elb

Documentation

Overview

Package elb provides an updater for an ELB frontend to attach nginx to.

Index

• Constants
• func FindFrontEndElbs(awsElb ELB, labelValue string) (map[string]LoadBalancerDetails, error)
• func New(region string, labelValue string, expectedNumber int, drainDelay time.Duration) (controller.Updater, error)
• type EC2Metadata
• type ELB
• type LoadBalancerDetails

Constants

const ElbTag = "sky.uk/KubernetesClusterFrontend"

ElbTag is the tag key used for identifying ELBs to attach to.

Functions

func FindFrontEndElbs

func FindFrontEndElbs(awsElb ELB, labelValue string) (map[string]LoadBalancerDetails, error)

FindFrontEndElbs finds all elbs tagged with 'sky.uk/KubernetesClusterFrontend=<labelValue>'

func New

func New(region string, labelValue string, expectedNumber int, drainDelay time.Duration) (controller.Updater, error)

New creates a new ELB frontend

Types

type EC2Metadata

type EC2Metadata interface {
	Available() bool
	Region() (string, error)
	GetInstanceIdentityDocument() (ec2metadata.EC2InstanceIdentityDocument, error)
}

EC2Metadata interface to allow mocking of the real calls to AWS

type ELB

type ELB interface {
	DescribeLoadBalancers(input *aws_elb.DescribeLoadBalancersInput) (*aws_elb.DescribeLoadBalancersOutput, error)
	DescribeTags(input *aws_elb.DescribeTagsInput) (*aws_elb.DescribeTagsOutput, error)
	RegisterInstancesWithLoadBalancer(input *aws_elb.RegisterInstancesWithLoadBalancerInput) (*aws_elb.RegisterInstancesWithLoadBalancerOutput, error)
	DeregisterInstancesFromLoadBalancer(input *aws_elb.DeregisterInstancesFromLoadBalancerInput) (*aws_elb.DeregisterInstancesFromLoadBalancerOutput, error)
}

ELB interface to allow mocking of real calls to AWS as well as cutting down the methods from the real interface to only the ones we use

type LoadBalancerDetails

type LoadBalancerDetails struct {
	Name         string
	DNSName      string
	HostedZoneID string
	Scheme       string
}

LoadBalancerDetails stores all the elb information we use.