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system.go
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system.go
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package monitoring
import (
"fmt"
"github.com/pkg/errors"
"github.com/rancher/rancher/pkg/settings"
corev1 "github.com/rancher/types/apis/core/v1"
mgmtv3 "github.com/rancher/types/apis/management.cattle.io/v3"
projectv3 "github.com/rancher/types/apis/project.cattle.io/v3"
rbacv1 "github.com/rancher/types/apis/rbac.authorization.k8s.io/v1"
"github.com/sirupsen/logrus"
k8scorev1 "k8s.io/api/core/v1"
k8srbacv1 "k8s.io/api/rbac/v1"
k8serrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/runtime"
utilerrors "k8s.io/apimachinery/pkg/util/errors"
)
func SyncServiceMonitor(cluster *mgmtv3.Cluster, agentCoreClient corev1.Interface, agentRBACClient rbacv1.Interface, cattleAppsGetter projectv3.AppsGetter, cattleProjectsGetter mgmtv3.ProjectsGetter, cattleTemplateVersionsClient mgmtv3.TemplateVersionInterface) error {
if cluster.Spec.EnableClusterMonitoring || cluster.Spec.EnableClusterAlerting {
err := DeploySystemMonitor(cluster, agentCoreClient, agentRBACClient, cattleAppsGetter, cattleProjectsGetter, cattleTemplateVersionsClient)
if err != nil {
return errors.Wrap(err, "failed to deploy system monitoring")
}
} else if !cluster.Spec.EnableClusterMonitoring && !cluster.Spec.EnableClusterAlerting {
err := WithdrawSystemMonitor(cluster, agentCoreClient, agentRBACClient, cattleAppsGetter)
if err != nil {
return errors.Wrap(err, "failed to withdraw system monitoring")
}
}
return nil
}
func DeploySystemMonitor(cluster *mgmtv3.Cluster, agentCoreClient corev1.Interface, agentRBACClient rbacv1.Interface, cattleAppsGetter projectv3.AppsGetter, cattleProjectsGetter mgmtv3.ProjectsGetter, cattleTemplateVersionsClient mgmtv3.TemplateVersionInterface) (backErr error) {
if cluster == nil || cluster.DeletionTimestamp != nil {
logrus.Warnf("cluster %s is deleted", cluster.Name)
return nil
}
appName, appTargetNamespace := SystemMonitoringInfo()
_, backErr = mgmtv3.ClusterConditionPrometheusOperatorDeployed.Do(cluster, func() (runtime.Object, error) {
appCatalogID := settings.SystemMonitoringCatalogID.Get()
err := DetectAppCatalogExistence(appCatalogID, cattleTemplateVersionsClient)
if err != nil {
return nil, errors.Wrapf(err, "failed to ensure catalog %q", appCatalogID)
}
appDeployProjectID, err := GetSystemProjectID(cattleProjectsGetter.Projects(cluster.Name))
if err != nil {
return nil, errors.Wrap(err, "failed to get System Project ID")
}
appProjectName, err := EnsureAppProjectName(agentCoreClient.Namespaces(metav1.NamespaceAll), appDeployProjectID, cluster.Name, appTargetNamespace)
if err != nil {
return nil, errors.Wrap(err, "failed to ensure monitoring project name")
}
appServiceAccountName, err := grantSystemMonitorRBAC(agentCoreClient.(corev1.ServiceAccountsGetter), agentRBACClient, appName, appTargetNamespace)
if err != nil {
return nil, errors.Wrap(err, "failed to grant monitoring permissions")
}
appAnswers := map[string]string{
"enabled": "true",
"apiGroup": APIVersion.Group,
"nameOverride": "prometheus-operator",
"serviceAccountName": appServiceAccountName,
}
app := &projectv3.App{
ObjectMeta: metav1.ObjectMeta{
Annotations: CopyCreatorID(nil, cluster.Annotations),
Labels: OwnedLabels(appName, appTargetNamespace, SystemLevel),
Name: appName,
},
Spec: projectv3.AppSpec{
Answers: appAnswers,
Description: "Prometheus Operator for Rancher Monitoring",
ExternalID: appCatalogID,
ProjectName: appProjectName,
TargetNamespace: appTargetNamespace,
},
}
err = DeployApp(cattleAppsGetter, appDeployProjectID, app)
if err != nil {
return nil, errors.Wrap(err, "failed to ensure prometheus operator app")
}
return cluster, nil
})
if backErr != nil {
return backErr
}
return nil
}
func grantSystemMonitorRBAC(agentServiceAccountGetter corev1.ServiceAccountsGetter, agentRBACClient rbacv1.Interface, appName, appTargetNamespace string) (string, error) {
appServiceAccountName := appName
appClusterRoleName := appServiceAccountName
appClusterRoleBindingName := appServiceAccountName + "-binding"
err := utilerrors.AggregateGoroutines(
// detect ServiceAccount (the name as same as App)
func() error {
appServiceAccount, err := agentServiceAccountGetter.ServiceAccounts(appTargetNamespace).Get(appServiceAccountName, metav1.GetOptions{})
if err != nil && !k8serrors.IsNotFound(err) {
return errors.Wrapf(err, "failed to query %q ServiceAccount", appServiceAccountName)
}
if appServiceAccount.Name == appServiceAccountName {
if appServiceAccount.DeletionTimestamp != nil {
return errors.New(fmt.Sprintf("stale %q ServiceAccount is still on terminating", appServiceAccountName))
}
} else {
appServiceAccount = &k8scorev1.ServiceAccount{
ObjectMeta: metav1.ObjectMeta{
Name: appServiceAccountName,
Namespace: appTargetNamespace,
Labels: OwnedLabels(appName, appTargetNamespace, SystemLevel),
},
}
if _, err := agentServiceAccountGetter.ServiceAccounts(appTargetNamespace).Create(appServiceAccount); err != nil && !k8serrors.IsAlreadyExists(err) {
return errors.Wrapf(err, "failed to create %q ServiceAccount", appServiceAccountName)
}
}
return nil
},
// detect ClusterRole (the name as same as App)
func() error {
appClusterRole, err := agentRBACClient.ClusterRoles(metav1.NamespaceAll).Get(appClusterRoleName, metav1.GetOptions{})
if err != nil && !k8serrors.IsNotFound(err) {
return errors.Wrapf(err, "failed to query %q ClusterRole", appClusterRoleName)
}
rules := []k8srbacv1.PolicyRule{
{
APIGroups: []string{APIVersion.Group},
Resources: []string{"alertmanager", "alertmanagers", "prometheus", "prometheuses", "service-monitor", "servicemonitors", "prometheusrules", "prometheuses/finalizers", "alertmanagers/finalizers"},
Verbs: []string{"*"},
},
{
APIGroups: []string{"apps"},
Resources: []string{"statefulsets"},
Verbs: []string{"*"},
},
{
APIGroups: []string{""},
Resources: []string{"configmaps", "secrets"},
Verbs: []string{"*"},
},
{
APIGroups: []string{""},
Resources: []string{"pods"},
Verbs: []string{"list", "delete"},
},
{
APIGroups: []string{""},
Resources: []string{"services", "endpoints"},
Verbs: []string{"get", "create", "update"},
},
{
APIGroups: []string{""},
Resources: []string{"nodes", "namespaces"},
Verbs: []string{"list", "watch"},
},
}
if appClusterRole.Name == appClusterRoleName {
if appClusterRole.DeletionTimestamp != nil {
return errors.New(fmt.Sprintf("stale %q ClusterRole is still on terminating", appClusterRoleName))
}
// ensure
appClusterRole = appClusterRole.DeepCopy()
appClusterRole.Rules = rules
if _, err := agentRBACClient.ClusterRoles(metav1.NamespaceAll).Update(appClusterRole); err != nil {
return errors.Wrapf(err, "failed to update %q ClusterRole", appClusterRoleName)
}
} else {
appClusterRole = &k8srbacv1.ClusterRole{
ObjectMeta: metav1.ObjectMeta{
Name: appClusterRoleName,
Labels: OwnedLabels(appName, appTargetNamespace, SystemLevel),
},
Rules: rules,
}
if _, err := agentRBACClient.ClusterRoles(metav1.NamespaceAll).Create(appClusterRole); err != nil && !k8serrors.IsAlreadyExists(err) {
return errors.Wrapf(err, "failed to create %q ClusterRole", appClusterRoleName)
}
}
return nil
},
// detect ClusterRoleBinding (the name is ${ServiceAccountName}-binding)
func() error {
appClusterRoleBinding, err := agentRBACClient.ClusterRoleBindings(metav1.NamespaceAll).Get(appClusterRoleBindingName, metav1.GetOptions{})
if err != nil && !k8serrors.IsNotFound(err) {
return errors.Wrapf(err, "failed to query %q ClusterRoleBinding", appClusterRoleBindingName)
}
if appClusterRoleBinding.Name == appClusterRoleBindingName {
if appClusterRoleBinding.DeletionTimestamp != nil {
return errors.New(fmt.Sprintf("stale %q ClusterRoleBinding is still on terminating", appClusterRoleBindingName))
}
} else {
appClusterRoleBinding = &k8srbacv1.ClusterRoleBinding{
ObjectMeta: metav1.ObjectMeta{
Name: appClusterRoleBindingName,
Labels: OwnedLabels(appName, appTargetNamespace, SystemLevel),
},
Subjects: []k8srbacv1.Subject{
{
Kind: k8srbacv1.ServiceAccountKind,
Namespace: appTargetNamespace,
Name: appServiceAccountName,
},
},
RoleRef: k8srbacv1.RoleRef{
APIGroup: k8srbacv1.GroupName,
Kind: "ClusterRole",
Name: appClusterRoleName,
},
}
if _, err := agentRBACClient.ClusterRoleBindings(metav1.NamespaceAll).Create(appClusterRoleBinding); err != nil && !k8serrors.IsAlreadyExists(err) {
return errors.Wrapf(err, "failed to create %q ClusterRoleBinding", appClusterRoleBindingName)
}
}
return nil
},
)
if err != nil {
return "", err
}
return appServiceAccountName, nil
}
func WithdrawSystemMonitor(cluster *mgmtv3.Cluster, agentCoreClient corev1.Interface, agentRBACClient rbacv1.Interface, cattleAppsGetter projectv3.AppsGetter) error {
if cluster == nil || cluster.DeletionTimestamp != nil {
logrus.Warnf("cluster %s is deleted", cluster.Name)
return nil
}
appName, appTargetNamespace := SystemMonitoringInfo()
if !mgmtv3.ClusterConditionPrometheusOperatorDeployed.IsFalse(cluster) {
if err := WithdrawApp(cattleAppsGetter, OwnedAppListOptions(appName, appTargetNamespace)); err != nil {
mgmtv3.ClusterConditionPrometheusOperatorDeployed.Unknown(cluster)
mgmtv3.ClusterConditionPrometheusOperatorDeployed.Message(cluster, err.Error())
return errors.Wrap(err, "failed to withdraw prometheus operator app")
}
appServiceAccountName := appName
appClusterRoleName := appName
appClusterRoleBindingName := appClusterRoleName + "-binding"
if err := RevokePermissions(agentRBACClient, agentCoreClient, appServiceAccountName, appClusterRoleName, appClusterRoleBindingName, appTargetNamespace); err != nil {
mgmtv3.ClusterConditionPrometheusOperatorDeployed.Unknown(cluster)
mgmtv3.ClusterConditionPrometheusOperatorDeployed.Message(cluster, err.Error())
return errors.Wrap(err, "failed to revoke monitoring permissions")
}
mgmtv3.ClusterConditionPrometheusOperatorDeployed.False(cluster)
mgmtv3.ClusterConditionPrometheusOperatorDeployed.Message(cluster, "")
}
return nil
}