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reconcile.go
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/
reconcile.go
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// Copyright 2018 The Operator-SDK 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 controller
import (
"context"
"encoding/json"
"errors"
"math/rand"
"os"
"strconv"
"strings"
"time"
ansiblestatus "github.com/operator-framework/operator-sdk/pkg/ansible/controller/status"
"github.com/operator-framework/operator-sdk/pkg/ansible/events"
"github.com/operator-framework/operator-sdk/pkg/ansible/proxy/kubeconfig"
"github.com/operator-framework/operator-sdk/pkg/ansible/runner"
"github.com/operator-framework/operator-sdk/pkg/ansible/runner/eventapi"
"k8s.io/api/core/v1"
apierrors "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/runtime/schema"
"sigs.k8s.io/controller-runtime/pkg/client"
"sigs.k8s.io/controller-runtime/pkg/reconcile"
logf "sigs.k8s.io/controller-runtime/pkg/runtime/log"
)
const (
// ReconcilePeriodAnnotation - annotation used by a user to specify the reconcilation interval for the CR.
// To use create a CR with an annotation "ansible.operator-sdk/reconcile-period: 30s" or some other valid
// Duration. This will override the operators/or controllers reconcile period for that particular CR.
ReconcilePeriodAnnotation = "ansible.operator-sdk/reconcile-period"
)
// AnsibleOperatorReconciler - object to reconcile runner requests
type AnsibleOperatorReconciler struct {
GVK schema.GroupVersionKind
Runner runner.Runner
Client client.Client
EventHandlers []events.EventHandler
ReconcilePeriod time.Duration
ManageStatus bool
}
// Reconcile - handle the event.
func (r *AnsibleOperatorReconciler) Reconcile(request reconcile.Request) (reconcile.Result, error) {
u := &unstructured.Unstructured{}
u.SetGroupVersionKind(r.GVK)
err := r.Client.Get(context.TODO(), request.NamespacedName, u)
if apierrors.IsNotFound(err) {
return reconcile.Result{}, nil
}
if err != nil {
return reconcile.Result{}, err
}
ident := strconv.Itoa(rand.Int())
logger := logf.Log.WithName("reconciler").WithValues(
"job", ident,
"name", u.GetName(),
"namespace", u.GetNamespace(),
)
reconcileResult := reconcile.Result{RequeueAfter: r.ReconcilePeriod}
if ds, ok := u.GetAnnotations()[ReconcilePeriodAnnotation]; ok {
duration, err := time.ParseDuration(ds)
if err != nil {
return reconcileResult, err
}
reconcileResult.RequeueAfter = duration
}
deleted := u.GetDeletionTimestamp() != nil
finalizer, finalizerExists := r.Runner.GetFinalizer()
pendingFinalizers := u.GetFinalizers()
// If the resource is being deleted we don't want to add the finalizer again
if finalizerExists && !deleted && !contains(pendingFinalizers, finalizer) {
logger.V(1).Info("Adding finalizer to resource", "Finalizer", finalizer)
finalizers := append(pendingFinalizers, finalizer)
u.SetFinalizers(finalizers)
err := r.Client.Update(context.TODO(), u)
if err != nil {
return reconcileResult, err
}
}
if !contains(pendingFinalizers, finalizer) && deleted {
logger.Info("Resource is terminated, skipping reconcilation")
return reconcile.Result{}, nil
}
spec := u.Object["spec"]
_, ok := spec.(map[string]interface{})
if !ok {
logger.V(1).Info("spec was not found")
u.Object["spec"] = map[string]interface{}{}
err = r.Client.Update(context.TODO(), u)
if err != nil {
return reconcileResult, err
}
}
if r.ManageStatus {
err = r.markRunning(u)
if err != nil {
return reconcileResult, err
}
}
ownerRef := metav1.OwnerReference{
APIVersion: u.GetAPIVersion(),
Kind: u.GetKind(),
Name: u.GetName(),
UID: u.GetUID(),
}
kc, err := kubeconfig.Create(ownerRef, "http://localhost:8888", u.GetNamespace())
if err != nil {
return reconcileResult, err
}
defer os.Remove(kc.Name())
result, err := r.Runner.Run(ident, u, kc.Name())
if err != nil {
return reconcileResult, err
}
// iterate events from ansible, looking for the final one
statusEvent := eventapi.StatusJobEvent{}
failureMessages := eventapi.FailureMessages{}
for event := range result.Events() {
for _, eHandler := range r.EventHandlers {
go eHandler.Handle(ident, u, event)
}
if event.Event == eventapi.EventPlaybookOnStats {
// convert to StatusJobEvent; would love a better way to do this
data, err := json.Marshal(event)
if err != nil {
return reconcile.Result{}, err
}
err = json.Unmarshal(data, &statusEvent)
if err != nil {
return reconcile.Result{}, err
}
}
if event.Event == eventapi.EventRunnerOnFailed {
failureMessages = append(failureMessages, event.GetFailedPlaybookMessage())
}
}
if statusEvent.Event == "" {
eventErr := errors.New("did not receive playbook_on_stats event")
stdout, err := result.Stdout()
if err != nil {
logger.Error(err, "failed to get ansible-runner stdout")
return reconcileResult, err
}
logger.Error(eventErr, stdout)
return reconcileResult, eventErr
}
// We only want to update the CustomResource once, so we'll track changes and do it at the end
runSuccessful := len(failureMessages) == 0
// The finalizer has run successfully, time to remove it
if deleted && finalizerExists && runSuccessful {
finalizers := []string{}
for _, pendingFinalizer := range pendingFinalizers {
if pendingFinalizer != finalizer {
finalizers = append(finalizers, pendingFinalizer)
}
}
u.SetFinalizers(finalizers)
err := r.Client.Update(context.TODO(), u)
if err != nil {
return reconcileResult, err
}
}
if r.ManageStatus {
err = r.markDone(u, statusEvent, failureMessages)
}
return reconcileResult, err
}
func (r *AnsibleOperatorReconciler) markRunning(u *unstructured.Unstructured) error {
statusInterface := u.Object["status"]
statusMap, _ := statusInterface.(map[string]interface{})
crStatus := ansiblestatus.CreateFromMap(statusMap)
// If there is no current status add that we are working on this resource.
errCond := ansiblestatus.GetCondition(crStatus, ansiblestatus.FailureConditionType)
succCond := ansiblestatus.GetCondition(crStatus, ansiblestatus.RunningConditionType)
// If the condition is currently running, making sure that the values are correct.
// If they are the same a no-op, if they are different then it is a good thing we
// are updating it.
if (errCond == nil && succCond == nil) || (succCond != nil && succCond.Reason != ansiblestatus.SuccessfulReason) {
c := ansiblestatus.NewCondition(
ansiblestatus.RunningConditionType,
v1.ConditionTrue,
nil,
ansiblestatus.RunningReason,
ansiblestatus.RunningMessage,
)
ansiblestatus.SetCondition(&crStatus, *c)
u.Object["status"] = crStatus.GetJSONMap()
err := r.Client.Update(context.TODO(), u)
if err != nil {
return err
}
}
return nil
}
func (r *AnsibleOperatorReconciler) markDone(u *unstructured.Unstructured, statusEvent eventapi.StatusJobEvent, failureMessages eventapi.FailureMessages) error {
statusInterface := u.Object["status"]
statusMap, _ := statusInterface.(map[string]interface{})
crStatus := ansiblestatus.CreateFromMap(statusMap)
runSuccessful := len(failureMessages) == 0
ansibleStatus := ansiblestatus.NewAnsibleResultFromStatusJobEvent(statusEvent)
if !runSuccessful {
sc := ansiblestatus.GetCondition(crStatus, ansiblestatus.RunningConditionType)
sc.Status = v1.ConditionFalse
ansiblestatus.SetCondition(&crStatus, *sc)
c := ansiblestatus.NewCondition(
ansiblestatus.FailureConditionType,
v1.ConditionTrue,
ansibleStatus,
ansiblestatus.FailedReason,
strings.Join(failureMessages, "\n"),
)
ansiblestatus.SetCondition(&crStatus, *c)
} else {
c := ansiblestatus.NewCondition(
ansiblestatus.RunningConditionType,
v1.ConditionTrue,
ansibleStatus,
ansiblestatus.SuccessfulReason,
ansiblestatus.SuccessfulMessage,
)
// Remove the failure condition if set, because this completed successfully.
ansiblestatus.RemoveCondition(&crStatus, ansiblestatus.FailureConditionType)
ansiblestatus.SetCondition(&crStatus, *c)
}
// This needs the status subresource to be enabled by default.
u.Object["status"] = crStatus.GetJSONMap()
return r.Client.Update(context.TODO(), u)
}
func contains(l []string, s string) bool {
for _, elem := range l {
if elem == s {
return true
}
}
return false
}