Kubernetes 介绍

安装

  • Minikube base on VM

  • microk8s for Linux

  • Kubeadm

  • a

  • Rancher

网络

使Service暴露应用

  • ClusterIP（默认）

    • 仅在集群内部IP上暴露服务，此类型使Service只能从群集中访问。

  • NodePort

    • 通过每个 Node 上的 IP 和静态端口（NodePort）暴露服务（30000~）

  • LoadBalancer

    • 使用云提供商的负载均衡器

  • Ingress

  • ****

  • ExternalName

架构图

下载

  • wget https://dl.k8s.io/v1.12.0-rc.2/kubernetes-server-linux-amd64.tar.gz 下载地址

Installing kubeadm, kubelet and kubectl

  • 镜像配置

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

  • 关闭防火墙

  • 安装

# Set SELinux in permissive mode (effectively disabling it)
setenforce 0
sed -i 's/^SELINUX=enforcing$/SELINUX=permissive/' /etc/selinux/config
sed -i 's/^SELINUX=disabled$/SELINUX=permissive/' /etc/selinux/config


yum install -y kubelet kubeadm kubectl --disableexcludes=kubernetes
systemctl enable kubelet && systemctl start kubelet

  • Note

cat <<EOF >  /etc/sysctl.d/k8s.conf
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
EOF
sysctl --system

  • 初始化 kubeladm

kubeadm init
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