feat(exporter): add metrics & upgrade docker+golang

Author: Alexandre-io

CHANGELOG.md

@@ -0,0 +1,8 @@
+2.0.0 / 2020-08-10
+=================
+  * Upgrade Golang
+  * Upgrade dependencies
+  * Change default port (cf. https://github.com/prometheus/prometheus/wiki/Default-port-allocations)
+  * Use Alpine linux instead of Debian (864MB vs 427MB)
+  * Add new metrics
+  * Rename metrics

Dockerfile

@@ -1,25 +1,29 @@
-FROM golang:1.12.7-buster
+FROM golang:1.14.7-alpine3.12
+
+# Install bash
+RUN apk add --no-cache bash
 
 # Set the Current Working Directory inside the container
-WORKDIR $GOPATH/src/wordpress_exporter
+WORKDIR /go/src/app
 
-# Copy sources.
+# Copy sources
 COPY . .
 
-# Download all the dependencies.
+# Download all the dependencies
 RUN go get -d -v ./...
 
 # Install the package
 RUN go install -v ./...
 
+# Default env
 ENV WORDPRESS_DB_HOST="" \
     WORDPRESS_DB_PORT="3306" \
     WORDPRESS_DB_USER="" \
     WORDPRESS_DB_PASSWORD="" \
     WORDPRESS_DB_NAME="" \
     WORDPRESS_TABLE_PREFIX="wp_"
 
-EXPOSE 9117
+EXPOSE 9850
 
 ADD /docker-entrypoint.sh /docker-entrypoint.sh
 

Gopkg.lock

@@ -1,6 +1,6 @@
 MIT License
 
-Copyright (c) 2019 Alexandre L.
+Copyright (c) 2020 Alexandre L.
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal

Gopkg.toml

@@ -5,7 +5,7 @@ Inspired by [kotsis/wordpress_exporter](https://github.com/kotsis/wordpress_expo
 
 # Usage of wordpress_exporter
 ```sh
-docker run --name wordpress_exporter -p 9117:9117 -e WORDPRESS_DB_HOST="127.0.0.1" -e WORDPRESS_DB_PORT="3306" -e WORDPRESS_DB_USER="wordpress" -e WORDPRESS_DB_NAME="wordpress" -e WORDPRESS_DB_PASSWORD="wordpress" -e WORDPRESS_TABLE_PREFIX="wp_" -d alexandreio/wordpress_exporter:latest
+docker run --name wordpress_exporter -p 9850:9850 -e WORDPRESS_DB_HOST="127.0.0.1" -e WORDPRESS_DB_PORT="3306" -e WORDPRESS_DB_USER="wordpress" -e WORDPRESS_DB_NAME="wordpress" -e WORDPRESS_DB_PASSWORD="wordpress" -e WORDPRESS_TABLE_PREFIX="wp_" -d alexandreio/wordpress_exporter:latest
 ```
 # Prometheus configuration for wordpress_exporter
 For Prometheus to start scraping the metrics you have to edit /etc/prometheus/prometheus.yml and add:
@@ -15,8 +15,5 @@ For Prometheus to start scraping the metrics you have to edit /etc/prometheus/pr
     # metrics_path defaults to '/metrics'
     # scheme defaults to 'http'.
     static_configs:
-    - targets: ['localhost:9117']
+    - targets: ['localhost:9850']
 ```
-
-# Grafana
-You can find an example of WordPress dashboard in examples/grafana/dashboard.json