/
services.go
73 lines (59 loc) · 1.92 KB
/
services.go
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package clusterf
import (
"fmt"
"github.com/qmsk/clusterf/config"
"github.com/qmsk/clusterf/ipvs"
)
type Services map[string]Service
// Lookup or initialize ipvsService from a kernel ipvs.Service
func (services Services) get(ipvsService ipvs.Service) Service {
if service, exists := services[ipvsService.String()]; exists {
return service
} else {
service := Service{
Service: ipvsService,
dests: make(ServiceDests),
}
services[service.String()] = service
return service
}
}
func (services Services) sync(ipvsService ipvs.Service, ipvsDests []ipvs.Dest) {
// for side-effect
service := services.get(ipvsService)
for _, ipvsDest := range ipvsDests {
service.dests.sync(ipvsDest)
}
}
func (services Services) config(ipvsService ipvs.Service, dests ServiceDests) {
services[ipvsService.String()] = Service{
Service: ipvsService,
dests: dests,
}
}
// Build a new services state from Config
func configServices(configServices map[string]config.Service, routes Routes, options IPVSOptions) (Services, error) {
services := make(Services)
for serviceName, configService := range configServices {
for _, ipvsType := range ipvsTypes {
if ipvsService, err := configServiceFrontend(ipvsType, configService.Frontend, options); err != nil {
return nil, fmt.Errorf("Invalid config for service %v: %v", serviceName, err)
} else if ipvsService != nil {
dests := make(ServiceDests)
for backendName, configBackend := range configService.Backends {
if ipvsDest, err := configServiceBackend(*ipvsService, configBackend, routes, options); err != nil {
return nil, fmt.Errorf("Invalid config for service %v backend %v: %v", serviceName, backendName, err)
} else if ipvsDest != nil {
dests.config(*ipvsDest)
}
}
if len(dests) == 0 && options.Elide {
// elide empty services
continue
}
services.config(*ipvsService, dests)
}
}
}
return services, nil
}