feat(archive): managing env vars in systemd unit

* add env pillar under component:name:service
* update systemd template

prometheus/archive/install.sls

@@ -126,6 +126,7 @@ prometheus-archive-install-{{ name }}-managed-service:
         name: {{ name }}
         user: {{ name }}
         group: {{ name }}
+        env: {{ p.pkg.component[name]['service'].get('env', [])|tojson }}
         workdir: {{ p.dir.var }}/{{ name }}
         stop: ''
                {%- if name in ('node_exporter', 'consul_exporter') or 'config_file' not in p.pkg.component[name] %}

prometheus/files/default/systemd.ini.jinja

@@ -8,6 +8,9 @@ After=
 Documentation=https://github.com/saltstack-formulas/prometheus-formula
 
 [Service]
+{% for var in env %}
+Environment={{ var }}
+{% endfor %}
 User={{ user }}
 Group={{ group }}
 WorkingDirectory={{ workdir }}