If 'environ' is defined on *nix, make a dropin systemd config to set …

…it as EnvironmentFile

docker/defaults.yaml

@@ -35,6 +35,7 @@ docker:
       config: {}
       environ_file: /etc/default/docker
       environ: {}
+      dropin_file: /etc/systemd/system/docker.service.d/override.conf
       daemon_config_file: /etc/docker/daemon.json
       daemon_config: {}
 
@@ -104,6 +105,7 @@ docker:
     base: /usr/local
     source: /usr/local/src/docker/libs
     service: /usr/lib/systemd/system
+    dropin: /etc/systemd/system/docker.service.d
     tmp: /tmp/saltstack-formulas-docker-tmp
     lib: /var/lib/docker
   linux:

docker/software/config/clean.sls

@@ -15,5 +15,7 @@ docker-software-config-clean:
     - names:
       - {{ d.pkg.docker.environ_file }}
       - {{ d.pkg.docker.daemon_config_file }}
+      - {{ d.pkg.docker.dropin_file }}
+      - {{ d.dir.dropin }}
     - require:
       - sls: {{ sls_archive_clean if d.pkg.docker.use_upstream == 'archive' else sls_package_clean }}

docker/software/config/dropin.sls

@@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+# vim: ft=sls
+
+{%- set tplroot = tpldir.split('/')[0] %}
+{%- from tplroot ~ "/map.jinja" import data as d with context %}
+
+    {%- if 'environ' in d.pkg.docker and d.pkg.docker.environ and grains.os != 'Windows' %}
+        {%- from tplroot ~ "/libtofs.jinja" import files_switch with context %}
+        {%- set sls_environ = tplroot ~ '.software.config.environ' %}
+
+include:
+  - {{ sls_environ }}
+
+# Use a systemd dropin override to make use of the environ file
+docker-software-config-dropin-file:
+  file.managed:
+    - name: {{ d.pkg.docker.dropin_file }}
+    - makedirs: True
+    - mode: '0755'
+    - user: {{ d.identity.rootuser }}
+    - group: {{ d.identity.rootgroup }}
+    - require:
+      - sls: {{ sls_environ }}
+
+  ini.options_present:
+    - name: {{ d.pkg.docker.dropin_file }}
+    - sections:
+        Service:
+          EnvironmentFile: {{ d.pkg.docker.environ_file }}
+    - require:
+      - file: {{ d.pkg.docker.dropin_file }}
+
+    {%- endif %}

docker/software/config/init.sls

@@ -3,4 +3,5 @@
 
 include:
   - .environ
+  - .dropin
   - .daemon

docker/software/service/running.sls

@@ -7,6 +7,7 @@
     {%- if 'service' in d.pkg.docker and d.pkg.docker.service and grains.os != 'Windows' %}
         {%- set sls_config_daemon = tplroot ~ '.software.config.daemon' %}
         {%- set sls_environ = tplroot ~ '.software.config.environ' %}
+        {%- set sls_dropin = tplroot ~ '.software.config.dropin' %}
         {%- set sls_archive = tplroot ~ '.software.archive.install' %}
         {%- set sls_desktop = tplroot ~ '.software.desktop.install' %}
         {%- set sls_package = tplroot ~ '.software.package.install' %}
@@ -38,6 +39,13 @@ docker-software-service-running-unmasked:
         {%- endif %}
 
 docker-software-service-running-docker:
+  {%- if 'environ' in d.pkg.docker and d.pkg.docker.environ %}
+  cmd.run:
+    - name: systemctl daemon-reload
+    - onchanges:
+      - sls: {{ sls_dropin }}
+  {% endif %}
+
   service.running:
     - name: {{ d.pkg.docker.service.name }}
     - require:
@@ -48,6 +56,10 @@ docker-software-service-running-docker:
     - enable: True
     - watch:
       - file: docker-software-daemon-file-managed-daemon_file
+        {%- if 'environ' in d.pkg.docker and d.pkg.docker.environ %}
+      - sls: {{ sls_environ }}
+      - sls: {{ sls_dropin }}
+        {%- endif %}
 
         {%- if grains.kernel|lower == 'linux' %}