The Resource provider Meta-Argument
The provider
meta-argument specifies which provider configuration to use for a resource,
overriding Terraform's default behavior of selecting one based on the resource
type name. Its value should be an unquoted <PROVIDER>.<ALIAS>
reference.
As described in Provider Configuration, you can optionally create multiple configurations for a single provider (usually to manage resources in different regions of multi-region services). Each provider can have one default configuration, and any number of alternate configurations that include an extra name segment (or "alias").
By default, Terraform interprets the initial word in the resource type name
(separated by underscores) as the local name of a provider, and uses that
provider's default configuration. For example, the resource type
google_compute_instance
is associated automatically with the default
configuration for the provider named google
.
By using the provider
meta-argument, you can select an alternate provider
configuration for a resource:
A resource always has an implicit dependency on its associated provider, to ensure that the provider is fully configured before any resource actions are taken.
The provider
meta-argument expects
a <PROVIDER>.<ALIAS>
reference,
which does not need to be quoted. Arbitrary expressions are not permitted for
provider
because it must be resolved while Terraform is constructing the
dependency graph, before it is safe to evaluate expressions.