openstack
/
congress
Code Issues Proposed changes

start datasource drivers before policy engine 

Also starts API last to avoid accepting API requests before other
services are up.

HA doc updated to start DSD node before PE nodes.

Change-Id: I27cd1149e1f52b596c1ae77ca1400113a53213f5
Closes-Bug: 1646280
This commit is contained in:
Eric K 2016-11-30 16:14:42 -08:00
parent c4ef12cb38
commit 5262be2d30
2 changed files with 33 additions and 30 deletions
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25
congress/harness.py
View File

@ -75,18 +75,6 @@ def create2(node_id=None, bus_id=None, existing_node=None,
# create services as required
services = {}
if api:
LOG.info("Registering congress API service on node %s", node.node_id)
services['api'], services['api_service'] = create_api()
node.register_service(services['api_service'])
if policy_engine:
LOG.info("Registering congress PolicyEngine service on node %s",
node.node_id)
services[api_base.ENGINE_SERVICE_ID] = create_policy_engine()
node.register_service(services[api_base.ENGINE_SERVICE_ID])
initialize_policy_engine(services[api_base.ENGINE_SERVICE_ID])
if datasources:
LOG.info("Registering congress datasource services on node %s",
node.node_id)
@ -104,6 +92,13 @@ def create2(node_id=None, bus_id=None, existing_node=None,
# LOG.exception("Datasource %s creation failed. %s" % (ds, e))
# node.unregister_service(ds)
if policy_engine:
LOG.info("Registering congress PolicyEngine service on node %s",
node.node_id)
services[api_base.ENGINE_SERVICE_ID] = create_policy_engine()
node.register_service(services[api_base.ENGINE_SERVICE_ID])
initialize_policy_engine(services[api_base.ENGINE_SERVICE_ID])
# start synchronizer and other periodic tasks
if policy_engine:
services[api_base.ENGINE_SERVICE_ID].start_policy_synchronizer()
@ -111,6 +106,12 @@ def create2(node_id=None, bus_id=None, existing_node=None,
node.start_periodic_tasks()
node.register_service(
dse_node.DSManagerService(dse_node.DS_MANAGER_SERVICE_ID))
if api:
LOG.info("Registering congress API service on node %s", node.node_id)
services['api'], services['api_service'] = create_api()
node.register_service(services['api_service'])
return services

38
doc/source/ha-deployment.rst
View File

@ -80,24 +80,6 @@ For example:
connection = mysql+pymysql://root:<database-password>@<shared-database-ip-address>/congress?charset=utf8
Policy Engine Nodes
=====================
In this step, we deploy N (at least 2) policy-engine nodes, each with an
associated API server. Each node can be started as follows:
.. code-block:: console
$ python /usr/local/bin/congress-server --api --policy-engine --node-id=<unique_node_id>
Each node must have a unique node-id specified as a commandline option.
For high availability, each node is usually deployed on a different host. If
multiple nodes are to be deployed on the same host, each node must have a
different port specified using the ``bind_port`` configuration option in the
congress configuration file.
Datasource Drivers Node
========================
@ -163,6 +145,26 @@ The RA has following configurable parameters.
* binary(Option): a path of Congress binary Default is "/usr/local/bin/congress-server".
* additional_parameters(Option): additional parameters of congress-server
Policy Engine Nodes
=====================
In this step, we deploy N (at least 2) policy-engine nodes, each with an
associated API server. This step should be done only after the
`Datasource Drivers Node`_ is deployed. Each node can be started as follows:
.. code-block:: console
$ python /usr/local/bin/congress-server --api --policy-engine --node-id=<unique_node_id>
Each node must have a unique node-id specified as a commandline option.
For high availability, each node is usually deployed on a different host. If
multiple nodes are to be deployed on the same host, each node must have a
different port specified using the ``bind_port`` configuration option in the
congress configuration file.
Load-balancer
==============