Under the current system there's no distinction made on the slave side
between instance config files that are present in the filesystem and
instances actually assigned to the slave. Which could lead to problems
with determing if an instance is actually assigned to the slave.
Resolve this issue by separating discovered instances with assigned
instances. Upon startup discovered instances are put into the
discoveredInstanceInfos mapping on the Slave object and all of these are
sent to the master server. The master server in turn sends assignment
requests for all the instances which are assigned to the slave. These
are put into the instanceInfos mapping of the Slave object which can
then be relied up to include only assigned instances.
Amend the error message shown when a message handler is missing from a
plugin with the expected name of the handler and the name of the plugin
it's missing from.
Print only the error message in the console when a connection error is
encountered on the link connector. This reduces log spam on reconnect
for slaves.
Use lib* prefix for the modules impored from the lib package to help
distinguish them more from ordinary variables. Fix up the naming
convention for files to be consistently lowercase_underscore for
JavaScript files.
Send the status of the instance in the repsonse to the listInstances
request and use this status in the integration tests to check if the
instance was started/stopped.
Add the statuses unknown and unassigned for when the status has not yet
been set by a slave and replace the initialized status with starting,
creating_save and exporting_data.
Replace usage of .constructor.name with a separate property to avoid
issue with JavaScript terser mangling the class name during minification
for the web build.
Make the config and link libraries compatible with packing for web with
webpack. This would fail due to ws not being web compatible and config
using a node function not available in the web shim for util.
Split up codebase into the packages @clsterio/lib, @clusterio/master,
@clusterio/slave, and @clusterio/ctl using lerna to manage them. This
will allow deployment to use only the parts needed reducing install
size, and better separate the code into shared library, master, slave
and control.