forked from docker/libcompose
/
project_scale.go
40 lines (32 loc) · 991 Bytes
/
project_scale.go
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package project
import (
"fmt"
"golang.org/x/net/context"
log "github.com/Sirupsen/logrus"
)
// Scale scales the specified services.
func (p *Project) Scale(ctx context.Context, timeout int, servicesScale map[string]int) error {
// This code is a bit verbose but I wanted to parse everything up front
order := make([]string, 0, 0)
services := make(map[string]Service)
for name := range servicesScale {
if !p.ServiceConfigs.Has(name) {
return fmt.Errorf("%s is not defined in the template", name)
}
service, err := p.CreateService(name)
if err != nil {
return fmt.Errorf("Failed to lookup service: %s: %v", service, err)
}
order = append(order, name)
services[name] = service
}
for _, name := range order {
scale := servicesScale[name]
log.Infof("Setting scale %s=%d...", name, scale)
err := services[name].Scale(ctx, scale, timeout)
if err != nil {
return fmt.Errorf("Failed to set the scale %s=%d: %v", name, scale, err)
}
}
return nil
}