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Topic

Linux overlay filesystems

Union-mount filesystems in the Linux kernel, chiefly overlayfs, that merge read-only lower layers with a writable upper layer; widely used for container images.

Current clusters

build1 publisher

systemd's mstack mounts a single-layer stack writable by default

systemd's mstack mounted a single-layer directory writable by default in a dev.to test, and one written line overwrote a read-only file with exit code 0. Anyone shipping a one-layer stack in a unit file has to prove read-only with a test write.

Publishers:dev.to

Reality

Evidence45
Adoption
Insufficient
Hype gap+30
Incentives
Insufficient
Confidence35