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| Pod是k8s调度的最小单位，一个Pod中可以有多个Container
1、创建一个Pod
yujiangdeMBP-13:k8s_yaml yujiang$ cat pod_nginx.yml
apiVersion: v1
kind: Pod
metadata:
name: nginx
labels:
app: nginx
spec:
containers:
- name: nginx
image: nginx
ports:
- containerPort: 80
yujiangdeMBP-13:k8s_yaml yujiang$ kubectl create -f pod_nginx.yml
pod/nginx created
2、查看Pod
yujiangdeMBP-13:k8s_yaml yujiang$ kubectl get pod --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
default nginx 1/1 Running 0 20m
kube-system kube-addon-manager-minikube 1/1 Running 8 60m
kube-system kube-dns-54cccfbdf8-kr847 3/3 Running 12 57m
kube-system kubernetes-dashboard-77d8b98585-vq77b 1/1 Running 4 57m
kube-system storage-provisioner 1/1 Running 5 57m
3、查看Pod的详细信息，可以看到Pod运行在哪台机器上
yujiangdeMBP-13:k8s_yaml yujiang$ kubectl get pods -o wide
NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
nginx 1/1 Running 0 31m 172.17.0.2 minikube <none> <none>
4、打开dashboard
yujiangdeMBP-13:k8s_yaml yujiang$ minikube dashboard
5、查询nginx IP
$ docker network ls
NETWORK ID NAME DRIVER SCOPE
fb08befd952b bridge bridge local
2de0a434731f host host local
4cd7f4c7083c none null local
$ docker network inspect bridge
[
{
"Name": "bridge",
"Id": "fb08befd952b4448e86e491f271a1e6a50056b5a18bdfb8a3e930edde2ac44da",
"Created": "2018-12-24T17:23:11.618994916Z",
"Scope": "local",
"Driver": "bridge",
"EnableIPv6": false,
"IPAM": {
"Driver": "default",
"Options": null,
"Config": [
{
"Subnet": "172.17.0.0/16",
"Gateway": "172.17.0.1"
}
]
},
"Internal": false,
"Attachable": false,
"Ingress": false,
"ConfigFrom": {
"Network": ""
},
"ConfigOnly": false,
"Containers": {
"25e63a3ff8a091319fdec698f554f1b47c3e019fbdda9b06709d15630003ee6e": {
"Name": "k8s_POD_kube-dns-54cccfbdf8-kr847_kube-system_69d32f1a-0799-11e9-be08-080027bea66e_8",
"EndpointID": "004b9a81ab36cd4e0aba21572b4736b8d85d5541c3533571a67383e5d07e34b6",
"MacAddress": "02:42:ac:11:00:03",
"IPv4Address": "172.17.0.3/16",
"IPv6Address": ""
},
"4138eeb8348781495987d47f6683138515111d2b6afa6fc7352d5f98d4a0858b": {
"Name": "k8s_POD_kubernetes-dashboard-77d8b98585-vq77b_kube-system_69b46ed4-0799-11e9-be08-080027bea66e_8",
"EndpointID": "bb31db755c5a5cd8f36bec35d89c73267d3d283ba8caa691b58ba504b0d6fabc",
"MacAddress": "02:42:ac:11:00:04",
"IPv4Address": "172.17.0.4/16",
"IPv6Address": ""
},
"6874ee85f9257b5b0dfdf808ebf92df9c3c677079a778980956e4655abf23507": {
"Name": "k8s_POD_nginx_default_9e0d9ffc-079e-11e9-be08-080027bea66e_0",
"EndpointID": "040a5616a76665ff9e35bb6cef2388f8db443b2db94b67282a7496b9803acc20",
"MacAddress": "02:42:ac:11:00:02",
"IPv4Address": "172.17.0.2/16",
"IPv6Address": ""
}
},
"Options": {
"com.docker.network.bridge.default_bridge": "true",
"com.docker.network.bridge.enable_icc": "true",
"com.docker.network.bridge.enable_ip_masquerade": "true",
"com.docker.network.bridge.host_binding_ipv4": "0.0.0.0",
"com.docker.network.bridge.name": "docker0",
"com.docker.network.driver.mtu": "1500"
},
"Labels": {}
}
]
$ curl 172.17.0.2
<!DOCTYPE html>
<html>
<head>
<title>Welcome to nginx!</title>
<style>
body {
width: 35em;
margin: 0 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>
6、指定Pod名，进入Container(默认进入第1个Container)。如果Pod中有多个Container，可以加"-c"参数指定进入哪个Container。
yujiangdeMBP-13:k8s_yaml yujiang$ kubectl exec -it nginx sh
7、打印nginx Pod的详细信息
yujiangdeMBP-13:k8s_yaml yujiang$ kubectl describe pod nginx
8、怎样把nginx的端口映射出来？
有两种方法：
(1)port-forward
yujiangdeMBP-13:k8s_yaml yujiang$ kubectl port-forward nginx 8080:80
打开浏览器：http://127.0.0.1:8080/
|