LAB_7.2 ingress-nginx-controller-admission not found
ubuntu@controlPlane:~$
ubuntu@controlPlane:~$
ubuntu@controlPlane:~$ kubectl create -f ingress.yaml
Error from server (InternalError): error when creating "ingress.yaml": Internal error occurred: failed calling webhook "validate.nginx.ingress.kubernetes.io": failed to call webhook: Post "https://ingress-nginx-controller-admission.ingress-nginx.svc:443/networking/v1/ingresses?timeout=10s": service "ingress-nginx-controller-admission" not found
ubuntu@controlPlane:~$
ubuntu@controlPlane:~$
ubuntu@controlPlane:~$ kubectl get ingress --all-namespaces
No resources found
ubuntu@controlPlane:~$
ubuntu@controlPlane:~$
ubuntu@controlPlane:~$ kubectl --namespace default get services -o wide myingress-ingress-nginx-controller
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
myingress-ingress-nginx-controller LoadBalancer 10.106.16.160 80:30824/TCP,443:32340/TCP 5m54s app.kubernetes.io/component=controller,app.kubernetes.io/instance=myingress,app.kubernetes.io/name=ingress-nginx
ubuntu@controlPlane:~$
ubuntu@controlPlane:~$
ubuntu@controlPlane:~$ kubectl get pod --all-namespaces |grep nginx
default myingress-ingress-nginx-controller-cxj55 1/1 Running 0 6m5s
default myingress-ingress-nginx-controller-fkwrc 1/1 Running 0 6m5s
ubuntu@controlPlane:~$
ubuntu@controlPlane:~$
Comments
-
kubectl get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
controlplane Ready control-plane 13d v1.29.1 10.19.107.197 Ubuntu 20.04.6 LTS 5.4.0-173-generic containerd://1.6.28
worker Ready 13d v1.29.1 10.19.107.156 Ubuntu 20.04.6 LTS 5.4.0-173-generic containerd://1.6.280 -
myingress vs ingress ?
kubectl get ingressclasses.networking.k8s.io nginx -o yaml
apiVersion: networking.k8s.io/v1
kind: IngressClass
metadata:
annotations:
meta.helm.sh/release-name: myingress
meta.helm.sh/release-namespace: default
creationTimestamp: "2024-03-14T23:26:50Z"
generation: 1
labels:
app.kubernetes.io/component: controller
app.kubernetes.io/instance: myingress
app.kubernetes.io/managed-by: Helm
app.kubernetes.io/name: ingress-nginx
app.kubernetes.io/part-of: ingress-nginx
app.kubernetes.io/version: 1.10.0
helm.sh/chart: ingress-nginx-4.10.0
name: nginx
resourceVersion: "645062"
uid: 0784e1a8-a5c7-466b-bd76-9a20dc3239cd
spec:
controller: k8s.io/ingress-nginx0 -
kubectl --namespace default get services -o wide myingress-ingress-nginx-controller myingress-ingress-nginx-controller-admission
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
myingress-ingress-nginx-controller LoadBalancer 10.106.16.160 80:30824/TCP,443:32340/TCP 14h app.kubernetes.io/component=controller,app.kubernetes.io/instance=myingress,app.kubernetes.io/name=ingress-nginx
myingress-ingress-nginx-controller-admission ClusterIP 10.98.138.176 443/TCP 14h app.kubernetes.io/component=controller,app.kubernetes.io/instance=myingress,app.kubernetes.io/name=ingress-nginx0 -
Hi @eg8888,
Asking a clear question would be helpful. However, based only on the outputs provided, without any explanation, one may only guess that your myingress-ingress-nginx-controller-admission service cannot be reached.
Perhaps there is a network policy that blocks access to TCP port 8443 of your myingress-ingress-nginx-controller pods?Regards,
-Chris0 -
hi @chrispokorni,
context is "LAB_7.2 ingress-nginx-controller-admission not found"
with the error:
- Error from server (InternalError): error when creating "ingress.yaml": Internal error occurred: failed calling webhook "validate.nginx.ingress.kubernetes.io": failed to call webhook: Post "https://ingress-nginx-controller-admission.ingress-nginx.svc:443/networking/v1/ingresses?timeout=10s": service "ingress-nginx-controller-admission" not found
it's supposed to connect to?:
ingress-nginx-controller-admission
ormyingress-ingress-nginx-controller-admission
kubectl exec -it secondapp -c busy -- sh
~ $
~ $ nc -vz myingress-ingress-nginx-controller-admission 443
myingress-ingress-nginx-controller-admission (10.98.138.176:443) open
~ $
~ $ nc -vz myingress-ingress-nginx-controller 443
myingress-ingress-nginx-controller (10.106.16.160:443) open
~ $
~ $ exitfor situations like this, what's the best way to investigate, debug?
0 -
Hi @eg8888,
Per my comment:
Perhaps there is a network policy that blocks access to TCP port 8443 of your myingress-ingress-nginx-controller pods?
For this, would you be able to check if the network policy from exercise 6.5 is still operational? The timeout on the myingress-ingress-nginx-controller-admission service could suggest that traffic is blocked from reaching the myingress-ingress-nginx-controller pods.
The service is there, the pods are running, the service displays endpoints, conditions that otherwise suffice for traffic to reach the desired pods. However, considering that we deployed a network policy in the earlier exercise 6.5, that could block traffic to the myingress-ingress-nginx-controller pods.
Regards,
-Chris0 -
ubuntu@controlPlane:~$ kubectl get networkpolicies.networking.k8s.io
No resources found in default namespace.
ubuntu@controlPlane:~$ubuntu@controlPlane:~$ kubectl exec -it secondapp -c busy -- sh
~ $
~ $ nc -vz ingress-ingress-nginx-controller-admission 8443
nc: bad address 'ingress-ingress-nginx-controller-admission'
~ $
~ $ nc -vz ingress-ingress-nginx-controller 8443
nc: bad address 'ingress-ingress-nginx-controller'
~ $
~ $
~ $ nc -vz myingress-ingress-nginx-controller-admission 8443
~ $
~ $ nc -vz myingress-ingress-nginx-controller 8443
~ $~ $
~ $nslookup
ingress-ingress-nginx-controller-admission
Server: 10.96.0.10
Address: 10.96.0.10:53** server can't find ingress-ingress-nginx-controller-admission.default.svc.cluster.local: NXDOMAIN
** server can't find ingress-ingress-nginx-controller-admission.default.svc.cluster.local: NXDOMAIN
** server can't find ingress-ingress-nginx-controller-admission.svc.cluster.local: NXDOMAIN
** server can't find ingress-ingress-nginx-controller-admission.cluster.local: NXDOMAIN
** server can't find ingress-ingress-nginx-controller-admission.multipass: NXDOMAIN
** server can't find ingress-ingress-nginx-controller-admission.multipass: NXDOMAIN
** server can't find ingress-ingress-nginx-controller-admission.svc.cluster.local: NXDOMAIN
** server can't find ingress-ingress-nginx-controller-admission.cluster.local: NXDOMAIN
~ $
nslookup
ingress-ingress-nginx-controller
Server: 10.96.0.10
Address: 10.96.0.10:53** server can't find ingress-ingress-nginx-controller.svc.cluster.local: NXDOMAIN
** server can't find ingress-ingress-nginx-controller.default.svc.cluster.local: NXDOMAIN
** server can't find ingress-ingress-nginx-controller.cluster.local: NXDOMAIN
** server can't find ingress-ingress-nginx-controller.default.svc.cluster.local: NXDOMAIN
** server can't find ingress-ingress-nginx-controller.svc.cluster.local: NXDOMAIN
** server can't find ingress-ingress-nginx-controller.cluster.local: NXDOMAIN
** server can't find ingress-ingress-nginx-controller.multipass: NXDOMAIN
** server can't find ingress-ingress-nginx-controller.multipass: NXDOMAIN
~ $
nslookup
myingress-ingress-nginx-controller-admission
Server: 10.96.0.10
Address: 10.96.0.10:53Name: myingress-ingress-nginx-controller-admission.default.svc.cluster.local
Address: 10.98.138.176** server can't find myingress-ingress-nginx-controller-admission.svc.cluster.local: NXDOMAIN
** server can't find myingress-ingress-nginx-controller-admission.svc.cluster.local: NXDOMAIN
** server can't find myingress-ingress-nginx-controller-admission.cluster.local: NXDOMAIN
** server can't find myingress-ingress-nginx-controller-admission.cluster.local: NXDOMAIN
** server can't find myingress-ingress-nginx-controller-admission.multipass: NXDOMAIN
** server can't find myingress-ingress-nginx-controller-admission.multipass: NXDOMAIN
~ $
nslookup
myingress-ingress-nginx-controller
Server: 10.96.0.10
Address: 10.96.0.10:53** server can't find myingress-ingress-nginx-controller.svc.cluster.local: NXDOMAIN
** server can't find myingress-ingress-nginx-controller.cluster.local: NXDOMAIN
Name: myingress-ingress-nginx-controller.default.svc.cluster.local
Address: 10.106.16.160** server can't find myingress-ingress-nginx-controller.svc.cluster.local: NXDOMAIN
** server can't find myingress-ingress-nginx-controller.multipass: NXDOMAIN
** server can't find myingress-ingress-nginx-controller.multipass: NXDOMAIN
** server can't find myingress-ingress-nginx-controller.cluster.local: NXDOMAIN
~ $
0 -
Hi @eg8888,
You seem to have bigger problems, since your DNS does not work.
Please provide the outputs of the following:
kubectl -n kube-system get pods -o wide kubectl -n kube-system get cm coredns -o yaml
Regards,
-Chris0 -
ubuntu@controlPlane:~$ kubectl -n kube-system get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
cilium-2vlw4 1/1 Running 6 (3h38m ago) 14d 10.19.107.156 worker
cilium-mc9p4 1/1 Running 6 (3h38m ago) 14d 10.19.107.197 controlplane
cilium-operator-5cddcb98d5-6drp8 1/1 Running 6 (3h38m ago) 14d 10.19.107.197 controlplane
coredns-76f75df574-7hrqn 1/1 Running 6 (3h38m ago) 14d 10.0.0.201 controlplane
coredns-76f75df574-dn2hr 1/1 Running 6 (3h38m ago) 14d 10.0.0.48 controlplane
etcd-controlplane 1/1 Running 6 (3h38m ago) 14d 10.19.107.197 controlplane
kube-apiserver-controlplane 1/1 Running 6 (3h38m ago) 14d 10.19.107.197 controlplane
kube-controller-manager-controlplane 1/1 Running 6 (3h38m ago) 14d 10.19.107.197 controlplane
kube-proxy-hdc2c 1/1 Running 6 (3h38m ago) 14d 10.19.107.197 controlplane
kube-proxy-pj5kn 1/1 Running 6 (3h38m ago) 14d 10.19.107.156 worker
kube-scheduler-controlplane 1/1 Running 6 (3h38m ago) 14d 10.19.107.197 controlplaneubuntu@controlPlane:~$ kubectl -n kube-system get cm coredns -o yaml
apiVersion: v1
data:
Corefile: |
.:53 {
errors
health {
lameduck 5s
}
ready
kubernetes cluster.local in-addr.arpa ip6.arpa {
pods insecure
fallthrough in-addr.arpa ip6.arpa
ttl 30
}
prometheus :9153
forward . /etc/resolv.conf {
max_concurrent 1000
}
cache 30
loop
reload
loadbalance
}
kind: ConfigMap
metadata:
creationTimestamp: "2024-03-01T16:12:56Z"
name: coredns
namespace: kube-system
resourceVersion: "254"
uid: 66dbe4c3-9a27-4e23-a466-4fe9b55f4795
ubuntu@controlPlane:~$
0
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