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1ff27db42f
Signed-off-by: Nazarii Hnydyn nazariig@nvidia.com Closes #17345 This W/A was proposed by Nvidia FRR team before the long term solution is ready. Why I did it A W/A to fix default route installation during LAG member flap Work item tracking N/A How I did it Disabled FRR next hop group support How to verify it Do LAG member flap
119 lines
4.5 KiB
Bash
Executable File
119 lines
4.5 KiB
Bash
Executable File
#!/usr/bin/env bash
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mkdir -p /etc/frr
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mkdir -p /etc/supervisor/conf.d
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CFGGEN_PARAMS=" \
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-d \
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-y /etc/sonic/constants.yml \
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-t /usr/share/sonic/templates/frr_vars.j2 \
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-t /usr/share/sonic/templates/supervisord/supervisord.conf.j2,/etc/supervisor/conf.d/supervisord.conf \
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-t /usr/share/sonic/templates/supervisord/critical_processes.j2,/etc/supervisor/critical_processes \
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-t /usr/share/sonic/templates/isolate.j2,/usr/sbin/bgp-isolate \
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-t /usr/share/sonic/templates/unisolate.j2,/usr/sbin/bgp-unisolate \
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"
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FRR_VARS=$(sonic-cfggen $CFGGEN_PARAMS)
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CONFIG_TYPE=$(echo $FRR_VARS | jq -r '.docker_routing_config_mode')
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update_default_gw()
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{
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IP_VER=${1}
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# FRR is not running in host namespace so we need to delete
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# default gw kernel route added by docker network via eth0 and add it back
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# with higher administrative distance so that default route learnt
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# by FRR becomes best route if/when available
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GATEWAY_IP=$(ip -${IP_VER} route show default dev eth0 | awk '{print $3}')
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#Check if docker default route is there
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if [[ ! -z "$GATEWAY_IP" ]]; then
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ip -${IP_VER} route del default dev eth0
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#Make sure route is deleted
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CHECK_GATEWAY_IP=$(ip -${IP_VER} route show default dev eth0 | awk '{print $3}')
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if [[ -z "$CHECK_GATEWAY_IP" ]]; then
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# Ref: http://docs.frrouting.org/en/latest/zebra.html#zebra-vrf
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# Zebra does treat Kernel routes as special case for the purposes of Admin Distance. \
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# Upon learning about a route that is not originated by FRR we read the metric value as a uint32_t.
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# The top byte of the value is interpreted as the Administrative Distance and
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# the low three bytes are read in as the metric.
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# so here we are programming administrative distance of 210 (210 << 24) > 200 (for routes learnt via IBGP)
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ip -${IP_VER} route add default via $GATEWAY_IP dev eth0 metric 3523215360
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fi
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fi
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}
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write_default_zebra_config()
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{
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FILE_NAME=${1}
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grep -q '^no fpm use-next-hop-groups' $FILE_NAME || {
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echo "no fpm use-next-hop-groups" >> $FILE_NAME
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echo "fpm address 127.0.0.1" >> $FILE_NAME
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}
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grep -q '^no zebra nexthop kernel enable' $FILE_NAME || {
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echo "no zebra nexthop kernel enable" >> $FILE_NAME
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}
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}
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if [[ ! -z "$NAMESPACE_ID" ]]; then
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update_default_gw 4
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update_default_gw 6
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fi
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if [ -z "$CONFIG_TYPE" ] || [ "$CONFIG_TYPE" == "separated" ]; then
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CFGGEN_PARAMS=" \
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-d \
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-y /etc/sonic/constants.yml \
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-t /usr/share/sonic/templates/bgpd/gen_bgpd.conf.j2,/etc/frr/bgpd.conf \
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-t /usr/share/sonic/templates/zebra/zebra.conf.j2,/etc/frr/zebra.conf \
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-t /usr/share/sonic/templates/staticd/gen_staticd.conf.j2,/etc/frr/staticd.conf \
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"
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MGMT_FRAMEWORK_CONFIG=$(echo $FRR_VARS | jq -r '.frr_mgmt_framework_config')
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if [ -n "$MGMT_FRAMEWORK_CONFIG" ] && [ "$MGMT_FRAMEWORK_CONFIG" != "false" ]; then
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CFGGEN_PARAMS="$CFGGEN_PARAMS \
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-t /usr/local/sonic/frrcfgd/bfdd.conf.j2,/etc/frr/bfdd.conf \
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-t /usr/local/sonic/frrcfgd/ospfd.conf.j2,/etc/frr/ospfd.conf \
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"
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else
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rm -f /etc/frr/bfdd.conf /etc/frr/ospfd.conf
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fi
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sonic-cfggen $CFGGEN_PARAMS
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echo "no service integrated-vtysh-config" > /etc/frr/vtysh.conf
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rm -f /etc/frr/frr.conf
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elif [ "$CONFIG_TYPE" == "split" ]; then
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echo "no service integrated-vtysh-config" > /etc/frr/vtysh.conf
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rm -f /etc/frr/frr.conf
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write_default_zebra_config /etc/frr/zebra.conf
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elif [ "$CONFIG_TYPE" == "split-unified" ]; then
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echo "service integrated-vtysh-config" > /etc/frr/vtysh.conf
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rm -f /etc/frr/bgpd.conf /etc/frr/zebra.conf /etc/frr/staticd.conf
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write_default_zebra_config /etc/frr/frr.conf
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elif [ "$CONFIG_TYPE" == "unified" ]; then
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CFGGEN_PARAMS=" \
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-d \
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-y /etc/sonic/constants.yml \
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-t /usr/share/sonic/templates/gen_frr.conf.j2,/etc/frr/frr.conf \
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"
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sonic-cfggen $CFGGEN_PARAMS
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echo "service integrated-vtysh-config" > /etc/frr/vtysh.conf
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rm -f /etc/frr/bgpd.conf /etc/frr/zebra.conf /etc/frr/staticd.conf \
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/etc/frr/bfdd.conf /etc/frr/ospfd.conf /etc/frr/pimd.conf
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fi
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chown -R frr:frr /etc/frr/
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chown root:root /usr/sbin/bgp-isolate
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chmod 0755 /usr/sbin/bgp-isolate
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chown root:root /usr/sbin/bgp-unisolate
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chmod 0755 /usr/sbin/bgp-unisolate
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mkdir -p /var/sonic
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echo "# Config files managed by sonic-config-engine" > /var/sonic/config_status
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TZ=$(cat /etc/timezone)
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rm -rf /etc/localtime
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ln -sf /usr/share/zoneinfo/$TZ /etc/localtime
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exec /usr/local/bin/supervisord
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