mirror of
https://github.com/opentofu/opentofu.git
synced 2024-12-28 01:41:48 -06:00
427 lines
12 KiB
Go
427 lines
12 KiB
Go
package terraform
|
|
|
|
import (
|
|
"fmt"
|
|
|
|
"github.com/zclconf/go-cty/cty"
|
|
|
|
"github.com/hashicorp/terraform/addrs"
|
|
"github.com/hashicorp/terraform/configs"
|
|
"github.com/hashicorp/terraform/plans"
|
|
"github.com/hashicorp/terraform/providers"
|
|
"github.com/hashicorp/terraform/states"
|
|
"github.com/hashicorp/terraform/tfdiags"
|
|
)
|
|
|
|
// NodeApplyableResourceInstance represents a resource instance that is
|
|
// "applyable": it is ready to be applied and is represented by a diff.
|
|
//
|
|
// This node is for a specific instance of a resource. It will usually be
|
|
// accompanied in the graph by a NodeApplyableResource representing its
|
|
// containing resource, and should depend on that node to ensure that the
|
|
// state is properly prepared to receive changes to instances.
|
|
type NodeApplyableResourceInstance struct {
|
|
*NodeAbstractResourceInstance
|
|
|
|
destroyNode GraphNodeDestroyerCBD
|
|
graphNodeDeposer // implementation of GraphNodeDeposer
|
|
}
|
|
|
|
var (
|
|
_ GraphNodeResource = (*NodeApplyableResourceInstance)(nil)
|
|
_ GraphNodeResourceInstance = (*NodeApplyableResourceInstance)(nil)
|
|
_ GraphNodeCreator = (*NodeApplyableResourceInstance)(nil)
|
|
_ GraphNodeReferencer = (*NodeApplyableResourceInstance)(nil)
|
|
_ GraphNodeDeposer = (*NodeApplyableResourceInstance)(nil)
|
|
_ GraphNodeEvalable = (*NodeApplyableResourceInstance)(nil)
|
|
)
|
|
|
|
// GraphNodeAttachDestroyer
|
|
func (n *NodeApplyableResourceInstance) AttachDestroyNode(d GraphNodeDestroyerCBD) {
|
|
n.destroyNode = d
|
|
}
|
|
|
|
// createBeforeDestroy checks this nodes config status and the status af any
|
|
// companion destroy node for CreateBeforeDestroy.
|
|
func (n *NodeApplyableResourceInstance) createBeforeDestroy() bool {
|
|
cbd := false
|
|
|
|
if n.Config != nil && n.Config.Managed != nil {
|
|
cbd = n.Config.Managed.CreateBeforeDestroy
|
|
}
|
|
|
|
if n.destroyNode != nil {
|
|
cbd = cbd || n.destroyNode.CreateBeforeDestroy()
|
|
}
|
|
|
|
return cbd
|
|
}
|
|
|
|
// GraphNodeCreator
|
|
func (n *NodeApplyableResourceInstance) CreateAddr() *addrs.AbsResourceInstance {
|
|
addr := n.ResourceInstanceAddr()
|
|
return &addr
|
|
}
|
|
|
|
// GraphNodeReferencer, overriding NodeAbstractResourceInstance
|
|
func (n *NodeApplyableResourceInstance) References() []*addrs.Reference {
|
|
// Start with the usual resource instance implementation
|
|
ret := n.NodeAbstractResourceInstance.References()
|
|
|
|
// Applying a resource must also depend on the destruction of any of its
|
|
// dependencies, since this may for example affect the outcome of
|
|
// evaluating an entire list of resources with "count" set (by reducing
|
|
// the count).
|
|
//
|
|
// However, we can't do this in create_before_destroy mode because that
|
|
// would create a dependency cycle. We make a compromise here of requiring
|
|
// changes to be updated across two applies in this case, since the first
|
|
// plan will use the old values.
|
|
if !n.createBeforeDestroy() {
|
|
for _, ref := range ret {
|
|
switch tr := ref.Subject.(type) {
|
|
case addrs.ResourceInstance:
|
|
newRef := *ref // shallow copy so we can mutate
|
|
newRef.Subject = tr.Phase(addrs.ResourceInstancePhaseDestroy)
|
|
newRef.Remaining = nil // can't access attributes of something being destroyed
|
|
ret = append(ret, &newRef)
|
|
case addrs.Resource:
|
|
newRef := *ref // shallow copy so we can mutate
|
|
newRef.Subject = tr.Phase(addrs.ResourceInstancePhaseDestroy)
|
|
newRef.Remaining = nil // can't access attributes of something being destroyed
|
|
ret = append(ret, &newRef)
|
|
}
|
|
}
|
|
}
|
|
|
|
return ret
|
|
}
|
|
|
|
// GraphNodeEvalable
|
|
func (n *NodeApplyableResourceInstance) EvalTree() EvalNode {
|
|
addr := n.ResourceInstanceAddr()
|
|
|
|
if n.Config == nil {
|
|
// This should not be possible, but we've got here in at least one
|
|
// case as discussed in the following issue:
|
|
// https://github.com/hashicorp/terraform/issues/21258
|
|
// To avoid an outright crash here, we'll instead return an explicit
|
|
// error.
|
|
var diags tfdiags.Diagnostics
|
|
diags = diags.Append(tfdiags.Sourceless(
|
|
tfdiags.Error,
|
|
"Resource node has no configuration attached",
|
|
fmt.Sprintf(
|
|
"The graph node for %s has no configuration attached to it. This suggests a bug in Terraform's apply graph builder; please report it!",
|
|
addr,
|
|
),
|
|
))
|
|
err := diags.Err()
|
|
return &EvalReturnError{
|
|
Error: &err,
|
|
}
|
|
}
|
|
|
|
// Eval info is different depending on what kind of resource this is
|
|
switch n.Config.Mode {
|
|
case addrs.ManagedResourceMode:
|
|
return n.evalTreeManagedResource(addr)
|
|
case addrs.DataResourceMode:
|
|
return n.evalTreeDataResource(addr)
|
|
default:
|
|
panic(fmt.Errorf("unsupported resource mode %s", n.Config.Mode))
|
|
}
|
|
}
|
|
|
|
func (n *NodeApplyableResourceInstance) evalTreeDataResource(addr addrs.AbsResourceInstance) EvalNode {
|
|
var provider providers.Interface
|
|
var providerSchema *ProviderSchema
|
|
var change *plans.ResourceInstanceChange
|
|
var state *states.ResourceInstanceObject
|
|
|
|
return &EvalSequence{
|
|
Nodes: []EvalNode{
|
|
&EvalGetProvider{
|
|
Addr: n.ResolvedProvider,
|
|
Output: &provider,
|
|
Schema: &providerSchema,
|
|
},
|
|
|
|
// Get the saved diff for apply
|
|
&EvalReadDiff{
|
|
Addr: addr.Resource,
|
|
ProviderSchema: &providerSchema,
|
|
Change: &change,
|
|
},
|
|
|
|
// Stop early if we don't actually have a diff
|
|
&EvalIf{
|
|
If: func(ctx EvalContext) (bool, error) {
|
|
if change == nil {
|
|
return true, EvalEarlyExitError{}
|
|
}
|
|
return true, nil
|
|
},
|
|
Then: EvalNoop{},
|
|
},
|
|
|
|
// In this particular call to EvalReadData we include our planned
|
|
// change, which signals that we expect this read to complete fully
|
|
// with no unknown values; it'll produce an error if not.
|
|
&EvalReadData{
|
|
Addr: addr.Resource,
|
|
Config: n.Config,
|
|
Dependencies: n.StateReferences(),
|
|
Planned: &change, // setting this indicates that the result must be complete
|
|
Provider: &provider,
|
|
ProviderAddr: n.ResolvedProvider,
|
|
ProviderSchema: &providerSchema,
|
|
OutputState: &state,
|
|
},
|
|
|
|
&EvalWriteState{
|
|
Addr: addr.Resource,
|
|
ProviderAddr: n.ResolvedProvider,
|
|
ProviderSchema: &providerSchema,
|
|
State: &state,
|
|
},
|
|
|
|
// Clear the diff now that we've applied it, so
|
|
// later nodes won't see a diff that's now a no-op.
|
|
&EvalWriteDiff{
|
|
Addr: addr.Resource,
|
|
ProviderSchema: &providerSchema,
|
|
Change: nil,
|
|
},
|
|
|
|
&EvalUpdateStateHook{},
|
|
},
|
|
}
|
|
}
|
|
|
|
func (n *NodeApplyableResourceInstance) evalTreeManagedResource(addr addrs.AbsResourceInstance) EvalNode {
|
|
// Declare a bunch of variables that are used for state during
|
|
// evaluation. Most of this are written to by-address below.
|
|
var provider providers.Interface
|
|
var providerSchema *ProviderSchema
|
|
var diff, diffApply *plans.ResourceInstanceChange
|
|
var state *states.ResourceInstanceObject
|
|
var err error
|
|
var createNew bool
|
|
var createBeforeDestroyEnabled bool
|
|
var configVal cty.Value
|
|
var deposedKey states.DeposedKey
|
|
|
|
return &EvalSequence{
|
|
Nodes: []EvalNode{
|
|
&EvalGetProvider{
|
|
Addr: n.ResolvedProvider,
|
|
Output: &provider,
|
|
Schema: &providerSchema,
|
|
},
|
|
|
|
// Get the saved diff for apply
|
|
&EvalReadDiff{
|
|
Addr: addr.Resource,
|
|
ProviderSchema: &providerSchema,
|
|
Change: &diffApply,
|
|
},
|
|
|
|
// We don't want to do any destroys
|
|
// (these are handled by NodeDestroyResourceInstance instead)
|
|
&EvalIf{
|
|
If: func(ctx EvalContext) (bool, error) {
|
|
if diffApply == nil {
|
|
return true, EvalEarlyExitError{}
|
|
}
|
|
if diffApply.Action == plans.Delete {
|
|
return true, EvalEarlyExitError{}
|
|
}
|
|
return true, nil
|
|
},
|
|
Then: EvalNoop{},
|
|
},
|
|
|
|
&EvalIf{
|
|
If: func(ctx EvalContext) (bool, error) {
|
|
destroy := false
|
|
if diffApply != nil {
|
|
destroy = (diffApply.Action == plans.Delete || diffApply.Action.IsReplace())
|
|
}
|
|
if destroy && n.createBeforeDestroy() {
|
|
createBeforeDestroyEnabled = true
|
|
}
|
|
return createBeforeDestroyEnabled, nil
|
|
},
|
|
Then: &EvalDeposeState{
|
|
Addr: addr.Resource,
|
|
ForceKey: n.PreallocatedDeposedKey,
|
|
OutputKey: &deposedKey,
|
|
},
|
|
},
|
|
|
|
&EvalReadState{
|
|
Addr: addr.Resource,
|
|
Provider: &provider,
|
|
ProviderSchema: &providerSchema,
|
|
|
|
Output: &state,
|
|
},
|
|
|
|
// Get the saved diff
|
|
&EvalReadDiff{
|
|
Addr: addr.Resource,
|
|
ProviderSchema: &providerSchema,
|
|
Change: &diff,
|
|
},
|
|
|
|
// Make a new diff, in case we've learned new values in the state
|
|
// during apply which we can now incorporate.
|
|
&EvalDiff{
|
|
Addr: addr.Resource,
|
|
Config: n.Config,
|
|
Provider: &provider,
|
|
ProviderAddr: n.ResolvedProvider,
|
|
ProviderSchema: &providerSchema,
|
|
State: &state,
|
|
PreviousDiff: &diff,
|
|
OutputChange: &diffApply,
|
|
OutputValue: &configVal,
|
|
OutputState: &state,
|
|
},
|
|
|
|
// Compare the diffs
|
|
&EvalCheckPlannedChange{
|
|
Addr: addr.Resource,
|
|
ProviderAddr: n.ResolvedProvider,
|
|
ProviderSchema: &providerSchema,
|
|
Planned: &diff,
|
|
Actual: &diffApply,
|
|
},
|
|
|
|
&EvalGetProvider{
|
|
Addr: n.ResolvedProvider,
|
|
Output: &provider,
|
|
Schema: &providerSchema,
|
|
},
|
|
&EvalReadState{
|
|
Addr: addr.Resource,
|
|
Provider: &provider,
|
|
ProviderSchema: &providerSchema,
|
|
|
|
Output: &state,
|
|
},
|
|
|
|
&EvalReduceDiff{
|
|
Addr: addr.Resource,
|
|
InChange: &diffApply,
|
|
Destroy: false,
|
|
OutChange: &diffApply,
|
|
},
|
|
|
|
// EvalReduceDiff may have simplified our planned change
|
|
// into a NoOp if it only requires destroying, since destroying
|
|
// is handled by NodeDestroyResourceInstance.
|
|
&EvalIf{
|
|
If: func(ctx EvalContext) (bool, error) {
|
|
if diffApply == nil || diffApply.Action == plans.NoOp {
|
|
return true, EvalEarlyExitError{}
|
|
}
|
|
return true, nil
|
|
},
|
|
Then: EvalNoop{},
|
|
},
|
|
|
|
// Call pre-apply hook
|
|
&EvalApplyPre{
|
|
Addr: addr.Resource,
|
|
State: &state,
|
|
Change: &diffApply,
|
|
},
|
|
&EvalApply{
|
|
Addr: addr.Resource,
|
|
Config: n.Config,
|
|
Dependencies: n.StateReferences(),
|
|
State: &state,
|
|
Change: &diffApply,
|
|
Provider: &provider,
|
|
ProviderAddr: n.ResolvedProvider,
|
|
ProviderSchema: &providerSchema,
|
|
Output: &state,
|
|
Error: &err,
|
|
CreateNew: &createNew,
|
|
},
|
|
&EvalMaybeTainted{
|
|
Addr: addr.Resource,
|
|
State: &state,
|
|
Change: &diffApply,
|
|
Error: &err,
|
|
StateOutput: &state,
|
|
},
|
|
&EvalWriteState{
|
|
Addr: addr.Resource,
|
|
ProviderAddr: n.ResolvedProvider,
|
|
ProviderSchema: &providerSchema,
|
|
State: &state,
|
|
},
|
|
&EvalApplyProvisioners{
|
|
Addr: addr.Resource,
|
|
State: &state, // EvalApplyProvisioners will skip if already tainted
|
|
ResourceConfig: n.Config,
|
|
CreateNew: &createNew,
|
|
Error: &err,
|
|
When: configs.ProvisionerWhenCreate,
|
|
},
|
|
&EvalMaybeTainted{
|
|
Addr: addr.Resource,
|
|
State: &state,
|
|
Change: &diffApply,
|
|
Error: &err,
|
|
StateOutput: &state,
|
|
},
|
|
&EvalWriteState{
|
|
Addr: addr.Resource,
|
|
ProviderAddr: n.ResolvedProvider,
|
|
ProviderSchema: &providerSchema,
|
|
State: &state,
|
|
},
|
|
&EvalIf{
|
|
If: func(ctx EvalContext) (bool, error) {
|
|
return createBeforeDestroyEnabled && err != nil, nil
|
|
},
|
|
Then: &EvalMaybeRestoreDeposedObject{
|
|
Addr: addr.Resource,
|
|
Key: &deposedKey,
|
|
},
|
|
},
|
|
|
|
// We clear the diff out here so that future nodes
|
|
// don't see a diff that is already complete. There
|
|
// is no longer a diff!
|
|
&EvalIf{
|
|
If: func(ctx EvalContext) (bool, error) {
|
|
if !diff.Action.IsReplace() {
|
|
return true, nil
|
|
}
|
|
if !n.createBeforeDestroy() {
|
|
return true, nil
|
|
}
|
|
return false, nil
|
|
},
|
|
Then: &EvalWriteDiff{
|
|
Addr: addr.Resource,
|
|
ProviderSchema: &providerSchema,
|
|
Change: nil,
|
|
},
|
|
},
|
|
|
|
&EvalApplyPost{
|
|
Addr: addr.Resource,
|
|
State: &state,
|
|
Error: &err,
|
|
},
|
|
&EvalUpdateStateHook{},
|
|
},
|
|
}
|
|
}
|