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CORDA-1712 - Make documentation clearer for Network Bootstrapper (#3504)
This commit is contained in:
Anthony Keenan
Michele Sollecito
parent
d481c55b82
commit
857ed1897a
3
.idea/compiler.xml
generated
3
.idea/compiler.xml
generated
@ -79,6 +79,9 @@
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<module name="example-code_integrationTest" target="1.8" />
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<module name="example-code_main" target="1.8" />
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<module name="example-code_test" target="1.8" />
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<module name="experimental-behave_behave" target="1.8" />
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<module name="experimental-behave_main" target="1.8" />
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<module name="experimental-behave_test" target="1.8" />
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<module name="experimental-kryo-hook_main" target="1.8" />
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<module name="experimental-kryo-hook_test" target="1.8" />
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<module name="experimental_main" target="1.8" />
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@ -45,8 +45,6 @@ will generate directories containing three nodes: ``notary``, ``partya`` and ``p
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that comes with the bootstrapper. If a different version of Corda is required then simply place that ``corda.jar`` file
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alongside the configuration files in the directory.
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The directory can also contain CorDapp JARs which will be copied to each node's ``cordapps`` directory.
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You can also have the node directories containing their "node.conf" files already laid out. The previous example would be:
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.. sourcecode:: none
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@ -61,33 +59,34 @@ You can also have the node directories containing their "node.conf" files alread
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Similarly, each node directory may contain its own ``corda.jar``, which the bootstrapper will use instead.
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Synchronisation
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~~~~~~~~~~~~~~~
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Providing CorDapps to the Network Bootstrapper
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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This tool only bootstraps a network. It cannot dynamically update if a new node needs to join the network or if an existing
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one has changed something in their node-info, e.g. their P2P address. For this the new node-info file will need to be placed
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in the other nodes' ``additional-node-infos`` directory. A simple way to do this is to use `rsync <https://en.wikipedia.org/wiki/Rsync>`_.
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However, if it's known beforehand the set of nodes that will eventually form part of the network then all the node directories
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can be pregenerated in the bootstrap and only started when needed.
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If you would like the Network Bootstrapper to include your CorDapps in each generated node, just place them in the directory
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alongside the config files. For example, if your directory has this structure:
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Running the bootstrapper again on the same network will allow a new node to be added or an existing one to have its updated
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node-info re-distributed. However this comes at the expense of having to temporarily collect the node directories back
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together again under a common parent directory.
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.. sourcecode:: none
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.
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├── notary_node.conf // The notary's node.conf file
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├── partya_node.conf // Party A's node.conf file
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├── partyb_node.conf // Party B's node.conf file
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├── cordapp-a.jar // A cordapp to be installed on all nodes
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└── cordapp-b.jar // Another cordapp to be installed on all nodes
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The ``cordapp-a.jar`` and ``cordapp-b.jar`` will be installed in each node directory, and any contracts within them will be
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added to the Contract Whitelist (see below).
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Whitelisting contracts
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~~~~~~~~~~~~~~~~~~~~~~
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----------------------
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The CorDapp JARs are also automatically used to create the *Zone whitelist* (see :doc:`api-contract-constraints`) for
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the network.
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Any CorDapps provided when bootstrapping a network will be scanned for contracts which will be used to create the
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*Zone whitelist* (see :doc:`api-contract-constraints`) for the network.
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.. note:: If you only wish to whitelist the CorDapps but not copy them to each node then run with the ``--no-copy`` flag.
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The CorDapp JARs will be hashed and scanned for ``Contract`` classes. These contract class implementations will become part
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of the whitelisted contracts in the network parameters (see ``NetworkParameters.whitelistedContractImplementations`` :doc:`network-map`).
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If the network already has a set of network parameters defined (i.e. the node directories all contain the same network-parameters
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file) then the new set of contracts will be appended to the current whitelist.
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.. note:: The whitelist can only ever be appended to. Once added a contract implementation can never be removed.
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By default the bootstrapper will whitelist all the contracts found in all the CorDapp JARs. To prevent certain
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contracts from being whitelisted, add their fully qualified class name in the ``exclude_whitelist.txt``. These will instead
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@ -99,3 +98,151 @@ For example:
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net.corda.finance.contracts.asset.Cash
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net.corda.finance.contracts.asset.CommercialPaper
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Modifying a bootstrapped network
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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The network bootstrapper is provided as a development tool for setting up Corda networks for development and testing.
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There is some limited functionality which can be used to make changes to a network, but for anything more complicated consider
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using a :doc:`network-map` server.
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When running the Network Bootstrapper, each ``node-info`` file needs to be gathered together in one directory. If
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the nodes are being run on different machines you need to do the following:
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* Copy the node directories from each machine into one directory, on one machine
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* Depending on the modification being made (see below for more information), add any new files required to the root directory
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* Run the Network Bootstrapper from the root directory
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* Copy each individual node's directory back to the original machine
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The network bootstrapper cannot dynamically update the network if an existing node has changed something in their node-info,
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e.g. their P2P address. For this the new node-info file will need to be placed in the other nodes' ``additional-node-infos`` directory.
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If the nodes are located on different machines, then a utility such as `rsync <https://en.wikipedia.org/wiki/Rsync>`_ can be used
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so that the nodes can share node-infos.
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Adding a new node to the network
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--------------------------------
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Running the bootstrapper again on the same network will allow a new node to be added and its
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node-info distributed to the existing nodes.
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As an example, if we have an existing bootstrapped network, with a Notary and PartyA and we want to add a PartyB, we
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can use the network bootstrapper on the following network structure:
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.. sourcecode:: none
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.
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├── notary // existing node directories
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│ ├── node.conf
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│ ├── network-parameters
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│ ├── node-info-notary
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│ └── additional-node-infos
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│ ├── node-info-notary
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│ └── node-info-partya
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├── partya
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│ ├── node.conf
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│ ├── network-parameters
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│ ├── node-info-partya
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│ └── additional-node-infos
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│ ├── node-info-notary
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│ └── node-info-partya
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└── partyb_node.conf // the node.conf for the node to be added
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Then run the network bootstrapper again from the root dir:
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``java -jar network-bootstrapper-VERSION.jar --dir <nodes-root-dir>``
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Which will give the following:
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.. sourcecode:: none
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.
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├── notary // the contents of the existing nodes (keys, db's etc...) are unchanged
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│ ├── node.conf
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│ ├── network-parameters
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│ ├── node-info-notary
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│ └── additional-node-infos
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│ ├── node-info-notary
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│ ├── node-info-partya
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│ └── node-info-partyb
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├── partya
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│ ├── node.conf
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│ ├── network-parameters
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│ ├── node-info-partya
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│ └── additional-node-infos
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│ ├── node-info-notary
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│ ├── node-info-partya
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│ └── node-info-partyb
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└── partyb // a new node directory is created for PartyB
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├── node.conf
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├── network-parameters
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├── node-info-partyb
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└── additional-node-infos
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├── node-info-notary
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├── node-info-partya
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└── node-info-partyb
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The bootstrapper will generate a directory and the ``node-info`` file for PartyB, and will also make sure a copy of each
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nodes' ``node-info`` file is in the ``additional-node-info`` directory of every node. Any other files in the existing nodes,
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such a generated keys, will be unaffected.
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.. note:: The bootstrapper is provided for test deployments and can only generate information for nodes collected on
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the same machine. If a network needs to be updated using the bootstrapper once deployed, the nodes will need
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collecting back together.
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Updating the contract whitelist for bootstrapped networks
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---------------------------------------------------------
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If the network already has a set of network parameters defined (i.e. the node directories all contain the same network-parameters
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file) then the bootstrapper can be used to append contracts from new CorDapps to the current whitelist.
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For example, with the following pre-generated network:
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.. sourcecode:: none
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.
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├── notary
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│ ├── node.conf
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│ ├── network-parameters
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│ └── cordapps
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│ └── cordapp-a.jar
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├── partya
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│ ├── node.conf
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│ ├── network-parameters
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│ └── cordapps
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│ └── cordapp-a.jar
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├── partyb
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│ ├── node.conf
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│ ├── network-parameters
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│ └── cordapps
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│ └── cordapp-a.jar
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└── cordapp-b.jar // The new cordapp to add to the existing nodes
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Then run the network bootstrapper again from the root dir:
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``java -jar network-bootstrapper-VERSION.jar --dir <nodes-root-dir>``
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To give the following:
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.. sourcecode:: none
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.
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├── notary
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│ ├── node.conf
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│ ├── network-parameters // The contracts from cordapp-b are appended to the whitelist in network-parameters
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│ └── cordapps
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│ ├── cordapp-a.jar
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│ └── cordapp-b.jar // The updated cordapp is placed in the nodes cordapp directory
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├── partya
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│ ├── node.conf
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│ ├── network-parameters // The contracts from cordapp-b are appended to the whitelist in network-parameters
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│ └── cordapps
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│ ├── cordapp-a.jar
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│ └── cordapp-b.jar // The updated cordapp is placed in the nodes cordapp directory
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└── partyb
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├── node.conf
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├── network-parameters // The contracts from cordapp-b are appended to the whitelist in network-parameters
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└── cordapps
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├── cordapp-a.jar
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└── cordapp-b.jar // The updated cordapp is placed in the nodes cordapp directory
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.. note:: The whitelist can only ever be appended to. Once added a contract implementation can never be removed.
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