PolarDB:PolarDB:Configure a security group

Scenario

After you create a PolarDB for MySQL cluster, you cannot connect ECS instances to the cluster. You must add a security group to the whitelist of the PolarDB for MySQL cluster to allow the ECS instances in the security group to access the PolarDB for MySQL cluster.

• For more information about security groups and how to configure a security group in the ECS console, see Create a security group.

• You can also add the IP addresses of ECS instances to an IP whitelist. Both methods work independently: ECS instances in the IP whitelist and ECS instances in the security group that is added to the cluster whitelist can access the PolarDB for MySQL cluster.

Precautions

• The network types of a PolarDB for MySQL cluster and the security groups that are added to its whitelist must be the same. For example, if your PolarDB for MySQL cluster is deployed in a virtual private cloud (VPC), you can add only security groups of the VPC type.

• You can add up to 10 security groups to a PolarDB for MySQL cluster.

• When a security group is added to a PolarDB for MySQL cluster, the IP addresses of the ECS instances in the security group are automatically added to the whitelist of the cluster. The security group rules do not affect this operation.

Procedure

1. Log on to the PolarDB console.

2. In the left-side navigation pane, click Clusters.

3. In the upper-left corner, select the region where the cluster to which you want to connect is deployed.

4. Find the cluster and click its ID.

5. In the left-side navigation pane, choose Settings and Management > Cluster Whitelists.

6. On the Cluster Whitelists page, you can click Select Security Groups to add a security group. You can also click Configure in the Actions column to change the security groups.

1. In the Select Security Groups panel, select one or more security groups and click OK.

For more information about how to create a security group, see Create a security group.

Verify the result

After you add a security group, confirm the configuration on the Cluster Whitelists page, then test the connection to the cluster endpoint from an ECS instance in the security group.

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