Just tried installing on Centos 7, but getting the following message
Any plans for a Centos 7 installer?
[root@host letsencrypt]# sh letsencrypt-auto
Updating letsencrypt and virtual environment dependencies......
Requesting root privileges to run with virtualenv: /root/.local/share/letsencrypt/bin/letsencrypt
No installers are available on your OS yet; try running "letsencrypt-auto certonly" to get a cert you can install manuallyI believe on CentOS you can only install certificates manually.
You have to stop your webserver, run the manual command from the how-to and then change your webserver’s configuration to use the generated certificates.
Edit: I see now I failed to properly read the TS…
I have not been able to get the auto-installer to work on a supported platform (ubuntu) either, by the way. Probably something to do with my webserver’s configuration.
@alphabootis For non-(fully)-automated client support, you don’t have to stop your webserver. There’s also the webroot plugin. This uses the existing webserver (Apache/nginx/whatever) for serving the challenge. You are referring to the standalone plugin, which is much more cumbersome. For more information, see the Let’s Encrypt User Guide about plugins.
@giorgio79 Apparently, your webserver isn’t detected properly for fully automated certificate installation. There can be many reasons. If you run letsencrypt-auto with the -vv switch, it will give you a lot more debugging output, perhaps with a clue what goes wrong.
Excellent tip.
Kicking the webserver around a bit is no problem in my case but this would make automation more straightforward.
Thx Osiris, just ran with -vv
For some reason, it complains of “None” installer.
Here is the output
letsencrypt version: 0.1.1 x
x Arguments: [’-vv’] x
x Discovered plugins: x
x PluginsRegistry(PluginEntryPoint#apache,PluginEntryPoint#webroot,Plu x
x ginEntryPoint#null,PluginEntryPoint#manual,PluginEntryPoint#standalo x
x ne) x
x Requested authenticator None and installer None x
x No installation (PluginEntryPoint#apache): x
x Traceback (most recent call last): x
x File x
x “/root/.local/share/letsencrypt/lib/python2.7/site-packages/letsencr x
x ypt/plugins/disco.py”, line 103, in prepare x
x self._initialized.prepare() x
x File x
x “/root/.local/share/letsencrypt/lib/python2.7/site-packages/letsencr x
x ypt_apache/configurator.py”, line 142, in prepare x
x raise errors.NoInstallationError x
x NoInstallationError x
x No candidate plugin x
x Selected authenticator None and installer None
The Apache plugin uses the following files/programs for the detection of a valid/working Apache installation on CentOS:
CLI_DEFAULTS_CENTOS = dict(
server_root="/etc/httpd",
vhost_root="/etc/httpd/conf.d",
vhost_files="*.conf",
version_cmd=['apachectl', '-v'],
define_cmd=['apachectl', '-t', '-D', 'DUMP_RUN_CFG'],
restart_cmd=['apachectl', 'graceful'],
conftest_cmd=['apachectl', 'configtest'],
enmod=None,
dismod=None,
le_vhost_ext="-le-ssl.conf",
handle_mods=False,
handle_sites=False,
challenge_location="/etc/httpd/conf.d"
Perhaps you could verify your setup if the files/directories above exist? (Skipping le_vhost_ext, that’s not relevant.)
By the way, this is only necessary if you really want to fully automate Let’s Encrypt. If that’s not (yet) needed and you just want a certificate, you can look at the webroot plugin, IMO the next best thing.
Ah, I have yet to setup vhosts as this server is new, and I am just configuring the box.
Ok just installed some vhosts now. Still getting the same error.
I checked and the vhost file in my standard centos / apache installation is at
/etc/httpd/conf/httpd.conf
not under /etc/httpd/conf.d where letsencrypt is searching.
Files exist in the conf.d folder, but not those of apache. This blog shows also that the apache conf location is the one I am quoting http://www.server-world.info/en/note?os=CentOS_7&p=httpd
That blog is rather inconsistent: in step 1 it says conf.d, but in step 2 it says conf. Strange.
Why wouldn’t you just use /etc/httpd/conf.d/? Does your Apache still work normally if you change it to that location?
Like @alphabootis mentioned, the auto-installer for apache doesn’t work on CentOS. It’s currently only available on debian-based distributions.
You can use certonly mode with --webroot, --standalone or --manual to get a certificate, and modify your web server configuration manually.
@pfg Then you probably need to look again at the full constants.py from the Apache plugin:
It even supports Gentoo now 
(If you run the latest client source from git at least…)
This is not part of the currently released version, which only supports Debian/Ubuntu. OP can use this guide to run from master. Not sure how far along and stable this is either.
Thx, I understand I can use the manual stuff, but not really interested in that. I would like to get my Webmin / Virtualmin working with this for domain auto cert updates…Will then wait for a fix for Centos 
You can get the certificates and then install them manually.
./letsencrypt-auto --text --agree-tos --email <youremail> certonly --renew-by-default --webroot --webroot-path /home/<username>/public_html/ -d <yourdomain>
The certificates will be stored under /etc/letsencrypt/live/$domain/cert.pem
This might be a bit old of a thread, but I was able to get the installer to work once I moved my VirtualDomains into the /domains-available and /domains-enabled/ directories. My old Apache was pretty much the monolithic httpd.conf file.
Here is a web page with instructions specifically for CentOS7 and apache:
I used these instructions and the install went “smooth as silk”.
BUT, I do have some “iisues”. Please read this post here on the forum to take a look:
Good luck!