1. 核心组件node
2. kubernetes 经常使用命令nginx
kubectl cluster-info
kubectl run nginx-test --replicas=3 --labels='app=nginx' --image=nginx:latest --port=80 #使用kubectl run命令启动一个pod,自定义名称为nginx-test,启动了3个pod副本,并给pod打上标签app=nginx,这个pod拉取docker镜像nginx:latest,开放端口80
kubectl get po kubectl get pod kubectl get pods
kubectl get pods -l app kubectl get pods -l app=nginx
kubectl get pods -l app=nginx -o wide
kubectl describe pods <podname>
kubectl get deploy
kubectl get replicaset kubectl get rs
kubectl expose deploy nginx-test --port=8080 --target-port=80 --name=nginx-service #k8s集群经过deploy来管理,导出名为nginx-test的deploy,为其建立名为nginx-service的服务开放给外界,使外界能经过nginx-service来和nginx-test交互,外部端口为8080,内部端口为80
kubectl get svc
kubectl log <podname> #查看指定pod内容器的日志 kubectl log -l app=nginx #查看标签lable为app=nginx下的pod的容器日志
kubectl scale deploy nginx-test --replicas10 #经过kubectl scale将名为nginx-test的deploy从新定义有10个副本pod
kubectl rollout status deploy nginx-test
pod和rs不能直接被删除,其被deploy控制,即便删除了某一pod,也会建立新的pod来对应配置pod副本数量,要想删除pod,只能用删除其deploy来删除,或者变动pod副本配置缩容(如上)git
kubectl delete deploy nginx-test #删除部署的deploy(删除其对于的pod和rs) kubectl delete svc nginx-service #删除建立的service
3. 应用建立部署yaml文件 github
tomsun28以后的k8s应用部署修改,都肯定使用apply形式部署更新,使用git版本控制建立资源,好处多多docker
kubectl apply -f nginx.yaml ##更新式建立资源,若是不存在此资源则建立,如存在改动则调整资源(推荐) kubectl delete -f nginx.yaml #资源(pod,deployment,service,replicaset...)删除销毁
nginx.yaml :
数据库
# ----------------------nginx--------------------- # # ------nginx deployment------ # kind: Deployment apiVersion: apps/v1beta2 metadata: name: nginx-deployment labels: app: nginx spec: replicas: 3 selector: matchLabels: app: nginx template: metadata: labels: app: nginx spec: containers: - name: nginx image: 192.167.2.144:5000/nginx:latest ports: - containerPort: 80 --- # -------nginx-service--------- # apiVersion: v1 kind: Service metadata: name: nginx-service spec: type: NodePort ports: - port: 80 targetPort: 80 nodePort: 30001 selector: app: nginx
kubectl apply -f nginx.yaml
ubuntu
ubantu下用kubeadm搭建kubernetes集群 api
官方安装教程服务器
# apt-get update && apt-get install -y apt-transport-https
app
# curl https://mirrors.aliyun.com/kubernetes/apt/doc/apt-key.gpg | apt-key add -
# cat << EOF >/etc/apt/sources.list.d/kubernetes.list deb https://mirrors.aliyun.com/kubernetes/apt/ kubernetes-xenial main EOF
# apt-get update && apt-get install -y kubelet kubeadm kubectl
指定版本为:
# apt-get update && apt-get install -y kubelet=1.11.1-00 kubeadm=1.11.1-00 kubectl=1.11.1-00
sudo swapoff -a
# kubeadm config images list ##查询当前kubeadm版本所需images # kubeadm config images pull ##拉取这些images k8s=v1.11.1所对应镜像及版本: k8s.gcr.io/coredns:1.1.3 k8s.gcr.io/etcd-amd64:3.2.18 k8s.gcr.io/kube-apiserver-amd64:v1.11.1 k8s.gcr.io/kube-controller-manager-amd64:v1.11.1 k8s.gcr.io/kube-proxy-amd64:v1.11.1 k8s.gcr.io/kube-scheduler-amd64:v1.11.1 k8s.gcr.io/pause:3.1
kubeadm init --kubernetes-version=v1.11.1 --apiserver-advertise-address=116.196.81.106 --pod-network-cidr=10.244.0.0/16
--apiserver-advertise-address=<ip> 指定apiserver的访问ip,ip默认为当前虚拟机的默认网卡ip. 当ip为内网地址时,k8s集群只能搭建在网段内部,若是有需求经过外网ip来操做apiserver,须要在启动集群时添加可信参数 --apiserver-cert-extra-sans=116.196.81.106 将外网的ip添加进去. 当ip为外网地址时,能够实现不一样网段的虚拟机组成k8s集群(目前我就是这个须要,一个京东云一个阿里云),暂时还没测这种跨公网的集群性能咋样,毕竟考虑到网速带宽等不如内网,但有一个优点就是能够整合不一样的资源,不被同一云商所束缚,jd挂了ali还能够用.
kubeadm join 192.168.0.3:6443 --token q6gmgt.3dakenwttapw4n2o --discovery-token-ca-cert-hash sha256:dbf69119e962456c239c5f7821ee9a0db46fb643fc40da8776d4e032de072085
mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config
或者(root user): export KUBECONFIG=/etc/kubernetes/admin.conf
/proc/sys/net/bridge/bridge-nf-call-iptables
为1sysctl net.bridge.bridge-nf-call-iptables=1
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/c5d10c8/Documentation/kube-flannel.yml
kubeadm init --pod-network-cidr=10.244.0.0/16
kubectl taint nodes --all node-role.kubernetes.io/master-
kubeadm join --token <token> <master-ip>:<master-port> --discovery-token-ca-cert-hash sha256:<hash>
kubectl get nodes
kubeadm reset
参考来自
kubernetes官方部署文档
转载请注明 from tomsun28