fleet/cmd/osquery-perf

Osquery Server Performance Tester

This is a tool to generate realistic traffic to an osquery management server (primarily, Fleet). With this tool, many thousands of hosts can be simulated from a single host.

Requirements

The only requirement for running this tool is a working installation of Go.

Usage

Typically go run is used.

You can use --help to view the available configuration:

go run agent.go --help

The tool should be invoked with the appropriate enroll secret. A typical invocation looks like:

go run agent.go --enroll_secret hgh4hk3434l2jjf

When starting many hosts, it is a good idea to extend the intervals, and also the period over which the hosts are started:

go run agent.go --enroll_secret hgh4hk3434l2jjf --host_count 5000 --start_period 5m --query_interval 60s --config_interval 5m

This will start 5,000 hosts over a period of 5 minutes. Each host will check in for live queries at a 1 minute interval, and for configuration at a 5 minute interval. Starting over a 5 minute period ensures that the configuration requests are spread evenly over the 5 minute interval.

It can be useful to start the "same" hosts. This can be achieved with the --seed parameter:

go run agent.go --enroll_secret hgh4hk3434l2jjf --seed 0

By using the same seed, along with other values, we usually get hosts that look the same to the server. This is not guaranteed, but it is a useful technique.

Resource Limits

On many systems, trying to simulate a large number of hosts will result in hitting system resource limits (such as number of open file descriptors).

If you see errors such as dial tcp: lookup localhost: no such host or read: connection reset by peer, try increasing these limits.

macOS

Run the following command in the shell before running the Fleet server and before running agent.go (run it once in each shell):

ulimit -n 64000