fix imagePullBackOff doc

Fixing the documentation with the correct syntax.

Signed-off-by: Priti Desai <pdesai@us.ibm.com>

docs/additional-configs.md

@@ -678,9 +678,10 @@ with the tekton controller and the affinity assistant is enabled.
 Tekton pipelines has adopted a fail fast strategy with a taskRun failing with `TaskRunImagePullFailed` in case of an
 `imagePullBackOff`. This can be limited in some cases, and it generally depends on the infrastructure. To allow the
 cluster operators to decide whether to wait in case of an `imagePullBackOff`, a setting is available to configure
-the wait time in minutes such that the controller will wait for the specified duration before declaring a failure.
+the wait time such that the controller will wait for the specified duration before declaring a failure.
 For example, with the following `config-defaults`, the controller does not mark the taskRun as failure for 5 minutes since
-the pod is scheduled in case the image pull fails with `imagePullBackOff`.
+the pod is scheduled in case the image pull fails with `imagePullBackOff`. The `default-imagepullbackoff-timeout` is
+of type `time.Duration` and can be set to a duration such as "1m", "5m", "10s", "1h", etc.
 See issue https://github.com/tektoncd/pipeline/issues/5987 for more details.
 
 ```yaml
@@ -690,7 +691,7 @@ metadata:
   name: config-defaults
   namespace: tekton-pipelines
 data:
-  default-imagepullbackoff-timeout: "5"
+  default-imagepullbackoff-timeout: "5m"
 ```
 
 ## Next steps

pkg/reconciler/taskrun/taskrun.go

@@ -234,7 +234,7 @@ func (c *Reconciler) checkPodFailed(ctx context.Context, tr *v1.TaskRun) (bool,
 					if imagePullBackOffTimeOut.Seconds() != 0 {
 						p, err := c.KubeClientSet.CoreV1().Pods(tr.Namespace).Get(ctx, tr.Status.PodName, metav1.GetOptions{})
 						if err != nil {
-							message := fmt.Sprintf(`The step %q in TaskRun %q failed to pull the image %q and the pod with error: "%s."`, step.Name, tr.Name, step.ImageID, err)
+							message := fmt.Sprintf(`the step %q in TaskRun %q failed to pull the image %q and the pod with error: "%s."`, step.Name, tr.Name, step.ImageID, err)
 							return true, v1.TaskRunReasonImagePullFailed, message
 						}
 						for _, condition := range p.Status.Conditions {
@@ -249,7 +249,7 @@ func (c *Reconciler) checkPodFailed(ctx context.Context, tr *v1.TaskRun) (bool,
 					}
 				}
 				image := step.ImageID
-				message := fmt.Sprintf(`The step %q in TaskRun %q failed to pull the image %q. The pod errored with the message: "%s."`, step.Name, tr.Name, image, step.Waiting.Message)
+				message := fmt.Sprintf(`the step %q in TaskRun %q failed to pull the image %q. The pod errored with the message: "%s."`, step.Name, tr.Name, image, step.Waiting.Message)
 				return true, v1.TaskRunReasonImagePullFailed, message
 			}
 		}
@@ -263,7 +263,7 @@ func (c *Reconciler) checkPodFailed(ctx context.Context, tr *v1.TaskRun) (bool,
 					if imagePullBackOffTimeOut.Seconds() != 0 {
 						p, err := c.KubeClientSet.CoreV1().Pods(tr.Namespace).Get(ctx, tr.Status.PodName, metav1.GetOptions{})
 						if err != nil {
-							message := fmt.Sprintf(`The sidecar %q in TaskRun %q failed to pull the image %q and the pod with error: "%s."`, sidecar.Name, tr.Name, sidecar.ImageID, err)
+							message := fmt.Sprintf(`the sidecar %q in TaskRun %q failed to pull the image %q and the pod with error: "%s."`, sidecar.Name, tr.Name, sidecar.ImageID, err)
 							return true, v1.TaskRunReasonImagePullFailed, message
 						}
 						for _, condition := range p.Status.Conditions {
@@ -278,7 +278,7 @@ func (c *Reconciler) checkPodFailed(ctx context.Context, tr *v1.TaskRun) (bool,
 					}
 				}
 				image := sidecar.ImageID
-				message := fmt.Sprintf(`The sidecar %q in TaskRun %q failed to pull the image %q. The pod errored with the message: "%s."`, sidecar.Name, tr.Name, image, sidecar.Waiting.Message)
+				message := fmt.Sprintf(`the sidecar %q in TaskRun %q failed to pull the image %q. The pod errored with the message: "%s."`, sidecar.Name, tr.Name, image, sidecar.Waiting.Message)
 				return true, v1.TaskRunReasonImagePullFailed, message
 			}
 		}