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feat: enable btrfs #2001

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Merged
merged 1 commit into from
Mar 21, 2025
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feat: enable btrfs #2001

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4 changes: 3 additions & 1 deletion Dockerfile
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,7 @@ FROM gke.gcr.io/debian-base:bookworm-v1.0.4-gke.3 AS debian

# Install necessary dependencies
# google_nvme_id script depends on the following packages: nvme-cli, xxd, bash
RUN clean-install util-linux e2fsprogs mount ca-certificates udev xfsprogs nvme-cli xxd bash kmod lvm2 mdadm
RUN clean-install util-linux e2fsprogs mount ca-certificates udev xfsprogs nvme-cli xxd bash kmod lvm2 mdadm btrfs-progs

# Since we're leveraging apt to pull in dependencies, we use `gcr.io/distroless/base` because it includes glibc.
FROM gcr.io/distroless/base-debian12 AS distroless-base
Expand All @@ -48,6 +48,7 @@ COPY --from=debian /etc/mke2fs.conf /etc/mke2fs.conf
COPY --from=debian /lib/udev/scsi_id /lib/udev_containerized/scsi_id
COPY --from=debian /bin/mount /bin/mount
COPY --from=debian /bin/umount /bin/umount
COPY --from=debian /bin/btrfs /bin/btrfs
COPY --from=debian /sbin/blkid /sbin/blkid
COPY --from=debian /sbin/blockdev /sbin/blockdev
COPY --from=debian /sbin/dumpe2fs /sbin/dumpe2fs
Expand Down Expand Up @@ -131,6 +132,7 @@ COPY --from=debian /lib/${LIB_DIR_PREFIX}-linux-gnu/libselinux.so.1 \
/lib/${LIB_DIR_PREFIX}-linux-gnu/libnvme.so.1 \
/lib/${LIB_DIR_PREFIX}-linux-gnu/libsystemd.so.0 \
/lib/${LIB_DIR_PREFIX}-linux-gnu/libgpg-error.so.0 \
/lib/${LIB_DIR_PREFIX}-linux-gnu/liblzo2.so.2 \
/lib/${LIB_DIR_PREFIX}-linux-gnu/libzstd.so.1 /lib/${LIB_DIR_PREFIX}-linux-gnu/

COPY --from=debian /usr/lib/${LIB_DIR_PREFIX}-linux-gnu/libblkid.so.1 \
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6 changes: 6 additions & 0 deletions README.md
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Expand Up @@ -92,6 +92,12 @@ As part of the deployment process, the driver is deployed in a newly created nam

Controller-level and node-level deployments will both have priorityClassName set, and the corresponding priority value is close to the maximum possible for user-created PriorityClasses.

## Notes on filesystems

As noted in [GCP PD documentation](https://cloud.google.com/kubernetes-engine/docs/how-to/persistent-volumes/gce-pd-csi-driver), `ext4` and `xfs` are officially supported. `btrfs` support is experimental:
- As of writing, Ubuntu VM images support btrfs, but [COS does not](https://cloud.google.com/container-optimized-os/docs/concepts/supported-filesystems).
- Early testers have observed CSI driver OOMs when mounting larger (1TiB+) btrfs volumes under default memory constraints. The default constraint, as of writing, is 50MiB.

## Further Documentation

[Local Development](docs/kubernetes/development.md)
Expand Down