component/opcua-server: make configurable

component/opcua-server/buildout.cfg

@@ -12,46 +12,38 @@ egg-versions =
   python-dateutil = 2.8.2:whl
 entry-points = ${:_buildout_section_name_}=__main__:main
 initialization =
-  import sys
-  ip = sys.argv[1]
-  port = 2262  # hard coded here + in stack/erp5/haproxy.cfg.in
-  # Adjusted minimal server example from opcua-asyncio documentation
-  # https://opcua-asyncio.readthedocs.io/en/latest/usage/get-started/minimal-server.html
+  # ######################
+  # Configure
+  import argparse
+  parser = argparse.ArgumentParser(description='Run OPCUA Server.')
+  parser.add_argument(
+    '--ip', help='The IP address on which the OPCUA Server runs', default="127.0.0.1"
+  )
+  parser.add_argument(
+    '--port', help='The port on which the OPCUA Server runs', default="2262"
+  )
+  parser.add_argument(
+    '--xml',
+    help='Path of XML to configure Server. See asyncua doc for more details.',
+    default=None
+  )
+  args = parser.parse_args()
+  ip, port, xml = args.ip, args.port, args.xml
+  # ######################
   import asyncio
   import logging
-  from asyncua import Server, ua
-  from asyncua.common.methods import uamethod
-  @uamethod
-  def func(parent, value):
-    return value * 2
+  from asyncua import Server
   async def main():
     _logger = logging.getLogger(__name__)
     # setup our server
     server = Server()
     await server.init()
     server.set_endpoint(f"tcp://{ip}:{port}")
-    # setup our own namespace, not really necessary but should as spec
-    uri = "http://examples.freeopcua.github.io"
-    idx = await server.register_namespace(uri)
-    # populating our address space
-    # server.nodes, contains links to very common nodes like objects and root
-    myobj = await server.nodes.objects.add_object(idx, "MyObject")
-    myvar = await myobj.add_variable(idx, "MyVariable", 6.7)
-    # Set MyVariable to be writable by clients
-    await myvar.set_writable()
-    await server.nodes.objects.add_method(
-      ua.NodeId("ServerMethod", idx),
-      ua.QualifiedName("ServerMethod", idx),
-      func,
-      [ua.VariantType.Int64],
-      [ua.VariantType.Int64],
-    )
+    if xml is not None:
+      await server.import_xml(xml)
     _logger.info("Starting server!")
     async with server:
       while True:
         await asyncio.sleep(1)
-        new_val = await myvar.get_value() + 0.1
-        _logger.info("Set value of %s to %.1f", myvar, new_val)
-        await myvar.write_value(new_val)
   logging.basicConfig(level=logging.DEBUG)
   asyncio.run(main(), debug=True)

stack/erp5/buildout.hash.cfg

@@ -106,4 +106,4 @@ md5sum = eb4be2669a9a56187cc4366272e11d18
 
 [instance-opcua-server.cfg.in]
 filename = instance-opcua-server.cfg.in
-md5sum = aeb48d87bac998402aba6ca829d62466
+md5sum = 207b458e52de1a038af807274345b5ff

stack/erp5/instance-opcua-server.cfg.in

 {% set ipv4 = (ipv4_set | list)[0] -%}
+{# port is hard coded here + in stack/erp5/haproxy.cfg.in #}
+{% set port = 2262 %}
 
 [buildout]
 extends = {{ template_monitor }}
@@ -18,5 +20,6 @@ var = ${buildout:directory}/var
 
 [opcua-server]
 recipe = slapos.cookbook:wrapper
-command-line = {{ bin_directory }}/opcua-server  {{ ipv4 }}
+command-line =
+  {{ bin_directory }}/opcua-server  --ip {{ ipv4 }} --port {{ port }}
 wrapper-path = ${directory:service-on-watch}/opcua-server