Add haproxy_exporter

prometheus/defaults.yaml

@@ -30,3 +30,10 @@ prometheus:
       source_hash: sha1=89ac98c062315ba35eda257ca88c8c4b43f38d47
       args:
         config_file: /etc/prometheus/blackbox_exporter.yml
+    haproxy:
+      version: 0.7.1.linux-amd64
+      install_dir: /opt
+      source: https://github.com/prometheus/haproxy_exporter/releases/download/v0.7.1/haproxy_exporter-0.7.1.linux-amd64.tar.gz
+      source_hash: sha1=56849253e280db3db2aa80f1013ecfe242536d32
+      args:
+        scrape_uri: 'http://localhost/stats;csv'

prometheus/exporters/haproxy.sls

@@ -0,0 +1,49 @@
+{% from "prometheus/map.jinja" import prometheus with context %}
+{%- set version_path = haproxy.exporters.haproxy.install_dir ~ "/haproxy_exporter-" ~ prometheus.exporters.haproxy.version %}
+
+include:
+  - prometheus.user
+
+haproxy_exporter_tarball:
+  archive.extracted:
+    - name: {{ prometheus.exporters.haproxy.install_dir }}
+    - source: {{ prometheus.exporters.haproxy.source }}
+    - source_hash: {{ prometheus.exporters.haproxy.source_hash }}
+    - archive_format: tar
+    - if_missing: {{ version_path }}
+
+haproxy_exporter_bin_link:
+  file.symlink:
+    - name: /usr/bin/haproxy_exporter
+    - target: {{ version_path }}/haproxy_exporter
+    - require:
+      - archive: haproxy_exporter_tarball
+
+haproxy_exporter_defaults:
+  file.managed:
+    - name: /etc/default/haproxy_exporter
+    - source: salt://prometheus/files/default-haproxy_exporter.jinja
+    - template: jinja
+    - defaults:
+        scrape_uri: {{ prometheus.exporters.haproxy.args.scrape_uri }}
+
+haproxy_exporter_service_unit:
+  file.managed:
+{%- if grains.get('init') == 'systemd' %}
+    - name: /etc/systemd/system/haproxy_exporter.service
+    - source: salt://prometheus/files/haproxy_exporter.systemd.jinja
+{%- elif grains.get('init') == 'upstart' %}
+    - name: /etc/init/haproxy_exporter.conf
+    - source: salt://prometheus/files/haproxy_exporter.upstart.jinja
+{%- endif %}
+    - require_in:
+      - file: haproxy_exporter_service
+
+haproxy_exporter_service:
+  service.running:
+    - name: haproxy_exporter
+    - enable: True
+    - reload: True
+    - watch:
+      - file: haproxy_exporter_defaults
+      - file: haproxy_exporter_bin_link

prometheus/files/default-haproxy_exporter.jinja

@@ -0,0 +1,5 @@
+# Set the command-line arguments to pass to the haproxy_exporter service.
+ARGS='-haproxy.scrape-uri="{{scrape_uri}}"'
+
+# Haproxy exporter supports the following options:
+#   -haproxy.scrape-uri string

prometheus/files/haproxy_exporter.systemd.jinja

@@ -0,0 +1,18 @@
+[Unit]
+Description=Prometheus haproxy exporter
+Documentation=https://github.com/prometheus/haproxy_exporter
+Wants=basic.target
+After=basic.target network.target
+
+[Service]
+User=prometheus
+Group=prometheus
+EnvironmentFile=/etc/default/haproxy_exporter
+ExecStart=/usr/bin/haproxy_exporter $ARGS
+ExecReload=/bin/kill -HUP $MAINPID
+KillMode=process
+Restart=always
+RestartSec=42s
+
+[Install]
+WantedBy=multi-user.target

prometheus/files/haproxy_exporter.upstart.jinja

@@ -0,0 +1,30 @@
+# Prometheus Haproxy exporter (Upstart unit)
+description "Prometheus Haproxy exporter"
+start on runlevel [2345]
+stop on runlevel [06]
+
+env HAPROXY_EXPORTER=/usr/bin/haproxy_exporter
+env USER=prometheus
+env GROUP=prometheus
+env DEFAULTS=/etc/default/haproxy_exporter
+env RUNDIR=/var/run/haproxy_exporter
+env PID_FILE=/var/run/haproxy_exporter/haproxy_exporter.pid
+pre-start script
+  [ -e $DEFAULTS ] && . $DEFAULTS
+
+  mkdir -p $RUNDIR           || true
+  chmod 0750 $RUNDIR         || true
+  chown $USER:$GROUP $RUNDIR || true
+end script
+
+script
+    # read settings like GOMAXPROCS from "/etc/default/haproxy_exporter", if available.
+    [ -e $DEFAULTS ] && . $DEFAULTS
+
+    export GOMAXPROCS=${GOMAXPROCS:-2}
+    exec start-stop-daemon -c $USER -g $GROUP -p $PID_FILE -x $HAPROXY_EXPORTER -S -- $ARGS
+end script
+
+respawn
+respawn limit 10 10
+kill timeout 10