Initial commit

Dockerfile

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+FROM microsoft/dotnet:1.1.1-sdk
+
+ARG BUILDCONFIG=DEBUG
+
+# Install Cron
+RUN apt-get update -qq && apt-get -y install cron -qq --force-yes
+
+# Copy project files to avoid restoring packages if they haven't changed
+COPY . /app/.
+WORKDIR /app/
+
+# Set up schedule
+ADD schedule /etc/cron.d/schedule
+RUN chmod 0644 /etc/cron.d/schedule
+
+# Create log file
+RUN touch /var/log/cron.log
+RUN chmod 0666 /var/log/cron.log
+
+# Publish dotnet core app
+RUN dotnet restore
+RUN dotnet publish -c $BUILDCONFIG -o out
+
+# Volume required for tail command
+VOLUME /var/log
+
+# Run Cron
+CMD /usr/sbin/cron && tail -f /var/log/cron.log

Program.cs

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+using System;
+
+namespace test_dotnet
+{
+    class Program
+    {
+        static void Main(string[] args)
+        {
+            Console.WriteLine($"This program should be running on a schedule: {DateTime.Now}");
+        }
+    }
+}

README.md

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+# .Net Core console app running in a schedule in Docker
+
+This is an example project showing you how to run a console app in a schedule in a docker container.
+
+The docker image makes use of cron which is a unix utility for running commands on a schedule.
+
+The docker file attached does the following:
+1. Installs cron on the standard microsoft/dotnet:1.1.1-sdk image.
+2. Copies your application files across to the docker image.
+3. Copies the schedule file across to the docker image.
+4. Restores and Publishes your dotnet core image. 
+5. Runs cron and outputs the contents of the /var/log/cron.log file to the screen.
+
+## How to use
+To use this within your own dotnet core console app you will need the Dockerfile, schedule file dockerignore file and docker-compose.yml (if you are not using your own).
+
+You need to modify the schedule file to reference the dll of your console app. 
+
+Then run:
+
+`docker-compose up`

docker-compose.yml

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+version: "3"
+
+services:
+  console:
+    build: .
+    container_name: recurring-console

dotnet-cron.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <OutputType>Exe</OutputType>
+    <TargetFramework>netcoreapp1.1</TargetFramework>
+  </PropertyGroup>
+
+</Project>

schedule

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+* * * * * root dotnet /app/out/dotnet-cron.dll >> /var/log/cron.log 2>&1
+
+#* * * * * *
+#| | | | | | 
+#| | | | | +-- Year              (range: 1900-3000)
+#| | | | +---- Day of the Week   (range: 1-7, 1 standing for Monday)
+#| | | +------ Month of the Year (range: 1-12)
+#| | +-------- Day of the Month  (range: 1-31)
+#| +---------- Hour              (range: 0-23)
+#+------------ Minute            (range: 0-59)
+# Cron requires a blank space at the end of the file so leave this here.