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Configuring Obelisk

When Obelisk gets started, it loads the configuration from the environment. It reads the settings in this order:

  • Read environment variables which have a specific name, see section Environment variables.
  • Load from a configuration file which defaults to config.toml in the current working directory.

Sections in the configuration file​

Functionality that can be configured through the configuration file:

Environment variables​

Settings in the configuration file can be overwritten by environment variables, nested fields are separated by two underscores __. The pattern looks like this:

OPENTALK_OBLSK_<field>__<nested-field>…

Limitations​

Some settings can not be overwritten by environment variables. This is for example the case for entries in lists, because there is no environment variable naming pattern that could identify the index of the entry inside the list.

Examples​

In order to set the auth.client_id field, this environment variable could be used:

OPENTALK_OBLSK_AUTH__CLIENT_ID=Obelisk

Example configuration file​

This file can be found in the source code distribution under extra/example.toml

# SPDX-FileCopyrightText: OpenTalk GmbH <mail@opentalk.eu>
#
# SPDX-License-Identifier: EUPL-1.2

# The clock format of the timestamp displayed inside the stream.
clock_format = "%x %X %Z"

# Obelisk OIDC authentication
#
# The Client requires a service account with the `opentalk-call-in` realm-role set.
[auth]
# OIDC issuer url
issuer = "http://localhost/auth/realms/Example"
# OIDC client ID
client_id = "Obelisk"
# OIDC client secret
client_secret = "obeliskclientsecret"

[controller]
# host-port of the controller
domain = "localhost:8000"

# Optional flag to use http/ws instead of their TLS counterparts
#insecure = false

[sip]

# Local IP address to bind to (0.0.0.0 binds to every address)
addr = "0.0.0.0"

# Port to bind to (5060 is SIP default)
port = 5060

# ID of this SIP endpoint, used for creating the From/To header in SIP REGISTER messages
# When not set, it is generated as `sip:<username>@<regisrar-host>` if a registrar is configured.
# If no registrar is configured it is generated the same way as the contact uri (see below).
#id = "sip:alice@example.org"

# Contact uri of this SIP endpoint, used for creating the SIP Contact header
# When not set, it is generated as `sip:<username>@<addr>` where `addr` may be replaced by the
# public address discovered using the stun-server.
#contact = "sip:alice@example.org"

# Username/Password pair.
# Usually provided by the SIP provider
username = "alice"
password = "mysecurepassword"

# Realm of the given username/password pair
realm = "example.org"

# SIP URI of the registrar
registrar = "sip:sip.example.org"

# Specify a SIP proxy to send all requests to
#outbound_proxy = "sip:someotherserver.example.org"

# Seconds between ping/pong to keep NAT binding alive
#nat_ping_delta = 30

# Host-port of the stun server used for SIP
stun_server = "stun.example.org:3478"

# Enforce quality of protection on SIP authentication
# (reuse of nonce + nonce-count instead of requesting a new nonce for each request)
#
# Can cause compatibility issues on older registrars.
enforce_qop = true

# Maximum video bitrate in kbits/s
#max_video_bitrate = 6000

# The port range for the SIP RTP/RTCP connections (inclusive).
#
# Defaults to 40000 - 49999
[sip.rtp_port_range]
start = 40000
end = 49999