add postgres-exporter to docker-compose and pormetheus yml

docker-compose.metrics.yml

@@ -70,6 +70,7 @@ services:
     volumes:
       - ${PWD}:/srv/newsblur
   elasticsearch_exporter:
+    container_name: elasticsearch_exporter
     image: prometheuscommunity/elasticsearch-exporter:latest
     command:
       - '--es.uri=http://db_elasticsearch:9200'
@@ -78,3 +79,10 @@ services:
       - "9210:9114"
     depends_on:
       - db_elasticsearch
+  postgres_exporter:
+    container_name: postgres-exporter
+    image:  prometheuscommunity/postgres-exporter
+    environment:
+      DATA_SOURCE_NAME: 'postgresql://newsblur:newsblur@db_postgres:5432/postgres?sslmode=disable'
+    ports:
+    - '9187:9187'

docker/prometheus/prometheus.consul.yml.j2

@@ -229,3 +229,11 @@ scrape_configs:
       relabel_configs:
       - source_labels: ['__meta_consul_node']
         target_label: instance
+
+    - job_name: 'postgres exporter'
+      consul_sd_configs:
+      - server: 'consul.service.nyc1.consul:8500'
+        services: ['postgres_exporter']
+      relabel_configs:
+      - source_labels: ['__meta_consul_node']
+        target_label: instance

docker/prometheus/prometheus.docker.yml

@@ -222,3 +222,10 @@ scrape_configs:
       scheme: http
       tls_config:
         insecure_skip_verify: true
+
+    - job_name: 'postgres exporter'
+      static_configs:
+        - targets: ['postgres_exporter:9187']
+      scheme: http
+      tls_config:
+        insecure_skip_verify: true