k8s部署nginx集群
环境：
两台虚拟机，
10.10.20.203 部署docker、etcd、flannel、kube-apiserver、kube-controller-manager、kube-scheduler
10.10.20.206 部署docker、flannel、kubelet、kube-proxy
1、创建nginx-rc.yaml
apiVersion: v1
kind: ReplicationController
metadata:
name: nginx-controller
spec:
replicas:
selector:
name: nginx
template:
metadata:
labels:
name: nginx
spec:
containers:
- name: nginx
image: nginx
ports:
- containerPort:
2、创建nginx-service-nodeport.yaml
apiVersion: v1
kind: Service
metadata:
name: nginx-service-nodeport
spec:
ports:
- port:
targetPort:
protocol: TCP
type: NodePort
selector:
name: nginx
3、创建pod
kubectl create -f nginx-rc.yaml
4、创建service
kubectl create -f nginx-service-nodeport.yaml
5、查看pod
[root@k8s-master ~]# kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-controller-v40nj / Running 1h
nginx-controller-zxdzh / Running 1h
[root@k8s-master ~]# kubectl describe pod nginx-controller-v40nj
Name: nginx-controller-v40nj
Namespace: default
Node: k8s-slave1-/60.19.29.21
Start Time: Thu, Aug :: -
Labels: name=nginx
Status: Running
IP: 10.0.83.3
Controllers: ReplicationController/nginx-controller
Containers:
nginx:
Container ID: docker://269adc9b693aba0356ba18e4253c2b498fc7b7a8ce0af83857fcfd6b70e6ef03
Image: nginx
Image ID: docker://sha256:0d409d33b27e47423b049f7f863faa08655a8c901749c2b25b93ca67d01a470d
Port: /TCP
State: Running
Started: Thu, Aug :: -
Last State: Terminated
Reason: Completed
Exit Code:
Started: Thu, Aug :: -
Finished: Thu, Aug :: -
Ready: True
Restart Count:
Environment Variables: <none>
Conditions:
Type Status
Initialized True
Ready True
PodScheduled True
No volumes.
QoS Tier: BestEffort
Events:
FirstSeen LastSeen Count From SubobjectPath Type Reason Message
--------- -------- ----- ---- ------------- -------- ------ -------
5m 5m {kubelet k8s-slave1-} spec.containers{nginx} Normal Pulling pulling image "nginx"
5m 5m {kubelet k8s-slave1-} Warning MissingClusterDNS kubelet does not have ClusterDNS IP configured and cannot create Pod using "ClusterFirst" policy. Falling back to DNSDefault policy.
5m 5m {kubelet k8s-slave1-} spec.containers{nginx} Normal Pulled Successfully pulled image "nginx"
5m 5m {kubelet k8s-slave1-} spec.containers{nginx} Normal Created Created container with docker id 269adc9b693a
5m 5m {kubelet k8s-slave1-} spec.containers{nginx} Normal Started Started container with docker id 269adc9b693a
6、查看service
[root@k8s-master ~]# kubectl get service
NAME CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes 10.254.0.1 <none> /TCP 16h
nginx-service-nodeport 10.254.29.72 <nodes> /TCP 49m
[root@k8s-master ~]# kubectl describe service nginx-service-nodeport
Name: nginx-service-nodeport
Namespace: default
Labels: <none>
Selector: name=nginx
Type: NodePort
IP: 10.254.29.72
Port: <unset> /TCP
NodePort: <unset> /TCP
Endpoints: 10.0.83.2:,10.0.83.3:
Session Affinity: None
No events.
7、测试service是否好用
因为service使用的是NodePort方式，所以在任何一个节点访问31152这个端口都可以访问nginx
$ curl 10.10.20.203:
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p> <p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p> <p><em>Thank you for using nginx.</em></p>
</body>
</html>
$ curl 10.10.20.206:
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: auto;
font-family: Tahoma, Verdana, Arial, sans-serif;
}
</style>
</head>
<body>
<h1>Welcome to nginx!</h1>
<p>If you see this page, the nginx web server is successfully installed and
working. Further configuration is required.</p> <p>For online documentation and support please refer to
<a href="http://nginx.org/">nginx.org</a>.<br/>
Commercial support is available at
<a href="http://nginx.com/">nginx.com</a>.</p> <p><em>Thank you for using nginx.</em></p>
</body>
</html>
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