benchmarks: Add SETUP parameter to use Kubernetes
Gitaly benchnmarks allow to run a set of benchmarks against a Gitaly server and to monitor those benchmarks to extract results that can later be analyzed.
Currently, benchmarks are always run against a Gitaly instance running on VMs. Whith Gitaly on Kubernetes soon to be officialy supported, there is a need to benchmark Gitaly running on Kubernetes.
This commit adds the necessary logic to create a Kubernetes cluster on which Gitaly could run. A new parameter called SETUP is introduced, which can take two values: vm or `kubernetes'.
When kubernetes is used, a Kubernetes cluster is created instead of standalone virtual machines.
When vm is used, the current setup is deployed as is.
Example:
EXPERIMENT=master SETUP=kubernetes ./create-benchmark-instanceWhen SETUP is not used, it defaults to vm, which is the current default.
Upcoming MRs will introduces changes to configure the cluster to run Gitaly in a Pod. This MR only adds the necessary changes to create the cluster, not to run anything on it.
References: