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Configuring The Fleet Binary

For information on how to run the fleet binary, detailed usage information can be found by running fleet --help. This document is a more detailed version of the information presented in the help output text. If you prefer to use a CLI instead of a web browser, we hope that you like the binary interface to the Fleet application!

High-level configuration overview

To get the most out of running the Fleet server, it is helpful to establish a mutual understanding of what the desired architecture looks like and what it's trying to accomplish.

Your Fleet server's two main purposes are:

The Fleet server allows you persist configuration, manage users, etc. Thus, it needs a database. Fleet uses MySQL and requires you to supply configurations to connect to a MySQL server. Fleet also uses Redis to perform some more high-speed data access action throughout the lifecycle of the application (for example, distributed query result ingestion). Thus, Fleet also requires that you supply Redis connention configurations.

Since Fleet is a web application, when you run Fleet there are some other configurations that are worth defining, such as:

  • The TLS certificates that Fleet should use to terminate TLS.
  • The JWT Key which is used to sign and verify session tokens.

Since Fleet is an osquery TLS server, you are also able to define configurations that can customize your experience there, such as:

  • The destination of the osquery status and result logs on the local filesystem
  • Various details about the refresh/check-in intervals for your hosts

Commands

The fleet binary contains several "commands". Similarly to how git has many commands (git status, git commit, etc), the fleet binary accepts the following commands:

  • fleet prepare db
  • fleet serve
  • fleet version
  • fleet config_dump

Options

How do you specify options?

In order of precedence, options can be specified via:

  • A configuration file (in YAML format)
  • Environment variables
  • Command-line flags

For example, all of the following ways of launching Fleet are equivalent:

Using only CLI flags

$ /usr/bin/fleet serve \
  --mysql_address=127.0.0.1:3306 \
  --mysql_database=kolide \
  --mysql_username=root \
  --mysql_password=toor \
  --redis_address=127.0.0.1:6379 \
  --server_cert=/tmp/server.cert \
  --server_key=/tmp/server.key \
  --logging_json

Using only environment variables

$ KOLIDE_MYSQL_ADDRESS=127.0.0.1:3306 \
  KOLIDE_MYSQL_DATABASE=kolide \
  KOLIDE_MYSQL_USERNAME=root \
  KOLIDE_MYSQL_PASSWORD=toor \
  KOLIDE_REDIS_ADDRESS=127.0.0.1:6379 \
  KOLIDE_SERVER_CERT=/tmp/server.cert \
  KOLIDE_SERVER_KEY=/tmp/server.key \
  KOLIDE_LOGGING_JSON=true \
  /usr/bin/fleet serve

Using a config file

$ echo '
mysql:
  address: 127.0.0.1:3306
  database: kolide
  username: root
  password: toor
redis:
  address: 127.0.0.1:6379
server:
  cert: /tmp/server.cert
  key: /tmp/server.key
logging:
  json: true
' > /tmp/kolide.yml
$ fleet serve --config /tmp/kolide.yml

What are the options?

Note that all option names can be converted consistently from flag name to environment variable and visa-versa. For example, the --mysql_address flag would be the KOLIDE_MYSQL_ADDRESS. Further, specifying the mysql_address option in the config would follow the pattern:

mysql:
  address: 127.0.0.1:3306

Basically, just capitalize the option and prepend KOLIDE_ to it in order to get the environment variable. The conversion works the same the opposite way.

MySQL

mysql_address

The address of the MySQL server which Fleet should connect to. Include the hostname and port.

  • Default value: localhost:3306

  • Environment variable: KOLIDE_MYSQL_ADDRESS

  • Config file format:

     mysql:
     	address: localhost:3306
    
mysql_database

The name of the MySQL database which Fleet will use.

  • Default value: kolide

  • Environment variable: KOLIDE_MYSQL_DATABASE

  • Config file format:

     mysql:
     	database: kolide
    
mysql_username

The username to use when connecting to the MySQL instance.

  • Default value: kolide

  • Environment variable: KOLIDE_MYSQL_USERNAME

  • Config file format:

     mysql:
     	username: kolide
    
mysql_password

The password to use when connecting to the MySQL instance.

  • Default value: kolide

  • Environment variable: KOLIDE_MYSQL_PASSWORD

  • Config file format:

     mysql:
     	password: kolide
    
mysql_tls_ca

The path to a PEM encoded certificate of MYSQL's CA for client certificate authentication.

  • Default value: none

  • Environment variable: KOLIDE_MYSQL_TLS_CA

  • Config file format:

     mysql:
     	tls_ca: /path/to/server-ca.pem
    
mysql_tls_cert

The path to a PEM encoded certificate use for tls authentication.

  • Default value: none

  • Environment variable: KOLIDE_MYSQL_TLS_CERT

  • Config file format:

     mysql:
     	tls_cert: /path/to/certificate.pem
    
mysql_tls_key

The path to a PEM encoded private key use for tls authentication.

  • Default value: none

  • Environment variable: KOLIDE_MYSQL_TLS_KEY

  • Config file format:

     mysql:
     	tls_key: /path/to/key.pem
    
mysql_tls_config

The tls value in a MYSQL DSN. Can be true,false,skip-verify or the CN value of the certificate.

  • Default value: none

  • Environment variable: KOLIDE_MYSQL_TLS_CONFIG

  • Config file format:

     mysql:
     	tls_config: true
    
mysql_tls_server_name

The server name or IP address used by the client certificate.

  • Default value: none

  • Environment variable: KOLIDE_MYSQL_TLS_SERVER_NAME

  • Config file format:

     mysql:
     	servername: 127.0.0.1
    
mysql_max_open_conns

Maximum open connections to database

  • Default value: 50

  • Environment variable: KOLIDE_MYSQL_MAX_OPEN_CONNS

  • Config file format:

     mysql:
     	max_open_conns: 50
    
mysql_max_idle_conns

Maximum idle connections to database. This value should be equal to or less than mysql_max_open_conns

  • Default value: 50

  • Environment variable: KOLIDE_MYSQL_MAX_IDLE_CONNS

  • Config file format:

     mysql:
     	max_idle_conns: 50
    

Redis

redis_address

The address of the Redis server which Fleet should connect to. Include the hostname and port.

  • Default value: localhost:6379

  • Environment variable: KOLIDE_REDIS_ADDRESS

  • Config file format:

     redis:
     	address: 127.0.0.1:7369
    
redis_password

The password to use when connecting to the Redis instance.

  • Default value: <empty>

  • Environment variable: KOLIDE_REDIS_PASSWORD

  • Config file format:

     redis:
     	password: foobar
    

Server

server_address

The address to serve the Kolide webserver.

  • Default value: 0.0.0.0:8080

  • Environment variable: KOLIDE_SERVER_ADDRESS

  • Config file format:

     server:
     	address: 0.0.0.0:443
    
server_cert

The TLS cert to use when terminating TLS.

  • Default value: ./tools/osquery/kolide.crt

  • Environment variable: KOLIDE_SERVER_CERT

  • Config file format:

     server:
     	cert: /tmp/kolide.crt
    
server_key

The TLS key to use when terminating TLS.

  • Default value: ./tools/osquery/kolide.key

  • Environment variable: KOLIDE_SERVER_KEY

  • Config file format:

     server:
     	key: /tmp/kolide.key
    
server_tls

Whether or not the server should be served over TLS.

  • Default value: true

  • Environment variable: KOLIDE_SERVER_TLS

  • Config file format:

     server:
     	tls: false
    

Auth

auth_jwt_key

The JWT key to use when signing and validating session keys. If this value is not specified the Fleet server will fail to start and a randomly generated key will be provided for use.

  • Default value: None

  • Environment variable: KOLIDE_AUTH_JWT_KEY

  • Config file format:

     auth:
     	jwt_key: JVnKw7CaUdJjZwYAqDgUHVYP
    
auth_bcrypt_cost

The bcrypt cost to use when hashing user passwords.

  • Default value: 12

  • Environment variable: KOLIDE_AUTH_BCRYT_COST

  • Config file format:

     auth:
     	bcrypt_cost: 14
    
auth_salt_key_size

The key size of the salt which is generated when hashing user passwords.

  • Default value: 24

  • Environment variable: KOLIDE_AUTH_SALT_KEY_SIZE

  • Config file format:

     auth:
     	salt_key_size: 36
    

App

app_token_key_size

Size of generated app tokens.

  • Default value: 24

  • Environment variable: KOLIDE_APP_TOKEN_KEY_SIZE

  • Config file format:

     app:
     	token_key_size: 36
    
app_invite_token_validity_period

How long invite tokens should be valid for.

  • Default value: 5 days

  • Environment variable: KOLIDE_APP_TOKEN_VALIDITY_PERIOD

  • Config file format:

     app:
     	invite_token_validity_period: 1d
    

Session

session_key_size

The size of the session key.

  • Default value: 64

  • Environment variable: KOLIDE_SESSION_KEY_SIZE

  • Config file format:

     session:
     	key_size: 48
    
session_duration

The amount of time that a session should last for.

  • Default value: 90 days

  • Environment variable: KOLIDE_SESSION_DURATION

  • Config file format:

     session:
     	duration: 30d
    

Osquery

osquery_node_key_size

The size of the node key which is negotiated with osqueryd clients.

  • Default value: 24

  • Environment variable: KOLIDE_OSQUERY_NODE_KEY_SIZE

  • Config file format:

     osquery:
     	node_key_size: 36
    
osquery_status_log_file

The path which osquery status logs will be logged to.

  • Default value: /tmp/osquery_status

  • Environment variable: KOLIDE_OSQUERY_STATUS_LOG_FILE

  • Config file format:

     osquery:
     	status_log_file: /var/log/osquery/status.log
    
osquery_result_log_file

The path which osquery result logs will be logged to.

  • Default value: /tmp/osquery_result

  • Environment variable: KOLIDE_OSQUERY_RESULT_LOG_FILE

  • Config file format:

     osquery:
     	result_log_file: /var/log/osquery/result.log
    
osquery_label_update_interval

The interval at which Fleet will ask osquery agents to update their results for label queries.

  • Default value: 1h

  • Environment variable: KOLIDE_OSQUERY_LABEL_UPDATE_INTERVAL

  • Config file format:

     osquery:
     	label_query_update_interval: 30m
    
osquery_enable_log_rotation

This flag will cause the osquery result and status log files to be automatically rotated when files reach a size of 500 Mb or an age of 28 days.

  • Default value: false

  • Environment variable: KOLIDE_OSQUERY_ENABLE_LOG_ROTATION

  • Config file format:

    osquery:
       enable_log_rotation: true
    

Logging

logging_debug

Whether or not to enable debug logging.

  • Default value: false

  • Environment variable: KOLIDE_LOGGING_DEBUG

  • Config file format:

     logging:
     	debug: true
    
logging_json

Whether or not to log in JSON.

  • Default value: false

  • Environment variable: KOLIDE_LOGGING_JSON

  • Config file format:

     logging:
     	json: true
    
logging_disable_banner

Whether or not to log the welcome banner.

  • Default value: false

  • Environment variable: KOLIDE_LOGGING_DISABLE_BANNER

  • Config file format:

     logging:
     	diable_banner: true