Allow option to override kernel check in overlay2
Add option to skip kernel check for older kernels which have been patched to support multiple lower directories in overlayfs. Fixes #24023 Signed-off-by: Derek McGowan <derek@mcgstyle.net> (github: dmcgowan)
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@ -566,6 +566,17 @@ options for `zfs` start with `zfs` and options for `btrfs` start with `btrfs`.
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Example use:
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Example use:
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$ docker daemon -s btrfs --storage-opt btrfs.min_space=10G
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$ docker daemon -s btrfs --storage-opt btrfs.min_space=10G
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#### Overlay2 options
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* `overlay2.override_kernel_check`
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Overrides the Linux kernel version check allowing overlay2. Support for
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specifying multiple lower directories needed by overlay2 was added to the
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Linux kernel in 4.0.0. However some older kernel versions may be patched
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to add multiple lower directory support for OverlayFS. This option should
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only be used after verifying this support exists in the kernel. Applying
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this option on a kernel without this support will cause failures on mount.
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## Docker runtime execution options
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## Docker runtime execution options
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The Docker daemon relies on a
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The Docker daemon relies on a
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