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# CreateReplicator 自管理 Kafka 集群的 API 示例
<a name="msk-replicator-external-api-examples"></a>

## 正向复制（自管 Kafka 到 MSK Express）
<a name="msk-replicator-external-forward"></a>

使用以下 Amazon CLI 命令创建复制器，用于将数据从您的自行管理的 Kafka 集群复制到 Amazon MSK Express 集群。

```
aws kafka create-replicator \
  --replicator-name my-selfmanaged-to-msk-replicator \
  --description "Replicating from self-managed Kafka to MSK Express" \
  --service-execution-role-arn arn:aws:iam::123456789012:role/MSKReplicatorRole \
  --kafka-clusters '[
    {
      "apacheKafkaCluster": {
        "bootstrapBrokerString": "broker1:9094,broker2:9094,broker3:9094",
        "apacheKafkaClusterId": "<self-managed-cluster-id>"
      },
      "clientAuthentication": {
        "saslScram": {
          "mechanism": "SHA256",
          "secretArn": "arn:aws:secretsmanager:us-east-1:123456789012:secret:kafka-scram-creds"
        }
      },
      "encryptionInTransit": {
        "encryptionType": "TLS",
        "rootCaCertificate": "arn:aws:secretsmanager:us-east-1:123456789012:secret:kafka-scram-creds"
      },
      "vpcConfig": {
        "subnetIds": ["subnet-aaa","subnet-bbb","subnet-ccc"],
        "securityGroupIds": ["sg-xxxxxxxxxxxxxxxxx"]
      }
    },
    {
      "amazonMskCluster": {
        "mskClusterArn": "arn:aws:kafka:us-east-1:123456789012:cluster/msk-express/xxx"
      },
      "vpcConfig": {
        "subnetIds": ["subnet-ddd","subnet-eee","subnet-fff"],
        "securityGroupIds": ["sg-yyyyyyyyy"]
      }
    }]' \
  --replication-info-list '[{
    "sourceKafkaClusterId": "<self-managed-cluster-id>",
    "targetKafkaClusterArn": "arn:aws:kafka:us-east-1:123456789012:cluster/msk-express/xxx",
    "targetCompressionType": "NONE",
    "topicReplication": {
      "topicsToReplicate": [".*"],
      "topicNameConfiguration": {"type": "IDENTICAL"},
      "startingPosition": {"type": "EARLIEST"},
      "detectAndCopyNewTopics": true,
      "copyTopicConfigurations": true,
      "copyAccessControlListsForTopics": true
    },
    "consumerGroupReplication": {
      "consumerGroupsToReplicate": [".*"],
      "detectAndCopyNewConsumerGroups": true,
      "synchroniseConsumerGroupOffsets": true
    }}]'
```

## 双向复制示例
<a name="msk-replicator-external-bidirectional"></a>

要设置双向复制以实现回滚功能，必须同时创建正向和反向复制器，并设置为`consumerGroupOffsetSyncMode`。`ENHANCED`这样可以确保消费者组偏移量以支持任一方向的无缝切换的方式同步。

使用偏移同步模式创建正向复制器（自行管理 Kafka 到 MSK Express`ENHANCED`）：

```
aws kafka create-replicator \
  --replicator-name my-selfmanaged-to-msk-replicator \
  --description "Replicating from self-managed Kafka to MSK Express" \
  --service-execution-role-arn arn:aws:iam::123456789012:role/MSKReplicatorRole \
  --kafka-clusters '[
    {
      "apacheKafkaCluster": {
        "bootstrapBrokerString": "broker1:9094,broker2:9094,broker3:9094",
        "apacheKafkaClusterId": "<self-managed-cluster-id>"
      },
      "clientAuthentication": {
        "saslScram": {
          "mechanism": "SHA256",
          "secretArn": "arn:aws:secretsmanager:us-east-1:123456789012:secret:kafka-scram-creds"
        }
      },
      "encryptionInTransit": {
        "encryptionType": "TLS",
        "rootCaCertificate": "arn:aws:secretsmanager:us-east-1:123456789012:secret:kafka-ca-cert"
      },
      "vpcConfig": {
        "subnetIds": ["subnet-aaa","subnet-bbb","subnet-ccc"],
        "securityGroupIds": ["sg-xxxxxxxxxxxxxxxxx"]
      }
    },
    {
      "amazonMskCluster": {
        "mskClusterArn": "arn:aws:kafka:us-east-1:123456789012:cluster/msk-express/xxx"
      },
      "vpcConfig": {
        "subnetIds": ["subnet-ddd","subnet-eee","subnet-fff"],
        "securityGroupIds": ["sg-yyyyyyyyy"]
      }
    }]' \
  --replication-info-list '[{
    "sourceKafkaClusterId": "<self-managed-cluster-id>",
    "targetKafkaClusterArn": "arn:aws:kafka:us-east-1:123456789012:cluster/msk-express/xxx",
    "targetCompressionType": "NONE",
    "topicReplication": {
      "topicsToReplicate": [".*"],
      "topicNameConfiguration": {"type": "IDENTICAL"},
      "startingPosition": {"type": "EARLIEST"},
      "detectAndCopyNewTopics": true,
      "copyTopicConfigurations": true,
      "copyAccessControlListsForTopics": true
    },
    "consumerGroupReplication": {
      "consumerGroupsToReplicate": [".*"],
      "detectAndCopyNewConsumerGroups": true,
      "synchroniseConsumerGroupOffsets": true,
      "consumerGroupOffsetSyncMode": "ENHANCED"
    }}]'
```

然后使用偏移同步模式创建反向复制器（MSK Express 到自我管理的 Kafka）：`ENHANCED`

```
aws kafka create-replicator \
  --replicator-name my-msk-to-selfmanaged-replicator \
  --description "Reverse replication for rollback" \
  --service-execution-role-arn arn:aws:iam::123456789012:role/MSKReplicatorRole \
  --kafka-clusters '[
    {
      "amazonMskCluster": {
        "mskClusterArn": "arn:aws:kafka:us-east-1:123456789012:cluster/msk-express/xxx"
      },
      "vpcConfig": {
        "subnetIds": ["subnet-ddd","subnet-eee","subnet-fff"],
        "securityGroupIds": ["sg-yyyyyyyyy"]
      }
    },
    {
      "apacheKafkaCluster": {
        "bootstrapBrokerString": "broker1:9094,broker2:9094,broker3:9094",
        "apacheKafkaClusterId": "<self-managed-cluster-id>"
      },
      "clientAuthentication": {
        "saslScram": {
          "mechanism": "SHA256",
          "secretArn": "arn:aws:secretsmanager:us-east-1:123456789012:secret:kafka-scram-creds"
        }
      },
      "encryptionInTransit": {
        "encryptionType": "TLS",
        "rootCaCertificate": "arn:aws:secretsmanager:us-east-1:123456789012:secret:kafka-ca-cert"
      },
      "vpcConfig": {
        "subnetIds": ["subnet-aaa","subnet-bbb","subnet-ccc"],
        "securityGroupIds": ["sg-xxxxxxxxxxxxxxxxx"]
      }
    }]' \
  --replication-info-list '[{
    "sourceKafkaClusterArn": "arn:aws:kafka:us-east-1:123456789012:cluster/msk-express/xxx",
    "targetKafkaClusterId": "<self-managed-cluster-id>",
    "targetCompressionType": "NONE",
    "topicReplication": {
      "topicsToReplicate": [".*"],
      "topicNameConfiguration": {"type": "IDENTICAL"},
      "startingPosition": {"type": "LATEST"},
      "detectAndCopyNewTopics": true,
      "copyTopicConfigurations": true,
      "copyAccessControlListsForTopics": true
    },
    "consumerGroupReplication": {
      "consumerGroupsToReplicate": [".*"],
      "detectAndCopyNewConsumerGroups": true,
      "synchroniseConsumerGroupOffsets": true,
      "consumerGroupOffsetSyncMode": "ENHANCED"
    }}]'
```

## 验证复制器状态
<a name="msk-replicator-external-verify"></a>

使用 `describe-replicator` CLI 命令检查复制器的状态：

```
aws kafka describe-replicator \
  --replicator-arn arn:aws:kafka:us-east-1:123456789012:replicator/my-replicator/xxx
```

复制器将通过 `CREATING` → `RUNNING` 状态前进。等待大约 30 分钟，让复制器进入`RUNNING`状态。