All Testground runners except for the
local:exec runner have two networks: a
control and a
Test plan instances communicate with each other over the
Test plan instances communicate with infrastructure services such as the sync service and InfluxDB over the
control network is used to be communicate with Testground services, such as the sync service or InfluxDB. You don't need to do anything special to configure or use this network: the sidecar will do it for you automatically.
After the sidecar is finished initializing the network, it should be impossible to use the
control network to communicate with other test plan instances.
However, a good test plan should avoid listening on and/or announcing the
control network anyways to ensure that it doesn't interfere with the test. Your test plan should always communicate with other test instances via the data network.
data network, used for communication between test plan instances, will be assigned a
B block in the IP range
220.127.116.11/4. Given the B block
X.Y.0.1 is always the gateway and shouldn't be used by the test.
The subnet used will be passed to the test instance via the runtime environment (as