Manage origin server pools

You can create a pool within the load balancer workflow or in the Origin Pools section of the dashboard:

1. Go to Traffic > Load Balancing.

2. Click Manage Pools.

3. Click Create.

4. For your pool, enter the following information:

   • A name (must be unique)
   • A description to provide more detail on the name
   • A choice for Origin Steering, which affects how your pool routes traffic to each origin

5. For each origin, enter the following information:

   • A name (must be unique)
   • The origin server address or associated hostname
   • A Weight
   • (Optional) A hostname by clicking Add host header

6. Repeat this process for additional origins in the pool.

7. (Optional) Set up coordinates for Proximity Steering on the pool.

8. On the origin pool, update the following information:

   • Health Threshold: Number of healthy origins for the pool as a whole to be considered Healthy and receive traffic based on pool order in a load balancer
   • Monitor: Attach a monitor
   • Health Check Regions: Choose whether to check pool health from multiple locations, which increases accuracy but can lead to probe traffic to your origin
   • Pool Notifications: You can set up new alerts - and view existing alerts - to be notified when pools are enabled or disabled, or pools or origins have changes in their health status.

9. When finished, click Save.

For a full list of properties, refer to Create Pool Open external link . If you need help with API authentication, refer to Cloudflare API Quickstart.

Request
curl -X POST \
-H "X-Auth-Email: user@cloudflare.com" \
-H "X-Auth-Key: REDACTED" \
"https://api.cloudflare.com/client/v4/accounts/:account_id/load-balancers/pools" \
-H "Content-Type: application/json" \
-d '{
    "description":"Primary data center - Provider XYZ",
    "name":"primary-dc-1",
    "enabled":false,
    "load_shedding": {
        "default_percent":0,
        "default_policy":"random",
        "session_percent":0,
        "session_policy":"hash"
    },
    "minimum_origins":2,
    "monitor":"f1aba936b94213e5b8dca0c0dbf1f9cc",
    "check_regions": [
        "WEU",
        "ENAM"
    ],
    "origins": [
      {
        "name":"app-server-1",
        "address":"0.0.0.0",
        "enabled":true,
        "weight":0.56,
        "header": {
        "Host": [
            "example.com"
          ]
        }
      }
    ],
    "origin_steering": {
      "policy": "random"
    },
    "notification_filter": {
        "origin": {
            "disable":false,
            "healthy":null
        },
        "pool": {
            "disable":false,
            "healthy":null
        }
    }
}'

The response contains the complete definition of the new pool.

Response
{
  "success": true,
  "errors": [],
  "messages": [],
  "result": {
    "id": "17b5962d775c646f3f9725cbc7a53df4",
    "created_on": "2021-01-01T05:20:00.12345Z",
    "modified_on": "2021-01-01T05:20:00.12345Z",
    "description": "Primary data center - Provider XYZ",
    "name": "primary-dc-1",
    "enabled": false,
    "load_shedding": {
      "default_percent": 0,
      "default_policy": "random",
      "session_percent": 0,
      "session_policy": "hash"
    },
    "minimum_origins": 2,
    "monitor": "f1aba936b94213e5b8dca0c0dbf1f9cc",
    "check_regions": [
      "WEU",
      "ENAM"
    ],
    "origins": [
      {
        "name": "app-server-1",
        "address": "0.0.0.0",
        "enabled": true,
        "weight": 0.56,
        "header": {
          "Host": [
            "example.com"
          ]
        }
      }
    ],
    "origin_steering": {
      "policy": "random"
    },
    "notification_filter": {
      "origin": {
        "disable": false,
        "healthy": null
      },
      "pool": {
        "disable": false,
        "healthy": null
      }
    }
  }
}

After creating the pool, you would also want to create a new notification Open external link with the following parameters specified:

"alert_type": "load_balancing_health_alert",
"filters": {
    "pool_id": <<ARRAY_OF_INCLUDED_POOL_IDS>>,
    "new_health": <<ARRAY_OF_STATUS_TRIGGERS>> ["Unhealthy", "Healthy"],
    "event_source": <<ARRAY_OF_OBJECTS_WATCHED>> ["pool", "origin"]
}

To edit a pool in the dashboard:

1. Go to Traffic > Load Balancing.
2. Click Manage Pools.
3. On a specific pool, click Edit.
4. Update settings as needed.
5. Click Save.

When you edit a pool with the API, your request type depends on how much you want to edit.

To update specific settings without having to resubmit the entire configuration, use a PATCH Open external link request. For broader changes, use a PUT Open external link request.

To delete a pool in the dashboard:

1. Go to Traffic > Load Balancing.
2. Click Manage Pools.
3. On a specific pool, click Delete.

To delete a pool using the API, send a DELETE Open external link request.