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Obsolete! Use CA APM Agentless Docker Monitor and Container Flow Map instead

Docker Field Pack 1.0

Description

Docker is an open platform for developers and sysadmins to build, ship, and run distributed applications. The Docker field pack gathers metrics from the Docker Remote API via https.

APM version

Restful EPAgent 9.7.1.

Supported third party versions

Tested with Docker version 1.6.1, API version 1.18.

Limitations

Currently the field pack only queries one docker engine and only works via https. I have tested it only with boot2docker on MacOS. Recently I had problems with the certificate so I disabled certificate verification.

License

Apache License, Version 2.0, January 2004. See Licensing on the CA APM Developer Community.

Installation Instructions

Prerequisites

Dependencies

Pyhton 3 with requests module. This can be obtained in one of the following ways: # yum install python-requests or # pip install requests or # easy_install requests

Installation

  • Extract the zip or tar.gz file.
  • Copy docker.typeviewers.xml to your Enterprise Manager (MOM) <EM_HOME>/ext/xmltv.

Configuration

Nothing else to configure.

Usage Instructions

Running the Docker field pack

Run python3 docker.py from the command line, e.g.:

python3 docker.py -p 8080 -d boot2docker -r 2376 --certificate=$DOCKER_CERT_PATH/cert.pem -k $DOCKER_CERT_PATH/key.pem

Change the parameters to fit your environment. Run the script with option '-h' to get this usage information:

Usage: docker.py [options]

Options:
    -h, --help            show this help message and exit
    -v, --verbose         verbose output
    -H HOSTNAME, --hostname=HOSTNAME
                          hostname EPAgent is running on (default: localhost)
    -p PORT, --port=PORT  http port of the EPAgent (introscope.epagent.config.httpServerPort)
    -m METRICPATH, --metric_path=METRICPATH
                          metric path prefix for all metrics
    -d DOCKERHOST, --docker_host=DOCKERHOST
                          docker hostname (default: localhost)
    -r DOCKERPORT, --docker_port=DOCKERPORT
                          docker Remote API port (default: 2376)
    -c CERTFILE, --certificate=CERTFILE
                          https certificate
    -k KEYFILE, --private_key=KEYFILE
                          https private key

Metric description

Metrics are published under the metrics path "Docker". At this level general information about this docker engine is provided:

  • Container Count
  • Image Count
  • Running Containers
  • Total Memory
  • MemoryLimit (boolean: 0/1)
  • SwapLimit (boolean: 0/1)

Container metric for running containers are published under "Docker|Containers|". Container metrics include

  • Image name
  • SizeRw and SizeRootFS: file system sizes
  • Status
  • CPU metrics (in Ticks)
  • Memory metrics
  • Network metrics (receive and transmit)

For more information see Docker Remote API.

Custom Management Modules

None.

Custom type viewers

The type viewer docker.typeviewers.xml matches metric paths starting with "Docker". Copy it to the ext/xmltv folder of your APM Enterprise Manager and restart WebView or log off and back on to your Workstation. There is an overview providing general metrics and a list of containers. You can even see a Java agent monitoring the Tomcat application server running in container b9febdfcdd77: Docker overview

For every container metrics about file system, CPU, memory and network metrics are shown as graphs: Docker container metrics

Debugging and Troubleshooting

Your can run docker.py with option -v to provide verbose output. In addition you can remove the '#' in front of several print statements throughput the script.

Support

This document and associated tools are made available from CA Technologies as examples and provided at no charge as a courtesy to the CA APM Community at large. This resource may require modification for use in your environment. However, please note that this resource is not supported by CA Technologies, and inclusion in this site should not be construed to be an endorsement or recommendation by CA Technologies. These utilities are not covered by the CA Technologies software license agreement and there is no explicit or implied warranty from CA Technologies. They can be used and distributed freely amongst the CA APM Community, but not sold. As such, they are unsupported software, provided as is without warranty of any kind, express or implied, including but not limited to warranties of merchantability and fitness for a particular purpose. CA Technologies does not warrant that this resource will meet your requirements or that the operation of the resource will be uninterrupted or error free or that any defects will be corrected. The use of this resource implies that you understand and agree to the terms listed herein.

Although these utilities are unsupported, please let us know if you have any problems or questions by adding a comment to the CA APM Community Site area where the resource is located, so that the Author(s) may attempt to address the issue or question.

Unless explicitly stated otherwise this field pack is only supported on the same platforms as the APM core agent. See APM Compatibility Guide.

Change log

Version Author Comment
1.0 Guenter Grossberger First version of the field pack.

Support URL

https://github.com/CA-APM/ca-apm-fieldpack-docker/issues

Short Description

Monitor Docker with CA APM

Categories

Cloud, Virtualization/Containers