Mount point
A mount point is a filesystem path where a storage device, volume, or filesystem is attached and made accessible within a directory hierarchy.
Learn Docker in a Month of Lunches, Second Edition
A volume mount makes a Docker-managed storage object available to a container for reading and writing data.
- How it is used
- Makes persistent or host-provided storage available at a path inside a container.
- How deep it goes
- Explains target-directory shadowing and storage choices, but defers implementation details of the union filesystem.
- Examples
- Compares directory listings with and without a bind mount, then uses a volume-backed to-do app as a lab.
- What you can do after
- Practice/perform mounting storage for a containerized app while checking whether existing files are hidden and saved data persists.
Read how Learn Docker in a Month of Lunches, Second Edition explains mount point →
Kubernetes in Action, Second Edition
VolumeMounts is the Kubernetes container field containing the volume mount definitions for that container.
- How it is used
- Connects a Pod volume to a container filesystem so applications can store, share, or read files outside the container image.
- How deep it goes
- Defines required name and mountPath fields, common read-only behavior, and lifecycle interaction with init containers.
- Examples
- Uses MongoDB data at /data/db, initialized files at /docker-entrypoint-initdb.d/, and TLS files at /etc/certs.
- What you can do after
- Configure volume-backed container paths in Pod manifests and distinguish volume definitions from their container mounts.
Read how Kubernetes in Action, Second Edition explains mount point →
Related concepts
- tmpfsuses · tmpfs is a virtual filesystem that stores file contents in volatile memory and kernel-managed caches.
- persistent volume claimuses · A PersistentVolumeClaim is a Kubernetes resource through which a workload requests persistent storage with specified capacity, access modes, and other storage characteristics.
- volumeuses · A volume is a logical storage resource that provides capacity for storing and accessing data, often by making it available to an operating system or application.
- CAP_SYS_ADMINused by · CAP_SYS_ADMIN is a Linux capability that includes permission to perform filesystem mounts and many other system-administration operations.
- virtual filesystempart of · A virtual filesystem is a software abstraction that presents files and directories through filesystem-like organization and operations without requiring direct access to physical storage.
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