migrationconsole` and `reindexFromSnapshot` TaskRoles permissions to the S3 bucket.

---

## Step 6: Access the migration console
## Step 5: Access the migration console

Run the following command to access the migration console:

Expand All @@ -214,7 +215,7 @@

---

## Step 7: Verify the connection to the source and target clusters
## Step 6: Verify the connection to the source and target clusters

To verify the connection to the clusters, run the following command:

Expand All @@ -226,15 +227,17 @@
You should receive the following output:

```bash
* **Source Cluster:** Successfully connected!
* **Target Cluster:** Successfully connected!
SOURCE CLUSTER
ConnectionResult(connection_message='Successfully connected!', connection_established=True, cluster_version='')
TARGET CLUSTER
ConnectionResult(connection_message='Successfully connected!', connection_established=True, cluster_version='')
```

To learn more about migration console commands, see [Migration commands].

---

## Step 8: Create a snapshot
## Step 7: Create a snapshot

Run the following command to initiate snapshot creation from the source cluster:

Expand Down Expand Up @@ -263,7 +266,7 @@

---

## Step 9: Migrate metadata
## Step 8: Migrate metadata

Run the following command to migrate metadata:

Expand All @@ -276,7 +279,7 @@

---

## Step 10: Migrate documents with RFS
## Step 9: Migrate documents with RFS

You can now use RFS to migrate documents from your original cluster:

Expand Down Expand Up @@ -312,7 +315,7 @@

---

## Step 11: Backfill monitoring
## Step 10: Backfill monitoring

Use the following command for detailed monitoring of the backfill process:

Expand All @@ -339,7 +342,7 @@

---

## Step 12: Verify that all documents were migrated
## Step 11: Verify that all documents were migrated

Use the following query in CloudWatch Logs Insights to identify failed documents:

Expand Down
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