Simulate Process Faults

This document describes how to use Chaosd to simulate process faults. The process faults use the Golang interface of the kill command to simulate the scenarios that the process is killed or stopped. You can create experiments either in command-line mode or service mode.

Create experiments in command-line mode

Before creating an experiment, you can run the following command to see the process fault types that are supported by Chaosd:

chaosd attack process -h

The output is as follows:

Process attack related commands
Usage:
  chaosd attack process [command]
Available Commands:
  kill        kill process, default signal 9
  stop        stop process, this action will stop the process with SIGSTOP
Flags:
  -h, --help   help for process
Global Flags:
      --log-level string   the log level of chaosd, the value can be 'debug', 'info', 'warn' and 'error'
Use "chaosd attack process [command] --help" for more information about a command.

Currently, Chaosd supports simulating that a process is killed or stopped.

Killing a process

Command simulating that a process is killed

chaosd attack process kill -h

The output is as follows:

kill process, default signal 9
Usage:
  chaosd attack process kill [flags]
Flags:
  -h, --help             help for kill
  -p, --process string   The process name or the process ID
  -s, --signal int       The signal number to send (default 9)
Global Flags:
      --log-level string   the log level of chaosd, the value can be 'debug', 'info', 'warn' and 'error'

Configuration description of simulating a process being killed

Example simulating that a process is killed

chaosd attack process kill -p python

The output is as follows:

Attack process python successfully, uid: 10e633ac-0a37-41ba-8b4a-cd5ab92099f9

Stopping a process

Command simulating that a process is stopped

chaosd attack process stop -h

The output is as follows:

stop process, this action will stop the process with SIGSTOP
Usage:
  chaosd attack process stop [flags]
Flags:
  -h, --help             help for stop
  -p, --process string   The process name or the process ID
Global Flags:
      --log-level string   the log level of chaosd, the value can be 'debug', 'info', 'warn' and 'error'

Configuration description of simulating a process being stopped

Example simulating that a process is stopped

chaosd attack process stop -p python

The output is as follows:

Attack process python successfully, uid: 9cb6b3be-4f5b-4ecb-ae05-51050fcd0010

Create experiments in service mode

(To be added)