This is a specialized namespace, containing two ports,
which (hopefully) acts as completely transparent "bump-on-the-wire"
bridge.
Useful in scenarios where you want to test what happens when the flow
of packets between two nodes is disrupted. E.g., for testing fail-over
behavior in dynamic routing protocols, L2 redundancy, VRRP etc.
Now that we're using the `passthru` mode of MACVLANs, it seems we can
rely on the parent interface's promiscuity going down to 0 as an
indication that the kernel has completed the removal of the interface,
and will accept the creation of a new one.
When used as a context manager, __exit__ will be called even though
__enter__ might throw an exception half way through. So there is no
guarantee that the instance is on the cleanup list when we get to
stop().
This mode let's us receive all packets from the parent device, which
is automatically set in promiscuous mode, and let's the MACVLAN
transmit packets with any SA, which we need to implement a TPMR (or a
bridge or anything else we might dream up)
This is needed to create namespaces with MACVLANs from different
parent interfaces. The first consumer will be a Two-Port Mac
Relay (TPMR), so that we can control the flow of packets between two
nodes.
Story time:
In the days of yore, we generated PCAPs using tcpdump, which will
flush any buffered packets to its output file on reception of
SIGUSR2. Therefore we sent a USR2 before terminating the capture.
At some point, we switched over to use tshark to capture packets for
us, but the SIGUSR2 sayed in place.
It turns out, tshark will just die on USR2, abandoning the dumpcap
child it has created, which means the enclosing network namespace
can't be properly torn down.
Therefore:
Remove skip sending USR2 and just send TERM directly.
Make show interfaces container aware. This is done by looking though
all podman containers for interfaces and looking up there info from
network namespaces on the main system / hypervisor.
Interfaces controlled by containers are clearly marked in the "show
interfaces" output, with a single gray row. Telling the user that they
belong to one or more named containers. The user can then run "show
interface name NAME" on interfaces owned by containers, which provided
some additional info, such as mac address and stat counters.
The patch also add support for printing veth peers which are owned by
containers.
Lastly, the patch also adds test cases for this functionality.
Signed-off-by: Richard Alpe <richard@bit42.se>
This will facilitate running infix tests from external projects:
- eliminate the need for an external topology.dot.in file
- eliminate the requirement to manually provide external image name
Fixes#763
SVG is a plain text file, better to see why it changed
than binary PNG. Also fix#744 by adding infix/OEM hash
to test specification
Signed-off-by: Mattias Walström <lazzer@gmail.com>
This commit replaces the ietf-interfaces deviation for phys-address,
used to set custom MAC address on interfaces, with a more flexible
approach which can calculate the new MAC address based on the device's
chassi MAC, with or without an added offset.
The regression test has been updated to test all variants.
Resolves: #680
Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Use the same uptime representation as FRR does.
Example output:
DESTINATION PREF NEXT-HOP PROTO UPTIME
>* 10.0.23.0/30 0/0 e6 direct 20:10:05
192.168.3.0/24 110/1 e2 ospfv2 5d13h05m
>* 192.168.3.0/24 0/0 e2 direct 01w1d13h
Signed-off-by: Richard Alpe <richard@bit42.se>
FRR prints uptime different based on how long it is. Prior to this
commit yanger expected uptime to be on the format HH:MM:SS which it is
as long as it's shorter than a day. If it's longer the format changes,
this commit handles this.
The commit also adds unit test data triggering the different formats
(<day, <week, >week).
Side note:
cli-pretty could be made to represent the data on "FRR format" again,
which is perhaps more human friendly.
Signed-off-by: Richard Alpe <richard@bit42.se>
The ASCII art over the topology must be surrounded by .... and
is codeblock in ASCIIdoc. Since this is only used for ASCII arts
to help describe tests, border and background are white.
This can fail on two ways:
* Generate topology files
Unfortunatly the python-graphwiz has no way of detect faults
it just show 'Warning' on stderr, catch it and if != empty, exit 1
* Generate pdf
Here the default error level was FATAL, but for example a file
that is included does not exist it just show an error on stdout.
the error level is now INFO, it should always be silent.
Tobias Waldekranz