Configuration example Kubernetes Ingress with the choice of backend based on the value of the argument "proxy". And the default backend, if the value of the argument "proxy" is different from "1" and "2", or is missing.
manifest.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
name: artem-test-proxy-0-app
namespace: staging
labels:
app: artem-test-proxy-0-app
spec:
replicas: 1
selector:
matchLabels:
app: artem-test-proxy-0-app
strategy:
type: RollingUpdate
progressDeadlineSeconds: 300
minReadySeconds: 60
template:
metadata:
labels:
app: artem-test-proxy-0-app
spec:
containers:
- name: artem-test-proxy-0
image: dockersamples/static-site
env:
- name: AUTHOR
value: Default
ports:
- containerPort: 80
nodeSelector:
nodegroup: staging
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: artem-test-proxy-1-app
namespace: staging
labels:
app: artem-test-proxy-1-app
spec:
replicas: 1
selector:
matchLabels:
app: artem-test-proxy-1-app
strategy:
type: RollingUpdate
progressDeadlineSeconds: 300
minReadySeconds: 60
template:
metadata:
labels:
app: artem-test-proxy-1-app
spec:
containers:
- name: artem-test-proxy-1
image: dockersamples/static-site
env:
- name: AUTHOR
value: Proxy=1
ports:
- containerPort: 80
nodeSelector:
nodegroup: staging
---
apiVersion: apps/v1
kind: Deployment
metadata:
name: artem-test-proxy-2-app
namespace: staging
labels:
app: artem-test-proxy-2-app
spec:
replicas: 1
selector:
matchLabels:
app: artem-test-proxy-2-app
strategy:
type: RollingUpdate
progressDeadlineSeconds: 300
minReadySeconds: 60
template:
metadata:
labels:
app: artem-test-proxy-2-app
spec:
containers:
- name: artem-test-proxy-2
image: dockersamples/static-site
env:
- name: AUTHOR
value: Proxy=2
ports:
- containerPort: 80
nodeSelector:
nodegroup: staging
---
apiVersion: v1
kind: Service
metadata:
name: artem-test-proxy-0-svc
namespace: staging
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: artem-test-proxy-0-app
---
apiVersion: v1
kind: Service
metadata:
name: artem-test-proxy-1-svc
namespace: staging
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: artem-test-proxy-1-app
---
apiVersion: v1
kind: Service
metadata:
name: artem-test-proxy-2-svc
namespace: staging
spec:
ports:
- port: 80
protocol: TCP
targetPort: 80
selector:
app: artem-test-proxy-2-app
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: artem-test-proxy-ing
namespace: staging
annotations:
kubernetes.io/ingress.class: ingress-staging
certmanager.k8s.io/cluster-issuer: letsencrypt-prod
certmanager.k8s.io/acme-challenge-type: dns01
certmanager.k8s.io/acme-dns01-provider: dns
nginx.ingress.kubernetes.io/rewrite-target: /
nginx.ingress.kubernetes.io/configuration-snippet: |
if ($arg_proxy = 1) {
proxy_pass http://artem-test-proxy-1-svc.staging.svc.cluster.local;
}
if ($arg_proxy = 2) {
proxy_pass http://artem-test-proxy-2-svc.staging.svc.cluster.local;
}
spec:
tls:
- hosts:
- artem.services
secretName: artem.services-secret-tls
rules:
- host: artem.services
http:
paths:
- path: /
backend:
serviceName: artem-test-proxy-0-svc
servicePort: 80