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Unable to curl a service/Unable to connect to a service from browser in Kubernetes
Hello,
I am new to Kubernetes.
I have created a cluster with one control plane and one worker node(AWS Ubuntu ec2 machines).
For this I have executed below commands on Ubuntu Master node:
1 apt-get update
2 apt-get install apt-transport-https
3 curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
4 cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
5 apt-get update
6 apt-get install -y docker.io
7 apt-get install -y kubelet kubeadm kubectl kubernetes-cni
8 kubeadm init
9 kubeadm init --ignore-preflight-errors=NumCPU --pod-network-cidr=10.240.0.0/16
10 mkdir -p $HOME/.kube
11 kubectl get nodes
12 kubtctl describe node
13 kubtctl describe nodes
14 kubectl describe nodes
15 sysctl net.bridge.bridge-nf-call-iptables=1
16 swapoff -a
17 kubectl describe nodes
18 kubectl get nodes
19 kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml
20 kubectl get nodes
And below commands on Ubuntu worker node:
1 apt-get update
2 apt-get install apt-transport-https
3 curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
4 cat <<EOF >/etc/apt/sources.list.d/kubernetes.list
deb https://apt.kubernetes.io/ kubernetes-xenial main
EOF
5 apt-get update
6 apt-get install -y docker.io
7 apt-get install -y kubelet kubeadm kubectl kubernetes-cni
8 swapoff -a
9 kubeadm join 172.31.19.73:6443 --token ziy4ub.lbwj7bj0jyg0w39b --discovery-token-ca-cert-hash sha256:437144bad50f7c4d5e316e6136b1750db4c93c0ac2879c2a1ba5ab7a57310ae0
Both these VMs can connect to each other via ssh.
Now I created a typical deployment with below yaml file:
apiVersion: apps/v1 # for versions before 1.9.0 use apps/v1beta2
kind: Deployment
metadata:
name: nginx-deployment
spec:
selector:
matchLabels:
app: nginx
replicas: 2 # tells deployment to run 2 pods matching the template
template:
metadata:
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx:1.7.9
ports:
- containerPort: 80
and created a service.
nginx-deployment NodePort 10.102.47.210 80:30357/TCP 30m
But now I am not able to curl/connect to this service:
root@ip-172-31-19-73:~/kube# curl -v 10.102.47.210
- Rebuilt URL to: 10.102.47.210/
- Trying 10.102.47.210...
- TCP_NODELAY set
- connect to 10.102.47.210 port 80 failed: Connection refused
- Failed to connect to 10.102.47.210 port 80: Connection refused
- Closing connection 0
curl: (7) Failed to connect to 10.102.47.210 port 80: Connection refused
With port 30357, curl is stuck:(
root@ip-172-31-19-73:~/kube# curl -v 10.102.47.210:30357
- Rebuilt URL to: 10.102.47.210:30357/
- Trying 10.102.47.210...
- TCP_NODELAY set
Also I am not able to curl pods as well:
nginx-deployment-54f57cf6bf-mj6gb 1/1 Running 0 38m 10.240.1.3 ip-172-31-29-100
nginx-deployment-54f57cf6bf-xnj5t 1/1 Running 0 38m 10.240.1.2 ip-172-31-29-100
It stuck too:(
root@ip-172-31-19-73:~/kube# curl -v 10.240.1.3
- Rebuilt URL to: 10.240.1.3/
- Trying 10.240.1.3...
- TCP_NODELAY set
Could somebody please help?
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