Kubernetes二进制部署

环境准备

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

二：K8S部署

Master:192.168.162.10/24  kube-apiserver kube-controller-manager kube-scheduler etcd
Node01:192.168.162.30/24 kubelet kube-proxy docker flannel etcd
Node02:192.168.162.40/24 kubelet kube-proxy docker flannel etcd

1、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

2、下载证书制作工具

[root@localhost k8s]# vim cfssl.sh
curl -L https://pkg.cfssl.org/R1.2/cfssl_linux-amd64 -o /usr/local/bin/cfssl
curl -L https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64 -o /usr/local/bin/cfssljson
curl -L https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64 -o /usr/local/bin/cfssl-certinfo
chmod +x /usr/local/bin/cfssl /usr/local/bin/cfssljson /usr/local/bin/cfssl-certinfo
//下载cfssl官方包
[root@localhost k8s]# bash cfssl.sh
[root@localhost k8s]# ls /usr/local/bin/
cfssl  cfssl-certinfo  cfssljson

3、开始制作证书

3.1、定义ca证书

[root@bogon ~/k8s/etcd-cert] # cat > ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "www": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"     
        ]  
      } 
    }         
  }
}
EOF

3.2、实现证书签名

cat > ca-csr.json <<EOF 
{   
    "CN": "etcd CA",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
        }
    ]
}
EOF

3.3、生产证书，生成ca-key.pem ca.pem

cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

2020/01/13 16:32:56 [INFO] generating a new CA key and certificate from CSR
2020/01/13 16:32:56 [INFO] generate received request
2020/01/13 16:32:56 [INFO] received CSR
2020/01/13 16:32:56 [INFO] generating key: rsa-2048
2020/01/13 16:32:56 [INFO] encoded CSR
2020/01/13 16:32:56 [INFO] signed certificate with serial number 595395605361409801445623232629543954602649157326

3.4、指定etcd三个节点之间的通信验证

cat > server-csr.json <<EOF
{
    "CN": "etcd",
    "hosts": [
    "192.168.162.10",
    "192.168.162.30",
    "192.168.162.40"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}
EOF

3.5、生成ETCD证书 server-key.pem server.pem

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server

2020/01/13 17:01:30 [INFO] generate received request
2020/01/13 17:01:30 [INFO] received CSR
2020/01/13 17:01:30 [INFO] generating key: rsa-2048
2020/01/13 17:01:30 [INFO] encoded CSR
2020/01/13 17:01:30 [INFO] signed certificate with serial number 202782620910318985225034109831178600652439985681
2020/01/13 17:01:30 [WARNING] This certificate lacks a "hosts" field. This makes it unsuitable for
websites. For more information see the Baseline Requirements for the Issuance and Management
of Publicly-Trusted Certificates, v.1.1.6, from the CA/Browser Forum (https://cabforum.org);
specifically, section 10.2.3 ("Information Requirements").

4、ETCD 二进制包地址

https://github.com/etcd-io/etcd/releases 	#二进制包地址

将包复制到centos7中

[root@bogon ~/k8s] # ls
etcd-cert  etcd.sh  etcd-v3.3.10-linux-amd64.tar.gz
[root@bogon ~/k8s] # tar zxvf etcd-v3.3.10-linux-amd64.tar.gz 
[root@localhost k8s]# ls etcd-v3.3.10-linux-amd64
Documentation  etcd  etcdctl  README-etcdctl.md  README.md  READMEv2-etcdctl.md

[root@localhost k8s]# mkdir /opt/etcd/{cfg,bin,ssl} -p    //配置文件，命令文件，证书

[root@localhost k8s]# mv etcd-v3.3.10-linux-amd64/etcd etcd-v3.3.10-linux-amd64/etcdctl /opt/etcd/bin/

4.1、证书拷贝

[root@localhost k8s]# cp etcd-cert/*.pem /opt/etcd/ssl/

5、拷贝证书去其他节点

[root@localhost k8s]# scp -r /opt/etcd/ root@192.168.162.30:/opt/
[root@localhost k8s]# scp -r /opt/etcd/ root@192.168.162.40:/opt

6、启动脚本拷贝其他节点

[root@localhost k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.162.30:/usr/lib/systemd/system/
[root@localhost k8s]# scp /usr/lib/systemd/system/etcd.service root@192.168.162.40:/usr/lib/systemd/system/

7、在node01节点修改

[root@localhost ~]# vim /opt/etcd/cfg/etcd


#[Member]
ETCD_NAME="etcd02"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.162.30:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.162.30:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.162.30:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.162.30:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.162.10:2380,etcd02=https://192.168.162.30:2380,etcd03=https://192.168.162.40:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

启动
[root@localhost ssl]# systemctl start etcd
[root@localhost ssl]# systemctl status etcd

8、在node02节点修改

#[Member]
ETCD_NAME="etcd03"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.162.40:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.162.40:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.162.40:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.162.40:2379"
ETCD_INITIAL_CLUSTER="etcd01=https://192.168.162.10:2380,etcd02=https://192.168.162.30:2380,etcd03=https://192.168.162.40:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

启动
[root@localhost ssl]# systemctl start etcd
[root@localhost ssl]# systemctl status etcd

9、检查群集状态

[root@bogon /opt/etcd/ssl] # /opt/etcd/bin/etcdctl --ca-file=ca.pem --cert-file=server.pem --key-file=server-key.pem --endpoints="https://192.168.162.10:2379,https://192.168.162.30:2379,https://192.168.162.40:2379" cluster-health