I installed kubeflow manifest follow from kubeflow/manifasts.
And I checked istio-ingressgateway work for me.
$ kubectl get svc istio-ingressgateway -n istio-system
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
istio-ingressgateway NodePort 10.96.89.178 <none> 15021:32680/TCP,80:32075/TCP,443:32334/TCP,31400:30226/TCP,15443:30276/TCP 15m
$ kubectl port-forward svc/istio-ingressgateway -n istio-system 8080:80
Forwarding from 127.0.0.1:8080 -> 8080
Forwarding from [::1]:8080 -> 8080
This terminal should always be running when I connecting to 8080.
What I need help:
I want this port forwarding to run in the background.
There is no way to run port-forward in the background??
env:
ubuntu 20.04
$ kubectl version --client && kubeadm version
Client Version: version.Info{Major:"1", Minor:"22", GitVersion:"v1.22.13", GitCommit:"a43c0904d0de10f92aa3956c74489c45e6453d6e", GitTreeState:"clean", BuildDate:"2022-08-17T18:28:56Z", GoVersion:"go1.16.15", Compiler:"gc", Platform:"linux/amd64"}
kubeadm version: &version.Info{Major:"1", Minor:"22", GitVersion:"v1.22.13", GitCommit:"a43c0904d0de10f92aa3956c74489c45e6453d6e", GitTreeState:"clean", BuildDate:"2022-08-17T18:27:51Z", GoVersion:"go1.16.15", Compiler:"gc", Platform:"linux/amd64"}
Related
Problem
Coursera Google Cloud Fundamentals: Getting Started with Kubernetes Engine
has the instructions to run and expose the pod. The demo video shows it is working.
However, it causes the error in my execution. How to fix?
kubectl run nginx --image=nginx:1.10.0
kubectl expose deployment nginx --type LoadBalancer --port 80
---
Error from server (NotFound): deployments.apps "nginx" not found
Environment
GCP k8s.
$ kubectl version
Client Version: version.Info{Major:"1", Minor:"22", GitVersion:"v1.22.1", GitCommit:"632ed300f2c34f6d6d15ca4cef3d3c7073412212", GitTreeState:"clean", BuildDate:"2021-08-19T15:45:37Z", GoVersion:"go1.16.7", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"20+", GitVersion:"v1.20.8-gke.2100", GitCommit:"4cd085fda961821985d176d25b67445c1efb6ba1", GitTreeState:"clean", BuildDate:"2021-07-16T09:22:57Z", GoVersion:"go1.15.13b5", Compiler:"gc", Platform:"linux/amd64"}
WARNING: version difference between client (1.22) and server (1.20) exceeds the supported minor version skew of +/-1
Cause
kubectl run does not create deployment.
'Error from server (NotFound): deployments.extensions "nginx" not found' when exposing NodePort #31
Did you create a pod with "kubectl run"? If yes, that doesn't create a deployment with (at least) kubectl v1.18.2, so instead use "kubectl create deployment nginx --image=nginx:1.10.0"
Fix
Create a deployment as in Creating and exploring an nginx deployment from a YAML or run kubectl create deployment ....
$ kubectl create deployment nginx --image=nginx:1.12.0
deployment.apps/nginx created
$ kubectl expose deployment nginx --type LoadBalancer --port 80
service/nginx exposed
$ kubectl get services
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.83.240.1 <none> 443/TCP 44m
nginx LoadBalancer 10.83.246.84 35.225.127.227 80:30825/TCP 60s
I am following this example
When I run the following command I get the error:
➜ kubectl create deployment hello-minikube --image=k8s.gcr.io/echoserver:1.10
Error from server (NotFound): the server could not find the requested resource
I just installed fresh minikube, kubectl and the data is below:
Development/tools/k8s
➜ kubectl get nodes
NAME STATUS AGE
minikube Ready 2m
Development/tools/k8s
➜ kubectl get pods
No resources found.
Development/tools/k8s
➜ kubectl get rc --all-namespaces
No resources found.
Development/tools/k8s
➜ kubectl cluster-info
Kubernetes master is running at https://192.168.99.101:8443
KubeDNS is running at https://192.168.99.101:8443/api/v1/proxy/namespaces/kube-system/services/kube-dns
To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
➜ kubectl version
Client Version: version.Info{Major:"1", Minor:"5", GitVersion:"v1.5.3", GitCommit:"029c3a408176b55c30846f0faedf56aae5992e9b", GitTreeState:"clean", BuildDate:"2017-02-15T06:40:50Z", GoVersion:"go1.7.4", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.3", GitCommit:"06ad960bfd03b39c8310aaf92d1e7c12ce618213", GitTreeState:"clean", BuildDate:"2020-02-11T18:07:13Z", GoVersion:"go1.13.6", Compiler:"gc", Platform:"linux/amd64"}
➜ minikube version
minikube version: v1.7.3
commit: 436667c819c324e35d7e839f8116b968a2d0a3ff
What am I doing wrong?
Your kubectl is version 1.5 which is very old. It’s trying to use an outdated format for the Deployment resource which no longer exists in the server.
I have deployed minikube on MacOS using the instructions here https://kubernetes.io/docs/tasks/tools/install-minikube/
The brew install was ok and the minikube status shows
$ minikube status
host: Running
kubelet: Running
apiserver: Running
kubectl: Correctly Configured: pointing to minikube-vm at 192.168.99.102
I am able to interact with the cluster using kubectl
$kubectl run hello-minikube --image=k8s.gcr.io/echoserver:1.10 --port=8080
Viewing the pods is also ok
$kubectl get pod
NAME READY STATUS RESTARTS AGE
hello-minikube-856979d68c-glhsx 1/1 Running 0 18m
But when i try to launch the kubectl dashboard, i get 503 error
$minikube dashboard
Temporary Error: unexpected response code: 503
Temporary Error: unexpected response code: 503
The Dashboard service seems to present
$kubectl -n kube-system get svc -o wide
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE SELECTOR
kube-dns ClusterIP 10.96.0.10 <none> 53/UDP,53/TCP,9153/TCP 3h19m k8s-app=kube-dns
kubernetes-dashboard ClusterIP 10.109.210.119 <none> 80/TCP 119m app=kubernetes-dashboard
below is the kubectl version info
$kubectl version
Client Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.2", GitCommit:"f6278300bebbb750328ac16ee6dd3aa7d3549568", GitTreeState:"clean", BuildDate:"2019-08-05T16:57:42Z", GoVersion:"go1.12.7", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.2", GitCommit:"f6278300bebbb750328ac16ee6dd3aa7d3549568", GitTreeState:"clean", BuildDate:"2019-08-05T09:15:22Z", GoVersion:"go1.12.5", Compiler:"gc", Platform:"linux/amd64"}
Any pointers on what is missing ? How to get the dashboard working
Thanks
Praveen
Check kubectl cluster-info, you can find more here
kubectl -n kube-system port-forward svc/kubernetes-dashboard 8080:80
Your dashboard should be accessible on http://localhost:8080, keep in mind that the dashboard is deprecated so you can check octant.
Try $ minikube dashboard command. It will open a new tab in your default browser showing the minikube dashbord.
Finally able to solve this issue with instructions from GitHub issues
https://github.com/kubernetes/minikube/issues/4352
Basically, with these commands
minikube stop
minikube start --extra-config=apiserver.authorization-mode=RBAC
kubectl create clusterrolebinding add-on-cluster-admin --clusterrole=cluster-admin --serviceaccount=kube-system:default
minikube dashboard
I want to set up port forwarding from my local ports (nodes) to the pod redis-master after the online guide from kubernetes.
At the moment my prompt is frozen for more than 5 minutes at the port-forward command.
[root#k8s-master deployments]# kubectl create -f https://k8s.io/docs/tasks/access-application-cluster/redis-master.yaml
pod "redis-master" created
[root#k8s-master deployments]# kubectl get pods
NAME READY STATUS RESTARTS AGE
redis-master 2/2 Running 0 1m
[root#k8s-master deployments]# kubectl get pods redis-master --template='{{(index (index .spec.containers 0).ports 0).containerPort}}{{"\n"}}'
6379
[root#k8s-master deployments]# kubectl port-forward redis-master 6379:6379
Forwarding from 127.0.0.1:6379 -> 6379
^C
I don't know why my prompt is frozen. In my logs aren't some error or warn entries.
journalctl -u kubelet.service -f --since "2018-02-19 10:30:00" --priority 0
-- Logs begin at Sa 2018-02-03 21:21:50 CET. --
kubectl version
[root#k8s-master deployments]# kubectl version
Client Version: version.Info{Major:"1", Minor:"9", GitVersion:"v1.9.2", GitCommit:"5fa2db2bd46ac79e5e00a4e6ed24191080aa463b", GitTreeState:"clean", BuildDate:"2018-01-18T10:09:24Z", GoVersion:"go1.9.2", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"9", GitVersion:"v1.9.2", GitCommit:"5fa2db2bd46ac79e5e00a4e6ed24191080aa463b", GitTreeState:"clean", BuildDate:"2018-01-18T09:42:01Z", GoVersion:"go1.9.2", Compiler:"gc", Platform:"linux/amd64"}
os-release
[root#k8s-master deployments]# cat /etc/os-release
NAME="CentOS Linux"
VERSION="7 (Core)"
ID="centos"
ID_LIKE="rhel fedora"
VERSION_ID="7"
PRETTY_NAME="CentOS Linux 7 (Core)"
ANSI_COLOR="0;31"
CPE_NAME="cpe:/o:centos:centos:7"
HOME_URL="https://www.centos.org/"
BUG_REPORT_URL="https://bugs.centos.org/"
CENTOS_MANTISBT_PROJECT="CentOS-7"
CENTOS_MANTISBT_PROJECT_VERSION="7"
REDHAT_SUPPORT_PRODUCT="centos"
REDHAT_SUPPORT_PRODUCT_VERSION="7"
Ports
[root#k8s-master deployments]# ss -atun | grep 6379
[root#k8s-master deployments]#
The behaviour you see is expected. This command does not get daemonized by default. It will be forwarding the port until you kill the command with CTRL-C or other similar methods.
You could try using & at the end of the command if you want to continue using that prompt. Personally I would use a terminal multiplexer like tmux or screen.
I can't seem to be able to find the Kubernetes API IP address from within the minikube machine, using minikube ssh.
nslookup kubernetes.default.svc.cluster.local 10.0.0.1
Server: 10.0.0.1
Address 1: 10.0.0.1
nslookup: can't resolve 'kubernetes.default.svc.cluster.local'
Same thing happens with just kubernetes. This happens even though it seems that the kube-dns pods are up-and-running just fine:
# kubectl -n kube-system get pods
NAME READY STATUS RESTARTS AGE
kube-addon-manager-minikube 1/1 Running 0 9m
kube-dns-910330662-16bvw 3/3 Running 0 8m
kubernetes-dashboard-vbn9m 1/1 Running 0 8m
There is no KubeDNS info in cluster-info (but nothing major in the dump):
# kubectl cluster-info
Kubernetes master is running at https://192.168.64.26:8443
To further debug and diagnose cluster problems, use 'kubectl cluster-info dump'.
Version for kubectl:
# kubectl version
Client Version: version.Info{Major:"1", Minor:"7", GitVersion:"v1.7.5", GitCommit:"17d7182a7ccbb167074be7a87f0a68bd00d58d97", GitTreeState:"clean", BuildDate:"2017-08-31T09:14:02Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"darwin/amd64"}
Server Version: version.Info{Major:"1", Minor:"7", GitVersion:"v1.7.0", GitCommit:"d3ada0119e776222f11ec7945e6d860061339aad", GitTreeState:"clean", BuildDate:"2017-07-26T00:12:31Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"linux/amd64"}
and minikube:
# minikube version
minikube version: v0.21.0
This happens on OSX and both with xhyve and virtualbox as drivers.
There are quite a few minikube/dns issues in the minikube issue tracker, but none of them quite like this. What should the kubectl cluster-info output look like for minikube that has kube-dns working? What about the nslookup, shouldn't that work?
EDIT. It seems like kubectl cluster-info for minikube is returning what it should, but I can't even resolve kubernetes from inside the kube-dns pod either:
# kubectl -n kube-system exec -it kube-dns-910330662-1n64f -c kubedns -- nslookup kubernetes.default.svc.cluster.local localhost
Server: 127.0.0.1
Address 1: 127.0.0.1 localhost
nslookup: can't resolve 'kubernetes.default.svc.cluster.local': Name does not resolve
which really should work?