January 2017
Intermediate to advanced
284 pages
6h 8m
English
Content preview from Docker OrchestrationBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Keeping your data safe in volumes
Adding data directly to the container image works very well for applications that you do not want to change while the applications are running. Your application code usually falls into this category. For tasks that will be updating data regularly, it is better to put the data on a volume. Volumes also provide a measure of data persistence since they stick around even after a container is removed.
Volumes are one of the keys to orchestration. Putting container data in an external volume helps to facilitate container updates and running containers across multiple hosts. Using networked, shared storage is covered in Chapter 3 , Cluster Building Blocks - Registry, Overlay Networks, and Shared Storage.
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