Our locust fork needs system packages.

Add scipy and numpy dependencies for the opaque keys requirement as well.

playbooks/roles/locust/defaults/main.yml

@@ -47,6 +47,12 @@ LOCUST_REPOS:
 # OS packages
 #
 
-locust_debian_pkgs: []
+locust_debian_pkgs:
+  # Needed by our fork of locust :-( because it needs matplotlib.
+  - libfreetype6-dev
+  - libpng12-dev
+  # Needed for opaque-keys
+  - liblapack-dev
+  - gfortran
 
 locust_redhat_pkgs: []

playbooks/roles/locust/tasks/main.yml

@@ -30,6 +30,14 @@
 #     roles:
 #       - locust
 
+- name: install system packages
+  apt:
+    pkg: "{{ item }}"
+    state: "present"
+    update_cache: true
+    cache_valid_time: 3600
+  with_items: locust_debian_pkgs
+
 - name: install application requirements
   pip: >
     requirements="{{ locust_requirements_base }}/{{ item }}"