Merge pull request #2 from spreaker/enable-python-faulthandler-on-pro…

…metheus-jenkins-exporter

Enable python faulthandler and introduce a Docker-base dev environment

.gitignore

@@ -1,3 +1,4 @@
 dist
 MANIFEST
 prometheus_jenkins_exporter.egg-info
+__pycache__/

Dockerfile

@@ -0,0 +1,11 @@
+FROM alpine:3.8
+
+# Installing required packages
+RUN apk add --update --no-cache \
+    python3
+
+# Install dependencies
+COPY requirements.txt /workspace/prometheus-jenkins-exporter/requirements.txt
+RUN cd /workspace/prometheus-jenkins-exporter && pip3 install -r requirements.txt
+
+WORKDIR /workspace/prometheus-jenkins-exporter

README.md

@@ -42,6 +42,12 @@ jenkins_plugins_enabled_with_update_count
 
 ## Contributions
 
+### Run the development environment
+
+```
+docker-compose build && docker-compose run dev sh
+```
+
 ### Ensure the code is PEP 8 compliant
 
 `pycodestyle --max-line-length=180 prometheus_jenkins_exporter/*.py`

docker-compose.yml

@@ -0,0 +1,12 @@
+version: "3"
+
+services:
+  dev:
+    build:
+      context:    .
+      dockerfile: Dockerfile
+    command: [ "sh" ]
+    ports:
+      - 8000:8000
+    volumes:
+      - /workspace/prometheus-jenkins-exporter:/workspace/prometheus-jenkins-exporter:delegated

prometheus_jenkins_exporter/exporter.py

@@ -4,13 +4,18 @@
 import time
 import os
 import signal
+import faulthandler
 from urllib.parse import urlencode, quote_plus
 from prometheus_client import start_http_server
 from prometheus_client.core import GaugeMetricFamily, REGISTRY
 import logging
 from pythonjsonlogger import jsonlogger
 
 
+# Enable dumps on stderr in case of segfault
+faulthandler.enable()
+
+
 class JenkinsApiClient():
     def __init__(self, config):
         self.config = config