blob: c48e55b74fb2c01e0829a3eb25bb40b3413a88b0 [file] [log] [blame]
package terraform
import (
"fmt"
"log"
"github.com/hashicorp/terraform/internal/addrs"
"github.com/hashicorp/terraform/internal/plans"
"github.com/hashicorp/terraform/internal/states"
"github.com/hashicorp/terraform/internal/tfdiags"
)
// NodePlannableResourceInstanceOrphan represents a resource that is "applyable":
// it is ready to be applied and is represented by a diff.
type NodePlannableResourceInstanceOrphan struct {
*NodeAbstractResourceInstance
// skipRefresh indicates that we should skip refreshing individual instances
skipRefresh bool
// skipPlanChanges indicates we should skip trying to plan change actions
// for any instances.
skipPlanChanges bool
}
var (
_ GraphNodeModuleInstance = (*NodePlannableResourceInstanceOrphan)(nil)
_ GraphNodeReferenceable = (*NodePlannableResourceInstanceOrphan)(nil)
_ GraphNodeReferencer = (*NodePlannableResourceInstanceOrphan)(nil)
_ GraphNodeConfigResource = (*NodePlannableResourceInstanceOrphan)(nil)
_ GraphNodeResourceInstance = (*NodePlannableResourceInstanceOrphan)(nil)
_ GraphNodeAttachResourceConfig = (*NodePlannableResourceInstanceOrphan)(nil)
_ GraphNodeAttachResourceState = (*NodePlannableResourceInstanceOrphan)(nil)
_ GraphNodeExecutable = (*NodePlannableResourceInstanceOrphan)(nil)
_ GraphNodeProviderConsumer = (*NodePlannableResourceInstanceOrphan)(nil)
)
func (n *NodePlannableResourceInstanceOrphan) Name() string {
return n.ResourceInstanceAddr().String() + " (orphan)"
}
// GraphNodeExecutable
func (n *NodePlannableResourceInstanceOrphan) Execute(ctx EvalContext, op walkOperation) tfdiags.Diagnostics {
addr := n.ResourceInstanceAddr()
// Eval info is different depending on what kind of resource this is
switch addr.Resource.Resource.Mode {
case addrs.ManagedResourceMode:
return n.managedResourceExecute(ctx)
case addrs.DataResourceMode:
return n.dataResourceExecute(ctx)
default:
panic(fmt.Errorf("unsupported resource mode %s", n.Config.Mode))
}
}
func (n *NodePlannableResourceInstanceOrphan) ProvidedBy() (addr addrs.ProviderConfig, exact bool) {
if n.Addr.Resource.Resource.Mode == addrs.DataResourceMode {
// indicate that this node does not require a configured provider
return nil, true
}
return n.NodeAbstractResourceInstance.ProvidedBy()
}
func (n *NodePlannableResourceInstanceOrphan) dataResourceExecute(ctx EvalContext) tfdiags.Diagnostics {
// A data source that is no longer in the config is removed from the state
log.Printf("[TRACE] NodePlannableResourceInstanceOrphan: removing state object for %s", n.Addr)
// we need to update both the refresh state to refresh the current data
// source, and the working state for plan-time evaluations.
refreshState := ctx.RefreshState()
refreshState.SetResourceInstanceCurrent(n.Addr, nil, n.ResolvedProvider)
workingState := ctx.State()
workingState.SetResourceInstanceCurrent(n.Addr, nil, n.ResolvedProvider)
return nil
}
func (n *NodePlannableResourceInstanceOrphan) managedResourceExecute(ctx EvalContext) (diags tfdiags.Diagnostics) {
addr := n.ResourceInstanceAddr()
oldState, readDiags := n.readResourceInstanceState(ctx, addr)
diags = diags.Append(readDiags)
if diags.HasErrors() {
return diags
}
// Note any upgrades that readResourceInstanceState might've done in the
// prevRunState, so that it'll conform to current schema.
diags = diags.Append(n.writeResourceInstanceState(ctx, oldState, prevRunState))
if diags.HasErrors() {
return diags
}
// Also the refreshState, because that should still reflect schema upgrades
// even if not refreshing.
diags = diags.Append(n.writeResourceInstanceState(ctx, oldState, refreshState))
if diags.HasErrors() {
return diags
}
if !n.skipRefresh {
// Refresh this instance even though it is going to be destroyed, in
// order to catch missing resources. If this is a normal plan,
// providers expect a Read request to remove missing resources from the
// plan before apply, and may not handle a missing resource during
// Delete correctly. If this is a simple refresh, Terraform is
// expected to remove the missing resource from the state entirely
refreshedState, refreshDiags := n.refresh(ctx, states.NotDeposed, oldState)
diags = diags.Append(refreshDiags)
if diags.HasErrors() {
return diags
}
diags = diags.Append(n.writeResourceInstanceState(ctx, refreshedState, refreshState))
if diags.HasErrors() {
return diags
}
// If we refreshed then our subsequent planning should be in terms of
// the new object, not the original object.
oldState = refreshedState
}
// If we're skipping planning, all we need to do is write the state. If the
// refresh indicates the instance no longer exists, there is also nothing
// to plan because there is no longer any state and it doesn't exist in the
// config.
if n.skipPlanChanges || oldState == nil || oldState.Value.IsNull() {
return diags.Append(n.writeResourceInstanceState(ctx, oldState, workingState))
}
var change *plans.ResourceInstanceChange
change, destroyPlanDiags := n.planDestroy(ctx, oldState, "")
diags = diags.Append(destroyPlanDiags)
if diags.HasErrors() {
return diags
}
diags = diags.Append(n.checkPreventDestroy(change))
if diags.HasErrors() {
return diags
}
// We might be able to offer an approximate reason for why we are
// planning to delete this object. (This is best-effort; we might
// sometimes not have a reason.)
change.ActionReason = n.deleteActionReason(ctx)
diags = diags.Append(n.writeChange(ctx, change, ""))
if diags.HasErrors() {
return diags
}
return diags.Append(n.writeResourceInstanceState(ctx, nil, workingState))
}
func (n *NodePlannableResourceInstanceOrphan) deleteActionReason(ctx EvalContext) plans.ResourceInstanceChangeActionReason {
cfg := n.Config
if cfg == nil {
if !n.Addr.Equal(n.prevRunAddr(ctx)) {
// This means the resource was moved - see also
// ResourceInstanceChange.Moved() which calculates
// this the same way.
return plans.ResourceInstanceDeleteBecauseNoMoveTarget
}
return plans.ResourceInstanceDeleteBecauseNoResourceConfig
}
// If this is a resource instance inside a module instance that's no
// longer declared then we will have a config (because config isn't
// instance-specific) but the expander will know that our resource
// address's module path refers to an undeclared module instance.
if expander := ctx.InstanceExpander(); expander != nil { // (sometimes nil in MockEvalContext in tests)
validModuleAddr := expander.GetDeepestExistingModuleInstance(n.Addr.Module)
if len(validModuleAddr) != len(n.Addr.Module) {
// If we get here then at least one step in the resource's module
// path is to a module instance that doesn't exist at all, and
// so a missing module instance is the delete reason regardless
// of whether there might _also_ be a change to the resource
// configuration inside the module. (Conceptually the configurations
// inside the non-existing module instance don't exist at all,
// but they end up existing just as an artifact of the
// implementation detail that we detect module instance orphans
// only dynamically.)
return plans.ResourceInstanceDeleteBecauseNoModule
}
}
switch n.Addr.Resource.Key.(type) {
case nil: // no instance key at all
if cfg.Count != nil || cfg.ForEach != nil {
return plans.ResourceInstanceDeleteBecauseWrongRepetition
}
case addrs.IntKey:
if cfg.Count == nil {
// This resource isn't using "count" at all, then
return plans.ResourceInstanceDeleteBecauseWrongRepetition
}
expander := ctx.InstanceExpander()
if expander == nil {
break // only for tests that produce an incomplete MockEvalContext
}
insts := expander.ExpandResource(n.Addr.ContainingResource())
declared := false
for _, inst := range insts {
if n.Addr.Equal(inst) {
declared = true
}
}
if !declared {
// This instance key is outside of the configured range
return plans.ResourceInstanceDeleteBecauseCountIndex
}
case addrs.StringKey:
if cfg.ForEach == nil {
// This resource isn't using "for_each" at all, then
return plans.ResourceInstanceDeleteBecauseWrongRepetition
}
expander := ctx.InstanceExpander()
if expander == nil {
break // only for tests that produce an incomplete MockEvalContext
}
insts := expander.ExpandResource(n.Addr.ContainingResource())
declared := false
for _, inst := range insts {
if n.Addr.Equal(inst) {
declared = true
}
}
if !declared {
// This instance key is outside of the configured range
return plans.ResourceInstanceDeleteBecauseEachKey
}
}
// If we get here then the instance key type matches the configured
// repetition mode, and so we need to consider whether the key itself
// is within the range of the repetition construct.
if expander := ctx.InstanceExpander(); expander != nil { // (sometimes nil in MockEvalContext in tests)
// First we'll check whether our containing module instance still
// exists, so we can talk about that differently in the reason.
declared := false
for _, inst := range expander.ExpandModule(n.Addr.Module.Module()) {
if n.Addr.Module.Equal(inst) {
declared = true
break
}
}
if !declared {
return plans.ResourceInstanceDeleteBecauseNoModule
}
// Now we've proven that we're in a still-existing module instance,
// we'll see if our instance key matches something actually declared.
declared = false
for _, inst := range expander.ExpandResource(n.Addr.ContainingResource()) {
if n.Addr.Equal(inst) {
declared = true
break
}
}
if !declared {
// Because we already checked that the key _type_ was correct
// above, we can assume that any mismatch here is a range error,
// and thus we just need to decide which of the two range
// errors we're going to return.
switch n.Addr.Resource.Key.(type) {
case addrs.IntKey:
return plans.ResourceInstanceDeleteBecauseCountIndex
case addrs.StringKey:
return plans.ResourceInstanceDeleteBecauseEachKey
}
}
}
// If we didn't find any specific reason to report, we'll report "no reason"
// as a fallback, which means the UI should just state it'll be deleted
// without any explicit reasoning.
return plans.ResourceInstanceChangeNoReason
}