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Firecracker: Make root disk configurable

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Add a FCROOTFSSZ variable which defaults to "1g" which controls the
size of the Firecracker root filesystem; it can be set as low as "300m"
at present.

Allow WITHOUTS to be overridden if users want to build a root disk with
more -- or fewer -- parts of the FreeBSD base system.

Reviewed by:	gjb
Sponsored by:	https://www.patreon.com/cperciva
Differential Revision:	https://reviews.freebsd.org/D41041
This commit is contained in:
Colin Percival 2023-07-14 15:11:22 -07:00
parent 454c425dbe
commit ac4f03e03e
1 changed files with 3 additions and 2 deletions
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5
release/Makefile.firecracker
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@ -17,7 +17,7 @@ WITHOUT_FC_ENOENT=WITHOUT_ACPI=YES WITHOUT_BOOT=YES WITHOUT_BHYVE=YES \
WITHOUT_FC_FEATURES=WITHOUT_DEBUG_FILES=YES WITHOUT_INCLUDES=YES \
WITHOUT_INSTALLLIB=YES WITHOUT_TESTS=YES WITHOUT_TOOLCHAIN=YES
# All the excluded bits
WITHOUTS=${WITHOUT_VM_ENOENT} ${WITHOUT_FC_ENOENT} ${WITHOUT_FC_FEATURES}
WITHOUTS?=${WITHOUT_VM_ENOENT} ${WITHOUT_FC_ENOENT} ${WITHOUT_FC_FEATURES}
firecracker: firecracker-freebsd-kern.bin firecracker-freebsd-rootfs.bin
@ -35,6 +35,7 @@ firecracker-freebsd-kern.bin:
cp ${FCKDIR}/boot/kernel/kernel ${DESTDIR}/freebsd-kern.bin
FCWDIR= ${.OBJDIR}/${TARGET}/firecracker-world
FCROOTFSSZ?= 1g
firecracker-freebsd-rootfs.bin:
mkdir -p ${FCWDIR}
${MAKE} -C ${WORLDDIR} DESTDIR=${FCWDIR} \
@ -54,5 +55,5 @@ firecracker-freebsd-rootfs.bin:
-u 1001 -g 1001 -G 0 -c "FreeBSD User" -d /home/freebsd -s /bin/sh
pw -R ${FCWDIR} usermod root -w yes
touch ${FCWDIR}/firstboot
makefs -s 1g -o label=rootfs -o version=2 -o softupdates=1 \
makefs -s ${FCROOTFSSZ} -o label=rootfs -o version=2 -o softupdates=1 \
${DESTDIR}/freebsd-rootfs.bin ${FCWDIR}