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[baseimage]: Initial changes for dhcp to support eth0 in a mgmt vrf (#2348)

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* Initial changes to support eth0 in a mgmt vrf
This commit is contained in:
Nikos 2019-01-15 18:15:56 -08:00 committed by lguohan
parent b7330ddfc3
commit e55a7d7db7
3 changed files with 239 additions and 7 deletions
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6
build_debian.sh
View File

@ -200,7 +200,7 @@ sudo LANG=C chroot $FILESYSTEM_ROOT apt-get -y install \
## Note: don't install python-apt by pip, older than Debian repo one
sudo LANG=C DEBIAN_FRONTEND=noninteractive chroot $FILESYSTEM_ROOT apt-get -y install \
file \
ifupdown \
ifupdown2 \
iproute2 \
bridge-utils \
isc-dhcp-client \
@ -232,6 +232,7 @@ sudo LANG=C DEBIAN_FRONTEND=noninteractive chroot $FILESYSTEM_ROOT apt-get -y in
unzip \
gdisk \
sysfsutils \
squashfs-tools \
grub2-common \
rsyslog \
ethtool \
@ -340,6 +341,8 @@ set /files/etc/sysctl.conf/net.ipv6.conf.eth0.keep_addr_on_down 1
set /files/etc/sysctl.conf/net.ipv6.conf.eth0.accept_ra_defrtr 0
set /files/etc/sysctl.conf/net.ipv4.tcp_l3mdev_accept 1
set /files/etc/sysctl.conf/net.core.rmem_max 2097152
set /files/etc/sysctl.conf/net.core.wmem_max 2097152
" -r $FILESYSTEM_ROOT
@ -368,6 +371,7 @@ sudo cp files/dhcp/rfc3442-classless-routes $FILESYSTEM_ROOT/etc/dhcp/dhclient-e
sudo cp files/dhcp/sethostname $FILESYSTEM_ROOT/etc/dhcp/dhclient-exit-hooks.d/
sudo cp files/dhcp/graphserviceurl $FILESYSTEM_ROOT/etc/dhcp/dhclient-exit-hooks.d/
sudo cp files/dhcp/snmpcommunity $FILESYSTEM_ROOT/etc/dhcp/dhclient-exit-hooks.d/
sudo cp files/dhcp/vrf $FILESYSTEM_ROOT/etc/dhcp/dhclient-exit-hooks.d/
sudo cp files/dhcp/dhclient.conf $FILESYSTEM_ROOT/etc/dhcp/
## Version file

6
files/build_templates/sonic_debian_extension.j2
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@ -260,12 +260,6 @@ sudo dpkg --root=$FILESYSTEM_ROOT -P {{ debname }}
sudo rm -f $FILESYSTEM_ROOT/usr/sbin/policy-rc.d
## Revise /etc/init.d/networking and /lib/systemd/system/networking.service for Arista switches
if [ "$image_type" = "aboot" ]; then
sudo sed -i 's/udevadm settle/udevadm settle -E \/sys\/class\/net\/eth0/' $FILESYSTEM_ROOT/etc/init.d/networking
sudo sed -i 's/udevadm settle/udevadm settle -E \/sys\/class\/net\/eth0/' $FILESYSTEM_ROOT/lib/systemd/system/networking.service
fi
## copy platform rc.local
sudo cp $IMAGE_CONFIGS/platform/rc.local $FILESYSTEM_ROOT/etc/

234
files/dhcp/vrf Normal file
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@ -0,0 +1,234 @@
#
# DHCLIENT exit hook for vrf support.
#
# Code ported from https://github.com/CumulusNetworks/vrf under GPLv2 license
# (see https://github.com/CumulusNetworks/vrf/blob/master/debian/copyright).
#
# Get table_id for device enslaved to a vrf.
vrf_get_table_dev()
{
local table_id
# If vrf_slave is not in the output, device is not enslaved.
table_id=$(ip -o -d link show dev ${1} 2>/dev/null |\
egrep ' vrf_slave table [0-9]*' |\
sed -e 's/.*vrf_slave table \([0-9]*\) .*/\1/')
[ -z "${table_id}" ] && return 1
echo ${table_id}
return 0
}
# Get table_id for vrf device.
vrf_get_table()
{
local table_id
table_id=$(ip -o -d link show dev ${1} 2>/dev/null |\
egrep ' vrf table [0-9]*' |\
sed -e 's/.*vrf table \([0-9]*\) .*/\1/')
[ -z "${table_id}" ] && return 1
echo ${table_id}
return 0
}
vrf_exists()
{
local vrf=${1}
local n
[ "$vrf" = "default" ] && return 0
# ip link show dev <name> type vrf happily returns 0 even though
# <name> is not of type vrf. Hence the wc -l.
n=$(ip -br link show dev ${vrf} type vrf 2>/dev/null | wc -l)
[ ${n} -eq 1 ] && return 0
return $?
}
# Check vrf device contains only alphanumeric characters.
get_vrf_arg()
{
local vrf
vrf=$(echo $1 | tr -cd [:alnum:])
if [ "$vrf" != "$1" ]; then
echo "Invalid VRF" >&2
return 1
fi
echo $vrf
}
vrf_table()
{
local table_id
local vrf
vrf=$(get_vrf_arg ${1})
[ $? -ne 0 ] && return 1
vrf_exists $vrf
if [ $? -eq 0 ]; then
vrf_get_table $vrf
return 0
fi
# Maybe this is a device, not a vrf.
table_id=$(vrf_get_table_dev $vrf)
if [ $? -eq 0 ]; then
echo ${table_id}
return 0
fi
return 1
}
table_id=$(vrf_table ${interface})
if [ -n "${table_id}" ]; then
case "$reason" in
BOUND|RENEW|REBIND|REBOOT)
if [ -z "$old_ip_address" ] ||
[ "$old_ip_address" != "$new_ip_address" ] ||
[ "$reason" = "BOUND" ] || [ "$reason" = "REBOOT" ]; then
# If we have $new_rfc3442_classless_static_routes then we have to
# ignore $new_routers entirely.
if [ ! "$new_rfc3442_classless_static_routes" ]; then
# Set if_metric if IF_METRIC is set or there's more than one router.
if_metric="$IF_METRIC"
if [ "${new_routers%% *}" != "${new_routers}" ]; then
if_metric=${if_metric:-1}
fi
for router in $new_routers; do
if [ "$new_subnet_mask" = "255.255.255.255" ]; then
# Set explicit route for p2p connection.
ip -4 route add table ${table_id} ${router} dev $interface >/dev/null 2>&1
fi
# Remove old default route should it remain from dhclient-script.
ip -4 route del default via ${router} dev ${interface} \
${if_metric:+metric $if_metric} >/dev/null 2>&1
# Set default route.
ip -4 route add table ${table_id} default via ${router} dev ${interface} \
${if_metric:+metric $if_metric} >/dev/null 2>&1
if [ -n "$if_metric" ]; then
if_metric=$((if_metric+1))
fi
done
else
set -- $new_rfc3442_classless_static_routes
while [ $# -gt 0 ]; do
net_length=$1
via_arg=''
case $net_length in
32|31|30|29|28|27|26|25)
if [ $# -lt 9 ]; then
return 1
fi
net_address="${2}.${3}.${4}.${5}"
gateway="${6}.${7}.${8}.${9}"
shift 9
;;
24|23|22|21|20|19|18|17)
if [ $# -lt 8 ]; then
return 1
fi
net_address="${2}.${3}.${4}.0"
gateway="${5}.${6}.${7}.${8}"
shift 8
;;
16|15|14|13|12|11|10|9)
if [ $# -lt 7 ]; then
return 1
fi
net_address="${2}.${3}.0.0"
gateway="${4}.${5}.${6}.${7}"
shift 7
;;
8|7|6|5|4|3|2|1)
if [ $# -lt 6 ]; then
return 1
fi
net_address="${2}.0.0.0"
gateway="${3}.${4}.${5}.${6}"
shift 6
;;
0) # default route
if [ $# -lt 5 ]; then
return 1
fi
net_address="0.0.0.0"
gateway="${2}.${3}.${4}.${5}"
shift 5
;;
*) # error
return 1
;;
esac
# Take care of link-local routes.
if [ "${gateway}" != '0.0.0.0' ]; then
via_arg="via ${gateway}"
fi
# Set route (ip detects host routes automatically).
ip -4 route add table ${table_id} "${net_address}/${net_length}" \
${via_arg} dev "${interface}" >/dev/null 2>&1
done
fi
fi
if [ -n "$alias_ip_address" ] &&
[ "$new_ip_address" != "$alias_ip_address" ]; then
ip -4 route add table ${table_id} ${alias_ip_address} dev ${interface} >/dev/null 2>&1
fi
;;
EXPIRE|FAIL|RELEASE|STOP)
if [ -n "$alias_ip_address" ]; then
ip -4 route add table ${table_id} ${alias_ip_address} dev ${interface} >/dev/null 2>&1
fi
;;
TIMEOUT)
# If there is no router recorded in the lease or the 1st router answers pings.
if [ -z "$new_routers" ] || ping -q -c 1 "${new_routers%% *}"; then
# If we have $new_rfc3442_classless_static_routes then we have to
# ignore $new_routers entirely.
if [ ! "$new_rfc3442_classless_static_routes" ]; then
if [ -n "$alias_ip_address" ] &&
[ "$new_ip_address" != "$alias_ip_address" ]; then
ip -4 route add table ${table_id} ${alias_ip_address} dev ${interface} >/dev/null 2>&1
fi
# Set default route.
for router in $new_routers; do
ip -4 route add table ${table_id} default via ${router} dev ${interface} \
${if_metric:+metric $if_metric} >/dev/null 2>&1
if [ -n "$if_metric" ]; then
if_metric=$((if_metric+1))
fi
done
fi
fi
;;
esac
fi