锐客网

  1. 首页 > 睿知 > it技术 > >

Kubernetes|搭建Kubernetes集群基于calico网络插件

Kubernetes

实验环境

IP 备注 系统
192.168.1.10 master centos7
192.168.1.20 node1 centos7
192.168.1.30 node2 centos7
【Kubernetes|搭建Kubernetes集群基于calico网络插件】版本信息
  • docker 18.09.0
  • k8s v1.20.2
更改主机名
master
[root@localhost ~]# hostname master [root@localhost ~]# bash [root@master ~]#

node1
[root@localhost ~]# hostname node1 [root@localhost ~]# bash [root@node1 ~]#

node2
[root@localhost ~]# hostname node2 [root@localhost ~]# bash [root@node2 ~]#

免密登录 master
[root@master ~]# vi /etc/hosts #末尾添加 192.168.1.10 master 192.168.1.20 node1 192.168.1.30 node2[root@master ~]# ssh-keygen#一直回车 [root@master ~]# ssh-copy-id -i master [root@master ~]# ssh-copy-id -i node1 [root@master ~]# ssh-copy-id -i node2#将hosts文件传给node1和node2 [root@master ~]# scp /etc/hosts node1:/etc/hosts hosts100%21715.2KB/s00:00 [root@master ~]# scp /etc/hosts node2:/etc/hosts hosts100%21729.7KB/s00:00

更新并安装依赖
yum -y update yum install -y conntrack ipvsadm ipset jq sysstat curl iptables libseccomp

安装docker 在每一台机器上都安装好Docker，版本为18.09.0
01 安装必要的依赖 sudo yum install -y yum-utils device-mapper-persistent-data lvm2 02 设置docker仓库 sudo yum-config-manager --add-repo http://mirrors.aliyun.com/docker-ce/linux/centos/docker-ce.repo 【设置要设置一下阿里云镜像加速器】 登录阿里云 https://cr.console.aliyun.com/cn-hangzhou/instances/mirrors 容器镜像服务中查看，参见下图 sudo mkdir -p /etc/docker sudo tee /etc/docker/daemon.json <<-'EOF' { "registry-mirrors": ["https://******.mirror.aliyuncs.com"] } EOF sudo systemctl daemon-reload03 安装dockeryum install -y docker-ce-18.09.0 docker-ce-cli-18.09.0 containerd.io04 启动docker sudo systemctl start docker && sudo systemctl enable docker

Kubernetes|搭建Kubernetes集群基于calico网络插件
文章图片

系统基础前提配置
# (1)关闭防火墙 systemctl stop firewalld && systemctl disable firewalld# (2)关闭selinux setenforce 0 sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config# (3)关闭swap swapoff -a sed -i '/swap/s/^\(.*\)$/#\1/g' /etc/fstab# (4)配置iptables的ACCEPT规则 iptables -F && iptables -X && iptables -F -t nat && iptables -X -t nat && iptables -P FORWARD ACCEPT# (5)设置系统参数 cat </etc/sysctl.d/k8s.conf net.bridge.bridge-nf-call-ip6tables = 1 net.bridge.bridge-nf-call-iptables = 1 EOFsysctl --system

Installing kubeadm, kubelet and kubectl （1）配置yum源
cat < /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

(2)安装kubeadm&kubelet&kubectl
yum install -y kubeadm kubelet kubectl -y

(3)docker和k8s设置同一个cgroup
# docker vi /etc/docker/daemon.json "exec-opts": ["native.cgroupdriver=systemd"],systemctl restart docker# kubelet，这边如果发现输出directory not exist，也说明是没问题的，大家继续往下进行即可 sed -i "s/cgroup-driver=systemd/cgroup-driver=cgroupfs/g" /etc/systemd/system/kubelet.service.d/10-kubeadm.conf systemctl enable kubelet && systemctl start kubelet

kube init初始化master
# 此操作只在master节点执行 查看日志，记录join信息 kubeadm init --image-repository registry.aliyuncs.com/google_containers --kubernetes-version v1.20.2 --apiserver-advertise-address 192.168.1.10 --pod-network-cidr=10.244.0.0/16 #输出信息 ····· Your Kubernetes control-plane 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/configAlternatively, if you are the root user, you can run:export KUBECONFIG=/etc/kubernetes/admin.confYou 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/Then you can join any number of worker nodes by running the following on each as root:kubeadm join 192.168.1.10:6443 --token 1ha7wh.gs6i1z30tpmdm3or \ --discovery-token-ca-cert-hash sha256:06324a09f5e51f4a012f24041d94e73385fe0ac1a2e98cc114005cdc66c9cae2 ····· 【若要重新初始化集群状态：kubeadm reset，然后再进行上述操作】

记得保存好最后kubeadm join的信息
(3)根据日志提示
mkdir -p $HOME/.kube sudo cp -i /etc/kubernetes/admin.conf $HOME/.kube/config sudo chown $(id -u):$(id -g) $HOME/.kube/config

部署calico网络插件
选择网络插件：https://kubernetes.io/docs/concepts/cluster-administration/addons/
calico网络插件：https://docs.projectcalico.org/v3.9/getting-started/kubernetes/
calico，同样在master节点上操作
# 在k8s中安装calico kubectl apply -f https://docs.projectcalico.org/v3.9/manifests/calico.yaml# 确认一下calico是否安装成功 kubectl get pods --all-namespaces -w

Kubernetes|搭建Kubernetes集群基于calico网络插件
文章图片

kube join 记得保存初始化master节点的最后打印信息
（1）node1和node2执行
kubeadm join 192.168.1.10:6443 --token 1ha7wh.gs6i1z30tpmdm3or \ --discovery-token-ca-cert-hash sha256:06324a09f5e51f4a012f24041d94e73385fe0ac1a2e98cc114005cdc66c9cae2

（2）master节点检查集群信息
[root@master ~]# kubectl get nodes NAMESTATUSROLESAGEVERSION masterReadycontrol-plane,master5m35sv1.20.2 node1Ready64sv1.20.2 node2Ready61sv1.20.2

创建pod测试
cat > pod_nginx_rs.yaml <

部署yaml文件
kubectl apply -f pod_nginx_rs.yaml

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

通过rs将pod扩容
kubectl scale rs nginx --replicas=5 kubectl get pods -o wide

删除pod
kubectl delete -f pod_nginx_rs.yaml

    推荐阅读


    上一篇：k8s|kubernetes1.20搭建笔记

    下一篇：Windows|Maven项目POM文件参数详解