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virtualservice.go
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virtualservice.go
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package istio
import (
"net"
dtclient "github.com/Dynatrace/dynatrace-operator/pkg/clients/dynatrace"
istio "istio.io/api/networking/v1beta1"
istiov1beta1 "istio.io/client-go/pkg/apis/networking/v1beta1"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
)
const (
protocolHttp = "http"
protocolHttps = "https"
)
func buildVirtualService(meta metav1.ObjectMeta, commHosts []dtclient.CommunicationHost) *istiov1beta1.VirtualService {
var nonIPhosts []dtclient.CommunicationHost
for _, commHost := range commHosts {
if !isIp(commHost.Host) {
nonIPhosts = append(nonIPhosts, commHost)
}
}
if len(nonIPhosts) == 0 {
return nil
}
return &istiov1beta1.VirtualService{
ObjectMeta: meta,
Spec: buildVirtualServiceSpec(nonIPhosts),
}
}
func buildVirtualServiceSpec(commHosts []dtclient.CommunicationHost) istio.VirtualService {
hosts := make([]string, len(commHosts))
var (
tlses []*istio.TLSRoute
routes []*istio.HTTPRoute
)
for i, commHost := range commHosts {
hosts[i] = commHost.Host
switch commHost.Protocol {
case protocolHttps:
tlses = append(tlses, buildVirtualServiceTLSRoute(commHost.Host, commHost.Port))
case protocolHttp:
routes = append(routes, buildVirtualServiceHttpRoute(commHost.Host, commHost.Port))
}
}
return istio.VirtualService{
Hosts: hosts,
Http: routes,
Tls: tlses,
}
}
func buildVirtualServiceHttpRoute(host string, port uint32) *istio.HTTPRoute {
return &istio.HTTPRoute{
Match: []*istio.HTTPMatchRequest{{
Port: port,
}},
Route: []*istio.HTTPRouteDestination{{
Destination: &istio.Destination{
Host: host,
Port: &istio.PortSelector{
Number: port,
},
},
}},
}
}
func buildVirtualServiceTLSRoute(host string, port uint32) *istio.TLSRoute {
return &istio.TLSRoute{
Match: []*istio.TLSMatchAttributes{{
SniHosts: []string{host},
Port: port,
}},
Route: []*istio.RouteDestination{{
Destination: &istio.Destination{
Host: host,
Port: &istio.PortSelector{
Number: port,
},
},
}},
}
}
func isIp(host string) bool {
return net.ParseIP(host) != nil
}