Run Traefik version 2 on Docker

In this tutorial we will be setting up Traefik v2 as our reverse proxy with port 80 and 443 enabled, and then hook up a example application behind the application load balancer, and route incoiming requests via host headers. Use Case In our example we want to route traefik from http://app.mydomain.net to hit our proxy on port 80, then we want traefik to redirect port 80 to the 443 port configured on the proxy which is configured with letsencrypt and reverse proxy the connection to our application....

June 16, 2021 路 2 min 路 Ruan Bekker

Go Web Application using Docker

In this tutorial we will be building a go based application using docker and make use of multi-stage builds so that we can optimize our storage size of our image. The source code can be found on github Go Application Our go application is a simple web application that returns the hostname. This can also be a useful application if you run it with orchestrators such as Kubernetes or Docker Swarm, when using more than 1 replicas on multiple nodes, as when the application is scaled each container will respond with different hostnames....

April 23, 2021 路 2 min 路 Ruan Bekker

Run AWS Lambda Functions on Docker

In this tutorial we will demonstrate how to run local aws lambda functions with the help of docker and running it locally on a container. Dockerfile In our Dockerfile: FROMpublic.ecr.aws/lambda/python:3.8COPY lambda_function.py ${LAMBDA_TASK_ROOT}/COPY requirements.txt /opt/requirements.txtRUN pip install -r /opt/requirements.txt -t ${LAMBDA_TASK_ROOT}/CMD [ "lambda_function.handler" ]Lambda Function Our application code, residing in our lambda_function.py: import json import requests def handler(event, context): body = { "message": "this is a message", "input": event } response = { "statusCode": 200, "body": json....

April 23, 2021 路 1 min 路 Ruan Bekker

Why you should use Multi Stage Docker Builds

In this tutorial I will demonstrate how to build slim docker images using multistage docker builds, where you can save up to 800MB of disk space per image. About We will use multistage docker builds from a alpine image as our build image to get the dependencies, build the go binary and use our scratch image to place the built binary onto our target image to have small docker images....

April 21, 2021 路 3 min 路 Ruan Bekker

Run Docker Containers

In this tutorial we will demonstrate how to build a container image and how to run a docker container, as well as how to persist data and exposing host ports to reach the container ports. Assumptions I will assume that you have docker installed. Running a Container Let鈥檚 start with the basics, running a container. To run a container, we instantiate a container instance from a container image. There are thousands of container images on a container registry such as docker hub, a example that we will be working with will be the ubuntu official image....

April 5, 2021 路 8 min 路 Ruan Bekker