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173 lines
6.8 KiB
ReStructuredText
173 lines
6.8 KiB
ReStructuredText
Creating nodes locally
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======================
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.. contents::
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Node structure
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--------------
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Each Corda node has the following structure:
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.. sourcecode:: none
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.
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├── certificates // The node's certificates
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├── corda-webserver.jar // The built-in node webserver
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├── corda.jar // The core Corda libraries
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├── logs // The node logs
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├── node.conf // The node's configuration files
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├── persistence.mv.db // The node's database
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└── cordapps // The CorDapps jars installed on the node
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The node is configured by editing its ``node.conf`` file. You install CorDapps on the node by dropping the CorDapp JARs
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into the ``cordapps`` folder.
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Node naming
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-----------
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A node's name must be a valid X.500 distinguished name. In order to be compatible with other implementations
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(particularly TLS implementations), we constrain the allowed X.500 attribute types to a subset of the minimum supported
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set for X.509 certificates (specified in RFC 3280), plus the locality attribute:
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* Organization (O)
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* State (ST)
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* Locality (L)
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* Country (C)
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* Organizational-unit (OU)
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* Common name (CN) (only used for service identities)
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The name must also obey the following constraints:
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* The organisation, locality and country attributes are present
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* The state, organisational-unit and common name attributes are optional
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* The fields of the name have the following maximum character lengths:
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* Common name: 64
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* Organisation: 128
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* Organisation unit: 64
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* Locality: 64
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* State: 64
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* The country attribute is a valid ISO 3166-1 two letter code in upper-case
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* All attributes must obey the following constraints:
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* Upper-case first letter
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* Has at least two letters
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* No leading or trailing whitespace
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* Does not include the following characters: ``,`` , ``=`` , ``$`` , ``"`` , ``'`` , ``\``
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* Is in NFKC normalization form
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* Does not contain the null character
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* Only the latin, common and inherited unicode scripts are supported
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* The organisation field of the name also obeys the following constraints:
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* No double-spacing
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* This is to avoid right-to-left issues, debugging issues when we can't pronounce names over the phone, and
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character confusability attacks
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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. Here is an example ``Cordform`` task called ``deployNodes`` that creates three nodes, defined in the
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`Kotlin CorDapp Template <https://github.com/corda/cordapp-template-kotlin/blob/release-V2/build.gradle#L97>`_:
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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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networkMap "O=NetworkMapAndNotary,L=London,C=GB"
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node {
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name "O=NetworkMapAndNotary,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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rpcPort 10003
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// No webport property, so no webserver will be created.
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h2Port 10004
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// Includes the corda-finance CorDapp on our node.
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cordapps = ["net.corda:corda-finance:$corda_release_version"]
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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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rpcPort 10006
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webPort 10007
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h2Port 10008
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cordapps = ["net.corda:corda-finance:$corda_release_version"]
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// Grants user1 all RPC permissions.
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rpcUsers = [[ user: "user1", "password": "test", "permissions": ["ALL"]]]
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}
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node {
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name "O=PartyB,L=New York,C=US"
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p2pPort 10009
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rpcPort 10010
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webPort 10011
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h2Port 10012
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cordapps = ["net.corda:corda-finance:$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 ``NetworkMapAndNotary`` node that:
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* Serves as the network map
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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 pointing at the ``NetworkMapAndNotary`` as the network map service
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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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You can extend ``deployNodes`` to generate additional nodes. The only requirement is that you must specify
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a single node to run the network map service, by putting its name in the ``networkMap`` field.
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.. warning:: When adding nodes, make sure that there are no port clashes!
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Specifying a custom webserver
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-----------------------------
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By default, any node listing a webport 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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Running deployNodes
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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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You can now run the nodes by following the instructions in :doc:`Running a node <running-a-node>`.
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