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Configuration

Chaos Engine reads configuration from multiple locations, and in multiple naming conventions.

application.properties file

As a Spring Boot application, the application will look for a file named application.properties in the ./config folder. This file should be formatted with one variable per line, in the format of key=value.

Line breaks can be made by adding a backslash (\) at the end of the line.

aws.ec2.routableCidrBlocks=10.0.0.0/8,192.168.100.0/24
aws.ec2.filter.tag.chaosTestTag=chaosTesting
aws.ec2.filter.keyName=chaosTestKey
aws.ec2.privateSshKeys.chaosTestKey=-----BEGIN RSA PRIVATE KEY-----\
MIIEpgIBAAKCAQEAuENqLqKYT7vld6EvSK1myOH29dX2lb3sLEXcHybgKGr1kjjU\
...
cxsbp/4QHL+kwxzKqF6w3s6ZQ5sOh8vBoUf3RhdjM7NY7dQOHhUltfN6\
-----END RSA PRIVATE KEY-----

Environment Variables

Environment variables can be read as configuration properties. Given their naming restrictions, Spring Framework remaps them intelligently such that an underscore can either represent a period or a new word with camelCaps.

Environment Variable	Parsed as
AWS_EC2_ROUTABLE_CIDR_BLOCKS	aws.ec2.routableCidrBlocks
AWS_EC2_FILTER_TAG_CHAOS_TEST_TAG	aws.ec2.filter.tag.chaosTestTag
AWS_EC2_PRIVATE_SSH_KEYS_TEST_KEY	aws.ec2.privateSshKeys.testKey

Vault

Vault needs to be configured using one of the other methods. Once configured, properties from Vault are loaded in. Secrets need to be named in the same manner as in the application.properties file configuration.