211-open-telemetry.sh

# Source: https://gist.github.com/38b4b02bef304fc98c519f6dd6074545

#####################################################
# You MUST Instrument Your Code With OpenTelemetry! #
# https://youtu.be/oe5YYh9mhzw                      #
#####################################################

# Additional Info:
# - OpenTelemetry: https://opentelemetry.io

#########
# Setup #
#########

# Create a Kubernetes cluster

git clone https://github.com/vfarcic/silly-demo

cd silly-demo

kubectl create namespace production

################################################
# What Is OpenTelemetry And Why Do We Need It? #
################################################

cat main.go

# Open https://opentelemetry.io/registry

cat opentelemetry.go

kubectl kustomize --enable-helm \
    kustomize/overlays/stateful-db \
    | kubectl --namespace production apply --filename -

export POD_NAME=$(kubectl --namespace production get pods \
    --selector "app.kubernetes.io/name=silly-demo" \
    --output name)

kubectl --namespace production exec --stdin --tty \
    $POD_NAME -- cat traces.json

###########
# Destroy #
###########

kubectl delete namespace production

cd ..

rm -rf silly-demo

# Destroy or reset the cluster