1. Letsencrypt/certbot/manual_mode/dns-01

/wildcard /ubuntu /w3.qmail.jp

/auth-hook

manual modeで証明書を取得する場合、

• DNSレコードを設定するのが容易であれば、(普通はそうだろう)

DNSを使った方がいい。(APIが用意されているならなおのこと

• webサーバーを止める必要がない。

2. moin.qmail.jp

tss host (pound)

#certbot certonly --manual --preferred-challenges dns-01 -d moin.qmail.jp

証明書のインストール時にwebサーバーを一時的に停止するのは必要だが。

-- ToshinoriMaeno 2019-01-22 14:26:57

3. sakura.qmail.jp

• moin2.qmail.jp も同様だが。

# certbot certonly --manual --preferred-challenges dns-01 -d sakura.qmail.jp
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator manual, Installer None
Starting new HTTPS connection (1): acme-v02.api.letsencrypt.org
Obtaining a new certificate
Performing the following challenges:
dns-01 challenge for sakura.qmail.jp

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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.sakura.qmail.jp with the following value:

B2_BLBgOtMPgELtaEj7c3sQm-bculY28hkw7adgO9i8

Before continuing, verify the record is deployed.

<<< ここでTXTレコード設定を行う。APIが用意されていれば、便利 >>

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Press Enter to Continue
Waiting for verification...
Cleaning up challenges

IMPORTANT NOTES:
 - Congratulations! Your certificate and chain have been saved at:
   /usr/local/etc/letsencrypt/live/sakura.qmail.jp/fullchain.pem
   Your key file has been saved at:
   /usr/local/etc/letsencrypt/live/sakura.qmail.jp/privkey.pem
   Your cert will expire on 2020-03-28. 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"
 - 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

4. 更新処理

更新処理とその自動化を考慮するなら、webサーバー業者を経由する証明書を使うのがいいかも。

• その場合はhttpを使えばいい。サーバー業者はDNSサービスまで抱えこむ必要はない。

-- ToshinoriMaeno 2019-01-22 14:31:42

DNSを使っていても、更新の自動化が特に難しいということはないだろう。(API)