Minikube Ingress Does not resolve but minikube IP does - nginx

I am running a simple pod with an image from local image registry in a minikube cluster on Windows 10. I am also running a simple nodeport service. The container is available when I try accessing it from the browser with <minikube_ip>:30080.
However, now I want to set an ingress controller because I want to set up a domain and not access it using the IP. The ingress works for something simple like a basic nginx pod, but does not work for this pod that I'm trying to use. I was previously using jwilder/nginx-proxy in docker-compose and it had some conf files that needed to be attached in the conf.d directory. However, since I am moving to Kubernetes, I thought to totally omit the conf files and the reverse proxy image.
Now after the hosts fie is updated, the domain is reachable via curl, the domain is also pingable, however, it simply cannot be reached on the browser.
pod-yaml:
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
io.kompose.service: api
name: api
spec:
replicas: 1
selector:
matchLabels:
io.kompose.service: api
strategy:
type: RollingUpdate
template:
metadata:
labels:
io.kompose.service: api
spec:
containers:
- env:
- name: DEV_PORT
value: "80"
image: localhost:5000/api:2.3
imagePullPolicy: "IfNotPresent"
name: api
resources: {}
restartPolicy: Always
serviceAccountName: ""
status: {}
Service.yaml
apiVersion: v1
kind: Service
metadata:
annotations:
kompose.cmd: C:\Users\***kompose.exe
convert
kompose.version: 1.21.0 (992df58d8)
creationTimestamp: null
labels:
io.kompose.service: api
name: api
spec:
selector:
io.kompose.service: api
type: NodePort
ports:
- name: "http"
port: 80
targetPort: 80
nodePort: 30080
Ingress.yaml
apiVersion: networking.k8s.io/v1beta1 # for versions before 1.14 use extensions/v1beta1
kind: Ingress
metadata:
name: tls-ingress
spec:
tls:
- secretName: oaky-tls
hosts:
- api.localhost
rules:
- host: api.localhost
http:
paths:
- path: /
backend:
serviceName: api
servicePort: 80
I have checked and the TLS secret is available, I am not understanding the issue here and would really appreciate some help.

Solved:
Chrome was overlooking the etc hosts file, so I did the following:
Switched to Firefox and instantly the URLs were working.
Added annotations to denote the class:
kubernetes.io/ingress.class: nginx
Added annotations to make sure requests are redirected to ssl
nginx.ingress.kubernetes.io/ssl-redirect: "true"

Related

Problem with NGINX, Kubernetes and CloudFlare

I am experiencing exactly this issue: Nginx-ingress-controller fails to start after AKS upgrade to v1.22, with the exception that none of the proposed solutions is working for my case.
I am running a Kubernetes Cluster on Oracle Cloud and I accidentally upgraded the cluster and now I cannot connect anymore to the services through nginx-controller. After reading the official nginx documentation, I am aware of the new version of nginx, so I checked the documentation and re-installed the nginx-controller following Oracle Cloud official documentation.
I am able to perform step by step as I run:
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/controller-v0.44.0/deploy/static/provider/cloud/deploy.yaml
And then an ingress-nginx namespace is created and a LoadBalancer is created. Then as in the guide I have created a simple hello application (though not running on port 80):
apiVersion: apps/v1
kind: Deployment
metadata:
name: docker-hello-world
labels:
app: docker-hello-world
spec:
selector:
matchLabels:
app: docker-hello-world
replicas: 1
template:
metadata:
labels:
app: docker-hello-world
spec:
containers:
- name: docker-hello-world
image: scottsbaldwin/docker-hello-world:latest
ports:
- containerPort: 8088
---
apiVersion: v1
kind: Service
metadata:
name: docker-hello-world-svc
spec:
selector:
app: docker-hello-world
ports:
- port: 8088
targetPort: 8088
type: ClusterIP
and then the ingress
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: hello-world-ing
annotations:
kubernetes.io/ingress.class: "nginx"
spec:
tls:
- secretName: tls-secret
rules:
- http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: docker-hello-world-svc
port:
number: 8088
But when running the curl commands I only get a curl: (56) Recv failure: Connection reset by peer.
So I then tried to connect to some python microservices that are already running by simply editing the ingress, but whatever I do I get the same error message. And when setting the host as the following:
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: hello-world-ing
namespace: ingress-nginx
annotations:
kubernetes.io/ingress.class: "nginx"
spec:
rules:
- host: SUBDOMAIN.DOMAIN.com
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: ANY_MICROSERVICE_RUNNING_IN_CLUSTER
port:
number: EXPOSED_PORT_BY_MICROSERVICE
Then, by setting the subdomain on CloudFlare I only get a 520 Bad Gateway.
Can you help me find what is that I do not see?
This may be related to your Ingress resource.
In Kubernetes versions v1.19 and above, Ingress resources should use ingressClassName instead of the older annotation syntax. Additional information on what should be done when upgrading can be found on the official Kubernetes documentation.
However, with the changes it requires at face value, from the information you're provided so far, your Ingress resource should look this:
---
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: hello-world-ing
spec:
ingressClassName: nginx
rules:
- host: SUBDOMAIN.DOMAIN.com
http:
paths:
- backend:
service:
name: docker-hello-world-svc
port:
number: 8088
path: /
pathType: Prefix
tls:
- hosts:
- SUBDOMAIN.DOMAIN.com
secretName: tls-secret
Additionally, please provide the deployment Nginx-ingress logs if you still have issues, as the Cloudflare error does not detail what could be wrong apart from providing a starting point.
As someone who uses Cloudflare and Nginx, there are multiple reasons why you're receiving a 520 error, so it'd be better if we could reduce the scope of what could be the main issue. Let me know if you have any questions.

How to setup an ingress controller for kubernetes?

Sorry I am new with Kubernetes and everything...
I have a java back-end in a clusterIP service and a front-end in a NodePort service. I try to make a request to the backend from the front (from the navigator) and it doesn't work.
I saw that I needed to setup an ingress crontroller in order to make it work, but each time I do a "minikube tunnel" and go to my localhost, I get a NGINX 404 error. And the address http://toto.virtualisation doesn't work too (like it doesn't exist).
Here is the setup of my front and my ingress controller in my yaml file :
# Front Deployment
apiVersion: apps/v1
kind: Deployment
metadata:
name: front-end-deployment
spec:
selector:
matchLabels:
app: front-end
template:
metadata:
labels:
app: front-end
spec:
containers:
- name: front-end-container
image: oxasa/front-end-image:latest
---
# Front Service
apiVersion: v1
kind: Service
metadata:
name: front-end-service
spec:
ports:
- name: http
targetPort: 80
port: 80
type: NodePort
selector:
app: front-end
---
# Front Ingress
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
name: front-end-ingress
spec:
rules:
- host: toto.virtualisation
http:
paths:
- path: /
pathType: Prefix
backend:
service:
name: front-end-service
port:
number: 80
If you see anything that needs to be done to make it work...
Try adding
spec:
ingressClassName: nginx
To the Ingress resource to ensure nginx picks up the created ingress.
Also Ingress is not required for service to service Communication. You can use the Kubernetes internal DNS from your Frontend service.
You can make the Frontend access backend by using sth like {service-name}.{namespace}.svc.cluster.local

Loadbalancing/Redirecting from Kubernetes NodePort Services

i got a bare metal cluster with a few nodeport deployments of my services (http and https). I would like to access them from a single url like myservices.local with (sub)paths.
config could be sth like the following (pseudo code):
/app1
http://10.100.22.55:30322
http://10.100.22.56:30322
# browser access: myservices.local/app1
/app2
https://10.100.22.55:31432
https://10.100.22.56:31432
# browser access: myservices.local/app2
/...
I tried a few things with haproxy and nginx but nothing really worked (for inexperienced in this webserver/lb things kinda confusing syntax/ config style in my opinion).
what is the easiest solution for a case like this?
The easiest and most used way is to use a NGINX Ingress. The NGINX Ingress is built around the Kubernetes Ingress resource, using a ConfigMap to store the NGINX configuration.
In the documentation we can read:
Ingress exposes HTTP and HTTPS routes from outside the cluster to services within the cluster. Traffic routing is controlled by rules defined on the Ingress resource.
internet
|
[ Ingress ]
--|-----|--
[ Services ]
An Ingress may be configured to give Services externally-reachable URLs, load balance traffic, terminate SSL / TLS, and offer name based virtual hosting. An Ingress controller is responsible for fulfilling the Ingress, usually with a load balancer, though it may also configure your edge router or additional frontends to help handle the traffic.
An Ingress does not expose arbitrary ports or protocols. Exposing services other than HTTP and HTTPS to the internet typically uses a service of type Service.Type=NodePort or Service.Type=LoadBalancer.
This is exactly what you want to achieve.
The first thing you need to do is to install the NGINX Ingress Controller in your cluster. You can follow the official Installation Guide.
A ingress is always going to point to a Service. So you need to have a Deployment, a Service and a NGINX Ingress.
Here is an example of an application similar to your example.
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: app1
name: app1
spec:
replicas: 1
selector:
matchLabels:
app: app1
strategy:
type: Recreate
template:
metadata:
labels:
app: app1
spec:
containers:
- name: app1
image: nginx
imagePullPolicy: Always
ports:
- containerPort: 5000
---
apiVersion: apps/v1
kind: Deployment
metadata:
labels:
app: app2
name: app2
spec:
replicas: 1
selector:
matchLabels:
app: app2
strategy:
type: Recreate
template:
metadata:
labels:
app: app2
spec:
containers:
- name: app2
image: nginx
imagePullPolicy: Always
ports:
- containerPort: 5001
---
apiVersion: v1
kind: Service
metadata:
name: app1
labels:
app: app1
spec:
type: ClusterIP
ports:
- port: 5000
protocol: TCP
targetPort: 5000
selector:
app: app1
---
apiVersion: v1
kind: Service
metadata:
name: app2
labels:
app: app2
spec:
type: ClusterIP
ports:
- port: 5001
protocol: TCP
targetPort: 5001
selector:
app: app2
---
apiVersion: networking.k8s.io/v1beta1
kind: Ingress #ingress resource
metadata:
name: myservices
labels:
app: myservices
spec:
rules:
- host: myservices.local #only match connections to myservices.local.
http:
paths:
- path: /app1
backend:
serviceName: app1
servicePort: 5000
- path: /app2
backend:
serviceName: app2
servicePort: 5001

K8S baremetal nginx ingress controller not works

I encountered a problem when integrating K8S nginx ingress. I installed the nginx ingress controller and established the testing ingress resources according to the instructions on the document, but I was not able to jump to the normal path. The test serive was normal and Accessible via cluster IP. Am I missing something?
Install script
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/static/mandatory.yaml
Bare-metal Using NodePort
kubectl apply -f https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/static/provider/baremetal/service-nodeport.yaml
Ingress controller is OK
Testing ingress resource
apiVersion: apps/v1
kind: Deployment
metadata:
name: my-nginx
spec:
selector:
matchLabels:
app: my-nginx
template:
metadata:
labels:
app: my-nginx
spec:
containers:
- name: my-nginx
image: nginx:latest
ports:
- containerPort: 80
---
apiVersion: v1
kind: Service
metadata:
name: my-nginx
labels:
app: my-nginx
spec:
ports:
- port: 80
protocol: TCP
name: http
selector:
app: my-nginx
---
apiVersion: extensions/v1beta1
kind: Ingress
metadata:
name: my-nginx
annotations:
kubernetes.io/ingress.class: "nginx"
spec:
rules:
- host: nginx1.beencoding.com
http:
paths:
- path: /
backend:
serviceName: nginx-1
servicePort: 80
We can see the test nginx pod raised and works fine, I can access the nginx index page by cluster IP
But I can't access nginx1.beencoding.com
Can't access via browser
I have solved the problem by setting hostnetwork: true
It says can't resolve.
Either put the domain in /etc/hosts/ file, or do the curl as follows:
curl -H "Host: nginx1.beecoding.com" IP_ADDRESS
Should work.

Kubernetes nginx ingress is not resolving services

Cloud: Google Cloud Platform.
I have the following configuration
kind: Deployment
apiVersion: apps/v1
metadata:
name: api
spec:
replicas: 2
selector:
matchLabels:
run: api
template:
metadata:
labels:
run: api
spec:
containers:
- name: api
image: gcr.io/*************/api
ports:
- containerPort: 8080
livenessProbe:
httpGet:
path: /_ah/health
port: 8080
initialDelaySeconds: 10
periodSeconds: 5
---
kind: Service
apiVersion: v1
metadata:
name: api
spec:
selector:
run: api
type: NodePort
ports:
- protocol: TCP
port: 8080
targetPort: 8080
---
kind: Ingress
apiVersion: extensions/v1beta1
metadata:
name: main-ingress
annotations:
kubernetes.io/ingress.class: nginx
spec:
rules:
- http:
paths:
- path: /api/*
backend:
serviceName: api
servicePort: 8080
All set. GKE saying that all deployments are okay, pods number are met and main ingress with nginx-ingress-controllers are set as well. But I'm not able to reach any of the services. Even application specific 404. Nothing. Like, it's not resolved at all.
Another related question I see to entrypoints. The first one through main-ingress. It created it's own LoadBalancer with own IP address. The second one address from nginx-ingress-controller. The second one is at least returning 404 from default backend, but also not pointing to expected api service.

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