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Merge pull request #2475 from rn/zfs
Add support for building ZFS kernel modules
This commit is contained in:
Rolf Neugebauer
GitHub
commit
c89af36c36
@ -307,3 +307,39 @@ nsenter -m/proc/1/ns/mnt ash
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Alternatively, you can add the `kernel-perf` package as stage in a
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multi-stage build to add it to a custom package.
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## ZFS
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The kernel build Makefile has support for building the ZFS kernel
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modules. Note, the modules are currently not distributed as standard
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LinuxKit packages and if you wish to use them you have to compile them
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yourself:
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```sh
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cd kernel
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make ORG=<foo> NOTRUST=1 push_zfs_4.9.x # or different kernel version
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```
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will build and push a `zfs-kmod-4.9.<version>` image to Docker Hub
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under the `ORG` specified. This package contains the all the standard
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kernel modules from the kernel specified plus the `spl` and `zfs`
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kernel modules, with `depmod` run over them, so they can be
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`modprobe`ed. To use the modules do something like this in your YAML
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file:
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```
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kernel:
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image: linuxkit/kernel:4.9.47
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cmdline: "console=tty0 console=ttyS0 console=ttyAMA0"
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init:
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- <foo>/zfs-kmod:4.9.47
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...
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```
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Then, you also need to make sure the Alpine `zfs` utilities are
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available in the container where your want to run `zfs` commands. The
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Alpine `zfs` utilities are available in `linuxkit/alpine` and the
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version of the kernel module should match the version of the
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tools. The container where you run the `zfs` tools might also need
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`CAP_SYS_MODULE` to be able to load the kernel modules.
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59
kernel/Dockerfile.zfs
Normal file
59
kernel/Dockerfile.zfs
Normal file
@ -0,0 +1,59 @@
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ARG IMAGE
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FROM ${IMAGE} AS ksrc
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FROM linuxkit/alpine:349a817bdd6b293ca623ab97acf5377ccdeac7d2 AS build
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RUN apk add \
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attr-dev \
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autoconf \
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automake \
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build-base \
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file \
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git \
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libtirpc-dev \
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libtool \
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util-linux-dev \
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zlib-dev
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COPY --from=ksrc /kernel-dev.tar /
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RUN tar xf kernel-dev.tar
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# Also extract the kernel modules
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COPY --from=ksrc /kernel.tar /
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RUN tar xf kernel.tar
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# Note: ZFS and SPL commits must match. It's unclear how much the user
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# space tools must match the kernel module version. The current zfs
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# package on Alpine is 0.6.5.9. We pick 0.6.5.10 because it has
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# support for 4.12 based kernels.
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ENV VERSION=0.6.5.10
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ENV SPL_REPO=https://github.com/zfsonlinux/spl.git
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ENV SPL_COMMIT=spl-${VERSION}
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RUN git clone ${SPL_REPO} && \
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cd spl && \
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git checkout ${SPL_COMMIT}
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ENV ZFS_REPO=https://github.com/zfsonlinux/zfs.git
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ENV ZFS_COMMIT=zfs-${VERSION}
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RUN git clone ${ZFS_REPO} && \
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cd zfs && \
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git checkout ${ZFS_COMMIT}
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WORKDIR /spl
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RUN ./autogen.sh && \
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./configure && \
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cd module && \
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make && \
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make install
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WORKDIR /zfs
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RUN ./autogen.sh && \
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./configure --with-spl=/spl && \
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cd module && \
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make -j "$(getconf _NPROCESSORS_ONLN)" && \
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make install
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FROM scratch
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ENTRYPOINT []
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CMD []
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WORKDIR /
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COPY --from=build /lib/modules/ /lib/modules/
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@ -16,6 +16,7 @@
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ORG?=linuxkit
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IMAGE:=kernel
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IMAGE_PERF:=kernel-perf
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IMAGE_ZFS:=zfs-kmod
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# You can specify an extra options for the Makefile. This will:
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# - append a kernel_config$(EXTRA) to the kernel config for your kernel/arch
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@ -118,11 +119,13 @@ push: push_$(2)$(3)
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show-tags: show-tag_$(2)$(3)
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fetch: sources/linux-$(1).tar.xz
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ifneq ($(2), 4.4.x)
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# 'docker build' with the FROM image supplied as --build-arg
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# *and* with DOCKER_CONTENT_TRUST=1 currently does not work
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# (https://github.com/moby/moby/issues/34199). So, we pull the image
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# with DCT and then build with DOCKER_CONTENT_TRUST explicitly set to 0.
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ifneq ($(2), 4.4.x)
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# perf does not build out of the box for 4.4.x and 4.4.x is not that relevant anymore to work on a fix
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build_perf_$(2)$(3): build_$(2)$(3)
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docker pull $(ORG)/$(IMAGE_PERF):$(1)$(3)-$(TAG)$(SUFFIX) || \
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(docker pull $(ORG)/$(IMAGE):$(1)$(3)-$(TAG)$(SUFFIX) && \
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@ -143,6 +146,26 @@ build: build_perf_$(2)$(3)
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push: push_perf_$(2)$(3)
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endif
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ifneq ($(3), -dbg)
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# ZFS does not compile against -dbg kernels because CONFIG_DEBUG_LOCK_ALLOC
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# is incompatible with CDDL, apparently (this is ./configure check)
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build_zfs_$(2)$(3): build_$(2)$(3)
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docker pull $(ORG)/$(IMAGE_ZFS):$(1)$(3)-$(TAG)$(SUFFIX) || \
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(docker pull $(ORG)/$(IMAGE):$(1)$(3)-$(TAG)$(SUFFIX) && \
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DOCKER_CONTENT_TRUST=0 docker build -f Dockerfile.zfs \
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--build-arg IMAGE=$(ORG)/$(IMAGE):$(1)$(3)-$(TAG)$(SUFFIX) \
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--no-cache $(LABEL) -t $(ORG)/$(IMAGE_ZFS):$(1)$(3)-$(TAG)$(SUFFIX) .)
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push_zfs_$(2)$(3): build_zfs_$(2)$(3)
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@if [ x"$(DIRTY)" != x ]; then echo "Your repository is not clean. Will not push image"; exit 1; fi
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docker pull $(ORG)/$(IMAGE_ZFS):$(1)$(3)-$(TAG)$(SUFFIX) || \
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(docker push $(ORG)/$(IMAGE_ZFS):$(1)$(3)-$(TAG)$(SUFFIX) && \
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docker tag $(ORG)/$(IMAGE_ZFS):$(1)$(3)-$(TAG)$(SUFFIX) $(ORG)/$(IMAGE_ZFS):$(1)$(3)$(SUFFIX) && \
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docker push $(ORG)/$(IMAGE_ZFS):$(1)$(3)$(SUFFIX) && \
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$(PUSH_MANIFEST) $(ORG)/$(IMAGE_ZFS):$(1)$(3)-$(TAG) $(DOCKER_CONTENT_TRUST) && \
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$(PUSH_MANIFEST) $(ORG)/$(IMAGE_ZFS):$(1)$(3) $(DOCKER_CONTENT_TRUST))
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endif
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endef
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#
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