This is a pre-production deployment of Warehouse, however changes made here WILL affect the production instance of PyPI.
Latest Version Dependencies status unknown Test status unknown Test coverage unknown
Project Description
monasca-persister
=============

The Monitoring Persister consumes metrics and alarm state transitions from the Message Queue and stores them in the Metrics and Alarms database.

Although the Persister isn't primarily a Web service it uses DropWizard, https://dropwizard.github.io/dropwizard/ which provides a nice Web application framework to expose an http endpoint that provides an interface through which metrics about the Persister can be queried as well as health status.

The basic design of the Persister is to have one Kafka consumer publish to a Disruptor, https://github.com/LMAX-Exchange/disruptor that has output processors. The output processors use prepared batch statements to write to the Metrics and Alarms database.

The number of output processors/threads in the Persister can be specified to scale to more messages. To horizontally scale and provide fault-tolerance any number of Persisters can be started as consumers from the Message Queue.

# Build

Requires monasca-common from https://github.com/openstack/monasca-common Download and build following instructions in its README.md. Then build monasca-persister by:

```
mvn clean package
```

# Configuration

A sample configuration file is available in java/src/deb/etc/persister-config.yml-sample.

A second configuration file is provided in java/src/main/resources/persister-config.yml for use with the [vagrant "mini-mon" development environment](https://github.com/openstack/monasca-vagrant/)

# TODO

* Purge metrics on shutdown
* Add more robust offset management in Kafka. Currently, the offset is advanced as each message is read. If the Persister stops after the metric has been read and prior to it being committed to the Metrics and Alarms database, the metric will be lost.
* Add better handling of SQL exceptions.
* Complete health check.
* Specify and document the names of the metrics that are available for monitoring of the Persister.
* Document the yaml configuration parameters.

# License

Copyright (c) 2014 Hewlett-Packard Development Company, L.P.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied.
See the License for the specific language governing permissions and
limitations under the License.



Release History

Release History

1.2.0

This version

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1.1.0

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1.0.0

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0.1.15

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0.1.14

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0.1.13

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0.1.12

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0.1.11

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0.1.10

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0.1.9

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0.1.8

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0.1.7

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0.1.6

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0.1.5

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0.1.4

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0.1.3

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0.1.2

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0.1.1

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0.1.0

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ddf3f1b

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Download Files

Download Files

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File Name & Checksum SHA256 Checksum Help Version File Type Upload Date
monasca_persister-1.2.0-py2.py3-none-any.whl (25.3 kB) Copy SHA256 Checksum SHA256 py2.py3 Wheel Dec 5, 2016
monasca-persister-1.2.0.tar.gz (49.7 kB) Copy SHA256 Checksum SHA256 Source Dec 5, 2016

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