kube-admin（2）：kubernetes學習資料，常用命令。
阿新 • • 發佈：2018-11-29
本文的原文連線是:
https://blog.csdn.net/freewebsys/article/details/83618119
博主地址是：http://blog.csdn.net/freewebsys
1，關於kube視訊
第一節是老外分享的，英文不好懶得聽了。
直接從第二節開始看。還是中文聽著舒服。
https://www.kubernetes.org.cn/3546.html/2
當然 IBM 推出這個學習教程也順便推動他的產品。
IBM® Cloud Private 私有云系統：
https://www.ibm.com/support/knowledgecenter/en/SSBS6K/product_welcome_cloud_private.html
最新的已經 3.1.0 了，這個也是kubernetes 的部署的一個簡單方法。
minikube 的安裝
https://kubernetes.cn/docs/tasks/tools/install-minikube/
當然也可以直接用docker 的gui 進行安裝。現在也都是很方便了。
參考文章：
https://blog.csdn.net/freewebsys/article/details/83536077
2，使用命令
$ kubectl -n kube-system get pods -o wide NAME READY STATUS RESTARTS AGE IP NODE etcd-docker-for-desktop 1/1 Running 1 13d 192.168.65.3 docker-for-desktop kube-apiserver-docker-for-desktop 1/1 Running 1 13d 192.168.65.3 docker-for-desktop kube-controller-manager-docker-for-desktop 1/1 Running 1 13d 192.168.65.3 docker-for-desktop kube-dns-86f4d74b45-m9tw8 3/3 Running 0 13d 10.1.0.5 docker-for-desktop kube-proxy-jqblr 1/1 Running 0 13d 192.168.65.3 docker-for-desktop kube-scheduler-docker-for-desktop 1/1 Running 1 13d 192.168.65.3 docker-for-desktop kubernetes-dashboard-7b9c7bc8c9-xpvzw 1/1 Running 0 1d 10.1.0.6 docker-for-desktop
檢視叢集
$ kubectl cluster-info
Kubernetes master is running at https://localhost:6443
KubeDNS is running at https://localhost:6443/api/v1/namespaces/kube-system/services/kube-dns:dns/proxy
$ kubectl version Client Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.3", GitCommit:"2bba0127d85d5a46ab4b778548be28623b32d0b0", GitTreeState:"clean", BuildDate:"2018-05-21T09:17:39Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"darwin/amd64"} Server Version: version.Info{Major:"1", Minor:"10", GitVersion:"v1.10.3", GitCommit:"2bba0127d85d5a46ab4b778548be28623b32d0b0", GitTreeState:"clean", BuildDate:"2018-05-21T09:05:37Z", GoVersion:"go1.9.3", Compiler:"gc", Platform:"linux/amd64"} $ kubectl api-versions admissionregistration.k8s.io/v1beta1 apiextensions.k8s.io/v1beta1 apiregistration.k8s.io/v1 apiregistration.k8s.io/v1beta1 apps/v1 apps/v1beta1 apps/v1beta2 authentication.k8s.io/v1 authentication.k8s.io/v1beta1 authorization.k8s.io/v1 authorization.k8s.io/v1beta1 autoscaling/v1 autoscaling/v2beta1 batch/v1 batch/v1beta1 certificates.k8s.io/v1beta1 compose.docker.com/v1beta1 compose.docker.com/v1beta2 events.k8s.io/v1beta1 extensions/v1beta1 networking.k8s.io/v1 policy/v1beta1 rbac.authorization.k8s.io/v1 rbac.authorization.k8s.io/v1beta1 storage.k8s.io/v1 storage.k8s.io/v1beta1 v1 $ kubectl get no NAME STATUS ROLES AGE VERSION docker-for-desktop Ready master 14d v1.10.3
學習各種命令才是基礎。
$ kubectl run nginx --image=nginx:alpine
deployment.apps "nginx" created
$ kubectl get deploy
NAME DESIRED CURRENT UP-TO-DATE AVAILABLE AGE
nginx 1 1 1 1 21s
$ kubectl describe deploy nginx
Name: nginx
Namespace: default
CreationTimestamp: Thu, 01 Nov 2018 14:42:22 +0800
Labels: run=nginx
Annotations: deployment.kubernetes.io/revision=1
Selector: run=nginx
Replicas: 1 desired | 1 updated | 1 total | 1 available | 0 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 1 max unavailable, 1 max surge
Pod Template:
Labels: run=nginx
Containers:
nginx:
Image: nginx:alpine
Port: <none>
Host Port: <none>
Environment: <none>
Mounts: <none>
Volumes: <none>
Conditions:
Type Status Reason
---- ------ ------
Available True MinimumReplicasAvailable
Progressing True NewReplicaSetAvailable
OldReplicaSets: <none>
NewReplicaSet: nginx-6fc74ccb78 (1/1 replicas created)
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal ScalingReplicaSet 6m deployment-controller Scaled up replica set nginx-6fc74ccb78 to 1
$ kubectl get pod -o wide
NAME READY STATUS RESTARTS AGE IP NODE
nginx-6fc74ccb78-xcgps 1/1 Running 0 19m 10.1.0.7 docker-for-desktop
$ kubectl logs nginx-6fc74ccb78-xcgps
$ kubectl exec -it nginx-6fc74ccb78-xcgps sh
/ # ifconfig
eth0 Link encap:Ethernet HWaddr E6:F0:2A:8A:33:53
inet addr:10.1.0.7 Bcast:0.0.0.0 Mask:255.255.0.0
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:15 errors:0 dropped:0 overruns:0 frame:0
TX packets:1 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:0
RX bytes:1110 (1.0 KiB) TX bytes:42 (42.0 B)
lo Link encap:Local Loopback
inet addr:127.0.0.1 Mask:255.0.0.0
UP LOOPBACK RUNNING MTU:65536 Metric:1
RX packets:0 errors:0 dropped:0 overruns:0 frame:0
TX packets:0 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1
RX bytes:0 (0.0 B) TX bytes:0 (0.0 B)
/ # nginx -v
nginx version: nginx/1.15.5
/ # exit
建立服務：
nginx.svc.yaml：
apiVersion: v1
kind: Service
metadata:
name: nginx
spec:
ports:
- name: http
port: 8888
nodePort: 30001
targetPort: 80
selector:
run: nginx
type: NodePort
$ kubectl create -f nginx.svc.yaml
service "nginx" created
$ kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 <none> 443/TCP 14d
nginx NodePort 10.104.36.202 <none> 8888:30001/TCP 21s
$ kubectl get ep
NAME ENDPOINTS AGE
kubernetes 192.168.65.3:6443 14d
nginx 10.1.0.7:80 4m
$ kubectl scale deploy nginx --replicas=3
deployment.extensions "nginx" scaled
$ kubectl get rs
NAME DESIRED CURRENT READY AGE
nginx-6fc74ccb78 3 3 3 34m
$ kubectl get pods
NAME READY STATUS RESTARTS AGE
nginx-6fc74ccb78-jqpd5 1/1 Running 0 31s
nginx-6fc74ccb78-tzwb2 1/1 Running 0 31s
nginx-6fc74ccb78-xcgps 1/1 Running 0 34m
$ kubectl rollout history deploy
deployments "nginx"
REVISION CHANGE-CAUSE
1 <none>
$ kubectl describe deploy nginx
Name: nginx
Namespace: default
CreationTimestamp: Thu, 01 Nov 2018 14:42:22 +0800
Labels: run=nginx
Annotations: deployment.kubernetes.io/revision=1
Selector: run=nginx
Replicas: 3 desired | 3 updated | 3 total | 3 available | 0 unavailable
StrategyType: RollingUpdate
MinReadySeconds: 0
RollingUpdateStrategy: 1 max unavailable, 1 max surge
4，總結
最重要的就是 先把 kubectl 命令學習熟練。
就和 docker 命令類似，加上引數檢視叢集。
能很方便的進行容器的管理，檢視，擴充套件，運維。
同時dashboard上面的也是直接訪問api 類似的操作。
只不過是視覺化的。我這邊使用不是 minikube 而是docker 預設的kubernetes ，也是一樣操作的。
中文文件：
https://k8smeetup.github.io/docs/home/
現在 kubernetes 的文件都非常的多了。學習起來也非常的方便。
本文的原文連線是:
https://blog.csdn.net/freewebsys/article/details/83618119
博主地址是：http://blog.csdn.net/freewebsys
