K8s storage: EmptyDir

extraVolumes:
 - name: extras
   emptyDir: {}

extraVolumeMounts:
 - name: extras
   mountPath: /usr/share/extras
   readOnly: true

kubectl get psp
Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+
NAME                    PRIV    CAPS   SELINUX    RUNASUSER   FSGROUP    SUPGROUP   READONLYROOTFS   VOLUMES
gce.gke-metrics-agent   false          RunAsAny   RunAsAny    RunAsAny   RunAsAny   false            hostPath,secret,configMap
grafana                 false          RunAsAny   RunAsAny    RunAsAny   RunAsAny   false            configMap,emptyDir,projected,secret,downwardAPI,persistentVolumeClaim

kubectl get psp
Warning: policy/v1beta1 PodSecurityPolicy is deprecated in v1.21+, unavailable in v1.25+
NAME                    PRIV    CAPS   SELINUX    RUNASUSER   FSGROUP    SUPGROUP   READONLYROOTFS   VOLUMES
gce.gke-metrics-agent   false          RunAsAny   RunAsAny    RunAsAny   RunAsAny   false            hostPath,secret,configMap

See also

• Kubernetes storage, storage classes, PersistentVolume (PV), PVC, CSI, kind: StorageClass, kind: PersistentVolumeClaim, kind: PersistentVolume, kubectl [ get | describe | edit ] pvc, volumeClaimTemplates:, kubectl patch pv, FailedMount, Volume Expansion, Volume Cloning, snapshots, ExtraVolumes, NotTriggerScaleUp, volumePVCDataSource, AllowVolumeExpansion, EKS storage, provisioner, Storage Capacity Tracking, VolumeBinding, VolumeClaimTemplate, storage.k8s.io, CKA Storage, DoKC, EmptyDir, Volume populators, storageclass.kubernetes.io