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471 lines
19 KiB
ReStructuredText
471 lines
19 KiB
ReStructuredText
Creating nodes locally
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======================
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.. contents::
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Handcrafting a node
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-------------------
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A node can be created manually by creating a folder that contains the following items:
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* The Corda JAR, downloaded from https://r3.bintray.com/corda/net/corda/corda/ (under /|corda_version|/corda-|corda_version|.jar)
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* A node configuration file entitled ``node.conf``, configured as per :doc:`corda-configuration-file`
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* A folder entitled ``cordapps`` containing any CorDapp JARs you want the node to load
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* An up-to-date version of the ``network-parameters`` file ([see docs:](https://docs.corda.net/network-map.html#network-parameters)) generated by the bootstrapper tool
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* **Optional:** A webserver JAR entitled ``corda-webserver-|corda_version|.jar`` that will connect to the node via RPC
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* The (deprecated) default webserver is available to you for testing and should not be used in a production environment.
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* A Spring Boot alternative can be found here: https://github.com/corda/spring-webserver
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The remaining files and folders described in :doc:`node-structure` will be generated at runtime.
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The Cordform task
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-----------------
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Corda provides a gradle plugin called ``Cordform`` that allows you to automatically generate and configure a set of
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nodes for testing and demos. Here is an example ``Cordform`` task called ``deployNodes`` that creates three nodes, defined
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in the `Kotlin CorDapp Template <https://github.com/corda/cordapp-template-kotlin/blob/release-V|platform_version|/build.gradle#L95>`_:
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.. sourcecode:: groovy
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task deployNodes(type: net.corda.plugins.Cordform, dependsOn: ['jar']) {
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directory "./build/nodes"
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node {
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name "O=Notary,L=London,C=GB"
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// The notary will offer a validating notary service.
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notary = [validating : true]
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p2pPort 10002
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rpcSettings {
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port 10003
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adminPort 10023
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}
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// No webport property, so no webserver will be created.
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h2Port 10004
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// Starts an internal SSH server providing a management shell on the node.
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sshdPort 2223
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// Includes the corda-finance CorDapp on our node.
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cordapps = ["$corda_release_distribution:corda-finance:$corda_release_version"]
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extraConfig = [
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// Setting the JMX reporter type.
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jmxReporterType: 'JOLOKIA',
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// Setting the H2 address.
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h2Settings: [ address: 'localhost:10030' ]
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]
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}
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node {
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name "O=PartyA,L=London,C=GB"
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p2pPort 10005
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rpcSettings {
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port 10006
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adminPort 10026
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}
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webPort 10007
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h2Port 10008
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cordapps = ["$corda_release_distribution:corda-finance:$corda_release_version"]
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// Grants user1 all RPC permissions.
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rpcUsers = [[ user: "user1", "password": "test", "permissions": ["ALL"]]]
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}
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node {
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name "O=PartyB,L=New York,C=US"
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p2pPort 10009
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rpcSettings {
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port 10010
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adminPort 10030
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}
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webPort 10011
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h2Port 10012
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cordapps = ["$corda_release_distribution:corda-finance:$corda_release_version"]
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// Grants user1 the ability to start the MyFlow flow.
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rpcUsers = [[ user: "user1", "password": "test", "permissions": ["StartFlow.net.corda.flows.MyFlow"]]]
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}
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}
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Running this task will create three nodes in the ``build/nodes`` folder:
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* A ``Notary`` node that:
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* Offers a validating notary service
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* Will not have a webserver (since ``webPort`` is not defined)
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* Is running the ``corda-finance`` CorDapp
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* ``PartyA`` and ``PartyB`` nodes that:
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* Are not offering any services
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* Will have a webserver (since ``webPort`` is defined)
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* Are running the ``corda-finance`` CorDapp
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* Have an RPC user, ``user1``, that can be used to log into the node via RPC
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Additionally, all three nodes will include any CorDapps defined in the project's source folders, even though these
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CorDapps are not listed in each node's ``cordapps`` entry. This means that running the ``deployNodes`` task from the
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template CorDapp, for example, would automatically build and add the template CorDapp to each node.
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The configuration values available in ``deployNodes`` task are as follows:
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Required configuration
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^^^^^^^^^^^^^^^^^^^^^^
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* ``name`` <string>
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* The legal identity name of the Corda node. (see :ref:`myLegalName <corda_configuration_file_myLegalName>`)
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* e.g.
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::
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name "O=PartyA,L=London,C=GB"
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* ``p2pAddress`` <string> <**required if p2pPort not specified**>
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* The address/port the node uses for inbound communication from other nodes. (see :ref:`p2pAddress <corda_configuration_file_p2pAddress>`)
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* e.g.
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::
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p2pAddress "example.com:10002"
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* ``p2pPort`` <integer>
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* The port the node uses for inbound communication from other nodes. Assumes the address is ``localhost``. (see :ref:`p2pAddress <corda_configuration_file_p2pAddress>`)
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* e.g.
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::
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p2pPort 10006 // "localhost:10006"
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* ``rpcSettings`` <config>
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* Specifies RPC settings for the node. (see :ref:`rpcSettings <corda_configuration_file_rpc_settings>`)
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* e.g.
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::
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rpcSettings {
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port 10006
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adminPort 10026
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}
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Optional configuration
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^^^^^^^^^^^^^^^^^^^^^^
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* ``notary`` <config> (see :ref:`notary <corda_configuration_file_notary>`)
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* Optional configuration which specifies the node is a notary.
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* .. note:: <**required**> for notary nodes
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* ``devMode`` <boolean>
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* When true enables development mode. (see :ref:`devMode <corda_configuration_file_dev_mode>`)
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* e.g.
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::
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devMode true
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* ``webAddress`` <string>
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* Configure a webserver to connect to the node via RPC. This will specify the address and port it will listen on. The node must have an RPC address configured. (see :ref:`Specifying a custom webserver<specify-custom-webserver>`)
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* e.g.
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::
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webAddress "example.com:10011"
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* ``webPort`` <integer>
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* Configure a webserver to connect to the node via RPC. Defaults the address to `localhost`. The node must have an RPC address configured. (see :ref:`Specifying a custom webserver<specify-custom-webserver>`)
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* e.g.
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::
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webPort 10011 // "localhost:10011"
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* ``rpcUsers`` <list>
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* Set the RPC users for this node. (see :ref:`rpcUsers <corda_configuration_file_rpc_users>`)
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* e.g.
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::
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rpcUsers = [[ user: "user1", "password": "test", "permissions": ["StartFlow.net.corda.flows.MyFlow"]]]
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* This configuration block allows arbitrary configuration. Incorrect configurations will not cause a DSL error.
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* ``configFile`` <string>
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* For extending configuration of nodes. (see :ref:`extended node configuration <generating_a_node_extended_config>`)
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* e.g.
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::
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configFile = "samples/trader-demo/src/main/resources/node-b.conf"
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* ``https`` <boolean>
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* When true enables HTTPS communication from the node webserver.
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* e.g.
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::
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https true
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* ``sshdPort`` <integer>
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* Specifies the port for sshd communication. (see :ref:`sshd <corda_configuration_file_sshd>`)
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* e.g.
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::
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sshd {
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port = 2222
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}
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You can extend the task ``deployNodes`` with more ``node {}`` blocks to generate as many nodes as necessary for your application.
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.. warning:: When adding nodes, make sure that there are no port clashes!
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.. _generating_a_node_extended_config:
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To extend node configuration beyond the properties defined in the ``deployNodes`` task use the ``configFile`` property with the path (relative or absolute) set to an additional configuration file.
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This file should follow the standard :doc:`corda-configuration-file` format, as per node.conf. The properties from this file will be appended to the generated node configuration. Note, if you add a property already created by the 'deployNodes' task, both properties will be present in the file.
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The path to the file can also be added while running the Gradle task via the ``-PconfigFile`` command line option. However, the same file will be applied to all nodes.
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Following the previous example ``PartyB`` node will have additional configuration options added from a file ``none-b.conf``:
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.. sourcecode:: groovy
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task deployNodes(type: net.corda.plugins.Cordform, dependsOn: ['jar']) {
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[...]
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node {
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name "O=PartyB,L=New York,C=US"
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[...]
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// Grants user1 the ability to start the MyFlow flow.
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rpcUsers = [[ user: "user1", "password": "test", "permissions": ["StartFlow.net.corda.flows.MyFlow"]]]
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configFile = "samples/trader-demo/src/main/resources/node-b.conf"
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}
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}
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Cordform parameter `drivers` of the `node` entry lists paths of the files to be copied to the `./drivers` subdirectory of the node.
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To copy the same file to all nodes `ext.drivers` can be defined in the top level and reused for each node via `drivers=ext.drivers``.
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.. sourcecode:: groovy
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task deployNodes(type: net.corda.plugins.Cordform, dependsOn: ['jar']) {
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ext.drivers = ['lib/my_common_jar.jar']
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[...]
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node {
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name "O=PartyB,L=New York,C=US"
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[...]
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drivers = ext.drivers + ['lib/my_specific_jar.jar']
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}
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}
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.. _node_package_namespace_ownership:
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Package namespace ownership
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^^^^^^^^^^^^^^^^^^^^^^^^^^^
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To specify :doc:`design/data-model-upgrades/package-namespace-ownership` configuration, the optional ``networkParameterOverrides`` and ``packageOwnership`` blocks can be used, similar to the configuration file used in :doc:`network-bootstrapper`:
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.. sourcecode:: groovy
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task deployNodes(type: net.corda.plugins.Cordform, dependsOn: ['jar']) {
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[...]
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networkParameterOverrides {
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packageOwnership {
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"com.mypackagename" {
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keystore = "_teststore"
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keystorePassword = "MyStorePassword"
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keystoreAlias = "MyKeyAlias"
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}
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}
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}
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[...]
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}
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Signing CorDapp JARs
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^^^^^^^^^^^^^^^^^^^^
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The default behaviour of Cordform is to deploy CorDapp JARs "as built":
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- prior to Corda 4 all CorDapp JARs were unsigned.
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- as of Corda 4, CorDapp JARs created by the Gradle *cordapp* plugin are signed by a Corda development certificate by default.
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The Cordform ``signing`` entry can be used to override and customise the signing of CorDapp JARs.
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Signing the CorDapp enables its contract classes to use signature constraints instead of other types of the constraints :doc:`api-contract-constraints`.
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The sign task may use an external keystore, or create a new one.
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The ``signing`` entry may contain the following parameters:
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* ``enabled`` the control flag to enable signing process, by default is set to ``false``, set to ``true`` to enable signing
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* ``all`` if set to ``true`` (by default) all CorDapps inside *cordapp* subdirectory will be signed, otherwise if ``false`` then only the generated Cordapp will be signed
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* ``options`` any relevant parameters of `SignJar ANT task <https://ant.apache.org/manual/Tasks/signjar.html>`_ and `GenKey ANT task <https://ant.apache.org/manual/Tasks/genkey.html>`_,
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by default the JAR file is signed by Corda development key, the external keystore can be specified,
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the minimal list of required options is shown below, for other options referer to `SignJar task <https://ant.apache.org/manual/Tasks/signjar.html>`_:
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* ``keystore`` the path to the keystore file, by default *cordadevcakeys.jks* keystore is shipped with the plugin
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* ``alias`` the alias to sign under, the default value is *cordaintermediateca*
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* ``storepass`` the keystore password, the default value is *cordacadevpass*
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* ``keypass`` the private key password if it's different than the password for the keystore, the default value is *cordacadevkeypass*
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* ``storetype`` the keystore type, the default value is *JKS*
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* ``dname`` the distinguished name for entity, the option is used when ``generateKeystore true`` only
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* ``keyalg`` the method to use when generating name-value pair, the value defaults to *RSA* as Corda doesn't support *DSA*, the option is used when ``generateKeystore true`` only
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* ``generateKeystore`` the flag to generate a keystore, it is set to ``false`` by default. If set to ``true`` then ad hock keystore is created and its key isused
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instead of the default Corda development key or any external key.
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The same ``options`` to specify an external keystore are used to define the newly created keystore. Additionally
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``dname`` and ``keyalg`` are required. Other options are described in `GenKey task <https://ant.apache.org/manual/Tasks/genkey.html>`_.
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If the existing keystore is already present the task will reuse it, however if the file is inside the *build* directory,
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then it will be deleted when Gradle *clean* task is run.
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The example below shows the minimal set of ``options`` needed to create a dummy keystore:
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.. sourcecode:: groovy
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task deployNodes(type: net.corda.plugins.Cordform, dependsOn: ['jar']) {
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signing {
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enabled true
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generateKeystore true
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all false
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options {
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keystore "./build/nodes/jarSignKeystore.p12"
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alias "cordapp-signer"
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storepass "secret1!"
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storetype "PKCS12"
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dname "OU=Dummy Cordapp Distributor, O=Corda, L=London, C=GB"
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keyalg "RSA"
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}
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}
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//...
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Contracts classes from signed CorDapp JARs will be checked by signature constraints by default.
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You can force them to be checked by zone constraints by adding contract class names to ``includeWhitelist`` entry,
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the list will generate *include_whitelist.txt* file used internally by :doc:`network-bootstrapper` tool.
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Refer to :doc:`api-contract-constraints` to understand implication of different constraint types before adding ``includeWhitelist`` to ``deployNodes`` task.
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The snippet below configures contracts classes from Finance CorDapp to be verified using zone constraints instead of signature constraints:
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.. sourcecode:: groovy
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task deployNodes(type: net.corda.plugins.Cordform, dependsOn: ['jar']) {
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includeWhitelist = [ "net.corda.finance.contracts.asset.Cash", "net.corda.finance.contracts.asset.CommercialPaper" ]
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//...
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.. _specify-custom-webserver:
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Specifying a custom webserver
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^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
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By default, any node listing a web port will use the default development webserver, which is not production-ready. You
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can use your own webserver JAR instead by using the ``webserverJar`` argument in a ``Cordform`` ``node`` configuration
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block:
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.. sourcecode:: groovy
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node {
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name "O=PartyA,L=New York,C=US"
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webPort 10005
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webserverJar "lib/my_webserver.jar"
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}
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The webserver JAR will be copied into the node's ``build`` folder with the name ``corda-webserver.jar``.
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.. warning:: This is an experimental feature. There is currently no support for reading the webserver's port from the
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node's ``node.conf`` file.
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The Dockerform task
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-------------------
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The ``Dockerform`` is a sister task of ``Cordform`` that provides an extra file allowing you to easily spin up nodes using ``docker-compose``. It supports the following configuration options for each node:
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* ``name``
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* ``notary``
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* ``cordapps``
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* ``rpcUsers``
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* ``useTestClock``
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The nodes' webservers will not be started. Instead, you should interact with each node via its shell over SSH
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(see the :doc:`node configuration options <corda-configuration-file>`). You have to enable the shell by adding the
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following line to each node's ``node.conf`` file:
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``sshd { port = <NUMBER> }``
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Where ``<NUMBER>`` is the port you want to open to SSH into the shell.
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To run the Dockerform task, follow these steps:
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1. Run ``./gradlew deployNodes`` to generate the node files and folder structure.
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2. Open the ``build.gradle`` file and add a new ``dockerform`` task after the existing ``deployNodes`` task:
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.. sourcecode:: groovy
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task prepareDockerNodes(type: net.corda.plugins.Dockerform, dependsOn: ['jar']) {
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nodeDefaults {
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cordapp project(":contracts-java")
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}
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node {
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name "O=Notary,L=London,C=GB"
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notary = [validating : false]
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p2pPort 10002
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rpcSettings {
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address("localhost:10003")
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adminAddress("localhost:10023")
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}
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projectCordapp {
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deploy = false
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}
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cordapps.clear()
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}
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node {
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name "O=PartyA,L=London,C=GB"
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p2pPort 10002
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rpcSettings {
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address("localhost:10003")
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adminAddress("localhost:10023")
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}
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rpcUsers = [[user: "user1", "password": "test", "permissions": ["ALL"]]]
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}
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node {
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name "O=PartyB,L=New York,C=US"
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p2pPort 10002
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rpcSettings {
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address("localhost:10003")
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adminAddress("localhost:10023")
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}
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rpcUsers = [[user: "user1", "password": "test", "permissions": ["ALL"]]]
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}
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}
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3. Create an empty ``docker-compose.yml`` file using the following command on Mac or Linux:
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``touch workflows-java/build/nodes/docker-compose.yml``
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For Windows, use the following command:
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``echo.> workflows-java\build\nodes\docker-compose.yml``
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4. Run ``./gradlew prepareDockerNodes`` and edit the generated ``docker-compose.yml`` file to change the ports:
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.. sourcecode:: groovy
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version: '3'
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services:
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notary:
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build: /Users/<USER>/Projects/json-cordapp/workflows-java/build/nodes/Notary
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ports:
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- "10002"
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- "10003"
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partya:
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build: /Users/<USER>/Projects/json-cordapp/workflows-java/build/nodes/PartyA
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ports:
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- "10002"
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- "10003"
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partyb:
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build: /Users/<USER>/Projects/json-cordapp/workflows-java/build/nodes/PartyB
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ports:
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- "10002"
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- "10003"
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Running the Cordform/Dockerform tasks
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-------------------------------------
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To create the nodes defined in our ``deployNodes`` task, run the following command in a terminal window from the root
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of the project where the ``deployNodes`` task is defined:
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* Linux/macOS: ``./gradlew deployNodes``
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* Windows: ``gradlew.bat deployNodes``
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This will create the nodes in the ``build/nodes`` folder. There will be a node folder generated for each node defined
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in the ``deployNodes`` task, plus a ``runnodes`` shell script (or batch file on Windows) to run all the nodes at once
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for testing and development purposes. If you make any changes to your CorDapp source or ``deployNodes`` task, you will
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need to re-run the task to see the changes take effect.
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If the task is a ``Dockerform`` task, running the task will also create an additional ``Dockerfile`` in each node
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directory in the ``build/nodes`` directory.
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