Deploying a node to a server
============================

.. contents::

.. note:: These instructions are intended for people who want to deploy a Corda node to a server,
   whether they have developed and tested a CorDapp following the instructions in :doc:`generating-a-node`
   or are deploying a third-party CorDapp.

.. note:: When deploying multiple nodes in parallel the package tool (Capsule) that Corda uses can encounter
   issues retrieving dependencies. This is due to each node trying to download the dependencies in a common
   location.  In these cases it is recommended to set the environment variable ``CAPSULE_CACHE_DIR`` which
   will allow the Capsule to maintain a separate cache for each node.  This is used in the example descriptions
   below. See the `Capsule documentation <http://www.capsule.io>`_ for more details.

Linux: Installing and running Corda as a system service
-------------------------------------------------------
We recommend creating system services to run a node and the optional test webserver. This provides logging and service
handling, and ensures the Corda service is run at boot.

**Prerequisites**:

   * A supported Java distribution. The supported versions are listed in :doc:`getting-set-up`

1. As root/sys admin user - add a system user which will be used to run Corda:

    ``sudo adduser --system --no-create-home --group corda``


2. Create a directory called ``/opt/corda`` and change its ownership to the user you want to use to run Corda:

   ``mkdir /opt/corda; chown corda:corda /opt/corda``

3. Download the `Corda jar <https://r3.bintray.com/corda/net/corda/corda/>`_
   (under ``/|corda_version|/corda-|corda_version|.jar``) and place it in ``/opt/corda``

4. (Optional) Download the `Corda webserver jar <http://r3.bintray.com/corda/net/corda/corda-webserver/>`_
   (under ``/|corda_version|/corda-|corda_version|.jar``) and place it in ``/opt/corda``

5. Create a directory called ``cordapps`` in ``/opt/corda`` and save your CorDapp jar file to it. Alternatively, download one of
   our `sample CorDapps <https://www.corda.net/samples/>`_ to the ``cordapps`` directory

6. Save the below as ``/opt/corda/node.conf``. See :doc:`corda-configuration-file` for a description of these options:

.. code-block:: none

      p2pAddress = "example.com:10002"
      rpcSettings {
          address: "example.com:10003"
          adminAddress: "example.com:10004"
      }
      h2port = 11000
      emailAddress = "you@example.com"
      myLegalName = "O=Bank of Breakfast Tea, L=London, C=GB"
      keyStorePassword = "cordacadevpass"
      trustStorePassword = "trustpass"
      devMode = false
      rpcUsers= [
          {
              user=corda
              password=portal_password
              permissions=[
                  ALL
              ]
          }
      ]
      custom { jvmArgs = [ "-Xmx2048m", "-XX:+UseG1GC" ] }

7. Make the following changes to ``/opt/corda/node.conf``:

   *  Change the ``p2pAddress``, ``rpcSettings.address`` and ``rpcSettings.adminAddress`` values to match
      your server's hostname or external IP address. These are the addresses other nodes or RPC interfaces will use to
      communicate with your node.
   *  Change the ports if necessary, for example if you are running multiple nodes on one server (see below).
   *  Enter an email address which will be used as an administrative contact during the registration process. This is
      only visible to the permissioning service.
   *  Enter your node's desired legal name (see :ref:`node-naming` for more details).
   *  If required, add RPC users

.. note:: Ubuntu 16.04 and most current Linux distributions use SystemD, so if you are running one of these
          distributions follow the steps marked **SystemD**. 
          If you are running Ubuntu 14.04, follow the instructions for **Upstart**.

8. **SystemD**: Create a ``corda.service`` file based on the example below and save it in the ``/etc/systemd/system/``
   directory

    .. code-block:: shell

       [Unit]
       Description=Corda Node - Bank of Breakfast Tea
       Requires=network.target

       [Service]
       Type=simple
       User=corda
       WorkingDirectory=/opt/corda
       ExecStart=/usr/bin/java -jar /opt/corda/corda.jar
       Restart=on-failure
       Environment="CAPSULE_CACHE_DIR=./capsule"

       [Install]
       WantedBy=multi-user.target

8. **Upstart**: Create a ``corda.conf`` file based on the example below and save it in the ``/etc/init/`` directory

    .. code-block:: shell

        description "Corda Node - Bank of Breakfast Tea"

        start on runlevel [2345]
        stop on runlevel [!2345]

        respawn
        setuid corda
        chdir /opt/corda
        exec java -jar /opt/corda/corda.jar

9. Make the following changes to ``corda.service`` or ``corda.conf``:

    * Make sure the service description is informative - particularly if you plan to run multiple nodes.
    * Change the username to the user account you want to use to run Corda. **We recommend that this user account is
      not root**
    * **SystemD**: Make sure the ``corda.service`` file is owned by root with the correct permissions:

        * ``sudo chown root:root /etc/systemd/system/corda.service``
        * ``sudo chmod 644 /etc/systemd/system/corda.service``

    * **Upstart**: Make sure the ``corda.conf`` file is owned by root with the correct permissions:

        * ``sudo chown root:root /etc/init/corda.conf``
        * ``sudo chmod 644 /etc/init/corda.conf``

.. note:: The Corda test webserver provides a simple interface for interacting with your installed CorDapps in a browser.
   Running the webserver is optional.

10. **SystemD**: Create a ``corda-webserver.service`` file based on the example below and save it in the ``/etc/systemd/system/``
    directory

    .. code-block:: shell

       [Unit]
       Description=Webserver for Corda Node - Bank of Breakfast Tea
       Requires=network.target

       [Service]
       Type=simple
       User=corda
       WorkingDirectory=/opt/corda
       ExecStart=/usr/bin/java -jar /opt/corda/corda-webserver.jar
       Restart=on-failure

       [Install]
       WantedBy=multi-user.target

10. **Upstart**: Create a ``corda-webserver.conf`` file based on the example below and save it in the ``/etc/init/``
    directory

    .. code-block:: shell

        description "Webserver for Corda Node - Bank of Breakfast Tea"

        start on runlevel [2345]
        stop on runlevel [!2345]

        respawn
        setuid corda
        chdir /opt/corda
        exec java -jar /opt/corda/corda-webserver.jar

11. Provision the required certificates to your node. Contact the network permissioning service or see
    :doc:`permissioning`

12. **SystemD**: You can now start a node and its webserver and set the services to start on boot by running the
    following ``systemctl`` commands:

   * ``sudo systemctl daemon-reload``
   * ``sudo systemctl enable --now corda``
   * ``sudo systemctl enable --now corda-webserver``

12. **Upstart**: You can now start a node and its webserver by running the following commands:

   * ``sudo start corda``
   * ``sudo start corda-webserver``

The Upstart configuration files created above tell Upstart to start the Corda services on boot so there is no need to explicitly enable them.

You can run multiple nodes by creating multiple directories and Corda services, modifying the ``node.conf`` and
SystemD or Upstart configuration files so they are unique.

Windows: Installing and running Corda as a Windows service
----------------------------------------------------------
We recommend running Corda as a Windows service. This provides service handling, ensures the Corda service is run
at boot, and means the Corda service stays running with no users connected to the server.

**Prerequisites**:

   * A supported Java distribution. The supported versions are listed in :doc:`getting-set-up`

1. Create a Corda directory and download the Corda jar. Here's an
   example using PowerShell:

.. code-block:: shell

        mkdir C:\Corda
        wget http://jcenter.bintray.com/net/corda/corda/|corda_version|/corda-|corda_version|.jar -OutFile C:\Corda\corda.jar

2. Create a directory called ``cordapps`` in ``C:\Corda\`` and save your CorDapp jar file to it. Alternatively,
   download one of our `sample CorDapps <https://www.corda.net/samples/>`_ to the ``cordapps`` directory

3. Save the below as ``C:\Corda\node.conf``. See :doc:`corda-configuration-file` for a description of these options:

.. code-block:: none

        p2pAddress = "example.com:10002"
        rpcSettings {
            address = "example.com:10003"
            adminAddress = "example.com:10004"
        }
        h2port = 11000
        emailAddress = "you@example.com"
        myLegalName = "O=Bank of Breakfast Tea, L=London, C=GB"
        keyStorePassword = "cordacadevpass"
        trustStorePassword = "trustpass"
        devMode = false
        rpcSettings {
           useSsl = false
           standAloneBroker = false
           address = "example.com:10003"
           adminAddress = "example.com:10004"
       }
       custom { jvmArgs = [ '-Xmx2048m', '-XX:+UseG1GC' ] }

4. Make the following changes to ``C:\Corda\node.conf``:

   *  Change the ``p2pAddress``, ``rpcSettings.address`` and ``rpcSettings.adminAddress`` values to match
      your server's hostname or external IP address. These are the addresses other nodes or RPC interfaces will use to
      communicate with your node.
   *  Change the ports if necessary, for example if you are running multiple nodes on one server (see below).
   *  Enter an email address which will be used as an administrative contact during the registration process. This is
      only visible to the permissioning service.
   *  Enter your node's desired legal name (see :ref:`node-naming` for more details).
   *  If required, add RPC users

5. Copy the required Java keystores to the node. See :doc:`permissioning`

6. Download the `NSSM service manager <https://nssm.cc/>`_

7. Unzip ``nssm-2.24\win64\nssm.exe`` to ``C:\Corda``

8. Save the following as ``C:\Corda\nssm.bat``:

   .. code-block:: batch

      nssm install cordanode1 java.exe
      nssm set cordanode1 AppParameters "-jar corda.jar"
      nssm set cordanode1 AppDirectory C:\Corda
      nssm set cordanode1 AppStdout C:\Corda\service.log
      nssm set cordanode1 AppStderr C:\Corda\service.log
      nssm set cordanode1 AppEnvironmentExtra CAPSULE_CACHE_DIR=./capsule
      nssm set cordanode1 Description Corda Node - Bank of Breakfast Tea
      nssm set cordanode1 Start SERVICE_AUTO_START
      sc start cordanode1

9. Modify the batch file:

    * If you are installing multiple nodes, use a different service name (``cordanode1``), and modify
      `AppDirectory`, `AppStdout` and `AppStderr` for each node accordingly
    * Set an informative description

10. Provision the required certificates to your node. Contact the network permissioning service or see
    :doc:`permissioning`

11. Run the batch file by clicking on it or from a command prompt

12. Run ``services.msc`` and verify that a service called ``cordanode1`` is present and running

13. Run ``netstat -ano`` and check for the ports you configured in ``node.conf``

    * You may need to open the ports on the Windows firewall

Testing your installation
-------------------------
You can verify Corda is running by connecting to your RPC port from another host, e.g.:

        ``telnet your-hostname.example.com 10002``

If you receive the message "Escape character is ^]", Corda is running and accessible. Press Ctrl-] and Ctrl-D to exit
telnet.
