Buildkite Agent Prioritization

By setting an Agent’s priority value you are able to designate which priority it gets for being assigned build jobs to run. Higher priority Agents are assigned work first, with the last priority being given to Agents with the default value of null.

To set an Agent’s priority you can set it in the configuration file:

priority=9

or with the --priority command line flag:

buildkite-agent start --priority 9

or with the BUILDKITE_AGENT_PRIORITY an environment variable:

env BUILDKITE_AGENT_PRIORITY=9 buildkite-agent start

Load balancing

You can use the Agent priority value to load balance jobs across machines running multiple Agents.

For example if you have 2 machines with 3 Agents on each machine, you would set one Agent on each machine to priority=3, one on each to priority=2, and one on each to priority=1.

Buildkite will then automatically load balance the jobs across machines, as it will assign jobs to the high priority agents first.