fix: remove docker_registry_ca from being set

The task that uses this variable cannot handle the variable being
empty or omitted. This has been left unset within the base environment.

Signed-off-by: Jack Hodgkiss <jack@stackhpc.com>

Author: jackhodgkiss

doc/source/configuration/openbao.rst

@@ -496,6 +496,20 @@ To enable TLS for Pulp we first need to generate the certificates and the procee
 
       kayobe seed service reconfigure -t seed-deploy-containers -kt none
 
+5. Set CA for docker registry
+
+   .. code-block::
+      :caption: $KAYOBE_CONFIG_PATH/container-engine.yml
+
+      # CA of docker registry
+      docker_registry_ca: "{{ kayobe_env_config_path ~ '/openbao/OS-TLS-INT.crt' if pulp_enable_tls | bool else '' }}"
+
+6. Perform host configure to reconfigure APT, DNF and docker/podman settings
+
+   .. code-block::
+
+      kayobe overcloud host configure -t dnf,apt,container-engine
+
 Barbican integration
 ====================
 

etc/kayobe/container-engine.yml

@@ -40,7 +40,7 @@ docker_registry: "{{ stackhpc_docker_registry }}"
 docker_registry_insecure: "{{ 'https' not in stackhpc_repo_mirror_url }}"
 
 # CA of docker registry
-docker_registry_ca: "{{ kayobe_env_config_path ~ '/openbao/OS-TLS-INT.crt' if pulp_enable_tls | bool else none }}"
+#docker_registry_ca:
 
 # List of Docker registry mirrors.
 #docker_registry_mirrors: