curl --request POST \
--url https://storage.{region}.basaltic.sh/v1/volumes/{volume_id}/extend \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"new_size_gb": 200
}
'import requests
url = "https://storage.{region}.basaltic.sh/v1/volumes/{volume_id}/extend"
payload = { "new_size_gb": 200 }
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({new_size_gb: 200})
};
fetch('https://storage.{region}.basaltic.sh/v1/volumes/{volume_id}/extend', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://storage.{region}.basaltic.sh/v1/volumes/{volume_id}/extend",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'new_size_gb' => 200
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://storage.{region}.basaltic.sh/v1/volumes/{volume_id}/extend"
payload := strings.NewReader("{\n \"new_size_gb\": 200\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Authorization", "Bearer <token>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://storage.{region}.basaltic.sh/v1/volumes/{volume_id}/extend")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"new_size_gb\": 200\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://storage.{region}.basaltic.sh/v1/volumes/{volume_id}/extend")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"new_size_gb\": 200\n}"
response = http.request(request)
puts response.read_body{
"volume": {
"id": "5f8d2c1a-9b3e-4d7a-8c6f-1e2a3b4c5d6e",
"crn": "crn:storage:sa-saopaulo-1:my-account:volume/data-volume-01",
"name": "data-vol-01",
"tags": {
"environment": "production",
"team": "backend"
},
"volume_type": "ssd",
"size_gb": 100,
"performance": {
"requested": {
"iops": 3000,
"bytes_per_sec": 131072000,
"burst_iops": 0,
"burst_bytes_per_sec": 0,
"burst_seconds": 0
},
"applied": {
"iops": 3000,
"bytes_per_sec": 131072000,
"burst_iops": 0,
"burst_bytes_per_sec": 0,
"burst_seconds": 0
}
},
"included_io_limits": {
"iops": 3000,
"bytes_per_sec": 131072000,
"burst_iops": 0,
"burst_bytes_per_sec": 0,
"burst_seconds": 0
},
"status": "available",
"bootable": false,
"faults": [
{
"code": "BACKUP_FAILED",
"severity": "error",
"message": "Backup upload failed.",
"details": {},
"first_at": "2023-11-07T05:31:56Z",
"last_at": "2023-11-07T05:31:56Z",
"occurrences": 1
}
],
"created_at": "2026-01-15T09:30:00Z",
"updated_at": "2026-01-15T09:31:12Z",
"source_image": {
"id": "550e8400-e29b-41d4-a716-446655440004",
"crn": "crn:compute:sa-saopaulo-1:platform:image/ubuntu/architecture/amd64/version/24.04",
"name": "ubuntu"
},
"source_snapshot": {
"id": "550e8400-e29b-41d4-a716-446655440011",
"crn": "crn:storage:sa-saopaulo-1:my-account:volume/data/snapshot/nightly",
"name": "nightly"
},
"description": "Primary data volume for app-01"
}
}{
"error": {
"code": "INVALID_INPUT",
"message": "Invalid request parameters",
"request_id": "550e8400-e29b-41d4-a716-446655440000"
}
}{
"error": {
"code": "UNAUTHORIZED",
"message": "Authentication required",
"request_id": "550e8400-e29b-41d4-a716-446655440000"
}
}{
"error": {
"code": "ACCESS_DENIED",
"message": "You don't have permission to perform this action",
"request_id": "550e8400-e29b-41d4-a716-446655440000"
}
}{
"error": {
"code": "NOT_FOUND",
"message": "Resource not found",
"request_id": "550e8400-e29b-41d4-a716-446655440000"
}
}{
"error": {
"code": "INVALID_INPUT",
"message": "Invalid request parameters",
"request_id": "550e8400-e29b-41d4-a716-446655440000",
"params": {
"instances": 2,
"pools": 0
}
}
}{
"error": {
"code": "IDEMPOTENCY_KEY_REUSED",
"message": "This Idempotency-Key was already used with a different request payload",
"request_id": "550e8400-e29b-41d4-a716-446655440000"
}
}{
"error": {
"code": "INTERNAL_ERROR",
"message": "An internal error occurred",
"request_id": "550e8400-e29b-41d4-a716-446655440000"
}
}Extend volume
Grow a volume in available or in_use, including an attached boot
volume. The request returns extending; poll GET until the volume
returns to available (detached) or in_use (attached) at the new size.
Attached devices are refreshed before completion, with the instance
running or stopped. Resize and refresh failures retry while the volume
remains protected in extending.
The new size must be larger than the current size and at most 16384 GB.
The customer must grow the guest partition and filesystem separately.
curl --request POST \
--url https://storage.{region}.basaltic.sh/v1/volumes/{volume_id}/extend \
--header 'Authorization: Bearer <token>' \
--header 'Content-Type: application/json' \
--data '
{
"new_size_gb": 200
}
'import requests
url = "https://storage.{region}.basaltic.sh/v1/volumes/{volume_id}/extend"
payload = { "new_size_gb": 200 }
headers = {
"Authorization": "Bearer <token>",
"Content-Type": "application/json"
}
response = requests.post(url, json=payload, headers=headers)
print(response.text)const options = {
method: 'POST',
headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
body: JSON.stringify({new_size_gb: 200})
};
fetch('https://storage.{region}.basaltic.sh/v1/volumes/{volume_id}/extend', options)
.then(res => res.json())
.then(res => console.log(res))
.catch(err => console.error(err));<?php
$curl = curl_init();
curl_setopt_array($curl, [
CURLOPT_URL => "https://storage.{region}.basaltic.sh/v1/volumes/{volume_id}/extend",
CURLOPT_RETURNTRANSFER => true,
CURLOPT_ENCODING => "",
CURLOPT_MAXREDIRS => 10,
CURLOPT_TIMEOUT => 30,
CURLOPT_HTTP_VERSION => CURL_HTTP_VERSION_1_1,
CURLOPT_CUSTOMREQUEST => "POST",
CURLOPT_POSTFIELDS => json_encode([
'new_size_gb' => 200
]),
CURLOPT_HTTPHEADER => [
"Authorization: Bearer <token>",
"Content-Type: application/json"
],
]);
$response = curl_exec($curl);
$err = curl_error($curl);
curl_close($curl);
if ($err) {
echo "cURL Error #:" . $err;
} else {
echo $response;
}package main
import (
"fmt"
"strings"
"net/http"
"io"
)
func main() {
url := "https://storage.{region}.basaltic.sh/v1/volumes/{volume_id}/extend"
payload := strings.NewReader("{\n \"new_size_gb\": 200\n}")
req, _ := http.NewRequest("POST", url, payload)
req.Header.Add("Authorization", "Bearer <token>")
req.Header.Add("Content-Type", "application/json")
res, _ := http.DefaultClient.Do(req)
defer res.Body.Close()
body, _ := io.ReadAll(res.Body)
fmt.Println(string(body))
}HttpResponse<String> response = Unirest.post("https://storage.{region}.basaltic.sh/v1/volumes/{volume_id}/extend")
.header("Authorization", "Bearer <token>")
.header("Content-Type", "application/json")
.body("{\n \"new_size_gb\": 200\n}")
.asString();require 'uri'
require 'net/http'
url = URI("https://storage.{region}.basaltic.sh/v1/volumes/{volume_id}/extend")
http = Net::HTTP.new(url.host, url.port)
http.use_ssl = true
request = Net::HTTP::Post.new(url)
request["Authorization"] = 'Bearer <token>'
request["Content-Type"] = 'application/json'
request.body = "{\n \"new_size_gb\": 200\n}"
response = http.request(request)
puts response.read_body{
"volume": {
"id": "5f8d2c1a-9b3e-4d7a-8c6f-1e2a3b4c5d6e",
"crn": "crn:storage:sa-saopaulo-1:my-account:volume/data-volume-01",
"name": "data-vol-01",
"tags": {
"environment": "production",
"team": "backend"
},
"volume_type": "ssd",
"size_gb": 100,
"performance": {
"requested": {
"iops": 3000,
"bytes_per_sec": 131072000,
"burst_iops": 0,
"burst_bytes_per_sec": 0,
"burst_seconds": 0
},
"applied": {
"iops": 3000,
"bytes_per_sec": 131072000,
"burst_iops": 0,
"burst_bytes_per_sec": 0,
"burst_seconds": 0
}
},
"included_io_limits": {
"iops": 3000,
"bytes_per_sec": 131072000,
"burst_iops": 0,
"burst_bytes_per_sec": 0,
"burst_seconds": 0
},
"status": "available",
"bootable": false,
"faults": [
{
"code": "BACKUP_FAILED",
"severity": "error",
"message": "Backup upload failed.",
"details": {},
"first_at": "2023-11-07T05:31:56Z",
"last_at": "2023-11-07T05:31:56Z",
"occurrences": 1
}
],
"created_at": "2026-01-15T09:30:00Z",
"updated_at": "2026-01-15T09:31:12Z",
"source_image": {
"id": "550e8400-e29b-41d4-a716-446655440004",
"crn": "crn:compute:sa-saopaulo-1:platform:image/ubuntu/architecture/amd64/version/24.04",
"name": "ubuntu"
},
"source_snapshot": {
"id": "550e8400-e29b-41d4-a716-446655440011",
"crn": "crn:storage:sa-saopaulo-1:my-account:volume/data/snapshot/nightly",
"name": "nightly"
},
"description": "Primary data volume for app-01"
}
}{
"error": {
"code": "INVALID_INPUT",
"message": "Invalid request parameters",
"request_id": "550e8400-e29b-41d4-a716-446655440000"
}
}{
"error": {
"code": "UNAUTHORIZED",
"message": "Authentication required",
"request_id": "550e8400-e29b-41d4-a716-446655440000"
}
}{
"error": {
"code": "ACCESS_DENIED",
"message": "You don't have permission to perform this action",
"request_id": "550e8400-e29b-41d4-a716-446655440000"
}
}{
"error": {
"code": "NOT_FOUND",
"message": "Resource not found",
"request_id": "550e8400-e29b-41d4-a716-446655440000"
}
}{
"error": {
"code": "INVALID_INPUT",
"message": "Invalid request parameters",
"request_id": "550e8400-e29b-41d4-a716-446655440000",
"params": {
"instances": 2,
"pools": 0
}
}
}{
"error": {
"code": "IDEMPOTENCY_KEY_REUSED",
"message": "This Idempotency-Key was already used with a different request payload",
"request_id": "550e8400-e29b-41d4-a716-446655440000"
}
}{
"error": {
"code": "INTERNAL_ERROR",
"message": "An internal error occurred",
"request_id": "550e8400-e29b-41d4-a716-446655440000"
}
}storage:ExtendVolume. See STORAGE permissions for the full list, what each one covers, and an example policy.Authorizations
An OAuth 2.0 bearer token, sent as Authorization: Bearer <token>.
This is the recommended way to authenticate.
Get one by exchanging a service account's access key pair at
POST /v1/oauth/token with grant_type=client_credentials. It is the
standard client-credentials grant, so any OAuth-aware library will
obtain and refresh it for you.
curl -s -u "$KEY_ID:$SECRET" -d grant_type=client_credentials \ https://iam.basaltic.sh/v1/oauth/token
Tokens last an hour by default. The same access key pair is separately your AWS SigV4 credential for the S3-compatible object endpoint, which speaks nothing else.
Headers
Optional client-generated key that makes a create replay-safe. Retrying a request with the same key returns the original outcome verbatim instead of creating a duplicate resource. Reusing a key with a different request body is rejected (422); a request whose key is still being processed returns 409. Records are honored for 24 hours. Use a UUID or similarly unique token.
255Path Parameters
Volume ID
Body
New size in GB. Must be strictly greater than the current size.
1 <= x <= 16384200
Response
Volume extend accepted (status=extending)
Show child attributes
Show child attributes

