network-observability-cli is a lightweight Flow and Packet visualization tool. It deploys NetObserv eBPF agent on your k8s cluster to collect flows or packets from nodes network interfaces and streams data to a local collector for analysis and visualization. Output files are generated under output/flow and output/pcap directories per host name

Work In Progress

This project is still a WIP. The following list gives an overview of the current progression:

• Capture flows
• Capture packets
• Basic filter capabilities
• Advanced filter capabilities
• Testing
• Linting
• Dockerfile
• Allow switching between kubectl / oc commands

Feel free to contribute !

Prerequisites

To run this CLI, you will need:

• A running kubernetes / OpenShift cluster
• oc command installed and connected
• Cluster admin rights

Build

To build the project locally:

This will also copy resources and oc commands to the build directory.

Run

Flow Capture

Simply run the following command to start capturing flows:

./build/oc-netobserv-flows

It will display a table view with latest flows collected and write data under output/flow directory. To stop capturing press Ctrl-C.

Packet Capture

PCAP generated files are compatible with Wireshark

./build/oc-netobserv-packets <filters>

For example:

./build/oc-netobserv-packets "tcp,8080"

It will display a table view with latest packets collected and write data under output/pcap directory. To stop capturing press Ctrl-C.

Cleanup

The cleanup function will automatically remove the eBPF programs when the CLI exits. However you may need to run it manually if an error occurs.

./build/oc-netobserv-cleanup

Extending OpenShift CLI with plugin

You can add this plugin to your favorite oc commands using the following steps:

This will add oc netobserv flows and oc netobserv packets commands to your CLI. You can verify the commands are available using:

It will display as result:

The following compatible plugins are available:
...
/usr/bin/oc-netobserv-cleanup
/usr/bin/oc-netobserv-flows
/usr/bin/oc-netobserv-packets

More info on official OpenShift documentation.