aojea

Networking scenarios [Linux Only]

KIND runs Kubernetes cluster in Docker, and leverages Docker networking for all the network features: port mapping, IPv6, containers connectivity, etc.

Docker Networking

KIND uses a docker user defined network.

It creates a bridge named kind

DevopsVlogger

KataContainers
- image coupled with kernel 
- light vm layer
- can run in nested virturalization environments if hardware supports and you can enable it in bios (ex. only bare metal EC2 instances, limits many cloud providers)
- slower startup time
- OCI compliant
- previously known as ClearContainers by Intel

gvisor
- kernel implemented in userspace

oofnikj

# GitLab multi-arch docker build template
# https://badgateway.qc.to/multi-architecture-docker-builds
variables:
  CI_IMAGE: $DOCKER_HUB_USER/$CI_PROJECT_NAME

before_script:
  - docker login -u $DOCKER_HUB_USER -p $DOCKER_HUB_TOKEN
  - docker run --rm --privileged multiarch/qemu-user-static --reset -p yes
  - docker buildx create --use

namtx

provider "google" {
  project = var.google_project_id
  region  = var.region
  zone    = var.az
}

resource "google_compute_instance" "k3s_master_instance" {
  name         = "k3s-master"
  machine_type = "n1-standard-1"
  tags         = ["k3s", "k3s-master", "http-server", "https-server"]

mauilion

# https://www.outcoldsolutions.com/docs/monitoring-kubernetes/v4/audit/
apiVersion: audit.k8s.io/v1
kind: Policy
rules:
# Do not log from kube-system accounts
  - level: None
    userGroups:
    - system:serviceaccounts:kube-system
  - level: None
    users:

bratorange

Using the nipkgs unstable channel

Motivation

There a times when you need to build something from the nix unstable channel. For example the master contains a new package you need, but the next nixpkgs release is somewhere in the future, and you need this package now. In this guide I want to show how to install packages from unstable by using nix-env. Furthermore I hope to give a basic understanding of the channels concept.

What are nix channels?

A channel is a set of expressions which includes severall build, installation and configuration instructions for packages, services and the system itself. The repository normaly used here is nixpkgs. It is developed at https://github.com/NixOS/nixpkgs.

What is the nix unstable channel?

The unstable channel is a copy of the NixOS/nixpkgs master. It is pulled from github once in a while and will be available from a mirror under https://nixos.org/channels/nixpkgs-unstable. Since NixOS uses half-anual released stable channels, some changes (especially new f

velotiotech

package main

import (
	"bytes"
	admissionregistrationv1 "k8s.io/api/admissionregistration/v1"
	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
	"k8s.io/client-go/kubernetes"
	"os"
	ctrl "sigs.k8s.io/controller-runtime"
)

velotiotech

package main

import (
	"bytes"
	cryptorand "crypto/rand"
	"crypto/rsa"
	"crypto/x509"
	"crypto/x509/pkix"
	"encoding/pem"
	"fmt"

weibeld

name: issue-greeter
on:
  issues:
    types: [opened]
jobs:
  my-job:
    runs-on: ubuntu-latest
    steps:
      - name: my-step
        env:

weibeld

name: hello-world
on: push
jobs:
  my-job:
    runs-on: ubuntu-latest
    steps:
      - name: my-step
        run: echo "Hello World!"