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43 lines
1.6 KiB
Plaintext
43 lines
1.6 KiB
Plaintext
// Module included in the following assemblies:
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//
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// * storage/optimizing-storage.adoc
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:_mod-docs-content-type: REFERENCE
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[id="data-storage-management_{context}"]
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= Data storage management
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The following table summarizes the main directories that {product-title} components write data to.
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.Main directories for storing {product-title} data
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[options="header,footer"]
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|===
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|Directory|Notes|Sizing|Expected growth
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|*_/var/lib/etcd_*
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|Used for etcd storage when storing the database.
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|Less than 20 GB.
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Database can grow up to 8 GB.
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|Will grow slowly with the environment. Only storing metadata.
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Additional 20-25 GB for every additional 8 GB of memory.
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|*_/var/lib/containers_*
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|This is the mount point for the CRI-O runtime. Storage used for active container runtimes, including pods, and storage of local images. Not used for registry storage.
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|50 GB for a node with 16 GB memory. Note that this sizing should not be used to determine minimum cluster requirements.
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Additional 20-25 GB for every additional 8 GB of memory.
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|Growth is limited by capacity for running containers.
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|*_/var/lib/kubelet_*
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|Ephemeral volume storage for pods. This includes anything external that is mounted into a container at runtime. Includes environment variables, kube secrets, and data volumes not backed by persistent volumes.
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|Varies
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|Minimal if pods requiring storage are using persistent volumes. If using ephemeral storage, this can grow quickly.
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|*_/var/log_*
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|Log files for all components.
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|10 to 30 GB.
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|Log files can grow quickly; size can be managed by growing disks or by using log rotate.
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|===
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