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sonic-buildimage/dockers/docker-fpm-frr/docker_init.sh
Joe LeVeque 7bf05f7f4f
[supervisor] Install vanilla package once again, install Python 3 version in Buster container (#5546)
**- Why I did it**

We were building a custom version of Supervisor because I had added patches to prevent hangs and crashes if the system clock ever rolled backward. Those changes were merged into the upstream Supervisor repo as of version 3.4.0 (http://supervisord.org/changes.html#id9), therefore, we should be able to simply install the vanilla package via pip. This will also allow us to easily move to Python 3, as Python 3 support was added in version 4.0.0.

**- How I did it**

- Remove Makefiles and patches for building supervisor package from source
- Install Python 3 supervisor package version 4.2.1 in Buster base container
    - Also install Python 3 version of supervisord-dependent-startup in Buster base container
- Debian package installed binary in `/usr/bin/`, but pip package installs in `/usr/local/bin/`, so rather than update all absolute paths, I changed all references to simply call `supervisord` and let the system PATH find the executable to prevent future need for changes just in case we ever need to switch back to build a Debian package, then we won't need to modify these again.
- Install Python 2 supervisor package >= 3.4.0 in Stretch and Jessie base containers
2020-11-19 23:41:32 -08:00

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#!/usr/bin/env bash
mkdir -p /etc/frr
mkdir -p /etc/supervisor/conf.d
CFGGEN_PARAMS=" \
-d \
-y /etc/sonic/constants.yml \
-t /usr/share/sonic/templates/supervisord/frr_vars.j2 \
-t /usr/share/sonic/templates/supervisord/supervisord.conf.j2,/etc/supervisor/conf.d/supervisord.conf \
-t /usr/share/sonic/templates/bgpd/bgpd.conf.j2,/etc/frr/bgpd.conf \
-t /usr/share/sonic/templates/zebra/zebra.conf.j2,/etc/frr/zebra.conf \
-t /usr/share/sonic/templates/staticd/staticd.conf.j2,/etc/frr/staticd.conf \
-t /usr/share/sonic/templates/frr.conf.j2,/etc/frr/frr.conf \
-t /usr/share/sonic/templates/isolate.j2,/usr/sbin/bgp-isolate \
-t /usr/share/sonic/templates/unisolate.j2,/usr/sbin/bgp-unisolate \
"
CONFIG_TYPE=$(sonic-cfggen $CFGGEN_PARAMS)
update_default_gw()
{
IP_VER=${1}
# FRR is not running in host namespace so we need to delete
# default gw kernel route added by docker network via eth0 and add it back
# with higher administrative distance so that default route learnt
# by FRR becomes best route if/when available
GATEWAY_IP=$(ip -${IP_VER} route show default dev eth0 | awk '{print $3}')
#Check if docker default route is there
if [[ ! -z "$GATEWAY_IP" ]]; then
ip -${IP_VER} route del default dev eth0
#Make sure route is deleted
CHECK_GATEWAY_IP=$(ip -${IP_VER} route show default dev eth0 | awk '{print $3}')
if [[ -z "$CHECK_GATEWAY_IP" ]]; then
# Ref: http://docs.frrouting.org/en/latest/zebra.html#zebra-vrf
# Zebra does treat Kernel routes as special case for the purposes of Admin Distance. \
# Upon learning about a route that is not originated by FRR we read the metric value as a uint32_t.
# The top byte of the value is interpreted as the Administrative Distance and
# the low three bytes are read in as the metric.
# so here we are programming administrative distance of 210 (210 << 24) > 200 (for routes learnt via IBGP)
ip -${IP_VER} route add default via $GATEWAY_IP dev eth0 metric 3523215360
fi
fi
}
if [[ ! -z "$NAMESPACE_ID" ]]; then
update_default_gw 4
update_default_gw 6
fi
if [ -z "$CONFIG_TYPE" ] || [ "$CONFIG_TYPE" == "separated" ]; then
echo "no service integrated-vtysh-config" > /etc/frr/vtysh.conf
rm -f /etc/frr/frr.conf
elif [ "$CONFIG_TYPE" == "unified" ]; then
echo "service integrated-vtysh-config" > /etc/frr/vtysh.conf
rm -f /etc/frr/bgpd.conf /etc/frr/zebra.conf /etc/frr/staticd.conf
fi
chown -R frr:frr /etc/frr/
chown root:root /usr/sbin/bgp-isolate
chmod 0755 /usr/sbin/bgp-isolate
chown root:root /usr/sbin/bgp-unisolate
chmod 0755 /usr/sbin/bgp-unisolate
mkdir -p /var/sonic
echo "# Config files managed by sonic-config-engine" > /var/sonic/config_status
exec supervisord