utils

Documentation

Index

• func HAProxyCommand(socket string, observer func(duration time.Duration), command ...string) ([]string, error)
• type Proc
• type ProcTable
  • func HAProxyProcs(masterSocket string) (*ProcTable, error)

Functions

func HAProxyCommand

func HAProxyCommand(socket string, observer func(duration time.Duration), command ...string) ([]string, error)

HAProxyCommand ...

Types

type Proc

type Proc struct {
	Type    string
	PID     int
	RPID    int
	Reloads int
}

Proc ...

type ProcTable

type ProcTable struct {
	Master     Proc
	Workers    []Proc
	OldWorkers []Proc
}

ProcTable ...

func HAProxyProcs

func HAProxyProcs(masterSocket string) (*ProcTable, error)

HAProxyProcs reads and converts `show proc` from the master CLI to a ProcTable instance. Waits for the reload to complete while master CLI is down and the attempt to connect leads to a connection refused. Some context: https://www.mail-archive.com/haproxy@formilux.org/msg38415.html The amount of time between attempts increases exponentially between 1ms and 64ms, and aritmetically betweem 128ms and 1s in order to save CPU on long reload events and quit fast on the fastest ones. The whole processing time can be calculated by the caller as the haproxy reload time.