Merge pull request #2357 from octarinesec/eyeofthefrog/set_TasksMax_infinity_for_ubuntu

Set TasksMax to infinity on any OS with systemd

roles/docker/tasks/systemd.yml

@@ -12,9 +12,9 @@
   when: http_proxy is defined or https_proxy is defined
 
 - name: get systemd version
-  command: rpm -q --qf '%{V}\n' systemd
+  command: systemctl --version | head -n 1 | cut -d " " -f 2
   register: systemd_version
-  when: ansible_os_family == "RedHat" and not is_atomic
+  when: not is_atomic
   changed_when: false
 
 - name: Write docker.service systemd file

roles/docker/templates/docker.service.j2

@@ -24,7 +24,7 @@ ExecStart={{ docker_bin_dir }}/docker{% if installed_docker_version.stdout|versi
           $DOCKER_NETWORK_OPTIONS \
           $DOCKER_DNS_OPTIONS \
           $INSECURE_REGISTRY
-{% if ansible_os_family == "RedHat" and systemd_version.stdout|int >= 226 %}
+{% if not is_atomic and systemd_version.stdout|int >= 226 %}
 TasksMax=infinity
 {% endif %}
 LimitNOFILE=1048576