mirror of
https://github.com/freebsd/freebsd-src
synced 2024-09-06 17:18:32 +00:00
![Colin Percival](/assets/img/avatar_default.png)
The vm_extra_pre_umount function in vmimage.subr served two purposes: It removed /etc/resolv.conf and /qemu (if cross-building), and it provided a function for cloudware to override in order to make cloud specific changes to the filesystem before constructing a disk image. This resulted in a number of bugs: 1. When cross-building, the emulator binary was left as /qemu in the Azure, GCE, Openstack and Vagrant images. 2. The build host's resolv.conf was left as /etc/resolv.conf in the basic-ci and basic-cloudinit images. 3. When building GCE images, a Google-specific resolv.conf file was constructed, and then deleted before the disk image was created. Move the bits needed for running code inside a VM staging directory from vm_install_base into a new vm_emulation_setup routine, and move the corresponding cleanup bits from vm_extra_pre_umount to a new vm_emulation_cleanup routine. Remove the /qemu and /etc/resolv.conf cleanups from the cloudware configuration files (where they exist) since we will now be running vm_emulation_cleanup to remove those even when vm_extra_pre_umount has been overridden. Override vm_emulation_cleanup in gce.conf since in that one case (and *only* that one case) we don't want to clean up resolv.conf (since it was constructed for the VM image rather than copied from the host). releng/14.1 candidate. MFC after: 1 week Sponsored by: https://www.patreon.com/cperciva
107 lines
4.1 KiB
Bash
107 lines
4.1 KiB
Bash
#!/bin/sh
|
|
|
|
# Packages which should be installed onto all EC2 AMIs:
|
|
# * ebsnvme-id, which is very minimal and provides important EBS-specific
|
|
# functionality,
|
|
# * amazon-ssm-agent (not enabled by default, but some users need to use
|
|
# it on systems not connected to the internet).
|
|
export VM_EXTRA_PACKAGES="${VM_EXTRA_PACKAGES} ebsnvme-id amazon-ssm-agent"
|
|
|
|
# Services which should be enabled by default in rc.conf(5).
|
|
export VM_RC_LIST="dev_aws_disk ntpd"
|
|
|
|
# Build with a 5.9 GB partition; the growfs rc.d script will expand
|
|
# the partition to fill the root disk after the EC2 instance is launched.
|
|
# Note that if this is set to <N>G, we will end up with an <N+1> GB disk
|
|
# image since VMSIZE is the size of the filesystem partition, not the disk
|
|
# which it resides within.
|
|
export VMSIZE=6000m
|
|
|
|
# No swap space; it doesn't make sense to provision any as part of the disk
|
|
# image when we could be launching onto a system with anywhere between 0.5
|
|
# and 4096 GB of RAM.
|
|
export NOSWAP=YES
|
|
|
|
ec2_common() {
|
|
# Delete the pkg package and the repo database; they will likely be
|
|
# long out of date before the EC2 instance is launched.
|
|
mount -t devfs devfs ${DESTDIR}/dev
|
|
chroot ${DESTDIR} ${EMULATOR} env ASSUME_ALWAYS_YES=yes \
|
|
/usr/sbin/pkg delete -f -y pkg
|
|
umount ${DESTDIR}/dev
|
|
rm ${DESTDIR}/var/db/pkg/repo-*.sqlite
|
|
|
|
# Turn off IPv6 Duplicate Address Detection; the EC2 networking
|
|
# configuration makes it unnecessary.
|
|
echo 'net.inet6.ip6.dad_count=0' >> ${DESTDIR}/etc/sysctl.conf
|
|
|
|
# Booting quickly is more important than giving users a chance to
|
|
# access the boot loader via the serial port.
|
|
echo 'autoboot_delay="-1"' >> ${DESTDIR}/boot/loader.conf
|
|
echo 'beastie_disable="YES"' >> ${DESTDIR}/boot/loader.conf
|
|
|
|
# Tell gptboot not to wait 3 seconds for a keypress which will
|
|
# never arrive.
|
|
printf -- "-n\n" > ${DESTDIR}/boot.config
|
|
|
|
# The emulated keyboard attached to EC2 instances is inaccessible to
|
|
# users, and there is no mouse attached at all; disable to keyboard
|
|
# and the keyboard controller (to which the mouse would attach, if
|
|
# one existed) in order to save time in device probing.
|
|
echo 'hint.atkbd.0.disabled=1' >> ${DESTDIR}/boot/loader.conf
|
|
echo 'hint.atkbdc.0.disabled=1' >> ${DESTDIR}/boot/loader.conf
|
|
|
|
# EC2 has two consoles: An emulated serial port ("system log"),
|
|
# which has been present since 2006; and a VGA console ("instance
|
|
# screenshot") which was introduced in 2016.
|
|
echo 'boot_multicons="YES"' >> ${DESTDIR}/boot/loader.conf
|
|
|
|
# Some older EC2 hardware used a version of Xen with a bug in its
|
|
# emulated serial port. It is not clear if EC2 still has any such
|
|
# nodes, but apply the workaround just in case.
|
|
echo 'hw.broken_txfifo="1"' >> ${DESTDIR}/boot/loader.conf
|
|
|
|
# Load the kernel module for the Amazon "Elastic Network Adapter"
|
|
echo 'if_ena_load="YES"' >> ${DESTDIR}/boot/loader.conf
|
|
|
|
# Use the "nda" driver for accessing NVMe disks rather than the
|
|
# historical "nvd" driver.
|
|
echo 'hw.nvme.use_nvd="0"' >> ${DESTDIR}/boot/loader.conf
|
|
|
|
# Disable KbdInteractiveAuthentication according to EC2 requirements.
|
|
sed -i '' -e \
|
|
's/^#KbdInteractiveAuthentication yes/KbdInteractiveAuthentication no/' \
|
|
${DESTDIR}/etc/ssh/sshd_config
|
|
|
|
# Use FreeBSD Update mirrors hosted in AWS
|
|
sed -i '' -e 's/update.FreeBSD.org/aws.update.FreeBSD.org/' \
|
|
${DESTDIR}/etc/freebsd-update.conf
|
|
|
|
# Use the NTP service provided by Amazon
|
|
sed -i '' -e 's/^pool/#pool/' \
|
|
-e '1,/^#server/s/^#server.*/server 169.254.169.123 iburst/' \
|
|
${DESTDIR}/etc/ntp.conf
|
|
|
|
# Provide a map for accessing Elastic File System mounts
|
|
cat > ${DESTDIR}/etc/autofs/special_efs <<'EOF'
|
|
#!/bin/sh
|
|
|
|
if [ $# -eq 0 ]; then
|
|
# No way to know which EFS filesystems exist and are
|
|
# accessible to this EC2 instance.
|
|
exit 0
|
|
fi
|
|
|
|
# Provide instructions on how to mount the requested filesystem.
|
|
FS=$1
|
|
REGION=`fetch -qo- http://169.254.169.254/latest/meta-data/placement/availability-zone | sed -e 's/[a-z]$//'`
|
|
echo "-nfsv4,minorversion=1,oneopenown ${FS}.efs.${REGION}.amazonaws.com:/"
|
|
EOF
|
|
chmod 755 ${DESTDIR}/etc/autofs/special_efs
|
|
|
|
# The first time the AMI boots, run "first boot" scripts.
|
|
touch ${DESTDIR}/firstboot
|
|
|
|
return 0
|
|
}
|