Kubernetes für Workstations Edge und IoT Devices

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Continuous Lifecycle | ContainerConf, November 2020, Vortrag von Mario-Leander Reimer (@LeanderReimer, Chief Software Architect bei QAware) === Dokument bitte herunterladen, falls unscharf! Please download slides if blurred! === Abstract: Wenn es darum geht, Kubernetes auf Hardware mit eingeschränkten Ressourcen wie einer lokalen Entwickler-Workstation oder Edge- und IoT-Geräten zu betreiben, ist eine volle Kubernetes-Distribution nicht die ideale Wahl. Viel besser dafür geeignet ist stattdessen eine neue Generation von leichten und dennoch zertifizierten K8s-Distributionen. In diesem Vortrag werden wir uns zwei beliebte Optionen genauer ansehen: MicroK8s und K3s. Nach einem kurzen Überblick der jeweiligen Funktionen unterziehen wir beide Kandidaten einem Live-Praxistest auf realer Hardware. Dieser Vortrag ist Hands-on und unterhaltsam zugleich, und zeigt, dass man als Entwickler keinen Doktortitel in K8s Clusterology benötigt.

Software

Lightweight Kubernetes
Kubernetes für Workstations, Edge und IoT Devices
@LeanderReimer #qaware #CloudNativeNerd #ConCon20

// ContainerConf 2020 // Kubernetes für Workstations, Edge and IoT Devices // @LeanderReimer #cloudnativenerd #qaware #ConCon20
Installing K8s in the Cloud is relatively easy.
3
Cloud / Data CenterCloud Layer
$ eksctl create cluster -n eks-demo -f cluster.yml
$ aksctl create cluster --name aks-demo -file cluster.yaml
$ gcloud container cluster create gke-demo

// ContainerConf 2020 // Kubernetes für Workstations, Edge and IoT Devices // @LeanderReimer #cloudnativenerd #qaware #ConCon20
Installing K8s on Fog, Edge and IoT is not so easy.
4
Cloud / Data Center
Fog Nodes
Devices
Gateways
Cloud Layer
Fog Layer
Edge Layer

// ContainerConf 2020 // Kubernetes für Workstations, Edge and IoT Devices // @LeanderReimer #cloudnativenerd #qaware #ConCon205
Do you have a PhD in
Kubernetes
clusterology?

// ContainerConf 2020 // Kubernetes für Workstations, Edge and IoT Devices // @LeanderReimer #cloudnativenerd #qaware #ConCon20
• CentOS 7.7 with Containerd
• Kubernetes 1.16 with K8s Dashboard
• Calico, External-DNS
• MetalLB + NGINX-Ingress
• Rook CephFS
• Cert-Manager, Sealed Secrets
• Elastic-Stack (Elasticsearch, Kibana, Fluentd)
• Prometheus, Grafana, Grafana Loki
• Istio, Knative, Jaeger
• Clair, Vault, Keycloak
6 // ContainerConf 2020 // Kubernetes für Workstations, Edge and IoT Devices // @LeanderReimer #cloudnativenerd #qaware #ConCon20

// ContainerConf 2020 // Kubernetes für Workstations, Edge and IoT Devices // @LeanderReimer #cloudnativenerd #qaware #ConCon207
https://en.wikipedia.org/wiki/Bus_factor

// ContainerConf 2020 // Kubernetes für Workstations, Edge and IoT Devices // @LeanderReimer #cloudnativenerd #qaware #ConCon20
https://k3s.iohttps://microk8s.io
8 // ContainerConf 2020 // Kubernetes für Workstations, Edge and IoT Devices // @LeanderReimer #cloudnativenerd #qaware #ConCon20

// ContainerConf 2020 // Kubernetes für Workstations, Edge and IoT Devices // @LeanderReimer #cloudnativenerd #qaware #ConCon209
5 x Intel NUC i3
5 x Raspberry Pi 3 CoM
miniNodes Carrier Board

// ContainerConf 2020 // Kubernetes für Workstations, Edge and IoT Devices // @LeanderReimer #cloudnativenerd #qaware #ConCon20
MicroK8s - Zero-ops Kubernetes
• Certiﬁed Kubernetes distribution. Backed by Canonical.
• Pure upstream, no APIs added or removed. Currently v1.19
• A single package of K8s for 42 ﬂavours of Linux. Uses multipass to run a local Ubuntu
VM under Windows and Mac.
• Made for developers. Runs on cloud, workstations, Edge and IoT.
• Dozens of infrastructure add-ons: DNS, registry, dashboard, storage, RBAC, ingress,
MetalLB, GPU, Istio, Linkerd, Knative, ﬂuentd, Prometheus, Jaeger, Ambassador,
Cilium, Helm, …
• High Availability and Multi-node cluster conﬁguration supported.
10

// ContainerConf 2020 // Kubernetes für Workstations, Edge and IoT Devices // @LeanderReimer #cloudnativenerd #qaware #ConCon20
MicroK8s Demo
MicroK8s Demo
https://github.com/lreimer/lightweight-k8s

// ContainerConf 2020 // Kubernetes für Workstations, Edge and IoT Devices // @LeanderReimer #cloudnativenerd #qaware #ConCon20
K3s - 5 less than K8s
• Certiﬁed Kubernetes distribution. Backed by Rancher.
• Legacy, alpha, non-default features are removed. Currently v1.18.9+k3s1
• Suitable for Edge, IoT, ARM64, ARMv7, CI, Workstations and the Cloud
• LoadBalancer support with Traeﬁk based Ingress.
• High Availability with an External DB or Embedded DB (experimental)
• Easy to install, run and auto-update. Single < 40MB binary.
• k3sup: from Zero to KUBECONFIG in < 1 min https://k3sup.dev/
12

// ContainerConf 2020 // Kubernetes für Workstations, Edge and IoT Devices // @LeanderReimer #cloudnativenerd #qaware #ConCon20
K3s Demo
https://github.com/lreimer/lightweight-k8s

Mario-Leander Reimer
Principal Software Architect, QAware GmbH
mario-leander.reimer@qaware.de
https://www.qaware.de
https://speakerdeck.com/lreimer/
https://github.com/lreimer/
&

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IT-Tage 2023, Frankfurt am Main (Patrick Albert) Die Rollen und insbesondere deren Zuständigkeiten sind in Scrum recht klar geregelt: Der Product Owner sorgt für das "Was", der Scrum Master für das "Wie" und die Developer für die eigentliche Umsetzung. Solange es sich dabei um ein internes Projekt mit einem komplett internen Team handelt, sind damit bereits die zentralen Fragen beantwortet. Ein wenig differenzierter zu betrachten sind allerdings Teams mit mehreren Parteien wie etwa beim Einsatz von Dienstleistern. Muss etwa zwingend der Kunde den Product Owner stellen oder kann dieser auch auf der Seite des Dienstleisters stehen? Falls alle Developer vom gleichen Dienstleister bereitgestellt werden, würde diese Konstellation sicherlich einige Kommunikationswege verkürzen. Allerdings hat ein Product Owner auf der Seite eines Dienstleisters sicher nicht die gleichen Verbindungen zu den Stakeholdern (Nutzer, Geldgeber, ...) des Produkts wie ein interner Product Owner – wie also könnte er ihre Anforderungen dann gut vor dem Team vertreten? Ähnliche Fragen stellen sich auch für den Scrum Master und das Development-Team. In den meisten Fällen gibt es für verschiedene Konstellationen jeweils Vor- und Nachteile – und zwar sowohl für den Kunden als auch für den Dienstleister. Wichtig bei der Entscheidung für eine dieser Konstellationen ist außerdem die Art des Projekts, der Kreis der Stakeholder, das zur Verfügung stehende Budget, der Zeitrahmen und noch einiges mehr. Dieser Vortrag beleuchtet verschiedene dieser Varianten und zeigt Vorteile, Nachteile und Risiken auf.

"Mixed" Scrum-Teams – Die richtige Mischung macht's!

QAware GmbH

Make Developers Fly – Helping developers to build better applications Cloud Native Night, Mainz, November 2023, Alex Krause Platform Engineering is the next stage of DevOps and accelerates software developers even more to build applications faster and bring products rapidly to the customers. In this meetup, we show you the key principles of platform engineering, as we experienced them in our projects, and additionally show you a better way to manage your internal software platforms. PRINCIPLES FOR PLATFORM ENGINEERING, Alex Krause How do we help our developers to fly instead of crashing miserablely? The answer is Platform Engineering, a discipline for building internal developer platforms (IDPs) to simplify software delivery for product teams. In this talk, you'll learn how Platform Engineering evolved from the DevOps movement and what principles and best practices make for a good implementation. Finally, we'll take a look at reference architectures that can support your platform.

Make Developers Fly: Principles for Platform Engineering

QAware GmbH

Codineers Rosenheim Meetup, 2. November 2023 (Dominik Haas, QAware) Wer kennt es nicht: Langsame, instabile und wartungsintensive Tests von Frontends und die Schmerzen damit. Aber in den letzten Jahren und Monaten hat sich hier viel getan und Playwright ist der vielversprechende neue Stern der Web-Automatisierung. Ich werde in meinem Talk über das Testen von Frontends sprechen und speziell auf Playwright als spannendes Werkzeug eingehen. Neben der praktischen Einführung möchte ich auch mit Euch über Best Practices sprechen und einen Versuch wagen die Testpyramide zu töten (oder sie zumindest etwas zu beschädigen).

Der Tod der Testpyramide? – Frontend-Testing mit Playwright

QAware GmbH

Sie kennen doch bestimmt das "Gesetz des Instruments": Wer als Werkzeug nur ein modernes Frontend-Framework hat, löst jedes Problem mit einer Single Page-Applikation. So oder so ähnlich, nur halt mit Hammer und Nagel lautet es, beschreibt jedoch ganz gut die aktuelle Situation der JavaScript-Welt. Auf nahezu jede Anforderung wird mit einer aufgeblähten, clientseitig gerenderten SPA geantwortet. Doch ist es schön langsam an der Zeit, dass wir uns fragen sollten: Ist das wirklich alles? Und die Antwort lautet ziemlich sicher "Nein". Doch genau diesem Thema widmen wir uns und werfen einen Blick auf die Alternativen und da gibt es viele. Im React-Ökosystem findet aktuell ein kleiner Umbruch statt. Mit Server Side Rendering, Static Site Generation, Server Components und Frameworks wie Next verschiebt sich ein Teil der Arbeit in Richtung Server. Dieser Trend ist auch bei Vue, Svelte und Angular zu beobachten. Und genau das ist es, was die sogenannten Meta-Frameworks ausmacht. Uns als EntwicklerInnen gibt das mehr Flexibilität, um auf Anforderungen reagieren zu können. Sie müssen nicht mehr den kompletten Quellcode zum Client übertragen, haben bessere Caching-Möglichkeiten und auch die Suchmaschinen sind Ihnen dankbar. Dieser Vortrag gibt Ihnen einen Überblick über die wichtigsten Features von Meta-Frameworks und wo und vor allem wie sie gewinnbringend eingesetzt werden können.

Was kommt nach den SPAs

QAware GmbH

Digital Future Congress (DFC) 2023, September 2023, München, Andreas Zitzelsberger (Business Unit Director bei QAware) == Dokument bitte herunterladen, falls unscharf! Please download slides if blurred! == Alt-Systeme in die Cloud migrieren – mit sechs Leitplanken geht das effizient und sicher. Neu: Künstliche Intelligenz kann jetzt zum Turbo werden! Wir nutzen KI bei der Cloud-Migration und zeigen in diesem Vortrag, was geht und was nicht.

Cloud Migration mit KI: der Turbo

QAware GmbH

MedTech Stars, Webkonferenz, September 2023, Josef Adersberger (CEO bei QAware) == Dokument bitte herunterladen, falls unscharf! Please download slides if blurred! == Der Vortrag „Migration von stark regulierten Anwendungen in die Cloud: Dem Teufel die Seele verkaufen oder Himmel auf Erden?“ erkundet das wachsende Bedürfnis und die Herausforderungen, medizinische Anwendungen in die Cloud zu migrieren. Bei den entsprechenden Anwendungen stellt laut einer Umfrage der Datenschutz für 82% der Anwendungen die größte Herausforderung dar, um den Schritt in die Cloud zu machen. Trotzdem wächst der Druck, diesen Schritt zu vollziehen, aufgrund des Innovations- und Digitalisierungsbedarfs, der durch gesetzliche Initiativen wie das Krankenhaus-Zukunftsgesetz, gestiegene Patientenerwartungen und den immer klareren medizinischen Impact der Digitalisierung angetrieben wird. Die zentrale Frage, die in diesem Vortrag erörtert wird, ist, wie man hochregulierte Anwendungen schrittweise in die Cloud migrieren kann. Hierzu werden wir einen Ansatz vorstellen und anhand von exemplarischen Anwendungen demonstrieren, wie eine solche Migration erfolgreich durchgeführt werden kann. Abschließend fassen wir den Vortrag mit fünf leitenden Prinzipien zusammen, die bei der Migration von stark regulierten Anwendungen in die Cloud beachtet werden sollten. Diese Prinzipien bieten einen nützlichen Leitfaden für Unternehmen und Institutionen, die den Umzug ihrer Anwendungen in die Cloud erwägen, und sollen dazu beitragen, die Herausforderungen der Cloud-Migration in diesem hochregulierten Bereich erfolgreich zu bewältigen.

Migration von stark regulierten Anwendungen in die Cloud: Dem Teufel die See...

QAware GmbH

SAA 2023 | Software Architecture Alliance, September 2023, München, Mario-Leander Reimer (@LeanderReimer, CTO bei QAware) == Dokument bitte herunterladen, falls unscharf! Please download slides if blurred! == Die Cloud hat bereits heute einen größeren CO2-Fußabdruck als die Luftfahrtindustrie, mit steigender Digitalisierung und Cloudifizierung wird sich dieser Trend fortsetzen, wenn wir nichts dagegen unternehmen. Viele Kubernetes-basierte Installationen sind gemessen am eigentlich benötigten Ressourcen Bedarf stark überdimensioniert und tragen so unnötig zur globalen Erwärmung bei. Wie sieht die Energiebilanz Ihres Clusters und Workloads aus? In diesem Vortrag zeigen wir Ansätze und Technologien, die dabei helfen K8s-Cluster grün(er) zu machen. Zunächst braucht es Transparenz: Wie sieht die Energiebilanz des Clusters und seiner Workloads aus? Erst danach lassen sich diese gezielt auf ihre Energiesparsamkeit hin optimieren. Und das ist gar nicht so schwer, also packen wir es an!

Aus blau wird grün! Ansätze und Technologien für nachhaltige Kubernetes-Cluster

QAware GmbH

SAA 2023 | Software Architecture Alliance, September 2023, München, Ildikó Tárkányi (Senior Software Engineer bei QAware) == Dokument bitte herunterladen, falls unscharf! Please download slides if blurred! == Der Traum von den unendlichen Weiten der Daten ist schnell ausgeträumt, wenn wir unsere APIs nicht im Griff haben. Dabei ist es egal, ob wir uns APIs zwischen unseren Services, zwischen Frontend und Backend oder zu Fremdsystemen anschauen - APIs sind ein fundamentaler Bestandteil unserer Softwarearchitektur und ohne Testautomatisierung geht gar nichts. Schlecht geschriebene Integrationstests mit selbst erfundenen Testfällen für unsere APIs können richtig nerven: Wir rufen die APIs auf und hoffen, dass genau das zurückkommt, was wir erwarten. Das geht auch anders: Wir werfen einen Blick auf andere Testansätze, bewerten, welche Aspekte diese jeweils testen und schauen zum Beispiel auf: • Contract Based Testing • Black Box Testing der OpenAPI Specs • Trace-basiertes Testing

Endlich gute API Tests. Boldly Testing APIs Where No One Has Tested Before.

QAware GmbH

Cloud Native Night, Munich, September 2023, Bernhard Schaidhammer === Please download slides if blurred! === Cilium is a powerful tool for network policies and also encryption between the Kubernetes nodes. Cilium hooks deep into Kubernetes in the network stack as an plugin and can even replace the AWS CNI Plugin. This talk will share our project experiences. Topics involve: - Network Policies - Encryption - Hubble (Observability) - Installation - CLI Usage (Hubble / Cilium)

Kubernetes with Cilium in AWS - Experience Report!

QAware GmbH

Container Days 2023, September 2023, Hamburg, Mario-Leander Reimer (@LeanderReimer, CTO @QAware). == Dokument bitte herunterladen, falls unscharf! Please download slides if blurred! == Elasticity and unlimited scalability are the holy grail for any cloud-native application. Now you might think: “That’s easy!!! I just run my containers on a Kubernetes cluster and I am done.” But is it really that simple? Turns out it’s not! Your application as well as your cloud infrastructure and K8s cluster need to address and support these non-functional requirements. This session will have a detailed and also practical look at the different ways of autoscaling in Kubernetes. We will give an overview of the technical foundations and prerequisites, and then showcase several frameworks and technologies that can be used to flexibly autoscale your cluster and your cloud-native workloads.

50 Shades of K8s Autoscaling

QAware GmbH

Heise DevSec 2023, September 2023, Karlsruhe, Mario-Leander Reimer (@LeanderReimer, CTO @QAware). == Dokument bitte herunterladen, falls unscharf! Please download slides if blurred! == Continuous Delivery ist allgegenwärtig. Wirklich? Viele Teams straucheln immer noch dabei, regelmäßig gut getestete und vor allem sichere Software auszuliefern. Immer mit der gleichen, guten alten Ausrede: die nicht-funktionalen Tests seien zu aufwändig und zu teuer umzusetzen. Doch genau das Gegenteil ist der Fall! In diesem Vortrag gehen wir kurz auf die aktuellen Bedrohungen und die Bedeutung früher und regelmäßiger Sicherheitstests von APIs ein. Anschließend zeigen wir, wie einfach es ist, diese Tests kontinuierlich und asynchron mit OWASP ZAP und Testkube gegen REST- und GraphQL-APIs direkt auf einem Kubernetes-Cluster auszuführen; immer dann wenn sich die API und der Service ändern.

Kontinuierliche Sicherheitstests für APIs mit Testkube und OWASP ZAP

QAware GmbH

Cloud Native Night, Mainz, September 2023, Markus Zimmermann === Please download slides if blurred! === The topic of service mesh is still present at every major DevOps conference and is the subject of controversial discussions. A service mesh comes with the promise of implementing cross-functional requirements of microservices such as observability or secure communication without changes within the services. The operational effort and the integration of the services within the service mesh should also be problem-free. But do the common service mesh implementations keep these promises? In a client project we have gained experience with Linkerd and can say: we did not achieve the benefits without pain. We want to share these experiences and what you can take away for your next project!

Service Mesh Pain & Gain. Experiences from a client project.

QAware GmbH

WeAreDevelopers World Congress 2023, July 2023, Mario-Leander Reimer === Please download slides if blurred! === Elasticity and unlimited scalability are the holy grail for any cloud-native application. Now you might think: “That’s easy!!! I just run my containers on a Kubernetes cluster and I am done.” But is it really that simple? Turns out it’s not! Your application as well as your cloud infrastructure and K8s cluster need to address and support these non-functional requirements. This session will have a detailed and also practical look at the different ways of autoscaling in Kubernetes. We will give an overview of the technical foundations and prerequisites, and then showcase several frameworks and technologies that can be used to flexibly autoscale your cluster and your cloud-native workloads.

50 Shades of K8s Autoscaling

QAware GmbH

Kubernetes Community Days Munich 2023, Juli 2023, Mario-Leander Reimer The cloud already has a larger CO2 footprint than the worldwide aviation industry. With increasing digitalization and cloudification this trend will continue if we don't do anything about it. Many Kubernetes installations are greatly oversized in terms of the resources actually required and thus contribute unnecessarily to global warming. What is the energy balance of your cluster and its workloads? In this session we will discuss approaches and technologies that help to make K8s clusters green(er). First of all, transparency is needed: what is the energy balance of the cluster and its workloads? Only then we can start to optimize for better energy efficiency. And it's not that difficult, so let's get started!

Blue turns green! Approaches and technologies for sustainable K8s clusters.

QAware GmbH

Mastering Kubernetes 2023, Juli 2023, Sonja Wegner Gute APIs sind das Herzstück erfolgreicher digitaler Produkte und Cloud-nativer Anwendungen. Doch schlecht verwaltete APIs werden schnell zum Albtraum. Damit es kein böses Erwachen gibt, setzen wir auf API Gateways: Diese sind etabliert und bekannt und helfen uns bei der Verwaltung der APIs. Sie regeln unter anderem Traffic Management, Rollout-Szenarien, Versionierung, Zugriffskontrolle und Diagnostizierbarkeit. In diesem Vortrag werden wir das Cloud-native API-Gateway-Ökosystem näher betrachten: Gloo, KrakenD, Kong, Envoy et al. Aber welches davon ist das Richtige für den Einsatz im nächsten Projekt? Lasst es uns herausfinden!

Per Anhalter zu Cloud Nativen API Gateways

QAware GmbH

Mastering Kubernetes 2023, Juli 2023, Mario-Leander Reimer Die Cloud hat bereits heute einen größeren CO2-Fußabdruck als die Luftfahrtindustrie, mit steigender Digitalisierung und Cloudifizierung wird sich dieser Trend fortsetzen, wenn wir nichts dagegen unternehmen. Viele Kubernetes-basierte Installationen sind gemessen am eigentlich benötigten Ressourcen Bedarf stark überdimensioniert und tragen so unnötig zur globalen Erwärmung bei. Wie sieht die Energiebilanz Ihres Clusters und Workloads aus? In diesem Vortrag zeigen wir Ansätze und Technologien, die dabei helfen K8s-Cluster grün(er) zu machen. Zunächst braucht es Transparenz: Wie sieht die Energiebilanz des Clusters und seiner Workloads aus? Erst danach lassen sich diese gezielt auf ihre Energiesparsamkeit hin optimieren. Und das ist gar nicht so schwer, also packen wir es an!

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