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https://github.com/amorenoz/ovsdb-mon

An OVSDB database visualization tool based on auto-generated schema bindings
https://github.com/amorenoz/ovsdb-mon

golang ovn ovs ovsdb

Last synced: 14 days ago
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An OVSDB database visualization tool based on auto-generated schema bindings

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# ovsdb-mon



ovsdb-mon is an OVSDB monitoring and visulization tool based on [libovsdb](https://github.com/ovn-org/libovsdb)



### Building ovsdb-mon

A common usage for this tool is to monitor an OVN database. However, it is generic enough to be used with

any OVSDB schema. By default, ovsdb-mon uses the schema defined in *schemas/ovn-nb.ovsschema*. If you want to

use your own, simply download it from your ovsdb server and replace the existing one



     ovsdb-client get-schema ${SERVER} ${DATABASE} > schemas/my.ovsschema



Then, just build the program specifying a schema file



     make SCHEMA=schemas/my.ovsschema



This will use modelgen to generate a native model of the DB and use it to build ovsdb-mon



### Using ovsdb-mon

Usage of ovsdb-mon:



	./bin/ovsdb-mon [FLAGS] [COMMAND]

	FLAGS:

	  -auto

	        Autostart: If set to true, it will start monitoring from the begining

	  -db string

	        Database connection. Default: unix:/${OVS_RUNDIR}/ovnnb_db.sock

	  -monitor string

	        Only monitor these comma-separated tables

	  -no-monitor string

	        Do not monitor these comma-separated tables

	COMMAND:

	        If provided, it will run the command and exit. If not, it will enter interactive mode

	        For a full description of available commands use the command 'help'



By default it will open an interactive terminal where you can monitor the activity of the DB and inspect it:



	./bin/ovsdb-mon  --db tcp:172.19.0.4:6641

	OVN Monitoring Shell

	>>> help

	Commands:

	  clear      clear the screen

	  exit       exit the program

	  help       display help

	  list       List the content of a specific table

	  save       Save events

	  show       Print available tables

	  start      Start monitoring activity of the OVN DB

	  stop       Stop monitoring activity of the OVN DB



The result looks like this:



![Demo](doc/images/demo.gif)



### Kubernetes



Use the yaml and scripts provided in the dist folder in order to deploy pods that

provide a ready to use binary for the K8 cluster.



	[ -n ${KUBECONFIG} ] || echo Make sure kubectl command can reach the cluster

    cd dist

    source ./ovsdb-mon-ovn.source

    source ./ovsdb-mon-ovs.source



**Note:** Pod Security Admission must be taken into account when deploying ovsdb-mon,

since it needs to access the host network. Being so, a namespace will be created

with the required labels, and used by ovsdb-mon pod(s).

For more info, see [the pod-security-admission documentation](https://kubernetes.io/docs/concepts/security/pod-security-admission/#pod-security-admission-labels-for-namespaces).



### Local machine (e.g: Openstack node)



If there is an OVN control plane or OVS running locally, run the following command

to spin up the container:



For OVN and OVS (e.g: controller):



    $ podman run --detach --name ovsdb-mon --rm --network=host -v /var/lib/openvswitch/ovn:/var/lib/openvswitch/ovn -v /var/run/openvswitch:/var/run/openvswitch quay.io/amorenoz/ovsdb-mon:latest



For OVS-only (e.g: compute):



    $ podman run --detach --name ovsdb-mon --rm --network=host -v /var/run/openvswitch:/var/run/openvswitch quay.io/amorenoz/ovsdb-mon:latest



*Note*: The paths where OVS and OVN socket files are placed might be different in your distro. The container will try some common places but if it doesn't work for you, please raise an Issue.



To start monitoring run:



OVN_NorthBound:



    $ podman exec -it ovsdb-mon ovsdb-mon.OVN_Northbound



OVN_SouthBound:



    $ podman exec -it ovsdb-mon ovsdb-mon.OVN_Southbound



OVS:



    $ podman exec -it ovsdb-mon ovsdb-mon.Open_vSwitch