Improve tests: don't install daemon when running inside a container (#56)

* If running inside a container, only install docker CLI, not docker daemon.

ci_complete

* Fix OpenSUSE.

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

@@ -1,3 +1,4 @@
+---
 docker_cli_version: '0.0'
 docker_api_version: '0.0'
 docker_py_version: '0.0'
@@ -5,6 +6,8 @@ docker_skip_cleanup: yes
 docker_prereq_packages: []
 docker_packages:
   - docker-ce
+docker_cli_packages:
+  - docker-ce-cli
 
 docker_pip_extra_packages: []
 docker_pip_package: docker

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

@@ -27,7 +27,7 @@
 
   - name: Install Docker CE
     apt:
-      name: '{{ docker_packages }}'
+      name: '{{ docker_packages if needs_docker_daemon else docker_cli_packages }}'
       state: present
       update_cache: true
 

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

@@ -20,7 +20,7 @@
 
 - name: Install docker
   dnf:
-    name: "{{ docker_packages }}"
+    name: "{{ docker_packages if needs_docker_daemon else docker_cli_packages }}"
     state: present
     enablerepo: docker-ce-test
   notify: cleanup docker

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

@@ -34,7 +34,7 @@
 
 - name: Install docker
   yum:
-    name: "{{ docker_packages }}"
+    name: "{{ docker_packages if needs_docker_daemon else docker_cli_packages }}"
     state: present
   notify: cleanup docker
 
@@ -43,3 +43,4 @@
     name: docker
     state: started
   ignore_errors: "{{ ansible_virtualization_type in ['docker', 'container', 'containerd'] }}"
+  when: needs_docker_daemon

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

@@ -23,7 +23,7 @@
 
 - name: Install docker
   dnf:
-    name: "{{ docker_packages }}"
+    name: "{{ docker_packages if needs_docker_daemon else docker_cli_packages }}"
     state: present
   notify: cleanup docker
 
@@ -32,3 +32,4 @@
     name: docker
     state: started
   ignore_errors: "{{ ansible_virtualization_type in ['docker', 'container', 'containerd'] }}"
+  when: needs_docker_daemon

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

@@ -1,7 +1,7 @@
 ---
 - name: Install docker 17
   community.general.zypper:
-    name: "{{ docker_packages }}"
+    name: "{{ docker_packages if needs_docker_daemon else docker_cli_packages }}"
     force: yes
     disable_gpg_check: yes
     update_cache: yes

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

@@ -7,6 +7,13 @@
 - name: Setup Docker
   when: ansible_facts.distribution ~ ansible_facts.distribution_major_version not in  ['CentOS6', 'RedHat6']
   block:
+    - name: Detect whether we are running inside a container
+      current_container_facts:
+
+    - name: Determine whether Docker Daemon needs to be installed
+      set_fact:
+        needs_docker_daemon: '{{ not ansible_module_running_in_container }}'
+
     - name: Include distribution specific variables
       include_vars: "{{ lookup('first_found', params) }}"
       vars:
@@ -136,9 +143,6 @@
 
       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 }}"

tests/integration/targets/setup_docker/vars/Debian.yml

@@ -1,3 +1,4 @@
+---
 docker_prereq_packages:
   - apt-transport-https
   - ca-certificates

tests/integration/targets/setup_docker/vars/Fedora.yml

@@ -1,4 +1 @@
-docker_prereq_packages: []
-
-docker_packages:
-  - docker-ce
+---

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

@@ -1,3 +1,4 @@
+---
 docker_prereq_packages:
   - yum-utils
   - device-mapper-persistent-data

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

@@ -1,3 +1,4 @@
+---
 docker_prereq_packages:
   - yum-utils
   - device-mapper-persistent-data
@@ -7,3 +8,5 @@ docker_prereq_packages:
 docker_packages:
   - docker-ce-19.03.13
   - docker-ce-cli-19.03.13
+docker_cli_packages:
+  - docker-ce-cli-19.03.13

tests/integration/targets/setup_docker/vars/Suse.yml

@@ -1,2 +1,8 @@
+---
 docker_packages:
   - docker>=17
+
+# OpenSUSE 15 does not seem to have docker-client (https://software.opensuse.org/package/docker-client)
+# or any other Docker CLI-only package
+docker_cli_packages:
+  - docker>=17

tests/integration/targets/setup_docker/vars/Ubuntu-14.yml

@@ -1,3 +1,4 @@
+---
 docker_pip_extra_packages:
   # Installing requests >=2.12.0 on Ubuntu 14.04 breaks certificate validation. We restrict to an older version
   # to ensure out get_url tests work out fine. This is only an issue if pyOpenSSL is also installed.

tests/integration/targets/setup_docker/vars/default.yml

@@ -0,0 +1 @@
+---