Prepare docker tests for AZP. (#1482)

Backport of important parts of https://github.com/ansible-collections/community.docker/pull/48 to stable-1.

tests/integration/targets/setup_docker/library/current_container_facts.py

@@ -0,0 +1,101 @@
+#!/usr/bin/python
+#
+# (c) 2020 Matt Clay <mclay@redhat.com>
+# (c) 2020 Felix Fontein <felix@fontein.de>
+# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)
+
+# This module properly lives in community.docker; it has been vendored here
+# to support the 1.x.y docker integration tests.
+
+from __future__ import absolute_import, division, print_function
+__metaclass__ = type
+
+
+DOCUMENTATION = '''
+---
+module: current_container_facts
+short_description: Return facts about whether the module runs in a Docker container
+description:
+  - Return facts about whether the module runs in a Docker container.
+author:
+  - Felix Fontein (@felixfontein)
+'''
+
+EXAMPLES = '''
+- name: Get facts on current container
+  community.docker.current_container_facts:
+- name: Print information on current container when running in a container
+  ansible.builtin.debug:
+    msg: "Container ID is {{ ansible_module_container_id }}"
+  when: ansible_module_running_in_container
+'''
+
+RETURN = '''
+ansible_facts:
+    description: Ansible facts returned by the module
+    type: dict
+    returned: always
+    contains:
+        ansible_module_running_in_container:
+            description:
+              - Whether the module was able to detect that it runs in a container or not.
+            returned: always
+            type: bool
+        ansible_module_container_id:
+            description:
+              - The detected container ID.
+              - Contains an empty string if no container was detected.
+            returned: always
+            type: str
+        ansible_module_container_type:
+            description:
+              - The detected container environment.
+              - Contains an empty string if no container was detected.
+              - Otherwise, will be one of C(docker) or C(azure_pipelines).
+            returned: always
+            type: str
+            # choices:
+            #   - docker
+            #   - azure_pipelines
+'''
+
+import os
+
+from ansible.module_utils.basic import AnsibleModule
+
+
+def main():
+    module = AnsibleModule(dict(), supports_check_mode=True)
+
+    path = '/proc/self/cpuset'
+    container_id = ''
+    container_type = ''
+
+    if os.path.exists(path):
+        # File content varies based on the environment:
+        #   No Container: /
+        #   Docker: /docker/c86f3732b5ba3d28bb83b6e14af767ab96abbc52de31313dcb1176a62d91a507
+        #   Azure Pipelines (Docker): /azpl_job/0f2edfed602dd6ec9f2e42c867f4d5ee640ebf4c058e6d3196d4393bb8fd0891
+        #   Podman: /../../../../../..
+        with open(path, 'rb') as f:
+            contents = f.read().decode('utf-8')
+
+        cgroup_path, cgroup_name = os.path.split(contents.strip())
+
+        if cgroup_path == '/docker':
+            container_id = cgroup_name
+            container_type = 'docker'
+
+        if cgroup_path == '/azpl_job':
+            container_id = cgroup_name
+            container_type = 'azure_pipelines'
+
+    module.exit_json(ansible_facts=dict(
+        ansible_module_running_in_container=container_id != '',
+        ansible_module_container_id=container_id,
+        ansible_module_container_type=container_type,
+    ))
+
+
+if __name__ == '__main__':
+    main()

tests/integration/targets/setup_docker/tasks/RedHat-7.yml

@@ -42,4 +42,4 @@
   service:
     name: docker
     state: started
-  ignore_errors: "{{ ansible_virtualization_type == 'docker' }}"
+  ignore_errors: "{{ ansible_virtualization_type in ['docker', 'container', 'containerd'] }}"

tests/integration/targets/setup_docker/tasks/RedHat-8.yml

@@ -31,4 +31,4 @@
   service:
     name: docker
     state: started
-  ignore_errors: "{{ ansible_virtualization_type == 'docker' }}"
+  ignore_errors: "{{ ansible_virtualization_type in ['docker', 'container', 'containerd'] }}"

tests/integration/targets/setup_docker/tasks/main.yml

@@ -135,3 +135,16 @@
             images: "{{ docker_images.stdout_lines | default([]) }}"
 
       when: docker_cli_version is version('0.0', '>')
+
+    - name: Detect whether we are running inside a container
+      current_container_facts:
+
+    - name: Inspect current container
+      docker_container_info:
+        name: "{{ ansible_module_container_id }}"
+      register: current_container_info
+      when: ansible_module_running_in_container
+
+    - name: Determine network name
+      set_fact:
+        current_container_network_ip: "{{ (current_container_info.container.NetworkSettings.Networks | dictsort)[0].0 | default('') if ansible_module_running_in_container else '' }}"