Docker compose with prometheus

Dockerfile

@@ -1,8 +1,12 @@
-FROM centos:7
+FROM golang:alpine
 
-MAINTAINER Yogesh Sharma <[email protected]>
+WORKDIR /source
+COPY . /source
+RUN apk --update-cache add --virtual \
+  build-dependencies \
+  build-base \
+  && go mod download \
+  && make all
 
-COPY postgresql-prometheus-adapter start.sh /
-
-ENTRYPOINT ["/start.sh"]
+ENTRYPOINT ["/bin/sh", "/source/start.sh"]
 

docker-compose.yml

@@ -0,0 +1,90 @@
+# This docker compose setup configures:
+# - the Unleash server instance + the necessary backing Postgres database
+# - the Unleash proxy
+#
+# To learn more about all the parts of Unleash, visit
+# https://docs.getunleash.io
+#
+# NOTE: please do not use this configuration for production setups.
+# Unleash does not take responsibility for any data leaks or other
+# problems that may arise as a result.
+#
+# This is intended to be used for demo, development, and learning
+# purposes only.
+
+version: "3.9"
+services:
+  # The Unleash server contains the Unleash configuration and
+  # communicates with server-side SDKs and the Unleash Proxy
+  db:
+    ports:
+      - "5432:5432"
+    image: postgres:15
+    environment:
+      # create a database called `db`
+      POSTGRES_DB: "db"
+      POSTGRES_PASSWORD: "unleash"
+      # trust incoming connections blindly (DON'T DO THIS IN PRODUCTION!)
+      POSTGRES_HOST_AUTH_METHOD: "trust"
+    healthcheck:
+      test:
+        [
+          "CMD",
+          "pg_isready",
+          "--username=postgres",
+          "--host=127.0.0.1",
+          "--port=5432",
+        ]
+      interval: 2s
+      timeout: 1m
+      retries: 5
+      start_period: 10s
+  node1:
+    image: prom/node-exporter
+    ports:
+      - "9100:9100"
+    depends_on:
+      db:
+        condition: service_healthy
+  prom:
+    image: prom/prometheus:latest
+    ports:
+      - "9090:9090"
+    volumes:
+      - ./prometheus.yml:/prometheus/prometheus.yml
+    command: "--web.enable-remote-write-receiver"
+    depends_on:
+      db:
+        condition: service_healthy
+    # healthcheck:
+    #   test: ["CMD", "curl", "localhost:9090"]
+    #   interval: 1s
+    #   timeout: 1m
+    #   retries: 5
+    #   start_period: 15s
+  web:
+    image: crunchydata/postgresql-prometheus-adapter:latest
+    build:
+      context: .
+    ports:
+      - "9201:9201"
+    environment:
+      DATABASE_URL: "postgres://postgres:unleash@db:5432/db"
+      web_listen_address: ":9201"
+      web_telemetry_path: "/metrics"
+      log_level: info
+      log_format: json
+      pg_partition: "hourly"
+      pg_commit_secs: 15
+      pg_commit_rows: 20000
+      pg_threads: 1
+      parser_threads: 5
+    depends_on:
+      db:
+        condition: service_healthy
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:9201/write"]
+      interval: 1s
+      timeout: 1m
+      retries: 5
+      start_period: 15s

makefile

@@ -12,12 +12,12 @@ all: $(TARGET)
 build: $(TARGET)
 
 $(TARGET): main.go $(SOURCES)
-	go build -ldflags="-X 'main.Version=${VERSION}'" -o $(TARGET)
+	go build -ldflags="-X 'main.Version=${VERSION}' -extldflags '-static'" -o $(TARGET)
 
 container: $(TARGET) Dockerfile
 	@#podman rmi $(ORGANIZATION)/$(TARGET):latest $(ORGANIZATION)/$(TARGET):$(VERSION)
-	podman build -t $(ORGANIZATION)/$(TARGET):latest .
-	podman tag $(ORGANIZATION)/$(TARGET):latest $(ORGANIZATION)/$(TARGET):$(VERSION)
+	docker build -t $(ORGANIZATION)/$(TARGET):latest .
+	# podman tag $(ORGANIZATION)/$(TARGET):latest $(ORGANIZATION)/$(TARGET):$(VERSION)
 
 container-save: container
 	rm -f $(TARGET)-$(VERSION).tar

prometheus.yml

@@ -0,0 +1,21 @@
+global:
+  scrape_interval: 15s # By default, scrape targets every 15 seconds.
+
+# A scrape configuration containing exactly one endpoint to scrape:
+# Here it's Prometheus itself.
+scrape_configs:
+  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config.
+  - job_name: "prometheus"
+
+    # Override the global default and scrape targets from this job every 5 seconds.
+    scrape_interval: 5s
+
+    static_configs:
+      - targets: ["localhost:9090"]
+      - targets: ["node1:9100"]
+        labels:
+          group: "test"
+remote_write:
+  - url: "http://web:9201/write"
+remote_read:
+  - url: "http://web:9201/read"

start.sh

@@ -1,15 +1,15 @@
 #!/bin/bash
 
 if [[ "${DATABASE_URL}" == "" ]]; then
-  echo 'Missing DATABASE_URL'
-  echo 'example -e DATABASE_URL="user=<db user> password=<db user password> host=<db host> port=<db port> database=<db name>"'
-  exit 1
+	echo 'Missing DATABASE_URL'
+	echo 'example -e DATABASE_URL="user=<db user> password=<db user password> host=<db host> port=<db port> database=<db name>"'
+	exit 1
 fi
 
 trap shutdown INT
 
 function shutdown() {
-  pkill -SIGINT postgresql-prometheus-adapter
+	pkill -SIGINT postgresql-prometheus-adapter
 }
 
 adapter_send_timeout=${adapter_send_timeout:-'30s'}
@@ -23,27 +23,26 @@ pg_commit_rows=${pg_commit_rows:-20000}
 pg_threads="${pg_threads:-1}"
 parser_threads="${parser_threads:-5}"
 
-echo /postgresql-prometheus-adapter \
-  --adapter-send-timeout=${adapter_send_timeout} \
-  --web-listen-address=${web_listen_address} \
-  --web-telemetry-path=${web_telemetry_path} \
-  --log.level=${log_level} \
-  --log.format=${log_format} \
-  --pg-partition=${pg_partition} \
-  --pg-commit-secs=${pg_commit_secs} \
-  --pg-commit-rows=${pg_commit_rows} \
-  --pg-threads=${pg_threads} \
-  --parser-threads=${parser_threads}
-
-/postgresql-prometheus-adapter \
-  --adapter-send-timeout=${adapter_send_timeout} \
-  --web-listen-address=${web_listen_address} \
-  --web-telemetry-path=${web_telemetry_path} \
-  --log.level=${log_level} \
-  --log.format=${log_format} \
-  --pg-partition=${pg_partition} \
-  --pg-commit-secs=${pg_commit_secs} \
-  --pg-commit-rows=${pg_commit_rows} \
-  --pg-threads=${pg_threads} \
-  --parser-threads=${parser_threads}
+echo /source/postgresql-prometheus-adapter \
+	--adapter-send-timeout=${adapter_send_timeout} \
+	--web-listen-address=${web_listen_address} \
+	--web-telemetry-path=${web_telemetry_path} \
+	--log.level=${log_level} \
+	--log.format=${log_format} \
+	--pg-partition=${pg_partition} \
+	--pg-commit-secs=${pg_commit_secs} \
+	--pg-commit-rows=${pg_commit_rows} \
+	--pg-threads=${pg_threads} \
+	--parser-threads=${parser_threads}
 
+/source/postgresql-prometheus-adapter \
+	--adapter-send-timeout=${adapter_send_timeout} \
+	--web-listen-address=${web_listen_address} \
+	--web-telemetry-path=${web_telemetry_path} \
+	--log.level=${log_level} \
+	--log.format=${log_format} \
+	--pg-partition=${pg_partition} \
+	--pg-commit-secs=${pg_commit_secs} \
+	--pg-commit-rows=${pg_commit_rows} \
+	--pg-threads=${pg_threads} \
+	--parser-threads=${parser_threads}