当前位置博文首页 > 七月流星雨：二进制方法-部署k8s集群部署1.18版本

最大化缩小

七月流星雨：二进制方法-部署k8s集群部署1.18版本

作者：七月流星雨时间：2021-02-07 10:26

二进制方法-部署k8s集群部署1.18版本

1. 前置知识点

1.1 生产环境可部署kubernetes集群的两种方式

目前生产部署Kubernetes集群主要有两种方式
- kuberadm
  
  Kubeadm是一个K8s部署工具，提供kubeadm init和kubeadm join，用于快速部署Kubernetes集群。
- 二进制包
  
  从github下载发行版的二进制包，手动部署每个组件，组成Kubernetes集群。
  
  Kubeadm降低部署门槛，但屏蔽了很多细节，遇到问题很难排查。如果想更容易可控，推荐使用二进制包部署Kubernetes集群，虽然手动部署麻烦点，期间可以学习很多工作原理，也利于后期维护。

1.2 安装要求

在开始之前，部署Kubernetes集群机器需要满足以下几个条件：
- 一台或多台机器，操作系统 CentOS7.x-86_x64
- 硬件配置：2GB或更多RAM，2个CPU或更多CPU，硬盘30GB或更多
- 集群中所有机器之间网络互通
- 可以访问外网，需要拉取镜像，如果服务器不能上网，需要提前下载镜像并导入节点
- 禁止swap分区

1.3 环境准备

1.3.1 软件环境

软件	版本
操作系统	CentOS7.8_x64 （mini）
Docker	19-ce
Kubernetes	1.18

1.3.2 单master架构图

1.3.3 服务器整体规划

角色	IP	组件
k8s-master	192.168.0.201	kube-apiserver，kube-controller-manager，kube-scheduler，etcd
k8s-node1	192.168.0.202	kubelet，kube-proxy，docker etcd
k8s-node2	192.168.0.203	kubelet，kube-proxy，docker，etcd

1.4 操作系统初始化配置

# 关闭防火墙
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>

# 在master添加hosts
cat >> /etc/hosts << EOF
192.168.0.201 k8s-master
192.168.0.202 k8s-node1
192.168.0.203 k8s-node2
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
sysctl --system  # 生效

# 时间同步
yum install ntpdate -y
ntpdate time.windows.com

2. 部署Etcd集群

Etcd 是一个分布式键值存储系统，Kubernetes使用Etcd进行数据存储，所以先准备一个Etcd数据库，为解决Etcd单点故障，应采用集群方式部署，这里使用3台组建集群，可容忍1台机器故障，当然，你也可以使用5台组建集群，可容忍2台机器故障。

节点名称	IP
etcd-1	192.168.0.201
etcd-2	192.168.0.202
etcd-3	192.168.0.203

注：为了节省机器，这里与K8s节点机器复用。也可以独立于k8s集群之外部署，只要apiserver能连接到就行。

2.1 准备cfssl 证书生成工具

cfssl是一个开源的证书管理工具，使用json文件生成证书，相比openssl更方便使用。

找任意一台服务器操作，这里用Master节点

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/bin/cfssl-certinfo

2.1.1 在master执行工具安装

[root@k8s-master ~]# mkdir -p ~/cfssl/
[root@k8s-master ~]# cd cfssl/
[root@k8s-master cfssl]# pwd
/root/cfssl
[root@k8s-master cfssl]# wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
[root@k8s-master cfssl]# wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
[root@k8s-master cfssl]# wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
[root@k8s-master cfssl]# chmod +x cfssl_linux-amd64 cfssljson_linux-amd64 cfssl-certinfo_linux-amd64
[root@k8s-master cfssl]# mv cfssl_linux-amd64 /usr/local/bin/cfssl
[root@k8s-master cfssl]# mv cfssljson_linux-amd64 /usr/local/bin/cfssljson
[root@k8s-master cfssl]# mv cfssl-certinfo_linux-amd64 /usr/bin/cfssl-certinfo

2.2 生成Etcd证书

2.2.1 创建工作目录

[root@k8s-master ~]# mkdir -p ~/TLS/{etcd,k8s}

[root@k8s-master ~]# cd /root/TLS/etcd/

2.2.2 自签CA：

执行json格式配置

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

2.2.2.1 执行生成证书

[root@k8s-master etcd]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
2020/11/17 20:53:48 [INFO] generating a new CA key and certificate from CSR
2020/11/17 20:53:48 [INFO] generate received request
2020/11/17 20:53:48 [INFO] received CSR
2020/11/17 20:53:48 [INFO] generating key: rsa-2048
2020/11/17 20:53:48 [INFO] encoded CSR
2020/11/17 20:53:48 [INFO] signed certificate with serial number 101950529088026535677297860863057856432140076739

2.2.2.2 验证CA证书

[root@k8s-master etcd]# ls *pem
ca-key.pem  ca.pem

2.2.3 使用自签CA签发Etcd HTTTPS证书

创建证书申请文件

cat > server-csr.json << EOF
{
    "CN": "etcd",
    "hosts": [
    "192.168.0.201",
    "192.168.0.202",
    "192.168.0.203"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}
EOF

执行配置文件

[root@k8s-master etcd]# cat > server-csr.json << EOF
> {
>     "CN": "etcd",
>     "hosts": [
>     "192.168.0.201",
>     "192.168.0.202",
>     "192.168.0.203"
>     ],
>     "key": {
>         "algo": "rsa",
>         "size": 2048
>     },
>     "names": [
>         {
>             "C": "CN",
>             "L": "BeiJing",
>             "ST": "BeiJing"
>         }
>     ]
> }
> EOF

注：上述文件hosts字段中IP为所有etcd节点的集群内部通信IP，一个都不能少！为了方便后期扩容可以多写几个预留的IP。

2.2.3.1 生成Etcd 证书

[root@k8s-master etcd]# cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=www server-csr.json | cfssljson -bare server
2020/11/17 21:03:05 [INFO] generate received request
2020/11/17 21:03:05 [INFO] received CSR
2020/11/17 21:03:05 [INFO] generating key: rsa-2048
2020/11/17 21:03:05 [INFO] encoded CSR
2020/11/17 21:03:05 [INFO] signed certificate with serial number 134705649830183343899987337527377566420156796503
2020/11/17 21:03:05 [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").

2.2.3.2 验证etcd证书

[root@k8s-master etcd]# ls server*pem
server-key.pem  server.pem

3. 从Github下载二进制文件

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

[root@k8s-master etcd]# mkdir -p ~/tools
[root@k8s-master etcd]# cd /root/tools/
[root@k8s-master tools]# wget https://github.com/etcd-io/etcd/releases/download/v3.4.9/etcd-v3.4.9-linux-amd64.tar.gz
[root@k8s-master tools]# ll
总用量 16960
-rw-r--r--. 1 root root 17364053 11月 17 21:09 etcd-v3.4.9-linux-amd64.tar.gz

4. 部署Etcd集群

以下在节点1上操作，为简化操作，待会将节点1生成的所有文件拷贝到节点2和节点3.

4.1 创建工作目录并解压二进制包

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/

执行上面命令工作目录

[root@k8s-master etcd]# cd /root/tools/
[root@k8s-master tools]# ll
总用量 16960
-rw-r--r--. 1 root root 17364053 11月 17 21:09 etcd-v3.4.9-linux-amd64.tar.gz
[root@k8s-master tools]# tar zxvf etcd-v3.4.9-linux-amd64.tar.gz
[root@k8s-master tools]# mv etcd-v3.4.9-linux-amd64/etcd /opt/etcd/bin/
[root@k8s-master tools]# mv etcd-v3.4.9-linux-amd64/etcdctl /opt/etcd/bin/

4.2 创建etcd配置文件

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://192.168.0.201:2380"
ETCD_LISTEN_CLIENT_URLS="https://192.168.0.201:2379"
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.201:2380"
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.201:2379"
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.0.201:2380,etcd-2=https://192.168.0.202:2380,etcd-3=https://192.168.0.203:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"
EOF

ETCD_NAME：节点名称，集群中唯一
ETCD_DATA_DIR：数据目录
ETCD_LISTEN_PEER_URLS：集群通信监听地址
ETCD_LISTEN_CLIENT_URLS：客户端访问监听地址
ETCD_INITIAL_ADVERTISE_PEER_URLS：集群通告地址
ETCD_ADVERTISE_CLIENT_URLS：客户端通告地址
ETCD_INITIAL_CLUSTER：集群节点地址
ETCD_INITIAL_CLUSTER_TOKEN：集群Token
ETCD_INITIAL_CLUSTER_STATE：加入集群的当前状态，new是新集群，existing表示加入已有集群

服务器执行配置

[root@k8s-master ~]# 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://192.168.0.201:2380"
> ETCD_LISTEN_CLIENT_URLS="https://192.168.0.201:2379"
> #[Clustering]
> ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.201:2380"
> ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.201:2379"
> ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.0.201:2380,etcd-2=https://192.168.0.202:2380,etcd-3=https://192.168.0.203:2380"
> ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
> ETCD_INITIAL_CLUSTER_STATE="new"
> EOF

4.3 配置systemctl管理etcd服务

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

服务器执行配置

[root@k8s-master ~]# 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

4.4 拷贝生成的证书

拷贝ca证书和etcd证书

[root@k8s-master ~]# cp ~/TLS/etcd/ca*pem  /opt/etcd/ssl/
[root@k8s-master ~]# cp -a ~/TLS/etcd/server*pem /opt/etcd/ssl/
[root@k8s-master ~]# ll /opt/etcd/ssl/
总用量 16
-rw-------. 1 root root 1675 11月 19 14:53 ca-key.pem
-rw-r--r--. 1 root root 1265 11月 19 14:53 ca.pem
-rw-------. 1 root root 1675 11月 17 21:03 server-key.pem
-rw-r--r--. 1 root root 1338 11月 17 21:03 server.pem

4.5 拷贝master节点所有生成的文件拷贝到节点2和节点3

[root@k8s-master ~]# scp -r /opt/etcd/ root@192.168.0.202:/opt
[root@k8s-master ~]# scp -r /usr/lib/systemd/system/etcd.service root@192.168.0.202:/usr/lib/systemd/system/
[root@k8s-master ~]# scp -r /opt/etcd/ root@192.168.0.203:/opt
[root@k8s-master ~]# scp -r /usr/lib/systemd/system/etcd.service root@192.168.0.203:/usr/lib/systemd/system/

4.6 修改节点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

4.6.1 修改k8s-node1节点etcd.conf配置文件

[root@k8s-node1 ~]# vim /opt/etcd/cfg/etcd.conf 
[root@k8s-node1 ~]# cat /opt/etcd/cfg/etcd.conf 
#[Member]
ETCD_NAME="etcd-2"         # 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://192.168.0.202:2380"      # 修改此处为当前服务器IP
ETCD_LISTEN_CLIENT_URLS="https://192.168.0.202:2379"    # 修改此处为当前服务器IP
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.202:2380"    # 修改此处为当前服务器IP
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.202:2379"      # 修改此处为当前服务器IP
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.0.201:2380,etcd-2=https://192.168.0.202:2380,etcd-3=https://192.168.0.203:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

4.6.2 修改k8s-node2节点etcd.conf配置文件

[root@k8s-node2 ~]# vim /opt/etcd/cfg/etcd.conf 
[root@k8s-node2 ~]# cat /opt/etcd/cfg/etcd.conf 
#[Member]
ETCD_NAME="etcd-3"         # 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://192.168.0.203:2380"     # 修改此处为当前服务器IP
ETCD_LISTEN_CLIENT_URLS="https://192.168.0.203:2379"    # 修改此处为当前服务器IP
#[Clustering]
ETCD_INITIAL_ADVERTISE_PEER_URLS="https://192.168.0.203:2380"    # 修改此处为当前服务器IP
ETCD_ADVERTISE_CLIENT_URLS="https://192.168.0.203:2379"      # 修改此处为当前服务器IP
ETCD_INITIAL_CLUSTER="etcd-1=https://192.168.0.201:2380,etcd-2=https://192.168.0.202:2380,etcd-3=https://192.168.0.203:2380"
ETCD_INITIAL_CLUSTER_TOKEN="etcd-cluster"
ETCD_INITIAL_CLUSTER_STATE="new"

4.7 启动并设置开机启动

启动master节点

[root@k8s-master ~]# systemctl daemon-reload
[root@k8s-master ~]# systemctl start etcd
[root@k8s-master ~]# systemctl enable etcd
Created symlink from /etc/systemd/system/multi-user.target.wants/etcd.service to /usr/lib/systemd/system/etcd.service.

启动node1节点

[root@k8s-node1 ~]# systemctl daemon-reload
[root@k8s-node1 ~]# systemctl start etcd
[root@k8s-node1 ~]# systemctl enable etcd
Created symlink from /etc/systemd/system/multi-user.target.wants/etcd.service to /usr/lib/systemd/system/etcd.service.

启动node2节点

[root@k8s-node2 ~]# systemctl daemon-reload
[root@k8s-node2 ~]# systemctl start etcd
[root@k8s-node2 ~]# systemctl enable etcd
Created symlink from /etc/systemd/system/multi-user.target.wants/etcd.service to /usr/lib/systemd/system/etcd.service.

4.8 查看集群状态

[root@k8s-master ~]# 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://192.168.0.201:2379,https://192.168.0.202:2379,https://192.168.0.203:2379" endpoint health
https://192.168.0.201:2379 is healthy: successfully committed proposal: took = 40.294783ms
https://192.168.0.203:2379 is healthy: successfully committed proposal: took = 40.593516ms
https://192.168.0.202:2379 is healthy: successfully committed proposal: took = 21.798951ms

如果输出上面信息，就说明集群部署成功。如果有问题第一步先看日志：/var/log/message 或 journalctl -u etcd

5. 安装Docker

以下在所有节点操作，这里采用yum安装方式，

5.1 安装docker依赖包

yum install -y yum-utils device-mapper-persistent-data   lvm2

5.1.1 在k8s master上执行

[root@k8s-master ~]# yum install -y yum-utils device-mapper-persistent-data   lvm2

5.1.2 在k8s node1上执行

[root@k8s-node1 ~]# yum install -y yum-utils device-mapper-persistent-data   lvm2

5.1.3 在k8s node2上执行

[root@k8s-node2 ~]# yum install -y yum-utils device-mapper-persistent-data   lvm2

5.2 安装docker镜像源

5.2.1 在k8s master执行

[root@k8s-master ~]#  yum-config-manager     --add-repo     https://download.docker.com/linux/centos/docker-ce.repo
已加载插件：fastestmirror
adding repo from: https://download.docker.com/linux/centos/docker-ce.repo
grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo

5.2.2 在k8s node1执行

[root@k8s-node1 ~]#  yum-config-manager     --add-repo     https://download.docker.com/linux/centos/docker-ce.repo
已加载插件：fastestmirror
adding repo from: https://download.docker.com/linux/centos/docker-ce.repo
grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo

5.2.3 在k8s node2执行

[root@k8s-node2 ~]#  yum-config-manager     --add-repo     https://download.docker.com/linux/centos/docker-ce.repo
已加载插件：fastestmirror
adding repo from: https://download.docker.com/linux/centos/docker-ce.repo
grabbing file https://download.docker.com/linux/centos/docker-ce.repo to /etc/yum.repos.d/docker-ce.repo
repo saved to /etc/yum.repos.d/docker-ce.repo

5.3 安装docker

5.3.1 在k8s master上执行docker安装

[root@k8s-master ~]# yum install -y docker-ce

5.3.2 在k8s node1上执行docker安装

[root@k8s-node1 ~]# yum install -y docker-ce

5.3.3 在k8s node2上执行docker安装

[root@k8s-node2 ~]# yum install -y docker-ce

5.6 配置镜像加速

mkdir -p  /etc/docker
cat > /etc/docker/daemon.json << EOF
{
  "registry-mirrors": ["https://b9pmyelo.mirror.aliyuncs.com"]
}
EOF

5.7 启动docker，设置开机启动

 /bin/systemctl daemon-reload
 /bin/systemctl start docker
 /bin/systemctl enable docker

6. 部署master node

6.1 生成kube-apiserver证书

6.1.1 生成ca证书

cat > ca-config.json << EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"
    },
    "profiles": {
      "kubernetes": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF
cat > ca-csr.json << EOF
{
    "CN": "kubernetes",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing",
            "O": "k8s",
            "OU": "System"
        }
    ]
}
EOF

执行apiserver证书配置

[root@k8s-master ~]# mkdir -p /root/TLS/apiserver
[root@k8s-master ~]# cd /root/TLS/apiserver/
[root@k8s-master apiserver]# ll
总用量 0
[root@k8s-master apiserver]# cat > ca-config.json << EOF
> {
>   "signing": {
>     "default": {
>       "expiry": "87600h"
>     },
>     "profiles": {
>       "kubernetes": {
>          "expiry": "87600h",
>          "usages": [
>             "signing",
>             "key encipherment",
>             "server auth",
>             "client auth"
>         ]
>       }
>     }
>   }
> }
> EOF
[root@k8s-master apiserver]# cat > ca-csr.json << EOF
> {
>     "CN": "kubernetes",
>     "key": {
>         "algo": "rsa",
>         "size": 2048
>     },
>     "names": [
>         {
>             "C": "CN",
>             "L": "Beijing",
>             "ST": "Beijing",
>             "O": "k8s",
>             "OU": "System"
>         }
>     ]
> }
> EOF

执行生成ca证书

[root@k8s-master apiserver]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca -
2020/11/19 21:02:47 [INFO] generating a new CA key and certificate from CSR
2020/11/19 21:02:47 [INFO] generate received request
2020/11/19 21:02:47 [INFO] received CSR
2020/11/19 21:02:47 [INFO] generating key: rsa-2048
2020/11/19 21:02:47 [INFO] encoded CSR
2020/11/19 21:02:47 [INFO] signed certificate with serial number 618964693704774402914754546857528123070512384496
[root@k8s-master apiserver]# ll *pem
-rw-------. 1 root root 1675 11月 19 21:02 ca-key.pem
-rw-r--r--. 1 root root 1359 11月 19 21:02 ca.pem

6.2.1 生成kube-apiserver https证书