212-jaeger.sh

# Source: https://gist.github.com/4418b87dea48c7c4b1811d65f5133947

###################################################################
# Distributed Tracing With Jaeger And OpenTelemetry In Kubernetes #
# https://youtu.be/FK0uh-7nDSg                                    #
###################################################################

# Additional Info:
# - Jaeger: https://jaegertracing.io
# - You MUST Instrument Your Code With OpenTelemetry!: https://youtu.be/oe5YYh9mhzw

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

# Create a Kubernetes cluster with Ingress set as default

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

cd silly-demo

# Replace `127.0.0.1` with the Ingress Service IP
export INGRESS_HOST=127.0.0.1

# Install `yq` CLI from https://github.com/mikefarah/yq if you do not have it already

# Install `jq` CLI from https://stedolan.github.io/jq/download/

yq --inplace \
    ".spec.rules[0].host = \"silly-demo.$INGRESS_HOST.nip.io\"" \
    kustomize/base/ingress.yaml

yq --inplace \
    ".spec.rules[0].host = \"pinger.$INGRESS_HOST.nip.io\"" \
    kustomize/overlays/pinger-jaeger/ingress.yaml

kubectl create namespace production

helm repo add jetstack https://charts.jetstack.io

helm repo update

helm upgrade --install cert-manager jetstack/cert-manager \
    --namespace cert-manager --create-namespace \
    --set installCRDs=true --wait

kubectl create namespace observability

kubectl --namespace observability apply \
    --filename https://github.com/jaegertracing/jaeger-operator/releases/download/v1.39.0/jaeger-operator.yaml

#######################################
# Push OpenTelemetry Traces To Jaeger #
#######################################

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

echo "
apiVersion: jaegertracing.io/v1
kind: Jaeger
metadata:
  name: jaeger
spec:
  ingress:
    enabled: true
    hosts:
      - jaeger.$INGRESS_HOST.nip.io
" | kubectl --namespace observability apply --filename -

kubectl --namespace observability get jaegers

echo "http://jaeger.$INGRESS_HOST.nip.io"

# Open it in a browser

cat kustomize/overlays/stateful-db-jaeger/deployment-patch.yaml

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

##########################################
# Explore OpenTelemetry Traces In Jaeger #
##########################################

cat main.go

cat video.go

curl -X POST "http://silly-demo.$INGRESS_HOST.nip.io/video?id=wNBG1-PSYmE&title=Kubernetes%20Policies%20And%20Governance%20-%20Ask%20Me%20Anything%20With%20Jim%20Bugwadia"

curl -X POST "http://silly-demo.$INGRESS_HOST.nip.io/video?id=VlBiLFaSi7Y&title=Scaleway%20-%20Everything%20We%20Expect%20From%20A%20Cloud%20Computing%20Service%3F"

curl "http://silly-demo.$INGRESS_HOST.nip.io/videos" | jq .

# Show the traces in Jaeger

# Service: `silly-demo`
# Tags: `http.method=POST`

cat fibonacci.go

curl "http://silly-demo.$INGRESS_HOST.nip.io/fibonacci?number=10"

# Show the traces in Jaeger

cat video.go

curl -X POST "http://silly-demo.$INGRESS_HOST.nip.io/video?id=VlBiLFaSi7Y&title=Scaleway%20-%20Everything%20We%20Expect%20From%20A%20Cloud%20Computing%20Service%3F"

# Show the traces in Jaeger

#####################################################
# Distributed Tracing With OpenTelemetry And Jaeger #
#####################################################

kubectl --namespace production apply \
    --kustomize kustomize/overlays/pinger-jaeger

curl "http://pinger.$INGRESS_HOST.nip.io/ping?url=http://silly-demo:8080"

# Show the traces in Jaeger

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

# Destroy or reset the cluster