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xsite.go
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xsite.go
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package infinispan
import (
"context"
"fmt"
"net"
"net/url"
"github.com/go-logr/logr"
ispnv1 "github.com/infinispan/infinispan-operator/pkg/apis/infinispan/v1"
consts "github.com/infinispan/infinispan-operator/pkg/controller/constants"
ispn "github.com/infinispan/infinispan-operator/pkg/infinispan"
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/labels"
"k8s.io/apimachinery/pkg/selection"
"k8s.io/apimachinery/pkg/types"
restclient "k8s.io/client-go/rest"
"sigs.k8s.io/controller-runtime/pkg/client"
)
// ComputeXSite compute the xsite struct for cross site function
func ComputeXSite(infinispan *ispnv1.Infinispan, kubernetes *kube.Kubernetes, service *corev1.Service, logger logr.Logger, xsite *config.XSite) error {
if infinispan.HasSites() {
siteServiceName := infinispan.GetSiteServiceName()
localSiteHost, localSitePort, err := getCrossSiteServiceHostPort(service, kubernetes, logger)
if err != nil {
logger.Error(err, "error retrieving local x-site service information")
return err
}
if localSiteHost == "" {
msg := "local x-site service host not yet available"
logger.Info(msg)
return fmt.Errorf(msg)
}
logger.Info("local site service",
"service name", siteServiceName,
"host", localSiteHost,
"port", localSitePort,
)
xsite.Address = localSiteHost
xsite.Name = infinispan.Spec.Service.Sites.Local.Name
xsite.Port = localSitePort
remoteLocations := findRemoteLocations(xsite.Name, infinispan)
for _, remoteLocation := range remoteLocations {
err := appendRemoteLocation(infinispan, &remoteLocation, kubernetes, logger, xsite)
if err != nil {
return err
}
}
logger.Info("x-site configured", "configuration", xsite)
}
return nil
}
func applyLabelsToCoordinatorsPod(podList *corev1.PodList, cluster ispn.ClusterInterface, client client.Client, logger logr.Logger) bool {
coordinatorFound := false
for _, item := range podList.Items {
cacheManagerInfo, err := cluster.GetCacheManagerInfo(consts.DefaultCacheManagerName, item.Name)
if err == nil {
lab, ok := item.Labels["coordinator"]
if cacheManagerInfo["coordinator"].(bool) {
if !ok || lab != "true" {
item.Labels["coordinator"] = "true"
err = client.Update(context.TODO(), &item)
}
coordinatorFound = (err == nil)
} else {
if ok && lab == "true" {
// If present leave the label but false the value
if ok {
item.Labels["coordinator"] = "false"
err = client.Update(context.TODO(), &item)
}
}
}
}
if err != nil {
logger.Error(err, "Generic error in managing x-site coordinators")
}
}
return coordinatorFound
}
func appendRemoteLocation(infinispan *ispnv1.Infinispan, remoteLocation *ispnv1.InfinispanSiteLocationSpec, kubernetes *kube.Kubernetes,
logger logr.Logger, xsite *config.XSite) error {
restConfig, err := getRemoteSiteRESTConfig(infinispan, 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
}
err = appendKubernetesRemoteLocation(infinispan, remoteLocation, remoteKubernetes, logger, xsite)
if err != nil {
return err
}
return nil
}
func appendKubernetesRemoteLocation(infinispan *ispnv1.Infinispan, remoteLocation *ispnv1.InfinispanSiteLocationSpec,
remoteKubernetes *kube.Kubernetes, logger logr.Logger, xsite *config.XSite) error {
siteServiceName := infinispan.GetSiteServiceName()
namespacedName := types.NamespacedName{Name: siteServiceName, Namespace: infinispan.Namespace}
siteService := &corev1.Service{}
err := remoteKubernetes.Client.Get(context.TODO(), namespacedName, siteService)
if err != nil {
logger.Error(err, "could not find x-site service in remote cluster", "site service name", siteServiceName)
return err
}
host, port, err := getCrossSiteServiceHostPort(siteService, remoteKubernetes, logger)
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", siteServiceName,
"host", host,
"port", port,
)
backupSite := config.BackupSite{
Address: host,
Name: remoteLocation.Name,
Port: port,
}
xsite.Backups = append(xsite.Backups, backupSite)
return nil
}
func getCrossSiteServiceHostPort(service *corev1.Service, kubernetes *kube.Kubernetes, logger logr.Logger) (string, int32, error) {
switch serviceType := service.Spec.Type; serviceType {
case corev1.ServiceTypeNodePort:
// If configuring NodePort, expect external IPs to be configured
return GetNodePortServiceHostPort(service.Spec.Ports[0].NodePort, kubernetes, logger)
case corev1.ServiceTypeLoadBalancer:
return getLoadBalancerServiceHostPort(service, logger)
default:
return "", 0, fmt.Errorf("unsupported service type '%v'", serviceType)
}
}
func GetNodePortServiceHostPort(nodePort int32, k *kube.Kubernetes, logger logr.Logger) (string, int32, error) {
//The IPs must be fetch. Some cases, the API server (which handles REST requests) isn't the same as the worker
//So, we get the workers list. It needs some permissions cluster-reader permission
//oc create clusterrolebinding <name> -n ${NAMESPACE} --clusterrole=cluster-reader --serviceaccount=${NAMESPACE}:<account-name>
workerList := &corev1.NodeList{}
//select workers first
req, err := labels.NewRequirement("node-role.kubernetes.io/worker", selection.Exists, nil)
if err != nil {
return "", 0, err
}
listOps := &client.ListOptions{
LabelSelector: labels.NewSelector().Add(*req),
}
err = k.Client.List(context.TODO(), workerList, listOps)
if err != nil || len(workerList.Items) == 0 {
// Fallback selecting everything
err = k.Client.List(context.TODO(), workerList, &client.ListOptions{})
if err != nil {
return "", 0, err
}
}
for _, node := range workerList.Items {
//host := k.PublicIP() //returns REST API endpoint. not good.
//iterate over the all the nodes and return the first ready.
nodeStatus := node.Status
for _, nodeCondition := range nodeStatus.Conditions {
if nodeCondition.Type == corev1.NodeReady && nodeCondition.Status == corev1.ConditionTrue && len(nodeStatus.Addresses) > 0 {
//The port can be found in the service description
host := nodeStatus.Addresses[0].Address
port := nodePort
logger.Info("Found ready worker node.", "Host", host, "Port", port)
return host, port, nil
}
}
}
err = fmt.Errorf("no worker node found")
return "", 0, err
}
func getLoadBalancerServiceHostPort(service *corev1.Service, logger logr.Logger) (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
}
}
return "", port, nil
}
func getRemoteSiteRESTConfig(infinispan *ispnv1.Infinispan, 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"
namespace := infinispan.Namespace
switch scheme := backupSiteURL.Scheme; scheme {
case "minikube":
return kubernetes.GetMinikubeRESTConfig(copyURL.String(), location.SecretName, namespace, logger)
case "openshift":
return kubernetes.GetOpenShiftRESTConfig(copyURL.String(), location.SecretName, namespace, logger)
default:
return nil, fmt.Errorf("backup site URL scheme '%s' not supported", scheme)
}
}
func findRemoteLocations(localSiteName string, infinispan *ispnv1.Infinispan) (remoteLocations []ispnv1.InfinispanSiteLocationSpec) {
locations := infinispan.Spec.Service.Sites.Locations
for _, location := range locations {
if localSiteName != location.Name {
remoteLocations = append(remoteLocations, location)
}
}
return
}
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
}