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Multiple executor example

This example uses networking, docker-mirror, and executors submodules that provision a network, a Docker registry mirror, and sets of resources running one or more types of executors.

The following variables must be supplied:

  • sourcegraph_external_url, sourcegraph_executor_proxy_password, queue_name, metrics_environment_label, and instance_tag: Analogous to the executor_* variables in the single-executor example.
  • resource_prefix: A prefix unique to each set of compute resources. This prevents collisions between two uses of the executors module. We recommend this value be constructed the same way instance_tag is constructed.
  • docker_registry_mirror: This variable is given the value "http://${module.docker-mirror.ip_address}:5000", which converts the raw external IP address to an address resolvable by the executor instances.

If your deployment environment already has a Docker registry that can be used, only the executor submodule must be used (and references to the networking and docker-mirror modules can be dropped). The Docker registry mirror address can be supplied along with its containing VPC and subnet as pre-existing identifier literals.

All of these module's variables are defined in modules/networking/variables.tf, modules/docker-mirror/variables.tf, and modules/executors/variables.tf.