How do I create a new yaml document

[tomwright]

How do I create a new yaml document

Thanks!

[TomWright]

Are you referring to the JSON content within node.longhorn.io/default-disks-config?

On another note, please use 3 backticks for code highlighting instead of 1. That way new lines etc are displayed properly.

Thanks, I would to create the complete data structure from scratch

[TomWright]

You can use dasel put string with a blank input to create new documents.

E.g.

echo '' | dasel put string -p yaml some.path.here value
some:
  path:
    here: value

You can then pipe that output into another dasel command:

echo '' | dasel put string -p yaml 'some.path.here' value | dasel put string -p yaml 'some.path.too' value2
some:
  path:
    here: value
    too: value2

I just made a release that will allow you to use . in the property name by escaping it. Download dasel v1.5.0 and then the following should work:

echo '' | dasel put string -p yaml 'metadata.annotations.node\.longhorn\.io\/default-disks-config' '[ { "name":"fast",  "path":"/mnt/data-fast1", "allowScheduling":true, "tags":["fast"]}, { "name":"slow",  "path":"/mnt/data-slow1", "allowScheduling":true, "tags":["slow"]} ]' | dasel put string -p yaml 'metadata.annotations.node\.longhorn\.io\/create-default-disk' config

If you want to save this file just add > myfile.yaml at the end of the command.

I've just ran this locally with v1.5.0:

echo '' | dasel put string -p yaml 'metadata.annotations.node\.longhorn\.io\/default-disks-config' '[ { "name":"fast",  "path":"/mnt/data-fast1", "allowScheduling":true, "tags":["fast"]}, { "name":"slow",  "path":"/mnt/data-slow1", "allowScheduling":true, "tags":["slow"]} ]' | dasel put string -p yaml 'metadata.annotations.node\.longhorn\.io\/create-default-disk' config
metadata:
  annotations:
    node.longhorn.io/create-default-disk: config
    node.longhorn.io/default-disks-config: '[ { "name":"fast",  "path":"/mnt/data-fast1",
      "allowScheduling":true, "tags":["fast"]}, { "name":"slow",  "path":"/mnt/data-slow1",
      "allowScheduling":true, "tags":["slow"]} ]'

Hi @TomWright,

Thanks, looking good. One question, this part:

            "    node.longhorn.io/default-disks-config: '[ { \"name\":\"fast\",  \"path\":\"/mnt/data-fast1\", \"allowScheduling\":true, \"tags\":[\"fast\"]}, { \"name\":\"slow\",  \"path\":\"/mnt/data-slow1\", \"allowScheduling\":true, \"tags\":[\"slow\"]} ]'" \

Is it possible to create this as an array? As far as I understand it, this part is an array and I do need 1 to x entries in this part, depending on the number of disks.

Thanks!

[TomWright]

Just append [] to the selector you want to be an array.
https://github.com/TomWright/dasel#next-available-index

Hi @TomWright ,

Thanks, I really appreciate the help you are giving, could you give me an example how to create this with an array?

metadata:
  annotations:
    node.longhorn.io/create-default-disk: config
    node.longhorn.io/default-disks-config: '[ { "name":"fast",  "path":"/mnt/data-fast1",
      "allowScheduling":true, "tags":["fast"]}, { "name":"slow",  "path":"/mnt/data-slow1",
      "allowScheduling":true, "tags":["slow"]} ]'

The part of the disks-config is what I am looking for.

Thanks again

[TomWright]

Those values are in a JSON string. Do you want them as JSON or as YAML?

Hi @TomWright ,

That should be JSON, thanks.

[TomWright]

echo '' | dasel put string -p yaml 'metadata.annotations.node\.longhorn\.io\/default-disks-config.[]' '[ { "name":"fast",  "path":"/mnt/data-fast1", "allowScheduling":true, "tags":["fast"]}, { "name":"slow",  "path":"/mnt/data-slow1", "allowScheduling":true, "tags":["slow"]} ]' | dasel put string -p yaml 'metadata.annotations.node\.longhorn\.io\/create-default-disk' config

Hi @TomWright ,

Could you please take a look at this again?

I am trying to use your example, but it is different from my example. In your example config (last line) is also on metadata.annotation, but in my question it is on metadata.labels. When I replace the word annotation with labels it is not working, also not when I am splitting it into 2 commands.

This is not giving the line with the labels:

echo '' | dasel put string -p yaml 'metadata.annotations.node\.longhorn\.io\/default-disks-config' '[ { "name":"fast",  "path":"/mnt/data-fast1", "allowScheduling":true, "tags":["fast"]}, { "name":"slow",  "path":"/mnt/data-slow1", "allowScheduling":true, "tags":["slow"]} ]' | dasel put string -p yaml 'metadata.labels.node\.longhorn\.io\/create-default-disk' config

Also splitting it into 2 parts doesn't work:

longhorn_disk_annotation=$(echo '' | dasel put string -p yaml 'metadata.annotations.node\.longhorn\.io\/default-disks-config' '[ { "name":"fast",  "path":"/mnt/data-fast1", "allowScheduling":true, "tags":["fast"]}, { "name":"slow",  "path":"/mnt/data-slow1", "allowScheduling":true, "tags":["slow"]} ]')
result=$(echo "$longhorn_disk_annotation" | dasel put string -p yaml 'metadata.labels.node\.longhorn\.io\/create-default-disk' config)

How can I get this working?

[TomWright]

What is the final output you want to see?

This :-)

metadata:
  annotations:
    node.longhorn.io/default-disks-config: '[ { "name":"fast",  "path":"/mnt/data-fast1", "allowScheduling":true, "tags":["fast"]}, { "name":"slow",  "path":"/mnt/data-slow1", "allowScheduling":true, "tags":["slow"]} ]'
  labels:
    node.longhorn.io/create-default-disk: config

Hello @TomWright,

I have tried it with variables and with files, the second put string is not working. Is this a bug or am I doing something wrong?

[TomWright]

I'll take a look at this today and get back to you

Great, thanks!

[TomWright]

Hey @ws-way, this looks like a bug.

I'm debugging it now and will release a fix ASAP. Thanks for your patience 👍

Ok, thanks, good luck with the fix

[TomWright]

OK the issue is fixed as of v1.5.1.

echo '' | dasel put string -p yaml 'metadata.annotations.node\.longhorn\.io\/default-disks-config' '[ { "name":"fast",  "path":"/mnt/data-fast1", "allowScheduling":true, "tags":["fast"]}, { "name":"slow",  "path":"/mnt/data-slow1", "allowScheduling":true, "tags":["slow"]} ]' | dasel put string -p yaml 'metadata.labels.node\.longhorn\.io\/create-default-disk' 'config'

Output is:

metadata:
  annotations:
    node.longhorn.io/default-disks-config: '[ { "name":"fast",  "path":"/mnt/data-fast1",
      "allowScheduling":true, "tags":["fast"]}, { "name":"slow",  "path":"/mnt/data-slow1",
      "allowScheduling":true, "tags":["slow"]} ]'
  labels:
    node.longhorn.io/create-default-disk: config

Looks it is working, thanks again!