Use Let’s Encrypt for ssl certificate

From this web site follow the instructions to update your server web environment:

$ yum -y install yum-utils
$ yum-config-manager --enable rhui-REGION-rhel-server-extras rhui-REGION-rhel-server-optional
yum install certbot python2-certbot-apache

then run this for the website sample.lu

 certbot certonly --apache -d pennellificioeurope.it -d www.pennellificioeurope.it

or

certbot run -a webroot -i apache -w /path_to_web -d solci.eu -d www.solci.eu

this the result

Saving debug log to /var/log/letsencrypt/letsencrypt.log

Plugins selected: Authenticator webroot, Installer apache

Enter email address (used for urgent renewal and security notices) (Enter ‘c’ to

cancel): postmaster@saic.it

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: Y

Starting new HTTPS connection (1): supporters.eff.org

Obtaining a new certificate

Performing the following challenges:

http-01 challenge for sample.lu

http-01 challenge for www.sample.lu

Using the webroot path /var/www/sample.lu/web for all unmatched domains.

Waiting for verification…

Cleaning up challenges

Resetting dropped connection: acme-v02.api.letsencrypt.org

Deploying Certificate to VirtualHost /etc/httpd/conf/sites-enabled/100-sample.lu.vhost

Deploying Certificate to VirtualHost /etc/httpd/conf/sites-enabled/100-sample.lu.vhost

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

Redirecting vhost in /etc/httpd/conf/sites-enabled/100-sample.lu.vhost to ssl vhost in /etc/httpd/conf/sites-enabled/100-sample.lu.vhost

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Congratulations! You have successfully enabled https://sample.lu and

https://www.sample.lu

You should test your configuration at:

https://www.ssllabs.com/ssltest/analyze.html?d=sample.lu

https://www.ssllabs.com/ssltest/analyze.html?d=www.sample.lu

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IMPORTANT NOTES:

– Congratulations! Your certificate and chain have been saved at:

   /etc/letsencrypt/live/sample.lu/fullchain.pem

   Your key file has been saved at:

   /etc/letsencrypt/live/sample.lu/privkey.pem

   Your cert will expire on 2019-06-11. 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 

sudo certbot renew –dry-run

for test

sudo certbot renew

for prod

or

/opt/certbot/certbot-auto renew -i apache -a webroot

single domain CORRECT to USE

certbot --apache certonly -n -d domain.com

remember to deactivate cloudfare dns proxy CDN and to deactivate any apache tomcat redirection before to run the 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

To renew seafile.saic.it do : 

mv /etc/httpd/conf.d/seafile.conf /etc/httpd/conf.d/seafile.conf.tmp

service httpd restart

/opt/certbot/certbot-auto renew -i apache -a webroot

service httpd restart

mv /etc/httpd/conf.d/seafile.conf.tmp /etc/httpd/conf.d/seafile.conf

To update an existing domain with adding a new subdomain

--expand tells Certbot to update an existing certificate with a new certificate that contains all of the old domains and one or more additional new domains. With the --expand option, use the -d option to specify all existing domains and one or more new domains.

Example:

certbot --expand -d existing.com,example.com,newdomain.com

If you prefer, you can specify the domains individually like this:

certbot --expand -d existing.com -d example.com -d newdomain.com

 

from here 

certbot docs

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