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[202012] Fix race condition between networking service and interface-config service #142

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[202012] Fix race condition between networking service and interface-config service #142

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38 changes: 32 additions & 6 deletions files/image_config/interfaces/interfaces-config.sh
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Original file line number Diff line number Diff line change
@@ -1,13 +1,39 @@
#!/bin/bash

ifdown --force eth0
function wait_networking_service_done() {
local -i _WDOG_CNT="1"
local -ir _WDOG_MAX="30"

local -r _TIMEOUT="1s"

while [[ "${_WDOG_CNT}" -le "${_WDOG_MAX}" ]]; do
networking_status="$(systemctl is-active networking 2>&1)"

if [[ "${networking_status}" == active || "${networking_status}" == inactive || "${networking_status}" == failed ]] ; then
return
fi

echo "interfaces-config: networking service is running, wait for it done"

let "_WDOG_CNT++"
sleep "${_TIMEOUT}"
done

echo "interfaces-config: networking service is still running after 30 seconds, killing it"
systemctl kill networking 2>&1
}

if [[ $(ifquery --running eth0) ]]; then
wait_networking_service_done
ifdown --force eth0
fi

# Check if ZTP DHCP policy has been installed
if [ -e /etc/network/ifupdown2/policy.d/ztp_dhcp.json ]; then
if [[ -e /etc/network/ifupdown2/policy.d/ztp_dhcp.json ]]; then
# Obtain port operational state information
redis-dump -d 0 -k "PORT_TABLE:Ethernet*" -y > /tmp/ztp_port_data.json

if [ $? -ne 0 ] || [ ! -e /tmp/ztp_port_data.json ] || [ "$(cat /tmp/ztp_port_data.json)" = "" ]; then
if [[ $? -ne 0 || ! -e /tmp/ztp_port_data.json || "$(cat /tmp/ztp_port_data.json)" = "" ]]; then
echo "{}" > /tmp/ztp_port_data.json
fi

Expand All @@ -27,11 +53,11 @@ CFGGEN_PARAMS=" \
"
sonic-cfggen $CFGGEN_PARAMS

[ -f /var/run/dhclient.eth0.pid ] && kill `cat /var/run/dhclient.eth0.pid` && rm -f /var/run/dhclient.eth0.pid
[ -f /var/run/dhclient6.eth0.pid ] && kill `cat /var/run/dhclient6.eth0.pid` && rm -f /var/run/dhclient6.eth0.pid
[[ -f /var/run/dhclient.eth0.pid ]] && kill `cat /var/run/dhclient.eth0.pid` && rm -f /var/run/dhclient.eth0.pid
[[ -f /var/run/dhclient6.eth0.pid ]] && kill `cat /var/run/dhclient6.eth0.pid` && rm -f /var/run/dhclient6.eth0.pid

for intf_pid in $(ls -1 /var/run/dhclient*.Ethernet*.pid 2> /dev/null); do
[ -f ${intf_pid} ] && kill `cat ${intf_pid}` && rm -f ${intf_pid}
[[ -f ${intf_pid} ]] && kill `cat ${intf_pid}` && rm -f ${intf_pid}
done

# Read sysctl conf files again
Expand Down