// Scale grows or shrinks the number of running components.
// Currently "router", "registry" and "store-gateway" are the only types that can be scaled.
func Scale(targets []string, b backend.Backend) error {
var wg sync.WaitGroup
for _, target := range targets {
component, num, err := splitScaleTarget(target)
if err != nil {
return err
}
// the router, registry, and store-gateway are the only component that can scale at the moment
if !strings.Contains(component, "router") && !strings.Contains(component, "registry") && !strings.Contains(component, "store-gateway") {
return fmt.Errorf("cannot scale %s component", component)
}
b.Scale(component, num, &wg, Stdout, Stderr)
wg.Wait()
}
return nil
}
// Scale grows or shrinks the number of running components.
// Currently "router", "registry" and "store-gateway" are the only types that can be scaled.
func Scale(targets []string, b backend.Backend) error {
outchan := make(chan string)
errchan := make(chan error)
var wg sync.WaitGroup
go printState(outchan, errchan, 500*time.Millisecond)
for _, target := range targets {
component, num, err := splitScaleTarget(target)
if err != nil {
return err
}
// the router, registry, and store-gateway are the only component that can scale at the moment
if !strings.Contains(component, "router") && !strings.Contains(component, "registry") && !strings.Contains(component, "store-gateway") {
return fmt.Errorf("cannot scale %s component", component)
}
b.Scale(component, num, &wg, outchan, errchan)
wg.Wait()
}
close(outchan)
close(errchan)
return nil
}
// Scale grows or shrinks the number of running components.
// Currently "router" is the only type that can be scaled.
func Scale(argv []string, b backend.Backend) error {
usage := `Grows or shrinks the number of running components.
Currently "router" is the only type that can be scaled.
Usage:
deisctl scale [<target>...] [options]
`
// parse command-line arguments
args, err := docopt.Parse(usage, argv, true, "", false)
if err != nil {
return err
}
targets := args["<target>"].([]string)
outchan := make(chan string)
errchan := make(chan error)
var wg sync.WaitGroup
go printState(outchan, errchan, 500*time.Millisecond)
for _, target := range targets {
component, num, err := splitScaleTarget(target)
if err != nil {
return err
}
// the router is the only component that can scale at the moment
if !strings.Contains(component, "router") {
return fmt.Errorf("cannot scale %s components", component)
}
b.Scale(component, num, &wg, outchan, errchan)
wg.Wait()
}
close(outchan)
return nil
}
