This docker container provides DNS entries for caching services to be used in conjunction with a steamcache/steamcache & steamcache/generic server.
The DNS is generated automatically at startup of the container, the list of supported services is available here: https://github.com/uklans/cache-domains
The primary use case is gaming events, such as LAN parties, which need to be able to cope with hundreds or thousands of computers receiving an unannounced patch - without spending a fortune on internet connectivity. Other uses include smaller networks, such as Internet Cafes and home networks, where the new games are regularly installed on multiple computers; or multiple independent operating systems on the same computer.
For a LAN cache to function on your network you need two services.
- A depot cache service
- A special DNS service
The depot cache service transparently proxies your requests for content to Steam/Origin/Etc, or serves the content to you if it already has it.
The special DNS service handles DNS queries normally (recursively), except when they're about a cached service and in that case it responds that the depot cache service should be used.
If all of the services you wish to run point to a single IP address, you should make sure you set USE_GENERIC_CACHE=true and set LANCACHE_IP to the IP address of the caching server. In this case it is highly recommended that you use some form of load balancer or reverse proxy, as running a single caching server for multiple services will result in cache clashes and will result in incorrect or corrupt data.
Run the steamcache-dns container using the following to allow UDP port 53 (DNS) through the host machine:
docker run --name steamcache-dns -p 10.0.0.2:53:53/udp -e USE_GENERIC_CACHE=true -e LANCACHE_IP=10.0.0.3 steamcache/steamcache-dns:latest
You can specify a different IP for each service hosted within the cache for a full list os supported services have a look at https://github.com/uklans/cache-domains. Set the IP for a service using ${SERVICE}CACHE_IP environment:
LANCACHE_IP (requires USE_GENERIC_CACHE to be set to true)
BLIZZARDCACHE_IP
FRONTIERCACHE_IP
ORIGINCACHE_IP
RIOTCACHE_IP
STEAMCACHE_IP
UPLAYCACHE_IP
You can also disable any of the cache dns resolvers by setting the environment variable of DISABLE_${SERVICE}=true
DISABLE_BLIZZARD
DISABLE_RIOT
DISABLE_UPLAY
To use a custom upstream DNS server, use the UPSTREAM_DNS variable:
docker run --name steamcache-dns -p 10.0.0.2:53:53/udp -e STEAMCACHE_IP=10.0.0.3 -e UPSTREAM_DNS=8.8.8.8 steamcache/steamcache-dns:latest
This will add a forwarder for all queries not served by steamcache to be sent to the upstream DNS server, in this case Google's DNS. If
you have a DNS server on 1.2.3.4, the command argument would be -e UPSTREAM_DNS=1.2.3.4.
Follow the instructions in the Docker documentation to run the container at startup. Documentation
More information can be found at the SteamCache github page
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Copyright (c) 2015-2017 Jessica Smith, Robin Lewis, Brian Wojtczak, Jason Rivers
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