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Added support for increased Block Storage Volume limits #626

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Added support for increased Block Storage Volume limits #626

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fb04f1b
Support increased block storage volume limits
ezilber-akamai Dec 2, 2025
6a2bba7
Fixed lint
ezilber-akamai Dec 2, 2025
fefbffe
Merge branch 'proj/block-storage-volume-limit-increase' into TPT-4040…
ezilber-akamai Dec 3, 2025
0c9466b
Address CoPilot suggestions
ezilber-akamai Dec 3, 2025
c956b1c
Address more Copilot suggestions
ezilber-akamai Dec 3, 2025
d9a8998
Fix lint
ezilber-akamai Dec 3, 2025
c2a7f6a
Addressed PR comments
ezilber-akamai Dec 5, 2025
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17 changes: 15 additions & 2 deletions linode_api4/objects/linode.py
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Original file line number Diff line number Diff line change
Expand Up @@ -39,9 +39,12 @@
from linode_api4.objects.serializable import JSONObject, StrEnum
from linode_api4.objects.vpc import VPC, VPCSubnet
from linode_api4.paginated_list import PaginatedList
from linode_api4.util import drop_null_keys
from linode_api4.util import drop_null_keys, generate_device_suffixes

PASSWORD_CHARS = string.ascii_letters + string.digits + string.punctuation
MIN_DEVICE_LIMIT = 8
MB_PER_GB = 1024
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@zliang-akamai zliang-akamai Dec 7, 2025

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Did we confirm how Linode back-end calculate this? There are two styles, 1GB = 1000 MB and 1GB = 1024 MB

MAX_DEVICE_LIMIT = 64


class InstanceDiskEncryptionType(StrEnum):
Expand Down Expand Up @@ -1258,9 +1261,19 @@ def config_create(
from .volume import Volume # pylint: disable=import-outside-toplevel

hypervisor_prefix = "sd" if self.hypervisor == "kvm" else "xvd"

device_limit = int(
max(
MIN_DEVICE_LIMIT,
min(self.specs.memory // MB_PER_GB, MAX_DEVICE_LIMIT),
)
)

device_names = [
hypervisor_prefix + string.ascii_lowercase[i] for i in range(0, 8)
hypervisor_prefix + suffix
for suffix in generate_device_suffixes(device_limit)
]

device_map = {
device_names[i]: None for i in range(0, len(device_names))
}
Expand Down
26 changes: 26 additions & 0 deletions linode_api4/util.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2,6 +2,7 @@
Contains various utility functions.
"""

import string
from typing import Any, Dict


Expand All @@ -27,3 +28,28 @@ def recursive_helper(value: Any) -> Any:
return value

return recursive_helper(data)


def generate_device_suffixes(n: int) -> list[str]:
"""
Generate n alphabetical suffixes starting with a, b, c, etc.
After z, continue with aa, ab, ac, etc. followed by aaa, aab, etc.
Example:
generate_device_suffixes(30) ->
['a', 'b', 'c', ..., 'z', 'aa', 'ab', 'ac', 'ad']
"""
letters = string.ascii_lowercase
result = []
i = 0

while len(result) < n:
s = ""
x = i
while True:
s = letters[x % 26] + s
x = x // 26 - 1
if x < 0:
break
result.append(s)
i += 1
return result
Comment on lines +33 to +55
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@zliang-akamai zliang-akamai Dec 7, 2025 •
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Just an idea (optional), would it be better if we write this into a Python generator that yields one item every time?

121 changes: 120 additions & 1 deletion test/unit/util_test.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
import unittest

from linode_api4.util import drop_null_keys
from linode_api4.util import drop_null_keys, generate_device_suffixes


class UtilTest(unittest.TestCase):
Expand Down Expand Up @@ -53,3 +53,122 @@ def test_drop_null_keys_recursive(self):
}

assert drop_null_keys(value) == expected_output

def test_generate_device_suffixes(self):
"""
Tests whether generate_device_suffixes works as expected.
"""

expected_output_12 = [
"a",
"b",
"c",
"d",
"e",
"f",
"g",
"h",
"i",
"j",
"k",
"l",
]
assert generate_device_suffixes(12) == expected_output_12

expected_output_30 = [
"a",
"b",
"c",
"d",
"e",
"f",
"g",
"h",
"i",
"j",
"k",
"l",
"m",
"n",
"o",
"p",
"q",
"r",
"s",
"t",
"u",
"v",
"w",
"x",
"y",
"z",
"aa",
"ab",
"ac",
"ad",
]
assert generate_device_suffixes(30) == expected_output_30

expected_output_60 = [
"a",
"b",
"c",
"d",
"e",
"f",
"g",
"h",
"i",
"j",
"k",
"l",
"m",
"n",
"o",
"p",
"q",
"r",
"s",
"t",
"u",
"v",
"w",
"x",
"y",
"z",
"aa",
"ab",
"ac",
"ad",
"ae",
"af",
"ag",
"ah",
"ai",
"aj",
"ak",
"al",
"am",
"an",
"ao",
"ap",
"aq",
"ar",
"as",
"at",
"au",
"av",
"aw",
"ax",
"ay",
"az",
"ba",
"bb",
"bc",
"bd",
"be",
"bf",
"bg",
"bh",
]
assert generate_device_suffixes(60) == expected_output_60
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