221-groundcover.sh

# Source: https://gist.github.com/93b1060b77f7ccacf422192c73e7bf24

##########################################################################
# Kubernetes Observability And Troubleshooting With groundcover and eBPF #
# https://youtu.be/2pwgbeY7wmY                                           #
##########################################################################

# Additional Info:
# - groundcover: https://groundcover.com
# - Is eBPF The End Of Kubernetes Sidecar Containers?: https://youtu.be/7ZVQSg9HX68
# - The Best Performance And Load Testing Tool? k6 By Grafana Labs: https://youtu.be/5OgQuVAR14I

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

# Create a Kubernetes cluster.

# See https://docs.groundcover.com/docs/install-groundcover/requirements#environments
#   for the list of supported clusters.

# Do not use a local Kubernetes cluster (e.g., Rancher Desktop)
#   since some of the Groundcover features might not work.

helm repo add traefik https://helm.traefik.io/traefik

helm repo update

helm upgrade --install traefik traefik/traefik \
    --namespace traefik --create-namespace --wait

# If NOT EKS
export INGRESS_HOST=$(kubectl --namespace traefik \
    get service traefik \
    --output jsonpath="{.status.loadBalancer.ingress[0].ip}")

# If EKS
export INGRESS_HOSTNAME=$(kubectl --namespace traefik \
    get service traefik \
    --output jsonpath="{.status.loadBalancer.ingress[0].hostname}")

# If EKS
export INGRESS_HOST=$(dig +short $INGRESS_HOSTNAME) 

echo $INGRESS_HOST

# Repeat the `export` commands if the output is empty.

# If the output contains more than one IP, wait for a while 
#   longer, and repeat the `export` commands.

# If the output continues having more than one IP, choose one of
#   them and execute `export INGRESS_HOST=[...]` with `[...]`
#   being the selected IP.

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

cd groundcover-demo

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

yq --inplace \
    ".spec.rules[0].host = \"silly-demo.$INGRESS_HOST.nip.io\"" \
    k8s/ing.yaml

cat k6.js \
    | sed -e "s@http\.get.*@http\.get('http://silly-demo.$INGRESS_HOST.nip.io');@" \
    | tee k6.js

cat k6-db.js \
    | sed -e "s@http\.get.*@http\.get('http://silly-demo.$INGRESS_HOST.nip.io/video?id=something\&title=else');@" \
    | tee k6-db.js

sh -c "$(curl -fsSL https://groundcover.com/install.sh)"

groundcover auth login

groundcover deploy --yes

kubectl create namespace production

helm repo add bitnami https://charts.bitnami.com/bitnami

helm repo update

########################
# groundcover Hands-On #
########################

kubectl --namespace groundcover get pods

kubectl --namespace production apply --filename k8s

# Open https://app.groundcover.com in a browser
# Namespace > production

# TODO: Neither the app nor the Namespace is there

kubectl --namespace production get pods

helm upgrade --install postgresql bitnami/postgresql \
    --namespace production --wait

export POSTGRES_PASSWORD_ENCODED=$(kubectl \
    --namespace production get secret postgresql \
    --output jsonpath="{.data.postgres-password}"
)

export POSTGRES_PASSWORD=$(echo $POSTGRES_PASSWORD_ENCODED \
    | base64 --decode
)

echo "
apiVersion: v1
kind: Secret
metadata:
  name: silly-demo
data:
  endpoint: cG9zdGdyZXNxbAo=
  port: NTQzMgo=
  username: cG9zdGdyZXMK
  password: $POSTGRES_PASSWORD_ENCODED
type: Opaque
" | kubectl --namespace production apply --filename -

kubectl --namespace production get pods

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"

kubectl --namespace production run postgresql-client \
    --rm --tty -i --rm --restart='Never' \
    --image docker.io/bitnami/postgresql:15.0.0-debian-11-r3 \
    --env="PGPASSWORD=$POSTGRES_PASSWORD" \
    --command -- psql --host postgresql -U postgres -p 5432

CREATE DATABASE "silly-demo";

\c "silly-demo"

CREATE TABLE videos (
   id text PRIMARY KEY,
   title text
);

exit

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 -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 .

k6 run k6.js

k6 run k6-db.js

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

# Reset of destroy the cluster