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This pull request enables internal and backend database TLS by upgrading ProxySQL to version 3.0.x and adding the necessary certificate generation tasks. A review comment identifies a hardcoded path in the root CA copy task that should be parameterized with the stackhpc_ca_secret_store variable to support different secret store backends.
etc/kayobe/ansible/secret-store/secret-store-generate-internal-tls.yml
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Upstream Kolla-Ansible backported ProxySQL 3.0.x to 2025.1 release.
https://review.opendev.org/c/openstack/kolla-ansible/+/974712
https://review.opendev.org/c/openstack/kolla/+/974429
ProxySQL 3.0.x has a fix for the bug sysown/proxysql#4877 which prevented using TLS between database and ProxySQL.
Re-enable Database TLS and add tasks for creating certificates for ProxySQL.
Note: Two variables
database_enable_tls_internalanddatabase_enable_tls_backendhave default valuetruebut these are still explicitly set totrueto ensure existing systems can also get effect.