diskimage-builder/diskimage_builder/elements/dhcp-all-interfaces/install.d/50-dhcp-all-interfaces
Harald Jensås f94508d537 Add IPv6 support in dhcp-all-interfaces
When the rdisc6 utility is available probe for router
advertisement. configure eni and rhel-netscripts interfaces
to do IPv6 address configuration according to the flags
in the RA recived from the router.

The systemd service file timeout is DIB_DHCP_TIMEOUT * 2,
so that DHCPv4 can timout, and dhcpv6 run before the service
times out.

Retries are commented in dhclient.conf, without it we end up
trying DIB_DHCP_TIMEOUT * 60 before the client move on to
IPv6.

WHEN:
  Stateful address conf.    :          No
  Stateful other conf.      :          No
THEN:
  Do not run dhclient at all, autoconfiguration via
  SLAAC only.

WHEN:
  Stateful address conf.    :          No
  Stateful other conf.      :          Yes
THEN:
  Run "dhclient -6 -S", The ``-S`` option makes the
  dhcp client not request an address, only other
  options such as DNS servers and NTP servers from
  DHCPv6 server.

WHEN:
  Stateful address conf.    :          Yes
  Stateful other conf.      :          Yes
THEN:
  The dhcp client should request an address _and_ other
  options such as DNS servers and NTP servers from
  DHCPv6 server.

NOTE: No IPv6 support added for suse-netscripts

Closes-Bug: 1754219
Change-Id: Icdc79875c33f894ab7eaec8afdfb33a731efff99
2019-11-13 09:31:01 +01:00

51 lines
2.4 KiB
Bash
Executable File

#!/bin/bash
if [ ${DIB_DEBUG_TRACE:-1} -gt 0 ]; then
set -x
fi
set -eu
set -o pipefail
SCRIPTDIR=$(dirname $0)
# this script is not needed on Gentoo.
if [ "$DISTRO_NAME" != "gentoo" ]; then
install -D -g root -o root -m 0755 ${SCRIPTDIR}/dhcp-all-interfaces.sh /usr/local/sbin/dhcp-all-interfaces.sh
sed -i "s/DIB_DHCP_TIMEOUT/${DIB_DHCP_TIMEOUT:-30}/" /usr/local/sbin/dhcp-all-interfaces.sh
fi
if [ -f /etc/dhcp/dhclient.conf ] ; then
# Set the dhclient timeout configurations to match DIB_DHCP_TIMEOUT,
if grep -o "^timeout " /etc/dhcp/dhclient.conf ; then
sed -i -e "s/^timeout .*/# \"timeout\" Value set by dhcp-all-interfaces\ntimeout ${DIB_DHCP_TIMEOUT:-30};/" /etc/dhcp/dhclient.conf
else
echo -e "# \"timeout\" Value set by dhcp-all-interfaces\ntimeout ${DIB_DHCP_TIMEOUT:-30};" >> /etc/dhcp/dhclient.conf
fi
if grep -o "^retry " /etc/dhcp/dhclient.conf ; then
sed -i -e '/^retry/s/^/# \"retry\" Value commented by dhcp-all-interfaces\n# /g' /etc/dhcp/dhclient.conf
fi
fi
if [ "$DIB_INIT_SYSTEM" == "upstart" ]; then
if [ -e "/etc/redhat-release" ] ; then
# the init system is upstart but networking is using sysv compatibility (i.e. Centos/RHEL 6)
install -D -g root -o root -m 0755 ${SCRIPTDIR}/dhcp-all-interfaces.init /etc/init.d/dhcp-all-interfaces
chkconfig dhcp-all-interfaces on
else
install -D -g root -o root -m 0755 ${SCRIPTDIR}/dhcp-all-interfaces.conf /etc/init/dhcp-all-interfaces.conf
fi
elif [ "$DIB_INIT_SYSTEM" == "systemd" ]; then
install -D -g root -o root -m 0644 ${SCRIPTDIR}/dhcp-interface@.service /usr/lib/systemd/system/dhcp-interface@.service
install -D -g root -o root -m 0644 ${SCRIPTDIR}/dhcp-all-interfaces-udev.rules /etc/udev/rules.d/99-dhcp-all-interfaces.rules
sed -i "s/TimeoutStartSec=DIB_DHCP_TIMEOUT/TimeoutStartSec=$(( ${DIB_DHCP_TIMEOUT:-30} * 2 ))s/" /usr/lib/systemd/system/dhcp-interface@.service
elif [ "$DIB_INIT_SYSTEM" == "sysv" ]; then
install -D -g root -o root -m 0755 ${SCRIPTDIR}/dhcp-all-interfaces.init /etc/init.d/dhcp-all-interfaces
update-rc.d dhcp-all-interfaces defaults
elif [ "$DISTRO_NAME" == "gentoo" ]; then
# let ipv6 use normal slaac
sed -i 's/slaac/#slaac/g' /etc/dhcpcd.conf
# don't let dhcpcd set domain name or hostname
sed -i 's/domain_name\,\ domain_search\,\ host_name/domain_search/g' /etc/dhcpcd.conf
rc-update add dhcpcd default
fi