Add quickstart for prometheus. (#1562)

quickstart-prometheus-config.yml

@@ -0,0 +1,20 @@
+global:
+  scrape_interval:     15s # By default, scrape targets every 15 seconds.
+
+  external_labels:
+    monitor: 'codelab-monitor'
+
+scrape_configs:
+  - job_name: 'prometheus'
+
+    scrape_interval: 5s
+
+    static_configs:
+      - targets: ['localhost:9090']
+  - job_name: 'hydra'
+
+    # Override the global default and scrape targets from this job every 5 seconds.
+    scrape_interval: 5s
+    metrics_path: /metrics/prometheus
+    static_configs:
+      - targets: ['hydra:4445']

quickstart-prometheus.yml

@@ -0,0 +1,25 @@
+###########################################################################
+#######             FOR DEMONSTRATION PURPOSES ONLY                 #######
+###########################################################################
+#                                                                         #
+# If you have not yet read the tutorial, do so now:                       #
+#  https://www.ory.sh/docs/hydra/5min-tutorial                            #
+#                                                                         #
+# This set up is only for demonstration purposes. The login               #
+# endpoint can only be used if you follow the steps in the tutorial.      #
+#                                                                         #
+###########################################################################
+
+version: '3'
+
+services:
+  prometheus:
+    image: prom/prometheus:v2.12.0
+    ports:
+      - "9090:9090"
+    depends_on:
+      - hydra
+    command:
+      --config.file=/etc/prometheus/prometheus.yml
+    volumes:
+      - ./quickstart-prometheus-config.yml:/etc/prometheus/prometheus.yml