Kubernetes master server 6443 was refused issue
1.my eth0 inet is 192.168.40.6
telnet 192.168.40.6 6443 is no response
2.while
telnet 127.0.0.1 6443 is connected
3.kubeadm version
kubeadm version: &version.Info{Major:"1", Minor:"20", GitVersion:"v1.20.5", GitCommit:"6b1d87acf3c8253c123756b9e61dac642678305f", GitTreeState:"clean", BuildDate:"2021-03-18T01:08:27Z", GoVersion:"go1.15.8", Compiler:"gc", Platform:"linux/amd64"}
4.docker -v
Docker version 1.13.1, build 0be3e21/1.13.1
Related
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"}
I am quite new to kubernetes and when i check the kubernetes version with kubectl version I am getting the following error.
Client Version: version.Info{Major:"1", Minor:"8", GitVersion:"v1.8.0", GitCommit:"6e937839ac04a38cac63e6a7a306c5d035fe7b0a", GitTreeState:"clean", BuildDate:"2017-09-28T22:57:57Z", GoVersion:"go1.8.3", Compiler:"gc", Platform:"windows/amd64"}
Unable to connect to the server: dial tcp 127.0.0.1:6443: connectex: No connection could be made because the target machine actively refused it.
Can you please help me with this?
Thanks in advance!
Seems you have setup kubernetes via kubeadm. Please verify if your kubernetes is running or not.
systemctl restart kubeadm
After that check if port is listening or not
netstat -an | grep :6443
My issue is that I can not connect between our machines (master and slaves)
My connection command should be
kubeadm join xxx:xxx:xxx:xxx:6443 --token a72x22.ofmqdjyzi7ot4l70 --discovery-token-ca-cert-hash sha256:3cfd9ddb1e655ef2172c12d914e2bb001434cc4c8a756919a7a6a9f0603e3131
I have been execute
echo 1 >/proc/sys/net/bridge/bridge-nf-call-iptables
echo 1 >/proc/sys/net/ipv4/ip_forward
swapoff -a
and I got the error
[kubelet-start] Downloading configuration for the kubelet from the
"kubelet-config-1.15" ConfigMap in the kube-system namespace error
execution phase kubelet-start: configmaps "kubelet-config-1.15" is
forbidden: User "system:bootstrap:a61x22" can
not get resource "configmaps" in API group "" in the namespace
"kube-system"
master kubectl version
Client Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.0", GitCommit:"e8462b5b5dc2584fdcd18e6bcfe9f1e4d970a529", GitTreeState:"clean", BuildDate:"2019-06-19T16:40:16Z", GoVersion:"go1.12.5", Compiler:"gc", Platform:"linux/amd64"} Server Version: version.Info{Major:"1", Minor:"14", GitVersion:"v1.14.3", GitCommit:"5e53fd6bc17c0dec8434817e69b04a25d8ae0ff0", GitTreeState:"clean", BuildDate:"2019-06-06T01:36:19Z", GoVersion:"go1.12.5", Compiler:"gc", Platform:"linux/amd64"}
slaves kubectl version
Client Version: version.Info{Major:"1", Minor:"15", GitVersion:"v1.15.0", GitCommit:"e8462b5b5dc2584fdcd18e6bcfe9f1e4d970a529", GitTreeState:"clean", BuildDate:"2019-06-19T16:40:16Z", GoVersion:"go1.12.5", Compiler:"gc", Platform:"linux/amd64"}
The connection to the server localhost:8080 was refused - did you specify the right host or port?
maybe my issue is connected to the host or port?
how can I solve this issue?
Check if configmaps "kubelet-config-1.15" exists with the command below.
kubectl -n kube-system get configmap kubelet-config-1.15
Maybe your master is at version 1.14 and your new node downloaded a kubelet version 1.15.
In that case your configmap didn't exists and you have a configmap kubelet-config-1.14.
Upgrade your master node to v 1.15 or install kubernetes v1.14 into your worker node.
You can see what version your nodes are with
kubectl get nodes
[root#master /]# k get nodes
NAME STATUS ROLES AGE VERSION
master Ready master 32d v1.14.0
node6 Ready 32d v1.14.2
nodo2 Ready 32d v1.14.2
I am new to kubernetes and I have been experimenting with docker & minkube + kubernetes for a few weeks...
Everything appears to be working properly except the dashboard...These are my investigation but I have no clue how to fix this.
It is an out-of-the-box configuration, even with kubectl proxy with port 8001 don't work.
me#DEV ~ $ minikube version
minikube version: v0.28.0
me#DEV ~ $ kubectl version
Client Version: version.Info{Major:"1", Minor:"11", GitVersion:"v1.11.0", GitCommit:"91e7b4fd31fcd3d5f436da26c980becec37ceefe", GitTreeState:"clean", BuildDate:"2018-06-27T20:17:28Z", GoVersion:"go1.10.2", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.0", GitCommit:"fc32d2f3698e36b93322a3465f63a14e9f0eaead", GitTreeState:"clean", BuildDate:"2018-03-26T16:44:10Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"linux/amd64"}
zollen#DEV ~ $ kubectl logs pod/kubernetes-dashboard-5498ccf677-hw574 --namespace=kube-system
2018/07/16 00:23:46 Starting overwatch
2018/07/16 00:23:46 Using in-cluster config to connect to apiserver
2018/07/16 00:23:46 Using service account token for csrf signing
2018/07/16 00:23:46 No request provided. Skipping authorization
2018/07/16 00:24:16 Error while initializing connection to Kubernetes apiserver. This most likely means that the cluster is misconfigured (e.g., it has invalid apiserver certificates or service accounts configuration) or the --apiserver-host param points to a server that does not exist. Reason: Get https://10.96.0.1:443/version: dial tcp 10.96.0.1:443: i/o timeout
Refer to our FAQ and wiki pages for more information: https://github.com/kubernetes/dashboard/wiki/
me#DEV ~/Downloads $ minikube dashboard
Waiting, endpoint for service is not ready yet...
Waiting, endpoint for service is not ready yet...
me#DEV ~ $ curl https://10.96.0.1:443/version
curl: (60) server certificate verification failed. CAfile: /etc/ssl/certs/ca-certificates.crt CRLfile: none
me#DEV ~ $ kubectl proxy &
Starting to serve on 127.0.0.1:8001
me#DEV ~/Downloads $ curl $(minikube ip):8001
curl: (7) Failed to connect to 10.0.2.15 port 8001: Connection refused
me#DEV ~/Downloads $ curl localhost:8001
{
"paths": [
"/api",
"/api/v1",
"/apis",
"/apis/",
"/apis/admissionregistration.k8s.io",
"/apis/admissionregistration.k8s.io/v1beta1",
"/apis/apiextensions.k8s.io",
"/apis/apiextensions.k8s.io/v1beta1",
"/apis/apiregistration.k8s.io",
"/apis/apiregistration.k8s.io/v1",
"/apis/apiregistration.k8s.io/v1beta1",
"/apis/apps",
"/apis/apps/v1",
"/apis/apps/v1beta1",
"/apis/apps/v1beta2",
"/apis/authentication.k8s.io",
"/apis/authentication.k8s.io/v1",
"/apis/authentication.k8s.io/v1beta1",
"/apis/authorization.k8s.io",
"/apis/authorization.k8s.io/v1",
"/apis/authorization.k8s.io/v1beta1",
"/apis/autoscaling",
"/apis/autoscaling/v1",
"/apis/autoscaling/v2beta1",
"/apis/batch",
"/apis/batch/v1",
"/apis/batch/v1beta1",
"/apis/certificates.k8s.io",
"/apis/certificates.k8s.io/v1beta1",
"/apis/events.k8s.io",
"/apis/events.k8s.io/v1beta1",
"/apis/extensions",
"/apis/extensions/v1beta1",
"/apis/networking.k8s.io",
"/apis/networking.k8s.io/v1",
"/apis/policy",
"/apis/policy/v1beta1",
"/apis/rbac.authorization.k8s.io",
"/apis/rbac.authorization.k8s.io/v1",
"/apis/rbac.authorization.k8s.io/v1beta1",
"/apis/storage.k8s.io",
"/apis/storage.k8s.io/v1",
"/apis/storage.k8s.io/v1beta1",
"/healthz",
"/healthz/autoregister-completion",
"/healthz/etcd",
"/healthz/ping",
"/healthz/poststarthook/apiservice-openapi-controller",
"/healthz/poststarthook/apiservice-registration-controller",
"/healthz/poststarthook/apiservice-status-available-controller",
"/healthz/poststarthook/bootstrap-controller",
"/healthz/poststarthook/ca-registration",
"/healthz/poststarthook/generic-apiserver-start-informers",
"/healthz/poststarthook/kube-apiserver-autoregistration",
"/healthz/poststarthook/rbac/bootstrap-roles",
"/healthz/poststarthook/start-apiextensions-controllers",
"/healthz/poststarthook/start-apiextensions-informers",
"/healthz/poststarthook/start-kube-aggregator-informers",
"/healthz/poststarthook/start-kube-apiserver-informers",
"/logs",
"/metrics",
"/openapi/v2",
"/swagger-2.0.0.json",
"/swagger-2.0.0.pb-v1",
"/swagger-2.0.0.pb-v1.gz",
"/swagger.json",
"/swaggerapi",
"/version"
]
}
.
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.