sonic-buildimage/dockers/docker-dhcp-relay/docker_init.sh
Joe LeVeque 1d16a37d48 [DHCP Relay]: Support Multiple VLANs (Separate DHCP Relay Agents, One Per VLAN) (#999)
* [DHCP Relay]: Support new <DhcpRelays> minigraph tag; support multiple VLANs

* Don't start dhcrelay in quiet mode so as to get startup output in syslog

* Update sonic-cfggen tests to support new '<DhcpRelays>' tag

* <DhcpRelays> tag is only present for VLANs which require a DHCP relay agent -- only parse if present

* Don't attempt to configure a DHCP relay agent for VLANs without specified DHCP servers

* Modify to work with Taoyu's minigraph/DB changes (#942)

* Reduce number of DHCP servers in sonic-cfggen unit tests from 4 to 2

* Remove isc-dhcp-relay sample output file from sonic-cfggen test, as we no longer generate that file

* Update Option 82 isc-dhcp-relay patch to load all interface name-alias maps into memory once at start instead of calling sonic-cfggen on each packet we relay

* Remove executable permission from Jinja2 template

* Set max hop count to 1 so that DHCP relay will only relay packets with a hop count of zero

* Replace tabs with spaces

* Modify overlooked sonic-cfggen call, use Config DB instead of minigraph

* Also ensure > 1 VLAN requires a DHCP relay agent before outputting to template

* Generate port name-alias map file using sonic-cfggen and parse that in lieu of parsing port_config.ini directly

* No longer drop packets with hop count > 0; Instead, drop packets which already contain agent info
2017-10-04 23:35:43 -07:00

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#!/usr/bin/env bash
# Generate supervisord config file
mkdir -p /etc/supervisor/conf.d/
sonic-cfggen -d -t /usr/share/sonic/templates/docker-dhcp-relay.supervisord.conf.j2 > /etc/supervisor/conf.d/docker-dhcp-relay.supervisord.conf
# Generate the script that waits for all interfaces to come up and make it executable
sonic-cfggen -d -t /usr/share/sonic/templates/wait_for_intf.sh.j2 > /usr/bin/wait_for_intf.sh
chmod +x /usr/bin/wait_for_intf.sh
# Generate port name-alias map for isc-dhcp-relay to parse. Each line contains one
# name-alias pair of the form "<name> <alias>"
sonic-cfggen -d --var-json "PORT" | python -c "import sys, json, os; [sys.stdout.write('%s %s\n' % (k, v['alias'] if 'alias' in v else k)) for (k, v) in json.load(sys.stdin).iteritems()]" > /tmp/port-name-alias-map.txt
# The docker container should start this script as PID 1, so now that supervisord is
# properly configured, we exec supervisord so that it runs as PID 1 for the
# duration of the container's lifetime
exec /usr/bin/supervisord