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Release 0.69#

2025-07-18 ยท Full Changelog

Nokia SR-SIM#

An exciting addition to our list of supported nodes is the Nokia SR-SIM system that is identified with nokia_srsim in the topology file. This is an official native containerized version of the Nokia SR OS simulator, which allows you to run Nokia's SR OS in a container-based environment without the compromises of a VM-based simulator we used in the past.

That's right, the same feature set as in the VM-based simulator, but now in a native container. But there is more! The SR-SIM container supports a better way to run the distributed chassis, where each IOM and CPM is a standalone container for a nicer scheduling and workload distribution.

And it runs on macOS and Windows too!

The team spent quite some time on the docs and examples which we encourage you to check out!

Note

You need a license to run the SR-SIM container.

Thanks to @sacckth @steiler @kaelemc and @vista- for their contributions!

Juniper cJunosEvolved#

More good news for Juniper users! A first-time contribution from @kmo7 added support for cJunosEvolved, an official container package from Juniper that comes packaged with all bells and whistles to run a Junos Evolved VM. Double kudos to them for contributing this right at release time!

VyOS#

If you thought two new kinds in a single release was enough, hold your horses! @evilhamsterman added support for the VyOS containerized network operating system in #2630.

Groups#

If you have been with us for a while, you know that we have the following inheritance model in the topology file:

graph TD;
  A[Topology Defaults Parameters] --> B[Kind Parameters] --> C[Node Parameters];

With Node parameters being the most specific and overriding the previous two. This is a decent model that served us well, but it had a limitation that you could not create parameters for an arbitrary group and then make a node inherit from it.

A practical use case for this to create separate groups for different roles of nodes, e.g. core, leaf, spine, etc. and then have the nodes inherit from these groups. This is possible now with the groups section in the topology file.

Configuration save for VM nodes#

The save command for VM-based kinds has been significantly improved in #2659 by @vista-. The save command will now copy the configuration out to the host filesystem and store it in the lab directory for most VM-based kinds running the following NOSes:

  • Arista EOS
  • Cisco IOS XE
  • Cisco IOS XR
  • Cisco NX-OS
  • Juniper Junos and Junos EVO

GoTTY#

In the previous release we introduced SSHX feature to share a collaborative terminal session with others. While SSHX is awesome and claims to be secure, some users still prefer to self-host their terminal sharing solution. For those users, @FloSch62 added support for the GoTTY tool #2583. Nice!

Nornir group support#

Nornir inventory can now be generated with inventory groups. Thanks to @mpfz0r in #2593 for this contribution!

Docker network driver options#

With #2648 by @vista- merged, you can now specify docker network bridge driver options to control the management network behavior.

CSV for inspect#

Is Excel your source of truth? No need to be shy. Make use of the new output format of the inspect command that prints the data in the CSV format. #2651

S3 URLs#

Thanks to @hyposcaler-bot and their work in #2644 you can now use S3 URLs to refer to a topology file or a startup-config file.

Miscellaneous#

  • podman pull-policy=always support #2577
  • support for extended links format in json schema #2588
  • fix for the health status report in the inspec #2594
  • ssh config file is mounted to sshx pods #2634
  • interface wait script improvements #2635
  • fixed containerlab lab dir config to take precedence over the startup #2642
  • --cleanup will remove the stale lab dir even if no containers for this lab are running #2631
  • quickstart script to support AlmaLinux #2656
  • creating bridges in the namespaces other than the host #2652
  • added mul, div, and rem template functions #2658
  • backup (.bak) files are now stored in the /tmp/.clab/bak/ directory #2661
  • support destroy operation by the name of the lab #2665
  • when inspect is used with --wide, the table output will use a single line per node #2666
  • quick setup script support for Fedora 42+ #2677
  • destroying all labs with --all flag will now prompt a user for confirmation #2667