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继续上一篇文章《负载均衡器高可用部署》下面介绍一下etcd证书生成配置。其中涉及到的ip地址和证书基本信息请替换成你自己的信息。

安装cfssl工具

下载cfssl安装包

https://github.com/cloudflare/cfssl/releases/download/v1.6.4/cfssl_1.6.4_linux_amd64

chmod +x cfssl_1.6.4_linux_amd64
mv cfssl_1.6.4_linux_amd64 /usr/local/bin/cfssl

下载cfssljson安装包

https://github.com/cloudflare/cfssl/releases/download/v1.6.4/cfssljson_1.6.4_linux_amd64

chmod +x cfssljson_1.6.4_linux_amd64
mv cfssljson_1.6.4_linux_amd64 /usr/local/bin/cfssljson

下载cfssl-certinfo安装包

https://github.com/cloudflare/cfssl/releases/download/v1.6.4/cfssl-certinfo_1.6.4_linux_amd64

chmod +x cfssl-certinfo_1.6.4_linux_amd64
mv cfssl-certinfo_1.6.4_linux_amd64 /usr/local/bin/cfssl-certinfo

验证cfssl是否安装

cfssl version

配置CA证书请求文件

cat > ca-csr.json <<"EOF"
{"CN":"kubernetes","key":{"algo":"rsa","size":2048},"names":[{"C":"CN","ST":"zhejiang","L":"hangzhou","O":"eyinfo","OU":"CN"}],"ca":{"expiry":"876000h"}
}
EOF

创建CA证书

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

#输出内容：
2024/07/17 14:05:27 [INFO] generating a new CA key and certificate from CSR
2024/07/17 14:05:27 [INFO] generate received request
2024/07/17 14:05:27 [INFO] received CSR
2024/07/17 14:05:27 [INFO] generating key: rsa-2048
2024/07/17 14:05:28 [INFO] encoded CSR
2024/07/17 14:05:28 [INFO] signed certificate with serial number 204637901880970253758340254603897378959705254552

创建CA证书策略

server auth 表示client可以对使用该ca由server提供的证书进行验证
client auth 表示server可以使用该ca由client提供的证书进行验证

cat > ca-config.json <<"EOF"
{"signing": {"default": {"expiry":"876000h"},"profiles": {"kubernetes": {"usages": ["signing","key encipherment","server auth","client auth"],"expiry": "876000h"}}}
}
EOF

配置etcd证书请求文件

cat > etcd-csr.json <<"EOF"
{"CN": "etcd","hosts": ["127.0.0.1","192.168.3.41","192.168.3.42","192.168.3.43"],"key": {"algo": "rsa","size": 2048},"names": [{"C":"CN","ST":"zhejiang","L":"hangzhou","O":"eyinfo","OU":"CN"}]
}
EOF

生成etcd证书

cfssl gencert -ca=ca.pem -ca-key=ca-key.pem -config=ca-config.json -profile=kubernetes etcd-csr.json | cfssljson -bare etcd

#输出结果
2024/07/17 14:54:50 [INFO] generate received request
2024/07/17 14:54:50 [INFO] received CSR
2024/07/17 14:54:50 [INFO] generating key: rsa-2048
2024/07/17 14:54:50 [INFO] encoded CSR
2024/07/17 14:54:50 [INFO] signed certificate with serial number 190216768305198849016248800228208888865087276362