Nginx::Autoscale
This is a simple nginx reconfigure daemon that should be invoked using cron. This utility accepts a bunch of parameters.
The utility watches the Elastic IP address (by pinging it). If the currently associated endpoint does not respond, the utility would try to steal the elastic ip. At the same time, the utility also fetches the config files from S3 location these configuration files define the backends being served. We then update (if needed) the current configuration of the loadbalancer configuration and reload it.
Configuration files Configuration are keyed by the filename and have the following format
{
"backends": [
{"asg_name": "collector-production-v231", "host_opts": "weight=1"},
{"asg_name": "collector-production-v232", "host_opts": "weight=2"}
],
"healthcheck_path": "/private/status",
"ssl": true,
"ssl_cert": "/certs/collector.pem",
"ssl_cert_key": "/certs/collector_key.pem",
"public_dns": "metrics.brightcove.com",
"app_port": 44080,
"endpoint_matchers": ["/"]
}Monitoring can be added if needed.
Installation
Add this line to your application's Gemfile:
And then execute:
Or install it yourself as:
$ gem install nginx-autoscale
Usage
Usage:
nginx-autoscale update <options>
Options:
[--access-key=AWS access key]
[--secret-key=AWS secret key]
[--bucket=S3 bucket containing all the configurations]
[--prefix=S3 prefix to watch]
[--elastic-ip=AWS Elastic IP to watch]
[--lb-health-path=Healthcheck path for the loadbalancer] # Default: /ping
[--lb-health-port=Healthcheck port for the loadbalancer] # Default: 12198
Contributing
- Fork it
- Create your feature branch (
git checkout -b my-new-feature) - Commit your changes (
git commit -am 'Add some feature') - Push to the branch (
git push origin my-new-feature) - Create new Pull Request