enable mitogen on CI tests via env vars

mitogen.yml

@@ -24,7 +24,7 @@
         dest: "{{ playbook_dir }}/dist/mitogen_{{ mitogen_version }}.tar.gz"
         validate_certs: true
 
-    - name: extract zip
+    - name: extract archive
       unarchive:
         src: "{{ playbook_dir }}/dist/mitogen_{{ mitogen_version }}.tar.gz"
         dest: "{{ playbook_dir }}/dist/"

tests/scripts/testcases_run.sh

@@ -44,7 +44,11 @@ test "${UPGRADE_TEST}" != "false" && git fetch --all && git checkout "$KUBESPRAY
 test "${UPGRADE_TEST}" != "false" && git checkout "${CI_BUILD_REF}" tests/files/${CI_JOB_NAME}.yml tests/testcases/*.yml
 
 # Install mitogen ansible plugin
-test "${MITOGEN_ENABLE}" = "true" && ansible-playbook ${ANSIBLE_LOG_LEVEL} mitogen.yml
+if [ "${MITOGEN_ENABLE}" = "true" ]; then
+  ansible-playbook ${ANSIBLE_LOG_LEVEL} mitogen.yml
+  export ANSIBLE_STRATEGY=mitogen_linear
+  export ANSIBLE_STRATEGY_PLUGINS=plugins/mitogen/ansible_mitogen/plugins/strategy
+fi
 
 # Create cluster
 ansible-playbook ${ANSIBLE_LOG_LEVEL} -e @${CI_TEST_VARS} -e local_release_dir=${PWD}/downloads --limit "all:!fake_hosts" cluster.yml