【Linux】Let’s EncryptでSSL化対応する

CentOS7.6にWordpressをインストールしてる。
Let’s encryptっていう、https化キットみたいなのがあって、とても簡単だから忘れないように張っておこう。

パッケージインストール

yum -y install epel-release
yum -y install certbot python-certbot-apache
certbot certonly --webroot -w /var/www/wordpress/ -d infracollege.vamdemicsystem.black

対話型で設定

# certbot --apache
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator apache, Installer apache
Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org
No names were found in your configuration files. Please enter in your domain
name(s) (comma and/or space separated)  (Enter 'c' to cancel): infracollege.vamdemicsystem.black ← ドメイン名を入力
Cert not yet due for renewal

You have an existing certificate that has exactly the same domains or certificate name you requested and isn't close to expiry.
(ref: /etc/letsencrypt/renewal/infracollege.vamdemicsystem.black.conf)

What would you like to do?
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1: Attempt to reinstall this existing certificate
2: Renew & replace the cert (limit ~5 per 7 days)
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Select the appropriate number [1-2] then [enter] (press 'c' to cancel): 1 ← インストールするので1
Keeping the existing certificate

We were unable to find a vhost with a ServerName or Address of infracollege.vamdemicsystem.black.
Which virtual host would you like to choose?
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1: ssl.conf                       |                       | HTTPS | Enabled
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Press 1 [enter] to confirm the selection (press 'c' to cancel): 1
Deploying Certificate to VirtualHost /etc/httpd/conf.d/ssl.conf

Please choose whether or not to redirect HTTP traffic to HTTPS, removing HTTP access.
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1: No redirect - Make no further changes to the webserver configuration.
2: Redirect - Make all requests redirect to secure HTTPS access. Choose this for
new sites, or if you're confident your site works on HTTPS. You can undo this
change by editing your web server's configuration.
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Select the appropriate number [1-2] then [enter] (press 'c' to cancel): 2 ← httpできたときにhttpsへURLをリダイレクトしたいので2
Created redirect file: le-redirect-infracollege.vamdemicsystem.black.conf
Rollback checkpoint is empty (no changes made?)

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Congratulations! You have successfully enabled
https://infracollege.vamdemicsystem.black

You should test your configuration at:
https://www.ssllabs.com/ssltest/analyze.html?d=infracollege.vamdemicsystem.black
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IMPORTANT NOTES:
 - Congratulations! Your certificate and chain have been saved at:
   /etc/letsencrypt/live/infracollege.vamdemicsystem.black/fullchain.pem
   Your key file has been saved at:
   /etc/letsencrypt/live/infracollege.vamdemicsystem.black/privkey.pem
   Your cert will expire on 2019-06-23. To obtain a new or tweaked
   version of this certificate in the future, simply run certbot again
   with the "certonly" option. To non-interactively renew *all* of
   your certificates, run "certbot renew"
 - 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

ssl.confやらに自動的に設定してくれている。すごい

# cat /etc/httpd/conf.d/ssl.conf
ServerName infracollege.vamdemicsystem.black
Include /etc/letsencrypt/options-ssl-apache.conf
SSLCertificateFile /etc/letsencrypt/live/infracollege.vamdemicsystem.black/cert.pem
SSLCertificateKeyFile /etc/letsencrypt/live/infracollege.vamdemicsystem.black/privkey.pem
SSLCertificateChainFile /etc/letsencrypt/live/infracollege.vamdemicsystem.black/chain.pem

いいと思う！