API Reference

Load Balancers

Pools

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Create Pool

load_balancers.pools.create(PoolCreateParams**kwargs) -> Pool

POST/accounts/{account_id}/load_balancers/pools

Create a new pool.

Security

API Token

The preferred authorization scheme for interacting with the Cloudflare API. Create a token.

Example:Authorization: Bearer Sn3lZJTBX6kkg7OdcBUAxOO963GEIyGQqnFTOFYY

API Email + API Key

The previous authorization scheme for interacting with the Cloudflare API, used in conjunction with a Global API key.

Example:X-Auth-Email: user@example.com

The previous authorization scheme for interacting with the Cloudflare API. When possible, use API tokens instead of Global API keys.

Example:X-Auth-Key: 144c9defac04969c7bfad8efaa8ea194

Accepted Permissions (at least one required)

Load Balancing: Monitors and Pools Write

ParametersExpand Collapse

account_id: str

Identifier.

maxLength32

name: str

A short name (tag) for the pool. Only alphanumeric characters, hyphens, and underscores are allowed.

origins: Iterable[OriginParam]

The list of origins within this pool. Traffic directed at this pool is balanced across all currently healthy origins, provided the pool itself is healthy.

address: Optional[str]

The IP address (IPv4 or IPv6) of the origin, or its publicly addressable hostname. Hostnames entered here should resolve directly to the origin, and not be a hostname proxied by Cloudflare. To set an internal/reserved address, virtual_network_id must also be set.

disabled_at: Optional[datetime]

This field shows up only if the origin is disabled. This field is set with the time the origin was disabled.

formatdate-time

enabled: Optional[bool]

Whether to enable (the default) this origin within the pool. Disabled origins will not receive traffic and are excluded from health checks. The origin will only be disabled for the current pool.

header: Optional[Header]

The request header is used to pass additional information with an HTTP request. Currently supported header is 'Host'.

host: Optional[List[Host]]

The 'Host' header allows to override the hostname set in the HTTP request. Current support is 1 'Host' header override per origin.

name: Optional[str]

A human-identifiable name for the origin.

port: Optional[int]

The port for upstream connections. A value of 0 means the default port for the protocol will be used.

virtual_network_id: Optional[str]

The virtual network subnet ID the origin belongs in. Virtual network must also belong to the account.

weight: Optional[float]

The weight of this origin relative to other origins in the pool. Based on the configured weight the total traffic is distributed among origins within the pool.

• origin_steering.policy="least_outstanding_requests": Use weight to scale the origin's outstanding requests.
• origin_steering.policy="least_connections": Use weight to scale the origin's open connections.

maximum1

minimum0

multipleOf0.01

description: Optional[str]

A human-readable description of the pool.

enabled: Optional[bool]

Whether to enable (the default) or disable this pool. Disabled pools will not receive traffic and are excluded from health checks. Disabling a pool will cause any load balancers using it to failover to the next pool (if any).

latitude: Optional[float]

The latitude of the data center containing the origins used in this pool in decimal degrees. If this is set, longitude must also be set.

load_shedding: Optional[LoadSheddingParam]

Configures load shedding policies and percentages for the pool.

default_percent: Optional[float]

The percent of traffic to shed from the pool, according to the default policy. Applies to new sessions and traffic without session affinity.

maximum100

minimum0

default_policy: Optional[Literal["random", "hash"]]

The default policy to use when load shedding. A random policy randomly sheds a given percent of requests. A hash policy computes a hash over the CF-Connecting-IP address and sheds all requests originating from a percent of IPs.

One of the following:

"random"

"hash"

session_percent: Optional[float]

The percent of existing sessions to shed from the pool, according to the session policy.

maximum100

minimum0

session_policy: Optional[Literal["hash"]]

Only the hash policy is supported for existing sessions (to avoid exponential decay).

longitude: Optional[float]

The longitude of the data center containing the origins used in this pool in decimal degrees. If this is set, latitude must also be set.

minimum_origins: Optional[int]

The minimum number of origins that must be healthy for this pool to serve traffic. If the number of healthy origins falls below this number, the pool will be marked unhealthy and will failover to the next available pool.

monitor: Optional[str]

The ID of the Monitor to use for checking the health of origins within this pool.

monitor_group: Optional[str]

The ID of the Monitor Group to use for checking the health of origins within this pool.

notification_email: Optional[str]

This field is now deprecated. It has been moved to Cloudflare's Centralized Notification service https://developers.cloudflare.com/fundamentals/notifications/. The email address to send health status notifications to. This can be an individual mailbox or a mailing list. Multiple emails can be supplied as a comma delimited list.

notification_filter: Optional[NotificationFilterParam]

Filter pool and origin health notifications by resource type or health status. Use null to reset.

origin: Optional[FilterOptions]

Filter options for a particular resource type (pool or origin). Use null to reset.

disable: Optional[bool]

If set true, disable notifications for this type of resource (pool or origin).

healthy: Optional[bool]

If present, send notifications only for this health status (e.g. false for only DOWN events). Use null to reset (all events).

pool: Optional[FilterOptions]

Filter options for a particular resource type (pool or origin). Use null to reset.

disable: Optional[bool]

If set true, disable notifications for this type of resource (pool or origin).

healthy: Optional[bool]

If present, send notifications only for this health status (e.g. false for only DOWN events). Use null to reset (all events).

origin_steering: Optional[OriginSteeringParam]

Configures origin steering for the pool. Controls how origins are selected for new sessions and traffic without session affinity.

policy: Optional[Literal["random", "hash", "least_outstanding_requests", "least_connections"]]

The type of origin steering policy to use.

• "random": Select an origin randomly.
• "hash": Select an origin by computing a hash over the CF-Connecting-IP address.
• "least_outstanding_requests": Select an origin by taking into consideration origin weights, as well as each origin's number of outstanding requests. Origins with more pending requests are weighted proportionately less relative to others.
• "least_connections": Select an origin by taking into consideration origin weights, as well as each origin's number of open connections. Origins with more open connections are weighted proportionately less relative to others. Supported for HTTP/1 and HTTP/2 connections.

One of the following:

"random"

"hash"

"least_outstanding_requests"

"least_connections"

ReturnsExpand Collapse

class Pool: …

id: Optional[str]

check_regions: Optional[List[CheckRegion]]

A list of regions from which to run health checks. Null means every Cloudflare data center.

One of the following:

"WNAM"

"ENAM"

"WEU"

"EEU"

"NSAM"

"SSAM"

"OC"

"ME"

"NAF"

"SAF"

"SAS"

"SEAS"

"NEAS"

"ALL_REGIONS"

created_on: Optional[str]

description: Optional[str]

A human-readable description of the pool.

disabled_at: Optional[datetime]

This field shows up only if the pool is disabled. This field is set with the time the pool was disabled at.

formatdate-time

enabled: Optional[bool]

Whether to enable (the default) or disable this pool. Disabled pools will not receive traffic and are excluded from health checks. Disabling a pool will cause any load balancers using it to failover to the next pool (if any).

latitude: Optional[float]

The latitude of the data center containing the origins used in this pool in decimal degrees. If this is set, longitude must also be set.

load_shedding: Optional[LoadShedding]

Configures load shedding policies and percentages for the pool.

default_percent: Optional[float]

The percent of traffic to shed from the pool, according to the default policy. Applies to new sessions and traffic without session affinity.

maximum100

minimum0

default_policy: Optional[Literal["random", "hash"]]

The default policy to use when load shedding. A random policy randomly sheds a given percent of requests. A hash policy computes a hash over the CF-Connecting-IP address and sheds all requests originating from a percent of IPs.

One of the following:

"random"

"hash"

session_percent: Optional[float]

The percent of existing sessions to shed from the pool, according to the session policy.

maximum100

minimum0

session_policy: Optional[Literal["hash"]]

Only the hash policy is supported for existing sessions (to avoid exponential decay).

longitude: Optional[float]

The longitude of the data center containing the origins used in this pool in decimal degrees. If this is set, latitude must also be set.

minimum_origins: Optional[int]

The minimum number of origins that must be healthy for this pool to serve traffic. If the number of healthy origins falls below this number, the pool will be marked unhealthy and will failover to the next available pool.

modified_on: Optional[str]

monitor: Optional[str]

The ID of the Monitor to use for checking the health of origins within this pool.

monitor_group: Optional[str]

The ID of the Monitor Group to use for checking the health of origins within this pool.

name: Optional[str]

A short name (tag) for the pool. Only alphanumeric characters, hyphens, and underscores are allowed.

networks: Optional[List[str]]

List of networks where Load Balancer or Pool is enabled.

notification_email: Optional[str]

This field is now deprecated. It has been moved to Cloudflare's Centralized Notification service https://developers.cloudflare.com/fundamentals/notifications/. The email address to send health status notifications to. This can be an individual mailbox or a mailing list. Multiple emails can be supplied as a comma delimited list.

notification_filter: Optional[NotificationFilter]

Filter pool and origin health notifications by resource type or health status. Use null to reset.

origin: Optional[FilterOptions]

Filter options for a particular resource type (pool or origin). Use null to reset.

disable: Optional[bool]

If set true, disable notifications for this type of resource (pool or origin).

healthy: Optional[bool]

If present, send notifications only for this health status (e.g. false for only DOWN events). Use null to reset (all events).

pool: Optional[FilterOptions]

Filter options for a particular resource type (pool or origin). Use null to reset.

disable: Optional[bool]

If set true, disable notifications for this type of resource (pool or origin).

healthy: Optional[bool]

If present, send notifications only for this health status (e.g. false for only DOWN events). Use null to reset (all events).

origin_steering: Optional[OriginSteering]

Configures origin steering for the pool. Controls how origins are selected for new sessions and traffic without session affinity.

policy: Optional[Literal["random", "hash", "least_outstanding_requests", "least_connections"]]

The type of origin steering policy to use.

• "random": Select an origin randomly.
• "hash": Select an origin by computing a hash over the CF-Connecting-IP address.
• "least_outstanding_requests": Select an origin by taking into consideration origin weights, as well as each origin's number of outstanding requests. Origins with more pending requests are weighted proportionately less relative to others.
• "least_connections": Select an origin by taking into consideration origin weights, as well as each origin's number of open connections. Origins with more open connections are weighted proportionately less relative to others. Supported for HTTP/1 and HTTP/2 connections.

One of the following:

"random"

"hash"

"least_outstanding_requests"

"least_connections"

origins: Optional[List[Origin]]

The list of origins within this pool. Traffic directed at this pool is balanced across all currently healthy origins, provided the pool itself is healthy.

address: Optional[str]

The IP address (IPv4 or IPv6) of the origin, or its publicly addressable hostname. Hostnames entered here should resolve directly to the origin, and not be a hostname proxied by Cloudflare. To set an internal/reserved address, virtual_network_id must also be set.

disabled_at: Optional[datetime]

This field shows up only if the origin is disabled. This field is set with the time the origin was disabled.

formatdate-time

enabled: Optional[bool]

Whether to enable (the default) this origin within the pool. Disabled origins will not receive traffic and are excluded from health checks. The origin will only be disabled for the current pool.

header: Optional[Header]

The request header is used to pass additional information with an HTTP request. Currently supported header is 'Host'.

host: Optional[List[Host]]

The 'Host' header allows to override the hostname set in the HTTP request. Current support is 1 'Host' header override per origin.

name: Optional[str]

A human-identifiable name for the origin.

port: Optional[int]

The port for upstream connections. A value of 0 means the default port for the protocol will be used.

virtual_network_id: Optional[str]

The virtual network subnet ID the origin belongs in. Virtual network must also belong to the account.

weight: Optional[float]

The weight of this origin relative to other origins in the pool. Based on the configured weight the total traffic is distributed among origins within the pool.

• origin_steering.policy="least_outstanding_requests": Use weight to scale the origin's outstanding requests.
• origin_steering.policy="least_connections": Use weight to scale the origin's open connections.

maximum1

minimum0

multipleOf0.01

Create Pool

Python

HTTP

TypeScript

Python

Go

Terraform

import os
from cloudflare import Cloudflare

client = Cloudflare(
    api_token=os.environ.get("CLOUDFLARE_API_TOKEN"),  # This is the default and can be omitted
)
pool = client.load_balancers.pools.create(
    account_id="023e105f4ecef8ad9ca31a8372d0c353",
    name="primary-dc-1",
    origins=[{}],
)
print(pool.id)

200 example

{
  "errors": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "messages": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "result": {
    "id": "17b5962d775c646f3f9725cbc7a53df4",
    "check_regions": [
      "WEU",
      "ENAM"
    ],
    "created_on": "2014-01-01T05:20:00.12345Z",
    "description": "Primary data center - Provider XYZ",
    "disabled_at": "2019-12-27T18:11:19.117Z",
    "enabled": false,
    "latitude": 0,
    "load_shedding": {
      "default_percent": 0,
      "default_policy": "random",
      "session_percent": 0,
      "session_policy": "hash"
    },
    "longitude": 0,
    "minimum_origins": 0,
    "modified_on": "2014-01-01T05:20:00.12345Z",
    "monitor": "monitor",
    "monitor_group": "monitor_group",
    "name": "primary-dc-1",
    "networks": [
      "string"
    ],
    "notification_email": "someone@example.com,sometwo@example.com",
    "notification_filter": {
      "origin": {
        "disable": true,
        "healthy": true
      },
      "pool": {
        "disable": true,
        "healthy": false
      }
    },
    "origin_steering": {
      "policy": "random"
    },
    "origins": [
      {
        "address": "0.0.0.0",
        "disabled_at": "2019-12-27T18:11:19.117Z",
        "enabled": true,
        "header": {
          "Host": [
            "example.com"
          ]
        },
        "name": "app-server-1",
        "port": 0,
        "virtual_network_id": "a5624d4e-044a-4ff0-b3e1-e2465353d4b4",
        "weight": 0.6
      }
    ]
  },
  "success": true
}

Returns Examples

200 example

{
  "errors": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "messages": [
    {
      "code": 1000,
      "message": "message",
      "documentation_url": "documentation_url",
      "source": {
        "pointer": "pointer"
      }
    }
  ],
  "result": {
    "id": "17b5962d775c646f3f9725cbc7a53df4",
    "check_regions": [
      "WEU",
      "ENAM"
    ],
    "created_on": "2014-01-01T05:20:00.12345Z",
    "description": "Primary data center - Provider XYZ",
    "disabled_at": "2019-12-27T18:11:19.117Z",
    "enabled": false,
    "latitude": 0,
    "load_shedding": {
      "default_percent": 0,
      "default_policy": "random",
      "session_percent": 0,
      "session_policy": "hash"
    },
    "longitude": 0,
    "minimum_origins": 0,
    "modified_on": "2014-01-01T05:20:00.12345Z",
    "monitor": "monitor",
    "monitor_group": "monitor_group",
    "name": "primary-dc-1",
    "networks": [
      "string"
    ],
    "notification_email": "someone@example.com,sometwo@example.com",
    "notification_filter": {
      "origin": {
        "disable": true,
        "healthy": true
      },
      "pool": {
        "disable": true,
        "healthy": false
      }
    },
    "origin_steering": {
      "policy": "random"
    },
    "origins": [
      {
        "address": "0.0.0.0",
        "disabled_at": "2019-12-27T18:11:19.117Z",
        "enabled": true,
        "header": {
          "Host": [
            "example.com"
          ]
        },
        "name": "app-server-1",
        "port": 0,
        "virtual_network_id": "a5624d4e-044a-4ff0-b3e1-e2465353d4b4",
        "weight": 0.6
      }
    ]
  },
  "success": true
}