davideicardi

Deploy VerneMq inside Kubernetes

Allow the default service account to read pods data, by adding a role binding:

TODO: Now the yaml works only for the dev1 namespace, how can I make it more generic?

kubectl apply -f ./add-read-pods-binding.yaml

AlinaNova21

Kubernetes and Arm

Getting rke and Rancher setup to run kubernetes on arm is interesting. There is no official support yet via rancher, although there is interest and some work done towards those efforts. This is my attempt at getting a cluster of 3 Pis (2 3Bs and 1 3B+) provisioned and registered to a rancher 2 server.

Prep

I've successfully completed this both with Hypriot OS 1.9.0 and the arm64 builds https://github.com/DieterReuter/image-builder-rpi64 Both times I used the same basic cloud-init setup

zodvik

Producer

Setup
bin/kafka-topics.sh --zookeeper localhost:2181/kafka-local --create --topic test-rep-one --partitions 6 --replication-factor 1
bin/kafka-topics.sh --zookeeper localhost:2181/kafka-local --create --topic test-rep-two --partitions 6 --replication-factor 3

Single thread, no replication
bin/kafka-run-class.sh org.apache.kafka.tools.ProducerPerformance --print-metrics --topic test-rep-one --num-records 6000000 --throughput 100000 --record-size 100 --producer-props bootstrap.servers=kafka_host:9092 buffer.memory=67108864 batch.size=8196

Single-thread, async 3x replication

so0k

Kubectl output options

Let's look at some basic kubectl output options.

Our intention is to list nodes (with their AWS InstanceId) and Pods (sorted by node).

We can start with:

kubectl get no

lukescott

/*
  var Trait1 = {
    method1() {}
  };
  
  var Trait2 = {
    method2() {}
  };
  
  var Trait3 = mixin({

staltz

The introduction to Reactive Programming you've been missing

(by @andrestaltz)

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This tutorial as a series of videos

If you prefer to watch video tutorials with live-coding, then check out this series I recorded with the same contents as in this article: Egghead.io - Introduction to Reactive Programming.

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