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clusterHandler.go
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clusterHandler.go
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package monitoring
import (
"encoding/json"
"fmt"
"reflect"
"sort"
"strings"
"github.com/pkg/errors"
kcluster "github.com/rancher/kontainer-engine/cluster"
"github.com/rancher/rancher/pkg/controllers/user/nslabels"
"github.com/rancher/rancher/pkg/monitoring"
"github.com/rancher/rancher/pkg/node"
"github.com/rancher/rancher/pkg/ref"
"github.com/rancher/rancher/pkg/settings"
"github.com/rancher/rke/pki"
corev1 "github.com/rancher/types/apis/core/v1"
mgmtv3 "github.com/rancher/types/apis/management.cattle.io/v3"
"github.com/rancher/types/apis/project.cattle.io/v3"
k8scorev1 "k8s.io/api/core/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
)
const (
exporterEtcdCertName = "exporter-etcd-cert"
etcd = "etcd"
controlplane = "controlplane"
)
type etcdTLSConfig struct {
certPath string
keyPath string
internalAddress string
}
type clusterHandler struct {
clusterName string
cattleClustersClient mgmtv3.ClusterInterface
agentEndpointsLister corev1.EndpointsLister
app *appHandler
}
func (ch *clusterHandler) sync(key string, cluster *mgmtv3.Cluster) (runtime.Object, error) {
if cluster == nil || cluster.DeletionTimestamp != nil || cluster.Name != ch.clusterName {
return cluster, nil
}
if !mgmtv3.ClusterConditionAgentDeployed.IsTrue(cluster) {
return cluster, nil
}
clusterTag := getClusterTag(cluster)
src := cluster
cpy := src.DeepCopy()
err := ch.doSync(cpy)
if !reflect.DeepEqual(cpy, src) {
updated, updateErr := ch.cattleClustersClient.Update(cpy)
if updateErr != nil {
return updated, errors.Wrapf(updateErr, "failed to update Cluster %s", clusterTag)
}
cpy = updated
}
return cpy, err
}
func (ch *clusterHandler) doSync(cluster *mgmtv3.Cluster) error {
appName, appTargetNamespace := monitoring.ClusterMonitoringInfo()
if cluster.Spec.EnableClusterMonitoring {
appProjectName, err := ch.ensureAppProjectName(cluster.Name, appTargetNamespace)
if err != nil {
mgmtv3.ClusterConditionMonitoringEnabled.Unknown(cluster)
mgmtv3.ClusterConditionMonitoringEnabled.Message(cluster, err.Error())
return errors.Wrap(err, "failed to ensure monitoring project name")
}
var etcdTLSConfigs []*etcdTLSConfig
var systemComponentMap map[string][]string
if isRkeCluster(cluster) {
if etcdTLSConfigs, err = ch.deployEtcdCert(cluster.Name, appTargetNamespace); err != nil {
mgmtv3.ClusterConditionMonitoringEnabled.Unknown(cluster)
mgmtv3.ClusterConditionMonitoringEnabled.Message(cluster, err.Error())
return errors.Wrap(err, "failed to deploy etcd cert")
}
if systemComponentMap, err = ch.getExporterEndpoint(); err != nil {
mgmtv3.ClusterConditionMonitoringEnabled.Unknown(cluster)
mgmtv3.ClusterConditionMonitoringEnabled.Message(cluster, err.Error())
return errors.Wrap(err, "failed to get exporter endpoint")
}
}
_, err = ch.deployApp(appName, appTargetNamespace, appProjectName, cluster, etcdTLSConfigs, systemComponentMap)
if err != nil {
mgmtv3.ClusterConditionMonitoringEnabled.Unknown(cluster)
mgmtv3.ClusterConditionMonitoringEnabled.Message(cluster, err.Error())
return errors.Wrap(err, "failed to deploy monitoring")
}
isReady, err := ch.isPrometheusReady(cluster)
if err != nil {
mgmtv3.ClusterConditionMonitoringEnabled.Unknown(cluster)
mgmtv3.ClusterConditionMonitoringEnabled.Message(cluster, err.Error())
return err
}
if !isReady {
mgmtv3.ClusterConditionMonitoringEnabled.Unknown(cluster)
mgmtv3.ClusterConditionMonitoringEnabled.Message(cluster, "prometheus is not ready")
return nil
}
if cluster.Status.MonitoringStatus == nil {
cluster.Status.MonitoringStatus = &mgmtv3.MonitoringStatus{
GrafanaEndpoint: fmt.Sprintf("/k8s/clusters/%s/api/v1/namespaces/%s/services/http:access-grafana:80/proxy/", cluster.Name, appTargetNamespace),
}
}
_, err = ConditionMetricExpressionDeployed.DoUntilTrue(cluster.Status.MonitoringStatus, func() (status *mgmtv3.MonitoringStatus, e error) {
return status, ch.deployMetrics(cluster)
})
if err != nil {
mgmtv3.ClusterConditionMonitoringEnabled.Unknown(cluster)
mgmtv3.ClusterConditionMonitoringEnabled.Message(cluster, err.Error())
return errors.Wrap(err, "failed to deploy monitoring metrics")
}
mgmtv3.ClusterConditionMonitoringEnabled.True(cluster)
mgmtv3.ClusterConditionMonitoringEnabled.Message(cluster, "")
} else if cluster.Status.MonitoringStatus != nil {
if err := ch.app.withdrawApp(cluster.Name, appName, appTargetNamespace); err != nil {
mgmtv3.ClusterConditionMonitoringEnabled.Unknown(cluster)
mgmtv3.ClusterConditionMonitoringEnabled.Message(cluster, err.Error())
return errors.Wrap(err, "failed to withdraw monitoring")
}
if err := ch.withdrawMetrics(cluster); err != nil {
mgmtv3.ClusterConditionMonitoringEnabled.Unknown(cluster)
mgmtv3.ClusterConditionMonitoringEnabled.Message(cluster, err.Error())
return errors.Wrap(err, "failed to withdraw monitoring metrics")
}
mgmtv3.ClusterConditionMonitoringEnabled.False(cluster)
mgmtv3.ClusterConditionMonitoringEnabled.Message(cluster, "")
cluster.Status.MonitoringStatus = nil
}
return nil
}
func (ch *clusterHandler) ensureAppProjectName(clusterID, appTargetNamespace string) (string, error) {
appDeployProjectID, err := monitoring.GetSystemProjectID(ch.app.cattleProjectClient)
if err != nil {
return "", err
}
appProjectName, err := monitoring.EnsureAppProjectName(ch.app.agentNamespaceClient, appDeployProjectID, clusterID, appTargetNamespace)
if err != nil {
return "", err
}
return appProjectName, nil
}
func (ch *clusterHandler) deployEtcdCert(clusterName, appTargetNamespace string) ([]*etcdTLSConfig, error) {
var etcdTLSConfigs []*etcdTLSConfig
rkeCertSecretName := "c-" + clusterName
systemNamespace := "cattle-system"
sec, err := ch.app.cattleSecretClient.GetNamespaced(systemNamespace, rkeCertSecretName, metav1.GetOptions{})
if err != nil {
return nil, errors.Wrapf(err, "failed to get %s:%s in deploy etcd cert to prometheus", systemNamespace, rkeCertSecretName)
}
var data kcluster.Cluster
if err = json.Unmarshal(sec.Data["cluster"], &data); err != nil {
return nil, errors.Wrapf(err, "failed to decode secret %s:%s to get etcd cert", systemNamespace, rkeCertSecretName)
}
crts := make(map[string]map[string]string)
if err = json.Unmarshal([]byte(data.Metadata["Certs"]), &crts); err != nil {
return nil, errors.Wrapf(err, "failed to decode secret %s:%s cert data to get etcd cert", systemNamespace, rkeCertSecretName)
}
secretData := make(map[string][]byte)
for k, v := range crts {
if strings.HasPrefix(k, pki.EtcdCertName) {
certName := getCertName(k)
keyName := getKeyName(k)
tlsConfig := etcdTLSConfig{
internalAddress: k,
certPath: getSecretPath(exporterEtcdCertName, certName),
keyPath: getSecretPath(exporterEtcdCertName, keyName),
}
etcdTLSConfigs = append(etcdTLSConfigs, &tlsConfig)
secretData[certName] = []byte(v["CertPEM"])
secretData[keyName] = []byte(v["KeyPEM"])
}
}
agentSecretClient := ch.app.agentSecretClient
oldSec, err := agentSecretClient.GetNamespaced(appTargetNamespace, exporterEtcdCertName, metav1.GetOptions{})
if err != nil && k8serrors.IsNotFound(err) {
secret := &k8scorev1.Secret{
ObjectMeta: metav1.ObjectMeta{
Name: exporterEtcdCertName,
Namespace: appTargetNamespace,
},
Data: secretData,
}
if _, err = agentSecretClient.Create(secret); err != nil && !k8serrors.IsAlreadyExists(err) {
return nil, err
}
return etcdTLSConfigs, nil
}
newSec := oldSec.DeepCopy()
newSec.Data = secretData
_, err = agentSecretClient.Update(newSec)
return etcdTLSConfigs, err
}
func (ch *clusterHandler) getExporterEndpoint() (map[string][]string, error) {
endpointMap := make(map[string][]string)
etcdLablels := labels.Set{
"node-role.kubernetes.io/etcd": "true",
}
controlplaneLabels := labels.Set{
"node-role.kubernetes.io/controlplane": "true",
}
agentNodeLister := ch.app.agentNodeClient.Controller().Lister()
etcdNodes, err := agentNodeLister.List(metav1.NamespaceAll, etcdLablels.AsSelector())
if err != nil {
return nil, errors.Wrap(err, "failed to get etcd nodes")
}
for _, v := range etcdNodes {
endpointMap[etcd] = append(endpointMap[etcd], node.GetNodeInternalAddress(v))
}
controlplaneNodes, err := agentNodeLister.List(metav1.NamespaceAll, controlplaneLabels.AsSelector())
if err != nil {
return nil, errors.Wrap(err, "failed to get controlplane nodes")
}
for _, v := range controlplaneNodes {
endpointMap[controlplane] = append(endpointMap[controlplane], node.GetNodeInternalAddress(v))
}
return endpointMap, nil
}
func (ch *clusterHandler) deployApp(appName, appTargetNamespace string, appProjectName string, cluster *mgmtv3.Cluster, etcdTLSConfig []*etcdTLSConfig, systemComponentMap map[string][]string) (map[string]string, error) {
_, appDeployProjectID := ref.Parse(appProjectName)
clusterAlertManagerSvcName, clusterAlertManagerSvcNamespaces, clusterAlertManagerPort := monitoring.ClusterAlertManagerEndpoint()
optionalAppAnswers := map[string]string{
"exporter-kube-state.enabled": "true",
"exporter-kubelets.enabled": "true",
"exporter-kubernetes.enabled": "true",
"exporter-node.enabled": "true",
"exporter-fluentd.enabled": "true",
"grafana.persistence.enabled": "false",
"prometheus.persistence.enabled": "false",
}
mustAppAnswers := map[string]string{
"enabled": "false",
"exporter-coredns.enabled": "false",
"exporter-coredns.apiGroup": monitoring.APIVersion.Group,
"exporter-kube-controller-manager.enabled": "false",
"exporter-kube-controller-manager.apiGroup": monitoring.APIVersion.Group,
"exporter-kube-dns.enabled": "false",
"exporter-kube-dns.apiGroup": monitoring.APIVersion.Group,
"exporter-kube-etcd.enabled": "false",
"exporter-kube-etcd.apiGroup": monitoring.APIVersion.Group,
"exporter-kube-scheduler.enabled": "false",
"exporter-kube-scheduler.apiGroup": monitoring.APIVersion.Group,
"exporter-kube-state.apiGroup": monitoring.APIVersion.Group,
"exporter-kubelets.apiGroup": monitoring.APIVersion.Group,
"exporter-kubernetes.apiGroup": monitoring.APIVersion.Group,
"exporter-node.apiGroup": monitoring.APIVersion.Group,
"exporter-fluentd.apiGroup": monitoring.APIVersion.Group,
"grafana.enabled": "true",
"grafana.apiGroup": monitoring.APIVersion.Group,
"grafana.serviceAccountName": appName,
"prometheus.enabled": "true",
"prometheus.apiGroup": monitoring.APIVersion.Group,
"prometheus.externalLabels.prometheus_from": cluster.Spec.DisplayName,
"prometheus.serviceAccountNameOverride": appName,
"prometheus.additionalAlertManagerConfigs[0].static_configs[0].targets[0]": fmt.Sprintf("%s.%s:%s", clusterAlertManagerSvcName, clusterAlertManagerSvcNamespaces, clusterAlertManagerPort),
"prometheus.additionalAlertManagerConfigs[0].static_configs[0].labels.level": "cluster",
"prometheus.additionalAlertManagerConfigs[0].static_configs[0].labels.cluster_id": cluster.Name,
"prometheus.additionalAlertManagerConfigs[0].static_configs[0].labels.cluster_name": cluster.Spec.DisplayName,
"prometheus.serviceMonitorNamespaceSelector.matchExpressions[0].key": nslabels.ProjectIDFieldLabel,
"prometheus.serviceMonitorNamespaceSelector.matchExpressions[0].operator": "In",
"prometheus.serviceMonitorNamespaceSelector.matchExpressions[0].values[0]": appDeployProjectID,
"prometheus.ruleNamespaceSelector.matchExpressions[0].key": nslabels.ProjectIDFieldLabel,
"prometheus.ruleNamespaceSelector.matchExpressions[0].operator": "In",
"prometheus.ruleNamespaceSelector.matchExpressions[0].values[0]": appDeployProjectID,
"prometheus.ruleSelector.matchExpressions[0].key": monitoring.CattlePrometheusRuleLabelKey,
"prometheus.ruleSelector.matchExpressions[0].operator": "In",
"prometheus.ruleSelector.matchExpressions[0].values[0]": monitoring.CattleAlertingPrometheusRuleLabelValue,
"prometheus.ruleSelector.matchExpressions[0].values[1]": monitoring.CattleMonitoringPrometheusRuleLabelValue,
}
appAnswers := monitoring.OverwriteAppAnswers(optionalAppAnswers, cluster.Annotations)
// cannot overwrite mustAppAnswers
for mustKey, mustVal := range mustAppAnswers {
appAnswers[mustKey] = mustVal
}
if systemComponentMap != nil {
if etcdEndpoints, ok := systemComponentMap[etcd]; ok {
appAnswers["prometheus.secrets[0]"] = exporterEtcdCertName
appAnswers["exporter-kube-etcd.enabled"] = "true"
appAnswers["exporter-kube-etcd.ports.metrics.port"] = "2379"
sort.Strings(etcdEndpoints)
for k, v := range etcdEndpoints {
key := fmt.Sprintf("exporter-kube-etcd.endpoints[%d]", k)
appAnswers[key] = v
}
if etcdTLSConfig != nil {
sort.Slice(etcdTLSConfig, func(i, j int) bool {
return etcdTLSConfig[i].internalAddress < etcdTLSConfig[j].internalAddress
})
appAnswers["exporter-kube-etcd.certFile"] = etcdTLSConfig[0].certPath
appAnswers["exporter-kube-etcd.keyFile"] = etcdTLSConfig[0].keyPath
}
}
if controlplaneEndpoints, ok := systemComponentMap[controlplane]; ok {
appAnswers["exporter-kube-scheduler.enabled"] = "true"
appAnswers["exporter-kube-controller-manager.enabled"] = "true"
sort.Strings(controlplaneEndpoints)
for k, v := range controlplaneEndpoints {
key1 := fmt.Sprintf("exporter-kube-scheduler.endpoints[%d]", k)
key2 := fmt.Sprintf("exporter-kube-controller-manager.endpoints[%d]", k)
appAnswers[key1] = v
appAnswers[key2] = v
}
}
}
appCatalogID := settings.SystemMonitoringCatalogID.Get()
app := &v3.App{
ObjectMeta: metav1.ObjectMeta{
Annotations: monitoring.CopyCreatorID(nil, cluster.Annotations),
Labels: monitoring.OwnedLabels(appName, appTargetNamespace, appProjectName, monitoring.ClusterLevel),
Name: appName,
Namespace: appDeployProjectID,
},
Spec: v3.AppSpec{
Answers: appAnswers,
Description: "Rancher Cluster Monitoring",
ExternalID: appCatalogID,
ProjectName: appProjectName,
TargetNamespace: appTargetNamespace,
},
}
err := monitoring.DeployApp(ch.app.cattleAppClient, appDeployProjectID, app)
if err != nil {
return nil, err
}
return appAnswers, nil
}
func getClusterTag(cluster *mgmtv3.Cluster) string {
return fmt.Sprintf("%s(%s)", cluster.Name, cluster.Spec.DisplayName)
}
func isRkeCluster(cluster *mgmtv3.Cluster) bool {
return cluster.Status.Driver == mgmtv3.ClusterDriverRKE
}
func getSecretPath(secretName, name string) string {
return fmt.Sprintf("/etc/prometheus/secrets/%s/%s", secretName, name)
}
func getCertName(name string) string {
return fmt.Sprintf("%s.pem", name)
}
func getKeyName(name string) string {
return fmt.Sprintf("%s-key.pem", name)
}
func (ch *clusterHandler) deployMetrics(cluster *mgmtv3.Cluster) error {
clusterName := cluster.Name
for _, metric := range preDefinedClusterMetrics {
newObj := metric.DeepCopy()
newObj.Namespace = clusterName
_, err := ch.app.cattleMonitorMetricClient.Create(newObj)
if err != nil && !k8serrors.IsAlreadyExists(err) {
return err
}
}
for _, graph := range preDefinedClusterGraph {
newObj := graph.DeepCopy()
newObj.Namespace = clusterName
_, err := ch.app.cattleClusterGraphClient.Create(newObj)
if err != nil && !k8serrors.IsAlreadyExists(err) {
return err
}
}
return nil
}
func (ch *clusterHandler) withdrawMetrics(cluster *mgmtv3.Cluster) error {
clusterName := cluster.Name
for _, metric := range preDefinedClusterMetrics {
err := ch.app.cattleMonitorMetricClient.DeleteNamespaced(clusterName, metric.Name, &metav1.DeleteOptions{})
if err != nil && !k8serrors.IsNotFound(err) {
return err
}
}
for _, graph := range preDefinedClusterGraph {
err := ch.app.cattleClusterGraphClient.DeleteNamespaced(clusterName, graph.Name, &metav1.DeleteOptions{})
if err != nil && !k8serrors.IsNotFound(err) {
return err
}
}
return nil
}
func (ch *clusterHandler) isPrometheusReady(cluster *mgmtv3.Cluster) (bool, error) {
svcName, namespace, _ := monitoring.ClusterPrometheusEndpoint()
endpoints, err := ch.agentEndpointsLister.Get(namespace, svcName)
if err != nil {
return false, errors.Wrapf(err, "failed to get %s/%s endpoints", namespace, svcName)
}
if len(endpoints.Subsets) == 0 || len(endpoints.Subsets[0].Addresses) == 0 {
return false, nil
}
return true, nil
}