This application analyzes and streams sentiment from a Twitter hash tag. Its aim is to show the same exact code, and repository content can be used to push an app into cloud foundry, as well as build a Docker container, thereby showing that the Docker container is a redundant step which takes time for building updated versions of the app image.
To build you own Docker image from this demo it is recommended to create a DockerHub registry account, and create an automated build from a forked version of this repo.
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Obtain Twitter Application keys from https://apps.twitter.com
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Fork this repo to your own GitHub account
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Create a DockerHub registry account
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Create an automated build of your forked repo: https://docs.docker.com/docker-hub/builds/
Run this repo either as a standalone PCF app, or as a Docker image pushed to PCF.
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Open the manifest file in a text editor, modify the parameters and environment variables for your deployment
--- applications: - name: twitter-sentiment host: twitter-sentiment memory: 512M instances: 1 buildpack: python_buildpack env: APP_KEY: LwInchdbrgzrfxOAerglOt5GieCgqsdsfdYE3U APP_SECRET: FJDjergerg5G8FergergLQViobcbergergSbBPdKvCwxU93JmOnIprtoeAimVLUXmyiM OAUTH_TOKEN: 292erge771e-kxy3bhFTergergl2Kktyzu8ukzyikPScaesrfbuayqgq7gGW OAUTH_TOKEN_SECRET: JFEaeFGGDeSHg3VQcccdI8Pfj7ghvnj67dh INCLUDE_TWITTER_HASH: bigdata MAX_CHART_SIZE: 5000 -
Push the code into PCF using the updated manifest
$ cf push -f manifest.yml
The Docker file contains dummy environment variables which need to be set before running the app in PCF.
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Open the Dockerfile, note the dummy environment variables (do not change)
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Push the app into PCF using your own account and image name
$ $ cf push -f docker-manifest.yml -o bbertka/ltc-twitter-sentiment-demo
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Update the docker-manifest.yml with your own values for the following environment variables
$ cf set-env APP_NAME ENV_VAR_NAME ENV_VAR_VALUE
ENV APP_KEY LwInchdbrgzrfxOAerglOt5GieCgqsdsfdYE3U ENV APP_SECRET FJDjergerg5G8FergergLQViobcbergergSbBPdKvCwxU93JmOnIprtoeAimVLUXmyiM ENV OAUTH_TOKEN 292erge771e-kxy3bhFTergergl2Kktyzu8ukzyikPScaesrfbuayqgq7gGW ENV OAUTH_TOKEN_SECRET JFEaeFGGDeSHg3VQcccdI8Pfj7ghvnj67dh ENV MAX_CHART_SIZE 5000 ENV INCLUDE_TWITTER_HASH "#bigdata" -
Restage the docker based app to pull in the environment changes
$ cf restage APP_NAME
Congratulations! You have pushed a container agnostic app into PCF without having to modify the code for both cloud native PCF and Docker based image deployment.