Kubernetes : Ingress for url validation route

README.md

Ingress temporary route

Use case : Quickly create a location /loaderio-xxxxxxxx with text response loaderio-xxxxxxxx.

Eg : curl http://clouder.my-domain.io/clouder.my-domain.io must return :

loaderio-xxxxxxxx

Tip

• Create a simple nginx:alpine deployment and live edit default config using kubectle exec -it pod-name-xxx.
• Reload the config by sending au relaod signal : nginx -s reload

Tip

• To avaoid exec in running pod : mount a configMap as a volume at /usr/share/nginx/html on nginx container.

configmap-deployment.yaml

apiVersion: v1
kind: ConfigMap
metadata:
  name: nginx-loaderio
  labels:
    app: nginx-loaderio
data:
  index.html: $LOADERIO_TOKEN
  default.conf: |
    server {
      listen       80;
      location = /loaderio-$LOADERIO_TOKEN {
        return 200 '$LOADERIO_TOKEN';
        add_header Content-Type text/plain;
      }
    }
---
kind: Deployment
apiVersion: apps/v1
metadata:
  name: nginx
  labels:
    k8s-app: nginx
spec:
  replicas: 1
  selector:
    matchLabels:
      k8s-app: nginx
  template:
    metadata:
      name: nginx
      creationTimestamp: null
      labels:
        k8s-app: nginx
    spec:
      volumes:
        - name: nginx-conf-volume
          configMap:
            name: nginx-loaderio    
      containers:
        - name: nginx
          image: 'nginx:alpine'
            - containerPort: 80
          volumeMounts:
            - name: nginx-conf-volume
              mountPath: /etc/nginx/conf.d

ingress-service.yaml

apiVersion: extensions/v1beta1
kind: Ingress
metadata:
  labels:
    k8s-app: nginx
  name: nginx
spec:
  rules:
  - host: my-domain.org
    http:
      paths:
      - backend: 
          serviceName: nginx
          servicePort: tcp-80
          path: /loaderio-${LOADERIO_TOKEN}$
---

kind: Service
apiVersion: v1
metadata:
  name: nginx
  labels:
    k8s-app: nginx
spec:
  ports:
    - name: tcp-80
      port: 80
      targetPort: 80
  selector:
    k8s-app: nginx
          

Execute :

1. Substitute env var token
2. Kbectl apply configuration

LOADERIO_TOKEN=xxxxxx envsubst < nginx-loader-io.yaml | k apply -n loader -f -