1、操作系统初始化配置（全部机器操作）

systemctl stop firewalld
systemctl disable firewalld

关闭selinux

sed -i 's/enforcing/disabled/' /etc/selinux/config  # 永久
setenforce 0  # 临时

关闭swap

swapoff -a  # 临时
sed -ri 's/.*swap.*/#&/' /etc/fstab    # 永久

根据规划设置主机名

hostnamectl set-hostname <hostname>

cat >> /etc/hosts << EOF
192.168.1.71 etcd01
192.168.1.72 etcd02
192.168.1.73 etcd03
192.168.1.74 k8s-master01
192.168.1.75 k8s-master02
192.168.1.76 k8s-node01
192.168.1.77 k8s-node02
EOF

将桥接的IPv4流量传递到iptables的链

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

生效

sysctl --system

时间同步

yum install ntpdate -y
ntpdate time.windows.com

2、部署Etcd集群(171、172、173机器操作)

准备cfssl证书生成工具

wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64
mv cfssl_linux-amd64 /usr/local/bin/cfssl
mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
mv cfssl-certinfo_linux-amd64 /usr/local/bin/cfssl-certinfo

生成Etcd证书

• 自签证书颁发机构（CA）

mkdir -p ~/TLS/{etcd,k8s}
cd TLS/etcd

cat > ca-config.json << EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "www": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF

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

生成证书

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

• 使用自签CA签发Etcd HTTPS证书

cat > server-csr.json << EOF
{
    "CN": "etcd",
    "hosts": [
    "192.168.1.171",
    "192.168.1.172",
    "192.168.1.173"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}
EOF

生成证书

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

Github下载二进制文件

wget https://github.com/etcd-io/etcd/releases/download/v3.4.9/etcd-v3.4.9-linux-amd64.tar.gz

部署Etcd集群(先在一台节点上操作)

mkdir /opt/etcd/{bin,cfg,ssl} -p
tar zxvf etcd-v3.4.9-linux-amd64.tar.gz
mv etcd-v3.4.9-linux-amd64/{etcd,etcdctl} /opt/etcd/bin/

创建配置

cat > /opt/etcd/cfg/etcd.conf << EOF
#[Member]
ETCD_NAME="etcd-1"
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://192.168.1.171:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.1.171:2379"

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.1.171:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.1.171:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.1.171:2380,etcd-2=https://192.168.1.172:2380,etcd-3=https://192.168.1.173:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF

systemd管理etcd

cat > /usr/lib/systemd/system/etcd.service << EOF
[Unit]
Description=Etcd Server
After=network.target
After=network-online.target
Wants=network-online.target

[Service]
Type=notify
EnvironmentFile=/opt/etcd/cfg/etcd.conf
ExecStart=/opt/etcd/bin/etcd \
--cert-file=/opt/etcd/ssl/server.pem \
--key-file=/opt/etcd/ssl/server-key.pem \
--peer-cert-file=/opt/etcd/ssl/server.pem \
--peer-key-file=/opt/etcd/ssl/server-key.pem \
--trusted-ca-file=/opt/etcd/ssl/ca.pem \
--peer-trusted-ca-file=/opt/etcd/ssl/ca.pem \
--logger=zap
Restart=on-failure
LimitNOFILE=65536

[Install]
WantedBy=multi-user.target
EOF

拷贝刚才生成的证书

cp ~/TLS/etcd/ca*pem ~/TLS/etcd/server*pem /opt/etcd/ssl/

把/opt/etcd目录拷贝到其他两个节点，节点2和节点3分别修改etcd.conf配置文件中的节点名称和当前服务器IP，最后启动etcd并设置开机启动。

scp -r /opt/etcd/ root@192.168.1.172:/opt/
scp /usr/lib/systemd/system/etcd.service root@192.168.1.172:/usr/lib/systemd/system/
scp -r /opt/etcd/ root@192.168.1.173:/opt/
scp /usr/lib/systemd/system/etcd.service root@192.168.1.173:/usr/lib/systemd/system/

vim /opt/etcd/cfg/etcd.conf
#[Member]
ETCD_NAME=""   # 修改此处，节点2改为etcd-2，节点3改为etcd-3
ETCD_DATA_DIR="/var/lib/etcd/default.etcd"
ETCD_LISTEN_PEER_URLS="https://当前服务器IP:2380"   # 修改此处为当前服务器IP
ETCD_LISTEN_CLIENT_URLS="https://当前服务器IP:2379" # 修改此处为当前服务器IP

#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://当前服务器IP:2380" # 修改此处为当前服务器IP
ETCD_ADVERTISE_CLIENT_URLS="https://当前服务器IP:2379" # 修改此处为当前服务器IP
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.1.171:2380,etcd-2=https://192.168.1.172:2380,etcd-3=https://192.168.1.173:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

查看集群状态

ETCDCTL_API=3 /opt/etcd/bin/etcdctl --cacert=/opt/etcd/ssl/ca.pem --cert=/opt/etcd/ssl/server.pem --key=/opt/etcd/ssl/server-key.pem --endpoints="https://192.168.1.171:2379,https://192.168.1.172:2379,https://192.168.1.173:2379" endpoint health

https://192.168.1.171:2379 is healthy: successfully committed proposal: took = 8.154404ms
https://192.168.1.173:2379 is healthy: successfully committed proposal: took = 9.044117ms
https://192.168.1.172:2379 is healthy: successfully committed proposal: took = 10.000825ms