Encrypt ProxySQL cert and key if exist

ProxySQL cert is set to use internal TLS cert[1] which needs an
encryption.

[1] https://opendev.org/openstack/kolla-ansible/src/branch/stable/2025.1/ansible/roles/certificates/tasks/generate.yml#L169-L183

Author: seunghun1ee

ansible/files/multinode.sh

@@ -173,6 +173,11 @@ function generate_overcloud_certs() {
   run_kayobe playbook run $KAYOBE_CONFIG_PATH/ansible/openbao-generate-internal-tls.yml
   encrypt_file $KAYOBE_CONFIG_PATH/environments/$KAYOBE_ENVIRONMENT/kolla/certificates/haproxy-internal.pem
 
+  # If ProxySQL certificate and key are generated, encrypt them
+  for proxysql_item in $(ls -1 $KAYOBE_CONFIG_PATH/environments/$KAYOBE_ENVIRONMENT/kolla/certificates/proxysql-*); do
+    encrypt_file $proxysql_item
+  done
+
   # Generate backend tls certificates
   run_kayobe playbook run $KAYOBE_CONFIG_PATH/ansible/openbao-generate-backend-tls.yml
   for cert in $(ls -1 $KAYOBE_CONFIG_PATH/environments/$KAYOBE_ENVIRONMENT/kolla/certificates/*-key.pem); do