clusteroperator: Report when OLM reaches "level" and check syncs

smarterclayton · ecordell · commit 1c107301d899 · 2019-03-15T07:50:23.000-04:00
Cluster operators are expected to report the version of the payload
they are included in once they are "deployed", and also to keep the
cluster operator object created. Have the OLM operator keep CO up
to date, report the payload version once it hits available, and use
the count of successful syncs from the queueInformers as a probalistic
measurement of "available" (i.e. is the operator able to retire syncs).
A future change should add a "health over time" metric or a "has
successfully synced all InstallPlans at least once" metric to replace
the current estimation.
diff --git a/cmd/catalog/main.go b/cmd/catalog/main.go
@@ -96,6 +96,6 @@ func main() {
 	http.Handle("/metrics", promhttp.Handler())
 	go http.ListenAndServe(":8081", nil)
 
-	_, done := catalogOperator.Run(stopCh)
+	_, done, _ := catalogOperator.Run(stopCh)
 	<-done
 }
diff --git a/cmd/olm/main.go b/cmd/olm/main.go
@@ -5,6 +5,7 @@ import (
 	"fmt"
 	"net/http"
 	"os"
+	"reflect"
 	"strings"
 	"time"
 
@@ -13,21 +14,20 @@ import (
 	v1 "k8s.io/api/core/v1"
 	k8serrors "k8s.io/apimachinery/pkg/api/errors"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/apimachinery/pkg/util/wait"
+	"k8s.io/client-go/discovery"
+	"k8s.io/client-go/tools/clientcmd"
 
 	configv1 "github.com/openshift/api/config/v1"
 	configv1client "github.com/openshift/client-go/config/clientset/versioned/typed/config/v1"
-	clusteroperatorv1helpers "github.com/openshift/library-go/pkg/config/clusteroperator/v1helpers"
-	operatorv1helpers "github.com/openshift/library-go/pkg/operator/v1helpers"
 	"github.com/operator-framework/operator-lifecycle-manager/pkg/api/client"
 	"github.com/operator-framework/operator-lifecycle-manager/pkg/controller/install"
 	"github.com/operator-framework/operator-lifecycle-manager/pkg/controller/operators/olm"
 	"github.com/operator-framework/operator-lifecycle-manager/pkg/lib/operatorclient"
 	"github.com/operator-framework/operator-lifecycle-manager/pkg/lib/signals"
 	"github.com/operator-framework/operator-lifecycle-manager/pkg/metrics"
 	olmversion "github.com/operator-framework/operator-lifecycle-manager/pkg/version"
-	"k8s.io/apimachinery/pkg/runtime/schema"
-	"k8s.io/client-go/discovery"
-	"k8s.io/client-go/tools/clientcmd"
 )
 
 const (
@@ -128,98 +128,198 @@ func main() {
 	http.Handle("/metrics", promhttp.Handler())
 	go http.ListenAndServe(":8081", nil)
 
-	ready, done := operator.Run(stopCh)
+	ready, done, sync := operator.Run(stopCh)
 	<-ready
 
 	if *writeStatusName != "" {
-		opStatusGV := schema.GroupVersion{
-			Group:   "config.openshift.io",
-			Version: "v1",
+		monitorClusterStatus(sync, stopCh, opClient, configClient)
+	}
+
+	<-done
+}
+
+func monitorClusterStatus(syncCh chan error, stopCh <-chan struct{}, opClient operatorclient.ClientInterface, configClient configv1client.ConfigV1Interface) {
+	var (
+		syncs              int
+		successfulSyncs    int
+		hasClusterOperator bool
+	)
+	go wait.Until(func() {
+		// slow poll until we see a cluster operator API, which could be never
+		if !hasClusterOperator {
+			opStatusGV := schema.GroupVersion{
+				Group:   "config.openshift.io",
+				Version: "v1",
+			}
+			err := discovery.ServerSupportsVersion(opClient.KubernetesInterface().Discovery(), opStatusGV)
+			if err != nil {
+				log.Infof("ClusterOperator api not present, skipping update (%v)", err)
+				time.Sleep(time.Minute)
+				return
+			}
+			hasClusterOperator = true
 		}
-		err := discovery.ServerSupportsVersion(opClient.KubernetesInterface().Discovery(), opStatusGV)
-		if err != nil {
-			log.Infof("ClusterOperator api not present, skipping update (%v)", err)
-		} else {
-			existing, err := configClient.ClusterOperators().Get(*writeStatusName, metav1.GetOptions{})
-			if k8serrors.IsNotFound(err) {
-				log.Info("Existing operator status not found, creating")
-				created, err := configClient.ClusterOperators().Create(&configv1.ClusterOperator{
-					ObjectMeta: metav1.ObjectMeta{
-						Name: *writeStatusName,
-					},
-				})
-				if err != nil {
-					log.Fatalf("ClusterOperator create failed: %v\n", err)
+
+		// Sample the sync channel and see whether we're successfully retiring syncs as a
+		// proxy for "working" (we can't know when we hit level, but we can at least verify
+		// we are seeing some syncs succeeding). Once we observe at least one successful
+		// sync we can begin reporting available and level.
+		select {
+		case err, ok := <-syncCh:
+			if !ok {
+				// syncCh should only close if the Run() loop exits
+				time.Sleep(5 * time.Second)
+				log.Fatalf("Status sync channel closed but process did not exit in time")
+			}
+			syncs++
+			if err == nil {
+				successfulSyncs++
+			}
+			// grab any other sync events that have accumulated
+			for len(syncCh) > 0 {
+				if err := <-syncCh; err == nil {
+					successfulSyncs++
 				}
+				syncs++
+			}
+			// if we haven't yet accumulated enough syncs, wait longer
+			// TODO: replace these magic numbers with a better measure of syncs across all queueInformers
+			if successfulSyncs < 5 || syncs < 10 {
+				log.Printf("Waiting to observe more successful syncs")
+				return
+			}
+		}
 
-				created.Status = configv1.ClusterOperatorStatus{
+		// create the cluster operator in an initial state if it does not exist
+		existing, err := configClient.ClusterOperators().Get(*writeStatusName, metav1.GetOptions{})
+		if k8serrors.IsNotFound(err) {
+			log.Info("Existing operator status not found, creating")
+			created, createErr := configClient.ClusterOperators().Create(&configv1.ClusterOperator{
+				ObjectMeta: metav1.ObjectMeta{
+					Name: *writeStatusName,
+				},
+				Status: configv1.ClusterOperatorStatus{
 					Conditions: []configv1.ClusterOperatorStatusCondition{
 						configv1.ClusterOperatorStatusCondition{
 							Type:               configv1.OperatorProgressing,
-							Status:             configv1.ConditionFalse,
-							Message:            fmt.Sprintf("Done deploying %s.", olmversion.OLMVersion),
+							Status:             configv1.ConditionTrue,
+							Message:            fmt.Sprintf("Installing %s", olmversion.OLMVersion),
 							LastTransitionTime: metav1.Now(),
 						},
 						configv1.ClusterOperatorStatusCondition{
 							Type:               configv1.OperatorFailing,
 							Status:             configv1.ConditionFalse,
-							Message:            fmt.Sprintf("Done deploying %s.", olmversion.OLMVersion),
 							LastTransitionTime: metav1.Now(),
 						},
 						configv1.ClusterOperatorStatusCondition{
 							Type:               configv1.OperatorAvailable,
-							Status:             configv1.ConditionTrue,
-							Message:            fmt.Sprintf("Done deploying %s.", olmversion.OLMVersion),
+							Status:             configv1.ConditionFalse,
 							LastTransitionTime: metav1.Now(),
 						},
 					},
-					Versions: []configv1.OperandVersion{{
+				},
+			})
+			if createErr != nil {
+				log.Errorf("Failed to create cluster operator: %v\n", createErr)
+				return
+			}
+			existing = created
+			err = nil
+		}
+		if err != nil {
+			log.Errorf("Unable to retrieve cluster operator: %v", err)
+			return
+		}
+
+		// update the status with the appropriate state
+		previousStatus := existing.Status.DeepCopy()
+		switch {
+		case successfulSyncs > 0:
+			setOperatorStatusCondition(&existing.Status.Conditions, configv1.ClusterOperatorStatusCondition{
+				Type:   configv1.OperatorFailing,
+				Status: configv1.ConditionFalse,
+			})
+			setOperatorStatusCondition(&existing.Status.Conditions, configv1.ClusterOperatorStatusCondition{
+				Type:    configv1.OperatorProgressing,
+				Status:  configv1.ConditionFalse,
+				Message: fmt.Sprintf("Deployed %s", olmversion.OLMVersion),
+			})
+			setOperatorStatusCondition(&existing.Status.Conditions, configv1.ClusterOperatorStatusCondition{
+				Type:   configv1.OperatorAvailable,
+				Status: configv1.ConditionTrue,
+			})
+			// we set the versions array when all the latest code is deployed and running - in this case,
+			// the sync method is responsible for guaranteeing that happens before it returns nil
+			if version := os.Getenv("RELEASE_VERSION"); len(version) > 0 {
+				existing.Status.Versions = []configv1.OperandVersion{
+					{
 						Name:    "operator",
-						Version: olmversion.Full(),
-					}},
-				}
-				_, err = configClient.ClusterOperators().UpdateStatus(created)
-				if err != nil {
-					log.Fatalf("ClusterOperator update status failed: %v", err)
+						Version: version,
+					},
+					{
+						Name:    "operator-lifecycle-manager",
+						Version: olmversion.OLMVersion,
+					},
 				}
-			} else if err != nil {
-				log.Fatalf("ClusterOperators get failed: %v", err)
 			} else {
-				clusteroperatorv1helpers.SetStatusCondition(&existing.Status.Conditions, configv1.ClusterOperatorStatusCondition{
-					Type:               configv1.OperatorProgressing,
-					Status:             configv1.ConditionFalse,
-					Message:            fmt.Sprintf("Done deploying %s.", olmversion.OLMVersion),
-					LastTransitionTime: metav1.Now(),
-				})
-				clusteroperatorv1helpers.SetStatusCondition(&existing.Status.Conditions, configv1.ClusterOperatorStatusCondition{
-					Type:               configv1.OperatorFailing,
-					Status:             configv1.ConditionFalse,
-					Message:            fmt.Sprintf("Done deploying %s.", olmversion.OLMVersion),
-					LastTransitionTime: metav1.Now(),
-				})
-				clusteroperatorv1helpers.SetStatusCondition(&existing.Status.Conditions, configv1.ClusterOperatorStatusCondition{
-					Type:               configv1.OperatorAvailable,
-					Status:             configv1.ConditionTrue,
-					Message:            fmt.Sprintf("Done deploying %s.", olmversion.OLMVersion),
-					LastTransitionTime: metav1.Now(),
-				})
-
-				olmOperandVersion := configv1.OperandVersion{Name: "operator", Version: olmversion.Full()}
-				// look for operator version, even though in OLM's case should only be one
-				for _, item := range existing.Status.Versions {
-					if item.Name == "operator" && item != olmOperandVersion {
-						// if a cluster wide upgrade has occurred, hopefully any existing operator statuses have been deleted
-						log.Infof("Updating version from %v to %v\n", item.Version, olmversion.Full())
-					}
-				}
-				operatorv1helpers.SetOperandVersion(&existing.Status.Versions, olmOperandVersion)
-				_, err = configClient.ClusterOperators().UpdateStatus(existing)
-				if err != nil {
-					log.Fatalf("ClusterOperator update status failed: %v", err)
-				}
+				existing.Status.Versions = nil
+			}
+		default:
+			setOperatorStatusCondition(&existing.Status.Conditions, configv1.ClusterOperatorStatusCondition{
+				Type:    configv1.OperatorFailing,
+				Status:  configv1.ConditionTrue,
+				Message: "Waiting for updates to take effect",
+			})
+			setOperatorStatusCondition(&existing.Status.Conditions, configv1.ClusterOperatorStatusCondition{
+				Type:    configv1.OperatorProgressing,
+				Status:  configv1.ConditionFalse,
+				Message: fmt.Sprintf("Waiting to see update %s succeed", olmversion.OLMVersion),
+			})
+			// TODO: use % errors within a window to report available
+		}
+
+		// update the status
+		if !reflect.DeepEqual(previousStatus, &existing.Status) {
+			if _, err := configClient.ClusterOperators().UpdateStatus(existing); err != nil {
+				log.Errorf("Unable to update cluster operator status: %v", err)
 			}
 		}
+
+		// if we've reported success, we can sleep longer, otherwise we want to keep watching for
+		// successful
+		if successfulSyncs > 0 {
+			time.Sleep(5 * time.Minute)
+		}
+
+	}, 5*time.Second, stopCh)
+}
+
+func setOperatorStatusCondition(conditions *[]configv1.ClusterOperatorStatusCondition, newCondition configv1.ClusterOperatorStatusCondition) {
+	if conditions == nil {
+		conditions = &[]configv1.ClusterOperatorStatusCondition{}
+	}
+	existingCondition := findOperatorStatusCondition(*conditions, newCondition.Type)
+	if existingCondition == nil {
+		newCondition.LastTransitionTime = metav1.NewTime(time.Now())
+		*conditions = append(*conditions, newCondition)
+		return
 	}
 
-	<-done
+	if existingCondition.Status != newCondition.Status {
+		existingCondition.Status = newCondition.Status
+		existingCondition.LastTransitionTime = newCondition.LastTransitionTime
+	}
+
+	existingCondition.Reason = newCondition.Reason
+	existingCondition.Message = newCondition.Message
+}
+
+func findOperatorStatusCondition(conditions []configv1.ClusterOperatorStatusCondition, conditionType configv1.ClusterStatusConditionType) *configv1.ClusterOperatorStatusCondition {
+	for i := range conditions {
+		if conditions[i].Type == conditionType {
+			return &conditions[i]
+		}
+	}
+
+	return nil
 }
diff --git a/cmd/package-server/apiserver.local.config/certificates/apiserver.crt b/cmd/package-server/apiserver.local.config/certificates/apiserver.crt
@@ -0,0 +1,37 @@
+-----BEGIN CERTIFICATE-----
+MIIDGDCCAgCgAwIBAgIBAjANBgkqhkiG9w0BAQsFADAiMSAwHgYDVQQDDBdsb2Nh
+bGhvc3QtY2FAMTU1MjQyMzAyMDAeFw0xOTAzMTIyMDM3MDFaFw0yMDAzMTEyMDM3
+MDFaMB8xHTAbBgNVBAMMFGxvY2FsaG9zdEAxNTUyNDIzMDIxMIIBIjANBgkqhkiG
+9w0BAQEFAAOCAQ8AMIIBCgKCAQEAubkXRqN2xYxJiVhMjHnOtPCkU44QcLosVpIj
+tbUgzjJt0BDv/XNCMhbpD3dfKjMKZiKXt1dKDK2Tl52AceWqipVQlCf7kiX+CjuO
+gTAIEbVC7FWdu/sDI8BWbhs5knT+8Y7a5uGVexclZifvcbASuVtedLH47XI25Ak4
+s103Usy5Z2WXOLd79w/tsAr1kvQzveIdbn+upMu4to2wmfXhiLaU2qMhGoz+2hzm
+z+SXkB7uCgFbGuLIUj99/faSZ3CAH6EwPIerAKtY+1hdVmsjqpIrSs4jD7YyfmVN
+3+/MLTSMyHrghHYKt/SiRdCuVrbMhCylU8NFry+iuBIsOA202QIDAQABo1wwWjAO
+BgNVHQ8BAf8EBAMCBaAwEwYDVR0lBAwwCgYIKwYBBQUHAwEwDAYDVR0TAQH/BAIw
+ADAlBgNVHREEHjAcgglsb2NhbGhvc3SCCWxvY2FsaG9zdIcEfwAAATANBgkqhkiG
+9w0BAQsFAAOCAQEAacr9G8nNsHQpLCW+0meGmDz9deTfLYldFCbCjsPiUDWs9tUn
+O+04ykac2tEqZt2Ovkp6gntRPBCOKpgwHYvo0CJtCaL4yh6wYMvlbjHmHR/y+Ioy
+HymMmaQ06iVIhb2KoKFJvFtFUVNg6QE9w7dm9/C73eHcv3JhqYhGw3qBfUI6lmIc
+lWGj6WGVNfslofTYMkshbRGNZ3gFGkvcQvPOhKb/K4A3X9ZTGy9XyydVAOpdk/5n
+FBD4gOJJVSq2jJ5SOTJd5Z/YrY2tbCfZeuuPuxBK4XG3hnLN2fk9URwfCDc9EUQg
+aYagxskTB6jaDkFD5lfXxEc3W+/mP62i7mH/fQ==
+-----END CERTIFICATE-----
+-----BEGIN CERTIFICATE-----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+-----END CERTIFICATE-----
diff --git a/cmd/package-server/apiserver.local.config/certificates/apiserver.key b/cmd/package-server/apiserver.local.config/certificates/apiserver.key
@@ -0,0 +1,27 @@
+-----BEGIN RSA PRIVATE KEY-----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+-----END RSA PRIVATE KEY-----
diff --git a/manifests/0000_50_olm_06-olm-operator.deployment.yaml b/manifests/0000_50_olm_06-olm-operator.deployment.yaml
@@ -38,6 +38,8 @@ spec:
               path: /healthz
               port: 8080
           env:
+          - name: RELEASE_VERSION
+            value: "0.0.1-snapshot"
           - name: OPERATOR_NAMESPACE
             valueFrom:
               fieldRef:
diff --git a/manifests/0000_50_olm_14-operatorstatus.yaml b/manifests/0000_50_olm_14-operatorstatus.yaml
@@ -3,3 +3,7 @@ apiVersion: config.openshift.io/v1
 kind: ClusterOperator
 metadata:
   name: operator-lifecycle-manager
+status:
+  versions:
+  - name: operator
+    version: "0.0.1-snapshot"
diff --git a/pkg/lib/queueinformer/queueinformer_operator.go b/pkg/lib/queueinformer/queueinformer_operator.go
diff --git a/pkg/package-server/server/server.go b/pkg/package-server/server/server.go
diff --git a/test/e2e/operator_groups_e2e_test.go b/test/e2e/operator_groups_e2e_test.go

Original file line number	Diff line number	Diff line change
`@@ -96,6 +96,6 @@ func main() {`
`96`	`96`	`http.Handle("/metrics", promhttp.Handler())`
`97`	`97`	`go http.ListenAndServe(":8081", nil)`
`98`	`98`
`99`		`- _, done := catalogOperator.Run(stopCh)`
	`99`	`+ _, done, _ := catalogOperator.Run(stopCh)`
`100`	`100`	`<-done`
`101`	`101`	`}`