Difference between revisions of "Overlay file system linux"
From Teknologisk videncenter
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*[https://ops.tips/notes/practical-look-into-overlayfs/ Pratical look into overlay fs] | *[https://ops.tips/notes/practical-look-into-overlayfs/ Pratical look into overlay fs] | ||
*https://www.grant.pizza/blog/overlayfs/ | *https://www.grant.pizza/blog/overlayfs/ | ||
| − | [[Category:Linux]] | + | [[Category:Linux]][[Category:Docker]] |
Latest revision as of 08:28, 30 January 2025
Single lower directory example
#/usr/bin/env bash
mkdir lower # Common fs
mkdir upper1 work1 merged1 # Instance 1 fs
mkdir upper2 work2 merged2 # Instance 2 fs
# Populate
touch lower/lib1 lower/lib2 upper1/file1-1 upper1/file1-2 upper2/file2-1
mount -t overlay overlay -o lowerdir=./lower,upperdir=./upper1,workdir=./work1 ./merged1
mount -t overlay overlay -o lowerdir=./lower,upperdir=./upper2,workdir=./work2 ./merged2
Multiple lower directory example
#/usr/bin/env bash
mkdir lower # Common fs
mkdir lower1-1 lower1-2 lower1-3
mkdir upper1 work1 merged1 # Instance 1 fs
mkdir upper2 work2 merged2 # Instance 2 fs
# Populate
touch lower/lib1 lower/lib2 lower1-1/lib1-1 lower1-2/lib1-2 lower1-3/lib1-3 upper1/file1-1 upper1/file1-2 upper2/file2-1
mount -t overlay overlay -o lowerdir=./lower,upperdir=./upper1,workdir=./work1 ./merged1
mount -t overlay overlay -o lowerdir=./lower,upperdir=./upper2,workdir=./work2 ./merged2