Skip to content

Instantly share code, notes, and snippets.

@vfarcic

vfarcic/03-ingress.sh

Last active March 29, 2024 10:28
Show Gist options
  • Save vfarcic/801c99d6acc5a1e68bcee2591fac90eb to your computer and use it in GitHub Desktop.
Save vfarcic/801c99d6acc5a1e68bcee2591fac90eb to your computer and use it in GitHub Desktop.
Download ZIP
Raw
03-ingress.sh
# Source: https://gist.github.com/801c99d6acc5a1e68bcee2591fac90eb
####################
# Creating Cluster #
####################
# Docker for Desktop: https://gist.github.com/33fd661da626a167687ecb4267700588
# minikube: https://gist.github.com/e7ad0cc633831147d2dbcd4fe2a97a74
# GKE: https://gist.github.com/a260c0812459a57b46b9ea807a26173e
# EKS: https://gist.github.com/073edd549bc0c4d9bda6b4b7bd6bed99
# AKS: https://gist.github.com/c288e9a8dd45ce855d477d1780d2d2e1
# NOTE: We removed Istio in the previous section, so we need to install it even if you did not destroy the cluster
istioctl manifest install \
--set profile=demo
#################
# Using Gateway #
#################
# Open https://github.com/vfarcic/go-demo-7
# Fork it
GH_USER=[...]
git clone \
https://github.com/$GH_USER/go-demo-7.git
cd go-demo-7
git pull
ls -1 k8s/istio/gateway/
ls -1 k8s/istio/gateway/app
cat k8s/istio/gateway/app/istio.yaml
kubectl create namespace go-demo-7
kubectl label namespace go-demo-7 \
istio-injection=enabled
kubectl --namespace go-demo-7 apply \
--filename k8s/istio/gateway \
--recursive
kubectl --namespace go-demo-7 \
rollout status \
deployment go-demo-7-primary
kubectl --namespace go-demo-7 \
get pods
kubectl --namespace go-demo-7 \
get virtualservices
kubectl --namespace go-demo-7 \
describe virtualservice go-demo-7
kubectl run curl \
--image alpine \
-it --rm \
-- sh -c "apk add -U curl && curl go-demo-7.go-demo-7/demo/hello"
kubectl --namespace go-demo-7 \
get ingress
kubectl --namespace go-demo-7 \
get gateways
kubectl --namespace go-demo-7 \
describe gateway go-demo-7
# If minikube
export INGRESS_PORT=$(kubectl \
--namespace istio-system \
get service istio-ingressgateway \
--output jsonpath='{.spec.ports[?(@.name=="http2")].nodePort}')
# If minikube
export INGRESS_HOST=$(minikube ip):$INGRESS_PORT
# If Docker Desktop
export INGRESS_HOST=127.0.0.1
# If EKS
export INGRESS_HOST=$(kubectl \
--namespace istio-system \
get service istio-ingressgateway \
--output jsonpath="{.status.loadBalancer.ingress[0].hostname}")
# If GKE or AKS (NOT minikube and NOT Docker Desktop and NOT EKS)
export INGRESS_HOST=$(kubectl \
--namespace istio-system \
get service istio-ingressgateway \
--output jsonpath="{.status.loadBalancer.ingress[0].ip}")
echo $INGRESS_HOST
curl -v -H "Host: go-demo-7.acme.com" \
"http://$INGRESS_HOST/demo/hello"
curl -v -H "Host: something-else.acme.com" \
"http://$INGRESS_HOST/demo/hello"
kubectl --namespace go-demo-7 delete \
--filename k8s/istio/gateway \
--recursive
#################
# Using Ingress #
#################
istioctl profile dump demo
istioctl manifest install \
--set values.global.k8sIngress.enabled=true
ls -1 k8s/istio/ingress/app
cat k8s/istio/ingress/app/ingress.yaml
kubectl --namespace go-demo-7 apply \
--filename k8s/istio/ingress/ \
--recursive
# If `no matches for kind "Ingress" in version "networking.k8s.io/v1beta1"`, upgrade Kubernetes to 1.14+
kubectl --namespace go-demo-7 \
rollout status \
deployment go-demo-7-primary
curl -H "Host: go-demo-7.acme.com" \
"http://$INGRESS_HOST/demo/hello"
kubectl --namespace go-demo-7 delete \
--filename k8s/istio/ingress \
--recursive
##############
# References #
##############
# https://istio.io/docs/reference/config/networking/gateway/
###############
# Cleaning Up #
###############
cd ..
kubectl delete namespace go-demo-7
# Destroy the cluster (optional)
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment