> ## Documentation Index > Fetch the complete documentation index at: https://docs.gcore.com/llms.txt > Use this file to discover all available pages before exploring further. # Update load balancer pool health monitor > Updates the health monitor of a load balancer pool, such as its check intervals, timeouts, and the thresholds used to mark pool members as healthy or unhealthy. Only the supplied fields are changed. Returns 404 if the pool has no health monitor attached. If a provided field already matches the current health monitor state it is skipped, and when no field changes anything no task is created and an empty task list is returned. ## OpenAPI ````yaml /api-reference/services_docs_mintlify_enriched/cloud_api.yaml patch /cloud/v1/lbpools/{project_id}/{region_id}/{pool_id}/healthmonitor openapi: 3.1.0 info: title: Gcore OpenAPI – Cloud API description: >- This OpenAPI is an aggregated OpenAPI specification that unifies all Gcore products into a single file. It covers Cloud, CDN, DNS, WAAP, DDoS Protection, Object Storage, Streaming, and FastEdge services. version: 33e21ba9a1ae servers: - url: https://api.gcore.com security: - APIKey: [] tags: - name: Bare Metal - name: Container as a Service - name: Cost Reports - name: DDoS Protection - name: Everywhere Inference - name: Everywhere Inference Apps - name: File Shares - name: Floating IPs - name: Function as a Service - name: GPU Bare Metal - name: GPU Virtual - name: IP Ranges - name: Images - name: Instances - name: Load Balancers - name: Logging - name: Managed Kubernetes - name: Managed PostgreSQL - name: Networks - name: Placement Groups - name: Ports - name: Pricing - name: Projects - name: Quotas - name: Regions - name: Registry - name: Reservations - name: Reserved IPs - name: Routers - name: SSH Keys - name: Secrets - name: Security Groups - name: Snapshot Schedules - name: Snapshots - name: Tasks - name: User Actions - name: User Role Assignments - name: Volumes paths: /cloud/v1/lbpools/{project_id}/{region_id}/{pool_id}/healthmonitor: patch: tags: - Load Balancers summary: Update load balancer pool health monitor description: >- Updates the health monitor of a load balancer pool, such as its check intervals, timeouts, and the thresholds used to mark pool members as healthy or unhealthy. Only the supplied fields are changed. Returns 404 if the pool has no health monitor attached. If a provided field already matches the current health monitor state it is skipped, and when no field changes anything no task is created and an empty task list is returned. operationId: LoadBalancerPoolInstanceHealthMonitorViewSet.patch parameters: - in: path name: project_id required: true description: Project ID schema: description: Project ID example: 1 examples: - 1 title: Project Id type: integer - in: path name: region_id required: true description: Region ID schema: description: Region ID example: 1 examples: - 1 exclusiveMinimum: 0 title: Region Id type: integer - in: path name: pool_id required: true description: Pool ID schema: description: Pool ID example: 00000000-0000-4000-8000-000000000000 examples: - 00000000-0000-4000-8000-000000000000 format: uuid4 title: Pool Id type: string requestBody: content: application/json: schema: $ref: '#/components/schemas/PatchLbHealthMonitorSerializerV2' responses: '200': description: Task IDs content: application/json: schema: $ref: '#/components/schemas/TaskIDsSerializer' '400': $ref: '#/components/responses/ProblemBadRequestWithLegacyKeys' '401': $ref: '#/components/responses/ProblemUnauthorizedWithLegacyKeys' '403': $ref: '#/components/responses/ProblemForbiddenWithLegacyKeys' '404': $ref: '#/components/responses/ProblemNotFoundWithLegacyKeys' '409': $ref: '#/components/responses/ProblemConflictWithLegacyKeys' '500': $ref: '#/components/responses/ProblemInternalServerErrorWithLegacyKeys' '503': $ref: '#/components/responses/ProblemServiceUnavailableWithLegacyKeys' x-codeSamples: - lang: Python source: >- import os from gcore import Gcore client = Gcore( api_key=os.environ.get("GCORE_API_KEY"), # This is the default and can be omitted ) task_id_list = client.cloud.load_balancers.pools.health_monitors.update( pool_id="00000000-0000-4000-8000-000000000000", project_id=1, region_id=1, ) print(task_id_list.tasks) - lang: Go source: "package main\n\nimport (\n\t\"context\"\n\t\"fmt\"\n\n\t\"github.com/G-Core/gcore-go\"\n\t\"github.com/G-Core/gcore-go/cloud\"\n\t\"github.com/G-Core/gcore-go/option\"\n)\n\nfunc main() {\n\tclient := gcore.NewClient(\n\t\toption.WithAPIKey(\"My API Key\"),\n\t)\n\ttaskIDList, err := client.Cloud.LoadBalancers.Pools.HealthMonitors.Update(\n\t\tcontext.TODO(),\n\t\t\"00000000-0000-4000-8000-000000000000\",\n\t\tcloud.LoadBalancerPoolHealthMonitorUpdateParams{\n\t\t\tProjectID: gcore.Int(1),\n\t\t\tRegionID: gcore.Int(1),\n\t\t},\n\t)\n\tif err != nil {\n\t\tpanic(err.Error())\n\t}\n\tfmt.Printf(\"%+v\\n\", taskIDList.Tasks)\n}\n" components: schemas: PatchLbHealthMonitorSerializerV2: properties: admin_state_up: description: >- Administrative state of the resource. Omit to leave unchanged; `false` disables the resource so it will not process traffic. example: true examples: - true - false title: Admin State Up type: boolean delay: description: >- The time, in seconds, between sending probes to members. Omit to leave unchanged. example: 10 examples: - 10 maximum: 2147483647 minimum: 1 title: Delay type: integer domain_name: anyOf: - pattern: ^[A-Za-z0-9._-]{1,253}$ type: string - type: 'null' description: >- Domain name for HTTP host header. Can only be used together with `HTTP` or `HTTPS` health monitor type. Omit to leave unchanged. Set to `null` to clear the current value. examples: - example.com title: Domain Name expected_codes: anyOf: - pattern: ^(\d{3}(\s*,\s*\d{3})*)$|^(\d{3}-\d{3})$ type: string - type: 'null' description: >- Expected HTTP response codes. Can be a single code, a comma-separated list of codes, or a single range of codes. Can only be used together with `HTTP` or `HTTPS` health monitor type. For example, 200, 200,202,401,403,404, or 200-204. Omit to leave unchanged. Set to `null` to clear the current value. examples: - 200,301,302 title: Expected Codes http_method: anyOf: - $ref: '#/components/schemas/HttpMethodEnum' - type: 'null' description: >- HTTP method. Can only be used together with `HTTP` or `HTTPS` health monitor type. Omit to leave unchanged. Set to `null` to clear the current value. examples: - CONNECT - DELETE - GET - HEAD - OPTIONS - PATCH - POST - PUT - TRACE http_version: anyOf: - enum: - '1.0' - '1.1' type: string - type: 'null' description: >- HTTP version. Can only be used together with `HTTP` or `HTTPS` health monitor type. Supported values: 1.0, 1.1. Omit to leave unchanged. Set to `null` to clear the current value. examples: - '1.1' - '1.0' title: Http Version max_retries: description: >- Number of successes before the member is switched to ONLINE state. Omit to leave unchanged. example: 2 examples: - 2 maximum: 10 minimum: 1 title: Max Retries type: integer max_retries_down: description: >- Number of failures before the member is switched to ERROR state. Omit to leave unchanged. example: 2 examples: - 2 maximum: 10 minimum: 1 title: Max Retries Down type: integer timeout: description: >- The maximum time to connect. Must be less than the delay value. Omit to leave unchanged. example: 5 examples: - 5 maximum: 2147483 minimum: 0 title: Timeout type: integer url_path: anyOf: - pattern: ^/([^/?#%]+(/[^/?#%]+)*/?)?$ type: string - type: 'null' description: >- The HTTP path the health monitor requests on each member. Can only be used with `HTTP` or `HTTPS` health monitor type. Must start with `/` and contain only plain path segments. Query strings (`?`), fragments (`#`), percent-encoding (`%`), and consecutive slashes (`//`) are not allowed. Examples of valid paths: - `/` — check the root (most common) - `/healthz` — a dedicated health endpoint Omit to leave unchanged. Set to `null` to clear the current value. examples: - / - /healthz title: Url Path title: PatchLbHealthMonitorSerializerV2 type: object TaskIDsSerializer: properties: tasks: description: >- List of task IDs representing asynchronous operations. Use these IDs to monitor operation progress: - `GET /v1/tasks/{task_id}` - Check individual task status and details Poll task status until completion (`FINISHED`/`ERROR`) before proceeding with dependent operations. example: - d478ae29-dedc-4869-82f0-96104425f565 examples: - - d478ae29-dedc-4869-82f0-96104425f565 items: type: string title: Tasks type: array required: - tasks title: TaskIDsSerializer type: object HttpMethodEnum: enum: - CONNECT - DELETE - GET - HEAD - OPTIONS - PATCH - POST - PUT - TRACE title: HttpMethodEnum type: string ProblemWithLegacyKeys: additionalProperties: false description: >- The error body of an endpoint that was released before the problem body. The old keys stay next to the problem fields until the endpoint is removed. properties: context: anyOf: - $ref: '#/components/schemas/ProblemContext' - type: 'null' default: null description: >- Data for the `type`. Absent on a type without context keys, and on a `not-found` for an unknown URL. detail: description: The facts of this occurrence. title: Detail type: string errors: anyOf: - items: $ref: '#/components/schemas/ProblemError' type: array - type: 'null' default: null description: >- One item for each invalid input. Only on `validation-error`, and absent when no single input is wrong. title: Errors exception_class: deprecated: true description: The old name of the error. Use `type`. title: Exception Class type: string hint: description: What to do next. title: Hint type: string info: default: null deprecated: true description: Old data about the error. Use `context`. title: Info invalid_fields: default: null deprecated: true description: The old list of the invalid inputs. Use `errors`. title: Invalid Fields message: deprecated: true description: The old text of the error. Use `detail`. title: Message type: string request_id: description: >- ID of the request. The response also sends it in the `X-Request-Id` header. Quote it to support. title: Request Id type: string status: description: Copy of the HTTP status code. title: Status type: integer title: description: Fixed sentence for the `type`. title: Title type: string trace_id: anyOf: - type: string - type: 'null' description: >- W3C trace ID from the `traceparent` of the request. Null when the request has no valid `traceparent`. title: Trace Id type: $ref: '#/components/schemas/ProblemType' description: >- Stable error code in kebab-case, such as `not-found`. Clients branch on it. It is not `errors[].code`, which names what is wrong with one input in `snake_case`, such as `not_found`. required: - type - title - status - detail - hint - request_id - trace_id - exception_class - message title: ProblemWithLegacyKeys type: object ProblemContext: additionalProperties: false description: >- Data for the `type`. One flat object shared by all types. Each `type` always sends the same keys, and a key that the server cannot fill is `null`. The keys of each type: - `resource-in-use`: `blocking_resources`, `blocking_count` - `quota-exceeded`: `quotas` - `not-available`: `reason`, `region_id`, `resource_type`, `resource_id` - `permission-denied`: `operation`, `client_id`, `project_id` - `not-found`: `resource_type`, `resource_id` - `method-not-allowed`: `allowed_methods` - `resource-busy`: `resource_type`, `resource_id`, `resource_status` - `rate-limited`: `retry_after` - `service-unavailable`: `retry_after` The other types send no `context`, and neither does a `not-found` for an unknown URL. properties: allowed_methods: anyOf: - items: type: string type: array - type: 'null' default: null description: Methods that the endpoint supports. title: Allowed Methods blocking_count: anyOf: - type: integer - type: 'null' default: null description: Total number of blocking resources. title: Blocking Count blocking_resources: anyOf: - items: $ref: '#/components/schemas/ProblemBlockingResource' type: array - type: 'null' default: null description: At most 50 resources that block the request. title: Blocking Resources client_id: anyOf: - type: integer - type: 'null' default: null description: The account of the operation. title: Client Id operation: anyOf: - type: string - type: 'null' default: null description: Name of the operation that the credentials lack. title: Operation project_id: anyOf: - type: integer - type: 'null' default: null description: The project of the operation. title: Project Id quotas: anyOf: - items: $ref: '#/components/schemas/ProblemQuota' type: array - type: 'null' default: null description: The quotas that the request exceeds. title: Quotas reason: anyOf: - $ref: '#/components/schemas/NotAvailableReason' - type: 'null' default: null description: Why the resource is not available. region_id: anyOf: - type: integer - type: 'null' default: null description: The region of the error. title: Region Id resource_id: anyOf: - type: string - type: 'null' default: null description: ID or name of the resource. title: Resource Id resource_status: anyOf: - type: string - type: 'null' default: null description: Current status of the resource. title: Resource Status resource_type: anyOf: - type: string - type: 'null' default: null description: >- Type of the resource, as the permissions name it, such as `instances`. title: Resource Type retry_after: anyOf: - type: integer - type: 'null' default: null description: >- Seconds to wait before the next request. `null` when the server cannot tell. title: Retry After title: ProblemContext type: object ProblemError: additionalProperties: false description: One invalid input. properties: code: description: >- What is wrong, as a code from a fixed list, such as `missing`, `int_parsing` or `less_than_equal`, or one of the shared codes: `not_unique`, `not_found`, `mutually_exclusive`, `missing_one_of`, `incompatible_value`, `invalid_format`, `duplicate_item`, `invalid_status`. Codes are only added, never renamed or removed. Treat an unknown code like `value_error`. type: string ctx: anyOf: - additionalProperties: true type: object - type: 'null' default: null description: >- Values of the broken constraint, such as `{"le": 4096}`. Absent when the check has no values. title: Ctx detail: description: What is wrong with the input. title: Detail type: string loc: description: >- Path to the input. Starts with `body`, `query`, `path` or `header`. A query filter is the parameter, then the operator: `name[contains]` is `["query", "name", "contains"]`. items: anyOf: - type: string - type: integer title: Loc type: array required: - loc - code - detail title: ProblemError type: object ProblemType: enum: - internal-server-error - method-not-allowed - not-available - not-found - permission-denied - quota-exceeded - rate-limited - resource-busy - resource-in-use - service-unavailable - unauthorized - validation-error title: ProblemType type: string ProblemBlockingResource: additionalProperties: false description: One resource that blocks the request. properties: resource_id: description: ID of the blocking resource. title: Resource Id type: string resource_name: anyOf: - type: string - type: 'null' default: null description: Name of the blocking resource. title: Resource Name resource_type: description: >- Type of the blocking resource, as the permissions name it, such as `ports`. title: Resource Type type: string required: - resource_type - resource_id title: ProblemBlockingResource type: object ProblemQuota: additionalProperties: false description: One quota that the request exceeds. properties: available: anyOf: - type: integer - type: number description: '`limit` minus `usage`.' title: Available limit: anyOf: - type: integer - type: number description: The limit of the quota. title: Limit name: description: Quota name, such as `vm_count`. title: Name type: string overflow: anyOf: - type: integer - type: number description: 'The amount above the limit: `resulting_usage` minus `limit`.' title: Overflow region_id: anyOf: - type: integer - type: 'null' description: >- Region of a regional quota. `null` for a global quota, or when unknown. title: Region Id requested: anyOf: - type: integer - type: number description: The amount that the request adds. title: Requested resulting_usage: anyOf: - type: integer - type: number description: 'The usage after the request: `usage` plus `requested`.' title: Resulting Usage scope: anyOf: - $ref: '#/components/schemas/QuotaScope' - type: 'null' description: >- `regional` for a quota of one region, `global` for a quota of the account. `null` when the server cannot tell. unit: anyOf: - type: string - type: 'null' description: >- Unit of the numbers, such as `MiB`, `GiB` or `bytes`. `null` for a quota that counts items. title: Unit usage: anyOf: - type: integer - type: number description: The usage before the request. title: Usage required: - name - scope - region_id - limit - usage - available - requested - resulting_usage - overflow - unit title: ProblemQuota type: object NotAvailableReason: enum: - account - balance - capacity - plan - region title: NotAvailableReason type: string QuotaScope: enum: - global - regional title: QuotaScope type: string responses: ProblemBadRequestWithLegacyKeys: description: >- The request cannot succeed as it is. `type` is `validation-error`, `resource-in-use`, `quota-exceeded` or `not-available`. content: application/problem+json: schema: $ref: '#/components/schemas/ProblemWithLegacyKeys' headers: X-Request-Id: $ref: '#/components/headers/RequestId' Content-Language: $ref: '#/components/headers/ContentLanguage' ProblemUnauthorizedWithLegacyKeys: description: The request has no valid credentials. `type` is `unauthorized`. content: application/problem+json: schema: $ref: '#/components/schemas/ProblemWithLegacyKeys' headers: X-Request-Id: $ref: '#/components/headers/RequestId' Content-Language: $ref: '#/components/headers/ContentLanguage' ProblemForbiddenWithLegacyKeys: description: >- The credentials do not permit the operation, or another service manages the resource. `type` is `permission-denied`. content: application/problem+json: schema: $ref: '#/components/schemas/ProblemWithLegacyKeys' headers: X-Request-Id: $ref: '#/components/headers/RequestId' Content-Language: $ref: '#/components/headers/ContentLanguage' ProblemNotFoundWithLegacyKeys: description: The resource or the URL does not exist. `type` is `not-found`. content: application/problem+json: schema: $ref: '#/components/schemas/ProblemWithLegacyKeys' headers: X-Request-Id: $ref: '#/components/headers/RequestId' Content-Language: $ref: '#/components/headers/ContentLanguage' ProblemConflictWithLegacyKeys: description: >- The resource is in a transient state. `type` is `resource-busy`. Send the same request again after the `Retry-After` seconds. content: application/problem+json: schema: $ref: '#/components/schemas/ProblemWithLegacyKeys' headers: X-Request-Id: $ref: '#/components/headers/RequestId' Content-Language: $ref: '#/components/headers/ContentLanguage' Retry-After: $ref: '#/components/headers/RetryAfter' ProblemInternalServerErrorWithLegacyKeys: description: >- The server cannot complete the request. `type` is `internal-server-error`. content: application/problem+json: schema: $ref: '#/components/schemas/ProblemWithLegacyKeys' headers: X-Request-Id: $ref: '#/components/headers/RequestId' Content-Language: $ref: '#/components/headers/ContentLanguage' ProblemServiceUnavailableWithLegacyKeys: description: >- The service is down for a known reason, such as planned maintenance. `type` is `service-unavailable`. A 503 without the `application/problem+json` media type, and every 502 and 504, comes from the gateway and has no problem body. content: application/problem+json: schema: $ref: '#/components/schemas/ProblemWithLegacyKeys' headers: X-Request-Id: $ref: '#/components/headers/RequestId' Content-Language: $ref: '#/components/headers/ContentLanguage' headers: RequestId: description: The ID of the request, the same as `request_id` in the body. schema: type: string ContentLanguage: description: >- The language of `title`, `detail`, `hint` and `errors[].detail`, from the `Accept-Language` of the request. Any other field is the same in every language. schema: type: string enum: - en - de - ru - az - zh - fr - es - pt - ko - ja - tr RetryAfter: description: >- The number of seconds to wait before the client sends the same request again. schema: type: integer minimum: 0 maximum: 60 securitySchemes: APIKey: description: >- API key for authentication. Make sure to include the word `apikey`, followed by a single space and then your token. Example: `apikey 1234_abcdef` type: apiKey in: header name: Authorization ````