Switch tests to use Molecule.

.gitignore

 *.retry
-tests/test.sh
+*/__pycache__
+*.pyc

.travis.yml

 ---
+language: python
 services: docker
 
 env:
-  - distro: centos7
-  - distro: ubuntu1604
-  - distro: debian9
+  global:
+    - ROLE_NAME: kubernetes
+  matrix:
+    - MOLECULE_DISTRO: centos7
+      MOLECULE_DOCKER_COMMAND: /usr/lib/systemd/systemd
+    - MOLECULE_DISTRO: ubuntu1604
+    - MOLECULE_DISTRO: debian9
 
-script:
-  # Configure test script so we can run extra tests after playbook is run.
-  - export container_id=$(date +%s)
-  - export cleanup=false
+install:
+  # Install test dependencies.
+  - pip install molecule docker
 
-  # Download test shim.
-  - wget -O ${PWD}/tests/test.sh https://gist.githubusercontent.com/geerlingguy/73ef1e5ee45d8694570f334be385e181/raw/
-  - chmod +x ${PWD}/tests/test.sh
+before_script:
+  # Use actual Ansible Galaxy role name for the project directory.
+  - cd ../
+  - mv ansible-role-$ROLE_NAME geerlingguy.$ROLE_NAME
+  - cd geerlingguy.$ROLE_NAME
 
+script:
   # Run tests.
-  - ${PWD}/tests/test.sh
-
-  # Test whether Kubernetes is running correctly.
-  # - docker exec --tty ${container_id} command-goes-here
+  - molecule test
 
 notifications:
   webhooks: https://galaxy.ansible.com/api/v1/notifications/

README.md

@@ -31,15 +31,15 @@ Whether the particular server will serve as a Kubernetes `master` (default) or `
 
 Extra args to pass to `kubelet` during startup. E.g. to allow `kubelet` to start up even if there is swap is enabled on your server, set this to: `"--fail-swap-on=false"`. Or to specify the node-ip advertised by `kubelet`, set this to `"--node-ip={{ ansible_host }}"`.
 
-    kubernetes_allow_pods_on_master: True
+    kubernetes_allow_pods_on_master: true
 
 Whether to remove the taint that denies pods from being deployed to the Kubernetes master. If you have a single-node cluster, this should definitely be `True`. Otherwise, set to `False` if you want a dedicated Kubernetes master which doesn't run any other pods.
 
-    kubernetes_enable_web_ui: False
+    kubernetes_enable_web_ui: false
 
 Whether to enable the Kubernetes web dashboard UI (only accessible on the master itself, or proxied).
 
-    kuberenetes_debug: False
+    kuberenetes_debug: false
 
 Whether to show extra debug info in Ansible's logs (e.g. the output of the `kubeadm init` command).
 
@@ -52,7 +52,7 @@ Options passed to `kubeadm init` when initializing the Kubernetes master. The `a
 
     kubernetes_apt_release_channel: main
     kubernetes_apt_repository: "deb http://apt.kubernetes.io/ kubernetes-xenial {{ kubernetes_apt_release_channel }}"
-    kubernetes_apt_ignore_key_error: False
+    kubernetes_apt_ignore_key_error: false
 
 Apt repository options for Kubernetes installation.
 

defaults/main.yml

@@ -13,9 +13,9 @@ kubernetes_role: master
 
 kubernetes_kubelet_extra_args: ""
 
-kubernetes_allow_pods_on_master: True
-kubernetes_enable_web_ui: True
-kuberenetes_debug: False
+kubernetes_allow_pods_on_master: true
+kubernetes_enable_web_ui: true
+kuberenetes_debug: false
 
 kubernetes_pod_network_cidr: '10.0.1.0/16'
 kubernetes_apiserver_advertise_address: ''
@@ -25,7 +25,7 @@ kubernetes_ignore_preflight_errors: 'all'
 kubernetes_apt_release_channel: main
 # Note that xenial repo is used for all Debian derivatives at this time.
 kubernetes_apt_repository: "deb http://apt.kubernetes.io/ kubernetes-xenial {{ kubernetes_apt_release_channel }}"
-kubernetes_apt_ignore_key_error: False
+kubernetes_apt_ignore_key_error: false
 
 kubernetes_yum_arch: x86_64
 

meta/main.yml

@@ -8,16 +8,16 @@ galaxy_info:
   license: "license (BSD, MIT)"
   min_ansible_version: 2.4
   platforms:
-  - name: EL
-    versions:
-    - 7
-  - name: Debian
-    versions:
-    - stretch
-  - name: Ubuntu
-    versions:
-    - xenial
-    - bionic
+    - name: EL
+      versions:
+        - 7
+    - name: Debian
+      versions:
+        - stretch
+    - name: Ubuntu
+      versions:
+        - xenial
+        - bionic
   galaxy_tags:
     - system
     - containers

molecule/default/molecule.yml

+---
+dependency:
+  name: galaxy
+driver:
+  name: docker
+lint:
+  name: yamllint
+  options:
+    config-file: molecule/default/yaml-lint.yml
+platforms:
+  - name: instance
+    image: geerlingguy/docker-${MOLECULE_DISTRO:-centos7}-ansible
+    command: ${MOLECULE_DOCKER_COMMAND:-"sleep infinity"}
+    privileged: true
+    pre_build_image: true
+provisioner:
+  name: ansible
+  lint:
+    name: ansible-lint
+  playbooks:
+    converge: ${MOLECULE_PLAYBOOK:-playbook.yml}
+scenario:
+  name: default
+verifier:
+  name: testinfra
+  lint:
+    name: flake8

tests/test.yml → molecule/default/playbook.yml

 ---
-- hosts: all
+- name: Converge
+  hosts: all
+  become: true
 
   vars:
     # Allow swap in test environments (hard to control in some Docker envs).
     kubernetes_kubelet_extra_args: "--fail-swap-on=false"
-    docker_install_compose: False
+    docker_install_compose: false
 
   pre_tasks:
     - name: Update apt cache.
-      apt: update_cache=yes cache_valid_time=600
+      apt: update_cache=true cache_valid_time=600
       when: ansible_os_family == 'Debian'
 
     - name: Ensure test dependencies are installed.
       package: name=iproute state=present
 
-    - action: setup
+    - name: Gather facts.
+      action: setup
 
     - name: Use cgroupfs cgroup driver instead of systemd (Red Hat).
       set_fact:
@@ -22,5 +25,5 @@
       when: ansible_os_family == 'RedHat'
 
   roles:
-    - geerlingguy.docker
-    - role_under_test
+    - role: geerlingguy.docker
+    - role: geerlingguy.kubernetes

molecule/default/tests/test_default.py

+import os
+
+import testinfra.utils.ansible_runner
+
+testinfra_hosts = testinfra.utils.ansible_runner.AnsibleRunner(
+    os.environ['MOLECULE_INVENTORY_FILE']).get_hosts('all')
+
+
+def test_hosts_file(host):
+    f = host.file('/etc/hosts')
+
+    assert f.exists
+    assert f.user == 'root'
+    assert f.group == 'root'

molecule/default/yaml-lint.yml

+---
+extends: default
+rules:
+  line-length:
+    max: 150
+    level: warning

tasks/kubelet-setup.yml

@@ -16,7 +16,7 @@
     kubelet_args_path: '/etc/systemd/system/kubelet.service.d/10-kubeadm.conf'
     kubelet_args_line: "{{ 'Environment=\"KUBELET_EXTRA_ARGS=' + kubernetes_kubelet_extra_args + '\"' }}"
     kubelet_args_regexp: '^Environment='
-  when: kubelet_environment_file.stat.exists == False
+  when: kubelet_environment_file.stat.exists == false
 
 - name: Configure KUBELET_EXTRA_ARGS.
   lineinfile:
@@ -29,6 +29,6 @@
 - name: Reload systemd unit if args were changed.
   systemd:
     state: restarted
-    daemon_reload: yes
+    daemon_reload: true
     name: kubelet
   when: kubelet_config_file is changed

tasks/main.yml

@@ -24,7 +24,7 @@
   service:
     name: kubelet
     state: started
-    enabled: yes
+    enabled: true
 
 - name: Check if Kubernetes has already been initialized.
   stat:
@@ -37,8 +37,8 @@
 
 # Set up nodes.
 - name: Get the kubeadm join command from the Kubernetes master.
-  shell: kubeadm token create --print-join-command
-  changed_when: False
+  command: kubeadm token create --print-join-command
+  changed_when: false
   when: kubernetes_role == 'master'
   register: kubernetes_join_command_result
 
@@ -47,7 +47,7 @@
     kubernetes_join_command: "{{ kubernetes_join_command_result.stdout }}"
   when: kubernetes_join_command_result.stdout is defined
   delegate_to: "{{ item }}"
-  delegate_facts: True
+  delegate_facts: true
   with_items: "{{ groups['all'] }}"
 
 - include_tasks: node-setup.yml

tasks/master-setup.yml

@@ -7,14 +7,14 @@
     --kubernetes-version {{ kubernetes_version }}
     --ignore-preflight-errors={{ kubernetes_ignore_preflight_errors }}
   register: kubeadmin_init
-  failed_when: False
-  when: kubernetes_init_stat.stat.exists == False
+  failed_when: false
+  when: kubernetes_init_stat.stat.exists == false
 
 - name: Print the init output to screen.
   debug: var=kubeadmin_init.stdout
   when:
     - kuberenetes_debug
-    - kubernetes_init_stat.stat.exists == False
+    - kubernetes_init_stat.stat.exists == false
 
 - name: Ensure .kube directory exists.
   file:
@@ -41,12 +41,12 @@
   command: "kubectl taint nodes --all node-role.kubernetes.io/master-"
   when:
     - kubernetes_allow_pods_on_master
-    - kubernetes_init_stat.stat.exists == False
+    - kubernetes_init_stat.stat.exists == false
 
 - name: Check if Kubernetes Dashboard UI service already exists.
   shell: kubectl get services --namespace kube-system | grep -q kubernetes-dashboard
-  changed_when: False
-  failed_when: False
+  changed_when: false
+  failed_when: false
   register: kubernetes_dashboard_service
   when: kubernetes_enable_web_ui
 

tasks/setup-Debian.yml

 ---
 - name: Ensure dependencies are installed.
   apt:
-    name: "{{ item }}"
+    name:
+      - apt-transport-https
+      - ca-certificates
     state: present
-  with_items:
-    - apt-transport-https
-    - ca-certificates
 
 - name: Add Kubernetes apt key.
   apt_key:
@@ -18,4 +17,4 @@
   apt_repository:
     repo: "{{ kubernetes_apt_repository }}"
     state: present
-    update_cache: yes
+    update_cache: false

tasks/setup-RedHat.yml

@@ -3,9 +3,9 @@
   yum_repository:
     name: kubernetes
     description: Kubernetes
-    enabled: yes
-    gpgcheck: yes
-    repo_gpgcheck: yes
+    enabled: true
+    gpgcheck: true
+    repo_gpgcheck: true
     baseurl: https://packages.cloud.google.com/yum/repos/kubernetes-el7-{{ kubernetes_yum_arch }}
     gpgkey:
       - https://packages.cloud.google.com/yum/doc/yum-key.gpg
@@ -24,4 +24,4 @@
   command: "yum -q makecache -y --disablerepo='*' --enablerepo='kubernetes'"
   when: kubernetes_rpm_key is changed
   args:
-    warn: no
+    warn: false

tests/README.md

-# Ansible Role tests
-
-To run the test playbook(s) in this directory:
-
-  1. Install and start Docker.
-  1. Download the test shim (see .travis.yml file for the URL) into `tests/test.sh`:
-    - `wget -O tests/test.sh https://gist.githubusercontent.com/geerlingguy/73ef1e5ee45d8694570f334be385e181/raw/`
-  1. Make the test shim executable: `chmod +x tests/test.sh`.
-  1. Run (from the role root directory) `distro=[distro] playbook=[playbook] ./tests/test.sh`
-
-If you don't want the container to be automatically deleted after the test playbook is run, add the following environment variables: `cleanup=false container_id=$(date +%s)`