* [dhcp-relay]: Add DHCP Relay Monitor (#3886)
DHCP relay MONitor (dhcpmon) keeps track of DORA messages. If DHCP Relay
is detected to be not forwarding DORA message, dhcpmon will log such event
to syslog. Under the hood dhcpmon keeps counts of clients DR messages,
forwarded DR messages, DHCP server OA messages, and forwarded OA messages.
dhcpmon will check every 12 sec (configurable) if counts are monotonically
increasing and record snapshot of those counters. dhcpmon will report
discrepancies when detected between current counters and snapshot counters.
pull-request: https://github.com/Azure/sonic-buildimage/pull/3886
signed-off-by: Tamer Ahmed <tamer.ahmed@microsoft.com>
* Eliminate dependency on libexplain
* Remove dependency on libexplain
* Added debug symbol to dhcp-relay.
Note: Master is different; Hence explicitly for 201811 only.
* Include debug symbols of isc-dhcp in its debug docker.
Include isc-dhcp src in source archive.
2) Install debug tools in every debug docker image
3) Install available debug symbols in debug docker image
4) Provide additional host/docker mapping for host dirs /src & /debug
4.1) The one-image will have source code under /src
4.2) /debug is mapped as rw. User can put his core file there and use this dir to
collect debug session logs too.
5) Build debug image using debug dockers
6) Source code is archived into /src of debug image
7) The welcome banner is extended to display these additional facilities in debug image.
* Add docker-dhcp-relay/Dockerfile to .gitignore
* Add isc-dhcp-relay .deb package to image build process, along with my Option 82 patch
* Install custom isc-dhcp-relay in dhcp_relay docker
* Install isc-dhcp-relay build dependencies in sonic-slave Docker container
* Copy the built .deb package to the destination directory
* Add dependencies for isc-dhcp-relay
* Change Option 82 string to '<hostname>:<portname>'
* Install dependencies of .deb files implicitly in Dockerfile
* Remove unused line
* Remove unnecessary space
* [docker-config-engine]: introduce docker sonic config engine
sonic config engine provide the sonic configure engine for all sonic
dockers that rely on the engine to generate runtime configuration.
