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appcontroller.go
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appcontroller.go
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package controller
import (
"context"
"encoding/json"
"fmt"
"math"
"net/http"
"reflect"
"runtime/debug"
"sort"
"strconv"
"strings"
"sync"
"time"
clustercache "github.com/argoproj/gitops-engine/pkg/cache"
"github.com/argoproj/gitops-engine/pkg/diff"
"github.com/argoproj/gitops-engine/pkg/health"
synccommon "github.com/argoproj/gitops-engine/pkg/sync/common"
"github.com/argoproj/gitops-engine/pkg/utils/kube"
jsonpatch "github.com/evanphx/json-patch"
log "github.com/sirupsen/logrus"
"golang.org/x/sync/semaphore"
v1 "k8s.io/api/core/v1"
apierr "k8s.io/apimachinery/pkg/api/errors"
metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/labels"
apiruntime "k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/types"
"k8s.io/apimachinery/pkg/util/runtime"
"k8s.io/apimachinery/pkg/util/wait"
"k8s.io/apimachinery/pkg/watch"
"k8s.io/client-go/kubernetes"
"k8s.io/client-go/tools/cache"
"k8s.io/client-go/util/workqueue"
statecache "github.com/argoproj/argo-cd/v2/controller/cache"
"github.com/argoproj/argo-cd/v2/controller/metrics"
"github.com/argoproj/argo-cd/v2/pkg/apis/application"
appv1 "github.com/argoproj/argo-cd/v2/pkg/apis/application/v1alpha1"
appclientset "github.com/argoproj/argo-cd/v2/pkg/client/clientset/versioned"
"github.com/argoproj/argo-cd/v2/pkg/client/informers/externalversions/application/v1alpha1"
applisters "github.com/argoproj/argo-cd/v2/pkg/client/listers/application/v1alpha1"
"github.com/argoproj/argo-cd/v2/reposerver/apiclient"
"github.com/argoproj/argo-cd/v2/util/argo"
argodiff "github.com/argoproj/argo-cd/v2/util/argo/diff"
appstatecache "github.com/argoproj/argo-cd/v2/util/cache/appstate"
"github.com/argoproj/argo-cd/v2/util/db"
"github.com/argoproj/argo-cd/v2/util/errors"
"github.com/argoproj/argo-cd/v2/util/glob"
logutils "github.com/argoproj/argo-cd/v2/util/log"
settings_util "github.com/argoproj/argo-cd/v2/util/settings"
)
const (
updateOperationStateTimeout = 1 * time.Second
// orphanedIndex contains application which monitor orphaned resources by namespace
orphanedIndex = "orphaned"
)
type CompareWith int
const (
// Compare live application state against state defined in latest git revision with no resolved revision caching.
CompareWithLatestForceResolve CompareWith = 3
// Compare live application state against state defined in latest git revision.
CompareWithLatest CompareWith = 2
// Compare live application state against state defined using revision of most recent comparison.
CompareWithRecent CompareWith = 1
// Skip comparison and only refresh application resources tree
ComparisonWithNothing CompareWith = 0
)
func (a CompareWith) Max(b CompareWith) CompareWith {
return CompareWith(math.Max(float64(a), float64(b)))
}
func (a CompareWith) Pointer() *CompareWith {
return &a
}
// ApplicationController is the controller for application resources.
type ApplicationController struct {
cache *appstatecache.Cache
namespace string
kubeClientset kubernetes.Interface
kubectl kube.Kubectl
applicationClientset appclientset.Interface
auditLogger *argo.AuditLogger
// queue contains app namespace/name
appRefreshQueue workqueue.RateLimitingInterface
// queue contains app namespace/name/comparisonType and used to request app refresh with the predefined comparison type
appComparisonTypeRefreshQueue workqueue.RateLimitingInterface
appOperationQueue workqueue.RateLimitingInterface
projectRefreshQueue workqueue.RateLimitingInterface
appInformer cache.SharedIndexInformer
appLister applisters.ApplicationLister
projInformer cache.SharedIndexInformer
appStateManager AppStateManager
stateCache statecache.LiveStateCache
statusRefreshTimeout time.Duration
selfHealTimeout time.Duration
repoClientset apiclient.Clientset
db db.ArgoDB
settingsMgr *settings_util.SettingsManager
refreshRequestedApps map[string]CompareWith
refreshRequestedAppsMutex *sync.Mutex
metricsServer *metrics.MetricsServer
kubectlSemaphore *semaphore.Weighted
clusterFilter func(cluster *appv1.Cluster) bool
projByNameCache sync.Map
}
// NewApplicationController creates new instance of ApplicationController.
func NewApplicationController(
namespace string,
settingsMgr *settings_util.SettingsManager,
kubeClientset kubernetes.Interface,
applicationClientset appclientset.Interface,
repoClientset apiclient.Clientset,
argoCache *appstatecache.Cache,
kubectl kube.Kubectl,
appResyncPeriod time.Duration,
selfHealTimeout time.Duration,
metricsPort int,
metricsCacheExpiration time.Duration,
metricsApplicationLabels []string,
kubectlParallelismLimit int64,
clusterFilter func(cluster *appv1.Cluster) bool,
) (*ApplicationController, error) {
log.Infof("appResyncPeriod=%v", appResyncPeriod)
db := db.NewDB(namespace, settingsMgr, kubeClientset)
ctrl := ApplicationController{
cache: argoCache,
namespace: namespace,
kubeClientset: kubeClientset,
kubectl: kubectl,
applicationClientset: applicationClientset,
repoClientset: repoClientset,
appRefreshQueue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "app_reconciliation_queue"),
appOperationQueue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "app_operation_processing_queue"),
projectRefreshQueue: workqueue.NewNamedRateLimitingQueue(workqueue.DefaultControllerRateLimiter(), "project_reconciliation_queue"),
appComparisonTypeRefreshQueue: workqueue.NewRateLimitingQueue(workqueue.DefaultControllerRateLimiter()),
db: db,
statusRefreshTimeout: appResyncPeriod,
refreshRequestedApps: make(map[string]CompareWith),
refreshRequestedAppsMutex: &sync.Mutex{},
auditLogger: argo.NewAuditLogger(namespace, kubeClientset, "argocd-application-controller"),
settingsMgr: settingsMgr,
selfHealTimeout: selfHealTimeout,
clusterFilter: clusterFilter,
projByNameCache: sync.Map{},
}
if kubectlParallelismLimit > 0 {
ctrl.kubectlSemaphore = semaphore.NewWeighted(kubectlParallelismLimit)
}
kubectl.SetOnKubectlRun(ctrl.onKubectlRun)
appInformer, appLister := ctrl.newApplicationInformerAndLister()
indexers := cache.Indexers{cache.NamespaceIndex: cache.MetaNamespaceIndexFunc}
projInformer := v1alpha1.NewAppProjectInformer(applicationClientset, namespace, appResyncPeriod, indexers)
projInformer.AddEventHandler(cache.ResourceEventHandlerFuncs{
AddFunc: func(obj interface{}) {
if key, err := cache.MetaNamespaceKeyFunc(obj); err == nil {
ctrl.projectRefreshQueue.Add(key)
if projMeta, ok := obj.(metav1.Object); ok {
ctrl.InvalidateProjectsCache(projMeta.GetName())
}
}
},
UpdateFunc: func(old, new interface{}) {
if key, err := cache.MetaNamespaceKeyFunc(new); err == nil {
ctrl.projectRefreshQueue.Add(key)
if projMeta, ok := new.(metav1.Object); ok {
ctrl.InvalidateProjectsCache(projMeta.GetName())
}
}
},
DeleteFunc: func(obj interface{}) {
if key, err := cache.DeletionHandlingMetaNamespaceKeyFunc(obj); err == nil {
ctrl.projectRefreshQueue.Add(key)
if projMeta, ok := obj.(metav1.Object); ok {
ctrl.InvalidateProjectsCache(projMeta.GetName())
}
}
},
})
metricsAddr := fmt.Sprintf("0.0.0.0:%d", metricsPort)
var err error
ctrl.metricsServer, err = metrics.NewMetricsServer(metricsAddr, appLister, ctrl.canProcessApp, func(r *http.Request) error {
return nil
}, metricsApplicationLabels)
if err != nil {
return nil, err
}
if metricsCacheExpiration.Seconds() != 0 {
err = ctrl.metricsServer.SetExpiration(metricsCacheExpiration)
if err != nil {
return nil, err
}
}
stateCache := statecache.NewLiveStateCache(db, appInformer, ctrl.settingsMgr, kubectl, ctrl.metricsServer, ctrl.handleObjectUpdated, clusterFilter, argo.NewResourceTracking())
appStateManager := NewAppStateManager(db, applicationClientset, repoClientset, namespace, kubectl, ctrl.settingsMgr, stateCache, projInformer, ctrl.metricsServer, argoCache, ctrl.statusRefreshTimeout, argo.NewResourceTracking())
ctrl.appInformer = appInformer
ctrl.appLister = appLister
ctrl.projInformer = projInformer
ctrl.appStateManager = appStateManager
ctrl.stateCache = stateCache
return &ctrl, nil
}
func (ctrl *ApplicationController) InvalidateProjectsCache(names ...string) {
if len(names) > 0 {
for _, name := range names {
ctrl.projByNameCache.Delete(name)
}
} else {
ctrl.projByNameCache.Range(func(key, _ interface{}) bool {
ctrl.projByNameCache.Delete(key)
return true
})
}
}
func (ctrl *ApplicationController) GetMetricsServer() *metrics.MetricsServer {
return ctrl.metricsServer
}
func (ctrl *ApplicationController) onKubectlRun(command string) (kube.CleanupFunc, error) {
ctrl.metricsServer.IncKubectlExec(command)
if ctrl.kubectlSemaphore != nil {
if err := ctrl.kubectlSemaphore.Acquire(context.Background(), 1); err != nil {
return nil, err
}
ctrl.metricsServer.IncKubectlExecPending(command)
}
return func() {
if ctrl.kubectlSemaphore != nil {
ctrl.kubectlSemaphore.Release(1)
ctrl.metricsServer.DecKubectlExecPending(command)
}
}, nil
}
func isSelfReferencedApp(app *appv1.Application, ref v1.ObjectReference) bool {
gvk := ref.GroupVersionKind()
return ref.UID == app.UID &&
ref.Name == app.Name &&
ref.Namespace == app.Namespace &&
gvk.Group == application.Group &&
gvk.Kind == application.ApplicationKind
}
func (ctrl *ApplicationController) newAppProjCache(name string) *appProjCache {
return &appProjCache{name: name, ctrl: ctrl}
}
type appProjCache struct {
name string
ctrl *ApplicationController
lock sync.Mutex
appProj *appv1.AppProject
}
func (projCache *appProjCache) GetAppProject(ctx context.Context) (*appv1.AppProject, error) {
projCache.lock.Lock()
defer projCache.lock.Unlock()
if projCache.appProj != nil {
return projCache.appProj, nil
}
proj, err := argo.GetAppProjectByName(projCache.name, applisters.NewAppProjectLister(projCache.ctrl.projInformer.GetIndexer()), projCache.ctrl.namespace, projCache.ctrl.settingsMgr, projCache.ctrl.db, ctx)
if err != nil {
return nil, err
}
projCache.appProj = proj
return projCache.appProj, nil
}
func (ctrl *ApplicationController) getAppProj(app *appv1.Application) (*appv1.AppProject, error) {
projCache, _ := ctrl.projByNameCache.LoadOrStore(app.Spec.GetProject(), ctrl.newAppProjCache(app.Spec.GetProject()))
return projCache.(*appProjCache).GetAppProject(context.TODO())
}
func (ctrl *ApplicationController) handleObjectUpdated(managedByApp map[string]bool, ref v1.ObjectReference) {
// if namespaced resource is not managed by any app it might be orphaned resource of some other apps
if len(managedByApp) == 0 && ref.Namespace != "" {
// retrieve applications which monitor orphaned resources in the same namespace and refresh them unless resource is denied in app project
if objs, err := ctrl.appInformer.GetIndexer().ByIndex(orphanedIndex, ref.Namespace); err == nil {
for i := range objs {
app, ok := objs[i].(*appv1.Application)
if !ok {
continue
}
managedByApp[app.Name] = true
}
}
}
for appName, isManagedResource := range managedByApp {
obj, exists, err := ctrl.appInformer.GetIndexer().GetByKey(ctrl.namespace + "/" + appName)
if app, ok := obj.(*appv1.Application); exists && err == nil && ok && isSelfReferencedApp(app, ref) {
// Don't force refresh app if related resource is application itself. This prevents infinite reconciliation loop.
continue
}
if !ctrl.canProcessApp(obj) {
// Don't force refresh app if app belongs to a different controller shard
continue
}
level := ComparisonWithNothing
if isManagedResource {
level = CompareWithRecent
}
// Additional check for debug level so we don't need to evaluate the
// format string in case of non-debug scenarios
if log.GetLevel() >= log.DebugLevel {
var resKey string
if ref.Namespace != "" {
resKey = ref.Namespace + "/" + ref.Name
} else {
resKey = "(cluster-scoped)/" + ref.Name
}
log.Debugf("Refreshing app %s for change in cluster of object %s of type %s/%s", appName, resKey, ref.APIVersion, ref.Kind)
}
ctrl.requestAppRefresh(appName, &level, nil)
}
}
// setAppManagedResources will build a list of ResourceDiff based on the provided comparisonResult
// and persist app resources related data in the cache. Will return the persisted ApplicationTree.
func (ctrl *ApplicationController) setAppManagedResources(a *appv1.Application, comparisonResult *comparisonResult) (*appv1.ApplicationTree, error) {
managedResources, err := ctrl.hideSecretData(a, comparisonResult)
if err != nil {
return nil, fmt.Errorf("error getting managed resources: %s", err)
}
tree, err := ctrl.getResourceTree(a, managedResources)
if err != nil {
return nil, fmt.Errorf("error getting resource tree: %s", err)
}
err = ctrl.cache.SetAppResourcesTree(a.Name, tree)
if err != nil {
return nil, fmt.Errorf("error setting app resource tree: %s", err)
}
err = ctrl.cache.SetAppManagedResources(a.Name, managedResources)
if err != nil {
return nil, fmt.Errorf("error setting app managed resources: %s", err)
}
return tree, nil
}
// returns true of given resources exist in the namespace by default and not managed by the user
func isKnownOrphanedResourceExclusion(key kube.ResourceKey, proj *appv1.AppProject) bool {
if key.Namespace == "default" && key.Group == "" && key.Kind == kube.ServiceKind && key.Name == "kubernetes" {
return true
}
if key.Group == "" && key.Kind == kube.ServiceAccountKind && key.Name == "default" {
return true
}
if key.Group == "" && key.Kind == "ConfigMap" && key.Name == "kube-root-ca.crt" {
return true
}
list := proj.Spec.OrphanedResources.Ignore
for _, item := range list {
if item.Kind == "" || glob.Match(item.Kind, key.Kind) {
if glob.Match(item.Group, key.Group) {
if item.Name == "" || glob.Match(item.Name, key.Name) {
return true
}
}
}
}
return false
}
func (ctrl *ApplicationController) getResourceTree(a *appv1.Application, managedResources []*appv1.ResourceDiff) (*appv1.ApplicationTree, error) {
nodes := make([]appv1.ResourceNode, 0)
proj, err := ctrl.getAppProj(a)
if err != nil {
return nil, err
}
orphanedNodesMap := make(map[kube.ResourceKey]appv1.ResourceNode)
warnOrphaned := true
if proj.Spec.OrphanedResources != nil {
orphanedNodesMap, err = ctrl.stateCache.GetNamespaceTopLevelResources(a.Spec.Destination.Server, a.Spec.Destination.Namespace)
if err != nil {
return nil, err
}
warnOrphaned = proj.Spec.OrphanedResources.IsWarn()
}
for i := range managedResources {
managedResource := managedResources[i]
delete(orphanedNodesMap, kube.NewResourceKey(managedResource.Group, managedResource.Kind, managedResource.Namespace, managedResource.Name))
var live = &unstructured.Unstructured{}
err := json.Unmarshal([]byte(managedResource.LiveState), &live)
if err != nil {
return nil, err
}
var target = &unstructured.Unstructured{}
err = json.Unmarshal([]byte(managedResource.TargetState), &target)
if err != nil {
return nil, err
}
if live == nil {
nodes = append(nodes, appv1.ResourceNode{
ResourceRef: appv1.ResourceRef{
Version: target.GroupVersionKind().Version,
Name: managedResource.Name,
Kind: managedResource.Kind,
Group: managedResource.Group,
Namespace: managedResource.Namespace,
},
})
} else {
err := ctrl.stateCache.IterateHierarchy(a.Spec.Destination.Server, kube.GetResourceKey(live), func(child appv1.ResourceNode, appName string) {
nodes = append(nodes, child)
})
if err != nil {
return nil, err
}
}
}
orphanedNodes := make([]appv1.ResourceNode, 0)
for k := range orphanedNodesMap {
if k.Namespace != "" && proj.IsGroupKindPermitted(k.GroupKind(), true) && !isKnownOrphanedResourceExclusion(k, proj) {
err := ctrl.stateCache.IterateHierarchy(a.Spec.Destination.Server, k, func(child appv1.ResourceNode, appName string) {
belongToAnotherApp := false
if appName != "" {
if _, exists, err := ctrl.appInformer.GetIndexer().GetByKey(ctrl.namespace + "/" + appName); exists && err == nil {
belongToAnotherApp = true
}
}
if !belongToAnotherApp {
orphanedNodes = append(orphanedNodes, child)
}
})
if err != nil {
return nil, err
}
}
}
var conditions []appv1.ApplicationCondition
if len(orphanedNodes) > 0 && warnOrphaned {
conditions = []appv1.ApplicationCondition{{
Type: appv1.ApplicationConditionOrphanedResourceWarning,
Message: fmt.Sprintf("Application has %d orphaned resources", len(orphanedNodes)),
}}
}
a.Status.SetConditions(conditions, map[appv1.ApplicationConditionType]bool{appv1.ApplicationConditionOrphanedResourceWarning: true})
sort.Slice(orphanedNodes, func(i, j int) bool {
return orphanedNodes[i].ResourceRef.String() < orphanedNodes[j].ResourceRef.String()
})
hosts, err := ctrl.getAppHosts(a, nodes)
if err != nil {
return nil, err
}
return &appv1.ApplicationTree{Nodes: nodes, OrphanedNodes: orphanedNodes, Hosts: hosts}, nil
}
func (ctrl *ApplicationController) getAppHosts(a *appv1.Application, appNodes []appv1.ResourceNode) ([]appv1.HostInfo, error) {
supportedResourceNames := map[v1.ResourceName]bool{
v1.ResourceCPU: true,
v1.ResourceStorage: true,
v1.ResourceMemory: true,
}
appPods := map[kube.ResourceKey]bool{}
for _, node := range appNodes {
if node.Group == "" && node.Kind == kube.PodKind {
appPods[kube.NewResourceKey(node.Group, node.Kind, node.Namespace, node.Name)] = true
}
}
allNodesInfo := map[string]statecache.NodeInfo{}
allPodsByNode := map[string][]statecache.PodInfo{}
appPodsByNode := map[string][]statecache.PodInfo{}
err := ctrl.stateCache.IterateResources(a.Spec.Destination.Server, func(res *clustercache.Resource, info *statecache.ResourceInfo) {
key := res.ResourceKey()
switch {
case info.NodeInfo != nil && key.Group == "" && key.Kind == "Node":
allNodesInfo[key.Name] = *info.NodeInfo
case info.PodInfo != nil && key.Group == "" && key.Kind == kube.PodKind:
if appPods[key] {
appPodsByNode[info.PodInfo.NodeName] = append(appPodsByNode[info.PodInfo.NodeName], *info.PodInfo)
} else {
allPodsByNode[info.PodInfo.NodeName] = append(allPodsByNode[info.PodInfo.NodeName], *info.PodInfo)
}
}
})
if err != nil {
return nil, err
}
var hosts []appv1.HostInfo
for nodeName, appPods := range appPodsByNode {
node, ok := allNodesInfo[nodeName]
if !ok {
continue
}
neighbors := allPodsByNode[nodeName]
resources := map[v1.ResourceName]appv1.HostResourceInfo{}
for name, resource := range node.Capacity {
info := resources[name]
info.ResourceName = name
info.Capacity += resource.MilliValue()
resources[name] = info
}
for _, pod := range appPods {
for name, resource := range pod.ResourceRequests {
if !supportedResourceNames[name] {
continue
}
info := resources[name]
info.RequestedByApp += resource.MilliValue()
resources[name] = info
}
}
for _, pod := range neighbors {
for name, resource := range pod.ResourceRequests {
if !supportedResourceNames[name] || pod.Phase == v1.PodSucceeded || pod.Phase == v1.PodFailed {
continue
}
info := resources[name]
info.RequestedByNeighbors += resource.MilliValue()
resources[name] = info
}
}
var resourcesInfo []appv1.HostResourceInfo
for _, info := range resources {
if supportedResourceNames[info.ResourceName] && info.Capacity > 0 {
resourcesInfo = append(resourcesInfo, info)
}
}
sort.Slice(resourcesInfo, func(i, j int) bool {
return resourcesInfo[i].ResourceName < resourcesInfo[j].ResourceName
})
hosts = append(hosts, appv1.HostInfo{Name: nodeName, SystemInfo: node.SystemInfo, ResourcesInfo: resourcesInfo})
}
return hosts, nil
}
func (ctrl *ApplicationController) hideSecretData(app *appv1.Application, comparisonResult *comparisonResult) ([]*appv1.ResourceDiff, error) {
items := make([]*appv1.ResourceDiff, len(comparisonResult.managedResources))
for i := range comparisonResult.managedResources {
res := comparisonResult.managedResources[i]
item := appv1.ResourceDiff{
Namespace: res.Namespace,
Name: res.Name,
Group: res.Group,
Kind: res.Kind,
Hook: res.Hook,
ResourceVersion: res.ResourceVersion,
}
target := res.Target
live := res.Live
resDiff := res.Diff
if res.Kind == kube.SecretKind && res.Group == "" {
var err error
target, live, err = diff.HideSecretData(res.Target, res.Live)
if err != nil {
return nil, fmt.Errorf("error hiding secret data: %s", err)
}
compareOptions, err := ctrl.settingsMgr.GetResourceCompareOptions()
if err != nil {
return nil, fmt.Errorf("error getting resource compare options: %s", err)
}
resourceOverrides, err := ctrl.settingsMgr.GetResourceOverrides()
if err != nil {
return nil, fmt.Errorf("error getting resource overrides: %s", err)
}
appLabelKey, err := ctrl.settingsMgr.GetAppInstanceLabelKey()
if err != nil {
return nil, fmt.Errorf("error getting app instance label key: %s", err)
}
trackingMethod, err := ctrl.settingsMgr.GetTrackingMethod()
if err != nil {
return nil, fmt.Errorf("error getting tracking method: %s", err)
}
diffConfig, err := argodiff.NewDiffConfigBuilder().
WithDiffSettings(app.Spec.IgnoreDifferences, resourceOverrides, compareOptions.IgnoreAggregatedRoles).
WithTracking(appLabelKey, trackingMethod).
WithNoCache().
WithLogger(logutils.NewLogrusLogger(logutils.NewWithCurrentConfig())).
Build()
if err != nil {
return nil, fmt.Errorf("appcontroller error building diff config: %s", err)
}
diffResult, err := argodiff.StateDiff(live, target, diffConfig)
if err != nil {
return nil, fmt.Errorf("error applying diff: %s", err)
}
resDiff = diffResult
}
if live != nil {
data, err := json.Marshal(live)
if err != nil {
return nil, fmt.Errorf("error marshaling live json: %s", err)
}
item.LiveState = string(data)
} else {
item.LiveState = "null"
}
if target != nil {
data, err := json.Marshal(target)
if err != nil {
return nil, fmt.Errorf("error marshaling target json: %s", err)
}
item.TargetState = string(data)
} else {
item.TargetState = "null"
}
item.PredictedLiveState = string(resDiff.PredictedLive)
item.NormalizedLiveState = string(resDiff.NormalizedLive)
item.Modified = resDiff.Modified
items[i] = &item
}
return items, nil
}
// Run starts the Application CRD controller.
func (ctrl *ApplicationController) Run(ctx context.Context, statusProcessors int, operationProcessors int) {
defer runtime.HandleCrash()
defer ctrl.appRefreshQueue.ShutDown()
defer ctrl.appComparisonTypeRefreshQueue.ShutDown()
defer ctrl.appOperationQueue.ShutDown()
defer ctrl.projectRefreshQueue.ShutDown()
ctrl.metricsServer.RegisterClustersInfoSource(ctx, ctrl.stateCache)
ctrl.RegisterClusterSecretUpdater(ctx)
go ctrl.appInformer.Run(ctx.Done())
go ctrl.projInformer.Run(ctx.Done())
errors.CheckError(ctrl.stateCache.Init())
if !cache.WaitForCacheSync(ctx.Done(), ctrl.appInformer.HasSynced, ctrl.projInformer.HasSynced) {
log.Error("Timed out waiting for caches to sync")
return
}
go func() { errors.CheckError(ctrl.stateCache.Run(ctx)) }()
go func() { errors.CheckError(ctrl.metricsServer.ListenAndServe()) }()
for i := 0; i < statusProcessors; i++ {
go wait.Until(func() {
for ctrl.processAppRefreshQueueItem() {
}
}, time.Second, ctx.Done())
}
for i := 0; i < operationProcessors; i++ {
go wait.Until(func() {
for ctrl.processAppOperationQueueItem() {
}
}, time.Second, ctx.Done())
}
go wait.Until(func() {
for ctrl.processAppComparisonTypeQueueItem() {
}
}, time.Second, ctx.Done())
go wait.Until(func() {
for ctrl.processProjectQueueItem() {
}
}, time.Second, ctx.Done())
<-ctx.Done()
}
func (ctrl *ApplicationController) requestAppRefresh(appName string, compareWith *CompareWith, after *time.Duration) {
key := fmt.Sprintf("%s/%s", ctrl.namespace, appName)
if compareWith != nil && after != nil {
ctrl.appComparisonTypeRefreshQueue.AddAfter(fmt.Sprintf("%s/%d", key, compareWith), *after)
} else {
if compareWith != nil {
ctrl.refreshRequestedAppsMutex.Lock()
ctrl.refreshRequestedApps[appName] = compareWith.Max(ctrl.refreshRequestedApps[appName])
ctrl.refreshRequestedAppsMutex.Unlock()
}
if after != nil {
ctrl.appRefreshQueue.AddAfter(key, *after)
ctrl.appOperationQueue.AddAfter(key, *after)
} else {
ctrl.appRefreshQueue.Add(key)
ctrl.appOperationQueue.Add(key)
}
}
}
func (ctrl *ApplicationController) isRefreshRequested(appName string) (bool, CompareWith) {
ctrl.refreshRequestedAppsMutex.Lock()
defer ctrl.refreshRequestedAppsMutex.Unlock()
level, ok := ctrl.refreshRequestedApps[appName]
if ok {
delete(ctrl.refreshRequestedApps, appName)
}
return ok, level
}
func (ctrl *ApplicationController) processAppOperationQueueItem() (processNext bool) {
appKey, shutdown := ctrl.appOperationQueue.Get()
if shutdown {
processNext = false
return
}
processNext = true
defer func() {
if r := recover(); r != nil {
log.Errorf("Recovered from panic: %+v\n%s", r, debug.Stack())
}
ctrl.appOperationQueue.Done(appKey)
}()
obj, exists, err := ctrl.appInformer.GetIndexer().GetByKey(appKey.(string))
if err != nil {
log.Errorf("Failed to get application '%s' from informer index: %+v", appKey, err)
return
}
if !exists {
// This happens after app was deleted, but the work queue still had an entry for it.
return
}
origApp, ok := obj.(*appv1.Application)
if !ok {
log.Warnf("Key '%s' in index is not an application", appKey)
return
}
app := origApp.DeepCopy()
if app.Operation != nil {
// If we get here, we are about process an operation but we cannot rely on informer since it might has stale data.
// So always retrieve the latest version to ensure it is not stale to avoid unnecessary syncing.
// We cannot rely on informer since applications might be updated by both application controller and api server.
freshApp, err := ctrl.applicationClientset.ArgoprojV1alpha1().Applications(ctrl.namespace).Get(context.Background(), app.ObjectMeta.Name, metav1.GetOptions{})
if err != nil {
log.Errorf("Failed to retrieve latest application state: %v", err)
return
}
app = freshApp
}
if app.Operation != nil {
ctrl.processRequestedAppOperation(app)
} else if app.DeletionTimestamp != nil && app.CascadedDeletion() {
_, err = ctrl.finalizeApplicationDeletion(app)
if err != nil {
ctrl.setAppCondition(app, appv1.ApplicationCondition{
Type: appv1.ApplicationConditionDeletionError,
Message: err.Error(),
})
message := fmt.Sprintf("Unable to delete application resources: %v", err.Error())
ctrl.auditLogger.LogAppEvent(app, argo.EventInfo{Reason: argo.EventReasonStatusRefreshed, Type: v1.EventTypeWarning}, message)
}
}
return
}
func (ctrl *ApplicationController) processAppComparisonTypeQueueItem() (processNext bool) {
key, shutdown := ctrl.appComparisonTypeRefreshQueue.Get()
processNext = true
defer func() {
if r := recover(); r != nil {
log.Errorf("Recovered from panic: %+v\n%s", r, debug.Stack())
}
ctrl.appComparisonTypeRefreshQueue.Done(key)
}()
if shutdown {
processNext = false
return
}
if parts := strings.Split(key.(string), "/"); len(parts) != 3 {
log.Warnf("Unexpected key format in appComparisonTypeRefreshTypeQueue. Key should consists of namespace/name/comparisonType but got: %s", key.(string))
} else {
if compareWith, err := strconv.Atoi(parts[2]); err != nil {
log.Warnf("Unable to parse comparison type: %v", err)
return
} else {
ctrl.requestAppRefresh(parts[1], CompareWith(compareWith).Pointer(), nil)
}
}
return
}
func (ctrl *ApplicationController) processProjectQueueItem() (processNext bool) {
key, shutdown := ctrl.projectRefreshQueue.Get()
processNext = true
defer func() {
if r := recover(); r != nil {
log.Errorf("Recovered from panic: %+v\n%s", r, debug.Stack())
}
ctrl.projectRefreshQueue.Done(key)
}()
if shutdown {
processNext = false
return
}
obj, exists, err := ctrl.projInformer.GetIndexer().GetByKey(key.(string))
if err != nil {
log.Errorf("Failed to get project '%s' from informer index: %+v", key, err)
return
}
if !exists {
// This happens after appproj was deleted, but the work queue still had an entry for it.
return
}
origProj, ok := obj.(*appv1.AppProject)
if !ok {
log.Warnf("Key '%s' in index is not an appproject", key)
return
}
if origProj.DeletionTimestamp != nil && origProj.HasFinalizer() {
if err := ctrl.finalizeProjectDeletion(origProj.DeepCopy()); err != nil {
log.Warnf("Failed to finalize project deletion: %v", err)
}
}
return
}
func (ctrl *ApplicationController) finalizeProjectDeletion(proj *appv1.AppProject) error {
apps, err := ctrl.appLister.Applications(ctrl.namespace).List(labels.Everything())
if err != nil {
return err
}
appsCount := 0
for i := range apps {
if apps[i].Spec.GetProject() == proj.Name {
appsCount++
}
}
if appsCount == 0 {
return ctrl.removeProjectFinalizer(proj)
} else {
log.Infof("Cannot remove project '%s' finalizer as is referenced by %d applications", proj.Name, appsCount)
}
return nil
}
func (ctrl *ApplicationController) removeProjectFinalizer(proj *appv1.AppProject) error {
proj.RemoveFinalizer()
var patch []byte
patch, _ = json.Marshal(map[string]interface{}{
"metadata": map[string]interface{}{
"finalizers": proj.Finalizers,
},
})
_, err := ctrl.applicationClientset.ArgoprojV1alpha1().AppProjects(ctrl.namespace).Patch(context.Background(), proj.Name, types.MergePatchType, patch, metav1.PatchOptions{})
return err
}
// shouldBeDeleted returns whether a given resource obj should be deleted on cascade delete of application app
func (ctrl *ApplicationController) shouldBeDeleted(app *appv1.Application, obj *unstructured.Unstructured) bool {
return !kube.IsCRD(obj) && !isSelfReferencedApp(app, kube.GetObjectRef(obj))
}
func (ctrl *ApplicationController) getPermittedAppLiveObjects(app *appv1.Application, proj *appv1.AppProject) (map[kube.ResourceKey]*unstructured.Unstructured, error) {
objsMap, err := ctrl.stateCache.GetManagedLiveObjs(app, []*unstructured.Unstructured{})
if err != nil {
return nil, err
}
// Don't delete live resources which are not permitted in the app project
for k, v := range objsMap {
if !proj.IsLiveResourcePermitted(v, app.Spec.Destination.Server, app.Spec.Destination.Name) {
delete(objsMap, k)
}
}
return objsMap, nil
}
func (ctrl *ApplicationController) finalizeApplicationDeletion(app *appv1.Application) ([]*unstructured.Unstructured, error) {
logCtx := log.WithField("application", app.Name)
logCtx.Infof("Deleting resources")
// Get refreshed application info, since informer app copy might be stale
app, err := ctrl.applicationClientset.ArgoprojV1alpha1().Applications(app.Namespace).Get(context.Background(), app.Name, metav1.GetOptions{})
if err != nil {
if !apierr.IsNotFound(err) {
logCtx.Errorf("Unable to get refreshed application info prior deleting resources: %v", err)
}
return nil, nil
}
proj, err := ctrl.getAppProj(app)
if err != nil {
return nil, err
}
// validDestination is true if the Application destination points to a cluster that is managed by Argo CD
// (and thus either a cluster secret exists for it, or it's local); validDestination is false otherwise.
validDestination := true
// Validate the cluster using the Application destination's `name` field, if applicable,
// and set the Server field, if needed.
if err := argo.ValidateDestination(context.Background(), &app.Spec.Destination, ctrl.db); err != nil {
log.Warnf("Unable to validate destination of the Application being deleted: %v", err)
validDestination = false
}
objs := make([]*unstructured.Unstructured, 0)
var cluster *appv1.Cluster
// Attempt to validate the destination via its URL
if validDestination {
if cluster, err = ctrl.db.GetCluster(context.Background(), app.Spec.Destination.Server); err != nil {
log.Warnf("Unable to locate cluster URL for Application being deleted: %v", err)
validDestination = false
}
}
if validDestination {
// ApplicationDestination points to a valid cluster, so we may clean up the live objects
objsMap, err := ctrl.getPermittedAppLiveObjects(app, proj)
if err != nil {
return nil, err
}
for k := range objsMap {
// Wait for objects pending deletion to complete before proceeding with next sync wave
if objsMap[k].GetDeletionTimestamp() != nil {
logCtx.Infof("%d objects remaining for deletion", len(objsMap))
return objs, nil
}
if ctrl.shouldBeDeleted(app, objsMap[k]) {
objs = append(objs, objsMap[k])
}
}
config := metrics.AddMetricsTransportWrapper(ctrl.metricsServer, app, cluster.RESTConfig())
filteredObjs := FilterObjectsForDeletion(objs)
propagationPolicy := metav1.DeletePropagationForeground
if app.GetPropagationPolicy() == appv1.BackgroundPropagationPolicyFinalizer {
propagationPolicy = metav1.DeletePropagationBackground
}
logCtx.Infof("Deleting application's resources with %s propagation policy", propagationPolicy)
err = kube.RunAllAsync(len(filteredObjs), func(i int) error {
obj := filteredObjs[i]
return ctrl.kubectl.DeleteResource(context.Background(), config, obj.GroupVersionKind(), obj.GetName(), obj.GetNamespace(), metav1.DeleteOptions{PropagationPolicy: &propagationPolicy})
})
if err != nil {
return objs, err
}
objsMap, err = ctrl.getPermittedAppLiveObjects(app, proj)
if err != nil {
return nil, err
}
for k, obj := range objsMap {
if !ctrl.shouldBeDeleted(app, obj) {
delete(objsMap, k)
}
}
if len(objsMap) > 0 {
logCtx.Infof("%d objects remaining for deletion", len(objsMap))
return objs, nil
}
}
if err := ctrl.cache.SetAppManagedResources(app.Name, nil); err != nil {
return objs, err
}
if err := ctrl.cache.SetAppResourcesTree(app.Name, nil); err != nil {
return objs, err
}
if err := ctrl.removeCascadeFinalizer(app); err != nil {
return objs, err
}