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I can see different hotspots where some improvement may be due.
- Using "localhost" as the Redis host: In the Python client code, the Redis cluster client is configured with "localhost" as the host. However, when using port forwarding with AWS SSM, the Redis endpoint should typically be accessed through the SSM session, not locally on "localhost". Ensure that you're using the correct endpoint provided by AWS SSM port forwarding.
- Handling of Redis Cluster Configuration: The Python client code initializes the RedisCluster client with a single startup node. However, Redis cluster clients typically require the entire list of cluster nodes to connect properly. Ensure that the startup_nodes parameter includes all the nodes in the Redis cluster.
- Error Handling in Connection: The connect_to_redis_cluster() function catches all exceptions and logs them. While this is useful for debugging, it might be beneficial to handle specific types of exceptions differently. For example, connection timeout errors might require different handling compared to other types of errors.
- Missing Configuration in AWS SSM Command: The AWS SSM command for starting a port forwarding session does not specify the correct value for the "host" parameter. It should be replaced with the actual cache configuration endpoint provided by AWS.
- Inadequate Logging: The logging in the Python client code is minimal and may not provide enough information to diagnose connection issues effectively. Consider adding more detailed logging statements, especially around connection attempts and failures.
- Security Considerations: Ensure that appropriate security measures are in place, such as using secure connections (e.g., TLS/SSL) and implementing access controls, especially when accessing resources over the internet.
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Make sure your Redis Cache cluster security group allows access from your EC2 you are using as the SSM tunnel endpoint.
Your <cache configuration endpoint> needs to be resolvable to the VPC Endpoint from your EC2..
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- AWS公式更新しました 2年前
With SSM port forwarding you do need to reference localhost as this is how port forwarding works. The local port is tunneled through the session and is bound on the loopback of the PC. https://aws.amazon.com/blogs/mt/use-port-forwarding-in-aws-systems-manager-session-manager-to-connect-to-remote-hosts/
Also try using 127.0.0.1 instead of localhost incase localhost is your IPV6 address