/
xsite.go
221 lines (190 loc) · 8.26 KB
/
xsite.go
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package config
import (
"context"
"fmt"
"net"
"net/url"
"strconv"
"github.com/go-logr/logr"
ispnv1 "github.com/infinispan/infinispan-operator/pkg/apis/infinispan/v1"
consts "github.com/infinispan/infinispan-operator/pkg/controller/constants"
config "github.com/infinispan/infinispan-operator/pkg/infinispan/configuration"
kube "github.com/infinispan/infinispan-operator/pkg/kubernetes"
corev1 "k8s.io/api/core/v1"
"k8s.io/apimachinery/pkg/types"
restclient "k8s.io/client-go/rest"
"k8s.io/client-go/tools/record"
"k8s.io/cloud-provider/service/helpers"
)
const (
SchemeTypeKubernetes = "kubernetes"
SchemeTypeMinikube = "minikube"
SchemeTypeOpenShift = "openshift"
XSiteLocalServiceTypeUnsupported = "XSiteLocalServiceUnsupported"
XSiteRemoteServiceTypeUnsupported = "XSiteRemoteServiceUnsupported"
)
// ComputeXSite compute the xsite struct for cross site function
func ComputeXSite(infinispan *ispnv1.Infinispan, kubernetes *kube.Kubernetes, service *corev1.Service, logger logr.Logger, eventRec record.EventRecorder) (*config.XSite, error) {
siteServiceName := infinispan.GetSiteServiceName()
localSiteHost, localSitePort, err := getCrossSiteServiceHostPort(service, kubernetes, logger, eventRec, XSiteLocalServiceTypeUnsupported)
if err != nil {
logger.Error(err, "error retrieving local x-site service information")
return nil, err
}
if localSiteHost == "" {
msg := "local x-site service host not yet available"
logger.Info(msg)
return nil, fmt.Errorf(msg)
}
logger.Info("local site service", "service name", siteServiceName, "host", localSiteHost, "port", localSitePort)
xsite := &config.XSite{
Address: localSiteHost,
Name: infinispan.Spec.Service.Sites.Local.Name,
Port: localSitePort,
}
for _, remoteLocation := range infinispan.GetRemoteSiteLocations() {
backupSiteURL, err := url.Parse(remoteLocation.URL)
if err != nil {
return nil, err
}
if backupSiteURL.Scheme == "" || (backupSiteURL.Scheme == consts.StaticCrossSiteUriSchema && backupSiteURL.Hostname() == "") {
// No static location provided. Try to resolve internal cluster service
if infinispan.GetRemoteSiteClusterName(remoteLocation.Name) == infinispan.Name && infinispan.GetRemoteSiteNamespace(remoteLocation.Name) == infinispan.Namespace {
return nil, fmt.Errorf("unable to link the cross-site service with itself. clusterName '%s' or namespace '%s' for remote location '%s' should be different from the original cluster name or namespace",
infinispan.GetRemoteSiteClusterName(remoteLocation.Name), infinispan.GetRemoteSiteNamespace(remoteLocation.Name), remoteLocation.Name)
}
// Add cross-site FQN service name inside the same k8s cluster
appendBackupSite(remoteLocation.Name, infinispan.GetRemoteSiteServiceFQN(remoteLocation.Name), 0, xsite)
} else if backupSiteURL.Scheme == consts.StaticCrossSiteUriSchema {
port, _ := strconv.ParseInt(backupSiteURL.Port(), 10, 32)
appendBackupSite(remoteLocation.Name, backupSiteURL.Hostname(), int32(port), xsite)
} else {
// lookup remote service via kubernetes API
if err = appendRemoteLocation(infinispan, &remoteLocation, kubernetes, logger, eventRec, xsite); err != nil {
return nil, err
}
}
}
logger.Info("x-site configured", "configuration", xsite)
return xsite, nil
}
func appendRemoteLocation(infinispan *ispnv1.Infinispan, remoteLocation *ispnv1.InfinispanSiteLocationSpec, kubernetes *kube.Kubernetes,
logger logr.Logger, eventRec record.EventRecorder, xsite *config.XSite) error {
restConfig, err := getRemoteSiteRESTConfig(infinispan.Namespace, remoteLocation, kubernetes, logger)
if err != nil {
return err
}
remoteKubernetes, err := kube.NewKubernetesFromConfig(restConfig)
if err != nil {
logger.Error(err, "could not connect to remote location URL", "URL", remoteLocation.URL)
return err
}
if err = appendKubernetesRemoteLocation(infinispan, remoteLocation.Name, remoteKubernetes, logger, eventRec, xsite); err != nil {
return err
}
return nil
}
func appendKubernetesRemoteLocation(infinispan *ispnv1.Infinispan, remoteLocationName string, remoteKubernetes *kube.Kubernetes, logger logr.Logger, eventRec record.EventRecorder, xsite *config.XSite) error {
remoteNamespace := infinispan.GetRemoteSiteNamespace(remoteLocationName)
remoteServiceName := infinispan.GetRemoteSiteServiceName(remoteLocationName)
siteService := &corev1.Service{}
err := remoteKubernetes.Client.Get(context.TODO(), types.NamespacedName{Name: remoteServiceName, Namespace: remoteNamespace}, siteService)
if err != nil {
logger.Error(err, "could not get x-site service in remote cluster", "site service name", remoteServiceName, "site namespace", remoteNamespace)
return err
}
host, port, err := getCrossSiteServiceHostPort(siteService, remoteKubernetes, logger, eventRec, XSiteRemoteServiceTypeUnsupported)
if err != nil {
logger.Error(err, "error retrieving remote x-site service information")
return err
}
if host == "" {
msg := "remote x-site service host not yet available"
logger.Info(msg)
return fmt.Errorf(msg)
}
logger.Info("remote site service", "service name", remoteServiceName, "host", host, "port", port)
appendBackupSite(remoteLocationName, host, port, xsite)
return nil
}
func appendBackupSite(name, host string, port int32, xsite *config.XSite) {
if port == 0 {
port = consts.CrossSitePort
}
backupSite := config.BackupSite{
Address: host,
Name: name,
Port: port,
}
xsite.Backups = append(xsite.Backups, backupSite)
}
func getCrossSiteServiceHostPort(service *corev1.Service, kubernetes *kube.Kubernetes, logger logr.Logger, eventRec record.EventRecorder, reason string) (string, int32, error) {
switch serviceType := service.Spec.Type; serviceType {
case corev1.ServiceTypeNodePort:
// If configuring NodePort, expect external IPs to be configured
nodePort := service.Spec.Ports[0].NodePort
nodeHost, err := kubernetes.GetNodeHost(logger)
return nodeHost, nodePort, err
case corev1.ServiceTypeLoadBalancer:
return getLoadBalancerServiceHostPort(service, logger, eventRec, reason)
case corev1.ServiceTypeClusterIP:
return service.Name, service.Spec.Ports[0].Port, nil
default:
return "", 0, fmt.Errorf("unsupported service type '%v'", serviceType)
}
}
func getLoadBalancerServiceHostPort(service *corev1.Service, logger logr.Logger, eventRec record.EventRecorder, reason string) (string, int32, error) {
port := service.Spec.Ports[0].Port
// If configuring load balancer, look for external ingress
if len(service.Status.LoadBalancer.Ingress) > 0 {
ingress := service.Status.LoadBalancer.Ingress[0]
if ingress.IP != "" {
return ingress.IP, port, nil
}
if ingress.Hostname != "" {
// Resolve load balancer host
ip, err := lookupHost(ingress.Hostname, logger)
// Load balancer gets created asynchronously,
// so it might take time for the status to be updated.
return ip, port, err
}
}
if !helpers.HasLBFinalizer(service) {
errMsg := "LoadBalancer expose type is not supported on the target platform for x-site"
if eventRec != nil {
eventRec.Event(service, corev1.EventTypeWarning, reason, errMsg)
}
return "", port, fmt.Errorf(errMsg)
}
return "", port, nil
}
func getRemoteSiteRESTConfig(namespace string, location *ispnv1.InfinispanSiteLocationSpec, kubernetes *kube.Kubernetes, logger logr.Logger) (*restclient.Config, error) {
backupSiteURL, err := url.Parse(location.URL)
if err != nil {
return nil, err
}
// Copy URL to make modify it for backup access
copyURL, err := url.Parse(backupSiteURL.String())
if err != nil {
return nil, err
}
// All remote sites locations are accessed via encrypted http
copyURL.Scheme = "https"
switch scheme := backupSiteURL.Scheme; scheme {
case SchemeTypeKubernetes, SchemeTypeMinikube:
return kubernetes.GetKubernetesRESTConfig(copyURL.String(), location.SecretName, namespace, logger)
case SchemeTypeOpenShift:
return kubernetes.GetOpenShiftRESTConfig(copyURL.String(), location.SecretName, namespace, logger)
default:
return nil, fmt.Errorf("backup site URL scheme '%s' not supported for remote connection", scheme)
}
}
func lookupHost(host string, logger logr.Logger) (string, error) {
addresses, err := net.LookupHost(host)
if err != nil {
logger.Error(err, "host does not resolve")
return "", err
}
logger.Info("host resolved", "host", host, "addresses", addresses)
return host, nil
}