toddams

kind: Service
apiVersion: v1
metadata:
  name: nginx-default-backend
  namespace: kube-system
  labels:
    k8s-addon: ingress-nginx.addons.k8s.io
spec:
  ports:
  - port: 80

toddams

Kubernetes + HAProxy sticky session affinity

1. Make sure you have balance source in haproxy.
2. Backend server section in haproxy config should have all your k8s nodes.
3. sessionAffinity in k8s is irrelevant.
4. Exposed k8s service need to have nodePort set and this annotation:

kubectl annotate service myService service.beta.kubernetes.io/external-traffic=OnlyLocal

This will cause internal k8s loadbalancer on nodeⁿ to route traffic only to pod on nodeⁿ. From Haproxy point of view it will look like nodeⁿ:nodePort === pod on nodeⁿ:port thus disabling k8s LB completly.

toddams

# Join multiple lines without new line
value: >
        part 1
        part 2
        
# Join with newline
value2: |
        line 1
        line 2

toddams

Creating Neat .NET Core Command Line Apps

Every reason to get more HackerPoints™ is a good one, so today we're going to write a neat command line app in .NET Core! The Common library has a really cool package Microsoft.Extensions.CommandlineUtils to help us parse command line arguments and structure our app, but sadly it's undocumented.

No more! In this guide, we'll explore the package and write a really neat console app. We'll get good practices, a help system and argument parsing for free. Oh, it also involves ninjas. Insta-win.

toddams

#!/usr/bin/env bash
# https://developers.supportbee.com/blog/setting-up-cucumber-to-run-with-Chrome-on-Linux/
# https://gist.github.com/curtismcmullan/7be1a8c1c841a9d8db2c
# http://stackoverflow.com/questions/10792403/how-do-i-get-chrome-working-with-selenium-using-php-webdriver
# http://stackoverflow.com/questions/26133486/how-to-specify-binary-path-for-remote-chromedriver-in-codeception
# http://stackoverflow.com/questions/40262682/how-to-run-selenium-3-x-with-chrome-driver-through-terminal
# http://askubuntu.com/questions/760085/how-do-you-install-google-chrome-on-ubuntu-16-04

# Remove existing downloads and binaries so we can start from scratch.
rm ~/google-chrome-stable_current_amd64.deb

toddams

public class StringContentRazorProject : RazorLightProject
{
    public StringContentRazorProject(Func<string, Stream> getContentFunc, Func<string, bool> existsCheckFunc)
    {
        this.GetContentFunc = getContentFunc;
        this.ExistsCheckFunc = existsCheckFunc;
    }

    public Func<string, Stream> GetContentFunc { get; }
    public Func<string, bool> ExistsCheckFunc { get; }