[ADD]Uptime check

uptime/base.yml

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+version: '2.4'
+
+services:
+
+  check:
+    build: ./check
+    image: registry.yaltik.net/uptimecheck:yaltik

uptime/check/Dockerfile

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+FROM oraclelinux:8
+MAINTAINER Yaltik - Fabien Bourgeois <fabien@yaltik.com>
+
+RUN dnf -y install cronie python3 python3-requests
+
+COPY check.py ./
+COPY crontab ./
+COPY launch.sh ./
+
+CMD bash launch.sh

uptime/check/check.py

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+# -*- coding: utf-8 -*-
+
+"""
+Uptime check, at the moment HTTPS only domains
+Usage of own healthchecks.io instance and ENV
+"""
+
+from os import environ
+from requests import get, post, RequestException
+
+hc_root = environ.get('HC_ROOT', '')
+# HOSTS are in form hostname|uuid:hostname2|uuid...
+hosts = environ.get('HOSTS', '').split(':')
+# Domains are in form of example.org,example.net:hostname.org:another.net
+domains = environ.get('DOMAINS', '').split(':')
+
+config = {}
+for host in zip(hosts, domains):
+    host_data = host[0].split('|')
+    config[host_data[0]] = {'url': '%s/ping/%s' % (hc_root, host_data[1]),
+                            'domains': host[1].split(',')}
+
+def check_domain(domain):
+    try:
+        r = get('https://%s' % domain)
+    except Exception as e:
+        return e
+    return r.status_code
+
+def ping_with_info(url, fail=False, data=None):
+    try:
+        if fail:
+            url = '%s/fail' % url
+        post(url, timeout=10, data=data)
+    except RequestException as e:
+        print("Ping failed: %s" % e)
+
+for host, settings in config.items():
+    print('Checking %s : %s' % (', '.join(settings['domains']), host))
+    fail = False
+    data = []
+    for domain in settings['domains']:
+        status = check_domain(domain)
+        if not fail and status != 200:
+            fail = True
+        data.append('%s : %s' % (domain, status))
+    ping_with_info(settings['url'], fail=fail, data='\n'.join(data))

uptime/check/crontab

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+# uptime check, default every 15 minutes
+# m h dom mon dow user command
+*/15 * * * * /usr/bin/python3 /check.py >> /var/log/cron.log 2>&1
+# empty line needed

uptime/check/launch.sh

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+#!/bin/bash
+
+printenv >> /etc/environment
+crontab ./crontab && touch /var/log/cron.log && crond && tail -f /var/log/cron.log