Switched to using Debian 10-slim

Dockerfile

@@ -1,14 +1,17 @@
-FROM ubuntu:18.04
-RUN apt-get update && apt-get upgrade -y && apt-get install wget gnupg expect -y && \
-    wget -O - https://packages.icinga.com/icinga.key | apt-key add -
-RUN printf "deb http://packages.icinga.com/ubuntu icinga-bionic main\ndeb-src http://packages.icinga.com/ubuntu icinga-bionic main" > /etc/apt/sources.list.d/icinga2.list && \
-    apt-get update && apt-get install icinga2 -y && \
+FROM debian:10-slim
+RUN apt-get update && apt-get install wget gnupg -y && \
+    printf "deb http://packages.icinga.com/debian icinga-buster main\ndeb-src http://packages.icinga.com/debian icinga-buster main" > /etc/apt/sources.list.d/icinga2.list && \
+    wget -O - https://packages.icinga.com/icinga.key | apt-key add - && \
+    apt-get update && apt-get --no-install-recommends install icinga2 monitoring-plugins tzdata -y && \
     mkdir /run/icinga2 && chown nagios:nagios /run/icinga2 && \
     mkdir -p /var/lib/icinga2/certs && \
-    chown -R nagios:nagios /var/lib/icinga2/certs
+    chown -R nagios:nagios /var/lib/icinga2/certs && \
+    apt-get remove -y wget gnupg && \
+    apt-get autoremove -y && \
+    apt-get clean 
 
 COPY create-satellite.sh /create-satellite.sh
 COPY run-icinga.sh /run-icinga.sh
 RUN chmod +x /create-satellite.sh ; chmod +x /run-icinga.sh
-
+EXPOSE 5665
 ENTRYPOINT ["/run-icinga.sh"]

README.md

@@ -1,10 +1,40 @@
 # icinga-satellite
 An easy-to-use Dockerized Icinga2 satellite setup. It could be used as an
 Icinga2 agent aswell, but I don't think that would make much sense. The goal
-is instead to create an easy-to-deploy satellite Docker.
+is instead to create an easy-to-deploy satellite image.
+
+![Docker Image Size (latest by date)](https://img.shields.io/docker/image-size/jackbenny/icinga-satellite?sort=date)
+![Docker Pulls](https://img.shields.io/docker/pulls/jackbenny/icinga-satellite)
+![Docker Stars](https://img.shields.io/docker/stars/jackbenny/icinga-satellite)
+![Docker Cloud Automated build](https://img.shields.io/docker/cloud/automated/jackbenny/icinga-satellite)
+![Docker Cloud Build Status](https://img.shields.io/docker/cloud/build/jackbenny/icinga-satellite)
+
+## Tags and their respective Dockerfile
+
+### Main tags
+* [0.5, latest](https://github.com/jackbenny/icinga-satellite/blob/master/Dockerfile)
+* [0.4](https://github.com/jackbenny/icinga-satellite/blob/0.4/Dockerfile)
+* [0.3](https://github.com/jackbenny/icinga-satellite/blob/0.3/Dockerfile)
+* [0.2](https://github.com/jackbenny/icinga-satellite/blob/0.2/Dockerfile)
+* [0.1](https://github.com/jackbenny/icinga-satellite/blob/0.1/Dockerfile)
+
+### Alpine tags (currently has some problems)
+* [0.1.1-alpine](https://github.com/jackbenny/icinga-satellite/blob/0.1.1-alpine/Dockerfile)
+* [0.1-alpine](https://github.com/jackbenny/icinga-satellite/blob/0.1-alpine/Dockerfile)
+
+> **NOTE:** Currently there are some problems with the Alpine image. 
+> Use the *main images* instead, tagged *0.n*.
+
+There are two available images for you to choose from. The main images (0.*n*) are based on
+Debian 10-slim from tag 0.5 and up. Previous to 0.5 they were based on Ubuntu 18.04. 
+The main images uses Icinga2 from Icingas official repository. 
+
+The other images (0.*n*-alpine) are based on Alpine with Icinga2 from Alpines repository. 
+From 0.1.1-alpine and up, the Alpine images are built on the latest Alpine image. Previous to
+0.1.1 they were based on Alpine 3.11.
 
 ## Environment variables
-Everything is controlled using the follwing environment variables.
+Everything is controlled using the following environment variables.
 
 * **CN** is the Common Name of the satellite
 * **ZONE** is the zone in which this satellite should be in. If no zone is specified
@@ -60,12 +90,4 @@ services:
       - LOCAL_TIMEZONE=Europe/Stockholm
 ```
 
-## Images
 
-> **NOTE:** Currently there are some problems with the Alpine image. Use the main image
-> instead, tagged *0.n*.
-
-There are two available images for you to choose from. The default one (0.*n*) is based on
-Ubuntu 18.04, with Icinga2 from Icingas official repository. The other image (0.*n*-alpine) is
-based on Alpine 3.11, with Icinga2 from Alpines repository. From 0.1.1-alpine and up, the Alpine
-image is built on the latest Alpine. The Alpine image is much smaller in size.