BOSH AutoScaler with CF Plugin

Requirements

• Ruby
• Bundler
• BOSH

Getting started

# Clone the repository
git clone https://github.com/nttlabs/bosh_scaler.git
cd bosh_scaler

# Create a config file
vi ./config/sample.yml

# Install required gems
bundle install

# Run
bundle exec ./bin/scaler ./config/sample.yml

Basic Configuration

See config/sample.yml for the basic configuration.

We recommend that you should create a new BOSH user such as scaler for AutoScaler with the bosh create user command so that you can filter BOSH tasks invoked by AutoScaler.

Defining Scaling Rules

You can define scaling rules in your deployment manifests.

---
deployment: cf

jobs:
  - name: router
    instances: 1
    resource_pool: medium_z1
    templates:
      - gorouter
  - name: runner
    instances: 3
    resource_pool: large_z1
    templates:
      - dea_next
      - dea_logging_agent

...snip...

scale:
  jobs:
    - name: router                            # Job name to scale
      cooldown: 300                           # seconds
      out:                                    # Scaling-out
        limit: 10                             # maximum instances
        unit: 2                               # Adds 2 instances at every event (default: 1)
        conditions:                           # Joined with OR for scaling-out
          - class: CpuAverage                 # CPU usage average
            larger_than: 80                   # Threshold (percent)
            duration: 300                     # For calculating average
          - class: MemoryAverage              # Memory usage average
            larger_than: 90                   # Threshold (percent)
            duration: 300                     # For calculating average
      in:                                     # Scaling-in
        limit: 3                              # minimum instances
        conditions:                           # Joined with AND for scaling-in
          - class: CpuAverage                 # CPU usage average
            smaller_than: 10                  # percent
            duration: 300                     # For calculating average
          - class: MemoryAverage              # Memory usage average
            smaller_than: 20                  # Threshold (percent)
            duration: 300                     # For calculating average
    - name: runner
      cooldown: 300
      out:
        limit: 20
        conditions:
          - class: CfVarzAverage              # Cloud Foundry Metrics
            varz_job: DEA                     # varz job name
            varz_key: available_memory_ratio  # varz key name
            smaller_than: 10
            duration: 300
      in:
        limit: 3
        conditions:
          - class: CfVarzAverage
            varz_job: DEA
            varz_key: available_memory_ratio
            larger_than: 80
            duration: 300

Available conditions classes

BOSH Heartbeat

• CpuAverage
  • Average CPU percentage during duration
• MemoryAverage
  • Avarage memory percentage during duration
• LoadAverage1
  • Latest Load Average in 1 minute
• LoadAverage5
  • Latest Load Average in 5 minutes
• LoadAverage15
  • Latest Load Average in 15 minute

CF VARZ metrics

• CfVarzAverage
  • Average CF Varz value during duration

CF Plugin

BOSH AutoScaler supports input from Cloud Foundry Collector. To use the CfVarzAverage condtion in your manifest file, send metrics to yoru AutoScaler with the TSDB historian.

Sample Collector configuration with cf-release

properties:
  collector:
    use_tsdb: true
    deployment_name: cf
  opentsdb:
    address: 192.168.15.139     # your AutoScaler address
    port: 4567                  # your AutoScaler port

Web UI

BOSH AutoScaler has a Web UI on which you can confirm loaded rules and auto scaling task log. Access http://<your_ip>:8888/ on your web brower.

Contributing

Fork the repository and send a new Pull Request with your topic branch.