Hannover Kubernetes/Cloud-Native Meetup Notes
===

2021-02
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Link: https://www.meetup.com/de-DE/Hannover-Kubernetes-Cloud-Native-Meetup/events/276284796/
- Whiteboard by Tobi - using Flux and Helm, issues with timeout: root cause could be backtraced to a manual helm packaging that resulted in a secret larger than 1MB which was not accepted by the API server. 10 helm revisions per version * 45 charts * 1MB secret = every 60 seconds the API server was bombarded with 450MB
- https://www.weave.works/blog/argo-flux-join-forces
- Dominik: Linkerd issue (https://github.com/linkerd/linkerd2/issues/5599)
- Dominik, Lutz and Tobi are (overall very happy) users of linkerd2
- Discussed Circuit Breakers in general (linkerd2 does not have it, Istio does https://istio.io/latest/docs/tasks/traffic-management/circuit-breaking/)
- https://www.infoq.com/news/2019/07/gould-linkerd-traffic-mgmt/
- Service Mesh vs. API Gateway?
- Service Mesh primarily inside and across clusters, e.g. auto mTLS inside the cluster is a huge plus for linkerd, it just works
- API gateway for user facing stuff
- next meetup in early March
- go vs. rust vs. elixir
- https://elixir-lang.org/ - Fault Tolerance advantages over Go
- https://www.mgasch.com/

Potential topic:
- AWS Kubernetes Controller ACK?

2020-01
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Link: https://www.meetup.com/Hannover-Kubernetes-Cloud-Native-Meetup/events/267272595/

Links from the session:
* CNCF Event facts: https://events19.linuxfoundation.org/events/kubecon-cloudnativecon-north-america-2019/
* Service Mesh at Nordstrom, Link: https://www.youtube.com/watch?v=sq8nsjuJqO4
* Operator session from Elastic, Link: https://www.youtube.com/watch?v=wMqzAOp15wo, Slides https://static.sched.com/hosted_files/kccncna19/51/Writing%20a%20Kubernetes%20operator%20-%20the%20Hard%20Parts%20-%20KubeCon%202019.pdf
* KEDA - event driven serverless containers in K8s, Link: https://www.youtube.com/watch?v=ZK2SS_GXF-g, Project site: https://keda.sh/
* KubeCon Schedule: https://kccncna19.sched.com (All slides can be accessed via the schedule site as well)
* My Schedule: https://kccncna19.sched.com/bjoernbrundert
* KubeCon 2019 North America Playlist with all Recordings: https://www.youtube.com/watch?v=WS0OcCUt4io&list=PLj6h78yzYM2NDs-iu8WU5fMxINxHXlien
* KubeCon/CloudNativeCon events in 2020: March 30 – April 2 in Amsterdam, November 18-20 in Boston
* Download videos for offline consumption: create a youtube/google account; create a new youtube playlist (e.g. „KubeCon 2019 San Diego offline“), type „not listed“; Install youtube-dl e.g. via `brew install youtube-dl` on a Mac; running `youtube-dl <your_youtube_playlist_url>` will download all videos from your playlist into your current directory

How to best learn Kubernetes?
- https://kubernetes.academy
- official trainings from Linux Foundation: https://training.linuxfoundation.org/training/introduction-to-kubernetes/, https://training.linuxfoundation.org/training/kubernetes-fundamentals/, ...
- Nigel Poulton courses on various learning platforms
- official kubernetes documentation (https://kubernetes.io/docs/home/) and concepts (https://kubernetes.io/docs/concepts/)
- KinD (https://kind.sigs.k8s.io/)

2019-10
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Link: https://www.meetup.com/Hannover-Kubernetes-Cloud-Native-Meetup/events/264365980/

Links from Bjoerns session:
* State of DevOps Report 2019: https://services.google.com/fh/files/misc/state-of-devops-2019.pdf
* TGIKs: https://github.com/vmware-tanzu/tgik/blob/master/playlist.md
* Open at VMware: http://vmware.github.io/
* Tanzu Open Source Projects (Velero, ...): https://github.com/vmware-tanzu
* Harbor: http://goharbor.io
* Open vSwitch Project: http://www.openvswitch.org/
* Pivotal Application Server (PAS) on Kubernetes announcement: https://blogs.vmware.com/cloudnative/2019/07/16/pas-on-kubernetes-improves-the-developer-experience/
* Project Pacific Technical Overview: https://blogs.vmware.com/vsphere/2019/08/project-pacific-technical-overview.html
* Project Pacific VMworld Session Videos: https://videos.vmworld.com/global/2019?q=pacific
* Cluster API alpha demo: https://www.youtube.com/watch?v=BJvvkLEQjVk && https://www.youtube.com/watch?v=gwCzfAdPCQg
* VMware Tanzu Overview: https://www.youtube.com/watch?v=rYO4WrPKWI8
* Run Upstream Kubernetes Consistently Across Clouds with VMware Tanzu (KUB1840BU): https://videos.vmworld.com/global/2019?q=KUB1840BU
* Introducing VMware Tanzu Mission Control: Manage Kubernetes at Scale (KUB1835BU): https://videos.vmworld.com/global/2019?q=KUB1835BU

Future Topics/Interests:
* Kubernetes Failure Stories with Henning
* Something in action
* Cluster API
* Machine Learning workloads on k8s, examples
* Velero hands on mit Dennis
* CKA Exam Experience
* Experience with Enterprise PKS presentation
* Observabvility and monitoring in general, Prometheus
* Operators and CRDs

Potential next meetup:
* Jan 7 or 8

Other links and notes:
* https://cuelang.org/
* Updates in kubernetes 1.16: https://www.cncf.io/webinars/whats-new-in-kubernetes-1-16/
* Kubernetes in Docker (KIND): https://github.com/kubernetes-sigs/kind
* For fun: https://www.youtube.com/watch?v=7LOF7KM7UhY