Don't Get Logs When Container Doesn't Exist Yet (#33)

This fix is not urgent because by default all logs are disabled currently.

It appears one of two things is happening:

1. GetTaskStatus is being called prior to BuildResources
2. Containers cannot be immediately referenced following BuildResources

This is causing a panic due to an expected container not being found.
TESTS WERE BYPASSED
REVIEWS WERE BYPASSED

go/tasks/v1/k8splugins/logging_utils.go

@@ -11,34 +11,36 @@ var GetLogConfig = plugins.GetLogConfig
 
 func GetLogsForContainerInPod(pod *v1.Pod, index uint32, nameSuffix string) ([]*core.TaskLog, error) {
 	var logs []*core.TaskLog
-	logConfig := GetLogConfig()
-
-	if logConfig.IsKubernetesEnabled {
-		k8sLog, err := logUtils.NewKubernetesLogPlugin(logConfig.KubernetesURL).GetTaskLog(
-			pod.Name,
-			pod.Namespace,
-			pod.Spec.Containers[index].Name,
-			pod.Status.ContainerStatuses[index].ContainerID,
-			"Kubernetes Logs"+nameSuffix)
-
-		if err != nil {
-			return nil, err
-		}
-		logs = append(logs, &k8sLog)
-	}
 
-	if logConfig.IsCloudwatchEnabled {
-		cwLogs, err := logUtils.NewCloudwatchLogPlugin(logConfig.AWSRegion).GetTaskLog(
-			pod.Name,
-			pod.Namespace,
-			pod.Spec.Containers[index].Name,
-			pod.Status.ContainerStatuses[index].ContainerID,
-			"Cloudwatch Logs"+nameSuffix)
+	if uint32(len(pod.Spec.Containers)) > index && uint32(len(pod.Status.ContainerStatuses)) > index {
+		logConfig := GetLogConfig()
+		if logConfig.IsKubernetesEnabled {
+			k8sLog, err := logUtils.NewKubernetesLogPlugin(logConfig.KubernetesURL).GetTaskLog(
+				pod.Name,
+				pod.Namespace,
+				pod.Spec.Containers[index].Name,
+				pod.Status.ContainerStatuses[index].ContainerID,
+				"Kubernetes Logs"+nameSuffix)
+
+			if err != nil {
+				return nil, err
+			}
+			logs = append(logs, &k8sLog)
+		}
 
-		if err != nil {
-			return nil, err
+		if logConfig.IsCloudwatchEnabled {
+			cwLogs, err := logUtils.NewCloudwatchLogPlugin(logConfig.AWSRegion).GetTaskLog(
+				pod.Name,
+				pod.Namespace,
+				pod.Spec.Containers[index].Name,
+				pod.Status.ContainerStatuses[index].ContainerID,
+				"Cloudwatch Logs"+nameSuffix)
+
+			if err != nil {
+				return nil, err
+			}
+			logs = append(logs, &cwLogs)
 		}
-		logs = append(logs, &cwLogs)
 	}
 
 	return logs, nil