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一、K8S三种部署方式

1、minkube

Minikube是-一个工具，可以在本地快速运行一-个单点的Kubernetes，仅用于尝试Kubernetes或日常开发的用户使用。

部署地址: https://kubernetes.io/docs/setup/minikube/

2、kubeadm

Kubeadm也是一一个 工具，提供kubeadm init和kubeadm join,用于快速部署Kubernetes集群。部署地址:

https://kubernetes.io/docs/reference/setup-tools/kubeadm/kubeadm/

3、二进制包

推荐，从官方下载发行版的二进制包，手动部署每个组件，组成Kubernetes集群。下 载地址:

https://github.com/kubernetes/kubernetes/releases

二、Kubernetes单节点部署

环境部署

官网地址：https://github.com/kubernetes/kubernetes/releases?after=v1.13.1 K8S部署

Master:192.168.177.33/24  kube-apiserver kube-controller-manager kube-scheduler etcdNode01:192.168.177.8/24 kubelet kube-proxy docker flannel etcdNode02:192.168.177.18/24 kubelet kube-proxy docker flannel etcd

master操作

[root@localhost ~]# mkdir k8s[root@localhost ~]# cd k8s/[root@localhost k8s]# ls    //从宿主机拖进来etcd-cert.sh  etcd.sh[root@localhost k8s]# mkdir etcd-cert[root@localhost k8s]# mv etcd-cert.sh etcd-cert

下载证书制作工具

[root@localhost k8s]# vim cfssl.shcurl -L https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -o /usr/local/bin/cfsslcurl -L https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -o /usr/local/bin/cfssljsoncurl -L https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -o /usr/local/bin/cfssl-certinfochmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson /usr/local/bin/cfssl-certinfo

下载证书制作工具

[root@master1 k8s]# bash cfssl.sh[root@master1 k8s]# ls /usr/local/bin/cfssl  cfssl-certinfo  cfssljson

下载cfssl官方包

[root@master1 k8s]# bash cfssl.sh[root@master1 k8s]# ls /usr/local/bin/cfssl  cfssl-certinfo  cfssljson

开始制作证书

//cfssl 生成证书工具 ， cfssljson通过传入json文件生成证书，cfssl-certinfo查看证书信息 定义ca证书

[root@master1 ~]# cd  /root/k8s/etcd-certcat > ca-config.json <

实现证书签名

[root@master1 ~]# cd  /root/k8s/etcd-certcat > ca-csr.json <

生产证书，生成ca-key.pem ca.pem

[root@master1 etcd-cert]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -2021/04/12 22:53:30 [INFO] generating a new CA key and certificate from CSR2021/04/12 22:53:30 [INFO] generate received request2021/04/12 22:53:30 [INFO] received CSR2021/04/12 22:53:30 [INFO] generating key: rsa-20482021/04/12 22:53:30 [INFO] encoded CSR2021/04/12 22:53:30 [INFO] signed certificate with serial number 397125830926114737701706075410049927608256756699

指定etcd三个节点之间的通信验证

[root@master1 ~]# cd  /root/k8s/etcd-certcat > server-csr.json <

生成ETCD证书 server-key.pem server.pem

[root@master1 ~]# cd  /root/k8s/etcd-cert[root@master1 etcd-cert]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server2021/04/12 22:57:45 [INFO] generate received request2021/04/12 22:57:45 [INFO] received CSR2021/04/12 22:57:45 [INFO] generating key: rsa-20482021/04/12 22:57:45 [INFO] encoded CSR2021/04/12 22:57:45 [INFO] signed certificate with serial number 2193423817489917288512841846675124083783365848592021/04/10 22:57:45 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable forwebsites. For more information see the Baseline Requirements for the Issuance and Managementof Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);specifically, section 10.2.3 ("Information Requirements").[root@master1 etcd-cert]# lsca-config.json  ca-key.pem    server.csr       server.pemca.csr          ca.pem        server-csr.jsonca-csr.json     etcd-cert.sh  server-key.pem

ETCD二进制包地址

https://github.com/etcd-io/etcd/releases 将以上三个压缩包上传到 /root/k8s目录中

[root@master1 etcd-cert]# cd ~/k8s/[root@master1 k8s]# lscfssl.sh   etcd.sh                          flannel-v0.10.0-linux-amd64.tar.gzetcd-cert  etcd-v3.3.10-linux-amd64.tar.gz  kubernetes-server-linux-amd64.tar.gz[root@master1 k8s]# tar zxvf etcd-v3.3.10-linux-amd64.tar.gz[root@master1 k8s]# ls etcd-v3.3.10-linux-amd64Documentation  etcdctl            README.mdetcd           README-etcdctl.md  READMEv2-etcdctl.md[root@master1 k8s]#  mkdir /opt/etcd/{cfg,bin,ssl} -p    //cfg:配置文件，bin:命令文件，ssl:证书[root@master1 k8s]# mv etcd-v3.3.10-linux-amd64/etcd etcd-v3.3.10-linux-amd64/etcdctl /opt/etcd/bin/[root@master1 k8s]# ls /opt/etcd/bin/etcd  etcdctl

证书拷贝

[root@master1 k8s]# cp etcd-cert/*.pem /opt/etcd/ssl/[root@master1 k8s]# ls /opt/etcd/ssl/ca-key.pem  ca.pem  server-key.pem  server.pem

进入卡住状态等待其他节点加入

[root@master1 k8s]# bash etcd.sh etcd01 192.168.177.33 etcd02=https://192.168.177.8:2380,etcd03=https://192.168.177.18:2380

新开master1的一个会话，会发现etcd进程已经开启

[root@localhost ~]# ps -ef | grep etcd

拷贝证书去其他节点

[root@master1 k8s]# scp -r /opt/etcd/ root@192.168.177.8:/opt/[root@master1 k8s]# scp -r /opt/etcd/ root@192.168.177.18:/opt/

启动脚本拷贝其他节点

[root@master1 ~]# scp /usr/lib/systemd/system/etcd.service root@192.168.177.8:/usr/lib/systemd/system/[root@master1 ~]# scp /usr/lib/systemd/system/etcd.service root@192.168.177.18:/usr/lib/systemd/system/

在node1节点与node2节点均需修改

###在node1节点修改[root@node1 system]# cd /opt/etcd/cfg/[root@node1 cfg]# vim etcd #[Member]ETCD_NAME="etcd02"ETCD_DATA_DIR="/var/lib/etcd/default.etcd"ETCD_LISTEN_PEER_URLS="https://192.168.177.8:2380"ETCD_LISTEN_CLIENT_URLS="https://192.168.177.8:2379"#[Clustering]ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.177.8:2380"ETCD_ADVERTISE_CLIENT_URLS="https://192.168.177.8:2379"ETCD_INITIAL_CLUSTER="etcd01=https://192.168.177.33:2380,etcd02=https://192.168.177.8:2380,etcd03=https://192.168.177.18:2380"ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"ETCD_INITIAL_CLUSTER_STATE="new"###在node2节点修改[root@node2 system]# cd /opt/etcd/cfg/[root@node2 cfg]# vim etcd #[Member]ETCD_NAME="etcd03"ETCD_DATA_DIR="/var/lib/etcd/default.etcd"ETCD_LISTEN_PEER_URLS="https://192.168.177.18:2380"ETCD_LISTEN_CLIENT_URLS="https://192.168.177.18:2379"#[Clustering]ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.177.18:2380"ETCD_ADVERTISE_CLIENT_URLS="https://192.168.177.18:2379"ETCD_INITIAL_CLUSTER="etcd01=https://192.168.177.33:2380,etcd02=https://192.168.177.8:2380,etcd03=https://192.168.177.18:2380"ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"ETCD_INITIAL_CLUSTER_STATE="new"

启动

#首先在master1节点上进行启动[root@master1 ~]# cd /root/k8s/[root@master1 k8s]# bash etcd.sh etcd01 192.168.177.33 etcd02=https://192.168.177.8:2380,etcd03=https://192.168.177.18:2380#接着在node1和node2节点分别进行启动[root@node1 cfg]# systemctl start etcd.service [root@node2 cfg]# systemctl start etcd.service

检查群集状态，在master1上进行检查

[root@master1 ~]# cd /root/k8s/etcd-cert/[root@master1 etcd-cert]# /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.177.33:2379,https://192.168.177.8:2379,https://192.168.177.18:2379" cluster-health 	member 995575c0c650e89b is healthy: got healthy result from https://192.168.177.8:2379member 9abd0b70bb7a8d9a is healthy: got healthy result from https://192.168.177.33:2379member acca2e49c9c76117 is healthy: got healthy result from https://192.168.177.18:2379cluster is healthy

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