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velero.go
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velero.go
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package snapshot
import (
"fmt"
"strings"
"time"
"context"
"regexp"
"github.com/pkg/errors"
"github.com/replicatedhq/kots/pkg/k8sutil"
kotsadmresources "github.com/replicatedhq/kots/pkg/kotsadm/resources"
kotsadmtypes "github.com/replicatedhq/kots/pkg/kotsadm/types"
velerov1api "github.com/vmware-tanzu/velero/pkg/apis/velero/v1"
"github.com/vmware-tanzu/velero/pkg/cmd/cli/serverstatus"
veleroclientv1 "github.com/vmware-tanzu/velero/pkg/generated/clientset/versioned/typed/velero/v1"
v1 "k8s.io/api/apps/v1"
corev1 "k8s.io/api/core/v1"
kuberneteserrors "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/labels"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/selection"
"k8s.io/client-go/kubernetes"
kbclient "sigs.k8s.io/controller-runtime/pkg/client"
)
var (
dockerImageNameRegex = regexp.MustCompile(`(?:([^\/]+)\/)?(?:([^\/]+)\/)?([^@:\/]+)(?:[@:](.+))`)
)
const (
VeleroNamespaceConfigMapName = "kotsadm-velero-namespace"
)
type VeleroStatus struct {
Version string
Plugins []string
Status string
Namespace string
VeleroPod string
NodeAgentPods []string
NodeAgentVersion string
NodeAgentStatus string
}
func (s *VeleroStatus) ContainsPlugin(plugin string) bool {
for _, x := range s.Plugins {
if strings.Contains(x, plugin) {
return true
}
}
return false
}
func CheckKotsadmVeleroAccess(ctx context.Context, kotsadmNamespace string) (requiresAccess bool, finalErr error) {
if kotsadmNamespace == "" {
finalErr = errors.New("kotsadmNamespace param is required")
return
}
cfg, err := k8sutil.GetClusterConfig()
if err != nil {
finalErr = errors.Wrap(err, "failed to get cluster config")
return
}
clientset, err := kubernetes.NewForConfig(cfg)
if err != nil {
finalErr = errors.Wrap(err, "failed to create clientset")
return
}
if k8sutil.IsKotsadmClusterScoped(ctx, clientset, kotsadmNamespace) {
return
}
veleroConfigMap, err := clientset.CoreV1().ConfigMaps(kotsadmNamespace).Get(ctx, VeleroNamespaceConfigMapName, metav1.GetOptions{})
if err != nil {
if !kuberneteserrors.IsNotFound(err) {
finalErr = errors.Wrap(err, "failed to lookup velero configmap")
return
}
// since this is a minimal rbac installation, kotsadm requires this configmap to know which namespace velero is installed in.
// so if it's not found, then the user probably hasn't yet run the command that gives kotsadm access to the namespace velero is installed in,
// which will also (re)generate this configmap
requiresAccess = true
return
}
if veleroConfigMap.Data == nil {
requiresAccess = true
return
}
veleroNamespace := veleroConfigMap.Data["veleroNamespace"]
if veleroNamespace == "" {
requiresAccess = true
return
}
veleroClient, err := veleroclientv1.NewForConfig(cfg)
if err != nil {
finalErr = errors.Wrap(err, "failed to create velero clientset")
return
}
backupStorageLocations, err := veleroClient.BackupStorageLocations(veleroNamespace).List(ctx, metav1.ListOptions{})
if kuberneteserrors.IsForbidden(err) {
requiresAccess = true
return
}
if err != nil {
finalErr = errors.Wrap(err, "failed to list backup storage locations")
return
}
verifiedVeleroNamespace := ""
for _, backupStorageLocation := range backupStorageLocations.Items {
if backupStorageLocation.Name == "default" {
verifiedVeleroNamespace = backupStorageLocation.Namespace
break
}
}
if verifiedVeleroNamespace == "" {
requiresAccess = true
return
}
_, err = clientset.RbacV1().Roles(verifiedVeleroNamespace).Get(ctx, "kotsadm-role", metav1.GetOptions{})
if err != nil {
requiresAccess = true
return
}
_, err = clientset.RbacV1().RoleBindings(verifiedVeleroNamespace).Get(ctx, "kotsadm-rolebinding", metav1.GetOptions{})
if err != nil {
requiresAccess = true
return
}
requiresAccess = false
return
}
func EnsureVeleroPermissions(ctx context.Context, clientset kubernetes.Interface, veleroNamespace string, kotsadmNamespace string) error {
cfg, err := k8sutil.GetClusterConfig()
if err != nil {
return errors.Wrap(err, "failed to get cluster config")
}
veleroClient, err := veleroclientv1.NewForConfig(cfg)
if err != nil {
return errors.Wrap(err, "failed to create velero clientset")
}
backupStorageLocations, err := veleroClient.BackupStorageLocations(veleroNamespace).List(ctx, metav1.ListOptions{})
if err != nil {
return errors.Wrapf(err, "failed to list backupstoragelocations in '%s' namespace", veleroNamespace)
}
verifiedVeleroNamespace := ""
for _, backupStorageLocation := range backupStorageLocations.Items {
if backupStorageLocation.Name == "default" {
verifiedVeleroNamespace = backupStorageLocation.Namespace
break
}
}
if verifiedVeleroNamespace == "" {
return errors.New(fmt.Sprintf("could not detect velero in '%s' namespace", veleroNamespace))
}
if err := kotsadmresources.EnsureKotsadmRole(verifiedVeleroNamespace, clientset); err != nil {
return errors.Wrap(err, "failed to ensure kotsadm role")
}
if err := kotsadmresources.EnsureKotsadmRoleBinding(verifiedVeleroNamespace, kotsadmNamespace, clientset); err != nil {
return errors.Wrap(err, "failed to ensure kotsadm rolebinding")
}
return nil
}
func EnsureVeleroNamespaceConfigMap(ctx context.Context, clientset kubernetes.Interface, veleroNamespace string, kotsadmNamespace string) error {
existingConfigMap, err := clientset.CoreV1().ConfigMaps(kotsadmNamespace).Get(ctx, VeleroNamespaceConfigMapName, metav1.GetOptions{})
if err != nil {
if !kuberneteserrors.IsNotFound(err) {
return errors.Wrap(err, "failed to lookup velero configmap")
}
newConfigMap := &corev1.ConfigMap{
TypeMeta: metav1.TypeMeta{
APIVersion: "v1",
Kind: "ConfigMap",
},
ObjectMeta: metav1.ObjectMeta{
Name: VeleroNamespaceConfigMapName,
Namespace: kotsadmNamespace,
Labels: kotsadmtypes.GetKotsadmLabels(),
},
Data: map[string]string{
"veleroNamespace": veleroNamespace,
},
}
_, err := clientset.CoreV1().ConfigMaps(kotsadmNamespace).Create(ctx, newConfigMap, metav1.CreateOptions{})
if err != nil {
return errors.Wrap(err, "failed to create velero configmap")
}
return nil
}
if existingConfigMap.Data == nil {
existingConfigMap.Data = make(map[string]string)
}
existingConfigMap.Data["veleroNamespace"] = veleroNamespace
_, err = clientset.CoreV1().ConfigMaps(kotsadmNamespace).Update(ctx, existingConfigMap, metav1.UpdateOptions{})
if err != nil {
return errors.Wrap(err, "failed to update velero configmap")
}
return nil
}
// TryGetVeleroNamespaceFromConfigMap in the case of minimal rbac installations, a configmap containing the velero namespace
// will be created once the user gives kotsadm access to velero using the cli
func TryGetVeleroNamespaceFromConfigMap(ctx context.Context, clientset kubernetes.Interface, kotsadmNamespace string) string {
c, err := clientset.CoreV1().ConfigMaps(kotsadmNamespace).Get(ctx, VeleroNamespaceConfigMapName, metav1.GetOptions{})
if err != nil {
return ""
}
if c.Data == nil {
return ""
}
return c.Data["veleroNamespace"]
}
// DetectVeleroNamespace will detect and validate the velero namespace
// kotsadmNamespace is only required in minimal rbac installations. if empty, cluster scope privileges will be needed to detect and validate velero
func DetectVeleroNamespace(ctx context.Context, clientset kubernetes.Interface, kotsadmNamespace string) (string, error) {
veleroNamespace := ""
if kotsadmNamespace != "" {
veleroNamespace = TryGetVeleroNamespaceFromConfigMap(ctx, clientset, kotsadmNamespace)
}
deployments, err := clientset.AppsV1().Deployments(veleroNamespace).List(ctx, metav1.ListOptions{})
if kuberneteserrors.IsNotFound(err) {
return "", nil
}
if err != nil {
// can't detect velero
return "", nil
}
for _, deployment := range deployments.Items {
if deployment.Name == "velero" {
return deployment.Namespace, nil
}
}
return "", nil
}
func DetectVelero(ctx context.Context, kotsadmNamespace string) (*VeleroStatus, error) {
clientset, err := k8sutil.GetClientset()
if err != nil {
return nil, errors.Wrap(err, "failed to get k8s clientset")
}
veleroNamespace, err := DetectVeleroNamespace(ctx, clientset, kotsadmNamespace)
if err != nil {
return nil, errors.Wrap(err, "failed to detect velero namespace")
}
if veleroNamespace == "" {
return nil, nil
}
veleroPod, err := getVeleroPod(ctx, clientset, veleroNamespace)
if err != nil {
return nil, errors.Wrap(err, "failed to list velero pods")
}
nodeAgentPods, err := getNodeAgentPods(ctx, clientset, veleroNamespace)
if err != nil {
return nil, errors.Wrap(err, "failed to list node-agent pods")
}
veleroStatus := VeleroStatus{
Plugins: []string{},
Namespace: veleroNamespace,
VeleroPod: veleroPod,
NodeAgentPods: nodeAgentPods,
}
possibleDeployments, err := listPossibleVeleroDeployments(ctx, clientset, veleroNamespace)
if err != nil {
return nil, errors.Wrap(err, "failed to list possible velero deployments")
}
version, err := getVersion(ctx, veleroNamespace)
if err != nil {
return nil, errors.Wrap(err, "failed to get velero version")
}
veleroStatus.Version = version
for _, deployment := range possibleDeployments {
for _, initContainer := range deployment.Spec.Template.Spec.InitContainers {
// the default installation is to name these like "velero-plugin-for-aws"
veleroStatus.Plugins = append(veleroStatus.Plugins, initContainer.Name)
}
matches := dockerImageNameRegex.FindStringSubmatch(deployment.Spec.Template.Spec.Containers[0].Image)
if len(matches) == 5 {
status := "NotReady"
if deployment.Status.AvailableReplicas > 0 {
status = "Ready"
}
veleroStatus.Status = status
goto DeploymentFound
}
}
DeploymentFound:
daemonsets, err := listPossibleNodeAgentDaemonsets(ctx, clientset, veleroNamespace)
if err != nil {
return nil, errors.Wrap(err, "failed to list node-agent daemonsets")
}
for _, daemonset := range daemonsets {
matches := dockerImageNameRegex.FindStringSubmatch(daemonset.Spec.Template.Spec.Containers[0].Image)
if len(matches) == 5 {
status := "NotReady"
if daemonset.Status.NumberAvailable > 0 {
if daemonset.Status.NumberUnavailable == 0 {
status = "Ready"
}
}
veleroStatus.NodeAgentVersion = matches[4]
veleroStatus.NodeAgentStatus = status
goto NodeAgentFound
}
}
NodeAgentFound:
return &veleroStatus, nil
}
func getVersion(ctx context.Context, namespace string) (string, error) {
clientConfig, err := k8sutil.GetClusterConfig()
if err != nil {
return "", errors.Wrap(err, "failed to get cluster config")
}
scheme := runtime.NewScheme()
velerov1api.AddToScheme(scheme)
kbClient, err := kbclient.New(clientConfig, kbclient.Options{
Scheme: scheme,
})
if err != nil {
return "", errors.Wrap(err, "failed to get velero client")
}
ctx, cancel := context.WithTimeout(ctx, 5*time.Second)
defer cancel()
serverStatusGetter := &serverstatus.DefaultServerStatusGetter{
Namespace: namespace,
Context: ctx,
}
serverStatus, err := serverStatusGetter.GetServerStatus(kbClient)
if err != nil {
return "", errors.Wrap(err, "error getting server version")
}
return serverStatus.Status.ServerVersion, nil
}
func getVeleroPod(ctx context.Context, clientset *kubernetes.Clientset, namespace string) (string, error) {
veleroLabels := map[string]string{
"component": "velero",
"deploy": "velero",
}
veleroPods, err := clientset.CoreV1().Pods(namespace).List(context.TODO(), metav1.ListOptions{
LabelSelector: labels.SelectorFromSet(veleroLabels).String(),
})
if err != nil {
return "", errors.Wrap(err, "failed to list velero pods before restarting")
}
for _, pod := range veleroPods.Items {
if pod.Status.Phase == corev1.PodRunning {
if pod.Status.ContainerStatuses[0].Ready {
return pod.Name, nil
}
}
}
return "", nil
}
func getNodeAgentPods(ctx context.Context, clientset *kubernetes.Clientset, namespace string) ([]string, error) {
componentReq, err := labels.NewRequirement("component", selection.Equals, []string{"velero"})
if err != nil {
return nil, errors.Wrap(err, "failed to create component requirement")
}
nameReq, err := labels.NewRequirement("name", selection.In, []string{"node-agent", "restic"})
if err != nil {
return nil, errors.Wrap(err, "failed to create name requirement")
}
labelSelector := labels.NewSelector()
labelSelector = labelSelector.Add(*componentReq, *nameReq)
nodeAgentPods, err := clientset.CoreV1().Pods(namespace).List(context.TODO(), metav1.ListOptions{
LabelSelector: labelSelector.String(),
})
if err != nil {
return nil, errors.Wrap(err, "failed to list node-agent pods before restarting")
}
pods := make([]string, 0)
for _, pod := range nodeAgentPods.Items {
if pod.Status.Phase == corev1.PodRunning {
if pod.Status.ContainerStatuses[0].Ready {
pods = append(pods, pod.Name)
}
}
}
return pods, nil
}
// listPossibleVeleroDeployments filters with a label selector based on how we've found velero deployed
// using the CLI or the Helm Chart.
func listPossibleVeleroDeployments(ctx context.Context, clientset *kubernetes.Clientset, namespace string) ([]v1.Deployment, error) {
deployments, err := clientset.AppsV1().Deployments(namespace).List(ctx, metav1.ListOptions{
LabelSelector: "component=velero",
})
if err != nil {
return nil, errors.Wrap(err, "failed to list deployments")
}
helmDeployments, err := clientset.AppsV1().Deployments(namespace).List(ctx, metav1.ListOptions{
LabelSelector: "app.kubernetes.io/name=velero",
})
if err != nil {
return nil, errors.Wrap(err, "failed to list helm deployments")
}
return append(deployments.Items, helmDeployments.Items...), nil
}
// listPossibleNodeAgentDaemonsets filters with a label selector based on how we've found node-agent deployed
// using the CLI or the Helm Chart.
func listPossibleNodeAgentDaemonsets(ctx context.Context, clientset *kubernetes.Clientset, namespace string) ([]v1.DaemonSet, error) {
daemonsets, err := clientset.AppsV1().DaemonSets(namespace).List(ctx, metav1.ListOptions{
LabelSelector: "component=velero",
})
if err != nil {
return nil, errors.Wrap(err, "failed to list daemonsets")
}
helmDaemonsets, err := clientset.AppsV1().DaemonSets(namespace).List(ctx, metav1.ListOptions{
LabelSelector: "app.kubernetes.io/name=velero",
})
if err != nil {
return nil, errors.Wrap(err, "failed to list helm daemonsets")
}
return append(daemonsets.Items, helmDaemonsets.Items...), nil
}
// restartVelero will restart velero (and node-agent)
func restartVelero(ctx context.Context, kotsadmNamespace string) error {
clientset, err := k8sutil.GetClientset()
if err != nil {
return errors.Wrap(err, "failed to get k8s clientset")
}
veleroNamespace, err := DetectVeleroNamespace(ctx, clientset, kotsadmNamespace)
if err != nil {
return errors.Wrap(err, "failed to detect velero namespace")
}
veleroDeployments, err := listPossibleVeleroDeployments(ctx, clientset, veleroNamespace)
if err != nil {
return errors.Wrap(err, "failed to list possible velero deployments")
}
for _, veleroDeployment := range veleroDeployments {
pods, err := clientset.CoreV1().Pods(veleroNamespace).List(ctx, metav1.ListOptions{
LabelSelector: labels.SelectorFromSet(veleroDeployment.Labels).String(),
})
if err != nil {
return errors.Wrap(err, "failed to list velero pods")
}
for _, pod := range pods.Items {
if err := clientset.CoreV1().Pods(veleroNamespace).Delete(ctx, pod.Name, metav1.DeleteOptions{}); err != nil {
return errors.Wrapf(err, "failed to delete %s pod", pod.Name)
}
}
}
nodeAgentDaemonSets, err := listPossibleNodeAgentDaemonsets(ctx, clientset, veleroNamespace)
if err != nil {
return errors.Wrap(err, "failed to list possible node-agent daemonsets")
}
for _, nodeAgentDaemonSet := range nodeAgentDaemonSets {
pods, err := clientset.CoreV1().Pods(veleroNamespace).List(ctx, metav1.ListOptions{
LabelSelector: labels.SelectorFromSet(nodeAgentDaemonSet.Labels).String(),
})
if err != nil {
return errors.Wrap(err, "failed to list node-agent pods")
}
for _, pod := range pods.Items {
if err := clientset.CoreV1().Pods(veleroNamespace).Delete(ctx, pod.Name, metav1.DeleteOptions{}); err != nil {
return errors.Wrapf(err, "failed to delete %s pod", pod.Name)
}
}
}
return nil
}