1#!/bin/sh 2 3# Package which should be installed onto all EC2 AMIs: 4# * ebsnvme-id, which is very minimal and provides important EBS-specific 5# functionality, 6export VM_EXTRA_PACKAGES="${VM_EXTRA_PACKAGES} ebsnvme-id" 7 8# Services which should be enabled by default in rc.conf(5). 9export VM_RC_LIST="dev_aws_disk ntpd" 10 11# Build with a 7.9 GB partition; the growfs rc.d script will expand 12# the partition to fill the root disk after the EC2 instance is launched. 13# Note that if this is set to <N>G, we will end up with an <N+1> GB disk 14# image since VMSIZE is the size of the filesystem partition, not the disk 15# which it resides within. 16export VMSIZE=8000m 17 18# No swap space; it doesn't make sense to provision any as part of the disk 19# image when we could be launching onto a system with anywhere between 0.5 20# and 4096 GB of RAM. 21export NOSWAP=YES 22 23ec2_common() { 24 # Delete the pkg package and the repo database; they will likely be 25 # long out of date before the EC2 instance is launched. In 26 # unprivileged builds this is unnecessary as pkg will not be 27 # installed to begin with. 28 if [ -z "${NO_ROOT}" ]; then 29 echo "ERROR: NO_ROOT not set" >&2 30 exit 1 31 fi 32 33 # Turn off IPv6 Duplicate Address Detection; the EC2 networking 34 # configuration makes it unnecessary. 35 echo 'net.inet6.ip6.dad_count=0' >> ${DESTDIR}/etc/sysctl.conf 36 metalog_add_data ./etc/sysctl.conf 37 38 # Tell gptboot not to wait 3 seconds for a keypress which will 39 # never arrive. 40 printf -- "-n\n" > ${DESTDIR}/boot.config 41 metalog_add_data ./boot.config 42 43 # Booting quickly is more important than giving users a chance to 44 # access the boot loader via the serial port; but if users turn the 45 # boot loader back on, avoid unicode since it breaks the EC2 web 46 # console. 47 echo 'autoboot_delay="-1"' >> ${DESTDIR}/boot/loader.conf 48 echo 'beastie_disable="YES"' >> ${DESTDIR}/boot/loader.conf 49 echo 'loader_menu_frame="ascii"' >> ${DESTDIR}/boot/loader.conf 50 51 # The EFI RNG on Graviton 2 is particularly slow if we ask for the 52 # default 2048 bytes of entropy; ask for 64 bytes instead. 53 echo 'entropy_efi_seed_size="64"' >> ${DESTDIR}/boot/loader.conf 54 55 # The emulated keyboard attached to EC2 instances is inaccessible to 56 # users, and there is no mouse attached at all; disable to keyboard 57 # and the keyboard controller (to which the mouse would attach, if 58 # one existed) in order to save time in device probing. 59 echo 'hint.atkbd.0.disabled=1' >> ${DESTDIR}/boot/loader.conf 60 echo 'hint.atkbdc.0.disabled=1' >> ${DESTDIR}/boot/loader.conf 61 62 # There is no floppy drive on EC2 instances so disable the driver. 63 echo 'hint.fd.0.disabled=1' >> ${DESTDIR}/boot/loader.conf 64 echo 'hint.fdc.0.disabled=1' >> ${DESTDIR}/boot/loader.conf 65 66 # There is no parallel port on EC2 instances so disable driver. 67 echo 'hint.ppc.0.disabled=1' >> ${DESTDIR}/boot/loader.conf 68 69 # EC2 has two consoles: An emulated serial port ("system log"), 70 # which has been present since 2006; and a VGA console ("instance 71 # screenshot") which was introduced in 2016. 72 echo 'boot_multicons="YES"' >> ${DESTDIR}/boot/loader.conf 73 74 # Graviton 1 through Graviton 4 have a bug in their ACPI where they 75 # mark the PL061's pins as needing to be configured in PullUp mode 76 # (in fact the PL061 has no pullup/pulldown resistors). Graviton 1 77 # through Graviton 3 have non-functional PCI _EJ0 and need a value 78 # written to the PCI power status register in order to eject a 79 # device. EC2 instances with PCI (not PCIe) buses need a short 80 # delay before rescanning upon device detach. 81 echo 'debug.acpi.quirks="56"' >> ${DESTDIR}/boot/loader.conf 82 83 # The default behaviour of re-routing INTx interrupts causes a 84 # resource leak on INTRng (aka on Graviton systems). Repeated 85 # hotplug/unplug on PCI (not PCIe) Graviton systems ends up with 86 # a kernel panic unless we disable this. 87 echo 'hw.pci.intx_reroute=0' >> ${DESTDIR}/boot/loader.conf 88 89 # Load the kernel module for the Amazon "Elastic Network Adapter" 90 echo 'if_ena_load="YES"' >> ${DESTDIR}/boot/loader.conf 91 92 # Use the "nda" driver for accessing NVMe disks rather than the 93 # historical "nvd" driver. 94 echo 'hw.nvme.use_nvd="0"' >> ${DESTDIR}/boot/loader.conf 95 96 # Reduce the timeout for PCIe Eject ("hotunplug") requests. PCIe 97 # mandates a 5 second timeout to allow someone to cancel the eject 98 # by pressing the "Attention button" a second time, but in the EC2 99 # environment this delay serves no purpose. 100 echo 'hw.pci.pcie_hp_detach_timeout="0"' >> ${DESTDIR}/boot/loader.conf 101 metalog_add_data ./boot/loader.conf 102 103 # Disable KbdInteractiveAuthentication according to EC2 requirements. 104 sed -i '' -e \ 105 's/^#KbdInteractiveAuthentication yes/KbdInteractiveAuthentication no/' \ 106 ${DESTDIR}/etc/ssh/sshd_config 107 108 # RSA host keys are obsolete and also very slow to generate 109 echo 'sshd_rsa_enable="NO"' >> ${DESTDIR}/etc/rc.conf 110 111 # Use FreeBSD Update mirrors hosted in AWS 112 sed -i '' -e 's/update.FreeBSD.org/aws.update.FreeBSD.org/' \ 113 ${DESTDIR}/etc/freebsd-update.conf 114 115 # Use the NTP service provided by Amazon 116 sed -i '' -e 's/^pool/#pool/' \ 117 -e '1,/^#server/s/^#server.*/server 169.254.169.123 iburst/' \ 118 ${DESTDIR}/etc/ntp.conf 119 120 # Provide a map for accessing Elastic File System mounts 121 cat > ${DESTDIR}/etc/autofs/special_efs <<'EOF' 122#!/bin/sh 123 124if [ $# -eq 0 ]; then 125 # No way to know which EFS filesystems exist and are 126 # accessible to this EC2 instance. 127 exit 0 128fi 129 130# Provide instructions on how to mount the requested filesystem. 131FS=$1 132REGION=`fetch -qo- http://169.254.169.254/latest/meta-data/placement/availability-zone | sed -e 's/[a-z]$//'` 133echo "-nfsv4,minorversion=1,oneopenown ${FS}.efs.${REGION}.amazonaws.com:/" 134EOF 135 chmod 755 ${DESTDIR}/etc/autofs/special_efs 136 metalog_add_data ./etc/autofs/special_efs 0755 137 138 return 0 139} 140 141ec2_base_networking () { 142 # EC2 instances use DHCP to get their network configuration. IPv6 143 # requires accept_rtadv. 144 echo 'ifconfig_DEFAULT="SYNCDHCP accept_rtadv"' >> ${DESTDIR}/etc/rc.conf 145 146 # The EC2 DHCP server can be trusted to know whether an IP address is 147 # assigned to us; we don't need to ARP to check if anyone else is using 148 # the address before we start using it. 149 echo 'dhclient_arpwait="NO"' >> ${DESTDIR}/etc/rc.conf 150 151 # Enable IPv6 on all interfaces, and spawn DHCPv6 via rtsold 152 echo 'ipv6_activate_all_interfaces="YES"' >> ${DESTDIR}/etc/rc.conf 153 echo 'rtsold_enable="YES"' >> ${DESTDIR}/etc/rc.conf 154 echo 'rtsold_flags="-M /usr/local/libexec/rtsold-M -a"' >> ${DESTDIR}/etc/rc.conf 155 156 # Provide a script which rtsold can use to launch DHCPv6 157 mkdir -p ${DESTDIR}/usr/local/libexec 158 cat > ${DESTDIR}/usr/local/libexec/rtsold-M <<'EOF' 159#!/bin/sh 160 161/usr/local/sbin/dhclient -6 -nw -N -cf /dev/null $1 162EOF 163 chmod 755 ${DESTDIR}/usr/local/libexec/rtsold-M 164 metalog_add_data ./usr/local/libexec/rtsold-M 0755 165 166 return 0 167} 168