sig_cloud/diskimage-builder
2
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Add IPv6 support in dhcp-all-interfaces

Browse Source 
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
This commit is contained in:
Harald Jensås 2019-10-30 12:27:30 +01:00
parent 6758849b66
commit f94508d537
4 changed files with 84 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
diskimage_builder/elements/dhcp-all-interfaces/install.d/50-dhcp-all-interfaces
View File

@ -21,6 +21,9 @@ if [ -f /etc/dhcp/dhclient.conf ] ; then
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
@ -34,7 +37,7 @@ if [ "$DIB_INIT_SYSTEM" == "upstart" ]; then
elif [ "$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}s/" /usr/lib/systemd/system/dhcp-interface@.service
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

73
diskimage_builder/elements/dhcp-all-interfaces/install.d/dhcp-all-interfaces.sh
View File

@ -47,15 +47,54 @@ function get_if_type() {
function enable_interface() {
local interface=$1
local ipv6_init=$2
local ipv6_AdvManagedFlag=$3
local ipv6_AdvOtherConfigFlag=$4
serialize_me
if [ "$CONF_TYPE" == "eni" ]; then
printf "auto $interface\niface $interface inet dhcp\n\n" >>$ENI_FILE
if [ "$ipv6_init" == "True" ]; then
# Make DUID-UUID Type 4 (RFC 6355)
echo "default-duid \"\\x00\\x04$(sed 's/.\{2\}/\\x&/g' < /etc/machine-id)\";" >"/var/lib/dhclient/dhclient6--$interface.lease"
if [ $ipv6_AdvManagedFlag == "Yes" ]; then
# IPv6 DHCPv6 Stateful address configuration
printf "iface $interface inet6 dhcp\n\n" >>$ENI_FILE
echo "DHCPv6 Stateful Configured."
elif [ $ipv6_AdvOtherConfigFlag == "Yes" ]; then
# IPv6 DHCPv6 Stateless address configursation
printf "iface $interface inet6 auto\n\tdhcp 1\n\n" >>$ENI_FILE
echo "DHCPv6 Stateless Configured."
else
# IPv6 Autoconfiguration (SLAAC)
printf "iface $interface inet6 auto\tdhcp 0\n\n" >>$ENI_FILE
echo "IPv6 SLAAC Configured"
fi
fi
printf "\n" >>$ENI_FILE
elif [ "$CONF_TYPE" == "rhel-netscripts" ]; then
if [ "$(get_if_type $interface)" == "32" ]; then
printf "DEVICE=\"$interface\"\nBOOTPROTO=\"dhcp\"\nONBOOT=\"yes\"\nTYPE=\"InfiniBand\"\nCONNECTED_MODE=\"no\"\nDEFROUTE=\"yes\"\nPEERDNS=\"yes\"\nPEERROUTES=\"yes\"\nIPV4_FAILURE_FATAL=\"yes\"\nIPV6INIT=\"no\"" >"${SCRIPTS_PATH}ifcfg-$interface"
else
printf "DEVICE=\"$interface\"\nBOOTPROTO=\"dhcp\"\nONBOOT=\"yes\"\nTYPE=\"Ethernet\"" >"${SCRIPTS_PATH}ifcfg-$interface"
printf "DEVICE=\"$interface\"\nBOOTPROTO=\"dhcp\"\nONBOOT=\"yes\"\nTYPE=\"Ethernet\"\n" >"${SCRIPTS_PATH}ifcfg-$interface"
if [ "$ipv6_init" == "True" ]; then
# Make DUID-UUID Type 4 (RFC 6355)
echo "default-duid \"\\x00\\x04$(sed 's/.\{2\}/\\x&/g' < /etc/machine-id)\";" >"/var/lib/dhclient/dhclient6--$interface.lease"
printf "IPV6INIT=\"yes\"\n" >>"${SCRIPTS_PATH}ifcfg-$interface"
if [ $ipv6_AdvManagedFlag == "Yes" ]; then
# IPv6 DHCPv6 Stateful address configuration
printf "IPV6_FORCE_ACCEPT_RA=\"yes\"\nDHCPV6C=\"yes\"\n" >>"${SCRIPTS_PATH}ifcfg-$interface"
echo "DHCPv6 Stateful Configured"
elif [ $ipv6_AdvOtherConfigFlag == "Yes" ]; then
# IPv6 DHCPv6 Stateless address configursation
printf "IPV6_AUTOCONF=\"yes\"\nDHCPV6C=\"yes\"\nDHCPV6C_OPTIONS=\"-S\"\n" >>"${SCRIPTS_PATH}ifcfg-$interface"
echo "DHCPv6 Stateless Configured"
else
# IPv6 Autoconfiguration (SLAAC)
printf "IPV6_AUTOCONF=\"yes\"\n" >>"${SCRIPTS_PATH}ifcfg-$interface"
echo "IPv6 SLAAC Configured"
fi
fi
fi
elif [ "$CONF_TYPE" == "suse-netscripts" ]; then
printf "BOOTPROTO=\"dhcp\"\nSTARTMODE=\"auto\"" >"${SCRIPTS_PATH}ifcfg-$interface"
@ -106,7 +145,37 @@ function inspect_interface() {
sleep 1
done
if [ "$has_link" == "1" ]; then
enable_interface "$interface"
local ipv6_init=False
local ipv6_AdvManagedFlag=No
local ipv6_AdvOtherConfigFlag=No
if type rdisc6 &>/dev/null; then
# We have rdisc6, let's try to configure IPv6 autoconfig/dhcpv6
tries=DIB_DHCP_TIMEOUT
for ((; tries > 0; tries--)); do
# Need to retry this, link-local-address required for
# Neighbor Discovery, DHCPv6 etc.
set +e # Do not exit on error, capture rdisc6 error codes.
RA=$(rdisc6 --retry 3 --single "$interface" 2>/dev/null)
local return_code=$?
set -e # Re-enable exit on error.
if [ $return_code -eq 0 ]; then
ipv6_init=True
ipv6_AdvManagedFlag=$(echo "$RA" | grep "Stateful address conf." | awk -F: '{ print $2 }')
ipv6_AdvOtherConfigFlag=$(echo "$RA" | grep "Stateful other conf." | awk -F: '{ print $2 }')
elif [ $return_code -eq 1 ]; then
sleep 1
elif [ $return_code -eq 2 ]; then
# If rdisc6 does not receive any response after the
# specified number of attempts waiting for wait_ms
# (1000ms by default) milliseconds each time, it will
# exit with code 2.
break
fi
done
else
echo "rdisc6 not available, skipping IPv6 configuration."
fi
enable_interface "$interface" "$ipv6_init" "$ipv6_AdvManagedFlag" "$ipv6_AdvOtherConfigFlag"
else
echo "No link detected, skipping"
fi

1
diskimage_builder/elements/dhcp-all-interfaces/package-installs.yaml
View File

@ -1,2 +1,3 @@
dhcp-client:
ifupdown:
ndisc6:

12
diskimage_builder/elements/dhcp-all-interfaces/pkg-map
View File

@ -1,20 +1,24 @@
{
"family": {
"redhat": {
"dhcp-client": "dhclient"
"dhcp-client": "dhclient",
"ndisc6": "ndisc6"
},
"gentoo": {
"dhcp-client": "net-misc/dhcpcd"
"dhcp-client": "net-misc/dhcpcd",
"ndisc6": "net-misc/ndisc6"
},
"suse": {
"dhcp-client": "dhcp-client"
},
"debian": {
"ifupdown": "ifupdown"
"ifupdown": "ifupdown",
"ndisc6": "ndisc6"
}
},
"default": {
"dhcp-client": "isc-dhcp-client",
"ifupdown": ""
"ifupdown": "",
"ndisc6": ""
}
}