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services.go
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services.go
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package business
import (
"sync"
"time"
apps_v1 "k8s.io/api/apps/v1"
core_v1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/labels"
"github.com/kiali/kiali/business/checkers"
"github.com/kiali/kiali/config"
"github.com/kiali/kiali/kubernetes"
"github.com/kiali/kiali/log"
"github.com/kiali/kiali/models"
"github.com/kiali/kiali/prometheus"
"github.com/kiali/kiali/prometheus/internalmetrics"
)
// SvcService deals with fetching istio/kubernetes services related content and convert to kiali model
type SvcService struct {
prom prometheus.ClientInterface
k8s kubernetes.IstioClientInterface
businessLayer *Layer
}
// GetServiceList returns a list of all services for a given Namespace
func (in *SvcService) GetServiceList(namespace string) (*models.ServiceList, error) {
var err error
promtimer := internalmetrics.GetGoFunctionMetric("business", "SvcService", "GetServiceList")
defer promtimer.ObserveNow(&err)
var svcs []core_v1.Service
var pods []core_v1.Pod
var deployments []apps_v1.Deployment
// Check if user has access to the namespace (RBAC) in cache scenarios and/or
// if namespace is accessible from Kiali (Deployment.AccessibleNamespaces)
if _, err = in.businessLayer.Namespace.GetNamespace(namespace); err != nil {
return nil, err
}
wg := sync.WaitGroup{}
wg.Add(3)
errChan := make(chan error, 2)
go func() {
defer wg.Done()
var err2 error
// Check if namespace is cached
// Namespace access is checked in the upper call
if kialiCache != nil && kialiCache.CheckNamespace(namespace) {
svcs, err2 = kialiCache.GetServices(namespace, nil)
} else {
svcs, err2 = in.k8s.GetServices(namespace, nil)
}
if err2 != nil {
log.Errorf("Error fetching Services per namespace %s: %s", namespace, err2)
errChan <- err2
}
}()
go func() {
defer wg.Done()
var err2 error
// Check if namespace is cached
// Namespace access is checked in the upper call
if kialiCache != nil && kialiCache.CheckNamespace(namespace) {
pods, err2 = kialiCache.GetPods(namespace, "")
} else {
pods, err2 = in.k8s.GetPods(namespace, "")
}
if err2 != nil {
log.Errorf("Error fetching Pods per namespace %s: %s", namespace, err2)
errChan <- err2
}
}()
go func() {
defer wg.Done()
var err error
// Check if namespace is cached
// Namespace access is checked in the upper call
if kialiCache != nil && kialiCache.CheckNamespace(namespace) {
deployments, err = kialiCache.GetDeployments(namespace)
} else {
deployments, err = in.k8s.GetDeployments(namespace)
}
if err != nil {
log.Errorf("Error fetching Deployments per namespace %s: %s", namespace, err)
errChan <- err
}
}()
wg.Wait()
if len(errChan) != 0 {
err = <-errChan
return nil, err
}
// Convert to Kiali model
return in.buildServiceList(models.Namespace{Name: namespace}, svcs, pods, deployments), nil
}
func (in *SvcService) buildServiceList(namespace models.Namespace, svcs []core_v1.Service, pods []core_v1.Pod, deployments []apps_v1.Deployment) *models.ServiceList {
services := make([]models.ServiceOverview, len(svcs))
conf := config.Get()
validations := in.getServiceValidations(svcs, deployments, pods)
// Convert each k8s service into our model
for i, item := range svcs {
sPods := kubernetes.FilterPodsForService(&item, pods)
/** Check if Service has istioSidecar deployed */
mPods := models.Pods{}
mPods.Parse(sPods)
hasSidecar := mPods.HasIstioSidecar()
/** Check if Service has the label app required by Istio */
_, appLabel := item.Spec.Selector[conf.IstioLabels.AppLabelName]
/** Check if Service has additional item icon */
services[i] = models.ServiceOverview{
Name: item.Name,
IstioSidecar: hasSidecar,
AppLabel: appLabel,
AdditionalDetailSample: models.GetFirstAdditionalIcon(conf, item.ObjectMeta.Annotations),
}
}
return &models.ServiceList{Namespace: namespace, Services: services, Validations: validations}
}
// GetService returns a single service and associated data using the interval and queryTime
func (in *SvcService) GetService(namespace, service, interval string, queryTime time.Time) (*models.ServiceDetails, error) {
var err error
promtimer := internalmetrics.GetGoFunctionMetric("business", "SvcService", "GetService")
defer promtimer.ObserveNow(&err)
// Check if user has access to the namespace (RBAC) in cache scenarios and/or
// if namespace is accessible from Kiali (Deployment.AccessibleNamespaces)
if _, err = in.businessLayer.Namespace.GetNamespace(namespace); err != nil {
return nil, err
}
svc, eps, err := in.getServiceDefinition(namespace, service)
if err != nil {
return nil, err
}
var pods []core_v1.Pod
var hth models.ServiceHealth
var vs, dr []kubernetes.IstioObject
var ws models.Workloads
var nsmtls models.MTLSStatus
conf := config.Get()
additionalDetails := models.GetAdditionalDetails(conf, svc.ObjectMeta.Annotations)
wg := sync.WaitGroup{}
wg.Add(6)
errChan := make(chan error, 6)
labelsSelector := labels.Set(svc.Spec.Selector).String()
// If service doesn't have any selector, we can't know which are the pods and workloads applying.
if labelsSelector != "" {
wg.Add(2)
go func() {
defer wg.Done()
var err2 error
// Check if namespace is cached
// Namespace access is checked in the upper caller
if kialiCache != nil && kialiCache.CheckNamespace(namespace) {
pods, err2 = kialiCache.GetPods(namespace, labelsSelector)
} else {
pods, err2 = in.k8s.GetPods(namespace, labelsSelector)
}
if err2 != nil {
errChan <- err2
}
}()
go func() {
defer wg.Done()
var err2 error
ws, err2 = fetchWorkloads(in.businessLayer, namespace, labelsSelector)
if err2 != nil {
log.Errorf("Error fetching Workloads per namespace %s and service %s: %s", namespace, service, err2)
errChan <- err2
}
}()
}
go func() {
defer wg.Done()
var err2 error
hth, err2 = in.businessLayer.Health.GetServiceHealth(namespace, service, interval, queryTime)
if err2 != nil {
errChan <- err2
}
}()
go func() {
defer wg.Done()
var err2 error
nsmtls, err2 = in.businessLayer.TLS.NamespaceWidemTLSStatus(namespace)
if err2 != nil {
errChan <- err2
}
}()
go func() {
defer wg.Done()
var err2 error
// Check if namespace is cached
// Namespace access is checked in the upper caller
if kialiCache != nil && kialiCache.CheckIstioResource(kubernetes.VirtualServiceType) && kialiCache.CheckNamespace(namespace) {
if vs, err2 = kialiCache.GetIstioResources(kubernetes.VirtualServiceType, namespace); err2 == nil {
// Cache offers a generic method to bring all resources but it needs filter on VS case
vs = kubernetes.FilterVirtualServices(vs, namespace, service)
}
} else {
vs, err2 = in.k8s.GetVirtualServices(namespace, service)
}
if err2 != nil {
errChan <- err2
}
}()
go func() {
defer wg.Done()
var err2 error
if kialiCache != nil && kialiCache.CheckIstioResource(kubernetes.DestinationRuleType) && kialiCache.CheckNamespace(namespace) {
dr, err2 = kialiCache.GetIstioResources(kubernetes.DestinationRuleType, namespace)
if err2 == nil {
dr = kubernetes.FilterDestinationRules(dr, namespace, service)
}
} else {
dr, err2 = in.k8s.GetDestinationRules(namespace, service)
}
if err2 != nil {
errChan <- err2
}
}()
var vsCreate, vsUpdate, vsDelete bool
go func() {
defer wg.Done()
vsCreate, vsUpdate, vsDelete = getPermissions(in.k8s, namespace, VirtualServices, "")
}()
var drCreate, drUpdate, drDelete bool
go func() {
defer wg.Done()
drCreate, drUpdate, drDelete = getPermissions(in.k8s, namespace, DestinationRules, "")
}()
wg.Wait()
if len(errChan) != 0 {
err = <-errChan
return nil, err
}
wo := models.WorkloadOverviews{}
for _, w := range ws {
wi := &models.WorkloadListItem{}
wi.ParseWorkload(w)
wo = append(wo, wi)
}
s := models.ServiceDetails{Workloads: wo, Health: hth, NamespaceMTLS: nsmtls, AdditionalDetails: additionalDetails}
s.SetService(svc)
s.SetPods(kubernetes.FilterPodsForEndpoints(eps, pods))
s.SetEndpoints(eps)
s.SetVirtualServices(vs, vsCreate, vsUpdate, vsDelete)
s.SetDestinationRules(dr, drCreate, drUpdate, drDelete)
return &s, nil
}
// GetServiceDefinition returns a single service definition (the service object and endpoints), no istio or runtime information
func (in *SvcService) GetServiceDefinition(namespace, service string) (*models.ServiceDetails, error) {
var err error
promtimer := internalmetrics.GetGoFunctionMetric("business", "SvcService", "GetServiceDefinition")
defer promtimer.ObserveNow(&err)
svc, eps, err := in.getServiceDefinition(namespace, service)
if err != nil {
return nil, err
}
s := models.ServiceDetails{}
s.SetService(svc)
s.SetEndpoints(eps)
return &s, nil
}
func (in *SvcService) getServiceDefinition(namespace, service string) (svc *core_v1.Service, eps *core_v1.Endpoints, err error) {
wg := sync.WaitGroup{}
wg.Add(2)
errChan := make(chan error, 2)
go func() {
defer wg.Done()
var err2 error
svc, err2 = in.k8s.GetService(namespace, service)
if err2 != nil {
log.Errorf("Error fetching definition for service [%s:%s]: %s", namespace, service, err2)
errChan <- err2
}
}()
go func() {
defer wg.Done()
var err2 error
eps, err2 = in.k8s.GetEndpoints(namespace, service)
if err2 != nil && !errors.IsNotFound(err2) {
log.Errorf("Error fetching Endpoints namespace %s and service %s: %s", namespace, service, err2)
errChan <- err2
}
}()
wg.Wait()
if len(errChan) != 0 {
err = <-errChan
return nil, nil, err
}
return svc, eps, nil
}
// GetServiceDefinitionList returns service definitions for the namespace (the service object only), no istio or runtime information
func (in *SvcService) GetServiceDefinitionList(namespace string) (*models.ServiceDefinitionList, error) {
var err error
promtimer := internalmetrics.GetGoFunctionMetric("business", "SvcService", "GetServiceDefinitionList")
defer promtimer.ObserveNow(&err)
// Check if user has access to the namespace (RBAC) in cache scenarios and/or
// if namespace is accessible from Kiali (Deployment.AccessibleNamespaces)
if _, err = in.businessLayer.Namespace.GetNamespace(namespace); err != nil {
return nil, err
}
var svcs []core_v1.Service
// Check if namespace is cached
if kialiCache != nil && kialiCache.CheckNamespace(namespace) {
svcs, err = kialiCache.GetServices(namespace, nil)
} else {
svcs, err = in.k8s.GetServices(namespace, nil)
}
if err != nil {
log.Errorf("Error fetching Service definitions for namespace %s: %s", namespace, err)
}
// Convert to Kiali model
sdl := models.ServiceDefinitionList{
Namespace: models.Namespace{Name: namespace},
ServiceDefinitions: []models.ServiceDetails{},
}
for _, svc := range svcs {
s := models.ServiceDetails{}
s.SetService(&svc)
sdl.ServiceDefinitions = append(sdl.ServiceDefinitions, s)
}
return &sdl, nil
}
func (in *SvcService) getServiceValidations(services []core_v1.Service, deployments []apps_v1.Deployment, pods []core_v1.Pod) models.IstioValidations {
validations := checkers.ServiceChecker{
Services: services,
Deployments: deployments,
Pods: pods,
}.Check()
return validations
}