Author: cperciva
Date: Tue Sep 22 23:13:29 2020
New Revision: 366028
URL: https://svnweb.freebsd.org/changeset/base/366028

Log:
  MFC r365696: Spawn the DHCPv6 client in EC2 instances via rtsold.

Modified:
  stable/12/release/tools/ec2.conf
Directory Properties:
  stable/12/   (props changed)

Modified: stable/12/release/tools/ec2.conf
==============================================================================
--- stable/12/release/tools/ec2.conf    Tue Sep 22 23:02:01 2020        
(r366027)
+++ stable/12/release/tools/ec2.conf    Tue Sep 22 23:13:29 2020        
(r366028)
@@ -6,7 +6,7 @@
 # Packages to install into the image we're creating.  This is a deliberately
 # minimalist set, providing only the packages necessary to bootstrap further
 # package installation as specified via EC2 user-data.
-export VM_EXTRA_PACKAGES="ec2-scripts firstboot-freebsd-update firstboot-pkgs 
dual-dhclient-daemon ebsnvme-id"
+export VM_EXTRA_PACKAGES="ec2-scripts firstboot-freebsd-update firstboot-pkgs 
isc-dhcp44-client ebsnvme-id"
 
 # Include the amazon-ssm-agent package in amd64 images, since some users want
 # to be able to use it on systems which are not connected to the Internet.
@@ -63,9 +63,19 @@ vm_extra_pre_umount() {
        # via EC2 user-data.
        echo 'firstboot_pkgs_list="awscli"' >> ${DESTDIR}/etc/rc.conf
 
-       # Enable IPv6 on all interfaces, and use DHCP on both IPv4 and IPv6.
+       # Enable IPv6 on all interfaces, and spawn DHCPv6 via rtsold
        echo 'ipv6_activate_all_interfaces="YES"' >> ${DESTDIR}/etc/rc.conf
-       echo 'dhclient_program="/usr/local/sbin/dual-dhclient"' >> 
${DESTDIR}/etc/rc.conf
+       echo 'rtsold_enable="YES"' >> ${DESTDIR}/etc/rc.conf
+       echo 'rtsold_flags="-M /usr/local/libexec/rtsold-M -a"' >> 
${DESTDIR}/etc/rc.conf
+
+       # Provide a script which rtsold can use to launch DHCPv6
+       mkdir -p ${DESTDIR}/usr/local/libexec
+       cat > ${DESTDIR}/usr/local/libexec/rtsold-M <<'EOF'
+#!/bin/sh
+
+/usr/local/sbin/dhclient -6 -nw -N -cf /dev/null $1
+EOF
+       chmod 755 ${DESTDIR}/usr/local/libexec/rtsold-M
 
        # The EC2 console is output-only, so while printing a backtrace can
        # be useful, there's no point dropping into a debugger or waiting
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