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https://github.com/Cumulocity-IoT/apama-streaming-analytics-docker-samples

The samples in this repository demonstrate how you can use Docker to deploy and manage entire Apama applications.
https://github.com/Cumulocity-IoT/apama-streaming-analytics-docker-samples

apama iot-analytics

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The samples in this repository demonstrate how you can use Docker to deploy and manage entire Apama applications.

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README 

        
# Apama samples for Docker and Kubernetes



## License

Copyright (c) 2017-2023 Software AG, Darmstadt, Germany and/or Software AG USA Inc., Reston, VA, USA, and/or its subsidiaries and/or its affiliates and/or their licensors.  



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.



## Apama packaging kit for Docker

This package contains configuration and samples to help you containerize and

run Apama components and applications on the Docker platform.



See the Supported Platforms document for information about recommended Docker

versions and support. This is available from the following web page:

https://documentation.softwareag.com/apama/index.htm 



Docker and the Docker logo are trademarks or registered trademarks of Docker,

Inc. in the United States and/or other countries. Docker, Inc. and other

parties may also have trademark rights in other terms used herein.



## Image list



Software AG produces several different variations of the Apama product as Docker images, depending on your use case. Please consult this table for the various images and their uses:



| Image                                                                                               | Use                                                                                                                         |

|-----------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------|

| [softwareag/apama-correlator](https://hub.docker.com/r/softwareag/apama-correlator)                 | Image for the correlator including support for Java and Python. Doesn't contain connectivity to other Software AG products.	|

| [softwareag/apama-correlator-minimal](https://hub.docker.com/r/softwareag/apama-correlator-minimal) | Smallest image for the correlator, aimed at pure-Apama use cases. Doesn't contain Java or Python support, or connectivity to other Software AG products. |

| [softwareag/apama-correlator-suite](https://hub.docker.com/r/softwareag/apama-correlator-suite)     | Image for the correlator containing support for Java, Python, and connectivity to the rest of the Software AG product suite and JMS. |

| [softwareag/apama-cumulocity-jre](https://hub.docker.com/r/softwareag/apama-cumulocity-jre)         | Base image for custom Cumulocity IoT microservices, containing the correlator and connectivity to Cumulocity IoT. |

| [softwareag/apama-builder](https://hub.docker.com/r/softwareag/apama-builder)                       | Project build and test tools for deploying and testing projects to be used with the "apama-correlator" and "apama-minimal" images in a multi-stage Docker build. |

| [softwareag/apama-builder-suite](https://hub.docker.com/r/softwareag/apama-builder-suite)           | Project build and test tools (including Apache Ant) for deploying and testing projects, to be used with the "apama-correlator-suite" image in a multi-stage Docker build. |

| [softwareag/apama-cumulocity-builder](https://hub.docker.com/r/softwareag/apama-cumulocity-builder) | Project build and test tools for deploying and testing projects to be used with the "apama-cumulocity-jre" image in a multi-stage Docker build. |



## Running a Docker image

You can turn an image into a running container with the 'docker run'

command. But before you do, there are a number of configuration options you

will need to consider.



### Exposed ports:

As a virtualization platform, Docker runs each container in its own

isolated network stack. Any exposure to the host operating system's

network stack, or to that of other containers, must be explicit.

Via the EXPOSE element of the Dockerfile, the image designates the ports

that it may be listening on. In this case, these are the default ports of

the correlator.



The simplest way to make use of this is via the '-p' option which maps a

listening port in the container to a listening port on the host networking

stack. For an Apama image, you will probably want to map port 15903, the

default listening port of the correlator.



The more usual/idiomatic way is to link containers directly together,

entirely ignoring the host operating system, but this is covered in later

samples.



Ultimately, turning an image into a running container will look

something like this:



> docker run -d -p 15903:15903 --name apama_in_docker softwareag/apama-correlator:10.15



You can then look for your running container:



> docker ps



|CONTAINER ID      |IMAGE           |COMMAND             |CREATED             |STATUS       |PORTS      |NAMES|

|---               |---             |---                 |---                 |---          |---        |---          |

|41d25137fbd0      |softwareag/apama-correlator:10.15    |"correlator -j"     |2 seconds ago       |Up Less than a second |0.0.0.0:15903->15903/tcp   |apama_in_docker  |



## Interacting with the container

Now you will be able to interact with the correlator running inside the

container. Because ports from the container have been mapped to the host

operating system's networking stack, you can run Apama commands outside of

Docker to do this. A Docker-based application should not normally rely on

processes in the host operating system, but this approach is sufficient for

the current example.



From a shell in this directory, source Apama/bin/apama_env then run:



> engine_inject -p 15903 -n localhost applications/Simple/HelloWorld.mon



Some simple EPL will then be executed inside your containerized correlator.

Note the use of 'localhost' and '15903' to connect to the mapped port. You can

see the evidence with another Apama command, similarly invoked:



> engine_inspect -p 15903 -n localhost 



This will show you the existing 'HelloWorld' monitor.



### Interacting with the container from another container



Apama commands can also be run from an Apama container. To begin you need to create a common network in docker that the containers will share:



```

docker network create my-network

```



Now, start up the correlator, either using the option above or the following simple option without a port exposed.



```

docker run -d --net my-network --name correlator_container softwareag/apama-correlator:10.15

```



An optional stage which will prove that the network is working as expected is to fire up a busybox container and ping the apama container by name:



```

docker run -it --name mybusybox --net my-network --rm busybox

# ping correlator_container

PING correlator_container (192.168.48.2): 56 data bytes

64 bytes from 192.168.48.2: seq=0 ttl=64 time=0.145 ms

64 bytes from 192.168.48.2: seq=1 ttl=64 time=0.105 ms

...

```



Then the sample file can be passed to the Apama instance by using a local volume. Update  to the local path where this repo resides. For example:



```

docker run --rm -t -i -v //apama-streaming-analytics-docker-samples/applications/Simple/HelloWorld.mon:/apama_work/HelloWorld.mon --net my-network softwareag/apama-correlator:10.15 engine_inject /apama_work/HelloWorld.mon -n correlator_container

```

Finally, the status of the Correlator can be checked as well:



```

docker run --rm -t -i --net my-network softwareag/apama-correlator:10.15 engine_inspect -n correlator_container

```



Or if you wish to watch it:



```

docker run --rm -t -i --net my-network softwareag/apama-correlator:10.15 engine_watch -n correlator_container

```



## Log files

Docker treats anything emitted on the console by a contained process as

logging, and stores it appropriately. All of the examples and samples in this

package ensure that Apama components log to the console. Try:



> docker logs apama_in_docker



to see the log message that announced the injection of the .mon file from the

above example.



## Licensing

For adding a license to your image refer to section on licensing in ['image/README'](image/README.md).



## Generating Deployment Files

Some of these Docker samples use an 'initialization.yaml' configuration

file when starting the correlator process to allow the correlator to initialize

itself. To generate the 'initialization.yaml' file, the

'engine_deploy' tool is execute on a Designer project or directory. See the 

documentation for details, but an example using the 'Weather' sample can be run

from the Apama Command prompt of your Software AG installation:



> engine_deploy ./apama-samples/studio/demos/Weather --outputDeployDir ./apama-samples/docker/applications/Weather



## Next steps

There are multiple samples provided that teach you how to use Docker Compose

and other Docker features to run and manage entire multi-process applications

from inside Docker.



Please see the supplied samples which can be found under 'applications/'. You

should start with the top level [README](applications/README.md) found directly under this folder. 



Each sample application also then has an individual README:



|Readme|

|---|

|[Adapter](applications/Adapter/README.md)|

|[MemoryStore](applications/MemoryStore/README.md)|

|[Simple](applications/Simple/README.md)|

|[UniversalMessaging](applications/UniversalMessaging/README.md)|

|[Weather](applications/Weather/README.md)|



______________________

These tools are provided as-is and without warranty or support. They do not constitute part of the Software AG product suite. Users are free to use, fork and modify them, subject to the license agreement. While Software AG welcomes contributions, we cannot guarantee to include every contribution in the main project.



Contact us at [TECHcommunity](mailto:[email protected]?subject=Github/SoftwareAG) if you have any questions.