Reinstall a VPS

Deferred Asynchronous · 202

POST /api/v1/servers/{vmid}/rebuild

operationIdpostServerRebuild

Required level: Full
Rate limit: heavy operations, 6 calls per hour per VPS (60 per account)

Reinstalls the operating system. All disk content is destroyed (files, configuration, accounts), with no way back: anything not in a backup or a snapshot is lost.

The os / variant pair is taken as is from GET /catalog/os-templates. The VPS memory is compared with the template's minimum before any action: a reinstallation that would leave a machine unable to boot is rejected with 409.

Passwords are generated, not chosen, and returned only once in this response: root_password always, plus app_password for an application variant (variant other than default). They take effect when the reinstalled system starts.

ssh_key_ids replaces the keys to install on the rebuilt machine. An identifier that does not belong to the account installs nothing. A weak key is refused (400), before any action.

This request is processed in the background: it answers immediately while the work continues. Follow it with the task or request endpoints.

Path parameters

vmid string required: Identifier of the VPS. It must belong to the account and be within the key's scope.

pattern ^\d+$ Example: 116807

Request body

application/json

os string

os field of an entry from GET /catalog/os-templates

Example: debian-12

required
variant string

variant field of the same entry

optional
ssh_key_ids string[]

Account keys to install. Missing or empty: this call leaves keys untouched.

optional

Example request

{
  "os": "debian-12",
  "variant": "default",
  "ssh_key_ids": [
    "45"
  ]
}

Responses

202

Reinstallation queued; passwords returned only once

The request was accepted, not completed. The response carries a task to follow.

{
  "data": {
    "tasks": [
      {
        "id": "tsk_000002e1",
        "status": "pending",
        "action": "server.rebuild",
        "vmid": "116807",
        "description": "Réinstallation du serveur VPS-116807 avec le template Debian 12",
        "created_at": "2026-08-20T14:31:02+02:00",
        "finished_at": null
      }
    ],
    "root_password": "shfKvbnERTUP2345",
    "effective_after_reboot": true
  }
}

Response fields 12

data object
tasks object[]
id string

Opaque identifier

Example: tsk_000002e1
status string

unknown would indicate a state the API cannot name

one of: pending, succeeded, failed, unknown
action string

Type of task

one of: server.start, server.stop, server.shutdown, server.reboot, server.reset, server.rebuild, server.enable_rescue, server.disable_rescue, server.reboot_rescue, snapshot.create, snapshot.delete, snapshot.rollback, backup.create, backup.restore, iso.mount, iso.unmount, firewall.sync, firewall.unblock_port_25 TaskAction
vmid string
description string
created_at string (date-time)
finished_at string (date-time)

null while the task is running
root_password string

Generated root password, returned only once
app_password string

Application password, for a variant other than default
effective_after_reboot boolean

one of: 1

400

Invalid parameters: validation_failed — os missing, or os / variant pair not in the catalog; validation_failed — key in ssh_key_ids flagged weak.

os missing, or os / variant pair not in the catalog

{
  "type": "https://docs.lws.fr/kvm/errors/validation-failed",
  "title": "Paramètres invalides",
  "status": 400,
  "code": "validation_failed",
  "detail": "Aucun système ne correspond à ce couple os / variant.",
  "request_id": "3f9a1c07b2e45d18",
  "errors": {
    "os": "Reprenez un couple os / variant de /catalog/os-templates."
  }
}

key in ssh_key_ids flagged weak

{
  "type": "https://docs.lws.fr/kvm/errors/validation-failed",
  "title": "Paramètres invalides",
  "status": 400,
  "code": "validation_failed",
  "detail": "La clé SSH 45 ne respecte plus les critères actuels (type reconnu, RSA d'au moins 2048 bits) : elle ne peut pas être posée à la réinstallation.",
  "request_id": "3f9a1c07b2e45d18",
  "errors": {
    "ssh_key_ids": "Retirez la clé 45, ou remplacez-la par une clé conforme."
  }
}

Response fields 18

type string (uri)

Example: https://docs.lws.fr/kvm/errors/vm-not-found

required
title string

Short title, in French

Example: VPS introuvable

required
status integer (int64)

HTTP status

Example: 404

required
code string

Stable machine-readable code (see "Errors" in Getting started)

Example: vm_not_found

required
detail string

Detailed message, in French

Example: Aucun VPS 999999 sur ce compte.

required
request_id string

Identifier of the request, to give to support

Example: 3f9a1c07b2e45d18

required
errors object

validation_failed: message per faulty parameter
required_level string

insufficient_scope: level required by the operation

one of: read, exploitation, full
task_id string

task_already_running: task running on this VPS

Example: tsk_000002d5
family string

rate_limited: exhausted rate limit family

one of: read, mutation, heavy
limit integer (int64)

rate_limited: hourly limit of the family
retry_after integer (int64)

rate_limited: seconds to wait
lock string

server_locked: lock set by the hypervisor (backup, snapshot, suspended…)

Example: snapshot
reason string

server_locked: operation_in_progress, an operation is running, retry after Retry-After; suspended, the VPS is hibernating, start it first; support_notified, abnormal lock, the LWS team has been notified and is taking care of it

one of: operation_in_progress, suspended, support_notified
maintenance object

server_maintenance: nature of the intervention, start and expected end (null for an incident)
kind string

one of: works, incident
started_at string (date-time)
expected_end string (date-time)

401

Authentication refused: invalid_token — Authorization header missing or malformed, or unknown key; access_disabled — API access turned off for this account, or API service temporarily turned off by LWS.

Authorization header missing or malformed, or unknown key

{
  "type": "https://docs.lws.fr/kvm/errors/invalid-token",
  "title": "Authentification invalide",
  "status": 401,
  "code": "invalid_token",
  "detail": "Clé inconnue ou révoquée.",
  "request_id": "3f9a1c07b2e45d18"
}

API access turned off for this account, or API service temporarily turned off by LWS

{
  "type": "https://docs.lws.fr/kvm/errors/access-disabled",
  "title": "Accès API désactivé",
  "status": 401,
  "code": "access_disabled",
  "detail": "L'accès API est désactivé pour ce compte. Réactivez-le depuis la page « API / MCP » du panel.",
  "request_id": "3f9a1c07b2e45d18"
}

Response fields 18

type string (uri)

Example: https://docs.lws.fr/kvm/errors/vm-not-found

required
title string

Short title, in French

Example: VPS introuvable

required
status integer (int64)

HTTP status

Example: 404

required
code string

Stable machine-readable code (see "Errors" in Getting started)

Example: vm_not_found

required
detail string

Detailed message, in French

Example: Aucun VPS 999999 sur ce compte.

required
request_id string

Identifier of the request, to give to support

Example: 3f9a1c07b2e45d18

required
errors object

validation_failed: message per faulty parameter
required_level string

insufficient_scope: level required by the operation

one of: read, exploitation, full
task_id string

task_already_running: task running on this VPS

Example: tsk_000002d5
family string

rate_limited: exhausted rate limit family

one of: read, mutation, heavy
limit integer (int64)

rate_limited: hourly limit of the family
retry_after integer (int64)

rate_limited: seconds to wait
lock string

server_locked: lock set by the hypervisor (backup, snapshot, suspended…)

Example: snapshot
reason string

server_locked: operation_in_progress, an operation is running, retry after Retry-After; suspended, the VPS is hibernating, start it first; support_notified, abnormal lock, the LWS team has been notified and is taking care of it

one of: operation_in_progress, suspended, support_notified
maintenance object

server_maintenance: nature of the intervention, start and expected end (null for an incident)
kind string

one of: works, incident
started_at string (date-time)
expected_end string (date-time)

403

Access denied: insufficient_scope — key level too low; ip_not_allowed — calling address not authorized.

key level too low

{
  "type": "https://docs.lws.fr/kvm/errors/insufficient-scope",
  "title": "Droits insuffisants",
  "status": 403,
  "code": "insufficient_scope",
  "detail": "Niveau de permission « full » requis.",
  "request_id": "3f9a1c07b2e45d18",
  "required_level": "full"
}

calling address not authorized

{
  "type": "https://docs.lws.fr/kvm/errors/ip-not-allowed",
  "title": "Adresse non autorisée",
  "status": 403,
  "code": "ip_not_allowed",
  "detail": "L'adresse 203.0.113.10 ne figure pas parmi les adresses autorisées de ce compte.",
  "request_id": "3f9a1c07b2e45d18"
}

Response fields 18

type string (uri)

Example: https://docs.lws.fr/kvm/errors/vm-not-found

required
title string

Short title, in French

Example: VPS introuvable

required
status integer (int64)

HTTP status

Example: 404

required
code string

Stable machine-readable code (see "Errors" in Getting started)

Example: vm_not_found

required
detail string

Detailed message, in French

Example: Aucun VPS 999999 sur ce compte.

required
request_id string

Identifier of the request, to give to support

Example: 3f9a1c07b2e45d18

required
errors object

validation_failed: message per faulty parameter
required_level string

insufficient_scope: level required by the operation

one of: read, exploitation, full
task_id string

task_already_running: task running on this VPS

Example: tsk_000002d5
family string

rate_limited: exhausted rate limit family

one of: read, mutation, heavy
limit integer (int64)

rate_limited: hourly limit of the family
retry_after integer (int64)

rate_limited: seconds to wait
lock string

server_locked: lock set by the hypervisor (backup, snapshot, suspended…)

Example: snapshot
reason string

server_locked: operation_in_progress, an operation is running, retry after Retry-After; suspended, the VPS is hibernating, start it first; support_notified, abnormal lock, the LWS team has been notified and is taking care of it

one of: operation_in_progress, suspended, support_notified
maintenance object

server_maintenance: nature of the intervention, start and expected end (null for an incident)
kind string

one of: works, incident
started_at string (date-time)
expected_end string (date-time)

404

Resource not found: vm_not_found — VPS does not exist or is outside the key's scope.

{
  "type": "https://docs.lws.fr/kvm/errors/vm-not-found",
  "title": "VPS introuvable",
  "status": 404,
  "code": "vm_not_found",
  "detail": "Aucun VPS 999999 sur ce compte.",
  "request_id": "3f9a1c07b2e45d18"
}

Response fields 18

type string (uri)

Example: https://docs.lws.fr/kvm/errors/vm-not-found

required
title string

Short title, in French

Example: VPS introuvable

required
status integer (int64)

HTTP status

Example: 404

required
code string

Stable machine-readable code (see "Errors" in Getting started)

Example: vm_not_found

required
detail string

Detailed message, in French

Example: Aucun VPS 999999 sur ce compte.

required
request_id string

Identifier of the request, to give to support

Example: 3f9a1c07b2e45d18

required
errors object

validation_failed: message per faulty parameter
required_level string

insufficient_scope: level required by the operation

one of: read, exploitation, full
task_id string

task_already_running: task running on this VPS

Example: tsk_000002d5
family string

rate_limited: exhausted rate limit family

one of: read, mutation, heavy
limit integer (int64)

rate_limited: hourly limit of the family
retry_after integer (int64)

rate_limited: seconds to wait
lock string

server_locked: lock set by the hypervisor (backup, snapshot, suspended…)

Example: snapshot
reason string

server_locked: operation_in_progress, an operation is running, retry after Retry-After; suspended, the VPS is hibernating, start it first; support_notified, abnormal lock, the LWS team has been notified and is taking care of it

one of: operation_in_progress, suspended, support_notified
maintenance object

server_maintenance: nature of the intervention, start and expected end (null for an incident)
kind string

one of: works, incident
started_at string (date-time)
expected_end string (date-time)

409

Conflict with the current state: invalid_state — VPS memory below the system's minimum, or VPS missing from its hypervisor's database; task_already_running — a reinstallation is already running; service_suspended — VPS disabled or expired: only read operations remain possible; server_locked — VPS locked by the hypervisor, see reason; with operation_in_progress, Retry-After gives the recommended wait.

VPS memory below the system's minimum, or VPS missing from its hypervisor's database

{
  "type": "https://docs.lws.fr/kvm/errors/invalid-state",
  "title": "Opération impossible en l'état",
  "status": 409,
  "code": "invalid_state",
  "detail": "Ce système demande au moins 7 Go de mémoire ; ce VPS en dispose de 4.",
  "request_id": "3f9a1c07b2e45d18"
}

a reinstallation is already running

{
  "type": "https://docs.lws.fr/kvm/errors/task-already-running",
  "title": "Opération déjà en cours",
  "status": 409,
  "code": "task_already_running",
  "detail": "Une réinstallation est déjà en cours sur ce VPS. Attendez qu'elle aboutisse.",
  "request_id": "3f9a1c07b2e45d18",
  "task_id": "tsk_000002d5"
}

VPS disabled or expired: only read operations remain possible

{
  "type": "https://docs.lws.fr/kvm/errors/service-suspended",
  "title": "Service suspendu",
  "status": 409,
  "code": "service_suspended",
  "detail": "Le VPS 116807 est expiré.",
  "request_id": "3f9a1c07b2e45d18"
}

VPS locked by the hypervisor, see reason; with operation_in_progress, Retry-After gives the recommended wait

{
  "type": "https://docs.lws.fr/kvm/errors/server-locked",
  "title": "Serveur verrouillé",
  "status": 409,
  "code": "server_locked",
  "detail": "Action impossible pour le moment : une sauvegarde est en cours sur le serveur. Réessayez dans quelques minutes.",
  "request_id": "3f9a1c07b2e45d18",
  "lock": "snapshot",
  "reason": "operation_in_progress"
}

Response fields 18

type string (uri)

Example: https://docs.lws.fr/kvm/errors/vm-not-found

required
title string

Short title, in French

Example: VPS introuvable

required
status integer (int64)

HTTP status

Example: 404

required
code string

Stable machine-readable code (see "Errors" in Getting started)

Example: vm_not_found

required
detail string

Detailed message, in French

Example: Aucun VPS 999999 sur ce compte.

required
request_id string

Identifier of the request, to give to support

Example: 3f9a1c07b2e45d18

required
errors object

validation_failed: message per faulty parameter
required_level string

insufficient_scope: level required by the operation

one of: read, exploitation, full
task_id string

task_already_running: task running on this VPS

Example: tsk_000002d5
family string

rate_limited: exhausted rate limit family

one of: read, mutation, heavy
limit integer (int64)

rate_limited: hourly limit of the family
retry_after integer (int64)

rate_limited: seconds to wait
lock string

server_locked: lock set by the hypervisor (backup, snapshot, suspended…)

Example: snapshot
reason string

server_locked: operation_in_progress, an operation is running, retry after Retry-After; suspended, the VPS is hibernating, start it first; support_notified, abnormal lock, the LWS team has been notified and is taking care of it

one of: operation_in_progress, suspended, support_notified
maintenance object

server_maintenance: nature of the intervention, start and expected end (null for an incident)
kind string

one of: works, incident
started_at string (date-time)
expected_end string (date-time)

429

Rate limit exceeded: rate_limited — hourly limit of the family exhausted.

{
  "type": "https://docs.lws.fr/kvm/errors/rate-limited",
  "title": "Quota dépassé",
  "status": 429,
  "code": "rate_limited",
  "detail": "Quota dépassé pour les opérations de type « heavy » sur le VPS 116807 : 6 appels par heure. Réessayez dans 214 seconde(s).",
  "request_id": "3f9a1c07b2e45d18",
  "family": "heavy",
  "limit": 6,
  "retry_after": 214
}

Response fields 18

type string (uri)

Example: https://docs.lws.fr/kvm/errors/vm-not-found

required
title string

Short title, in French

Example: VPS introuvable

required
status integer (int64)

HTTP status

Example: 404

required
code string

Stable machine-readable code (see "Errors" in Getting started)

Example: vm_not_found

required
detail string

Detailed message, in French

Example: Aucun VPS 999999 sur ce compte.

required
request_id string

Identifier of the request, to give to support

Example: 3f9a1c07b2e45d18

required
errors object

validation_failed: message per faulty parameter
required_level string

insufficient_scope: level required by the operation

one of: read, exploitation, full
task_id string

task_already_running: task running on this VPS

Example: tsk_000002d5
family string

rate_limited: exhausted rate limit family

one of: read, mutation, heavy
limit integer (int64)

rate_limited: hourly limit of the family
retry_after integer (int64)

rate_limited: seconds to wait
lock string

server_locked: lock set by the hypervisor (backup, snapshot, suspended…)

Example: snapshot
reason string

server_locked: operation_in_progress, an operation is running, retry after Retry-After; suspended, the VPS is hibernating, start it first; support_notified, abnormal lock, the LWS team has been notified and is taking care of it

one of: operation_in_progress, suspended, support_notified
maintenance object

server_maintenance: nature of the intervention, start and expected end (null for an incident)
kind string

one of: works, incident
started_at string (date-time)
expected_end string (date-time)

502

Dependency unreachable: hypervisor_unreachable; upstream_unavailable — catalog, SSH keys or reinstallation queue unavailable.

Hypervisor unreachable

{
  "type": "https://docs.lws.fr/kvm/errors/hypervisor-unreachable",
  "title": "Hyperviseur injoignable",
  "status": 502,
  "code": "hypervisor_unreachable",
  "detail": "L'hyperviseur hébergeant ce VPS n'a pas répondu. Réessayez dans quelques instants.",
  "request_id": "3f9a1c07b2e45d18"
}

catalog, SSH keys or reinstallation queue unavailable

{
  "type": "https://docs.lws.fr/kvm/errors/upstream-unavailable",
  "title": "Service momentanément indisponible",
  "status": 502,
  "code": "upstream_unavailable",
  "detail": "La demande de réinstallation n'a pas pu être enregistrée. Réessayez dans quelques instants.",
  "request_id": "3f9a1c07b2e45d18"
}

Response fields 18

type string (uri)

Example: https://docs.lws.fr/kvm/errors/vm-not-found

required
title string

Short title, in French

Example: VPS introuvable

required
status integer (int64)

HTTP status

Example: 404

required
code string

Stable machine-readable code (see "Errors" in Getting started)

Example: vm_not_found

required
detail string

Detailed message, in French

Example: Aucun VPS 999999 sur ce compte.

required
request_id string

Identifier of the request, to give to support

Example: 3f9a1c07b2e45d18

required
errors object

validation_failed: message per faulty parameter
required_level string

insufficient_scope: level required by the operation

one of: read, exploitation, full
task_id string

task_already_running: task running on this VPS

Example: tsk_000002d5
family string

rate_limited: exhausted rate limit family

one of: read, mutation, heavy
limit integer (int64)

rate_limited: hourly limit of the family
retry_after integer (int64)

rate_limited: seconds to wait
lock string

server_locked: lock set by the hypervisor (backup, snapshot, suspended…)

Example: snapshot
reason string

server_locked: operation_in_progress, an operation is running, retry after Retry-After; suspended, the VPS is hibernating, start it first; support_notified, abnormal lock, the LWS team has been notified and is taking care of it

one of: operation_in_progress, suspended, support_notified
maintenance object

server_maintenance: nature of the intervention, start and expected end (null for an incident)
kind string

one of: works, incident
started_at string (date-time)
expected_end string (date-time)

503

Host server under intervention: server_maintenance — host server under an intervention announced by LWS and unreachable; honor Retry-After.

{
  "type": "https://docs.lws.fr/kvm/errors/server-maintenance",
  "title": "Intervention en cours sur le serveur hôte",
  "status": 503,
  "code": "server_maintenance",
  "detail": "Le serveur hébergeant ce VPS fait l'objet d'une intervention programmée par LWS : il est momentanément inaccessible. Fin prévue : 2026-10-21T18:00:00+02:00.",
  "request_id": "3f9a1c07b2e45d18",
  "maintenance": {
    "kind": "works",
    "started_at": "2026-10-21T14:00:00+02:00",
    "expected_end": "2026-10-21T18:00:00+02:00"
  }
}

Response fields 18

type string (uri)

Example: https://docs.lws.fr/kvm/errors/vm-not-found

required
title string

Short title, in French

Example: VPS introuvable

required
status integer (int64)

HTTP status

Example: 404

required
code string

Stable machine-readable code (see "Errors" in Getting started)

Example: vm_not_found

required
detail string

Detailed message, in French

Example: Aucun VPS 999999 sur ce compte.

required
request_id string

Identifier of the request, to give to support

Example: 3f9a1c07b2e45d18

required
errors object

validation_failed: message per faulty parameter
required_level string

insufficient_scope: level required by the operation

one of: read, exploitation, full
task_id string

task_already_running: task running on this VPS

Example: tsk_000002d5
family string

rate_limited: exhausted rate limit family

one of: read, mutation, heavy
limit integer (int64)

rate_limited: hourly limit of the family
retry_after integer (int64)

rate_limited: seconds to wait
lock string

server_locked: lock set by the hypervisor (backup, snapshot, suspended…)

Example: snapshot
reason string

server_locked: operation_in_progress, an operation is running, retry after Retry-After; suspended, the VPS is hibernating, start it first; support_notified, abnormal lock, the LWS team has been notified and is taking care of it

one of: operation_in_progress, suspended, support_notified
maintenance object

server_maintenance: nature of the intervention, start and expected end (null for an incident)
kind string

one of: works, incident
started_at string (date-time)
expected_end string (date-time)

Reinstall a VPS

Path parameters

Request body

Responses

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