一、安装 CFSSL
证书下载官方地址：https://pkg.cfssl.org
#下面三个安装包，无需下载，之前百度云中的压缩包中都有
[root@linux-node1 ~]# cd /usr/local/src
[root@linux-node1 src]# wget https://pkg.cfssl.org/R1.2/cfssl_linux-amd64
[root@linux-node1 src]# wget https://pkg.cfssl.org/R1.2/cfssljson_linux-amd64
[root@linux-node1 src]# wget https://pkg.cfssl.org/R1.2/cfssl-certinfo_linux-amd64
[root@linux-node1 src]# chmod +x cfssl*
[root@linux-node1 src]# mv cfssl-certinfo_linux-amd64 /opt/kubernetes/bin/cfssl-certinfo
[root@linux-node1 src]# mv cfssljson_linux-amd64 /opt/kubernetes/bin/cfssljson
[root@linux-node1 src]# mv cfssl_linux-amd64 /opt/kubernetes/bin/cfssl
复制cfssl命令文件到k8s-node1和k8s-node2节点。如果实际中多个节点，就都需要同步复制。
[root@linux-node1 ~]# scp /opt/kubernetes/bin/cfssl* 192.168.56.12: /opt/kubernetes/bin
[root@linux-node1 ~]# scp /opt/kubernetes/bin/cfssl* 192.168.56.13: /opt/kubernetes/bin
二、创建生成证书临时存放目录
[root@linux-node1 ~]# cd /usr/local/src/
[root@linux-node1 src]# mkdir ssl && cd ssl
[root@linux-node1 ssl]# pwd
/usr/local/src/ssl
三、创建用来生成CA文件的JSON配置文件
[root@linux-node1 ssl]# vim ca-config.json
{
"signing": {
"default": {
"expiry": "8760h"
},
"profiles": {
"kubernetes": {
"usages": [
"signing",
"key encipherment",
"server auth",
"client auth"
],
"expiry": "8760h"
}
}
}
}
四、创建用来生成CA证书请求(CSR)的JSON配置文件
[root@linux-node1 ssl]# vim ca-csr.json
{
"CN": "kubernetes",
"key": {
"algo": "rsa",
"size":
},
"names": [
{
"C": "CN",
"ST": "BeiJing",
"L": "BeiJing",
"O": "k8s",
"OU": "System"
}
]
}
五、生成CA证书(ca.pem)和密钥(ca-key.pem)
[root@linux-node1 ssl]# cfssl gencert -initca ca-csr.json | cfssljson -bare ca
// :: [INFO] generating a new CA key and certificate from CSR
// :: [INFO] generate received request
// :: [INFO] received CSR
// :: [INFO] generating key: rsa-
// :: [INFO] encoded CSR
// :: [INFO] signed certificate with serial number
[root@linux-node1 ssl]# ls -l
total
-rw-r--r-- root root May : ca-config.json
-rw-r--r-- root root May : ca.csr
-rw-r--r-- root root May : ca-csr.json
-rw------- root root May : ca-key.pem
六、分发证书
[root@linux-node1 ssl]# cp ca.csr ca.pem ca-key.pem ca-config.json /opt/kubernetes/ssl
SCP证书到k8s-node1和k8s-node2节点
[root@linux-node1 ssl]# scp ca.csr ca.pem ca-key.pem ca-config.json 192.168.56.12:/opt/kubernetes/ssl
[root@linux-node1 ssl]# scp ca.csr ca.pem ca-key.pem ca-config.json 192.168.56.13:/opt/kubernetes/ssl