Respect Kolla upper constraints in virtual envs

ansible/group_vars/all/kolla

@@ -271,6 +271,9 @@ kolla_external_fqdn_cert:
 # Whether debug logging is enabled.
 kolla_openstack_logging_debug: "False"
 
+# Upper constraints file for the stable/pike branch of Kolla
+kolla_upper_constraints_file: "https://raw.githubusercontent.com/openstack/requirements/stable/pike/upper-constraints.txt"
+
 ###############################################################################
 # Kolla feature flag configuration.
 

ansible/overcloud-docker-sdk-upgrade.yml

@@ -26,5 +26,6 @@
       pip:
         name: docker
         state: latest
+        extra_args: "-c {{ kolla_upper_constraints_file }}"
         virtualenv: "{{ virtualenv is defined | ternary(virtualenv, omit) }}"
       become: "{{ virtualenv is not defined }}"

ansible/roles/docker/tasks/main.yml

@@ -18,6 +18,7 @@
   pip:
     name: docker
     state: latest
+    extra_args: "-c {{ kolla_upper_constraints_file }}"
     virtualenv: "{{ virtualenv is defined | ternary(virtualenv, omit) }}"
   become: "{{ virtualenv is not defined }}"
 

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

@@ -58,6 +58,7 @@
   pip:
     requirements: "{{ kolla_ansible_venv }}/requirements.txt"
     state: present
+    extra_args: "-c {{ kolla_upper_constraints_file }}"
     virtualenv: "{{ kolla_ansible_venv }}"
 
 # This is a workaround for the lack of a python package for libselinux-python

ansible/roles/kolla/tasks/install.yml

@@ -51,17 +51,22 @@
   with_items:
     - { name: pip }
 
+- name: Ensure Python package docker-py is absent
+  # In version 2.0.0, docker renamed the docker-py python package to docker.
+  # Kolla requires the docker package rather than the docker-py package.
+  pip:
+    name: docker-py
+    state: absent
+    virtualenv: "{{ kolla_venv }}"
+
 - name: Ensure required Python packages are installed
   pip:
     name: "{{ item.name }}"
     version: "{{ item.version | default(omit) }}"
     state: "{{ item.state | default('present') }}"
     virtualenv: "{{ kolla_venv }}"
+    extra_args: "-c {{ kolla_upper_constraints_file }}"
   with_items:
-    # In version 2.0.0, docker renamed the docker-py python package to docker.
-    # Kolla requires the docker package rather than the docker-py package.
-    - name: docker-py
-      state: absent
     - name: docker
     # Intall Kolla from source.
     - name: "{{ kolla_source_path }}"