Specify ES configuration for OSes with systemd

.kitchen.yml

@@ -22,10 +22,12 @@ platforms:
   - name: ubuntu-14.04
     driver_config:
       provision_command:
+        - apt-get install locales
         - locale-gen en_US.UTF-8
   - name: ubuntu-16.04
     driver_config:
       provision_command:
+        - apt-get install locales
         - locale-gen en_US.UTF-8
       run_command: /sbin/init
 
@@ -60,6 +62,9 @@ suites:
               lang-python: lang-python
             jvm_opts:
               - '# Test String'
+            systemd:
+              Service:
+                '# Test': String
 
 verifier:
   name: shell

README.rst

@@ -53,6 +53,11 @@ Configures defaults/sysconfig env vars for the Elasticsearch service.
 
 Allows configuration of elasticsearch plugins.
 
+``elasticsearch.systemd``
+-------------------------
+
+Configure system limits for the Elasticsearch service [on systems that use systemd](https://www.elastic.co/guide/en/elasticsearch/reference/current/setting-system-settings.html#systemd).
+
 
 Notes
 =====

elasticsearch/files/systemd.conf

@@ -0,0 +1,6 @@
+{%- for section, unit in systemd.iteritems() -%}
+[{{ section }}]
+{% for key, value in unit.iteritems() -%}
+{{ key }}={{ value }}
+{% endfor %}
+{% endfor %}

elasticsearch/init.sls

@@ -4,5 +4,6 @@ include:
   - elasticsearch.config
   - elasticsearch.sysconfig
   - elasticsearch.jvmopts
+  - elasticsearch.systemd
   - elasticsearch.service
   - elasticsearch.plugins

elasticsearch/systemd.sls

@@ -0,0 +1,31 @@
+include:
+  - elasticsearch.pkg
+
+{%- if salt['pillar.get']('elasticsearch:systemd') %}
+/etc/systemd/system/elasticsearch.service.d:
+  file.directory:
+    - user: root
+    - group: root
+    - mode: 0755
+    - makedirs: True
+    - require_in:
+      - service: elasticsearch
+
+/etc/systemd/system/elasticsearch.service.d/elasticsearch.conf:
+  file.managed:
+    - source: salt://elasticsearch/files/systemd.conf
+    - user: root
+    - group: root
+    - mode: 0644
+    - template: jinja
+    - require:
+      - sls: elasticsearch.pkg
+    - watch_in:
+      - service: elasticsearch_service
+    - context:
+        systemd: {{ salt['pillar.get']('elasticsearch:systemd') }}
+  module.run:
+    - name: service.systemctl_reload
+    - onchanges:
+      - file: /etc/systemd/system/elasticsearch.service.d/elasticsearch.conf
+{%- endif %}

test/integration/version-5.0/testinfra/test_elasticsearch.py

@@ -16,3 +16,6 @@ def test_service_is_running_and_enabled(Service):
 
 def test_jvm_opts(File):
     assert File('/etc/elasticsearch/jvm.options').contains('# Test String')
+
+def test_systemd_config(File):
+    assert File('/etc/systemd/system/elasticsearch.service.d/elasticsearch.conf').contains('# Test=String')