Let's Encrypt - certbot-auto (DEPRECATED) - Wildcard Certificate - Nginx Amazon Linux 2

Doing domain validation in this way is the only way to obtain wildcard certificates from Let’s Encrypt

install certbot-auto

curl -O https://dl.eff.org/certbot-auto

modify certbot-auto

# find the following line
elif [ -f /etc/redhat-release ]; then
# replace that line with the following line
elif [ -f /etc/redhat-release ] || grep 'cpe:.*:amazon_linux:2' /etc/os-release > /dev/null 2>&1; then

move certbot-auto

mv certbot-auto /usr/local/bin/certbot-auto

switch to root user (NOTE - keeps the $PATH)

sudo su -

generate certificate for “*.marcuschiu.com” and “marcuschiu.com”

certbot-auto certonly --manual --preferred-challenges=dns --email marcuschiu9@gmail.com --server https://acme-v02.api.letsencrypt.org/directory --agree-tos -d "*.marcuschiu.com" -d "marcuschiu.com" --debug

example output

... installing dependencies
 
Saving debug log to /var/log/letsencrypt/letsencrypt.log
Plugins selected: Authenticator manual, Installer None
 
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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.
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(Y)es/(N)o: Y
Obtaining a new certificate
Performing the following challenges:
dns-01 challenge for marcuschiu.com
dns-01 challenge for marcuschiu.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?
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
(Y)es/(N)o: Y
 
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Please deploy a DNS TXT record under the name
_acme-challenge.marcuschiu.com with the following value:
 
sRPiL8X_c22jj8k6PsodZsL0W-fT-xUKDolvDHNXKfc
 
Before continuing, verify the record is deployed.
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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:
   /etc/letsencrypt/live/marcuschiu.com/fullchain.pem
   Your key file has been saved at:
   /etc/letsencrypt/live/marcuschiu.com/privkey.pem
   Your cert will expire on 2020-09-26. To obtain a new or tweaked
   version of this certificate in the future, simply run certbot-auto
   again. To non-interactively renew *all* of your certificates, run
   "certbot-auto 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

once this process is finished we get 2 files:

• /etc/letsencrypt/live/marcuschiu.com/fullchain.pem
• /etc/letsencrypt/live/marcuschiu.com/privkey.pem

use this in Nginx like so below

ssl_certificate     /etc/letsencrypt/live/marcuschiu.com/fullchain.pem;
ssl_certificate_key /etc/letsencrypt/live/marcuschiu.com/privkey.pem;

server {
	listen 443 ssl;
	server_name marcuschiu.com www.marcuschiu.com;
	...
}

server {
	listen 443 ssl;
	server_name confluence.marcuschiu.com;
    ...
}

# more https servers

# redirect http to https
server {
	listen 80 default_server;
	server_name _;
    return 301 https://$host$request_uri;
}