Add rabbitmq exporter support

prometheus/exporter/rabbitmq.sls

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+{% from "prometheus/map.jinja" import prometheus with context %}
+
+include:
+  - prometheus.user
+
+rabbitmq_exporter_tarball:
+  archive.extracted:
+    - name: {{ prometheus.exporter.rabbitmq.install_dir }}
+    - source: {{ prometheus.exporter.rabbitmq.source }}
+    - source_hash: {{ prometheus.exporter.rabbitmq.source_hash }}
+    - user: {{ prometheus.user }}
+    - group: {{ prometheus.group }}
+    - archive_format: tar
+    - if_missing: {{ prometheus.exporter.rabbitmq.version_path }}
+
+rabbitmq_exporter_bin_link:
+  file.symlink:
+    - name: /usr/bin/rabbitmq_exporter
+    - target: {{ prometheus.exporter.rabbitmq.version_path }}/rabbitmq_exporter
+    - require:
+      - archive: rabbitmq_exporter_tarball
+
+rabbitmq_exporter_defaults:
+  file.managed:
+    - name: /etc/default/rabbitmq_exporter
+    - source: salt://prometheus/files/default-rabbitmq_exporter.jinja
+    - template: jinja
+
+rabbitmq_exporter_service_unit:
+  file.managed:
+{%- if grains.get('init') == 'systemd' %}
+    - name: /etc/systemd/system/rabbitmq_exporter.service
+    - source: salt://prometheus/files/rabbitmq_exporter.systemd.jinja
+{%- elif grains.get('init') == 'upstart' %}
+    - name: /etc/init/rabbitmq_exporter.conf
+    - source: salt://prometheus/files/rabbitmq_exporter.upstart.jinja
+{%- endif %}
+    - require_in:
+      - file: rabbitmq_exporter_service
+
+rabbitmq_exporter_service:
+  service.running:
+    - name: rabbitmq_exporter
+    - enable: True
+    - reload: True
+    - watch:
+      - file: rabbitmq_exporter_service_unit
+      - file: rabbitmq_exporter_defaults
+      - file: rabbitmq_exporter_bin_link

prometheus/files/default-rabbitmq.jinja

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+#https://github.com/kbudde/rabbitmq_exporter
+RABBIT_CAPABILITIES=no_sort,bert
+
+
+#Environment variable|default|description
+#--------------------|-------|------------
+#RABBIT_URL | <http://localhost:15672>| url to rabbitMQ management plugin
+#RABBIT_USER | guest | username for rabbitMQ management plugin
+#RABBIT_PASSWORD | guest | password for rabbitMQ management plugin
+#RABBIT_USER_FILE| | location of file with username (useful for docker secrets)
+#RABBIT_PASSWORD_FILE | | location of file with password (useful for docker secrets)
+#PUBLISH_PORT | 9090 | Listening port for the exporter
+#OUTPUT_FORMAT | TTY | Log ouput format. TTY and JSON are suported
+#LOG_LEVEL | info | log level. possible values: "debug", "info", "warning", "error", "fatal", or "panic"
+#CAFILE | ca.pem | path to root certificate for access management plugin. Just needed if self signed certificate is used. Will be ignored if the file does not exist
+#SKIPVERIFY | false | true/0 will ignore certificate errors of the management plugin
+#INCLUDE_QUEUES | .* | reqgex queue filter. just matching names are exported
+#SKIP_QUEUES | ^$ |regex, matching queue names are not exported (useful for short-lived rpc queues). First performed INCLUDE, after SKIP
+#RABBIT_CAPABILITIES | | comma-separated list of extended scraping capabilities supported by the target RabbitMQ server
+#RABBIT_EXPORTERS | exchange,node,overview,queue | List of enabled modules. Just "connections" is not enabled by default

prometheus/files/rabbitmq_exporter.systemd.jinja

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+[Unit]
+Description=Prometheus rabbitmq exporter
+Documentation=https://github.com/kbudde/rabbitmq_exporter
+Wants=basic.target
+After=basic.target network.target
+
+[Service]
+User=prometheus
+Group=prometheus
+EnvironmentFile=/etc/default/rabbitmq_exporter
+ExecStart=/usr/bin/rabbitmq_exporter
+ExecReload=/bin/kill -HUP $MAINPID
+KillMode=process
+Restart=always
+RestartSec=42s
+
+[Install]
+WantedBy=multi-user.target