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node_resource_destroy.go
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/
node_resource_destroy.go
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package terraform
import (
"fmt"
"log"
"github.com/hashicorp/terraform/internal/instances"
"github.com/hashicorp/terraform/internal/plans"
"github.com/hashicorp/terraform/internal/tfdiags"
"github.com/hashicorp/terraform/internal/addrs"
"github.com/hashicorp/terraform/internal/configs"
"github.com/hashicorp/terraform/internal/states"
)
// NodeDestroyResourceInstance represents a resource instance that is to be
// destroyed.
type NodeDestroyResourceInstance struct {
*NodeAbstractResourceInstance
// If DeposedKey is set to anything other than states.NotDeposed then
// this node destroys a deposed object of the associated instance
// rather than its current object.
DeposedKey states.DeposedKey
}
var (
_ GraphNodeModuleInstance = (*NodeDestroyResourceInstance)(nil)
_ GraphNodeConfigResource = (*NodeDestroyResourceInstance)(nil)
_ GraphNodeResourceInstance = (*NodeDestroyResourceInstance)(nil)
_ GraphNodeDestroyer = (*NodeDestroyResourceInstance)(nil)
_ GraphNodeDestroyerCBD = (*NodeDestroyResourceInstance)(nil)
_ GraphNodeReferenceable = (*NodeDestroyResourceInstance)(nil)
_ GraphNodeReferencer = (*NodeDestroyResourceInstance)(nil)
_ GraphNodeExecutable = (*NodeDestroyResourceInstance)(nil)
_ GraphNodeProviderConsumer = (*NodeDestroyResourceInstance)(nil)
_ GraphNodeProvisionerConsumer = (*NodeDestroyResourceInstance)(nil)
)
func (n *NodeDestroyResourceInstance) Name() string {
if n.DeposedKey != states.NotDeposed {
return fmt.Sprintf("%s (destroy deposed %s)", n.ResourceInstanceAddr(), n.DeposedKey)
}
return n.ResourceInstanceAddr().String() + " (destroy)"
}
func (n *NodeDestroyResourceInstance) 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()
}
// GraphNodeDestroyer
func (n *NodeDestroyResourceInstance) DestroyAddr() *addrs.AbsResourceInstance {
addr := n.ResourceInstanceAddr()
return &addr
}
// GraphNodeDestroyerCBD
func (n *NodeDestroyResourceInstance) CreateBeforeDestroy() bool {
// State takes precedence during destroy.
// If the resource was removed, there is no config to check.
// If CBD was forced from descendent, it should be saved in the state
// already.
if s := n.instanceState; s != nil {
if s.Current != nil {
return s.Current.CreateBeforeDestroy
}
}
if n.Config != nil && n.Config.Managed != nil {
return n.Config.Managed.CreateBeforeDestroy
}
return false
}
// GraphNodeDestroyerCBD
func (n *NodeDestroyResourceInstance) ModifyCreateBeforeDestroy(v bool) error {
return nil
}
// GraphNodeReferenceable, overriding NodeAbstractResource
func (n *NodeDestroyResourceInstance) ReferenceableAddrs() []addrs.Referenceable {
normalAddrs := n.NodeAbstractResourceInstance.ReferenceableAddrs()
destroyAddrs := make([]addrs.Referenceable, len(normalAddrs))
phaseType := addrs.ResourceInstancePhaseDestroy
if n.CreateBeforeDestroy() {
phaseType = addrs.ResourceInstancePhaseDestroyCBD
}
for i, normalAddr := range normalAddrs {
switch ta := normalAddr.(type) {
case addrs.Resource:
destroyAddrs[i] = ta.Phase(phaseType)
case addrs.ResourceInstance:
destroyAddrs[i] = ta.Phase(phaseType)
default:
destroyAddrs[i] = normalAddr
}
}
return destroyAddrs
}
// GraphNodeReferencer, overriding NodeAbstractResource
func (n *NodeDestroyResourceInstance) References() []*addrs.Reference {
// If we have a config, then we need to include destroy-time dependencies
if c := n.Config; c != nil && c.Managed != nil {
var result []*addrs.Reference
// We include conn info and config for destroy time provisioners
// as dependencies that we have.
for _, p := range c.Managed.Provisioners {
schema := n.ProvisionerSchemas[p.Type]
if p.When == configs.ProvisionerWhenDestroy {
if p.Connection != nil {
result = append(result, ReferencesFromConfig(p.Connection.Config, connectionBlockSupersetSchema)...)
}
result = append(result, ReferencesFromConfig(p.Config, schema)...)
}
}
return result
}
return nil
}
// GraphNodeExecutable
func (n *NodeDestroyResourceInstance) Execute(ctx EvalContext, op walkOperation) (diags 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 *NodeDestroyResourceInstance) managedResourceExecute(ctx EvalContext) (diags tfdiags.Diagnostics) {
addr := n.ResourceInstanceAddr()
// Get our state
is := n.instanceState
if is == nil {
log.Printf("[WARN] NodeDestroyResourceInstance for %s with no state", addr)
}
// These vars are updated through pointers at various stages below.
var changeApply *plans.ResourceInstanceChange
var state *states.ResourceInstanceObject
_, providerSchema, err := getProvider(ctx, n.ResolvedProvider)
diags = diags.Append(err)
if diags.HasErrors() {
return diags
}
changeApply, err = n.readDiff(ctx, providerSchema)
diags = diags.Append(err)
if changeApply == nil || diags.HasErrors() {
return diags
}
changeApply = reducePlan(addr.Resource, changeApply, true)
// reducePlan may have simplified our planned change
// into a NoOp if it does not require destroying.
if changeApply == nil || changeApply.Action == plans.NoOp {
return diags
}
state, readDiags := n.readResourceInstanceState(ctx, addr)
diags = diags.Append(readDiags)
if diags.HasErrors() {
return diags
}
// Exit early if the state object is null after reading the state
if state == nil || state.Value.IsNull() {
return diags
}
diags = diags.Append(n.preApplyHook(ctx, changeApply))
if diags.HasErrors() {
return diags
}
// Run destroy provisioners if not tainted
if state.Status != states.ObjectTainted {
applyProvisionersDiags := n.evalApplyProvisioners(ctx, state, false, configs.ProvisionerWhenDestroy)
diags = diags.Append(applyProvisionersDiags)
// keep the diags separate from the main set until we handle the cleanup
if diags.HasErrors() {
// If we have a provisioning error, then we just call
// the post-apply hook now.
diags = diags.Append(n.postApplyHook(ctx, state, diags.Err()))
return diags
}
}
// Managed resources need to be destroyed, while data sources
// are only removed from state.
// we pass a nil configuration to apply because we are destroying
s, d := n.apply(ctx, state, changeApply, nil, instances.RepetitionData{}, false)
state, diags = s, diags.Append(d)
// we don't return immediately here on error, so that the state can be
// finalized
err = n.writeResourceInstanceState(ctx, state, workingState)
if err != nil {
return diags.Append(err)
}
// create the err value for postApplyHook
diags = diags.Append(n.postApplyHook(ctx, state, diags.Err()))
diags = diags.Append(updateStateHook(ctx))
return diags
}
func (n *NodeDestroyResourceInstance) dataResourceExecute(ctx EvalContext) (diags tfdiags.Diagnostics) {
log.Printf("[TRACE] NodeDestroyResourceInstance: removing state object for %s", n.Addr)
ctx.State().SetResourceInstanceCurrent(n.Addr, nil, n.ResolvedProvider)
return diags.Append(updateStateHook(ctx))
}