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Build your own private Cloud environment

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Besuchen Sie Nicos Vortrag um zu erfahren wie Sie Ihre eigene Private Cloud on-premises aufbauen können. Ziel dieser Session ist es, dass Sie einen Überblick erhalten, wie man eine Private Cloud Umgebung auf Basis von Kubernetes, unter Berücksichtigung notwendiger Anforderungen, aufbaut.

Nico wird mit Ihnen über das Cluster Provisioning selbst sowie die benötigte Toolchain sprechen, die Sie benötigen um die eigene Umgebung erfolgreich zu betreiben. Im Vordergrund stehen dabei Themen wie Infrastructure as Code, CI/CD, Storage, Monitoring, Hochverfügbarkeit und Sicherheit. Erhalten Sie das notwendige Wissen sowie Best Practices, die Ihnen beim Aufbau Ihrer eigenen Private Cloud-Umgebung helfen.

Publicado en: Tecnología
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Build your own private Cloud environment

  1. 1. Build your own private Cloud environment Nico Meisenzahl, panagenda nico.meisenzahl@panagenda.com @nmeisenzahl
  2. 2. Make Your Data Work For You Build your own private Cloud environment Nico Meisenzahl DNUG 46, Essen
  3. 3. @panagenda Consultant. Blogger, speaker IBM Cloud Champion & Docker Community Leader Loves K8s, containers & automation. His desk is a ping pong table. Nico Meisenzahl @nmeisenzahl https://meisenzahl.org nico@meisenzahl.org https://panagenda.com/modernization nico.meisenzahl@panagenda.com
  4. 4. What is Cloud? • someone else’s computer • you do not need to care about everything • can abstract – Hardware → Infrastructure-as-a-Service – underlying OS/machine → Platform-as-a-Service – everything except your business logic → Function-as-a-Service 4
  5. 5. What is a private on-premises Cloud? • for your colleagues – someone else’s computer – a platform which abstracts various things – examples: • deploy, run and scale containers • just care about the code and let the system manage everything else • for you – your computer 😉 – a complex environment with multiple requirements • flexibel, scalable and fast • secure and state-of-the-art – various topics like compute, storage, high-availability, security, …. 5
  6. 6. Some words on Containers • A container consists of one or more processes that are isolated from the rest of the system • All files necessary for execution are provided by a separate image 6
  7. 7. Some words on Kubernetes • open-source system for automating deployment, scaling, and management of containerized applications using a declarative approach • greek for captain • abstracts underlying machines and OS • state-of-the-art for modern application deployment • used to manage your workload – Think of “vSphere for your containers” 7
  8. 8. Things you need to take care of • Kubernetes environment – provisioning, scalability, high-availability – update/backup strategy • Storage • Monitoring, Metrics • Log management • Security – Authentication, Authorisation, RBAC – Workload security • Surroundings – Registry, CI/CD, Vulnerability scanning, Operators, etc. – Service mesh, Functions/Serverless 8
  9. 9. Kubernetes provisioning • Kubernetes can be complex • “Kubernetes the hard way” is great for learning but not for production • Tools which can support you – Rancher Kubernetes Engine (RKE) – KubeOne by Loodse – IBM Cloud Private – kubeadm – https://kubernetes.io/docs/setup/pick-right-solution • design and size your cluster based on your needs – 1,3,5,7 master nodes, worker nodes, etcd nodee? • external dependencies: Storage, Load-Balancer, vSphere... 9
  10. 10. Kubernetes update strategy • one minor releases (1.x) every 3 months • the last 3 minor releases are maintained/supported – EOL after 9 months! • define your update strategy based on your needs – “in-place update” by adding/removing nodes – “side-by-side” migration 10
  11. 11. Kubernetes Nodes • Nodes aren’t persistent! – scaling up/down nodes based on your workload (autoscaling!) – updates (create new ones and delete old ones) • therefore use – a immutable approach instead of inplace upgrades – automation and Infrastructure-as-Code approaches • rethink your OS and Container Runtime – do you need a full-blown OS? – is Docker Engine needed? 11
  12. 12. Kubernetes backup strategy • Kubernetes API is stateful, everything else is stateless – stores its data in a etcd database • Applications deployed in the Cluster store their data externally • Restore etcd – recreate your scripted infrastructure – restore etcd snapshot • Rebuild everything with IaC – recreate your scripted infrastructure – run your pipelines to deploy your applications 12
  13. 13. Persistent Storage • stateful applications need volumes to store their data • worker nodes need to be stateless – scaling services on a multi-node environment – up/down scaling nodes • auto-provisioning is key – no manual tasks when deploying/scaling services – Persistent Volume Claims with Provisioner • NFS, Ceph, GlusterFS, Minio, ... 13
  14. 14. Log management • a central log management is needed to effectively debug applications – applications are scaled on multiple nodes – complex applications consist of many microservices • collect logs using – a logging agent on node-level • stdout/stderr are collected by Container runtime – a sidecar container approach • logging container collects logs and forwards them • Elasticsearch, Logstash/Fluentd, Kibana as logging stack 14
  15. 15. Monitoring & Metrics • the chosen system needs to “understand” Kubernetes • Prometheus is the common solution for monitoring and metrics collection for services as well as Kubernetes itself – collects and stores metrics – altering using Alertmanager – Dashboards with Grafana • Prometheus pulls metrics using HTTP – from URL – using Prometheus Exporter library or sidecar – dynamic Container monitoring using Kubernetes API (kube-state-metrics agent) 15
  16. 16. Authentication, Authorisation • external service to provide/manage users • Authentication – X509 Client certificates – OpenID – Bearer Tokens – static password file – Service Account (managed by K8s) – ... • Authorisation – used to define access level for different users and namespaces – Role Based Access Control (RBAC) is recommended – resources access is defined with verbs (get, create, delete, …) and identities (user, group, ...) 16
  17. 17. Cluster workload security • you will run different applications in one cluster! • use Pod Security Policies (PSP) to define what a pod is allowed to do – permit root, allowed user/group IDs – allowed volume types – allowed Linux capabilities, namespaces – ... • only use secure Images (vulnerability scanning) • permit usage of untrusted Container Registries 17
  18. 18. Ecosystem • Container Registry / Chart repository – to store internal images – include security topics like vulnerability scanning • Kubernetes Operators – can be used to deploy and manage custom ressources by extending the API – example: Resource called “mongodb” which deploys a production ready cluster • CI/CD – build continuous pipelines to package/build/deploy your applications – use templating to be able to deploy to various environments (e.g. Helm) 18
  19. 19. Some more thoughts ... • move logic from your code into your platform by using a service mesh – timeout/retry management, load-balancing, ... – end-to-end encryption • allow your Devs to only care about their code – until now, we only talked about Platform-as-a-Service – built Function-as-a-Service on top of K8s 19
  20. 20. Questions? • Slides → https://www.slideshare.net/nmeisenzahl 20
  21. 21. Headquarters, Austria: panagenda GmbH (Ltd.) Schreyvogelgasse 3/10 AT 1010 Vienna Phone: +43 1 89 012 89 Fax: +43 1 89 012 89-15 E-Mail: info@panagenda.com Headquarters, Germany: panagenda GmbH (Ltd.) Lahnstraße 17 DE 64646 Heppenheim Phone: +49 6252 67 939-00 Fax: +49 6252 67 939-16 E-Mail: info@panagenda.com USA: panagenda Inc. 60 State Street, Suite 700 MA 02109 Boston Phone: +1 617 855 5961 Fax: +1 617 488 2292 E-Mail: info@panagenda.com Germany: panagenda Consulting GmbH (Ltd.) Donnersbergstrasse 1 DE 64646 Heppenheim Phone: +49 6252 67 939-86 Fax: +49 6252 67 939-16 E-Mail: info@panagenda.com The Netherlands: Trust Factory B.V. 11th Floor, Koningin Julianaplein 10 NL 2595 AA The Hague Phone: +31 70 80 801 96 E-Mail: info@trust-factory.com © 2007-2015 panagenda Make Your Data Work For You
  22. 22. DNUG e.V. Pappelallee 78/79 10437 Berlin Telefon: +49 30 20898805 0 Telefax: +49 30 20898805 1 E-Mail: info@dnug.de Web: http://www.dnug.de

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