feat(limitnofile): add support to systemd (#302)

Author: noelmcloughlin

docker/defaults.yaml

@@ -42,6 +42,7 @@ docker:
       service:
         name: docker
         env: ''
+        limitnofile: ~
       suffix: tgz
       commands:
         - docker

docker/files/default/systemd.ini.jinja

@@ -15,6 +15,9 @@ ExecStart={{ start }}
 ExecStop={{ stop }}
 PIDFile=/var/run/{{ name }}.pid
 Environment={{ '' if not env else env }}
+{%- if limitnofile != 'None' %}
+LimitNOFILE={{ limitnofile }}
+{%- endif %}
 
 [Install]
 WantedBy=multi-user.target

docker/software/archive/install.sls

@@ -94,6 +94,7 @@ docker-software-docker-archive-install-managed-service:
         name: {{ d.pkg.docker.service.name }}
         user: {{ d.identity.rootuser }}
         group: {{ d.identity.rootgroup }}
+        limitnofile: {{ d.pkg.docker.service.limitnofile }}
         workdir: {{ d.dir.lib }}
         env: {{ d.pkg.docker.service.env }}
         stop: ''