minikube AnSo

CentOS

kubectl官网 ：https://kubernetes.io/docs/tasks/tools/install-kubectl/#install-kubectl-on-linux
minikube官网 ：https://kubernetes.io/docs/tasks/tools/install-minikube/

Installation kubectl

# 01 下载[这边我给大家下载好了，在网盘kubectl&minikube中，大家上传到自己的centos7机器中。]

链接：https://pan.baidu.com/s/1Jen-cVxiTKEJKkstJW4Kow 
提取码：enra 

# 02 授权
chmod +x ./kubectl

# 03 添加到环境变量
sudo mv ./kubectl /usr/local/bin/kubectl

# 04 检查
kubectl version

AnSo minikube

# 01 下载[这边我给大家下载好了，在网盘kubectl&minikube中，大家上传到自己的centos7机器中。]
# 02 配置环境变量
sudo mv minikube-linux-amd64 minikube && chmod +x minikube && mv minikube /usr/local/bin/
# 03 检查
minikube version

Use minikube create a single-node k8s

minikube start --vm-driver=none --image-repository=gcr.azk8s.cn/google-containers

QA:
Here we might not pull images

Solution:

镜像名称                                                  镜像版本号
gcr.azk8s.cn/google-containers/kube-proxy                v1.16.2             
gcr.azk8s.cn/google-containers/kube-scheduler            v1.16.2             
gcr.azk8s.cn/google-containers/kube-apiserver            v1.16.2            
gcr.azk8s.cn/google-containers/kube-controller-manager   v1.16.2             
gcr.azk8s.cn/google-containers/etcd                      3.3.15-0            
gcr.azk8s.cn/google-containers/coredns                   1.6.2               
gcr.azk8s.cn/google-containers/pause                     3.1                

拉取阿里云镜像:
举个例子(拉取kube-proxy镜像)：

docker pull registry.cn-hangzhou.aliyuncs.com/snail-gao/k8s:kube-proxy
docker tag registry.cn-hangzhou.aliyuncs.com/snail-gao/k8s:kube-proxy gcr.azk8s.cn/google-containers/kube-proxy:v1.16.2

QA:

Solution:

$ echo 1 > /proc/sys/net/bridge/bridge-nf-call-iptables
$ echo 1 > /proc/sys/net/bridge/bridge-nf-call-ip6tables

Feel Kubernetes

既然已经通过Minikube搭建了单节点的Kubernetes，感受一些组件的存在以及操作

Viewing Connection Information

kubectl config view
kubectl config get-contexts
kubectl cluster-info

Experience Pod
(1) create pod_nginx.yaml

apiVersion: v1
kind: Pod
metadata:
  name: nginx
  labels:
    app: nginx
spec:
  containers:
  - name: nginx
    image: nginx
    ports:
    - containerPort: 80

(2) create a pod according to pod_nginx.yaml file

kubectl apply -f pod_nginx.yaml

(3) View pod

kubectl get pods
kubectl get pods -o wide
kubectl describe pod nginx

(4) into the container nginx

# kubectl进入
kubectl exec -it nginx bash
# 通过docker进入
minikube ssh
docker ps
docker exec -it containerid bash

(5) access nginx, port forwarding

# 若在minikube中，直接访问
# 若在物理主机上，要做端口转发
kubectl port-forward nginx 8080:80

(6) Delete pod

kubectl delete -f pod_nginx.yaml

CentOS

Guess you like