loadbalancer

Documentation

Index

• Constants
• Variables
• func ResetLoadBalancer(dataDir, serviceName string) error
• func SetHTTPProxy(address string) error
• type LoadBalancer
  • func New(ctx context.Context, dataDir, serviceName, serverURL string, lbServerPort int, ...) (_lb *LoadBalancer, _err error)
  • func (lb *LoadBalancer) LoadBalancerServerURL() string
  • func (lb *LoadBalancer) SetDefault(serverAddress string)
  • func (lb *LoadBalancer) SetHealthCheck(address string, healthCheck func() bool)
  • func (lb *LoadBalancer) Update(serverAddresses []string)

Constants

const RandomPort = 0

Variables

var (
	SupervisorServiceName = version.Program + "-agent-load-balancer"
	APIServerServiceName  = version.Program + "-api-server-agent-load-balancer"
	ETCDServerServiceName = version.Program + "-etcd-server-load-balancer"
)

Functions

func ResetLoadBalancer

func ResetLoadBalancer(dataDir, serviceName string) error

ResetLoadBalancer will delete the local state file for the load balancer on disk

func SetHTTPProxy

func SetHTTPProxy(address string) error

SetHTTPProxy configures a proxy-enabled dialer to be used for all loadbalancer connections, if the agent has been configured to allow use of a HTTP proxy, and the environment has been configured to indicate use of a HTTP proxy for the server URL.

Types

type LoadBalancer

type LoadBalancer struct {
	ServerURL       string
	ServerAddresses []string

	Listener net.Listener
	// contains filtered or unexported fields
}

LoadBalancer holds data for a local listener which forwards connections to a pool of remote servers. It is not a proper load-balancer in that it does not actually balance connections, but instead fails over to a new server only when a connection attempt to the currently selected server fails.

func New

func New(ctx context.Context, dataDir, serviceName, serverURL string, lbServerPort int, isIPv6 bool) (_lb *LoadBalancer, _err error)

New contstructs a new LoadBalancer instance. The default server URL, and currently active servers, are stored in a file within the dataDir.

func (*LoadBalancer) LoadBalancerServerURL

func (lb *LoadBalancer) LoadBalancerServerURL() string

func (*LoadBalancer) SetDefault

func (lb *LoadBalancer) SetDefault(serverAddress string)

SetDefault sets the selected address as the default / fallback address

func (*LoadBalancer) SetHealthCheck

func (lb *LoadBalancer) SetHealthCheck(address string, healthCheck func() bool)

SetHealthCheck adds a health-check callback to an address, replacing the default no-op function.

func (*LoadBalancer) Update

func (lb *LoadBalancer) Update(serverAddresses []string)