Studies

Service Mesh

• Magalix Blog: What Is A Service Mesh? - Mar 10, 2020

• [FR] Metanext > Service Mesh sur Kubernetes - May 30, 2020

• Platform9 Blog > Kubernetes Service Mesh: A Comparison of Istio, Linkerd and Consul - October 21, 2019

→ circleci.com

Lightweight Container Runtime for Kubernetes

→ cri-o.io, GitHub

MetalLB is a load-balancer implementation for bare metal Kubernetes clusters, using standard routing protocols.

→ metallb.org, source

Examples

• Ingresses and Load Balancers in Kubernetes with MetalLB and nginx-ingress by Adatlas - September 8, 2022

The world’s most popular API gateway. Built for hybrid and multi-cloud, optimized for microservices and distributed architectures.

→

Learn

• - September 23, 2021

→ ,

Test and Deploy with Confidence. Easily sync your GitHub projects with Travis CI and you’ll be testing your code in minutes!

→

Learn

Travis CI build config processing:

Follow

Experiment

.NET code

The solution to share your best practices between developers

→

Getting help

Getting started

On-premises installation

Create with freedom. Release with confidence.

Feature management lets you turn new features on/off in production with no need for redeployment. A software development best practice for releasing and validating new features.

→ ,

Learn

→

MongoDB.local London 2019

• "Streaming Data on the Shoulders of Giants"

MongoDB World 2017

An industry-standard container runtime with an emphasis on simplicity, robustness and portability

→

Recipes

Migrate from Docker

• - April 01, 2021

• - March 16, 2021

Learn

• - November 8, 2021

• - October 29, 2021

→ ,

WPF & .NET Core

Learn

Cheat sheets

• Cypress

• Selenium

Tools

Katalon

An all-in-one test automation solution.

→ katalon.com

Pupeteer

Puppeteer is a Node library which provides a high-level API to control Chrome or Chromium over the DevTools Protocol. Puppeteer runs headless by default, but can be configured to run full (non-headless) Chrome or Chromium.

→ pptr.dev, GitHub

Locust

An open source load testing tool. Define user behaviour with Python code, and swarm your system with millions of simultaneous users.

→ locust.io, GitHub, docs

Declarative continuous delivery with a fully-loaded UI

→ website, docs, sources

Versions

2.6

• What's New in Argo CD 2.6 | StruggleOps Stream Highlights - February 7, 2023

Articles

• Unveil the Secret Ingredients of Continuous Delivery at Enterprise Scale with Argo CD - Dec 3, 2021

Dapr helps developers build event-driven, resilient distributed applications. Whether on-premises, in the cloud, or on an edge device, Dapr helps you tackle the challenges that come with building microservices and keeps your code platform agnostic.

→ dapr.io

Annoucements

• Dapr joins CNCF Incubator - November 3, 2021

Envoy is an open source edge and service proxy, designed for cloud-native applications

→ envoyproxy.io, GitHub

Learn

• envoyproxy.io/docs

• Kong: Service Mesh 101: The Role of Envoy - August 26, 2021

Redis is an open source (BSD licensed), in-memory data structure store, used as a database, cache, and message broker

→ redis.io

Recipes

• Redis, STunnel, and C#

→ evergreen-ci/evergreen, evergreen.mongodb.com

Learn

• Testing Linearizability with Jepsen and Evergreen: “Call Me Continuously!” - February 16, 2017

• Evergreen Continuous Integration: Why We Reinvented The Wheel - July 27, 2016

• How We Test MongoDB: Evergreen - June 1, 2015

Identity for the Internet. Okta is one trusted platform to secure every identity.

→ okta.com

Learn

→ developer.okta.com

Concept

• Understanding gRPC Concepts, Use Cases & Best Practices - January 02, 2023

Implementations

gRPC with .NET

• gRPC Web with .NET - December 10, 2020

Fluentd is an open source data collector for unified logging layer. (It) allows you to unify data collection and consumption for a better use and understanding of data.

→ fluentd.org, GitHub

Learn

Documentation

• List of Data Sources

Arcticles

• CNCF Tools Overview: Fluentd – Unified Logging Layer - Feb 26, 2020

Documentation

• Unit Testing in .NET Core and .NET Standard

Online payment processing for internet businesses.

Stripe is a suite of payment APIs that powers commerce for online businesses of all sizes, including fraud prevention, and subscription management. Use Stripe's payment platform to accept and process payments online for easy-to-use commerce solutions.

→ stripe.com

Tuleap is an ALM (Application Lifecycle Management) tool, it is open source solution provided by enalean.

Links

• tuleap.org

• docs.tuleap.org

• github.com/Enalean/tuleap

Features

→ Learn Kubernetes

Components

Source: kubernetes.io

Concept

Definitions

Quickstart

Tools

Azure DevOps, previously known as VSTS (Visual Studio Team Services), is the application lifecycle platform provided by Microsoft.

Quick links

Learn

Features

• Wiki

• Azure Boards

• Azure Repositories (git)

• : Build & Release

• Azure Tests

• Artifacts

Tips

Testing

Integration

Wiki

• Use [[_TOC_]] to have an automatically generated table of content (more information on )

Administrate

Extensions

Automate, customize, and execute your software development workflows right in your repository with GitHub Actions. You can discover, create, and share actions to perform any job you'd like, including CI/CD, and combine actions in a completely customized workflow.

→

Getting started

Annoucements

• - August 8, 2019

Action catalog

.NET actions

Git actions

GitHub actions

Helms actions

• • Single responsibility principle

  • Interface segregation principle

  • Dependency inversion principle

• : Object Oriented Design

• : Don't Repeat Yourself

• : Keep It Simple Stupid

• : You Aren't Gonna Need It

→

Usecases

Monorepo

MongoDB Atlas is an integrated suite of data services centered around a cloud database designed to accelerate and simplify how you build with data.

→ , , ,

Features

• - September 26, 2019

• Cloud providers: Amazon Web Services, Google Cloud Platform, Microsoft Azure

Getting started

• - November 22, 2022

An open model for defining cloud native apps.

→

Learn

• - October 16, 2019

• is a "A Kubernetes implementation of the Open Application Model specification".

The easiest way to explore and manipulate your MongoDB data

The GUI for MongoDB. Visually explore your data. Run ad hoc queries in seconds. Interact with your data with full CRUD functionality. View and optimize your query performance. Available on Linux, Mac, or Windows. Compass empowers you to make smarter decisions about indexing, document validation, and more.

→ ,

Quickstart

→

Installation

• Navigate to , review and set the version and platform, then click "Download" to start the download.

• For Windows, you'll have a file with a name like "mongodb-compass-1.16.3-win32-x64.exe", you just have to execute the exe file.

Extending

2020

2019

.NET Conf 2019

,

>

Talks:

Cloud-native application life-cycle orchestration

→ ,

Learn

• - June 17, 2019

Usecases

• - June 11, 2021

A spec for packaging distributed apps. CNABs facilitate the bundling, installing and managing of container-native apps — and their coupled services.

→

New

• - Feb 12, 2020

Built by MongoDB engineers, Ops Manager is the management platform that makes it easy to deploy, monitor, back up, and scale MongoDB on your own infrastructure.

→

Introduction

Ops Manager is an incredible tool provided by MongoDB. You need to get a licence to use it in Production but the benefits clearly worth it.

You can see it as a dashboard opened to anyone inside your organization, where you can completely manage and automate your MongoDB instances, replica and sharding sets as well as giving many live insights about the usage and the data.

Learn

Recipes

Cluster API is a Kubernetes sub-project focused on providing declarative APIs and tooling to simplify provisioning, upgrading, and operating multiple Kubernetes clusters.

→

Providers

Microsoft Azure

• - December 15, 2020

VMware vSphere

Flux is a set of continuous and progressive delivery solutions for Kubernetes that are open and extensible.

→

News

• - October 29, 2021

Additional content

Node Package Manager

→

Installation

→

CLI

Basic commands

Registries

Recipes

Update packages

• Install and use

Working with MyGet

• Read the documentation about

• Add another registry on MyGet: npm config set @mycompany:registry https://www.myget.org/F/mycompany/npm/

  • npm install @mycopmpany/[email protected]

• Or add directly the zip url:

→

Shortcuts

Features

Tools

Recipes

A message broker () is a component that is part of an IT infrastructure whose primarly goal is to receive messages and make them available to other components.

It is a way to decouple applications inside an information system and provide high performance.

Noticeable technologies

• Apache Kafka goal is building real-time data pipeline and streaming apps

• is a multi-tenant cloud messaging service handling asynchronous operations

• is an open source message broker, whose commercial version is managed by Pivotal Software

Studies

• 2014-06-03

• 2017-04-26

• Fr 2018-03-27

One codebase. Any platform. Now in Vue, Angular, React.

An open source mobile UI toolkit for building high quality, cross-platform native and web app experiences. Move faster with a single code base, running everywhere with JavaScript and the Web.

→ ,

Ionic in Angular

Setup

npm i ionic-angular

Quick start

Changes

• - December 16th, 2020

• - September 1st, 2020

• - August 31st, 2020

• - August 31st, 2020

Annoucements

• - May 6, 2020

• - Mar 16, 2020

  • - Mar 16, 2020

Features

Source Generators

• - April 29, 2020

Node.js is a JavaScript runtime built on Chrome's V8 JavaScript engine.

→

Learn

Getting started

kind is a tool for running local Kubernetes clusters using Docker container “nodes”. kind was primarily designed for testing Kubernetes itself, but may be used for local development or CI.

→ kind.sigs.k8s.io, GitHub

CLI

# makes sure kind is available from the command line
kind version

# creates a cluster
kind create cluster

# gets clusters
kind get clusters

# sets kubectl context
kubectl cluster-info --context kind-kind

# looks at images
docker exec -it my-node-name crictl images

# builds an image
docker build -t my-custom-image:unique-tag ./my-image-dir
kind load docker-image my-custom-image:unique-tag
kubectl apply -f my-manifest-using-my-image:unique-tag

# deletes a cluster
kind delete cluster

Use cases

WSL2

• Follow Using WSL2

• Create the cluster config file

# cluster-config.yml
kind: Cluster
apiVersion: kind.x-k8s.io/v1alpha4
nodes:
- role: control-plane
  extraPortMappings:
  - containerPort: 30000
    hostPort: 30000
    protocol: TCP

• Workaround on Ubuntu 20.04 to fix the error while creating the cluster (see issue #2323)

kind create cluster --config=cluster-config.yml --image kindest/node:v1.17.17

NGINX Ingress Controller

• LoadBalancer Services using Kubernetes in Docker by Owain Williams

• September 20, 2022

Kubernetes-native workflow engine supporting DAG and step-based workflows

→ website, docs sources

Versions

3.0

• Blog > Argo Workflows 3.0 Released!

• CNCF On-Demand Webinar: Argo Workflows 3.0, a detailed look at what’s new from the Argo Team

Articles

• OpenShift Blog > Creating an Argo Workflow With Vault Integration Using Helm - February 17, 2021

→ postgresql.org

Getting Started

Local installation

Docker

GitHub

# Alpine
docker run --name postgres -p 5432:5432 -e POSTGRES_PASSWORD=mysecretpassword -d postgres:alpine
# Official
docker run --name postgres966 -p 5432:5432 -e POSTGRES_PASSWORD=mysecretpassword -d postgres:9.6.6

Tools

pgAdmin

pgAdmin 3

• With Docker (see hub.docker.com)

docker pull dpage/pgadmin4
docker run -p 80:80 -e "[email protected]" -e "PGADMIN_DEFAULT_PASSWORD=SuperSecret" --name pgadmin4 -d dpage/pgadmin4
# open http://localhost and login

Recipes

Backup / restore

• Backup can be done with pgAdmin (personally I prefer plain format to have human readble sql content)

• Restore can be done with Docker: cat D:\Temp\dump.sql | docker exec -i postgres966 psql -U postgres (you may have to add the missing roles entries, which are not exported such as CREATE ROLE mycompany SUPERUSER;)

Queries

SQL

Update a user password

ALTER USER user WITH PASSWORD 'newpassword';

Get all databases

SELECT * FROM pg_catalog.pg_database;

Get all tables

SELECT
    table_schema || '.' || table_name
FROM
    information_schema.tables
WHERE
    table_type = 'BASE TABLE'
AND
    table_schema NOT IN ('pg_catalog', 'information_schema');

SELECT * FROM pg_catalog.pg_tables WHERE schemaname = 'gracethd';

Get all columns of a table

SELECT *
FROM information_schema.columns
WHERE table_schema = 'gracethd'
  AND table_name   = 'adresse';

New features

• Guide to What’s New

• Performance Boosts

• Going in

Key highlights

• Distributed Transactions extending MongoDB’s multi-document ACID guarantees from replica sets to sharded clusters, enabling you to serve an ever broader range of use cases.

  • Video

• On-Demand Materialized Views using the new $merge operator. Caching the output of a large aggregation in a collection is a common pattern, and the new $merge operator lets you update those results efficiently instead of completely recalculating them.

  • Blog article

• Wildcard Indexes make it easy and natural to model highly heterogeneous collections like product catalogs, without sacrificing great index support. You simply define a filter that automatically indexes all matching fields, sub-documents, and arrays in a collection.

  • Video

• MongoDB Query Language enhancements such as more expressive updates, new math operators, and expanded regex support. update and findAndModify commands can now reference existing fields, and incorporate aggregation pipelines for even more expressivity.

  • Blog article

• Retryable Reads and Writes, reducing the complexity of writing code that handles transient cluster failures.

Presentations

• What`s new in MongoDB 4.2 (slides) - August 13, 2019

Annoucements

• MongoDB 4.2 is now GA: Ready for your Production Apps - August 13, 2019

Quick links

• Introduction to logging in ASP.NET Core

• Experiments on GitHub: devpro/dotnetcore-logging

Tips

• For a netstandard library

  • Add Microsoft.Extensions.Logging to the project (do not add a strong dependency to a logging framework such as log4net or NLog!).

    Copy

    <Project Sdk="Microsoft.NET.Sdk">
      <PropertyGroup>
        <TargetFramework>netcoreapp2.0</TargetFramework>
      </PropertyGroup>
      <ItemGroup>
        <PackageReference Include="Microsoft.Extensions.Logging" Version="2.0.0" />
      </ItemGroup>
      <!-- ... -->
    </Project>

  • Add ILogger dependency (IoC) to the class constructor and the related private field

    Copy

    using Microsoft.Extensions.Logging;
    // ...
    
    public class MyClass
    {
        private readonly ILogger _logger;
    
        public MyClass(ILogger<PuppetFacterService> logger)
        {
            _logger = logger;
        }
    
        public MyMethod()
        {
            _logger.LogInformation("MyMethod called");
        }
    }

Frameworks

Serilog

Homepage: serilog.net

Usecases

Logging in Redis

• Possible with Serilog

• NLog.Redis not yet available for .NET Core (as of the 10th of May 2018).

New features and improvements

Versioned API

• A Versioned API, designed to preserve application behavior through upgrades

• Upgrade Fearlessly with the MongoDB Versioned API - June 1st, 2021

Time Series

• Native time series collections and clustered indexing

• MongoDB Time Series Data

• Paginations 1.0: Time Series Collections in five minutes - October 21, 2021

• Currency Analysis with Time Series Collections #2 — Simple Moving Average and Exponential Moving Average Calculation - August 27, 2021

• Archive Data

• How to Use Custom Archival Rules and Partitioning on MongoDB Atlas Online Archive - July 12, 2021

Window functions

• Window functions and new temporal operators

Resharding

• Reshard a Collection

Fast, unopinionated, minimalist web framework for Node.js

→ expressjs.com, GitHub

Learn

• Mozilla Express/Node introduction

Express & MongoDB

• Building a Simple CRUD Application with Express and MongoDB

• Quick Start

Getting started

Express Generator

Express application generator

Local checkout

npm install express-generator
node_modules\express-generator\bin\express-cli.js -h
node_modules\express-generator\bin\express-cli.js myapp

Presentations

• The Six Principles For Resilient Evolvability - November, 2020

Enterprise-grade Serverless on your own terms. Kubernetes-based platform to deploy and manage modern serverless workloads.

→ knative.dev, github.com/knative

Learn

• What is Knative? - January 8, 2019

Versions

Recipes

• Distributed tracing with Knative, OpenTelemetry and Jaeger - August 20, 2021

→ cli.angular.io, GitHub

Releases

Setup

# install the CLI globally
npm install -g @angular/cli

Cheat sheet

Recipes

Migrate from Protractor to Cypress

• ninja squad

Migrate from TSLint to ESLint

• ninja squad

Learn

Readings

Key elements

• Computer network types

  • Local Area Network (LAN)

  • Storage Area Network (SAN)

  • Virtual Private Network (VPN)

  • Wide Area Network (WAN)

  • Wireless Local Area Network (WLAN)

• Classless Inter-Domain Routing (CIDR)

• Content Delivery Network (CDN)

• Distributed Denial of Service (DDoS)

• Domain Name System (DNS)

• Gateway

• Firewall

• Quality of Service (QoS)

• Load balancers

• Network Address Translation (NAT)

• Network topologies

  • Bus

  • Ring

  • Star

  • Mesh

  • Tree

• Open Systems Interconnection (OSI) model

  • (1) Physical Layer

  • (2) Data Link Layer

  • (3) Network Layer

  • (4) Transport Layer

  • (5) Session Layer

  • (6) Presentation Layer

  • (7) Application Layer

  →

• TCP/IP

  • Internet Protocol (IP) addresses

  • Transmission Control Protocol (TCP) and User Datagram Protocol (UDP) ports

Foundations

LF (Linux Foundation) Networking

→

LF Networking Projects

• ...

Big picture

Source:

Definitions

What is a container?

A container is a standard unit of software that packages up code and all its dependencies so the application runs quickly and reliably from one computing environment to another. A Docker container image is a lightweight, standalone, executable package of software that includes everything needed to run an application: code, runtime, system tools, system libraries and settings.

→

See also

What is Containerization?

Containerization is the packaging together of software code with all it’s necessary components like libraries, frameworks, and other dependencies so that they are isolated in their own “container”.

→

Components

Container runtimes

See also

Container registries

Container GUI

• Rancher Desktop

Readings

• - October 28, 2021

AngularConnect 2019

- London, UK - 19 & 20 September -

Excellent summary:

Videos:

Talks:

• "How to make Angular Fast" & & by

• "How Angular Works" by

• "Quantum facades" by

• "Building Angular apps with internationalization (i18n) in mind | Naomi Meyer"

• by

  • Our collaboration with standard committees, Chrome, and Bazel

  • Automating DX for faster Web

  • Intelligent tooling

  • Enabling best practices

  • ng deploy

Workshops:

→

How to run locally

Requirements

• Install [Ruby]

  • On Windows, download the latest version with DevKit from the and execute it, agree to run ridk install at the end

• Install jekyll gem

  • Run gem install bundler jekyll

Local server

Open the terminal at the root folder and run bundle exec jekyll serve

How to contribute

Creation

This code base was made by using the command: jekyll new my-website

How to run with Docker

See

→ azure.microsoft.com/services/devops/pipelines

Quick links

• Documentation

Learn

Latest features

• Caching and faster artifacts in Azure Pipelines - July 24, 2019

• New IP firewall rules for Azure DevOps Services - May 31, 2019

Agents

• Microsoft-hosted agents (public IP ranges)

Definition

• YAML schema reference

• Classic Editor VS. YAML

Templates

Template types & usage

Variables

Define variables

Examples

Example of pipelines in MicrosoftDocs GitHub repositories.

.NET Blog article on How the .NET Team uses Azure Pipelines to produce Docker Images

Tutorials

• Tutorial: Immutable infrastructure for Azure, using VSTS, Terraform, Packer and Ansible May 23, 2018

Recipes

Code coverage

• Generate Code Coverage Reports with ReportGenerator in Azure DevOps - July 17, 2019

• Uploading to Codecov just got easier - November 13, 2019

Permissions

By default, it won't work for Artifacts, you need to click on "..." in the permission pane of your feed and click on "Allow project-scoped builds".

Secure and share packages using feed permissions

Yaml

Publish to NuGet feeds

- task: NuGetAuthenticate@0
  displayName: 'Authenticate to NuGet feed'
- task: NuGetCommand@2
  displayName: 'Push NuGet packages'
  inputs:
    command: 'push'
    packagesToPush: '$(Build.ArtifactStagingDirectory)/**/*.nupkg;!$(Build.ArtifactStagingDirectory)/**/*.symbols.nupkg'
    nuGetFeedType: 'internal'
    publishVstsFeed: $(azure.artifact.feed.id)
    allowPackageConflicts: true

Models

• 12 factors (Pivotal article)

  1. Codebase

  2. Dependencies

  3. Config

  4. Backing services

  5. Build, release, run

  6. Processes

  7. Port binding

  8. Concurrency

  9. Disposability

  10. Dev/prod parity

  11. Logs

  12. Admin processes

• aim42

  aim42 is the systematic approach to improve software systems and architectures

• C4 model

  The C4 model for visualising software architecture: Context, Containers, Components and Code

• Extreme programming

  • [Spike](https://en.wikipedia.org/wiki/Spike_(software_development))

    A spike is a product-testing method (...) that uses the simplest possible program to explore potential solutions. It is used to determine how much work will be required to solve or work around a software issue. Typically, a 'spike test' involves gathering additional information or testing for easily reproduced edge cases. The term is used in agile software development approaches like Scrum or Extreme Programming.

Processes

• Event storming

  • "Event Storming technique for decomposing monoliths. Games are not just for kids" by Rohit Kelapure

• TDD (Test Driven Development)

• ITIL

  • ITIL 4: An A – Z Guide By Joe the IT Guy - Mar 21, 2019

Deployments

• Canary release

  • Martin Fowler website article - June 25, 2014

  • Lessons learned and best practices from Google and Waze - January 14, 2019

Testing

• A/B testing

  • wikipedia

Helm 3: The package manager for Kubernetes. It is the best way to find, share, and use software built for Kubernetes.

helm.sh: code, docs

Quick start

Installation

Start with the installation guide.

On Windows, get the zip file from the Release page and extract the exe file to a folder defined in the PATH environment variable.

Make sure helm is available from the command line: helm version.

Update repository

Then follow the quickstart guide.

Add at least one repository (helm repo ls), for instance helm repo add stable https://charts.helm.sh/stable.

Run helm repo update to update the repository.

You can look at what is available with helm search repo stable.

First try with MySQL

Install the first chart with helm install stable/mysql --generate-name.

The ouput of this command is very interesting:

MySQL can be accessed via port 3306 on the following DNS name from within your cluster: mysql-xxxxxxx.default.svc.cluster.local

To get your root password run: MYSQL_ROOT_PASSWORD=$(kubectl get secret --namespace default mysql-xxxxxxx -o jsonpath="{.data.mysql-root-password}" | base64 --decode; echo)

To connect to your database:

1. Run an Ubuntu pod that you can use as a client: kubectl run -i --tty ubuntu --image=ubuntu:18.04 --restart=Never -- bash -il

2. Install the mysql client: $ apt-get update && apt-get install mysql-client -y

3. Connect using the mysql cli, then provide your password: $ mysql -h mysql-xxxxxxx -p

   To connect to your database directly from outside the K8s cluster: MYSQL_HOST=127.0.0.1, MYSQL_PORT=3306. Execute the following command to route the connection: kubectl port-forward svc/mysql-xxxxxxx 3306 and mysql -h ${MYSQL_HOST} -P${MYSQL_PORT} -u root -p${MYSQL_ROOT_PASSWORD}.

As usual, look at the progress with kubectl get pods ("STATUS" column).

At the end, clean your cluster helm uninstall mysql-xxxxxxx.

Charts

Chart structure

mychart ├── Chart.yaml ├── templates │ ├── deployment.yaml │ └── service.yaml └── values.yaml

CLI reference

A distributed, reliable key-value store for the most critical data of a distributed system

Reference: , , ,

Quick start

Installation

Several options:

• Grab a pre-built binary from the

• Build from the source (written in Go)

• Docker (review latest version from )

CLI

Learning

Recipes

Backup & restore

Local Kubernetes, focused on application development & education

,

Quick start

Installation

Follow the instructions given in the .

More information on .

Make sure Docker Desktop has allocated at least 3 Go of RAM.

Run/stop

Important: If you're on Windows, open a command window as admin.

Run:

• (Optional) minikube config set vm-driver hyperv to set the default driver (here )

• minikube start to start the Kubernetes node

• minikube status to get the overall status

• minikube pause to pause it

• minikube stop to stop it

Dashboard

Run minikube dashboard to open the web dashboard.

Kubernetes CLI

Run kubectl config use-context minikube to be able to use kubectl on your local Kubernetes instance.

CLI reference

Clean-up

Run minikube delete and, if needed, delete the .kube and .minikube folder in your home directory.

Extensions

Known issues

• Incorrect date (can lead to errors with Docker pull)

• SpringFramework Guru - Gang of Four Design Patterns

Cloud Patterns

→ Cloud Design Patterns

Bulkhead

• docs.microsoft.com

Choreography

- docs.microsoft.com

Command and Query Responsibility Segregation (CQRS)

• docs.microsoft.com

• Exploring CQRS within the Brighter .NET open source project

• Example Code - Opinionated ContosoUniversity on ASP.NET Core 2.0's Razor Pages

Event sourcing

• docs.microsoft.com

Saga

• docs.particular.net/nservicebus

Strangler

• docs.microsoft.com

Software Design Patterns

→ Software design pattern

Inversion of control & dependency injection

• Martin Fowler website page - January 23, 2004

Microservice

Microservices are small, modular, and independently deployable services. Docker containers (for Linux and Windows) simplify deployment and testing by bundling a service and its dependencies into a single unit, which is then run in an isolated environment.

source (GitHub)

Articles:

• Design a microservice-oriented application

DDD (Domain Driven Design)

Read:

• Definition on wikipedia

• Starting point with Tackle Business Complexity in a Microservice with DDD and CQRS Patterns

Code examples:

• citerus/dddsample-core

• kgrzybek/modular-monolith-with-ddd

Hexagonal Architecture

• Netflix Technology Blog

• [Wikipedia](https://en.wikipedia.org/wiki/Hexagonal_architecture_(software))

• fideloper.com

If you're French, you can look at this article from Octo.

Feature flags

Feature flags are a great way to do continuous delivery with the latest source code and activate when needed new functionalities. But there is a cost that is described in an article from opensource.

Communication

Two standards are recommended:

• REST

• gRPC

As of 2019, REST is still more widely used but gRPC contains great improvements and will be used more and more for new microservices.

You can easily find comparison between REST and gRPC on the internet, for example code.tutsplus.com. There is an interesting summary on docs.microsoft.com.

Active Record Patterns

• Martin Fowler

• Wikipedia

Autentication

• Refresh tokens: auth0.com

Table Data Gateway

• Martin Fowler

Row Data Gateway

• Martin Fowler

k3d is a lightweight wrapper to run k3s (Rancher Lab’s minimal Kubernetes distribution) in docker.

→ k3d.io, docs, code

Installation

• Download & install latest release (ref. k3d.io)

# runs installation script
wget -q -O - https://raw.githubusercontent.com/k3d-io/k3d/main/install.sh | bash

Basic commands

Getting started

• Create a cluster

# creates a cluster
k3d cluster create mycluster -p "8081:80@loadbalancer" -p "8082:443@loadbalancer" --agents 2

# displays cluster information (kubectl configuration is automatically updated and set to use the new cluster context)
kubectl cluster-info

# ensures coredns and traefik (ingress controller) are deployed by default (k3s behavior)
kubectl get deploy -n kube-system

# (optional) writes and uses specific kubectl configuration
export KUBECONFIG="$(k3d kubeconfig write mycluster)"

• Deploy a basic workflow (ref. k3d Guides > Exposing Services)

# creates a nginx (web server) deployment
kubectl create deployment nginx --image=nginx

# exposes the deployment with a service
kubectl create service clusterip nginx --tcp=80:80

# provides an ingress to the service
cat <<EOF | kubectl apply -f -
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: nginx
  annotations:
    ingress.kubernetes.io/ssl-redirect: "false"
spec:
  rules:
    - host: nginx.dev.local
      http:
        paths:
          - path: /
            pathType: Prefix
            backend:
              service:
                name: nginx
                port:
                  number: 80
EOF

# checks everything is ok
kubectl get svc,pod,deploy,ingress

# makes sure the website can be reached
curl localhost:8081/

• Update hosts file

127.0.0.1  nginx.dev.local

• Make sure ingress is working

curl nginx.dev.local:8081/

• Clean-up

# deletes the cluster
k3d cluster delete mycluster

Advanced usage

• Kubernetes - K3D with Load Balancer

• CoreDNS configuration

# displays coredns configmap
kubectl -n kube-system get configmap coredns -o yaml

Use the power of .NET and C# to build full stack web apps without writing a line of JavaScript.

→ dotnet.microsoft.com/apps/aspnet/web-apps/blazor

Learn

Getting started

• Documentation

• Tutorials

• Blazor workshop

Fundamentals

• Configuration

• Debug

• State management

• Security

Additional readings

• Integrating Blazor Components into Existing Asp.Net Core MVC Applications - Jan 7, 2020

• Blazor Server in .NET Core 3.0 scenarios and performance - Oct 10, 2019

Samples

• dotnet/blazor-samples

• learn.microsoft.com/samples

• AdrienTorris/awesome-blazor

• davidfowl/TodoApi

• iammukeshm/Blazor.Learner

• Naveen512/Blazor-webassembly-authentication-scratch

Command line

# create a new Blazor Server App project
dotnet new blazorserver -o <project-name>

# create a new Blazor WebAssembly App project
dotnet new blazorwasm -o <project-name>

# create a new Razor component
dotnet new razorcomponent -n <component-name> -o <folder>

# create a new Razor page
dotnet new page -n <page-name> -o <folder>

Tips

Local debug

• dotnet watch

Recipes

Authentication

• ASP.NET Core Blazor authentication and authorization

  • Secure ASP.NET Core Blazor WebAssembly

• Blazor Google Auth Sample

• Authentication and Authorization by Steve Sanderson

• StackOverflow #59909081 about page reload

Local storage

• blazored/LocalStorage

Events

The .NET command-line interface (CLI) is a cross-platform toolchain for developing, building, running, and publishing .NET applications. The .NET CLI is included with the .NET SDK.

→ ,

Content

General commands

New command

Examples:

• dotnet new webapi --output src/PalTracker --name PalTracker will use the template "ASP.NET Core Web API"

• dotnet new xunit --output test/PalTrackerTests --name PalTrackerTestswill use the template "xUnit Test Project"

• dotnet new sln --name PalTracker will use the template "Solution File"

Add command

Examples:

• dotnet add test/PalTrackerTests reference src/PalTracker/PalTracker.csproj

• dotnet add test/PalTrackerTests package Microsoft.AspNetCore.TestHost --version 2.2.0

Solution command

Examples:

• dotnet sln PalTracker.sln add src/PalTracker/PalTracker.csproj

Run command

Examples:

• dotnet run --project src/PalTracker

Publish command

Examples:

• dotnet publish src/PalTracker --configuration Release

Test command

Examples:

• dotnet test test/PalTrackerTests --filter PalTrackerTests.InMemoryTimeEntryRepositoryTest

See also:

Tools

One framework. Mobile & desktop.

→ angular.io, API

History

Angular has replaced AngularJS (aka Angular v1).

Releases

Learn

Training

• Ninja Squad

Resources

• Become a ninja with Angular - Pro Pack

Books

• Become a ninja with Angular - Ebook

Tutorials

• github.com/devpro/dojo-angular-beginner

• web.dev

Libraries

• NgRx: ngrx.io, Documentation

Tools

• Visual Studio Code

  • Using Angular in Visual Studio Code

Quick start

• Use Angular CLI

# create the application
ng new

# launch locally (open http://localhost:4200)
ng serve --open

# add material theme
ng add @angular/material

# create the first module
ng generate module layout

# create the home page component
ng generate component layout/home

→ angular.io/guide/quickstart

Recipes

Authentication

• oktadeveloper/okta-angular-mongodb-hangman-example

CI CD

Sonar

• Create a sonar-project.properties file at the root folder of the application

sonar.host.url=https://sonarcloud.io
sonar.login=<token>
sonar.organization=<company>
sonar.projectKey=<projetKey>
sonar.projectName=<projectName>
sonar.projectVersion=1.0
sonar.sourceEncoding=UTF-8
sonar.sources=src
sonar.exclusions=**/node_modules/**,**/*.spec.ts,**/coverage/**,**/bin/**,**/obj/**
#sonar.tests=test
sonar.test.inclusions=**/*.spec.ts
sonar.typescript.lcov.reportPaths=src/WebApp/ClientApp/coverage/lcov.info
#sonar.dotnet.visualstudio.solution.file=Solution.Name.sln

• Edit package.json file

{{< highlight json >}} "scripts": { "sonar": "node_modules/sonar-scanner/bin/sonar-scanner.bat" }, "dependencies": { "sonar-scanner": "^3.1.0", "tslint-sonarts": "^1.8.0", } {{< /highlight >}}

Update

• Follow the procedure given at update.angular.io

Web design

Material design

• Material Design components for Angular

DataTables

• Option 1: Angular Datatable

  • Getting started

• Historique de la recherche :

  • Angular 5 and jQuery DataTables !

  • 10 Best Angular DataTables

materialize-css

• Home site: materializecss.com

• Integration in an Angular project:

  • Clean and ok: How to use materialize-css with angular

  • Didn't work: How to use MaterializeCSS in Angular 2

  • Didn't also work: stanleyeosakul/angular-travelville

  • Didn't try: sherweb/ngx-materialize

Documentation

Local configuration

~/.kube/config is the local configuration file (contains all the contexts, information about the clusters and user credentials)

Cluster information

Management

Objects

Namespaces (ns)

Pods

ServiceAccounts

Definitions

CustomResourceDefinition

RBAC

ClusterRole

ClusterRoleBinding

Role

RoleBinding

MutatingWebhookConfiguration

ValidatingWebhookConfiguration

Secrets

CronJobs (cj)

ConfigMap

Deployments

Services

Events

Ingress

Actions

Scale

Port forwarding

Proxy

Service provider

Azure Kubernetes Service (AKS)

Google Kubernetes Engine (GKE)

Recipes

Quick fixes

Known issues

Clean and simple cheat sheets to ease everyday work.

Introduction

This reposiory gathers notes taken over the years, in Markdown format, in a Wiki/Knowledge base spirit. You're more than welcome to contribute (fork > branch > pull request)!

The online version is available at everyday-cheatsheets.docs.devpro.fr.

Topics

• Architecture

  • API Management

  • Automation Pipelines

  • Cloud Native

  • Containerization

  • Design Patterns

  • Design Principles

  • IaC

  • IoT

  • Message Broker

  • Methods

  • Networking

  • Testing

• CircleCI

• Companies

• Cloud Native Application Bundle (CNAB)

• Cloud Native Computing Foundation (CNCF)

  • Argo CD

  • Argo Workflows

  • containerd

  • cri-o

  • Dapr

  • Envoy

  • Fluentd

  • Flux

  • Keptn

  • Kubernetes

    • etcd

    • Helm

    • Kubectl

    • Minikube

  • OpenTelemetry

  • Prometheus

• DevOps

• Docker

• .NET Framework

  • ASP.NET Core

  • Blazor

  • C#

  • .NET CLI

  • .NET Core

  • .NET Testing

  • NuGet

  • WPF

• eBPF

• Firebase

• Grafana Labs

• GraphQL

• gRPC

• HAProxy

• HashiCorp

  • Packer

  • Terraform

  • Vagrant

• JavaScript

  • Angular

  • Cypress

  • ECMAScript

  • Ionic

  • Node.js

    • Express

    • NPM

  • React

    • React Native

  • Redux

  • TypeScript

  • webpack

  • Yarn

• Jekyll

• k3d

• Keycloak

• Knative

• Kong

• Linux

  • CentOS

  • Rocky

  • Ubuntu

• Marp

• Microsoft

  • Azure

  • Azure DevOps

  • GitHub

  • Microsoft Graph

  • SharePoint Framework

  • Visual Studio 2022

• MongoDB

  • Atlas

  • Compass

• nginx

• Open Application Model (OAM)

• PHP

• PostgreSQL

• Pulumi

• Puppet

• Python

• QGIS

• RabbitMQ

• Redis

• Selenium

• Single-board computers

  • Odroid

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• Software as a Service (SaaS)

  • Okta

  • Stripe

• Sonar

• Splunk

• Travis

• Tuleap

• Windows

  • Hyper-V

  • MS-DOS

  • Windows 10

  • Windows Server

  • Windows Subsystem for Linux (WSL)

• Workstation