The`runtimeEnvironment` selects the cluster that will execute the pipeline (mostly useful for organizations using the[Codefresh Runner]({{site.baseurl}}/docs/installation/codefresh-runner/))

The`runtimeEnvironment` selects the cluster that will execute the pipeline (mostly useful for organizations using the[Codefresh Runner]({{site.baseurl}}/docs/installation/runner/install-codefresh-runner/)).

{: .table .table-bordered .table-hover}

| Field name| Parent field| Type| Value|

Tunnel-based runtimes use tunneling for communication between the customer cluster and the Codefresh platform, with the customer cluster initiating the tunneling request. Simply add the flag`--access-mode` with`tunnel` as the value and you have your tunnel-based runtime without an ingress controller.

See:

*[Tunnel-based runtime architecture]({{site.baseurl}}/docs/installation/runtime-architecture/#gitops-runtime-architecture)

*[Tunnel-based runtime architecture]({{site.baseurl}}/docs/installation/gitops/runtime-architecture/)

*[Runtime flags]({{site.baseurl}}/docs/installation/gitops/hybrid-gitops/#runtime-flags)

*[Tunnel-based runtime flags]({{site.baseurl}}/docs/installation/gitops/hybrid-gitops/#tunnel-based-runtime-flags)