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admin:~ # ceph-volume inventory
 stderr: unable to read label for /dev/vda2: (2) No such file or directory
 stderr: unable to read label for /dev/vda3: (2) No such file or directory
 stderr: unable to read label for /dev/vda1: (2) No such file or directory
 stderr: unable to read label for /dev/vda: (2) No such file or directory
 stderr: unable to read label for /dev/vdb: (2) No such file or directory
 stderr: unable to read label for /dev/vdc: (2) No such file or directory
 stderr: unable to read label for /dev/vdd: (2) No such file or directory
 stderr: unable to read label for /dev/vde: (2) No such file or directory
 stderr: unable to read label for /dev/vdf: (2) No such file or directory

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Proposal:

Make the CLI more `spec` centric.

`ceph orch spec <operation> <--service-type>|<--service-name>`


Examples:

`ceph orch spec ls`

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Workflow examples:

Note: The depicted workflow starts after the initial deployment with bin/cephadm.

Task 0:

Add available hosts to cephadm:

ceph orch host add host{1..20}

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deepsea_drive_group = """
drive_group_default:
  target: 'dc-north'
  data_devices:
    model: SSD-123-foo
  db_devices:
    model: MC-55-44-XZ
  format: bluestore
  encryption: True
---

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inventory:
  version: 1
  # the version of the inventory store structure
  unique_hostname:
    # hostnames need to be unique in a cluster, we can use it as the key with values
    # being the attributes
    attributes:
      # here we store arbitrary information about the host like
      # fqdn, kernel version, os-name etc
      # this opens up the possibility for node inspection (cpu/ram consumption etc)

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specs:
  - spec:
      # service_name, service_type
      key1: val
      key3: val
    # random k-v pairs on a spec level (created_at) would be a candidate
    key1: val
    # versioning
    version: 1

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import json
import pprint
import time
import yaml
from typing import *


def _load_inventory_struct():
    with open('inventory_schema.yaml', 'rb') as _fd:
        return yaml.safe_load(_fd)

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import json
import pprint
import time
import yaml
from typing import *


def _load_inventory_struct():
    with open('inventory_schema.yaml', 'rb') as _fd:
        return yaml.safe_load(_fd)

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# add this to ~/.bashrc | ~/.zshrc
# put this in ~/.tmux.conf
# bind-key W run "tmux split-window -v 'bash -ci ftpane'"
# to enable it

# This does a couple of things
# mod+W opens a tmux split window with a list of existing windows
# selecting an existing one will bring you there. If the window does 
# not exist it will create one with the provided name and switch to it

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-- in a it/describe block you can do this to simulate a side-effect
-- similar to python-unittest's side_effect https://docs.python.org/3/library/unittest.mock.html#unittest.mock.Mock.side_effect

local called = false
local side_effect = function()
  -- adding a side_effect that causes to fail the `request_uri` the first time
  -- but succeed the second time.
  if not called then
    called = true
    return false, "err"