diff --git a/data/hostname/bardo.internal.admin.swh.network.yaml b/data/hostname/bardo.internal.admin.swh.network.yaml
index e0e7a913..65a69dce 100644
--- a/data/hostname/bardo.internal.admin.swh.network.yaml
+++ b/data/hostname/bardo.internal.admin.swh.network.yaml
@@ -1,51 +1,61 @@
 groups:
   hedgedoc:
     gid: 6000
 
 users:
   hedgedoc:
     uid: 6000
     shell: /bin/bash
     groups:
       - hedgedoc
 
 hedgedoc::db::host: localhost
 hedgedoc::db::database: hedgedoc
 hedgedoc::db::username: hedgedoc
 # hedgedoc::db::password: in private-data
 
 swh::postgresql::version: '12'
 swh::postgresql::port: 5433
 swh::postgresql::cluster_name: "%{lookup('swh::postgresql::version')}/main"
 swh::postgresql::datadir_base: "%{lookup('swh::base_directory')}/postgres"
 swh::postgresql::datadir: "%{lookup('swh::postgresql::datadir_base')}/%{lookup('swh::postgresql::cluster_name')}"
 swh::postgresql::listen_addresses:
   - 0.0.0.0
 swh::postgresql::network_accesses:
   - 192.168.100.0/24 # Monitoring
   - 192.168.130.0/24 # Staging services
 
 postgresql::globals::version: "%{alias('swh::postgresql::version')}"
 
 postgresql::server::config_entries:
   shared_buffers: "%{alias('swh::postgresql::shared_buffers')}"
   cluster_name: "%{alias('swh::postgresql::cluster_name')}"
 
 swh::dbs:
   hedgedoc:
     name: "%{alias('hedgedoc::db::database')}"
     user: "%{alias('hedgedoc::db::username')}"
 
 hedgedoc::release::version: 1.7.1
 hedgedoc::release::digest: 17e7092430b36c96059309fdd03f9244f6a13611e28ced153d9dbf97e109d5ba
 hedgedoc::release::digest_type: sha256
 
 hedgedoc::user: hedgedoc
 hedgedoc::group: hedgedoc
 
 hedgedoc::allow_anonymous: true
 hedgedoc::allow_anonymous_edits: true
+
+# authentication
 hedgedoc::allow_email: true
-hedgedoc::allow_email_register: true
+hedgedoc::allow_email_register: false
+hedgedoc::enable_keycloak: true
+hedgedoc::keycloak::domain: auth.softwareheritage.org
+hedgedoc::keycloak::realm: SoftwareHeritage
+hedgedoc::keycloak::client::id: hedgedoc
+# hedgedoc::keycloak::client::secret in private-data
+
+
+
 hedgedoc::runtime_environment: production
 hedgedoc::log_level: debug
diff --git a/site-modules/profile/manifests/hedgedoc.pp b/site-modules/profile/manifests/hedgedoc.pp
index 51226222..cabdfa20 100644
--- a/site-modules/profile/manifests/hedgedoc.pp
+++ b/site-modules/profile/manifests/hedgedoc.pp
@@ -1,140 +1,146 @@
 # deploy a hedgedoc instance
 class profile::hedgedoc {
 
   $packages = [
     'npm', 'yarn', 'node-gyp'
   ]
 
   $keyid = lookup('yarn::apt_config::keyid')
   $key =   lookup('yarn::apt_config::key')
 
   # ---- configuration
   $user = lookup('hedgedoc::user')
   $group = lookup('hedgedoc::group')
 
   $base_url = lookup('swh::deploy::hedgedoc::base_url')
 
   $db_host = lookup('hedgedoc::db::host')
   $db_name = lookup('hedgedoc::db::database')
   $db_user = lookup('hedgedoc::db::username')
   $db_password = lookup('swh::deploy::hedgedoc::db::password')
   $db_port = lookup('swh::postgresql::port')
   $db_url = "postgres://${db_user}:${db_password}@${db_host}:${db_port}/${db_name}"
 
   $allow_anonymous = lookup('hedgedoc::allow_anonymous')
   $allow_anonymous_edits = lookup('hedgedoc::allow_anonymous_edits')
   $allow_email = lookup('hedgedoc::allow_email')
   $allow_email_register = lookup('hedgedoc::allow_email_register')
 
+  $enable_keycloak = lookup('hedgedoc::enable_keycloak', Boolean, 'first', false)
+  $keycloak_domain = lookup('hedgedoc::keycloak::domain')
+  $keycloak_realm = lookup('hedgedoc::keycloak::realm')
+  $keycloak_client_id = lookup('hedgedoc::keycloak::client::id')
+  $keycloak_client_secret = lookup('hedgedoc::keycloak::client::secret')
+
   $runtime_environment = lookup('hedgedoc::runtime_environment')
   $log_level = lookup('hedgedoc::log_level')
 
   # ---- install
   $version = lookup('hedgedoc::release::version')
   $archive_url = "https://github.com/hedgedoc/hedgedoc/releases/download/${version}/hedgedoc-${version}.tar.gz"
   $archive_digest = lookup('hedgedoc::release::digest')
   $archive_digest_type = lookup('hedgedoc::release::digest_type')
   $archive_path = "/tmp/hedgedoc-${version}.tar.gz"
   $root_install_path = "/opt"
   $install_path = "${root_install_path}/hedgedoc"
   $upgrade_flag_path = "${install_path}/hedgedoc-${version}-upgrade"
 
   $sequelizerc_config_sequelizerc_path = "${install_path}/.sequelizerc"
   $sequelizerc_config_json_path = "${install_path}/config.json"
 
   $service_name = "hedgedoc"
   $unit_name = "${service_name}.service"
 
   apt::source { 'yarn':
     location => "https://dl.yarnpkg.com/debian/",
     release  => 'stable',
     repos    => 'main',
     key      => {
       id      => $keyid,
       content => $key,
     },
   } ->
   package { $packages:
     ensure => present,
     notify => Archive['hedgedoc'],
   }
 
   file { $install_path:
     ensure  => 'directory',
     owner   => $user,
     group   => $group,
     mode    => '0644',
     require => [User[$user], Group[$group]],
   }
 
   archive { 'hedgedoc':
     path          => $archive_path,
     extract       => true,
     source        => $archive_url,
     extract_path  => $root_install_path,
     creates       => $install_path,
     checksum      => $archive_digest,
     checksum_type => $archive_digest_type,
     cleanup       => true,
     user          => 'root',
     group         => 'root',
     notify        => File[$install_path],
   } ~>
   exec {'active-initialize':
     command      => "touch ${upgrade_flag_path}",
     path         => '/usr/bin',
     refreshonly  => true,
   } ~>
   exec {'hedgedoc-flag-upgrade':
     command     => "$install_path/bin/setup",
     cwd         => $install_path,
     require     => Postgresql::Server::Db[$db_name],
     refreshonly => true,
   } ~>
   file {$sequelizerc_config_json_path:
     ensure  => present,
     owner   => $user,
     group   => $group,
     # Contains credentials
     mode    => '0600',
     content => template("profile/hedgedoc/config.json.erb"),
   } ~>
   file {$sequelizerc_config_sequelizerc_path:
     ensure  => present,
     owner   => $user,
     group   => $group,
     mode    => '0644',
     content => template("profile/hedgedoc/sequelizerc.erb"),
   } ~>
   exec {'yarn-build':
     command     => "yarn run build",
     cwd         => $install_path,
     path        => '/usr/bin',
     onlyif      => "test -f ${upgrade_flag_path}",
     refreshonly => true,
   } ~>
   exec {'hegdedoc-flag-upgrade-done':
     command     => "rm ${upgrade_flag_path}",
     cwd         => $install_path,
     path        => '/usr/bin',
     onlyif      => "test -f ${upgrade_flag_path}",
     refreshonly => true,
     notify      => Service[$service_name],
   }
 
   systemd::unit_file {$unit_name:
     ensure  => present,
     content => template('profile/hedgedoc/hedgedoc.service.erb'),
   }
 
   service {$service_name:
     ensure  => 'running',
     enable  => true,
     require => [
       Systemd::Unit_file[$unit_name],
       Package[$packages],
       Archive['hedgedoc'],
     ],
   }
 
 }
diff --git a/site-modules/profile/templates/hedgedoc/config.json.erb b/site-modules/profile/templates/hedgedoc/config.json.erb
index 70ac7df6..57e8ee22 100644
--- a/site-modules/profile/templates/hedgedoc/config.json.erb
+++ b/site-modules/profile/templates/hedgedoc/config.json.erb
@@ -1,37 +1,50 @@
 {
     "<%= @runtime_environment %>": {
         "sessionSecret": "change-this-secret",
         "allowAnonymous": <%= @allow_anonymous %>,
         "allowAnonymousEdit": <%= @allow_anonymous_edits %>,
         "allowFreeURL": true,
         "protocolUseSSL": true,
         "domain": "<%= @base_url %>",
         "loglevel": "<%= @log_level %>",
         "allowOrigin": [ "localhost", "<%= @base_url %>"],
         "email": <%= @allow_email %>,
         "allowEmailRegister": <%= @allow_email_register %>,
+<% if @enable_keycloak -%>
+        "oauth2": {
+            "baseURL": "https://<%= @keycloak_domain %>/",
+            "userProfileURL": "https://<%= @keycloak_domain %>/auth/realms/<%= @keycloak_realm %>/protocol/openid-connect/userinfo",
+            "userProfileUsernameAttr": "preferred_username",
+            "userProfileDisplayNameAttr": "name",
+            "userProfileEmailAttr": "email",
+            "tokenURL": "https://<%= @keycloak_domain %>/auth/realms/<%= @keycloak_realm %>/protocol/openid-connect/token",
+            "authorizationURL": "https://<%= @keycloak_domain %>/auth/realms/<%= @keycloak_realm %>/protocol/openid-connect/auth",
+            "clientID": "<%= @keycloak_client_id %>",
+            "clientSecret": "<%= @keycloak_client_secret %>"
+        },
+<% end -%>
         "hsts": {
             "enable": true,
             "maxAgeSeconds": 31536000,
             "includeSubdomains": true,
             "preload": true
         },
         "csp": {
             "enable": true,
             "upgradeInsecureRequests": "auto",
             "addDefaults": true,
             "addDisqus": true,
             "addGoogleAnalytics": true
         },
         "cookiePolicy": "lax",
         "db": {
             "username": "<%= @db_user %>",
             "password": "<%= @db_password %>",
             "database": "<%= @db_name %>",
             "host": "<%= @db_host %>",
             "port": "<%= @db_port %>",
             "dialect": "postgres"
         },
         "linkifyHeaderStyle": "gfm"
     }
 }