Configure an external Sidekiq instance

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You can configure an external Sidekiq instance by using the Sidekiq that’s bundled in the GitLab package. Sidekiq requires connection to the Redis, PostgreSQL, and Gitaly instances.

Configure TCP access for PostgreSQL, Gitaly, and Redis on the GitLab instance

By default, GitLab uses UNIX sockets and is not set up to communicate via TCP. To change this:

  1. Edit the /etc/gitlab/gitlab.rb file on your GitLab instance, and add the following:

    
    ## PostgreSQL
    
    # Replace POSTGRESQL_PASSWORD_HASH with a generated md5 value
    postgresql['sql_user_password'] = 'POSTGRESQL_PASSWORD_HASH'
    postgresql['listen_address'] = '0.0.0.0'
    postgresql['port'] = 5432
    
    # Add the Sidekiq nodes to PostgreSQL's trusted addresses.
    # In the following example, 10.10.1.30/32 is the private IP
    # of the Sidekiq server.
    postgresql['md5_auth_cidr_addresses'] = %w(127.0.0.1/32 10.10.1.30/32)
    postgresql['trust_auth_cidr_addresses'] = %w(127.0.0.1/32 10.10.1.30/32)
    
    ## Gitaly
    
    gitaly['configuration'] = {
       # ...
       #
       # Make Gitaly accept connections on all network interfaces
       listen_addr: '0.0.0.0:8075',
       auth: {
          ## Set up the Gitaly token as a form of authentication since you are accessing Gitaly over the network
          ## https://docs.gitlab.com/ee/administration/gitaly/configure_gitaly.html#about-the-gitaly-token
          token: 'abc123secret',
       },
    }
    
    gitaly['auth_token'] = ''
    praefect['configuration'][:auth][:token] = 'abc123secret'
    gitlab_rails['gitaly_token'] = 'abc123secret'
    
    ## Redis configuration
    
    redis['bind'] = '0.0.0.0'
    redis['port'] = 6379
    # Password to Authenticate Redis
    redis['password'] = 'redis-password-goes-here'
    gitlab_rails['redis_password'] = 'redis-password-goes-here'
    
    
  2. Run reconfigure:

    sudo gitlab-ctl reconfigure
    
  3. Restart the PostgreSQL server:

    sudo gitlab-ctl restart postgresql
    

Set up Sidekiq instance

  1. SSH into the Sidekiq server.

  2. Confirm that you can access the PostgreSQL, Gitaly, and Redis ports:

    telnet <GitLab host> 5432 # PostgreSQL
    telnet <GitLab host> 8075 # Gitaly
    telnet <GitLab host> 6379 # Redis
    
  3. Download and install the Linux package using steps 1 and 2. Do not complete any other steps.

  4. Copy the /etc/gitlab/gitlab.rb file from the GitLab instance and add the following settings. Make sure to replace them with your values:

   # https://docs.gitlab.com/omnibus/roles/#sidekiq-roles
   roles(["sidekiq_role"])

   ##
   ## To maintain uniformity of links across nodes, the
   ## `external_url` on the Sidekiq server should point to the external URL that users
   ## use to access GitLab. This can be either:
   ##
   ## - The `external_url` set on your application server.
   ## - The URL of a external load balancer, which routes traffic to the GitLab application server.
   ##
   external_url 'https://gitlab.example.com'

   # Configure the gitlab-shell API callback URL. Without this, `git push` will
   # fail. This can be your 'front door' GitLab URL or an internal load
   # balancer.
   gitlab_rails['internal_api_url'] = 'GITLAB_URL'
   gitlab_shell['secret_token'] = 'SHELL_TOKEN'

   ########################################
   ####              Redis              ###
   ########################################

   ## Must be the same in every sentinel node.
   redis['master_name'] = 'gitlab-redis' # Required if you have setup redis cluster
   ## The same password for Redis authentication you set up for the master node.
   redis['master_password'] = '<redis_master_password>'

   ### If redis is running on the main Gitlab instance and you have opened the TCP port as above add the following
   gitlab_rails['redis_host'] = '<gitlab_host>'
   gitlab_rails['redis_port'] = 6379

   #######################################
   ###              Gitaly             ###
   #######################################

   ## Replace <gitaly_token> with the one you set up, see
   ## https://docs.gitlab.com/ee/administration/gitaly/configure_gitaly.html#about-the-gitaly-token
   git_data_dirs({
     "default" => {
        "gitaly_address" => "tcp://<gitlab_host>:8075",
        "gitaly_token" => "<gitaly_token>"
     }
   })

   #######################################
   ###            Postgres             ###
   #######################################

   # Replace <database_host> and <database_password>
   gitlab_rails['db_host'] = '<database_host>'
   gitlab_rails['db_port'] = 5432
   gitlab_rails['db_password'] = '<database_password>'
   ## Prevent database migrations from running on upgrade automatically
   gitlab_rails['auto_migrate'] = false

   #######################################
   ###      Sidekiq configuration      ###
   #######################################
   sidekiq['enable'] = true
   sidekiq['listen_address'] = "0.0.0.0"

   ## Set number of Sidekiq queue processes to the same number as available CPUs
   sidekiq['queue_groups'] = ['*'] * 4

   ## Set number of Sidekiq threads per queue process to the recommend number of 20
   sidekiq['max_concurrency'] = 20
  1. Copy the /etc/gitlab/gitlab-secrets.json file from the GitLab instance and replace the file in the Sidekiq instance.

  2. Reconfigure GitLab:

    sudo gitlab-ctl reconfigure
    
  3. Restart the Sidekiq instance after completing the process and finishing the database migrations.

Configure multiple Sidekiq nodes with shared storage

If you run multiple Sidekiq nodes with a shared file storage, such as NFS, you must specify the UIDs and GIDs to ensure they match between servers. Specifying the UIDs and GIDs prevents permissions issues in the file system. This advice is similar to the advice for Geo setups.

To set up multiple Sidekiq nodes:

  1. Edit /etc/gitlab/gitlab.rb:

    user['uid'] = 9000
    user['gid'] = 9000
    web_server['uid'] = 9001
    web_server['gid'] = 9001
    registry['uid'] = 9002
    registry['gid'] = 9002
    
  2. Reconfigure GitLab:

    sudo gitlab-ctl reconfigure
    

Configure the container registry when using an external Sidekiq

If you’re using the container registry and it’s running on a different node than Sidekiq, follow the steps below.

  1. Edit /etc/gitlab/gitlab.rb, and configure the registry URL:

    gitlab_rails['registry_api_url'] = "https://registry.example.com"
    
  2. Reconfigure GitLab:

    sudo gitlab-ctl reconfigure
    
  3. In the instance where container registry is hosted, copy the registry.key file to the Sidekiq node.

Configure the Sidekiq metrics server

If you want to collect Sidekiq metrics, enable the Sidekiq metrics server. To make metrics available from localhost:8082/metrics:

To configure the metrics server:

  1. Edit /etc/gitlab/gitlab.rb:

    sidekiq['metrics_enabled'] = true
    sidekiq['listen_address'] = "localhost"
    sidekiq['listen_port'] = 8082
    
    # Optionally log all the metrics server logs to log/sidekiq_exporter.log
    sidekiq['exporter_log_enabled'] = true
    
  2. Reconfigure GitLab:

    sudo gitlab-ctl reconfigure
    

Enable HTTPS

History

To serve metrics via HTTPS instead of HTTP, enable TLS in the exporter settings:

  1. Edit /etc/gitlab/gitlab.rb to add (or find and uncomment) the following lines:

    sidekiq['exporter_tls_enabled'] = true
    sidekiq['exporter_tls_cert_path'] = "/path/to/certificate.pem"
    sidekiq['exporter_tls_key_path'] = "/path/to/private-key.pem"
    
  2. Save the file and reconfigure GitLab for the changes to take effect.

When TLS is enabled, the same port and address are used as described above. The metrics server cannot serve both HTTP and HTTPS at the same time.

Configure health checks

If you use health check probes to observe Sidekiq, enable the Sidekiq health check server. To make health checks available from localhost:8092:

  1. Edit /etc/gitlab/gitlab.rb:

    sidekiq['health_checks_enabled'] = true
    sidekiq['health_checks_listen_address'] = "localhost"
    sidekiq['health_checks_listen_port'] = 8092
    
  2. Reconfigure GitLab:

    sudo gitlab-ctl reconfigure
    

For more information about health checks, see the Sidekiq health check page.

Configure LDAP and user or group synchronization

If you use LDAP for user and group management, you must add the LDAP configuration to your Sidekiq node as well as the LDAP synchronization worker. If the LDAP configuration and LDAP synchronization worker are not applied to your Sidekiq node, users and groups are not automatically synchronized.

For more information about configuring LDAP for GitLab, see:

To enable LDAP with the synchronization worker for Sidekiq:

  1. Edit /etc/gitlab/gitlab.rb:

    gitlab_rails['ldap_enabled'] = true
    gitlab_rails['prevent_ldap_sign_in'] = false
    gitlab_rails['ldap_servers'] = {
    'main' => {
    'label' => 'LDAP',
    'host' => 'ldap.mydomain.com',
    'port' => 389,
    'uid' => 'sAMAccountName',
    'encryption' => 'simple_tls',
    'verify_certificates' => true,
    'bind_dn' => '_the_full_dn_of_the_user_you_will_bind_with',
    'password' => '_the_password_of_the_bind_user',
    'tls_options' => {
       'ca_file' => '',
       'ssl_version' => '',
       'ciphers' => '',
       'cert' => '',
       'key' => ''
    },
    'timeout' => 10,
    'active_directory' => true,
    'allow_username_or_email_login' => false,
    'block_auto_created_users' => false,
    'base' => 'dc=example,dc=com',
    'user_filter' => '',
    'attributes' => {
       'username' => ['uid', 'userid', 'sAMAccountName'],
       'email' => ['mail', 'email', 'userPrincipalName'],
       'name' => 'cn',
       'first_name' => 'givenName',
       'last_name' => 'sn'
    },
    'lowercase_usernames' => false,
    
    # Enterprise Edition only
    # https://docs.gitlab.com/ee/administration/auth/ldap/ldap_synchronization.html
    'group_base' => '',
    'admin_group' => '',
    'external_groups' => [],
    'sync_ssh_keys' => false
    }
    }
    gitlab_rails['ldap_sync_worker_cron'] = "0 */12 * * *"
    
  2. Reconfigure GitLab:

    sudo gitlab-ctl reconfigure
    

Configure SAML Groups for SAML Group Sync

If you use SAML Group Sync, you must configure SAML Groups on all your Sidekiq nodes.

Troubleshooting

See our administrator guide to troubleshooting Sidekiq.