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Cloud IPs

When you look at k6 tests from the side of your server, it's often helpful to know which IPs are associated with k6 Cloud tests.

IP addresses used by k6 Cloud

k6 Cloud uses AWS for load generators. For the IP addresses used in the different load zones and filtering methods, refer directly to Amazon.

If you prefer to view the ranges directly, this ip-ranges.json file provides the updated list of IP addresses used by our load generators. To find the IP ranges that you can use, filter the service of type EC2 and the region of the selected load zones in your test configuration.

The zone codes are mapped as follows:

  • af-south-1: Cape Town
  • ap-east-1: Hong Kong
  • ap-northeast-1: Tokyo
  • ap-northeast-2: Seoul
  • ap-northeast-3: Osaka
  • ap-southeast-1: Singapore
  • ap-southeast-2: Sydney
  • ap-south-1: Mumbai
  • ca-central-1: Montreal
  • eu-north-1: Stockholm
  • eu-central-1: Frankfurt
  • eu-south-1: Milan
  • eu-west-1: Dublin
  • eu-west-2: London
  • eu-west-3: Paris
  • me-south-1: Bahrain
  • us-east1: Ashburn
  • us-east-2: Columbus
  • us-west-1: Palo Alto
  • us-west-2: Portland
  • sa-east-1: São Paulo

Maximum VUs per IP

k6 has 3 tiers of hardware for load generation. The tier k6 chooses depends on the number of VUs allocated to a load zone.

  • Tier 1 when the load zone has 1-999 VUs
  • Tier 2 when the load zone has 1000-4001 VUs
  • Tier 3 when the load zone has 4001 VUs

Regardless of the tier, the amount of resources (CPU, Memory, Network) per VU is the same. For example, if you start a test with 900VUs, k6 uses 3x Tier 1 servers, meaning that the traffic generated from our service comes from 3 IPs.

If you start a test with 1000VUs in a single load zone, k6 uses 1x Tier 2 server. If the same test is started in 2 load zones, k6 would allocate 500VUs per load zone and use 4x Tier 1 servers.

These are defaults

If your tests have specific requirements, contact k6 support for a custom solution.