6 # Packages to install into the image we're creating. This is a deliberately
7 # minimalist set, providing only the packages necessary to bootstrap further
8 # package installation as specified via EC2 user-data.
9 export VM_EXTRA_PACKAGES="ec2-scripts firstboot-freebsd-update firstboot-pkgs"
11 # Set to a list of third-party software to enable in rc.conf(5).
12 export VM_RC_LIST="ec2_configinit ec2_fetchkey ec2_ephemeralswap ec2_loghostkey firstboot_freebsd_update firstboot_pkgs"
14 # Build with a 1.5 GB UFS partition; the growfs rc.d script will expand
15 # the partition to fill the root disk after the EC2 instance is launched.
16 # Note that if this is set to <N>G, we will end up with an <N+1> GB disk
17 # image since VMSIZE is the size of the UFS partition, not the disk which
21 # No swap space; the ec2_ephemeralswap rc.d script will allocate swap
22 # space on EC2 ephemeral disks. (If they exist -- the T2 low-cost instances
23 # and the C4 compute-optimized instances don't have ephemeral disks. But
24 # it would be silly to bloat the image and increase costs for every instance
25 # just for those two families, especially since instances ranging in size
26 # from 1 GB of RAM to 60 GB of RAM would need different sizes of swap space
30 vm_extra_pre_umount() {
31 # The firstboot_pkgs rc.d script will download the repository
32 # catalogue and install or update pkg when the instance first
33 # launches, so these files would just be replaced anyway; removing
34 # them from the image allows it to boot faster.
35 chroot ${DESTDIR} env ASSUME_ALWAYS_YES=yes \
36 /usr/sbin/pkg delete -f -y pkg
37 rm ${DESTDIR}/var/db/pkg/repo-*.sqlite
39 # The size of the EC2 root disk can be configured at instance launch
40 # time; expand our filesystem to fill the disk.
41 echo 'growfs_enable="YES"' >> ${DESTDIR}/etc/rc.conf
43 # EC2 instances use DHCP to get their network configuration.
44 echo 'ifconfig_DEFAULT="SYNCDHCP"' >> ${DESTDIR}/etc/rc.conf
46 # Unless the system has been configured via EC2 user-data, the user
47 # will need to SSH in to do anything.
48 echo 'sshd_enable="YES"' >> ${DESTDIR}/etc/rc.conf
50 # The AWS CLI tools are generally useful, and small enough that they
51 # will download quickly; but users will often override this setting
53 echo 'firstboot_pkgs_list="awscli"' >> ${DESTDIR}/etc/rc.conf
55 # The EC2 console is output-only, so while printing a backtrace can
56 # be useful, there's no point dropping into a debugger or waiting
58 echo 'debug.trace_on_panic=1' >> ${DESTDIR}/etc/sysctl.conf
59 echo 'debug.debugger_on_panic=0' >> ${DESTDIR}/etc/sysctl.conf
60 echo 'kern.panic_reboot_wait_time=0' >> ${DESTDIR}/etc/sysctl.conf
62 # The console is not interactive, so we might as well boot quickly.
63 echo 'autoboot_delay="-1"' >> ${DESTDIR}/boot/loader.conf
64 echo 'beastie_disable="YES"' >> ${DESTDIR}/boot/loader.conf
66 # EC2 has two consoles: An emulated serial port ("system log"),
67 # which has been present since 2006; and a VGA console ("instance
68 # screenshot") which was introduced in 2016.
69 echo 'boot_multicons="YES"' >> ${DESTDIR}/boot/loader.conf
71 # Some older EC2 hardware used a version of Xen with a bug in its
72 # emulated serial port. It is not clear if EC2 still has any such
73 # nodes, but apply the workaround just in case.
74 echo 'hw.broken_txfifo="1"' >> ${DESTDIR}/boot/loader.conf
76 # The first time the AMI boots, the installed "first boot" scripts
77 # should be allowed to run:
78 # * ec2_configinit (download and process EC2 user-data)
79 # * ec2_fetchkey (arrange for SSH using the EC2-provided public key)
80 # * growfs (expand the filesystem to fill the provided disk)
81 # * firstboot_freebsd_update (install critical updates)
82 # * firstboot_pkgs (install packages)
83 touch ${DESTDIR}/firstboot
85 rm -f ${DESTDIR}/etc/resolv.conf