Release v1.1.0

Release notes 1.1.0

What's New

• Experimental support for sdk based flow-control
• Config change for multiple underlays

SDK Flow Control

If the router being connected to supports it, the sdk can now manage flow control
instead of delegating that to the router. This is mostly important when running
multiple simultaneous circuits throught the SDK. When running multiple circuits,
a slow circuit can get stalled at the router because of flow control back-pressure.
This then back-pressures all circuits from the SDK to that router.

By moving the flow-control to the SDK, a slow circuit will not negatively impact
other circuits to the same router. This is currently enabled in the DialOptions
and ListenOptions for the dial and hosting sides respectively.

t := true
dialOptions := &ziti.DialOptions{
    ConnectTimeout: wf.ConnectTimeout,
    SdkFlowControl: &t,
}

listenOptions := ziti.DefaultListenOptions()
listenOptions.SdkFlowControl = &t

As this is an experimental feature, the configuration may change or be removed
in the future.

Config Changes

The multi-underlay configuration has changed. There are now two settings.

// If set to a number greater than one, the sdk will attempt to create multiple connections to edge routers.
// This configuration value should not be considered part of the stable API yet. It currently defaults to one,
// but it may default to a larger number at some point in the future or be removed. If set to zero, it will
// be reset to one.
MaxDefaultConnections uint32 `json:"-"`

// If set to a number greater than zero, the sdk will attempt to create one or more separate connection to
// each edge routers for control plane data, such as dials. This configuration value should not be considered
// part of the stable API yet. It currently defaults to zero, but it may default to 1 at some point in the future
// or be removed.
MaxControlConnections uint32 `json:"-"`

The old EnableSeparateControlPlaneConnection setting is gone. Set MaxControlConnections to 1 to enable
separation of control plane data.

Note that while present, the MaxDefaultConnections should not be used yet.

Issues Fixed and Dependency Updates

• github.com/openziti/sdk-golang: v1.0.2 -> v1.1.0

  • Issue #702 - [Go SDK] Support xgress flow control from the SDK

• github.com/openziti/channel/v4: v4.0.4 -> v4.0.6

  • Issue #182 - MultiListener can deadlock
  • Issue #180 - Add GetUserData to Channel interface

• github.com/openziti/identity: v1.0.100 -> v1.0.101

  • Issue #64 - Support a way to check if a cert/serverCert can be saved