mesosdns-resolver.sh

A bash script to resolve Mesos DNS SRV record to actual host:port endpoints

Prerequisites

dig has to be available on the system.

Installation

Run curl -cL https://raw.githubusercontent.com/tobilg/mesosdns-resolver/master/mesosdns-resolver.sh > /usr/bin/mesosdns-resolver.sh && chmod +x /usr/bin/mesosdns-resolver.sh to install the script locally.

Usage

mesosdns-resolver.sh [options]

A service name has to be supplied, all other options are non-mandatory.

Options:

• -sn <service name> or --serviceName <service name> : (MANDATORY) The Mesos DNS service name (such as web.marathon.mesos).
• -s <server ip> or --server <server ip> : Can be use to query a specify DNS server. Uses local server by default.
• -d or --drill : Use drill instead of dig for name resolution, as dig is not available in Alpine Linux (and it has a smaller footprint).
• -m or --mesosSuffix : To resolve service groups the name suffix is needed (defaults to marathon.mesos in mesos DNS), keep in mind that the script does NOT set a default for backwards compatibility reasons.
• -a or --all : If specified, all endpoints of a service will be returned, with standard separator "comma".
• -pi <port index> or --portIndex <port index> : By default, the first port (index 0) will be returned. If another port index shall be used, specify the index.
• -se <separator> or --separator <separator> : The separator to be used then concatenating multiple endpoint results (only usable together with the --all parameter).