Upgrade MySQL from 8.0 to 8.4 LTS (step 2)#69
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Second step of the safe migration path: 5.7 → 8.0 → 8.4 LTS. MySQL 8.4 is the current LTS release (supported until April 2032). - Enable --mysql-native-password=ON since 8.4 disables it by default; existing clients (dovecot, postfix, postfixadmin, WordPress) still use the old auth plugin. Users should be migrated to caching_sha2_password in a follow-up. - Disable healthchecks during migration to prevent premature container kills while the upgrade runs. Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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Summary
mysql_mailandmysql_wordpress_noerpelfrom MySQL 8.0 to 8.4 LTS (supported until April 2032)--mysql-native-password=ONto preserve auth compatibility with existing clientsPre-deployment checklist
mysql_mail_datavolumemysql_wordpress_noerpel_datavolumePost-deployment verification
docker compose logs mysql_mail)Follow-up
mysql_native_passwordtocaching_sha2_password--mysql-native-password=ONflag🤖 Generated with Claude Code