Podcast
Questions and Answers
What happens to the data in a tmpfs storage option when the container is stopped?
What happens to the data in a tmpfs storage option when the container is stopped?
- The data is written to the container's filesystem layer.
- The data is saved permanently on the host.
- The data is deleted. (correct)
- The data is transferred to persistent storage.
Which of the following best describes the primary purpose of Storage Plugins in Docker?
Which of the following best describes the primary purpose of Storage Plugins in Docker?
- To facilitate automatic backups of container data.
- To allow connections to external storage platforms. (correct)
- To manage network connectivity between containers.
- To increase container performance by adding RAM.
How is the container isolated from its host machine by default?
How is the container isolated from its host machine by default?
- By requiring user authentication to access the container.
- By restricting network access only to root.
- By using a shared filesystem layer.
- By default, containers have a well-defined level of isolation. (correct)
What is the function of the mount flag when creating a tmpfs volume?
What is the function of the mount flag when creating a tmpfs volume?
Which statement about tmpfs storage is true?
Which statement about tmpfs storage is true?
A container in Docker can persist state changes even after it is deleted.
A container in Docker can persist state changes even after it is deleted.
Tmpfs storage uses the host's memory and clears data when the container is stopped.
Tmpfs storage uses the host's memory and clears data when the container is stopped.
Containers can share tmpfs space regardless of the operating system they are running on.
Containers can share tmpfs space regardless of the operating system they are running on.
The mount flag for tmpfs is older and has limited options compared to the tmpfs flag.
The mount flag for tmpfs is older and has limited options compared to the tmpfs flag.
Storage Plugins in Docker can connect to external storage platforms.
Storage Plugins in Docker can connect to external storage platforms.
Flashcards
Docker Container
Docker Container
A runnable instance of a Docker image. Containers can be created, started, stopped, moved, or deleted using the Docker API or CLI.
Tmpfs
Tmpfs
A type of storage for containers that uses the host's memory and is deleted when the container stops. Useful for sensitive data.
Storage Plugins
Storage Plugins
A storage option that allows Docker to connect to external storage platforms, like storage arrays or appliances.
Bind Mount
Bind Mount
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Docker Volume
Docker Volume
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What is tmpfs?
What is tmpfs?
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What are Storage Plugins?
What are Storage Plugins?
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How does a Bind Mount work in Docker?
How does a Bind Mount work in Docker?
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What is a Docker Volume?
What is a Docker Volume?
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What is a Docker Container?
What is a Docker Container?
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Study Notes
Containers
- Containers are runnable instances of images.
- Created, started, stopped, moved, or deleted using Docker API or CLI.
- Can connect to networks, attach storage, or create new images.
- Isolated from other containers & host machine by default.
- Isolation level adjustable for network, storage, and other subsystems.
- Defined by image and configuration options.
- Removed changes not in persistent storage are lost.
- Can be connected to one or more networks.
Storage
Tmpfs
- Not permanent storage like Docker volume or bind mount.
- Data written directly to host memory; deleted on container stop.
- Useful for sensitive data.
- Containers cannot share tmpfs unless on Linux.
- Created using
tmpfsand optionalmountflags. - Mount flags support multiple options during container startup.
- Data in RAM or swap.
Storage Plugins
- Connect to external storage platforms.
- Map host storage to external sources (arrays, appliances).
- External storage plugins are viewable on Docker's Plugin page.
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