Haproxy on CentOS/RHEL 7
Install
Certbot is packaged in EPEL (Extra Packages for Enterprise Linux). To use Certbot, you must first enable the EPEL repository. On RHEL or Oracle Linux, you must also enable the optional channel.
After doing this, you can install Certbot by running:
$ sudo yum install certbot
Certbot's DNS plugins are also available for your system which can be used to automate obtaining a wildcard certificate from Let's Encrypt's ACMEv2 server. To use one of these plugins, you must have configured DNS for the domain you want to obtain a certificate for with a DNS provider that Certbot has a plugin for. A list of these plugins and more information about using them can be found here. To install one of these plugins, run the installation command above but replace certbot with the name of the DNS plugin you want to install.
Get Started
Certbot supports a number of different “plugins” that can be used to obtain and/or install certificates.
Since your server architecture doesn't yet officially support automatic installation you should probably use the certonly command to obtain your certificate.
$ sudo certbot certonly
This will allow you interactively select the plugin and options used to obtain your certificate. If you already have a webserver running, we recommend choosing the "webroot" plugin.
Alternatively, you can specify more information on the command line.
To obtain a cert using the "webroot" plugin, which can work with the webroot directory of any webserver software:
$ sudo certbot certonly --webroot -w /var/www/example -d example.com -d www.example.com -w /var/www/thing -d thing.is -d m.thing.is
This command will obtain a single cert for example.com, www.example.com, thing.is, and m.thing.is; it will place files below /var/www/example to prove control of the first two domains, and under /var/www/thing for the second pair.
To obtain a cert using a built-in “standalone” webserver (you may need to temporarily stop your existing webserver, if any) for example.com and www.example.com:
$ sudo certbot certonly --standalone -d example.com -d www.example.com
You can also use one of Certbot's DNS plugins to obtain a certificate if it's installed and you have configured DNS for the domain you want to obtain a certificate for with the DNS provider matching the plugin. To see more information about using these plugins, click here. If you want to use one of these plugins with Let's Encrypt's new ACMEv2 server that will issue wildcard certificates, you'll also need to include the following flag on the command line:
--server https://acme-v02.api.letsencrypt.org/directory
Automating renewal
Certbot can be configured to renew your certificates automatically before they expire. Since Let's Encrypt certificates last for 90 days, it's highly advisable to take advantage of this feature. You can test automatic renewal for your certificates by running this command:
$ sudo certbot renew --dry-runIf that appears to be working correctly, you can arrange for automatic renewal by adding a cron job or systemd timer which runs the following:
certbot renew
An example cron job might look like this, which will run at noon and midnight every day:
0 0,12 * * * python -c 'import random; import time; time.sleep(random.random() * 3600)' && certbot renew
More detailed information and options about renewal can be found in the full documentation.
Installing a cert in HAProxy
Certificate installation with HAProxy is complicated; you probably want to follow one of these guides.
or
Or you might be interested in using the experimental third-party HAProxy plugin from Greenhost.
Install
Certbot is packaged in EPEL (Extra Packages for Enterprise Linux). To use Certbot, you must first enable the EPEL repository. On RHEL or Oracle Linux, you must also enable the optional channel.
After doing this, you can install Certbot by running:
$ sudo yum install certbot
Certbot's DNS plugins are also available for your system which can be used to automate obtaining a wildcard certificate from Let's Encrypt's ACMEv2 server. To use one of these plugins, you must have configured DNS for the domain you want to obtain a certificate for with a DNS provider that Certbot has a plugin for. A list of these plugins and more information about using them can be found here. To install one of these plugins, run the installation command above but replace certbot with the name of the DNS plugin you want to install.
Get Started
Certbot supports a number of different “plugins” that can be used to obtain and/or install certificates.
Since your server architecture doesn't yet officially support automatic installation you should probably use the certonly command to obtain your certificate.
$ sudo certbot certonly
This will allow you interactively select the plugin and options used to obtain your certificate. If you already have a webserver running, we recommend choosing the "webroot" plugin.
Alternatively, you can specify more information on the command line.
To obtain a cert using the "webroot" plugin, which can work with the webroot directory of any webserver software:
$ sudo certbot certonly --webroot -w /var/www/example -d example.com -d www.example.com -w /var/www/thing -d thing.is -d m.thing.is
This command will obtain a single cert for example.com, www.example.com, thing.is, and m.thing.is; it will place files below /var/www/example to prove control of the first two domains, and under /var/www/thing for the second pair.
To obtain a cert using a built-in “standalone” webserver (you may need to temporarily stop your existing webserver, if any) for example.com and www.example.com:
$ sudo certbot certonly --standalone -d example.com -d www.example.com
You can also use one of Certbot's DNS plugins to obtain a certificate if it's installed and you have configured DNS for the domain you want to obtain a certificate for with the DNS provider matching the plugin. To see more information about using these plugins, click here. If you want to use one of these plugins with Let's Encrypt's new ACMEv2 server that will issue wildcard certificates, you'll also need to include the following flag on the command line:
--server https://acme-v02.api.letsencrypt.org/directory
Automating renewal
Certbot can be configured to renew your certificates automatically before they expire. Since Let's Encrypt certificates last for 90 days, it's highly advisable to take advantage of this feature. You can test automatic renewal for your certificates by running this command:
$ sudo certbot renew --dry-runIf that appears to be working correctly, you can arrange for automatic renewal by adding a cron job or systemd timer which runs the following:
certbot renew
An example cron job might look like this, which will run at noon and midnight every day:
0 0,12 * * * python -c 'import random; import time; time.sleep(random.random() * 3600)' && certbot renew
More detailed information and options about renewal can be found in the full documentation.
Installing a cert in HAProxy
Certificate installation with HAProxy is complicated; you probably want to follow one of these guides.
or
Or you might be interested in using the experimental third-party HAProxy plugin from Greenhost.
