Good thing about wagl is you almost never need to know about the command-line
arguments. It has good defaults.
By running wagl --help (or docker run --rm ahmet/wagl --help) you
can see the command line arguments:
$ wagl --help
NAME:
wagl - DNS service discovery for Docker Swarm clusters
USAGE:
wagl [options] command [command options]
VERSION:
0.1
OPTIONS:
--bind ":53" IP:port on which the server shoud listen
--swarm "127.0.0.1:2376" address of the Swarm manager
--swarm-cert-path directory TLS certs for Swarm manager is stored [$DOCKER_CERT_PATH]
--swarm-tlsverify verify remote Swarm's identity using TLS [$DOCKER_TLS_VERIFY]
--domain "swarm." DNS domain (FQDN suffix) for which this server is authoritative
--external use external nameservers to resolve DNS requests outside the domain (true by default)
--ns [--ns option --ns option] external nameserver(s) to forward requests (default: nameservers in /etc/resolv.conf)
--refresh "15s" how frequently refresh DNS table from cluster records
--refresh-timeout "10s" time alotted for Swarm to list containers in the cluster
--staleness "1m0s" how long to serve stale DNS records before exiting
--help, -h show help
--version, -v print the version
Some of these arguments can be also picked up from the environment (those specified as [$ENV] above).