226-mtls.sh

# Source: https://gist.github.com/vfarcic/853635e2c8ca52e8f1be2d9c6a6d4d68

#######################################################################
# What Is Mutual TLS (mTLS), Why Do We Need It, And How Do We Get It? #
# https://youtu.be/b38k2GiLDdc                                        #
#######################################################################

# Additional Info:
# - What Is Kubernetes Ingress And How Does It Work?: https://youtu.be/HqTEHVlQpwY

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

# Create a Kubernetes cluster (any should do).

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

cd mtls-demo

kubectl apply --filename namespace.yaml

# Install `linkerd` CLI by following the instructions in
#   https://linkerd.io/2.12/getting-started/#step-1-install-the-cli

linkerd version

# Please make sure that the version is 2.12.x or higher.

linkerd check --pre

linkerd install --crds | kubectl apply --filename -

linkerd install | kubectl apply --filename -

linkerd viz install | kubectl apply --filename -

#####################################
# Applying mTLS With Service Meshes #
#####################################

kubectl --namespace demo apply --kustomize kustomize/base

kubectl --namespace demo run other-app --image alpine \
    --restart Never --rm --stdin --tty -- sh

apk add -U curl

curl "http://silly-demo:8080"

exit

kubectl --namespace demo delete --kustomize kustomize/base

cat namespace-meshed.yaml

kubectl apply --filename namespace-meshed.yaml

kubectl --namespace demo apply --kustomize kustomize/base

kubectl --namespace demo get pods

kubectl --namespace demo run other-app --image alpine \
    -- sleep 100000

# Execute in a separate terminal tab.
linkerd viz edges pod --namespace demo

# Execute in a separate terminal tab.
# Press `Ctrl+C` to stop the `viz` command.

# Execute in a separate terminal tab.
linkerd viz tap pod --namespace demo

kubectl --namespace demo exec --stdin --tty other-app \
    --container other-app -- sh

apk add -U curl

curl "http://silly-demo:8080"

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

exit

# Press `Ctrl+C` in the second terminal tab to stop the `viz`
#   command.

# Reset of destroy the cluster.