Deploying a node

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 Creating nodes locally or are deploying a third-party CorDapp.

Linux: Installing and running Corda as a system service

We recommend creating system services to run a node and the optional webserver. This provides logging and service handling, and ensures the Corda service is run at boot.

Prerequisites:

  1. 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. Place the Enterprise Corda JAR corda-VERSION_NUMBER.jar in /opt/corda

  4. (Optional) Copy the Corda webserver JAR provided to your organization (under /corda-webserver-VERSION_NUMBER.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 to the cordapps directory

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

    basedir : "/opt/corda"
    p2pAddress : "example.com:10002"
    rpcAddress : "example.com:10003"
    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
            ]
        }
    ]
    
  7. Make the following changes to /opt/corda/node.conf:

    • Change the p2pAddress and rpcAddress values to start with your server’s hostname or external IP address. This is the address 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. This will be used during the issuance of your certificate and should rarely change as it should represent the legal identity of your node
      • Organization (O=) should be a unique and meaningful identifier (e.g. Bank of Breakfast Tea)
      • Location (L=) is your nearest city
      • Country (C=) is the ISO 3166-1 alpha-2 code
    • Change the RPC username and password

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.

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

    [Unit]
    Description=Corda Node - Bank of Breakfast Tea
    Requires=network.target
    
    [Service]
    Type=simple
    User=corda
    WorkingDirectory=/opt/corda
    ExecStart=/usr/bin/java -Xmx2048m -jar /opt/corda/corda.jar
    Restart=on-failure
    
    [Install]
    WantedBy=multi-user.target
    
  1. Upstart: Create a corda.conf file based on the example below and save it in the /etc/init/ directory

    description "Corda Node - Bank of Breakfast Tea"
    
    start on runlevel [2345]
    stop on runlevel [!2345]
    
    respawn
    setuid corda
    chdir /opt/corda
    exec java -Xmx2048m -jar /opt/corda/corda.jar
    
  2. 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

    • Set the maximum amount of memory available to the Corda process by changing the -Xmx2048m parameter

    • 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 webserver provides a simple interface for interacting with your installed CorDapps in a browser. Running the webserver is optional.

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

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

    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
    
  2. Provision the required certificates to your node. Contact the network permissioning service or see Network permissioning

  3. Depending on the versions of Corda and of the CorDapps used, database migration scripts might need to run before a node is able to start. For more information refer to Database management

  4. 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
  1. 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:

  1. Create a Corda directory and copy the Enterprise Corda JAR corda-VERSION_NUMBER.jar. Replace VERSION_NUMBER with the desired version. Here’s an example using PowerShell:

    mkdir C:\Corda
    copy PATH_TO_CORDA_JAR/corda-VERSION_NUMBER.jar 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 to the cordapps directory

  3. Save the below as C:\Corda\node.conf. See Node configuration for a description of these options:

    basedir : "C:\\Corda"
    p2pAddress : "example.com:10002"
    rpcAddress : "example.com:10003"
    h2port : 11000
    emailAddress: "you@example.com"
    myLegalName : "O=Bank of Breakfast Tea, L=London, C=GB"
    keyStorePassword : "cordacadevpass"
    trustStorePassword : "trustpass"
    extraAdvertisedServiceIds: [ "" ]
    devMode : false
    rpcUsers=[
        {
            user=corda
            password=portal_password
            permissions=[
                ALL
            ]
        }
    ]
    
  4. Make the following changes to C:\Corda\node.conf:

    • Change the p2pAddress and rpcAddress values to start with your server’s hostname or external IP address. This is the address 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. This will be used during the issuance of your certificate and should rarely change as it should represent the legal identity of your node
      • Organization (O=) should be a unique and meaningful identifier (e.g. Bank of Breakfast Tea)
      • Location (L=) is your nearest city
      • Country (C=) is the ISO 3166-1 alpha-2 code
    • Change the RPC username and password
  5. Copy the required Java keystores to the node. See Network permissioning

  6. Download the NSSM service manager

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

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

    nssm install cordanode1 C:\ProgramData\Oracle\Java\javapath\java.exe
    nssm set cordanode1 AppDirectory C:\Corda
    nssm set cordanode1 AppParameters "-Xmx2048m -jar corda.jar --config-file=C:\corda\node.conf"
    nssm set cordanode1 AppStdout C:\Corda\service.log
    nssm set cordanode1 AppStderr C:\Corda\service.log
    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) for each node
    • Set the amount of Java heap memory available to this node by modifying the -Xmx argument
    • Set an informative description
  10. Provision the required certificates to your node. Contact the network permissioning service or see Network permissioning

  11. Depending on the versions of Corda and of the CorDapps used, database migration scripts might need to run before a node is able to start. For more information refer to Database management

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

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

  14. 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.