先去cloudflare上申请IP https://dash.cloudflare.com/profile/api-tokens

在Edit zone DNS的模版下授权可以修改DNS的域名

写入API配置

echo " dns_cloudflare_api_token = XXXXXXXXXXXXXXXXXXXXXx" >/root/cloudflare.ini

安装和签发ssl

dnf install -y epel-release
dnf install -y certbot certbot-dns-cloudflare python*-certbot-dns-cloudflare
certbot certonly --dns-cloudflare --dns-cloudflare-credentials /root/cloudflare.ini -d kvm.la