OIDC Authentication

OpenID Connect

The following steps through how to integrate any OpenID Connect provider (Okta, Active Directory, etc.) to Coder.

Step 1: Set Redirect URI with your OIDC provider

Your OIDC provider will ask you for the following parameter:

Redirect URI: Set to https://coder.domain.com/api/v2/users/oidc/callback

Step 2: Configure Coder with the OpenID Connect credentials

Set the following environment variables on your Coder deployment and restart Coder:

CODER_OIDC_ISSUER_URL="https://issuer.corp.com"
CODER_OIDC_EMAIL_DOMAIN="your-domain-1,your-domain-2"
CODER_OIDC_CLIENT_ID="533...des"
CODER_OIDC_CLIENT_SECRET="G0CSP...7qSM"

OIDC Claims

When a user logs in for the first time via OIDC, Coder will merge both the claims from the ID token and the claims obtained from hitting the upstream provider's userinfo endpoint, and use the resulting data as a basis for creating a new user or looking up an existing user.

To troubleshoot claims, set CODER_LOG_FILTER=".*got oidc claims.*" and follow the logs while signing in via OIDC as a new user. Coder will log the claim fields returned by the upstream identity provider in a message containing the string got oidc claims, as well as the user info returned.

> [!NOTE] > If you need to ensure that Coder only uses information from the ID > token and does not hit the UserInfo endpoint, you can set the configuration > option CODER_OIDC_IGNORE_USERINFO=true.

Email Addresses

By default, Coder will look for the OIDC claim named email and use that value for the newly created user's email address.

If your upstream identity provider users a different claim, you can set CODER_OIDC_EMAIL_FIELD to the desired claim.

> [!NOTE] > If this field is not present, Coder will attempt to use the claim > field configured for username as an email address. If this field is not a > valid email address, OIDC logins will fail.

Email Address Verification

Coder requires all OIDC email addresses to be verified by default. If the email_verified claim is present in the token response from the identity provider, Coder will validate that its value is true. If needed, you can disable this behavior with the following setting:

CODER_OIDC_IGNORE_EMAIL_VERIFIED=true

> [!NOTE] > This will cause Coder to implicitly treat all OIDC emails as > "verified", regardless of what the upstream identity provider says.

Usernames

When a new user logs in via OIDC, Coder will by default use the value of the claim field named preferred_username as the the username.

If your upstream identity provider uses a different claim, you can set CODER_OIDC_USERNAME_FIELD to the desired claim.

> [!NOTE] > If this claim is empty, the email address will be stripped of the > domain, and become the username (e.g. [email protected] becomes example). > To avoid conflicts, Coder may also append a random word to the resulting > username.

OIDC Login Customization

If you'd like to change the OpenID Connect button text and/or icon, you can configure them like so:

CODER_OIDC_SIGN_IN_TEXT="Sign in with Gitea"
CODER_OIDC_ICON_URL=https://gitea.io/images/gitea.png

To change the icon and text above the OpenID Connect button, see application name and logo url in appearance settings.

Configure Refresh Tokens

By default, OIDC access tokens typically expire after a short period. This is typically after one hour, but varies by provider.

Without refresh tokens, users will be automatically logged out when their access token expires.

Follow Configure OIDC Refresh Tokens for provider-specific steps.

The general steps to configure persistent user sessions are:

Configure your Coder OIDC settings:

For most providers, add the offline_access scope:

CODER_OIDC_SCOPES=openid,profile,email,offline_access

For Google, add auth URL parameters (CODER_OIDC_AUTH_URL_PARAMS) too:

CODER_OIDC_SCOPES=openid,profile,email
CODER_OIDC_AUTH_URL_PARAMS='{"access_type": "offline", "prompt": "consent"}'

Configure your identity provider to issue refresh tokens.
After configuration, have users log out and back in once to obtain refresh tokens

> [!IMPORTANT] > Misconfigured refresh tokens can lead to frequent user authentication prompts.

Disable Built-in Authentication

To remove email and password login, set the following environment variable on your Coder deployment:

CODER_DISABLE_PASSWORD_AUTH=true

SCIM

> [!IMPORTANT] > SCIM is a Premium feature > (learn more). > > Coder's SCIM 2.0 implementation is not a fully certified or guaranteed > implementation of the SCIM 2.0 specification. > It is intended to cover common user provisioning and deprovisioning flows > with the major identity providers (Okta, Microsoft Entra ID, etc.). Specific > attributes, endpoints, or behaviors required by your IdP may not be > supported, and compatibility may change between releases. If you depend on > a specific SCIM behavior, contact us before > rolling it out broadly. See > coder/coder#15830 for > tracked gaps and ongoing work.

Coder supports user provisioning and deprovisioning via SCIM 2.0 with header authentication. Upon deactivation, users are suspended and are not deleted. Configure your SCIM application with an auth key and supply it the Coder server.

CODER_SCIM_AUTH_HEADER="your-api-key"

TLS

If your OpenID Connect provider requires client TLS certificates for authentication, you can configure them like so:

CODER_TLS_CLIENT_CERT_FILE=/path/to/cert.pem
CODER_TLS_CLIENT_KEY_FILE=/path/to/key.pem