feat: Automatically set MDX client_protocol_type=TLS for MySQL connections.#2207
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feat: Automatically set MDX client_protocol_type=TLS for MySQL connections.#2207
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hessjcg
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This is the client-side implementation of the metadata exchange protocol for Cloud SQL instances. This will allow connectors to pass metadata about the connection to the Cloud SQL instance while the connection is being established. In particular, this is a part of resolving the issues with the Auth Proxy connecting to MySQL instances that use the caching_sha2_password extension. (See GoogleCloudPlatform/cloud-sql-proxy#2317) This does not update the default MDX behavior yet. That will be added in #2207
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…tions. When a Cloud SQL instance supports Metadata Exchange, the MySQL socket factory will automatically set MDX client_protocol_type=TLS. This will ensure that the password auth protocol works correctly. See also #2200 and GoogleCloudPlatform/cloud-sql-proxy#2317
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kgala2
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Oct 29, 2025
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When a Cloud SQL instance supports Metadata Exchange, the MySQL socket factory will
automatically set MDX client_protocol_type=TLS. This will ensure that the password
auth protocol works correctly.
See also #2200 and GoogleCloudPlatform/cloud-sql-proxy#2317