App-AutoScaler

The App-AutoScaler provides the capability to adjust the computation resources for Cloud Foundry applications through

• Dynamic scaling based on application performance metrics
• Scheduled scaling based on time

The App-AutoScaler is provided as a Cloud Foundry service offering. Any application bound with App-AutoScaler service will be able to use it. It has the following components:

• api : provides public APIs to manage scaling policy
• servicebroker: implements the Cloud Foundry service broker API
• metricscollector: collects container's memory usage
• eventgenerator: aggreates memory metrics, evaluates scaling rules and triggers events for dynamic scaling
• scheduler: manages the schedules in scaling policy and trigger events for scheduled scaling
• scalingengine: takes the scaling actions based on dynamic scaling rules or schedules

You can follow the development progress on Pivotal Tracker.

Development

System requirements

• Java 8 or above
• Apache Maven 3
• Node 6.2 or above
• NPM 3.9.5 or above
• Cloud Foundry cf command line
• Go 1.7

Database requirement

The App-AutoScaler uses Postgres as the backend data store. To download and install, refer to PostgreSQL web site.

Setup

To set up the development, firstly clone this project

$ git clone https://github.com/cloudfoundry/app-autoscaler.git
$ cd app-autoscaler
$ git submodule update --init --recursive

Initialize the Database

createuser postgres -s
psql postgres://postgres@127.0.0.1:5432 -c 'DROP DATABASE IF EXISTS autoscaler'
psql postgres://postgres@127.0.0.1:5432 -c 'CREATE DATABASE autoscaler'

mvn package
java -cp 'db/target/lib/*' liquibase.integration.commandline.Main --url jdbc:postgresql://127.0.0.1/autoscaler --driver=org.postgresql.Driver --changeLogFile=api/db/api.db.changelog.yml update
java -cp 'db/target/lib/*' liquibase.integration.commandline.Main --url jdbc:postgresql://127.0.0.1/autoscaler --driver=org.postgresql.Driver --changeLogFile=servicebroker/db/servicebroker.db.changelog.json update
java -cp 'db/target/lib/*' liquibase.integration.commandline.Main --url jdbc:postgresql://127.0.0.1/autoscaler --driver=org.postgresql.Driver --changeLogFile=scheduler/db/scheduler.changelog-master.yaml update
java -cp 'db/target/lib/*' liquibase.integration.commandline.Main --url jdbc:postgresql://127.0.0.1/autoscaler --driver=org.postgresql.Driver --changeLogFile=scheduler/db/quartz.changelog-master.yaml update
java -cp 'db/target/lib/*' liquibase.integration.commandline.Main --url jdbc:postgresql://127.0.0.1/autoscaler --driver=org.postgresql.Driver --changeLogFile=src/autoscaler/metricscollector/db/metricscollector.db.changelog.yml update
java -cp 'db/target/lib/*' liquibase.integration.commandline.Main --url jdbc:postgresql://127.0.0.1/autoscaler --driver=org.postgresql.Driver --changeLogFile=src/autoscaler/eventgenerator/db/dataaggregator.db.changelog.yml update
java -cp 'db/target/lib/*' liquibase.integration.commandline.Main --url jdbc:postgresql://127.0.0.1/autoscaler --driver=org.postgresql.Driver --changeLogFile=src/autoscaler/scalingengine/db/scalingengine.db.changelog.yml update
java -cp 'db/target/lib/*' liquibase.integration.commandline.Main --url jdbc:postgresql://127.0.0.1/autoscaler --driver=org.postgresql.Driver --changeLogFile=src/autoscaler/operator/db/operator.db.changelog.yml update

Generate TLS Certificates

./scripts/generate_test_certs.sh

Install consul

To be able to run unit tests and integration tests, you'll need to install consul binary.

if uname -a | grep Darwin; then os=darwin; else os=linux; fi
curl -L -o $TMPDIR/consul-0.7.5.zip "https://releases.hashicorp.com/consul/0.7.5/consul_0.7.5_${os}_amd64.zip"
unzip $TMPDIR/consul-0.7.5.zip -d $GOPATH/bin
rm $TMPDIR/consul-0.7.5.zip

Unit tests

pushd api
npm install
npm test
popd

pushd servicebroker
npm install
npm test
popd

go install github.com/onsi/ginkgo/ginkgo
export DBURL=postgres://postgres@localhost/autoscaler?sslmode=disable
pushd src/autoscaler
ginkgo -r -race -randomizeAllSpecs
popd

pushd scheduler
mvn test
popd

Integration tests

pushd api
npm install
popd

pushd servicebroker
npm install
popd

pushd scheduler
mvn package -DskipTests
popd

go install github.com/onsi/ginkgo/ginkgo
export DBURL=postgres://postgres@localhost/autoscaler?sslmode=disable
ginkgo -r -race -randomizeAllSpecs src/integration

Deploy and offer Auto-Scaler as a service

Go to app-autoscaler-release project for how to BOSH deploy App-AutoScaler

Use Auto-Scaler service

Refer to user guide for the details of how to use the Auto-Scaler service, including policy definition, supported metrics, public API specification and commond line tool.

License

This project is released under version 2.0 of the Apache License.