Day: 13 July 2020

Openconfig

I have struggled to get something working for learning a bit of openconfig.

At the end, all info my info comes from Anton’s Karneliuk blog series about Openconfig. So all credit to him. It is the best source about real testing of openconfig in different platforms.

OpenConfig. Part 1. OpenConfig (w/o and w/ Ansible) for Arista EOS, Cisco IOS XR and Nokia SR OS

I am not going to create the wheel and explain what openconfig is. In my head, it is attempt from several big vendors to standardise the network management (config) and monitoring (telemetry) via YANG (vendor-neutral) models. So OC uses YANG. And we interact with OC using a transport protocol like netconf, restcong and gNMI. So the network devices need to implement one of these protocols. Based on the blog Cisco, Nokia and Arista have netconf implementations and Ansible has a module for that!!! So the key words are openconfig, yang and netcong.

So in my case, based on my ceos lab, I have added a new playbook based on Anton’s to test openconfig/netcong with Arista cEOS:

https://github.com/thomarite/ceos-testing/blob/master/README.md#openconfig

This is quite basic as it only gets the interface config.

Following Anton’s Part3 Blog:

OpenConfig. Part 3. Advanced OpenConfig (w/ Ansible) for Arista EOS, Cisco IOS XR and Nokia SR OS: route policy BGP and interfaces again

I tried to push config via openconfig to my ceos devices (all files are in github as per link above).

The blog is dense but it is good because there is a lot of info. In this case, you have to use an Ansible role so it is a new thing to learn. As well, I wanted to adapt that role to my env and found some ansible issues but managed to fix after reading ansible documentation and paying attention to the -vvv info.

From “oc-push-config.yaml” the first task “collect” it is fine. It just takes some 10 minutes or more to get all YANG modules from each device.

The issue is with task “configure”. It fails when trying to push the interface config. I have tried Anton’s config and the actual config generated from oc-get-interface-info.yaml but no joy.

Based on the blog, it seems Arista doesnt have much interest in Openconfig.

Anyway, there have been a couple of intense days looking at all this openconfig/netcong/yang thing. I have just touched the surface but I have learned some Ansible in the way too. So could be worse.

Will move on to something else.

Empanada

Some time ago I watched this video from Paul Hollywood in Madrid. I was amazed! And there was something I had in my to-cook list: Empanada

As a kid I have eaten different types of empanadas, mainly vegetable and meat ones. Although you have find versions with fish (cod) and seafood/octupus. Depends on the region in Spain.

And you can find them in many Latin countries too!

Finally this weekend I gave it a go.

Based on this recipe, I made mine with grilled vegetables.

  • Filling: Grilled Vegetables
    • Pre-Heat oven at 200C
    • Oil a tray.
    • Cut several types of vegetables: onions, courguettes, peppers, potatoes, tomatoes, etc
    • Add some spices: tumeric, paprika, a bit of salt, etc
    • Mix everything with your hand so all ingredients have a bit of oil coatting.
    • Put in the hot oven for 20m at least. Depends on the amount of vegs. At this point you coud start the empanada dough.

  • Empanada Dough Ingredients:
    • You should put the butter and lard (pig’s fat) into the freezer!
    • 200gr plain flour
    • 1/2 tsp salt
    • 125 ml water
    • 65gr butter, frozen and then grated (or finely laminated)
    • 65gr lard, frozen and then grated (or finely laminated)

  • Empanada Process:

1. Oven should be hot from the grilled vegs at 200C

2. Mix the flour and salt. Add water bit a bit until getting a dough. Shouldnt be too sticky. You can knead it a bit.

3. Roll the dough out into a rectangle on a lightly floured work surface. Add half of the butter/lard over the pastry. Fold the dough on top of the butter/lard. Turn, use the roll to mix and repeat again with the rest of the butter/lard. In the video is much easier to see/understand. Repeat the roll and folding two more times so we create the layers in the pastry.

4. Wrap the dough in cling film and leave to rest in the fridge for 30 minutes before using.

5. Take the chilled pastry from the fridge and roll out onto a lightly floured surface. Roll into a rectangle. Just be sure the dough doesn’t break. Brush the edges with beaten egg as this will be the sticking point for the pastry.

6. Add the grilled vegs in half of the dough. Fold the other half to cover the filling. Press the edges to seal. Brush the top with beaten egg

7. Put in the oven at 200C for 25 minutes or so until the pastry is crispy and a golden brown colour.

For being the first time, I was really surprised how crunchy it was! I had a good lunch.

I think you prepare the dough the day before, and as soon the vegs are ready, take it out of the fridge and carry on.

Grating the butter/lard was a bit messy even being frozen. Next time I will slice it very finely. When making croissants, you just flatten the butter.

Anyway, new recipe in my arsenal!