deploy-using-helm

Setup in traefik as ingress controller using yaml

This approach will configure Traefik as ingress using yaml files.

References:

Configuring Traefik ingress

References:

If you are using minikube, confirm that ingress addon is enabled
```
 minikube addons enable ingress
```
Create a namespace to run the deployments
```
 kubectl create namespace traefik-yaml
```

Deploy the app in the namespace.

 helm install tr-webapp ./tr-webapp --namespace traefik-yaml

Three yaml files are required to configure the ingress access:

rbac.yaml:

 ---
 kind: ClusterRole
 apiVersion: rbac.authorization.k8s.io/v1beta1
 metadata:
 name: traefik-ingress-controller
 rules:
 - apiGroups:
     - ""
     resources:
     - services
     - endpoints
     - secrets
     verbs:
     - get
     - list
     - watch
 - apiGroups:
     - extensions
     - networking.k8s.io
     resources:
     - ingresses
     - ingressclasses
     verbs:
     - get
     - list
     - watch
 - apiGroups:
     - extensions
     resources:
     - ingresses/status
     verbs:
     - update

 ---
 kind: ClusterRoleBinding
 apiVersion: rbac.authorization.k8s.io/v1beta1
 metadata:
 name: traefik-ingress-controller
 roleRef:
 apiGroup: rbac.authorization.k8s.io
 kind: ClusterRole
 name: traefik-ingress-controller
 subjects:
 - kind: ServiceAccount
     name: traefik-ingress-controller
     namespace: default

traefik.yaml:

 apiVersion: v1
 kind: ServiceAccount
 metadata:
 name: traefik-ingress-controller

 ---
 kind: Deployment
 apiVersion: apps/v1
 metadata:
 name: traefik
 labels:
     app: traefik

 spec:
 replicas: 1
 selector:
     matchLabels:
     app: traefik
 template:
     metadata:
     labels:
         app: traefik
     spec:
     serviceAccountName: traefik-ingress-controller
     containers:
         - name: traefik
         image: traefik:v2.3
         args:
             - --entrypoints.web.address=:80
             - --providers.kubernetesingress
         ports:
             - name: web
             containerPort: 80

 ---
 apiVersion: v1
 kind: Service
 metadata:
 name: traefik
 spec:
 type: LoadBalancer
 selector:
     app: traefik
 ports:
     - protocol: TCP
     port: 80
     name: web
     targetPort: 80

ingress.yaml:

 kind: Ingress
 apiVersion: networking.k8s.io/v1beta1
 metadata:
 name: myingress
 annotations:
     traefik.ingress.kubernetes.io/router.entrypoints: web

 spec:
 rules:
     - host: hello-world.traefik-yaml
     http:
         paths:
         - path: /
             backend:
             serviceName: tr-webapp
             servicePort: 8080

Apply the files:

 [roberto@vmlab01 traefik-yaml]$ kubectl apply -f rbac.yaml --namespace traefik-yaml

 Warning: rbac.authorization.k8s.io/v1beta1 ClusterRole is deprecated in v1.17+, unavailable in v1.22+; use rbac.authorization.k8s.io/v1 ClusterRole
 clusterrole.rbac.authorization.k8s.io/traefik-ingress-controller unchanged
 Warning: rbac.authorization.k8s.io/v1beta1 ClusterRoleBinding is deprecated in v1.17+, unavailable in v1.22+; use rbac.authorization.k8s.io/v1 ClusterRoleBinding
 clusterrolebinding.rbac.authorization.k8s.io/traefik-ingress-controller unchanged

 [roberto@vmlab01 traefik-yaml]$ kubectl apply -f traefik.yaml --namespace traefik-yaml

 serviceaccount/traefik-ingress-controller created
 deployment.apps/traefik created
 service/traefik created

 [roberto@vmlab01 traefik-yaml]$ kubectl apply -f ingress.yaml --namespace traefik-yaml
 Warning: networking.k8s.io/v1beta1 Ingress is deprecated in v1.19+, unavailable in v1.22+; use networking.k8s.io/v1 Ingress
 ingress.networking.k8s.io/myingress created

Check service and ingress resources

 [roberto@vmlab01 traefik-yaml]$ kubectl get svc --namespace traefik-yaml
 NAME        TYPE           CLUSTER-IP       EXTERNAL-IP   PORT(S)          AGE
 tr-webapp   NodePort       10.101.197.48    <none>        8080:31808/TCP   17m
 traefik     LoadBalancer   10.103.172.100   <pending>     80:30320/TCP     11m

 [roberto@vmlab01 traefik-yaml]$ kubectl get ingress --namespace traefik-yaml
 NAME        CLASS    HOSTS                      ADDRESS        PORTS   AGE
 myingress   <none>   hello-world.traefik-yaml   192.168.49.2   80      10m

(you should wait a few seconds until “ADDRESS” list an IP address for the ingress resource)

Create a static entry in /etc/hosts to point to the new hostname hello-world.trafik-yaml
```
 sudo echo "192.168.49.2 hello-world.traefik-yaml" >> /etc/hosts
```

Now you should be able to access the url:

 [roberto@vmlab01 traefik-yaml]$ curl hello-world.traefik-yaml
 Hello World