---
layout: default
navsection: installguide
title: Set up web based login
...
{% comment %}
Copyright (C) The Arvados Authors. All rights reserved.

SPDX-License-Identifier: CC-BY-SA-3.0
{% endcomment %}

Select one of the following login mechanisms for your cluster.

# If all users will authenticate with Google, "configure Google login":#google.
# If all users will authenticate with an existing LDAP service, "configure LDAP":#ldap.
# If all users will authenticate using PAM as configured on your controller node, "configure PAM":#pam.
# If you need to enable multiple authentication methods, "configure a separate single sign-on (SSO) server":#sso.

h2(#google). Google login

With this configuration, users will sign in with their Google accounts.

First, visit "Setting up Google auth.":google-auth.html

Next, enable Google login and copy the values of *Client ID* and *Client secret* from the Google Developers Console into the @Login.Google@ section of @config.yml@:

<pre>
    Login:
      Google:
        Enable: true
        ClientID: "0000000000000-zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz.apps.googleusercontent.com"
        ClientSecret: "zzzzzzzzzzzzzzzzzzzzzzzz"
</pre>

h2(#ldap). LDAP

With this configuration, authentication uses an external LDAP service like OpenLDAP or Active Directory.

Enable LDAP authentication and provide your LDAP server's host, port, and credentials (if needed to search the directory) in @config.yml@:

<pre>
    Login:
      LDAP:
        Enable: true
        URL: ldap://ldap.example.com:389
        SearchBindUser: cn=lookupuser,dc=example,dc=com
        SearchBindPassword: xxxxxxxx
        SearchBase: ou=Users,dc=example,dc=com
</pre>

The email address reported by LDAP will be used as primary key for Arvados accounts. This means *users must not be able to edit their own email addresses* in the directory.

Additional configuration settings are available:
* @StartTLS@ is enabled by default.
* @StripDomain@ and @AppendDomain@ modify the username entered by the user before searching for it in the directory.
* @SearchAttribute@ (default @uid@) is the LDAP attribute used when searching for usernames.
* @SearchFilters@ accepts LDAP filter expressions to control which users can log in.

Check the LDAP section in the "default config file":{{site.baseurl}}/admin/config.html for more details and configuration options.

h2(#pam). PAM (experimental)

With this configuration, authentication is done according to the Linux PAM ("Pluggable Authentication Modules") configuration on your controller host.

Enable PAM authentication in @config.yml@:

<pre>
    Login:
      PAM:
        Enable: true
</pre>

Check the "default config file":{{site.baseurl}}/admin/config.html for more PAM configuration options.

The default PAM configuration on most Linux systems uses the local password database in @/etc/shadow@ for all logins. In this case, in order to log in to Arvados, users must have a shell account and password on the controller host itself. This can be convenient for a single-user or test cluster.

PAM can also be configured to use different backends like LDAP. In a production environment, PAM configuration should use the service name ("arvados" by default) to set a separate policy for Arvados logins: generally, Arvados users should not have shell accounts on the controller node.

For information about configuring PAM, refer to the "PAM System Administrator's Guide":http://www.linux-pam.org/Linux-PAM-html/Linux-PAM_SAG.html.

h2(#sso). Separate single-sign-on (SSO) server

With this configuration, Arvados passes off authentication to a separate SSO server that supports Google, LDAP, and a local password database.

See "Install the Single Sign On (SSO) server":install-sso.html