icetail/docker-letsencrypt repository overview

The LinuxServer.io⁠ team brings you another container release featuring easy user mapping and community support. Find us for support at:

• forum.linuxserver.io⁠
• IRC⁠ on freenode at #linuxserver.io
• Podcast⁠ covers everything to do with getting the most from your Linux Server plus a focus on all things Docker and containerisation!

⁠linuxserver/letsencrypt

[][hub][][hub] [hub]: https://hub.docker.com/r/linuxserver/letsencrypt/⁠

This container sets up an Nginx webserver and reverse proxy with php support and a built-in letsencrypt client that automates free SSL server certificate generation and renewal processes. It also contains fail2ban for intrusion prevention.

[][letsurl] [letsurl]: https://letsencrypt.org/⁠

⁠Usage

docker create \
  --privileged \
  --name=letsencrypt \
  -v <path to data>:/config \
  -e PGID=<gid> -e PUID=<uid>  \
  -e EMAIL=<email> \
  -e URL=<url> \
  -e SUBDOMAINS=<subdomains> \
  -p 443:443 \
  -e TZ=<timezone> \
  linuxserver/letsencrypt

⁠Parameters

The parameters are split into two halves, separated by a colon, the left hand side representing the host and the right the container side. For example with a port -p external:internal - what this shows is the port mapping from internal to external of the container. So -p 8080:80 would expose port 80 from inside the container to be accessible from the host's IP on port 8080 http://192.168.x.x:8080 would show you what's running INSIDE the container on port 80.

• -p 443 - the port(s)
• -v /config - all the config files including the webroot reside here
• -e EMAIL - your e-mail address for cert registration
• -e URL - the top url you have control over ("customdomain.com" if you own it, or "customsubdomain.ddnsprovider.com" if dynamic dns)
• -e SUBDOMAINS - subdomains you'd like the cert to cover (comma separated, no spaces) ie. www,ftp,cloud
• -e PGID for GroupID - see below for explanation
• -e PUID for UserID - see below for explanation
• -e TZ - timezone ie. America/New_York

Optional settings:

• -e DHLEVEL - dhparams bit value (default=2048, can be set to 1024 or 4096)
• -p 80 - Port 80 forwarding is optional (cert validation is done through 443)
• -e ONLY_SUBDOMAINS - if you wish to get certs only for certain subdomains, but not the main domain (main domain may be hosted on another machine and cannot be validated), set this to true

It is based on alpine linux with s6 overlay, for shell access whilst the container is running do docker exec -it letsencrypt /bin/bash.

⁠User / Group Identifiers

Sometimes when using data volumes (-v flags) permissions issues can arise between the host OS and the container. We avoid this issue by allowing you to specify the user PUID and group PGID. Ensure the data volume directory on the host is owned by the same user you specify and it will "just work" ™.

In this instance PUID=1001 and PGID=1001. To find yours use id user as below:

  $ id <dockeruser>
    uid=1001(dockeruser) gid=1001(dockergroup) groups=1001(dockergroup)

⁠Setting up the application

• Before running this container, make sure that the url and subdomains are properly forwarded to this container's host.
• Port 443 on the internet side of the router should be forwarded to this container's port 443.
• If you need a dynamic dns provider, you can use the free provider duckdns.org where the url will be yoursubdomain.duckdns.org and the subdomains can be www,ftp,cloud
• The container detects changes to url and subdomains, revokes existing certs and generates new ones during start. It also detects changes to the DHLEVEL parameter and replaces the dhparams file.
• If you'd like to password protect your sites, you can use htpasswd. Run the following command on your host to generate the htpasswd file docker exec -it letsencrypt htpasswd -c /config/nginx/.htpasswd <username>

⁠Info

• Shell access whilst the container is running: docker exec -it letsencrypt /bin/bash

• To monitor the logs of the container in realtime: docker logs -f letsencrypt

• container version number

docker inspect -f '{{ index .Config.Labels "build_version" }}' letsencrypt

• image version number

docker inspect -f '{{ index .Config.Labels "build_version" }}' linuxserver/letsencrypt

⁠Versions

• 13.01.2017: Add php5-ctype and php5-openssl
• 04.01.2017: Add php5-mysqli and php5-pdo_mysql
• 22.11.2016: Add gd and mcrypt packages
• 21.11.2016: Add curl package
• 07.11.2016: Initial Release