Lab 8.3 step 4 failed. Do I miss something?

zhangwe

I use kubectl -n accounting describe services
NodePort: 30731/TCP

student@master:~$ kubectl cluster-info
Kubernetes master is running at https://k8smaster:6443
KubeDNS is running at https://k8smaster:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy

curl http://k8smaster:30731
curl: (7) Failed to connect to k8smaster port 30731: Connection refused

serewicz

Hello,

Thank you for the additional information. You did not follow Ex 8.1, step 13 properly. The step says to expose port 80 and create the deployment again. From your output, notice the last two lines I have quoted:

Ex 8.2, step 2
student@master:~$ kubectl -n accounting describe services
Name: service-lab
Namespace: accounting
Labels: system=secondary
Annotations:
Selector: system=secondary
Type: NodePort
IP: 10.97.208.233
Port: 8088/TCP
TargetPort: 8088/TCP

The traffic is being sent to 8088 instead of port 80.

Once the deployment has the port set to 80 you should be able to curl the pod IP, the ClusterIP, and then the NodePort. That is the order I would troubleshoot after the edit.

Regards,

serewicz

Hello,

I show Exercise 8.3, step 4 to be a delete command. I think you mean Exercise 8.2.

Either the service is not running, or the pod is not running. What was the output of Ex 8.1, step 13 and Ex 8.2, step 1?

If you run kubectl get pod -o wide --all-namespaces

Does it show the nginx pod is running and in a 1/1 Ready status?

Regards,

zhangwe

Here is the information:

Ex 8.1, step 13
student@master:~$ kubectl -n accounting get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-one-79c56b47b9-7tcxj 1/1 Running 0 8m 192.168.171.111 worker
nginx-one-79c56b47b9-8z57b 1/1 Running 0 8m 192.168.171.112 worker

Ex 8.2, step 1
student@master:~$ kubectl -n accounting expose deployment \

nginx-one --type=NodePort --name=service-lab

service/service-lab exposed
student@master:~$ kubectl get pod -o wide --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
accounting nginx-one-79c56b47b9-7tcxj 1/1 Running 0 14m 192.168.171.111 worker
accounting nginx-one-79c56b47b9-8z57b 1/1 Running 0 14m 192.168.171.112 worker
kube-system calico-kube-controllers-578894d4cd-crfg6 1/1 Running 5 4d17h 192.168.219.110 master
kube-system calico-node-2kpx2 1/1 Running 5 4d17h 10.142.0.5 master
kube-system calico-node-krnsk 1/1 Running 5 4d17h 10.142.0.6 worker
kube-system coredns-66bff467f8-fxdxf 1/1 Running 4 3d11h 192.168.219.108 master
kube-system coredns-66bff467f8-spj2s 1/1 Running 5 4d16h 192.168.219.109 master
kube-system etcd-master 1/1 Running 5 4d17h 10.142.0.5 master
kube-system kube-apiserver-master 1/1 Running 5 4d17h 10.142.0.5 master
kube-system kube-controller-manager-master 1/1 Running 5 4d17h 10.142.0.5 master
kube-system kube-proxy-7r5dx 1/1 Running 5 4d17h 10.142.0.6 worker
kube-system kube-proxy-lms4p 1/1 Running 5 4d17h 10.142.0.5 master
kube-system kube-scheduler-master 1/1 Running 5 4d17h 10.142.0.5 master
low-usage-limit limited-hog-d9d756c45-76t8s 1/1 Running 3 2d21h 192.168.171.110 worker
student@master:~$

Ex 8.2, step 2
student@master:~$ kubectl -n accounting describe services
Name: service-lab
Namespace: accounting
Labels: system=secondary
Annotations:
Selector: system=secondary
Type: NodePort
IP: 10.97.208.233
Port: 8088/TCP
TargetPort: 8088/TCP
NodePort: 30215/TCP
Endpoints: 192.168.171.111:8088,192.168.171.112:8088
Session Affinity: None
External Traffic Policy: Cluster
Events:

Ex 8.2, step 3
student@master:~$ kubectl cluster-info
Kubernetes master is running at https://k8smaster:6443
KubeDNS is running at https://k8smaster:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy

Ex 8.2, step 4
student@master:~$ curl http://k8smaster:30215
curl: (7) Failed to connect to k8smaster port 30215: Connection refused

After Connection refused
student@master:~$ kubectl get pod -o wide -n accounting
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx-one-79c56b47b9-7tcxj 1/1 Running 0 29m 192.168.171.111 worker
nginx-one-79c56b47b9-8z57b 1/1 Running 0 29m 192.168.171.112 worker

zhangwe

Thank you very much for your help.

serewicz

My pleasure! :-)