MySQL Connectivity Troubleshooting

You may find MySQL can't connect after installing Istio. This is because MySQL is a server first protocol, which can interfere with Istio's protocol detection. In particular, using PERMISSIVE mTLS mode, may cause issues. You may see error messages such as ERROR 2013 (HY000): Lost connection to MySQL server at 'reading initial communication packet', system error: 0.

This can be fixed by ensuring STRICT or DISABLE mode is used, or that all clients are configured to send mTLS. See server first protocols for more information.