overlayfs multiple read only file system mount fail

Bug #1562994 reported by PerryT
6
This bug affects 1 person
Affects Status Importance Assigned to Milestone
casper (Ubuntu)
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Bug Description

BUG DESCRIPTION:

when casper try to mount multiple read-only file systems using overlay unionfs,
the second mount will fail because the upper directory must be writable.

SOLUTION:

use multiple lower directories to replace read-only upper directories

WORKAROUND:

use option: union=aufs

BUG LOCATION:

In Kubuntu 15.10 LiveCD
in file /casper/initrd.lz
in file /scripts/casper
in function setup_unionfs
somewhere after line '# Record the format we are using for this mount.'

Revision history for this message
Mathieu Trudel-Lapierre (cyphermox) wrote :

Seems to me like this is basically a duplicate of bug 1561606; where the requirement is to support multiple squashfs images layered on top of each other.

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