Alternatives and detailed information of k8s

linux 环境

发行版 centos
版本 7(x86_64-Minimal-1810)
阿里云os下载地址
VirtualBox 安装虚拟机, cpu 设置核数大于2
设置hosts

# vim /etc/hosts
192.168.1.77   master
192.168.1.223  node1

禁用防火墙

# systemctl stop firewalld
# systemctl disable firewalld

禁用SELINUX

# setenforce 0
# vim /etc/selinux/config
# 设置 SELINUX=disabled

k8s.conf

vim /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1

执行如下命令使修改生效

# modprobe br_netfilter
# sysctl -p /etc/sysctl.d/k8s.conf

安装docker

cd /etc/yum.repos.d && wget https://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo
yum list docker-ce.x86_64 --showduplicates | sort -r

#   Loading mirror speeds from cached hostfile
#   Loaded plugins: branch, fastestmirror, langpacks
#   docker-ce.x86_64            17.03.1.ce-1.el7.centos            docker-ce-stable
#   docker-ce.x86_64            17.03.1.ce-1.el7.centos            @docker-ce-stable
#   docker-ce.x86_64            17.03.0.ce-1.el7.centos            docker-ce-stable
#   Available Packages

选择你想要得版本，我使用了最新版本

# yum -y  install docker-ce

设置自启动

# systemctl enable docker && systemctl start docker

安装 kubeadm、kubelet、kubectl K8S_VERSION=v1.15.3

# cat <<EOF > /etc/yum.repos.d/kubernetes.repo
[kubernetes]
name=Kubernetes
baseurl=http://mirrors.aliyun.com/kubernetes/yum/repos/kubernetes-el7-x86_64
enabled=1
gpgcheck=0
repo_gpgcheck=0
gpgkey=http://mirrors.aliyun.com/kubernetes/yum/doc/yum-key.gpg
        http://mirrors.aliyun.com/kubernetes/yum/doc/rpm-package-key.gpg
EOF

# yum install -y  kubeadm kubelet  kubectl 
# kubelet --version //v1.15.3

kubelet启动设置

# vim /etc/sysconfig/kubelet  
  KUBELET_EXTRA_ARGS="--fail-swap-on=false"
# systemctl daemon-reload

master节点设置

下载相关镜像

#!/bin/bash
# master 节点 shell
K8S_VERSION=v1.15.3
ETCD_VERSION=3.3.10
DNS_VERSION=1.3.1
PAUSE_VERSION=3.1
FLANNEL_VERSION=v0.11.0-amd64
DASHBOARD_VERSION=v1.10.1

// 下载镜像
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:$K8S_VERSION
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:$K8S_VERSION
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:$K8S_VERSION
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:$K8S_VERSION
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause:$PAUSE_VERSION
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:$ETCD_VERSION
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:$DNS_VERSION
docker pull jmgao1983/flannel:$FLANNEL_VERSION
docker pull siriuszg/kubernetes-dashboard-amd64:$DASHBOARD_VERSION

# 修改tag
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:$K8S_VERSION           k8s.gcr.io/kube-apiserver:$K8S_VERSION
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:$K8S_VERSION  k8s.gcr.io/kube-controller-manager:$K8S_VERSION
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:$K8S_VERSION           k8s.gcr.io/kube-scheduler:$K8S_VERSION
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:$K8S_VERSION               k8s.gcr.io/kube-proxy:$K8S_VERSION
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause:$PAUSE_VERSION                  k8s.gcr.io/pause:$PAUSE_VERSION
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:$ETCD_VERSION                    k8s.gcr.io/etcd:$ETCD_VERSION
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:$DNS_VERSION  			     k8s.gcr.io/coredns:$DNS_VERSION
docker tag jmgao1983/flannel:$FLANNEL_VERSION                              							 quay.io/coreos/flannel:$FLANNEL_VERSION
docker tag siriuszg/kubernetes-dashboard-amd64:$DASHBOARD_VERSION                                    k8s.gcr.io/kubernetes-dashboard-amd64:$DASHBOARD_VERSION

#删除冗余的images
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/kube-apiserver:$K8S_VERSION
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/kube-controller-manager:$K8S_VERSION
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/kube-scheduler:$K8S_VERSION
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:$K8S_VERSION
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/pause:$PAUSE_VERSION
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/etcd:$ETCD_VERSION
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/coredns:$DNS_VERSION
docker rmi jmgao1983/flannel:$FLANNEL_VERSION
docker rmi siriuszg/kubernetes-dashboard-amd64:$DASHBOARD_VERSION

集群安装初始化

# kubeadm init --kubernetes-version=v1.15.3 --pod-network-cidr=10.244.0.0/16 --ignore-preflight-errors=Swap 

# 出现如下信息安装成功
Your Kubernetes master has initialized successfully!

To start using your cluster, you need to run the following as a regular user:

  mkdir -p $HOME/.kube
  sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config
  sudo chown $(id -u):$(id -g) $HOME/.kube/config

You should now deploy a pod network to the cluster.
Run "kubectl apply -f [podnetwork].yaml" with one of the options listed at:
  https://kubernetes.io/docs/concepts/cluster-administration/addons/

You can now join any number of machines by running the following on each node
as root:

kubeadm join 192.168.1.16:6443 --token 981it6.k4kqs2i73e1bfd1p \
    --discovery-token-ca-cert-hash sha256:5cc5c1c2ace7b720a178840c951b2a05c679d26b8d6a1cfc81aa7e006e6a6ef9

查看集群健康状况

# kubectl get cs

集群安装过程中遇到问题，重置操作

# kubeadm reset

安装网络插件

# kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml

查看集群中的组件运行状态

# kubectl get pods --all-namespaces

node节点设置

下载镜像

#!/bin/bash
# node 节点 shell
K8S_VERSION=v1.15.3
ETCD_VERSION=3.3.10
DNS_VERSION=1.3.1
PAUSE_VERSION=3.1
FLANNEL_VERSION=v0.11.0-amd64
DASHBOARD_VERSION=v1.10.1

## node 安装插件
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:$K8S_VERSION
docker pull registry.cn-hangzhou.aliyuncs.com/google_containers/pause:$PAUSE_VERSION
docker pull jmgao1983/flannel:v0.11.0-amd64
docker pull siriuszg/kubernetes-dashboard-amd64:$DASHBOARD_VERSION


docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:$K8S_VERSION  k8s.gcr.io/kube-proxy:$K8S_VERSION
docker tag registry.cn-hangzhou.aliyuncs.com/google_containers/pause:$PAUSE_VERSION     k8s.gcr.io/pause:$PAUSE_VERSION
docker tag jmgao1983/flannel:$FLANNEL_VERSION                                           quay.io/coreos/flannel:$FLANNEL_VERSION
docker tag siriuszg/kubernetes-dashboard-amd64:$DASHBOARD_VERSION                       k8s.gcr.io/kubernetes-dashboard-amd64:$DASHBOARD_VERSION


docker rmi jmgao1983/flannel:$FLANNEL_VERSION
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/pause:$PAUSE_VERSION
docker rmi registry.cn-hangzhou.aliyuncs.com/google_containers/kube-proxy:$K8S_VERSION
docker rmi siriuszg/kubernetes-dashboard-amd64:$DASHBOARD_VERSION

加入节点

# kubeadm join 192.168.1.77:6443 --token 5oi47o.stqe7c5w1qo7wcr0 \
    --discovery-token-ca-cert-hash sha256:2387b0db19fa83e57ac094bf27a870a0381082c47c0f08bf9ef6277e24593fcd --ignore-preflight-errors=Swap
    
#出现下面就ok了, master节点， kubectl get nodes

This node has joined the cluster:
* Certificate signing request was sent to master and a response
  was received.
* The Kubelet was informed of the new secure connection details.

Run 'kubectl get nodes' on the master to see this node join the cluster.

安装 dashboard组件

集群配置，生成浏览器证书

# 生成client-certificate-data
grep 'client-certificate-data' ~/.kube/config | head -n 1 | awk '{print $2}' | base64 -d >> kubecfg.crt

# 生成client-key-data
grep 'client-key-data' ~/.kube/config | head -n 1 | awk '{print $2}' | base64 -d >> kubecfg.key

# 生成p12
openssl pkcs12 -export -clcerts -inkey kubecfg.key -in kubecfg.crt -out kubecfg.p12 -name "kubernetes-client"

# 导入证书后浏览器重启

创建admin-user账号，并放在kube-system名称空间下

# vim admin-user.yaml

apiVersion: v1
kind: ServiceAccount
metadata:
  name: admin-user
  namespace: kube-system
  
#kubectl create -f admin-user.yaml

绑定角色

# vim admin-user-role-binding.yaml

apiVersion: rbac.authorization.k8s.io/v1beta1
kind: ClusterRoleBinding
metadata:
  name: admin-user
roleRef:
  apiGroup: rbac.authorization.k8s.io
  kind: ClusterRole
  name: cluster-admin
subjects:
- kind: ServiceAccount
  name: admin-user
  namespace: kube-system
  
# kubectl create -f  admin-user-role-binding.yaml

获取Token

# kubectl -n kube-system describe secret $(kubectl -n kube-system get secret | grep admin-user | awk '{print $1}')

登录dashboard

https://192.168.255.130:6443/api/v1/namespaces/kube-system/services/https:kubernetes-dashboard:/proxy/

ingress 使用https

# yaml
apiVersion: v1
data:
  tls.crt:
  tls.key:
kind: Secret
metadata:
  name: test-tls  //密钥名字
  namespace: default
type: kubernetes.io/tls

# base64 encode the key and certificate data
cat tls.crt | base64
cat tls.key | base64


# yaml
apiVersion: v1
data:
  tls.crt: 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
  tls.key: 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
kind: Secret
metadata:
  name: test-tls
  namespace: default
type: kubernetes.io/tls

# 生成 tls 密钥
kubectl create -f tls.yaml

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G-Bruin / k8s

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linux 环境

安装docker

master节点设置

node节点设置

安装 dashboard组件

ingress 使用https