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linuxserver / docker-swag

Nginx webserver and reverse proxy with php support and a built-in Certbot (Let's Encrypt) client. It also contains fail2ban for intrusion prevention.
https://docs.linuxserver.io/general/swag
GNU General Public License v3.0
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linuxserver.io

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The LinuxServer.io team brings you another container release featuring:

Find us at:

linuxserver/swag

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SWAG - Secure Web Application Gateway (formerly known as letsencrypt, no relation to Let's Encrypt™) sets up an Nginx webserver and reverse proxy with php support and a built-in certbot client that automates free SSL server certificate generation and renewal processes (Let's Encrypt and ZeroSSL). It also contains fail2ban for intrusion prevention.

swag

Supported Architectures

We utilise the docker manifest for multi-platform awareness. More information is available from docker here and our announcement here.

Simply pulling lscr.io/linuxserver/swag:latest should retrieve the correct image for your arch, but you can also pull specific arch images via tags.

The architectures supported by this image are:

Architecture Available Tag
x86-64 ✅ amd64-\<version tag>
arm64 ✅ arm64v8-\<version tag>
armhf ❌

Application Setup

Validation and initial setup

Certbot Plugins

SWAG includes many Certbot plugins out of the box, but not all plugins can be included. If you need a plugin that is not included, the quickest way to have the plugin available is to use our Universal Package Install Docker Mod.

Set the following environment variables on your container:

DOCKER_MODS=linuxserver/mods:universal-package-install
INSTALL_PIP_PACKAGES=certbot-dns-<plugin>

Set the required credentials (usually found in the plugin documentation) in /config/dns-conf/<plugin>.ini. It is recommended to attempt obtaining a certificate with STAGING=true first to make sure the plugin is working as expected.

Security and password protection

Site config and reverse proxy

Using certs in other containers

Using fail2ban

Updating configs

Migration from the old linuxserver/letsencrypt image

Please follow the instructions on this blog post.

Usage

To help you get started creating a container from this image you can either use docker-compose or the docker cli.

docker-compose (recommended, click here for more info)

---
services:
  swag:
    image: lscr.io/linuxserver/swag:latest
    container_name: swag
    cap_add:
      - NET_ADMIN
    environment:
      - PUID=1000
      - PGID=1000
      - TZ=Etc/UTC
      - URL=yourdomain.url
      - VALIDATION=http
      - SUBDOMAINS=www, #optional
      - CERTPROVIDER= #optional
      - DNSPLUGIN=cloudflare #optional
      - PROPAGATION= #optional
      - EMAIL= #optional
      - ONLY_SUBDOMAINS=false #optional
      - EXTRA_DOMAINS= #optional
      - STAGING=false #optional
    volumes:
      - /path/to/swag/config:/config
    ports:
      - 443:443
      - 80:80 #optional
    restart: unless-stopped

docker cli (click here for more info)

docker run -d \
  --name=swag \
  --cap-add=NET_ADMIN \
  -e PUID=1000 \
  -e PGID=1000 \
  -e TZ=Etc/UTC \
  -e URL=yourdomain.url \
  -e VALIDATION=http \
  -e SUBDOMAINS=www, `#optional` \
  -e CERTPROVIDER= `#optional` \
  -e DNSPLUGIN=cloudflare `#optional` \
  -e PROPAGATION= `#optional` \
  -e EMAIL= `#optional` \
  -e ONLY_SUBDOMAINS=false `#optional` \
  -e EXTRA_DOMAINS= `#optional` \
  -e STAGING=false `#optional` \
  -p 443:443 \
  -p 80:80 `#optional` \
  -v /path/to/swag/config:/config \
  --restart unless-stopped \
  lscr.io/linuxserver/swag:latest

Parameters

Containers are configured using parameters passed at runtime (such as those above). These parameters are separated by a colon and indicate <external>:<internal> respectively. For example, -p 8080:80 would expose port 80 from inside the container to be accessible from the host's IP on port 8080 outside the container.

Parameter Function
-p 443 Https port
-p 80 Http port (required for http validation and http -> https redirect)
-e PUID=1000 for UserID - see below for explanation
-e PGID=1000 for GroupID - see below for explanation
-e TZ=Etc/UTC specify a timezone to use, see this list.
-e URL=yourdomain.url Top url you have control over (customdomain.com if you own it, or customsubdomain.ddnsprovider.com if dynamic dns).
-e VALIDATION=http Certbot validation method to use, options are http or dns (dns method also requires DNSPLUGIN variable set).
-e SUBDOMAINS=www, Subdomains you'd like the cert to cover (comma separated, no spaces) ie. www,ftp,cloud. For a wildcard cert, set this exactly to wildcard (wildcard cert is available via dns validation only)
-e CERTPROVIDER= Optionally define the cert provider. Set to zerossl for ZeroSSL certs (requires existing ZeroSSL account and the e-mail address entered in EMAIL env var). Otherwise defaults to Let's Encrypt.
-e DNSPLUGIN=cloudflare Required if VALIDATION is set to dns. Options are acmedns, aliyun, azure, bunny, cloudflare, cpanel, desec, digitalocean, directadmin, dnsimple, dnsmadeeasy, dnspod, do, domeneshop, dreamhost, duckdns, dynu, freedns, gandi, gehirn, glesys, godaddy, google, he, hetzner, infomaniak, inwx, ionos, linode, loopia, luadns, namecheap, netcup, njalla, nsone, ovh, porkbun, rfc2136, route53, sakuracloud, standalone, transip, and vultr. Also need to enter the credentials into the corresponding ini (or json for some plugins) file under /config/dns-conf.
-e PROPAGATION= Optionally override (in seconds) the default propagation time for the dns plugins.
-e EMAIL= Optional e-mail address used for cert expiration notifications (Required for ZeroSSL).
-e ONLY_SUBDOMAINS=false 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
-e EXTRA_DOMAINS= Additional fully qualified domain names (comma separated, no spaces) ie. extradomain.com,subdomain.anotherdomain.org,*.anotherdomain.org
-e STAGING=false Set to true to retrieve certs in staging mode. Rate limits will be much higher, but the resulting cert will not pass the browser's security test. Only to be used for testing purposes.
-v /config Persistent config files

Portainer notice

This image utilises cap_add or sysctl to work properly. This is not implemented properly in some versions of Portainer, thus this image may not work if deployed through Portainer.

Environment variables from files (Docker secrets)

You can set any environment variable from a file by using a special prepend FILE__.

As an example:

-e FILE__MYVAR=/run/secrets/mysecretvariable

Will set the environment variable MYVAR based on the contents of the /run/secrets/mysecretvariable file.

Umask for running applications

For all of our images we provide the ability to override the default umask settings for services started within the containers using the optional -e UMASK=022 setting. Keep in mind umask is not chmod it subtracts from permissions based on it's value it does not add. Please read up here before asking for support.

User / Group Identifiers

When using 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 any volume directories on the host are owned by the same user you specify and any permissions issues will vanish like magic.

In this instance PUID=1000 and PGID=1000, to find yours use id your_user as below:

id your_user

Example output:

uid=1000(your_user) gid=1000(your_user) groups=1000(your_user)

Docker Mods

Docker Mods Docker Universal Mods

We publish various Docker Mods to enable additional functionality within the containers. The list of Mods available for this image (if any) as well as universal mods that can be applied to any one of our images can be accessed via the dynamic badges above.

Support Info

Updating Info

Most of our images are static, versioned, and require an image update and container recreation to update the app inside. With some exceptions (noted in the relevant readme.md), we do not recommend or support updating apps inside the container. Please consult the Application Setup section above to see if it is recommended for the image.

Below are the instructions for updating containers:

Via Docker Compose

Via Docker Run

Image Update Notifications - Diun (Docker Image Update Notifier)

[!TIP] We recommend Diun for update notifications. Other tools that automatically update containers unattended are not recommended or supported.

Building locally

If you want to make local modifications to these images for development purposes or just to customize the logic:

git clone https://github.com/linuxserver/docker-swag.git
cd docker-swag
docker build \
  --no-cache \
  --pull \
  -t lscr.io/linuxserver/swag:latest .

The ARM variants can be built on x86_64 hardware and vice versa using lscr.io/linuxserver/qemu-static

docker run --rm --privileged lscr.io/linuxserver/qemu-static --reset

Once registered you can define the dockerfile to use with -f Dockerfile.aarch64.

Versions