k8s集群———etcd-ssl自簽名證書

etcd集群master節點安裝
1，自簽名SSL證書
##安裝工具cfssl
$ cat 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

##自簽名證書腳本詳解
root@k8s-master: ~/k8s/etcd-cert 16:56:21
$ cat etcd-cert.sh
#ca辦法證書機構
cat > ca-config.json <<EOF
{
  "signing": {
    "default": {
      "expiry": "87600h"  #證書過期時間h單位
    },
    "profiles": {
      "www": {
         "expiry": "87600h",
         "usages": [
            "signing",
            "key encipherment",
            "server auth",
            "client auth"
        ]
      }
    }
  }
}
EOF
#ca機構請求
cat > ca-csr.json <<EOF
{
    "CN": "etcd CA",
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "Beijing",
            "ST": "Beijing"
        }
    ]
}
EOF
#生成證書：讀取上邊兩個文件生成證書
cfssl gencert -initca ca-csr.json | cfssljson -bare ca -

#-----------------------
#etcd域名證書，需要把etcd節點ip都寫進去，多寫點備份用
cat > server-csr.json <<EOF
{
    "CN": "etcd",
    "hosts": [
    "192.168.1.63",
    "192.168.1.65",
    "192.168.1.66"
    ],
    "key": {
        "algo": "rsa",
        "size": 2048
    },
    "names": [
        {
            "C": "CN",
            "L": "BeiJing",
            "ST": "BeiJing"
        }
    ]
}
EOF

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