This docker-compose is meant as an example for running our lancache stack, It will run out of the box with minimal changes to the .env file for your local IP address and disk settings.
Once (and only once) you have a working system run sudo ./enable_autostart.sh to allow the containers to run at system startup
You MUST set at least
LANCACHE_IPandDNS_BIND_IP. It is highly recommended that you changeCACHE_ROOTto a folder of your choosing, and setCACHE_DISK_SIZEto a value that suits your storage capacity.
This controls IP assignment within the DNS service - it assumes that every service is reachable by default on every IP given in LANCACHE_IP. See the lancache-dns project for documentation on customising the behaviour of the DNS service.
This provides one or more IP addresses to the DNS service to advertise the cached services. If your cache host has exactly one IP address (e.g. 192.168.0.10), specify that here. If your cache host has more IP addresses, you can list all of them, separated by spaces (e.g. 192.168.0.10 192.168.0.11 192.168.0.12) - DNS entries will be configured for all services and all IPs by default.
Note: unless your cache host is at
10.0.39.1, you will want to change this value.
This sets the IP address that the DNS service will listen on. If your cache host has exactly one IP address (eg. 192.168.0.10), specify that here. If your cache host has multiple IPs, specify exactly one and use that. This compose stack does not support the DNS service listening on multiple IPs by default.
Note: unless your cache host is at
10.0.39.1, you will want to change this value.
There are a few ways to make your local network aware of the cache server.
- Advertise the IP given in
DNS_BIND_IPvia DHCP to your network as a nameserver. In this scenario, all clients configured to use the nameservers from DNS will use thelancache-dnsservice. This allows thelancache-dnsservice to provide clients with the appropriate local IPs for cached services, and all other requests will be passed toUPSTREAM_DNS. - Use the configuration generators available from UKLANs' cache-domains project to create configuration data to load into your network's existing DNS infrastructure
This allows you to choose one or more IP addresses for upstream DNS resolution if a name is not matched by the lancache-dns service (e.g. non-cached services, local hostname resolution).
Whichever resolver you choose depends on your network's requirements - if you don't need to provide internal DNS names, you can point UPSTREAM_DNS directly to an external resolver (the default is Google's DNS at 8.8.8.8).
If you run internal services on your network, you can set UPSTREAM_DNS to be your internal DNS resolver(s), semicolon separated (e.g. 192.168.0.1; 192.168.0.2).
- Google DNS:
8.8.8.88.8.4.4
- Cloudflare
1.1.1.1
- OpenDNS
208.67.222.222208.67.220.220
This will be used as the base directory for storing cached data (as CACHE_ROOT/cache) and logs (as CACHE_ROOT/logs).
The CACHE_ROOT should either be on a separate partition, or ideally on separate storage devices entirely, from your system root.
Note: this setting defaults to
./lancache. Unless your cache storage lives here, you probably want to change this value.
This setting will constrain the upper limit of space used by cached data. The cache server will automatically delete cached data when the total stored amount approaches this limit, in a least-recently-used fashion (oldest data, least accessed deleted first).
Note: that this must be given in either:
- gigabytes, with
gsuffix (e.g. the default value,2000g)- terabytes, with
tsuffix (e.g.4t)
Configures the minimum amount of free disk space that must be kept at all times. This setting avoids the scenario where the disk can accidentally become completely full, and no further data can be written.
When the available free space drops below the set amount for any reason, the cache server will begin pruning content in a least-recently-used fashion, similar to how CACHE_DISK_SIZE works.
Change this to allow sufficient index memory for the nginx cache manager (default 500m) We recommend 250m of index memory per 1TB of CACHE_DISK_SIZE
Note: this setting does not limit the amount of memory that the Linux host will use for page caches, only what the cache server will use itself - see the Docker documentation on limiting memory consumption for a container if you wish to constrain the total memory consumption of the cache server, but generally you want as much memory as possible on your cache server to be used to store hot data.
This setting allows you to control the maximum duration cached data will be kept for. The default should be fine for most use cases - the CACHE_DISK_SIZE setting will generally be used before this for aging out data.
Note: this must be given as a number of days in age before expiry, with a
dsuffix (e.g. the default value,3650d).
This setting allows you to set the timezone that is used by the docker containers. Most notably changing the timestamps of the logs. Useful for debugging without having to think sometimes multiple hours in the future/past.
For a list of all timezones see https://en.wikipedia.org/wiki/List_of_tz_database_time_zones.
The LanCache docker-stack is generated automatically from the data over at UKLans. All services that are listed in the UKLans repository are available and supported inside this docker-compose.
For an FAQ see https://lancache.net/docs/faq/
