This was mostly unused now, since we no longer needed to interrupt a
series of eval node executions.
The exception was the stopHook, which is still used to halt execution
when there's an interrupt. Since interrupting execution should not
complete successfully, we use a normal opaque error to halt everything,
and return it to the UI.
We can work on coalescing or hiding these if necessary in a separate PR.
Outputs were not being evaluated during import, because it was not added
to the walk filter.
Remove any unnecessary walk filters from all the Execute nodes.
* Split node_resource_abstract.go into two files, putting
NodeAbstractResourceInstance methods in their own file - it was getting
large enough to be tricky for (my) human eyeballs.
* un-exported the functions that were created as part of the EvalTree()
refactor; they did not need to be public.
function
The original EvalReadState node is used only by `NodeAbstractResource`s,
so I've created a new method on NodeAbstractResource which does the same
thing as EvalReadState. When the EvalNode refactor project is complete,
EvalReadState will be removed entirely.
* terraform: remove unused eval node
* add UpdateStateHook function to replace EvalUpdateStateHook
* early exit error isn't
* terraform: NodeDestroyResourceInstance refactor
This PR refactor's NodeDestroyResourceInstance EvalTree() into an
Execute() node. EvalRequireState and evalWriteEmptyState were used only
by this node, and they have been removed in favor of straight code.
There are still many calls to someEvalNode.Eval() in NodeDestroyResourceInstance: I plan on refactoring the remaining EvalTree()s before tacking those Eval()s (all of which are used by many graph nodes)
I've added a new function, UpdateStateHook, that is effectively the same
as EvalUpdateStateHook. The latter will be removed when the larger
EvalNode refactor project is complete.
Remove the check for CreateBeforeDestroyOverride which can't happen in a
destroy node.
Remove the unnecessary GraphNodeAttachDestroyer interface, since we
don't use it now that plans can record the create+destroy order.
The AbstractResourceInstance type was storing the entire Resource from
the state, when it only needs the actual instance state. This would
cause resources to consume memory on the order of n^2, where n in the
number of instances of the resource.
Rather than attaching the entire resource state, which includes copying
each individual instance, only attach the ResourceInstance state, and
extract out the provider address from the Resource.
Replace the graphNodeRoot for the main graph with a nodeCloseModule for
the root module. USe a new transformer as well, so as to not change any
behavior of DynamicExpand graphs.
Closing out the root module like we do with sub modules means we no
longer need the OrphanResourceTransformer, or the NodeDestroyResource.
The old resource destroy logic has mostly moved into the instance nodes,
and the remaining resource node was just for cleanup, which need to be
done again by the module since there isn't always a NodeDestroyResource
to be evaluated.
The more-correct state caused a few tests to fail, which need to be
cleaned up to match the state without empty resource husks.
NodeDestroyResource does not require a provider, and to avoid this a
temporary GraphNodeNoProvider was used to differentiate it from other
resource nodes. We can now de-couple the destroy node from the abstract
resource which was adding the ProvidedBy method, and remove the
NoProvider method.
Use the new addrs type here.
Also remove the uniqueMap from the config transformer. We enforce
uniqueness during config loading, and this is more likely to have false
positives due to stringification than anything.
Make the interface name reflect the new return type of the method.
Remove the confusingly named and unused ResourceAddress method from the
resource nodes as well.
Remove the requirement for most *Resource types to be a
GraphNodeModuleInstance, ensuring that they never call ctx.Path while
being evaluated. This gets rid of most of the direct need for the Path
method currently implemented by NodeResourceAbstract, leaving the
provider and schema related calls for a subsequent PR.
Implement a new provider_meta block in the terraform block of modules, allowing provider-keyed metadata to be communicated from HCL to provider binaries.
Bundled in this change for minimal protocol version bumping is the addition of markdown support for attribute descriptions and the ability to indicate when an attribute is deprecated, so this information can be shown in the schema dump.
Co-authored-by: Paul Tyng <paul@paultyng.net>
If the resource was stored as CreateBeforeDestroy, use the same ordering
regardless.
This reversal will be taken care if more cleanly in state-only destroys,
and with less risk. Don't use this commit as-is.
While the NodeDestroyResource type should not be a
GraphNodeProviderConsumer, we're going to avoid uncovering more hidden
behavior by explicitly skipping provider creation and connections in the
provider transformers.
This should be removed when more in-depth testing can be done during a
major release cycle.
The change in #23696 removed the NodeAbstractResource methods from the
NodeDestroyResource type, in order to prevent other resource behaviors,
like requesting a provider.
While this node type is not directly referenced, it was implicitly
ordered against the module cleanup by virtue of being a resource node.
Since there's no good entry point to test this ordering at the moment,
The resource cleanup node does not need a provider. We can't directly
remove the ProvidedBy method, but this node only needs to be eval-able
so we can remove all the NodeAbstractResource methods at once.
We previously had mechanisms to clean up only individual instance states,
leaving behind empty resource husks in the state after they were all
destroyed.
This takes care of it in the "orphan" case. It does not yet do it in the
"terraform destroy" or "terraform plan -destroy" cases because we don't
have anywhere to record in the plan that we're actually destroying and so
the resource configurations should be ignored and _everything_ should be
cleaned. We'll let the state be not-quite-empty in that case for now,
since it doesn't really hurt; cleaning up orphans is the main case because
the state will live on afterwards and so leftover cruft will accumulate
over the course of many changes.
Previously our handling of create_before_destroy -- and of deposed objects
in particular -- was rather "implicit" and spread over various different
subsystems. We'd quietly just destroy every deposed object during a
destroy operation, without any user-visible plan to do so.
Here we make things more explicit by tracking each deposed object
individually by its pseudorandomly-allocated key. There are two different
mechanisms at play here, building on the same concepts:
- During a replace operation with create_before_destroy, we *pre-allocate*
a DeposedKey to use for the prior object in the "apply" node and then
pass that exact id to the destroy node, ensuring that we only destroy
the single object we planned to destroy. In the happy path here the
user never actually sees the allocated deposed key because we use it and
then immediately destroy it within the same operation. However, that
destroy may fail, which brings us to the second mechanism:
- If any deposed objects are already present in state during _plan_, we
insert a destroy change for them into the plan so that it's explicit to
the user that we are going to destroy these additional objects, and then
create an individual graph node for each one in DiffTransformer.
The main motivation here is to be more careful in how we handle these
destroys so that from a user's standpoint we never destroy something
without the user knowing about it ahead of time.
However, this new organization also hopefully makes the code itself a
little easier to follow because the connection between the create and
destroy steps of a Replace is reprseented in a single place (in
DiffTransformer) and deposed instances each have their own explicit graph
node rather than being secretly handled as part of the main instance-level
graph node.
Since we do our deletes using a separate graph node from all of the other
actions, and a "Replace" change implies both a delete _and_ a create, we
need to pretend at apply time that a single replace change was actually
two separate changes.
This will also early-exit eval if a destroy node finds a non-Delete change
or if an apply node finds a Delete change. These should not happen in
practice because we leave these nodes out of the graph when they are not
needed for the given action, but we do this here for robustness so as not
to have an invisible dependency between the graph builder and the eval
phase.
This also includes passing in the provider schema to a few more EvalNodes
that were expecting it but not getting it, in order to be able to
successfully test the implementation of EvalReadDiff here.
Chaange ResourceProvider to providers.Interface starting from the
context, and fix all type errors.
This only replaced some of method calls directly applicable to the
providers themselves. The resource methods will follow.
Due to how often the state and plan types are referenced throughout
Terraform, there isn't a great way to switch them out gradually. As a
consequence, this huge commit gets us from the old world to a _compilable_
new world, but still has a large number of known test failures due to
key functionality being stubbed out.
The stubs here are for anything that interacts with providers, since we
now need to do the follow-up work to similarly replace the old
terraform.ResourceProvider interface with its replacement in the new
"providers" package. That work, along with work to fix the remaining
failing tests, will follow in subsequent commits.
The aim here was to replace all references to terraform.State and its
downstream types with states.State, terraform.Plan with plans.Plan,
state.State with statemgr.State, and switch to the new implementations of
the state and plan file formats. However, due to the number of times those
types are used, this also ended up affecting numerous other parts of core
such as terraform.Hook, the backend.Backend interface, and most of the CLI
commands.
Just as with 5861dbf3fc49b19587a31816eb06f511ab861bb4 before, I apologize
in advance to the person who inevitably just found this huge commit while
spelunking through the commit history.
Prior to the introduction of our "addrs" package, we represented destroy
nodes as a special kind of address string ending in ".destroy" or
".destroy-cbd".
Using references to resolve these dependencies is a strange idea to begin
with, since these are not user-visible addresses, but rather than refactor
that now we instead have these weird pseudo-address types ResourcePhase
and ResourceInstancePhase that correspond go those weird address suffixes,
thus restoring the prior behavior.
In future we should rework this so that destroy node edges are not handled
as references at all, and instead handled as part of
DestroyEdgeTransformer where there's better context for implementing this
logic and it can be maintained and tested in a single place.
Destroy nodes were being referenced by their regular paths, which was
causing cycles in the graphs. Destroy nodes can't be referenced directly
in any way, so override the inherited method for a referenceable address.
These are all things that ought to be present in normal use but can end up
being nil in incorrect tests. Test debugging is simpler if these things
return errors gracefully, rather than crashing.
Due to how deeply the configuration types go into Terraform Core, there
isn't a great way to switch out to HCL2 gradually. As a consequence, this
huge commit gets us from the old state to a _compilable_ new state, but
does not yet attempt to fix any tests and has a number of known missing
parts and bugs. We will continue to iterate on this in forthcoming
commits, heading back towards passing tests and making Terraform
fully-functional again.
The three main goals here are:
- Use the configuration models from the "configs" package instead of the
older models in the "config" package, which is now deprecated and
preserved only to help us write our migration tool.
- Do expression inspection and evaluation using the functionality of the
new "lang" package, instead of the Interpolator type and related
functionality in the main "terraform" package.
- Represent addresses of various objects using types in the addrs package,
rather than hand-constructed strings. This is not critical to support
the above, but was a big help during the implementation of these other
points since it made it much more explicit what kind of address is
expected in each context.
Since our new packages are built to accommodate some future planned
features that are not yet implemented (e.g. the "for_each" argument on
resources, "count"/"for_each" on modules), and since there's still a fair
amount of functionality still using old-style APIs, there is a moderate
amount of shimming here to connect new assumptions with old, hopefully in
a way that makes it easier to find and eliminate these shims later.
I apologize in advance to the person who inevitably just found this huge
commit while spelunking through the commit history.
Use the ResourceState.Provider field to store the full name of the
provider used during apply. This field is only used when a resource is
removed from the config, and will allow that resource to be removed by
the exact same provider with which it was created.
Modify the locations which might accept the alue of the
ResourceState.Provider field to detect that the name is resolved.
This turned out to be a big messy commit, since the way providers are
referenced is tightly coupled throughout the code. That starts to unify
how providers are referenced, using the format output node Name method.
Add a new field to the internal resource data types called
ResolvedProvider. This is set by a new setter method SetProvider when a
resource is connected to a provider during graph creation. This allows
us to later lookup the provider instance a resource is connected to,
without requiring it to have the same module path.
The InitProvider context method now takes 2 arguments, one if the
provider type and the second is the full name of the provider. While the
provider type could still be parsed from the full name, this makes it
more explicit and, and changes to the name format won't effect this
code.
Fixes#10338
The destruction step for a resource was included the deposed resources
for _all_ resources with that name (ignoring the "index"). For example:
`aws_instance.foo.0` was including destroying deposed for
`aws_instance.foo.1`.
This changes the config to the deposed transformer to properly include
that index.
This change includes a larger change of changing `stateId` to include
the index. This affected more parts but was ultimately the issue in
question.
