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* Instructions on how to perform H2 DB upgrades without starting the node. * Formatting error. Adds required subsections in H2 docs. * Merges duplicated information about H2 DB access. * Drops script references for now. * Clarifies upgrade notes. * Better title. * Inr * Addresses review comments. * Addresses review comments.
105 lines
3.8 KiB
ReStructuredText
105 lines
3.8 KiB
ReStructuredText
Database access when running H2
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===============================
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.. contents::
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Configuring the username and password
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-------------------------------------
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The database (a file called ``persistence.mv.db``) is created when the node first starts up. By default, it has an
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administrator user ``sa`` and a blank password. The node requires the user with administrator permissions in order to
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creates tables upon the first startup or after deploying new CorDapps with their own tables. The database password is
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required only when the H2 database is exposed on non-localhost address (which is disabled by default).
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This username and password can be changed in node configuration:
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.. sourcecode:: groovy
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dataSourceProperties = {
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dataSource.user = [USER]
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dataSource.password = [PASSWORD]
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}
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Note that changing the user/password for the existing node in ``node.conf`` will not update them in the H2 database.
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You need to log into the database first to create a new user or change a user's password.
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Connecting via a socket on a running node
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-----------------------------------------
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Configuring the port
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^^^^^^^^^^^^^^^^^^^^
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Nodes backed by an H2 database will not expose this database by default. To configure the node to expose its internal
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database over a socket which can be browsed using any tool that can use JDBC drivers, you must specify the full network
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address (interface and port) using the ``h2Settings`` syntax in the node configuration.
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The configuration below will restrict the H2 service to run on ``localhost``:
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.. sourcecode:: groovy
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h2Settings {
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address: "localhost:12345"
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}
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If you want H2 to auto-select a port (mimicking the old ``h2Port`` behaviour), you can use:
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.. sourcecode:: groovy
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h2Settings {
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address: "localhost:0"
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}
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If remote access is required, the address can be changed to ``0.0.0.0`` to listen on all interfaces. A password must be
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set for the database user before doing so.
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.. sourcecode:: groovy
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h2Settings {
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address: "0.0.0.0:12345"
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}
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dataSourceProperties {
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dataSource.password : "strongpassword"
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}
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.. note:: The previous ``h2Port`` syntax is now deprecated. ``h2Port`` will continue to work but the database will only
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be accessible on localhost.
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Connecting to the database
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^^^^^^^^^^^^^^^^^^^^^^^^^^
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The JDBC URL is printed during node startup to the log and will typically look like this:
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``jdbc:h2:tcp://localhost:31339/node``
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Any database browsing tool that supports JDBC can be used.
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Connecting using the H2 Console
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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* Download the **last stable** `h2 platform-independent zip <http://www.h2database.com/html/download.html>`_, unzip the
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zip, and navigate in a terminal window to the unzipped folder
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* Change directories to the bin folder: ``cd h2/bin``
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* Run the following command to open the h2 web console in a web browser tab:
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* Unix: ``sh h2.sh``
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* Windows: ``h2.bat``
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* Paste the node's JDBC URL into the JDBC URL field and click ``Connect``, using the default username (``sa``) and no
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password (unless configured otherwise)
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You will be presented with a web interface that shows the contents of your node's storage and vault, and provides an
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interface for you to query them using SQL.
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.. _h2_relative_path:
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Connecting directly to the node's ``persistence.mv.db`` file
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------------------------------------------------------------
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You can also use the H2 Console to connect directly to the node's ``persistence.mv.db`` file. Ensure the node is off
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before doing so, as access to the database file requires exclusive access. If the node is still running, the H2 Console
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will return the following error:
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``Database may be already in use: null. Possible solutions: close all other connection(s); use the server mode [90020-196]``.
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``jdbc:h2:~/path/to/file/persistence``
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