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Configuration

Authelia has several methods of configuration available to it. The order of precedence is as follows:

  1. Secrets
  2. Environment Variables
  3. Files (in order of them being specified)

This order of precedence puts higher weight on things higher in the list. This means anything specified in the files is overridden by environment variables if specified, and anything specified by environment variables is overridden by secrets if specified.

Files

When running Authelia, you can specify your configuration by passing the file path as shown below.

$ authelia --config config.custom.yml

You can have multiple configuration files which will be merged in the order specified. If duplicate keys are specified the last one to be specified is the one that takes precedence. Example:

$ authelia --config config.yml --config config-acl.yml --config config-other.yml
$ authelia --config config.yml,config-acl.yml,config-other.yml

Authelia’s configuration files use the YAML format. A template with all possible options can be found at the root of the repository here.

Environment

You may also provide the configuration by using environment variables. Environment variables are applied after the configuration file meaning anything specified as part of the environment overrides the configuration files. The environment variables must be prefixed with AUTHELIA_.

Please Note: It is not possible to configure the access control rules section or OpenID Connect identity provider section using environment variables at this time.

Please Note: There are compatability issues with Kubernetes and this particular configuration option. You must ensure you have the enableServiceLinks: false setting in your pod spec. You can read more about this in the migration documentation.

Underscores replace indented configuration sections or subkeys. For example the following environment variables replace the configuration snippet that follows it:

AUTHELIA_LOG_LEVEL=info
AUTHELIA_SERVER_READ_BUFFER_SIZE=4096
log:
  level: info
server:
  read_buffer_size: 4096

Documentation

We document the configuration in two ways:

  1. The configuration yaml default has comments documenting it. All documentation lines start with ##. Lines starting with a single # are yaml configuration options which are commented to disable them or as examples.

  2. This documentation site. Generally each section of the configuration is in its own section of the documentation site. Each configuration option is listed in its relevant section as a heading, under that heading generally are two or three colored labels.

    • The type label is purple and indicates the yaml value type of the variable. It optionally includes some additional information in parentheses.
    • The default label is blue and indicates the default value if you don’t define the option at all. This is not the same value as you will see in the examples in all instances, it is the value set when blank or undefined.
    • The required label changes color. When required it will be red, when not required it will be green, when the required state depends on another configuration value it is yellow.

Validation

Authelia validates the configuration when it starts. This process checks multiple factors including configuration keys that don’t exist, configuration keys that have changed, the values of the keys are valid, and that a configuration key isn’t supplied at the same time as a secret for the same configuration option.

You may also optionally validate your configuration against this validation process manually by using the validate-config option with the Authelia binary as shown below. Keep in mind if you’re using secrets you will have to manually provide these if you don’t want to get certain validation errors (specifically requesting you provide one of the secret values). You can choose to ignore them if you know what you’re doing. This command is useful prior to upgrading to prevent configuration changes from impacting downtime in an upgrade. This process does not validate integrations, it only checks that your configuration syntax is valid.

$ authelia validate-config configuration.yml

Duration Notation Format

We have implemented a string based notation for configuration options that take a duration. This section describes its usage. You can use this implementation in: session for expiration, inactivity, and remember_me_duration; and regulation for ban_time, and find_time. This notation also supports just providing the number of seconds instead.

The notation is comprised of a number which must be positive and not have leading zeros, followed by a letter denoting the unit of time measurement. The table below describes the units of time and the associated letter.

Unit Associated Letter
Years y
Months M
Weeks w
Days d
Hours h
Minutes m
Seconds s

Examples:

  • 1 hour and 30 minutes: 90m
  • 1 day: 1d
  • 10 hours: 10h

TLS Configuration

Various sections of the configuration use a uniform configuration section called TLS. Notably LDAP and SMTP. This section documents the usage.

Server Name

type: string

default: “”

required: no

The key server_name overrides the name checked against the certificate in the verification process. Useful if you require to use a direct IP address for the address of the backend service but want to verify a specific SNI.

Skip Verify

type: boolean

default: false

required: no

The key skip_verify completely negates validating the certificate of the backend service. This is not recommended, instead you should tweak the server_name option, and the global option certificates directory.

Minimum Version

type: string

default: TLS1.2

required: no

The key minimum_version controls the minimum TLS version Authelia will use when opening TLS connections. The possible values are TLS1.3, TLS1.2, TLS1.1, TLS1.0. Anything other than TLS1.3 or TLS1.2 are very old and deprecated. You should avoid using these and upgrade your backend service instead of decreasing this value.


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