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traffic_policy_checker.go
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traffic_policy_checker.go
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package destinationrules
import (
"github.com/kiali/kiali/kubernetes"
"github.com/kiali/kiali/models"
)
type TrafficPolicyChecker struct {
DestinationRules []kubernetes.IstioObject
MTLSDetails kubernetes.MTLSDetails
}
func (t TrafficPolicyChecker) Check() models.IstioValidations {
validations := models.IstioValidations{}
refdMtls := t.drsWithNonLocalmTLSEnabled()
// When mTLS is not enabled, there is no validation to be added.
if len(refdMtls) == 0 {
return validations
}
// Check whether DRs override mTLS.
for _, dr := range t.DestinationRules {
drSameHosts := sameHostDestinationRules(dr, refdMtls)
// Continue if there aren't DestinationRules enabling mTLS non-locally
// and pointing to same host as dr.
if len(drSameHosts) == 0 {
continue
}
// Invalid if there isn't trafficPolicy specified or trafficPolicy doesn't specify TLSSettings
if !hasTrafficPolicy(dr) || !hasTLSSettings(dr) {
check := models.Build("destinationrules.trafficpolicy.notlssettings", "spec/trafficPolicy")
key := models.BuildKey(DestinationRulesCheckerType, dr.GetObjectMeta().Name, dr.GetObjectMeta().Namespace)
refKeys := make([]models.IstioValidationKey, 0, len(refdMtls))
for _, dr := range refdMtls {
refKeys = append(refKeys, models.BuildKey(DestinationRulesCheckerType, dr.GetObjectMeta().Name, dr.GetObjectMeta().Namespace))
}
validation := buildDestinationRuleValidation(dr, check, true, refKeys)
if _, exists := validations[key]; !exists {
validations.MergeValidations(models.IstioValidations{key: validation})
}
}
}
return validations
}
func (t TrafficPolicyChecker) drsWithNonLocalmTLSEnabled() []kubernetes.IstioObject {
mtlsDrs := make([]kubernetes.IstioObject, 0)
for _, dr := range t.MTLSDetails.DestinationRules {
if host, ok := dr.GetSpec()["host"]; ok {
if dHost, ok := host.(string); ok {
fqdn := kubernetes.ParseHost(dHost, dr.GetObjectMeta().Namespace, dr.GetObjectMeta().ClusterName)
if isNonLocalmTLSForServiceEnabled(dr, fqdn.Service) {
mtlsDrs = append(mtlsDrs, dr)
}
}
}
}
return mtlsDrs
}
func sameHostDestinationRules(dr kubernetes.IstioObject, mdrs []kubernetes.IstioObject) []kubernetes.IstioObject {
var drHost kubernetes.Host
shdrs := make([]kubernetes.IstioObject, 0, len(mdrs))
if host, ok := dr.GetSpec()["host"]; ok {
if dHost, ok := host.(string); ok {
drHost = kubernetes.ParseHost(dHost, dr.GetObjectMeta().Namespace, dr.GetObjectMeta().ClusterName)
}
}
for _, mdr := range mdrs {
if host, ok := mdr.GetSpec()["host"]; ok {
if dHost, ok := host.(string); ok {
mdrHost := kubernetes.ParseHost(dHost, dr.GetObjectMeta().Namespace, dr.GetObjectMeta().ClusterName)
if mdrHost.Service == "*.local" ||
(mdrHost.Cluster == drHost.Cluster && mdrHost.Namespace == drHost.Namespace) {
shdrs = append(shdrs, mdr)
}
}
}
}
return shdrs
}
func hasTrafficPolicy(dr kubernetes.IstioObject) bool {
_, trafficPresent := dr.GetSpec()["trafficPolicy"]
return trafficPresent
}
func hasTLSSettings(dr kubernetes.IstioObject) bool {
return hasTrafficPolicyTLS(dr) || hasPortTLS(dr)
}
// hasPortTLS returns true when there is one port that specifies any TLS settings
func hasPortTLS(dr kubernetes.IstioObject) bool {
if trafficPolicy, trafficPresent := dr.GetSpec()["trafficPolicy"]; trafficPresent {
if trafficCasted, ok := trafficPolicy.(map[string]interface{}); ok {
if portsSettings, found := trafficCasted["portLevelSettings"]; found {
if portsSettingsCasted, ok := portsSettings.([]interface{}); ok {
for _, portSettings := range portsSettingsCasted {
if portSettingsCasted, ok := portSettings.(map[string]interface{}); ok {
if _, found := portSettingsCasted["tls"]; found {
return true
}
}
}
}
}
}
}
return false
}
// hasTrafficPolicyTLS returns true when there is a trafficPolicy specifying any tls mode
func hasTrafficPolicyTLS(dr kubernetes.IstioObject) bool {
if trafficPolicy, trafficPresent := dr.GetSpec()["trafficPolicy"]; trafficPresent {
if trafficCasted, ok := trafficPolicy.(map[string]interface{}); ok {
if _, found := trafficCasted["tls"]; found {
return true
}
}
}
return false
}
func buildDestinationRuleValidation(dr kubernetes.IstioObject, checks models.IstioCheck, valid bool, refKeys []models.IstioValidationKey) *models.IstioValidation {
validation := &models.IstioValidation{
Name: dr.GetObjectMeta().Name,
ObjectType: DestinationRulesCheckerType,
Valid: valid,
Checks: []*models.IstioCheck{
&checks,
},
References: refKeys,
}
return validation
}