demo-mesh-arena

Slides

This demo was presented at the Devops D-Day 2018 in the Velodrome, Marseilles' famous stadium. Here are the slides, in French. Or a similar English version.

Step-by-step

For a step-by-step walk-through, read this (outdated - you might run through the "scenario" steps instead, read make man).

Pre-requisite

• Kubernetes cluster running
• Istio installed (much better with Kiali!)

Quick start

This quick start doesn't require you to clone the repo, but offers less interactivity.

If not already done, enable istio injection:

kubectl label namespace default istio-injection=enabled

Note: though not mandatory, it's the main purpose of this demo to use Istio networking rules. The demo will still run without Istio.

Run one of the commands below:

# With app metrics enabled:
kubectl apply -f <(curl -L https://raw.githubusercontent.com/jotak/demo-mesh-arena/main/quickstart-metrics.yml) -n default

# With app traces enabled:
kubectl apply -f <(curl -L https://raw.githubusercontent.com/jotak/demo-mesh-arena/main/quickstart-tracing.yml) -n default

# With both enabled:
kubectl apply -f <(curl -L https://raw.githubusercontent.com/jotak/demo-mesh-arena/main/quickstart-both.yml) -n default

# With none enabled:
kubectl apply -f <(curl -L https://raw.githubusercontent.com/jotak/demo-mesh-arena/main/quickstart-naked.yml) -n default

# Interactive mode:
kubectl apply -f <(curl -L https://raw.githubusercontent.com/jotak/demo-mesh-arena/main/quickstart-interactive.yml) -n default

In the interactive mode, players won't shoot by themselves, they need a human interaction. To shoot, click on a player, enter your name, then click the "shoot" button.

Expose UI

kubectl -n default port-forward svc/ui 8080:8080

Open http://localhost:8080.

Quick start with Kafka

By default, the mesh-arena services use simple HTTP endpoint to communicate. There's a Kafka switch that turns on using Kafka messaging for some communications. Run the following instructions to turn it on:

# Create a namespace for Kafka
kubectl create namespace kafka

# Install Kafka (Strimzi-powered)
wget -O - -o /dev/null  https://github.com/strimzi/strimzi-kafka-operator/releases/download/0.30.0/strimzi-cluster-operator-0.30.0.yaml | sed -e 's/namespace: myproject/namespace: kafka/g' | kubectl apply -n kafka -f -
kubectl apply -f <(curl -L https://raw.githubusercontent.com/jotak/demo-mesh-arena/main/k8s/strimzi.yml) -n kafka

# Wait a little bit that everything is ready
kubectl wait --timeout=300s --for=condition=ready kafka messaging -n kafka

# Deploy mesh-arena services with Kafka turned on
kubectl apply -f <(curl -L https://raw.githubusercontent.com/jotak/demo-mesh-arena/main/quickstart-kafka.yml) -n default

This is more or less equivalent to this make command: make kafka-se deploy-kt

Advanced

• Clone this repo
• Read the manual!

make man

It covers a bunch of make targets, deployment options, Istio scenario, with or without Kafka, etc.