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handler.go
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handler.go
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/*
Copyright 2021. The KubeVela Authors.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package query
import (
"bufio"
"context"
"fmt"
"io"
"regexp"
"strconv"
"strings"
"time"
"github.com/pkg/errors"
corev1 "k8s.io/api/core/v1"
networkv1beta1 "k8s.io/api/networking/v1beta1"
kerrors "k8s.io/apimachinery/pkg/api/errors"
v1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/rest"
"k8s.io/klog"
"sigs.k8s.io/controller-runtime/pkg/client"
"github.com/oam-dev/kubevela/apis/core.oam.dev/v1beta1"
apis "github.com/oam-dev/kubevela/apis/types"
helmapi "github.com/oam-dev/kubevela/pkg/appfile/helm/flux2apis"
"github.com/oam-dev/kubevela/pkg/cue/model/value"
"github.com/oam-dev/kubevela/pkg/multicluster"
"github.com/oam-dev/kubevela/pkg/utils"
querytypes "github.com/oam-dev/kubevela/pkg/velaql/providers/query/types"
wfContext "github.com/oam-dev/kubevela/pkg/workflow/context"
"github.com/oam-dev/kubevela/pkg/workflow/providers"
"github.com/oam-dev/kubevela/pkg/workflow/types"
)
const (
// ProviderName is provider name for install.
ProviderName = "query"
// HelmReleaseKind is the kind of HelmRelease
HelmReleaseKind = "HelmRelease"
annoAmbassadorServiceName = "ambassador.service/name"
annoAmbassadorServiceNamespace = "ambassador.service/namespace"
)
var fluxcdGroupVersion = schema.GroupVersion{Group: "helm.toolkit.fluxcd.io", Version: "v2beta1"}
type provider struct {
cli client.Client
cfg *rest.Config
}
// Resource refer to an object with cluster info
type Resource struct {
Cluster string `json:"cluster"`
Component string `json:"component"`
Revision string `json:"revision"`
Object *unstructured.Unstructured `json:"object"`
}
// Option is the query option
type Option struct {
Name string `json:"name"`
Namespace string `json:"namespace"`
Filter FilterOption `json:"filter,omitempty"`
// WithStatus means query the object from the cluster and get the latest status
// This field only suitable for ListResourcesInApp
WithStatus bool `json:"withStatus,omitempty"`
}
// FilterOption filter resource created by component
type FilterOption struct {
Cluster string `json:"cluster,omitempty"`
ClusterNamespace string `json:"clusterNamespace,omitempty"`
Components []string `json:"components,omitempty"`
APIVersion string `json:"apiVersion,omitempty"`
Kind string `json:"kind,omitempty"`
}
// ListResourcesInApp lists CRs created by Application, this provider queries the object data.
func (h *provider) ListResourcesInApp(ctx wfContext.Context, v *value.Value, act types.Action) error {
val, err := v.LookupValue("app")
if err != nil {
return err
}
opt := Option{}
if err = val.UnmarshalTo(&opt); err != nil {
return err
}
collector := NewAppCollector(h.cli, opt)
appResList, err := collector.CollectResourceFromApp()
if err != nil {
return v.FillObject(err.Error(), "err")
}
if appResList == nil {
appResList = make([]Resource, 0)
}
return fillQueryResult(v, appResList, "list")
}
// ListAppliedResources list applied resource from tracker, this provider only queries the metadata.
func (h *provider) ListAppliedResources(ctx wfContext.Context, v *value.Value, act types.Action) error {
val, err := v.LookupValue("app")
if err != nil {
return err
}
opt := Option{}
if err = val.UnmarshalTo(&opt); err != nil {
return err
}
collector := NewAppCollector(h.cli, opt)
app := new(v1beta1.Application)
appKey := client.ObjectKey{Name: opt.Name, Namespace: opt.Namespace}
if err := h.cli.Get(context.Background(), appKey, app); err != nil {
return v.FillObject(err.Error(), "err")
}
appResList, err := collector.ListApplicationResources(app)
if err != nil {
return v.FillObject(err.Error(), "err")
}
if appResList == nil {
appResList = make([]*querytypes.AppliedResource, 0)
}
return fillQueryResult(v, appResList, "list")
}
// GetApplicationResourceTree get resource tree of application
func (h *provider) GetApplicationResourceTree(ctx wfContext.Context, v *value.Value, act types.Action) error {
val, err := v.LookupValue("app")
if err != nil {
return err
}
opt := Option{}
if err = val.UnmarshalTo(&opt); err != nil {
return err
}
collector := NewAppCollector(h.cli, opt)
app := new(v1beta1.Application)
appKey := client.ObjectKey{Name: opt.Name, Namespace: opt.Namespace}
if err := h.cli.Get(context.Background(), appKey, app); err != nil {
return v.FillObject(err.Error(), "err")
}
appResList, err := collector.ListApplicationResources(app)
if err != nil {
return v.FillObject(err.Error(), "err")
}
// merge user defined customize rule before every request.
err = mergeCustomRules(context.Background(), h.cli)
if err != nil {
return err
}
for _, resource := range appResList {
root := querytypes.ResourceTreeNode{
APIVersion: resource.APIVersion,
Kind: resource.Kind,
Cluster: resource.Cluster,
Namespace: resource.Namespace,
Name: resource.Name,
UID: resource.UID,
}
root.LeafNodes, err = iteratorChildResources(context.Background(), resource.Cluster, h.cli, root, 1)
if err != nil {
// if the resource has been deleted, continue access next appliedResource don't break the whole request
if kerrors.IsNotFound(err) {
continue
}
return v.FillObject(err.Error(), "err")
}
rootObject, err := fetchObjectWithResourceTreeNode(context.Background(), resource.Cluster, h.cli, root)
if err != nil {
return v.FillObject(err.Error(), "err")
}
rootStatus, err := checkResourceStatus(*rootObject)
if err != nil {
return v.FillObject(err.Error(), "err")
}
root.HealthStatus = *rootStatus
addInfo, err := additionalInfo(*rootObject)
if err != nil {
return err
}
root.AdditionalInfo = addInfo
root.CreationTimestamp = rootObject.GetCreationTimestamp().Time
if !rootObject.GetDeletionTimestamp().IsZero() {
root.DeletionTimestamp = rootObject.GetDeletionTimestamp().Time
}
resource.ResourceTree = &root
}
return fillQueryResult(v, appResList, "list")
}
func (h *provider) CollectPods(ctx wfContext.Context, v *value.Value, act types.Action) error {
val, err := v.LookupValue("value")
if err != nil {
return err
}
cluster, err := v.GetString("cluster")
if err != nil {
return err
}
obj := new(unstructured.Unstructured)
if err = val.UnmarshalTo(obj); err != nil {
return err
}
var pods []*unstructured.Unstructured
var collector PodCollector
switch obj.GroupVersionKind() {
case fluxcdGroupVersion.WithKind(HelmReleaseKind):
collector = helmReleasePodCollector
default:
collector = NewPodCollector(obj.GroupVersionKind())
}
pods, err = collector(h.cli, obj, cluster)
if err != nil {
return v.FillObject(err.Error(), "err")
}
return fillQueryResult(v, pods, "list")
}
func (h *provider) SearchEvents(ctx wfContext.Context, v *value.Value, act types.Action) error {
val, err := v.LookupValue("value")
if err != nil {
return err
}
cluster, err := v.GetString("cluster")
if err != nil {
return err
}
obj := new(unstructured.Unstructured)
if err = val.UnmarshalTo(obj); err != nil {
return err
}
listCtx := multicluster.ContextWithClusterName(context.Background(), cluster)
fieldSelector := getEventFieldSelector(obj)
eventList := corev1.EventList{}
listOpts := []client.ListOption{
client.InNamespace(obj.GetNamespace()),
client.MatchingFieldsSelector{
Selector: fieldSelector,
},
}
if err := h.cli.List(listCtx, &eventList, listOpts...); err != nil {
return v.FillObject(err.Error(), "err")
}
return fillQueryResult(v, eventList.Items, "list")
}
// GeneratorServiceEndpoints generator service endpoints is available for common component type,
// such as webservice or helm
// it can not support the cloud service component currently
func (h *provider) GeneratorServiceEndpoints(wfctx wfContext.Context, v *value.Value, act types.Action) error {
ctx := context.Background()
findResource := func(obj client.Object, name, namespace, cluster string) error {
obj.SetNamespace(namespace)
obj.SetName(name)
gctx, cancel := context.WithTimeout(ctx, time.Second*10)
defer cancel()
if err := h.cli.Get(multicluster.ContextWithClusterName(gctx, cluster),
client.ObjectKeyFromObject(obj), obj); err != nil {
if kerrors.IsNotFound(err) {
return nil
}
return err
}
return nil
}
val, err := v.LookupValue("app")
if err != nil {
return err
}
opt := Option{}
if err = val.UnmarshalTo(&opt); err != nil {
return err
}
app := new(v1beta1.Application)
err = findResource(app, opt.Name, opt.Namespace, "")
if err != nil {
return fmt.Errorf("query app failure %w", err)
}
serviceEndpoints := make([]querytypes.ServiceEndpoint, 0)
var clusterGatewayNodeIP = make(map[string]string)
collector := NewAppCollector(h.cli, opt)
resources, err := collector.ListApplicationResources(app)
if err != nil {
return err
}
for i, resource := range resources {
cluster := resources[i].Cluster
selectorNodeIP := func() string {
if ip, exist := clusterGatewayNodeIP[cluster]; exist {
return ip
}
ip := selectorNodeIP(ctx, cluster, h.cli)
if ip != "" {
clusterGatewayNodeIP[cluster] = ip
}
return ip
}
switch resource.Kind {
case "Ingress":
if resource.GroupVersionKind().Group == networkv1beta1.GroupName && (resource.GroupVersionKind().Version == "v1beta1" || resource.GroupVersionKind().Version == "v1") {
var ingress networkv1beta1.Ingress
ingress.SetGroupVersionKind(resource.GroupVersionKind())
if err := findResource(&ingress, resource.Name, resource.Namespace, resource.Cluster); err != nil {
klog.Error(err, fmt.Sprintf("find v1 Ingress %s/%s from cluster %s failure", resource.Name, resource.Namespace, resource.Cluster))
continue
}
serviceEndpoints = append(serviceEndpoints, generatorFromIngress(ingress, cluster, resource.Component)...)
} else {
klog.Warning("not support ingress version", "version", resource.GroupVersionKind())
}
case "Service":
var service corev1.Service
service.SetGroupVersionKind(resource.GroupVersionKind())
if err := findResource(&service, resource.Name, resource.Namespace, resource.Cluster); err != nil {
klog.Error(err, fmt.Sprintf("find v1 Service %s/%s from cluster %s failure", resource.Name, resource.Namespace, resource.Cluster))
continue
}
serviceEndpoints = append(serviceEndpoints, generatorFromService(service, selectorNodeIP, cluster, resource.Component, "")...)
case helmapi.HelmReleaseGVK.Kind:
obj := new(unstructured.Unstructured)
obj.SetNamespace(resource.Namespace)
obj.SetName(resource.Name)
hc := NewHelmReleaseCollector(h.cli, obj)
services, err := hc.CollectServices(ctx, resource.Cluster)
if err != nil {
klog.Error(err, "collect service by helm release failure", "helmRelease", resource.Name, "namespace", resource.Namespace, "cluster", resource.Cluster)
}
for _, service := range services {
serviceEndpoints = append(serviceEndpoints, generatorFromService(service, selectorNodeIP, cluster, resource.Component, "")...)
}
ingress, err := hc.CollectIngress(ctx, resource.Cluster)
if err != nil {
klog.Error(err, "collect ingres by helm release failure", "helmRelease", resource.Name, "namespace", resource.Namespace, "cluster", resource.Cluster)
}
for _, uns := range ingress {
var ingress networkv1beta1.Ingress
if err := runtime.DefaultUnstructuredConverter.FromUnstructured(uns.UnstructuredContent(), &ingress); err != nil {
klog.Errorf("fail to convert unstructured to ingress %s", err.Error())
continue
}
serviceEndpoints = append(serviceEndpoints, generatorFromIngress(ingress, cluster, resource.Component)...)
}
case "SeldonDeployment":
obj := new(unstructured.Unstructured)
obj.SetGroupVersionKind(schema.GroupVersionKind{
Group: "machinelearning.seldon.io",
Version: "v1",
Kind: "SeldonDeployment",
})
if err := findResource(obj, resource.Name, resource.Namespace, resource.Cluster); err != nil {
klog.Error(err, fmt.Sprintf("find v1 Seldon Deployment %s/%s from cluster %s failure", resource.Name, resource.Namespace, resource.Cluster))
continue
}
anno := obj.GetAnnotations()
serviceName := "ambassador"
serviceNS := "vela-system"
if anno != nil {
if anno[annoAmbassadorServiceName] != "" {
serviceName = anno[annoAmbassadorServiceName]
}
if anno[annoAmbassadorServiceNamespace] != "" {
serviceNS = anno[annoAmbassadorServiceNamespace]
}
}
var service corev1.Service
if err := findResource(&service, serviceName, serviceNS, resource.Cluster); err != nil {
klog.Error(err, fmt.Sprintf("find v1 Service %s/%s from cluster %s failure", serviceName, serviceNS, resource.Cluster))
continue
}
serviceEndpoints = append(serviceEndpoints, generatorFromService(service, selectorNodeIP, cluster, resource.Component, fmt.Sprintf("/seldon/%s/%s", resource.Namespace, resource.Name))...)
}
}
return fillQueryResult(v, serviceEndpoints, "list")
}
var (
terminatedContainerNotFoundRegex = regexp.MustCompile("previous terminated container .+ in pod .+ not found")
)
func isTerminatedContainerNotFound(err error) bool {
return err != nil && terminatedContainerNotFoundRegex.MatchString(err.Error())
}
func (h *provider) CollectLogsInPod(ctx wfContext.Context, v *value.Value, act types.Action) error {
cluster, err := v.GetString("cluster")
if err != nil {
return errors.Wrapf(err, "invalid cluster")
}
namespace, err := v.GetString("namespace")
if err != nil {
return errors.Wrapf(err, "invalid namespace")
}
pod, err := v.GetString("pod")
if err != nil {
return errors.Wrapf(err, "invalid pod name")
}
val, err := v.LookupValue("options")
if err != nil {
return errors.Wrapf(err, "invalid log options")
}
opts := &corev1.PodLogOptions{}
if err = val.UnmarshalTo(opts); err != nil {
return errors.Wrapf(err, "invalid log options content")
}
cliCtx := multicluster.ContextWithClusterName(context.Background(), cluster)
clientSet, err := kubernetes.NewForConfig(h.cfg)
if err != nil {
return errors.Wrapf(err, "failed to create kubernetes clientset")
}
podInst, err := clientSet.CoreV1().Pods(namespace).Get(cliCtx, pod, v1.GetOptions{})
if err != nil {
return errors.Wrapf(err, "failed to get pod")
}
req := clientSet.CoreV1().Pods(namespace).GetLogs(pod, opts)
readCloser, err := req.Stream(cliCtx)
if err != nil && !isTerminatedContainerNotFound(err) {
return errors.Wrapf(err, "failed to get stream logs")
}
r := bufio.NewReader(readCloser)
var b strings.Builder
var readErr error
if err == nil {
defer func() {
_ = readCloser.Close()
}()
for {
s, err := r.ReadString('\n')
b.WriteString(s)
if err != nil {
if !errors.Is(err, io.EOF) {
readErr = err
}
break
}
}
} else {
readErr = err
}
toDate := v1.Now()
var fromDate v1.Time
// nolint
if opts.SinceTime != nil {
fromDate = *opts.SinceTime
} else if opts.SinceSeconds != nil {
fromDate = v1.NewTime(toDate.Add(time.Duration(-(*opts.SinceSeconds) * int64(time.Second))))
} else {
fromDate = podInst.CreationTimestamp
}
o := map[string]interface{}{
"logs": b.String(),
"info": map[string]interface{}{
"fromDate": fromDate,
"toDate": toDate,
},
}
if readErr != nil {
o["err"] = readErr.Error()
}
return v.FillObject(o, "outputs")
}
// Install register handlers to provider discover.
func Install(p providers.Providers, cli client.Client, cfg *rest.Config) {
prd := &provider{
cli: cli,
cfg: cfg,
}
p.Register(ProviderName, map[string]providers.Handler{
"listResourcesInApp": prd.ListResourcesInApp,
"listAppliedResources": prd.ListAppliedResources,
"collectPods": prd.CollectPods,
"searchEvents": prd.SearchEvents,
"collectLogsInPod": prd.CollectLogsInPod,
"collectServiceEndpoints": prd.GeneratorServiceEndpoints,
"getApplicationTree": prd.GetApplicationResourceTree,
})
}
func generatorFromService(service corev1.Service, selectorNodeIP func() string, cluster, component, path string) []querytypes.ServiceEndpoint {
var serviceEndpoints []querytypes.ServiceEndpoint
switch service.Spec.Type {
case corev1.ServiceTypeLoadBalancer:
for _, port := range service.Spec.Ports {
judgeAppProtocol := judgeAppProtocol(port.Port)
for _, ingress := range service.Status.LoadBalancer.Ingress {
if ingress.Hostname != "" {
serviceEndpoints = append(serviceEndpoints, querytypes.ServiceEndpoint{
Endpoint: querytypes.Endpoint{
Protocol: port.Protocol,
AppProtocol: &judgeAppProtocol,
Host: ingress.Hostname,
Port: int(port.Port),
Path: path,
},
Ref: corev1.ObjectReference{
Kind: "Service",
Namespace: service.ObjectMeta.Namespace,
Name: service.ObjectMeta.Name,
UID: service.UID,
APIVersion: service.APIVersion,
ResourceVersion: service.ResourceVersion,
},
Cluster: cluster,
Component: component,
})
}
if ingress.IP != "" {
serviceEndpoints = append(serviceEndpoints, querytypes.ServiceEndpoint{
Endpoint: querytypes.Endpoint{
Protocol: port.Protocol,
AppProtocol: &judgeAppProtocol,
Host: ingress.IP,
Port: int(port.Port),
Path: path,
},
Ref: corev1.ObjectReference{
Kind: "Service",
Namespace: service.ObjectMeta.Namespace,
Name: service.ObjectMeta.Name,
UID: service.UID,
APIVersion: service.APIVersion,
ResourceVersion: service.ResourceVersion,
},
Cluster: cluster,
Component: component,
})
}
}
}
case corev1.ServiceTypeNodePort:
for _, port := range service.Spec.Ports {
judgeAppProtocol := judgeAppProtocol(port.Port)
serviceEndpoints = append(serviceEndpoints, querytypes.ServiceEndpoint{
Endpoint: querytypes.Endpoint{
Protocol: port.Protocol,
Port: int(port.NodePort),
AppProtocol: &judgeAppProtocol,
Host: selectorNodeIP(),
Path: path,
},
Ref: corev1.ObjectReference{
Kind: "Service",
Namespace: service.ObjectMeta.Namespace,
Name: service.ObjectMeta.Name,
UID: service.UID,
APIVersion: service.APIVersion,
ResourceVersion: service.ResourceVersion,
},
Cluster: cluster,
Component: component,
})
}
case corev1.ServiceTypeClusterIP, corev1.ServiceTypeExternalName:
}
return serviceEndpoints
}
func generatorFromIngress(ingress networkv1beta1.Ingress, cluster, component string) (serviceEndpoints []querytypes.ServiceEndpoint) {
getAppProtocol := func(host string) string {
if len(ingress.Spec.TLS) > 0 {
for _, tls := range ingress.Spec.TLS {
if len(tls.Hosts) > 0 && utils.StringsContain(tls.Hosts, host) {
return querytypes.HTTPS
}
if len(tls.Hosts) == 0 {
return querytypes.HTTPS
}
}
}
return "http"
}
// It depends on the Ingress Controller
getEndpointPort := func(appProtocol string) int {
if appProtocol == querytypes.HTTPS {
if port, err := strconv.Atoi(ingress.Annotations[apis.AnnoIngressControllerHTTPSPort]); port > 0 && err == nil {
return port
}
return 443
}
if port, err := strconv.Atoi(ingress.Annotations[apis.AnnoIngressControllerHTTPPort]); port > 0 && err == nil {
return port
}
return 80
}
for _, rule := range ingress.Spec.Rules {
var appProtocol = getAppProtocol(rule.Host)
var appPort = getEndpointPort(appProtocol)
if rule.HTTP != nil {
for _, path := range rule.HTTP.Paths {
serviceEndpoints = append(serviceEndpoints, querytypes.ServiceEndpoint{
Endpoint: querytypes.Endpoint{
Protocol: corev1.ProtocolTCP,
AppProtocol: &appProtocol,
Host: rule.Host,
Path: path.Path,
Port: appPort,
},
Ref: corev1.ObjectReference{
Kind: "Ingress",
Namespace: ingress.ObjectMeta.Namespace,
Name: ingress.ObjectMeta.Name,
UID: ingress.UID,
APIVersion: ingress.APIVersion,
ResourceVersion: ingress.ResourceVersion,
},
Cluster: cluster,
Component: component,
})
}
}
}
return serviceEndpoints
}
func selectorNodeIP(ctx context.Context, clusterName string, client client.Client) string {
ctx, cancel := context.WithTimeout(ctx, time.Second*10)
defer cancel()
var nodes corev1.NodeList
if err := client.List(multicluster.ContextWithClusterName(ctx, clusterName), &nodes); err != nil {
return ""
}
if len(nodes.Items) == 0 {
return ""
}
var gatewayNode *corev1.Node
var workerNodes []corev1.Node
for i, node := range nodes.Items {
if _, exist := node.Labels[apis.LabelNodeRoleGateway]; exist {
gatewayNode = &nodes.Items[i]
break
} else if _, exist := node.Labels[apis.LabelNodeRoleWorker]; exist {
workerNodes = append(workerNodes, nodes.Items[i])
}
}
if gatewayNode == nil && len(workerNodes) > 0 {
gatewayNode = &workerNodes[0]
}
if gatewayNode == nil {
gatewayNode = &nodes.Items[0]
}
if gatewayNode != nil {
var addressMap = make(map[corev1.NodeAddressType]string)
for _, address := range gatewayNode.Status.Addresses {
addressMap[address.Type] = address.Address
}
// first get external ip
if ip, exist := addressMap[corev1.NodeExternalIP]; exist {
return ip
}
if ip, exist := addressMap[corev1.NodeInternalIP]; exist {
return ip
}
}
return ""
}
// judgeAppProtocol RFC-6335 and http://www.iana.org/assignments/service-names).
func judgeAppProtocol(port int32) string {
switch port {
case 80, 8080:
return querytypes.HTTP
case 443:
return querytypes.HTTPS
case 3306:
return querytypes.Mysql
case 6379:
return querytypes.Redis
default:
return ""
}
}