ssl自动生成

环境
CentOS 7
###首先给系统添加 epel 源
curl -o /etc/yum.repos.d/epel-7.repo https://mirrors.aliyun.com/repo/epel-7.repo
###安装证书申请工具 Certbot
yum install -y certbot
###证书申请
certbot certonly  -d *.wzlinux.com --manual \
--preferred-challenges dns \
--server https://acme-v02.api.letsencrypt.org/directory
####说明
–manual交互式获取，
–preferred-challenges dns使用DNS验证的方式（泛域名只能使用DNS验证），如果取消此选项，将会默认使用 http 形式认证(.well-known)，
–server指明支持acme-v02的Server地址，默认是acme-v01的地址

####申请过程如下，为了确保域名是在你的管理权限之内，我们中间需要做一条 TXT 的 DNS 解析
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator manual, Installer None
Enter email address (used for urgent renewal and security notices) (Enter 'c' to
cancel): [email protected]
Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org

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Please read the Terms of Service at
https://letsencrypt.org/documents/LE-SA-v1.2-November-15-2017.pdf. You must
agree in order to register with the ACME server at
https://acme-v02.api.letsencrypt.org/directory
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(A)gree/(C)ancel: A

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Would you be willing to share your email address with the Electronic Frontier
Foundation, a founding partner of the Let's Encrypt project and the non-profit
organization that develops Certbot? We'd like to send you email about our work
encrypting the web, EFF news, campaigns, and ways to support digital freedom.
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(Y)es/(N)o: N
Obtaining a new certificate
Performing the following challenges:
dns-01 challenge for wzlinux.com

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NOTE: The IP of this machine will be publicly logged as having requested this
certificate. If you're running certbot in manual mode on a machine that is not
your server, please ensure you're okay with that.

Are you OK with your IP being logged?
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(Y)es/(N)o: Y

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Please deploy a DNS TXT record under the name
_acme-challenge.wzlinux.com with the following value:

Fd-T8Q_R_9k4UqerXohPkTWu-aZOaU0mxxozERPRU5M

Before continuing, verify the record is deployed.
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Press Enter to Continue
Waiting for verification...
Cleaning up challenges
Resetting dropped connection: acme-v02.api.letsencrypt.org

IMPORTANT NOTES:
- Congratulations! Your certificate and chain have been saved at:
  /etc/letsencrypt/live/wzlinux.com/fullchain.pem
  Your key file has been saved at:
  /etc/letsencrypt/live/wzlinux.com/privkey.pem
  Your cert will expire on 2019-09-04. To obtain a new or tweaked
  version of this certificate in the future, simply run certbot
  again. To non-interactively renew *all* of your certificates, run
  "certbot renew"
- Your account credentials have been saved in your Certbot
  configuration directory at /etc/letsencrypt. You should make a
  secure backup of this folder now. This configuration directory will
  also contain certificates and private keys obtained by Certbot so
  making regular backups of this folder is ideal.
- If you like Certbot, please consider supporting our work by:

  Donating to ISRG / Let's Encrypt:   https://letsencrypt.org/donate
  Donating to EFF:                    https://eff.org/donate-le

###解析好之后，我们在服务器上面验证一下解析记录。
[root@ip-172-26-5-120 ~]# dig -t txt _acme-challenge.wzlinux.com

; <<>> DiG 9.9.4-RedHat-9.9.4-73.el7_6 <<>> -t txt _acme-challenge.wzlinux.com
;; global options: +cmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 47252
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 1

;; OPT PSEUDOSECTION:
; EDNS: version: 0, flags:; udp: 4096
;; QUESTION SECTION:
;_acme-challenge.wzlinux.com.INTXT

;; ANSWER SECTION:
_acme-challenge.wzlinux.com. 58INTXT"Fd-T8Q_R_9k4UqerXohPkTWu-aZOaU0mxxozERPRU5M"

;; Query time: 0 msec
;; SERVER: 172.26.0.2#53(172.26.0.2)
;; WHEN: Thu Jun 06 07:04:07 UTC 2019
;; MSG SIZE  rcvd: 112

###证书查看
[root@ip-172-26-5-120 ~]# ll /etc/letsencrypt/live/wzlinux.com/
total 4
lrwxrwxrwx. 1 root root  35 Jun  6 06:53 cert.pem -> ../../archive/wzlinux.com/cert1.pem
lrwxrwxrwx. 1 root root  36 Jun  6 06:53 chain.pem -> ../../archive/wzlinux.com/chain1.pem
lrwxrwxrwx. 1 root root  40 Jun  6 06:53 fullchain.pem -> ../../archive/wzlinux.com/fullchain1.pem
lrwxrwxrwx. 1 root root  38 Jun  6 06:53 privkey.pem -> ../../archive/wzlinux.com/privkey1.pem
-rw-r--r--. 1 root root 692 Jun  6 06:53 README
-----------------------------------
©著作权归作者所有：来自51CTO博客作者wzlinux的原创作品，请联系作者获取转载授权，否则将追究法律责任
申请 Let's Encrypt 通配符 HTTPS 证书
https://blog.51cto.com/wzlinux/2405940

###证书使用
```nginx
server
{
listen 443 ssl http2;
#listen [::]:443 ssl http2;
server_name  bbs.wzlinux.com bbs1.wzlinux.com;
index index.html index.htm index.php default.html default.htm default.php;
root  /usr/share/nginx/html/;
ssl on;
ssl_certificate /etc/letsencrypt/live/wzlinux.com/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/wzlinux.com/privkey.pem;
ssl_session_timeout 5m;
ssl_protocols TLSv1 TLSv1.1 TLSv1.2;
ssl_prefer_server_ciphers on;
ssl_ciphers "EECDH+CHACHA20:EECDH+CHACHA20-draft:EECDH+AES128:RSA+AES128:EECDH+AES
256:RSA+AES256:EECDH+3DES:RSA+3DES:!MD5";
ssl_session_cache builtin:1000 shared:SSL:10m;
# openssl dhparam -out /usr/local/nginx/ssl/dhparam.pem 2048
#ssl_dhparam /usr/local/nginx/ssl/dhparam.pem;

        #error_page   404   /404.html;

        # Deny access to PHP files in specific directory
        #location ~ /(wp-content|uploads|wp-includes|images)/.*\.php$ { deny all; }


        location ~ .*\.(gif|jpg|jpeg|png|bmp|swf)$
        {
            expires      30d;
        }

        location ~ .*\.(js|css)?$
        {
            expires      12h;
        }

        location ~ /.well-known {
            allow all;
        }

        location ~ /\.
        {
            deny all;
        }

        access_log  off;
}

server
{
listen          80;
server_name bbs.wzlinux.com;
return 301 https://$server_name$request_uri;
}
```
###证书更新
[root@ip-172-26-5-120 ~]# certbot renew
Saving debug log to /var/log/letsencrypt/letsencrypt.log

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Processing /etc/letsencrypt/renewal/wzlinux.com.conf
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Cert not yet due for renewal

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The following certs are not due for renewal yet:
/etc/letsencrypt/live/wzlinux.com/fullchain.pem expires on 2019-09-04 (skipped)
No renewals were attempted.

###定时更新
30 1 10 * * /usr/bin/certbot renew && systemctl reload nginx

###证书申请(docker)
docker run -it --rm --name certbot \
-v "/etc/letsencrypt:/etc/letsencrypt" \
-v "/var/lib/letsencrypt:/var/lib/letsencrypt" \
certbot/certbot certonly --manual -d  '*.wzlinux.com'

###申请多域名
certbot certonly  -d bbs1.wzlinux.com,bbs2.wzlinux.com,bbs.coffeedst.top \
--manual --preferred-challenges dns \
--server https://acme-v02.api.letsencrypt.org/directory


参考：https://blog.51cto.com/wzlinux/2405940