Piotr1215

kubectl commands and tips&tricks for CKA, CKAD and CKS exams

Quickly retrieve imperative commands to create k8s resources.

Command: k run -h | grep '# ' -A2

When is it useful: copy/paste command to notepad, edit values and execute to create desired resource

Result: list of different ways to create k8s resources imperatively using kubectl

karstengresch

• Install podman-manchine from https://github.com/boot2podman/machine/releases
• Install podman via homebrew brew cask install podman

$ export PATH=$(pwd):$PATH
$ podman-machine create box
Podman machine "box" already exists
$ podman-machine start box
Starting "box"...

alexellis

Get k3s with OpenFaaS using k3sup and multipass

multipass from Canoncial is like Docker Desktop, but for Ubuntu and works on MacOS, Linux and Windows.

Use-case:

We can get a Kubernetes cluster with k3s in a very short period of time. We can use this for workshops and building labs, and for R&D, including testing.

• Get multipass.run

bradtraversy

const express = require('express');
const fetch = require('node-fetch');
const redis = require('redis');

const PORT = process.env.PORT || 5000;
const REDIS_PORT = process.env.PORT || 6379;

const client = redis.createClient(REDIS_PORT);

const app = express();

AndrewPix

Backup:
docker exec -t -u postgres your-db-container pg_dumpall -c > dump_`date +%d-%m-%Y"_"%H_%M_%S`.sql

Restore:
cat your_dump.sql | docker exec -i your-db-container psql -Upostgres

Integralist

The following is copied verbatim from https://www.kitchensoap.com/2012/10/25/on-being-a-senior-engineer/ -- this gist is merely a partial backup of that excellent article.

For my own thoughts on the subject (which I still agree with having now read the above link) see my post called "The Perfect Developer Qualities": https://www.integralist.co.uk/posts/the-perfect-developer-qualities/

Mature engineers seek out constructive criticism of their designs.

Every successful engineer I’ve met, upon finishing up a design or getting ready for a project, will continually ask their peers questions along the lines of:

• “What could I be missing?”
• “How will this not work?”

AndrewPix

from rest_framework import serializers

from rest_auth.serializers import UserDetailsSerializer


class KnoxSerializer(serializers.Serializer):
    """
    Serializer for Knox authentication.
    """
    token = serializers.CharField()

dufferzafar

#!/usr/bin/python

from mininet.node import OVSController

from mininet.topo import SingleSwitchTopo
from mininet.net import Mininet
from mininet.log import lg
from mininet.cli import CLI

AndrewPix

import functools

from channels.handler import AsgiRequest
from rest_framework.exceptions import AuthenticationFailed
from rest_framework.settings import api_settings


authenticators = [auth() for auth in api_settings.DEFAULT_AUTHENTICATION_CLASSES]

ibrahimlawal

vi /etc/environment

add these lines...

LANG=en_US.utf-8
LC_ALL=en_US.utf-8