Don't specify -c flag to pip if no upper constraints

ansible/overcloud-docker-sdk-upgrade.yml

@@ -26,6 +26,6 @@
       pip:
         name: docker
         state: latest
-        extra_args: "-c {{ kolla_upper_constraints_file }}"
+        extra_args: "{% if kolla_upper_constraints_file %}-c {{ kolla_upper_constraints_file }}{% endif %}"
         virtualenv: "{{ virtualenv is defined | ternary(virtualenv, omit) }}"
       become: "{{ virtualenv is not defined }}"

ansible/roles/docker/tasks/main.yml

@@ -18,7 +18,7 @@
   pip:
     name: docker
     state: latest
-    extra_args: "-c {{ docker_upper_constraints_file }}"
+    extra_args: "{% if docker_upper_constraints_file %}-c {{ docker_upper_constraints_file }}{% endif %}"
     virtualenv: "{{ virtualenv is defined | ternary(virtualenv, omit) }}"
   become: "{{ virtualenv is not defined }}"
 

ansible/roles/kolla-ansible/tasks/install.yml

@@ -58,7 +58,7 @@
   pip:
     requirements: "{{ kolla_ansible_venv }}/requirements.txt"
     state: present
-    extra_args: "-c {{ kolla_upper_constraints_file }}"
+    extra_args: "{% if kolla_upper_constraints_file %}-c {{ kolla_upper_constraints_file }}{% endif %}"
     virtualenv: "{{ kolla_ansible_venv }}"
 
 # This is a workaround for the lack of a python package for libselinux-python

ansible/roles/kolla/tasks/install.yml

@@ -65,7 +65,7 @@
     version: "{{ item.version | default(omit) }}"
     state: "{{ item.state | default('present') }}"
     virtualenv: "{{ kolla_venv }}"
-    extra_args: "-c {{ kolla_upper_constraints_file }}"
+    extra_args: "{% if kolla_upper_constraints_file %}-c {{ kolla_upper_constraints_file }}{% endif %}"
   with_items:
     # Intall Kolla from source.
     - name: "{{ kolla_source_path }}"