CLOUD_SQL_CONNECTION_TIMEOUT cloud network_error ai_generated true

Error: SQL Server connection timeout after 30 seconds using Cloud SQL Proxy with SSL

ID: cloud/gcp-cloud-sql-connection-timeout-ssl

Also available as: JSON · Markdown · 中文
80%Fix Rate
85%Confidence
1Evidence
2023-08-15First Seen

Version Compatibility

VersionStatusIntroducedDeprecatedNotes
Cloud SQL Proxy 2.8.0 active — — —
Cloud SQL for SQL Server 2022 active — — —
gcloud CLI 450.0.0 active — — —

Root Cause

Cloud SQL Proxy with SSL enabled can cause connection timeouts when the proxy's SSL handshake is misconfigured or the instance's SSL certificate is not properly trusted, leading to a 30-second default connection timeout.

generic

中文

当 Cloud SQL Proxy 启用了 SSL 但 SSL 握手配置错误或实例的 SSL 证书未正确信任时，会导致连接超时，默认超时时间为 30 秒。

Official Documentation

https://cloud.google.com/sql/docs/sqlserver/connect-connector

Workarounds

  1. 85% success Update the Cloud SQL Proxy to the latest version (e.g., 2.9.0+) and ensure the SSL certificate chain is correctly configured: download the server CA certificate from the GCP Console and pass it via --ssl-ca-path. 
    Update the Cloud SQL Proxy to the latest version (e.g., 2.9.0+) and ensure the SSL certificate chain is correctly configured: download the server CA certificate from the GCP Console and pass it via --ssl-ca-path.
  2. 75% success Use the Cloud SQL Auth Proxy with the --auto-iam-authn flag to bypass SSL certificate issues when IAM authentication is enabled. 
    Use the Cloud SQL Auth Proxy with the --auto-iam-authn flag to bypass SSL certificate issues when IAM authentication is enabled.
  3. 80% success Example command: cloud-sql-proxy --ssl-ca-path=/path/to/server-ca.pem INSTANCE_CONNECTION_NAME 
    Example command: cloud-sql-proxy --ssl-ca-path=/path/to/server-ca.pem INSTANCE_CONNECTION_NAME

中文步骤

  1. 将 Cloud SQL Proxy 更新到最新版本（例如 2.9.0+），并确保 SSL 证书链配置正确：从 GCP 控制台下载服务器 CA 证书，并通过 --ssl-ca-path 参数传递。
  2. 使用 Cloud SQL Auth Proxy 的 --auto-iam-authn 标志，在启用了 IAM 认证时绕过 SSL 证书问题。
  3. 示例命令：cloud-sql-proxy --ssl-ca-path=/path/to/server-ca.pem INSTANCE_CONNECTION_NAME

Dead Ends

Common approaches that don't work:

  1. 70% fail

    The timeout is a symptom, not the root cause; the SSL handshake still fails.

  2. 50% fail

    SSL is often required by compliance; disabling it is not a viable fix.