blob: a70bcdc4bc85d36d47110ef4b6424c628b820345 [file] [log] [blame]
package terraform
import (
"fmt"
"strings"
"github.com/hashicorp/hcl/v2"
"github.com/hashicorp/terraform/internal/addrs"
"github.com/hashicorp/terraform/internal/configs"
"github.com/hashicorp/terraform/internal/configs/configschema"
"github.com/hashicorp/terraform/internal/didyoumean"
"github.com/hashicorp/terraform/internal/instances"
"github.com/hashicorp/terraform/internal/lang"
"github.com/hashicorp/terraform/internal/providers"
"github.com/hashicorp/terraform/internal/provisioners"
"github.com/hashicorp/terraform/internal/tfdiags"
"github.com/zclconf/go-cty/cty"
)
// NodeValidatableResource represents a resource that is used for validation
// only.
type NodeValidatableResource struct {
*NodeAbstractResource
}
var (
_ GraphNodeModuleInstance = (*NodeValidatableResource)(nil)
_ GraphNodeExecutable = (*NodeValidatableResource)(nil)
_ GraphNodeReferenceable = (*NodeValidatableResource)(nil)
_ GraphNodeReferencer = (*NodeValidatableResource)(nil)
_ GraphNodeConfigResource = (*NodeValidatableResource)(nil)
_ GraphNodeAttachResourceConfig = (*NodeValidatableResource)(nil)
_ GraphNodeAttachProviderMetaConfigs = (*NodeValidatableResource)(nil)
)
func (n *NodeValidatableResource) Path() addrs.ModuleInstance {
// There is no expansion during validation, so we evaluate everything as
// single module instances.
return n.Addr.Module.UnkeyedInstanceShim()
}
// GraphNodeEvalable
func (n *NodeValidatableResource) Execute(ctx EvalContext, op walkOperation) (diags tfdiags.Diagnostics) {
diags = diags.Append(n.validateResource(ctx))
diags = diags.Append(n.validateCheckRules(ctx, n.Config))
if managed := n.Config.Managed; managed != nil {
// Validate all the provisioners
for _, p := range managed.Provisioners {
if p.Connection == nil {
p.Connection = n.Config.Managed.Connection
} else if n.Config.Managed.Connection != nil {
p.Connection.Config = configs.MergeBodies(n.Config.Managed.Connection.Config, p.Connection.Config)
}
// Validate Provisioner Config
diags = diags.Append(n.validateProvisioner(ctx, p))
if diags.HasErrors() {
return diags
}
}
}
return diags
}
// validateProvisioner validates the configuration of a provisioner belonging to
// a resource. The provisioner config is expected to contain the merged
// connection configurations.
func (n *NodeValidatableResource) validateProvisioner(ctx EvalContext, p *configs.Provisioner) tfdiags.Diagnostics {
var diags tfdiags.Diagnostics
provisioner, err := ctx.Provisioner(p.Type)
if err != nil {
diags = diags.Append(err)
return diags
}
if provisioner == nil {
return diags.Append(fmt.Errorf("provisioner %s not initialized", p.Type))
}
provisionerSchema, err := ctx.ProvisionerSchema(p.Type)
if err != nil {
return diags.Append(fmt.Errorf("failed to read schema for provisioner %s: %s", p.Type, err))
}
if provisionerSchema == nil {
return diags.Append(fmt.Errorf("provisioner %s has no schema", p.Type))
}
// Validate the provisioner's own config first
configVal, _, configDiags := n.evaluateBlock(ctx, p.Config, provisionerSchema)
diags = diags.Append(configDiags)
if configVal == cty.NilVal {
// Should never happen for a well-behaved EvaluateBlock implementation
return diags.Append(fmt.Errorf("EvaluateBlock returned nil value"))
}
// Use unmarked value for validate request
unmarkedConfigVal, _ := configVal.UnmarkDeep()
req := provisioners.ValidateProvisionerConfigRequest{
Config: unmarkedConfigVal,
}
resp := provisioner.ValidateProvisionerConfig(req)
diags = diags.Append(resp.Diagnostics)
if p.Connection != nil {
// We can't comprehensively validate the connection config since its
// final structure is decided by the communicator and we can't instantiate
// that until we have a complete instance state. However, we *can* catch
// configuration keys that are not valid for *any* communicator, catching
// typos early rather than waiting until we actually try to run one of
// the resource's provisioners.
_, _, connDiags := n.evaluateBlock(ctx, p.Connection.Config, connectionBlockSupersetSchema)
diags = diags.Append(connDiags)
}
return diags
}
func (n *NodeValidatableResource) evaluateBlock(ctx EvalContext, body hcl.Body, schema *configschema.Block) (cty.Value, hcl.Body, tfdiags.Diagnostics) {
keyData, selfAddr := n.stubRepetitionData(n.Config.Count != nil, n.Config.ForEach != nil)
return ctx.EvaluateBlock(body, schema, selfAddr, keyData)
}
// connectionBlockSupersetSchema is a schema representing the superset of all
// possible arguments for "connection" blocks across all supported connection
// types.
//
// This currently lives here because we've not yet updated our communicator
// subsystem to be aware of schema itself. Once that is done, we can remove
// this and use a type-specific schema from the communicator to validate
// exactly what is expected for a given connection type.
var connectionBlockSupersetSchema = &configschema.Block{
Attributes: map[string]*configschema.Attribute{
// NOTE: "type" is not included here because it's treated special
// by the config loader and stored away in a separate field.
// Common attributes for both connection types
"host": {
Type: cty.String,
Required: true,
},
"type": {
Type: cty.String,
Optional: true,
},
"user": {
Type: cty.String,
Optional: true,
},
"password": {
Type: cty.String,
Optional: true,
},
"port": {
Type: cty.Number,
Optional: true,
},
"timeout": {
Type: cty.String,
Optional: true,
},
"script_path": {
Type: cty.String,
Optional: true,
},
// For type=ssh only (enforced in ssh communicator)
"target_platform": {
Type: cty.String,
Optional: true,
},
"private_key": {
Type: cty.String,
Optional: true,
},
"certificate": {
Type: cty.String,
Optional: true,
},
"host_key": {
Type: cty.String,
Optional: true,
},
"agent": {
Type: cty.Bool,
Optional: true,
},
"agent_identity": {
Type: cty.String,
Optional: true,
},
"proxy_scheme": {
Type: cty.String,
Optional: true,
},
"proxy_host": {
Type: cty.String,
Optional: true,
},
"proxy_port": {
Type: cty.Number,
Optional: true,
},
"proxy_user_name": {
Type: cty.String,
Optional: true,
},
"proxy_user_password": {
Type: cty.String,
Optional: true,
},
"bastion_host": {
Type: cty.String,
Optional: true,
},
"bastion_host_key": {
Type: cty.String,
Optional: true,
},
"bastion_port": {
Type: cty.Number,
Optional: true,
},
"bastion_user": {
Type: cty.String,
Optional: true,
},
"bastion_password": {
Type: cty.String,
Optional: true,
},
"bastion_private_key": {
Type: cty.String,
Optional: true,
},
"bastion_certificate": {
Type: cty.String,
Optional: true,
},
// For type=winrm only (enforced in winrm communicator)
"https": {
Type: cty.Bool,
Optional: true,
},
"insecure": {
Type: cty.Bool,
Optional: true,
},
"cacert": {
Type: cty.String,
Optional: true,
},
"use_ntlm": {
Type: cty.Bool,
Optional: true,
},
},
}
func (n *NodeValidatableResource) validateResource(ctx EvalContext) tfdiags.Diagnostics {
var diags tfdiags.Diagnostics
provider, providerSchema, err := getProvider(ctx, n.ResolvedProvider)
diags = diags.Append(err)
if diags.HasErrors() {
return diags
}
if providerSchema == nil {
diags = diags.Append(fmt.Errorf("validateResource has nil schema for %s", n.Addr))
return diags
}
keyData := EvalDataForNoInstanceKey
switch {
case n.Config.Count != nil:
// If the config block has count, we'll evaluate with an unknown
// number as count.index so we can still type check even though
// we won't expand count until the plan phase.
keyData = InstanceKeyEvalData{
CountIndex: cty.UnknownVal(cty.Number),
}
// Basic type-checking of the count argument. More complete validation
// of this will happen when we DynamicExpand during the plan walk.
countDiags := validateCount(ctx, n.Config.Count)
diags = diags.Append(countDiags)
case n.Config.ForEach != nil:
keyData = InstanceKeyEvalData{
EachKey: cty.UnknownVal(cty.String),
EachValue: cty.UnknownVal(cty.DynamicPseudoType),
}
// Evaluate the for_each expression here so we can expose the diagnostics
forEachDiags := validateForEach(ctx, n.Config.ForEach)
diags = diags.Append(forEachDiags)
}
diags = diags.Append(validateDependsOn(ctx, n.Config.DependsOn))
// Validate the provider_meta block for the provider this resource
// belongs to, if there is one.
//
// Note: this will return an error for every resource a provider
// uses in a module, if the provider_meta for that module is
// incorrect. The only way to solve this that we've found is to
// insert a new ProviderMeta graph node in the graph, and make all
// that provider's resources in the module depend on the node. That's
// an awful heavy hammer to swing for this feature, which should be
// used only in limited cases with heavy coordination with the
// Terraform team, so we're going to defer that solution for a future
// enhancement to this functionality.
/*
if n.ProviderMetas != nil {
if m, ok := n.ProviderMetas[n.ProviderAddr.ProviderConfig.Type]; ok && m != nil {
// if the provider doesn't support this feature, throw an error
if (*n.ProviderSchema).ProviderMeta == nil {
diags = diags.Append(&hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: fmt.Sprintf("Provider %s doesn't support provider_meta", cfg.ProviderConfigAddr()),
Detail: fmt.Sprintf("The resource %s belongs to a provider that doesn't support provider_meta blocks", n.Addr),
Subject: &m.ProviderRange,
})
} else {
_, _, metaDiags := ctx.EvaluateBlock(m.Config, (*n.ProviderSchema).ProviderMeta, nil, EvalDataForNoInstanceKey)
diags = diags.Append(metaDiags)
}
}
}
*/
// BUG(paddy): we're not validating provider_meta blocks on EvalValidate right now
// because the ProviderAddr for the resource isn't available on the EvalValidate
// struct.
// Provider entry point varies depending on resource mode, because
// managed resources and data resources are two distinct concepts
// in the provider abstraction.
switch n.Config.Mode {
case addrs.ManagedResourceMode:
schema, _ := providerSchema.SchemaForResourceType(n.Config.Mode, n.Config.Type)
if schema == nil {
var suggestion string
if dSchema, _ := providerSchema.SchemaForResourceType(addrs.DataResourceMode, n.Config.Type); dSchema != nil {
suggestion = fmt.Sprintf("\n\nDid you intend to use the data source %q? If so, declare this using a \"data\" block instead of a \"resource\" block.", n.Config.Type)
} else if len(providerSchema.ResourceTypes) > 0 {
suggestions := make([]string, 0, len(providerSchema.ResourceTypes))
for name := range providerSchema.ResourceTypes {
suggestions = append(suggestions, name)
}
if suggestion = didyoumean.NameSuggestion(n.Config.Type, suggestions); suggestion != "" {
suggestion = fmt.Sprintf(" Did you mean %q?", suggestion)
}
}
diags = diags.Append(&hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: "Invalid resource type",
Detail: fmt.Sprintf("The provider %s does not support resource type %q.%s", n.Provider().ForDisplay(), n.Config.Type, suggestion),
Subject: &n.Config.TypeRange,
})
return diags
}
configVal, _, valDiags := ctx.EvaluateBlock(n.Config.Config, schema, nil, keyData)
diags = diags.Append(valDiags)
if valDiags.HasErrors() {
return diags
}
if n.Config.Managed != nil { // can be nil only in tests with poorly-configured mocks
for _, traversal := range n.Config.Managed.IgnoreChanges {
// validate the ignore_changes traversals apply.
moreDiags := schema.StaticValidateTraversal(traversal)
diags = diags.Append(moreDiags)
// ignore_changes cannot be used for Computed attributes,
// unless they are also Optional.
// If the traversal was valid, convert it to a cty.Path and
// use that to check whether the Attribute is Computed and
// non-Optional.
if !diags.HasErrors() {
path := traversalToPath(traversal)
attrSchema := schema.AttributeByPath(path)
if attrSchema != nil && !attrSchema.Optional && attrSchema.Computed {
// ignore_changes uses absolute traversal syntax in config despite
// using relative traversals, so we strip the leading "." added by
// FormatCtyPath for a better error message.
attrDisplayPath := strings.TrimPrefix(tfdiags.FormatCtyPath(path), ".")
diags = diags.Append(&hcl.Diagnostic{
Severity: hcl.DiagWarning,
Summary: "Redundant ignore_changes element",
Detail: fmt.Sprintf("Adding an attribute name to ignore_changes tells Terraform to ignore future changes to the argument in configuration after the object has been created, retaining the value originally configured.\n\nThe attribute %s is decided by the provider alone and therefore there can be no configured value to compare with. Including this attribute in ignore_changes has no effect. Remove the attribute from ignore_changes to quiet this warning.", attrDisplayPath),
Subject: &n.Config.TypeRange,
})
}
}
}
}
// Use unmarked value for validate request
unmarkedConfigVal, _ := configVal.UnmarkDeep()
req := providers.ValidateResourceConfigRequest{
TypeName: n.Config.Type,
Config: unmarkedConfigVal,
}
resp := provider.ValidateResourceConfig(req)
diags = diags.Append(resp.Diagnostics.InConfigBody(n.Config.Config, n.Addr.String()))
case addrs.DataResourceMode:
schema, _ := providerSchema.SchemaForResourceType(n.Config.Mode, n.Config.Type)
if schema == nil {
var suggestion string
if dSchema, _ := providerSchema.SchemaForResourceType(addrs.ManagedResourceMode, n.Config.Type); dSchema != nil {
suggestion = fmt.Sprintf("\n\nDid you intend to use the managed resource type %q? If so, declare this using a \"resource\" block instead of a \"data\" block.", n.Config.Type)
} else if len(providerSchema.DataSources) > 0 {
suggestions := make([]string, 0, len(providerSchema.DataSources))
for name := range providerSchema.DataSources {
suggestions = append(suggestions, name)
}
if suggestion = didyoumean.NameSuggestion(n.Config.Type, suggestions); suggestion != "" {
suggestion = fmt.Sprintf(" Did you mean %q?", suggestion)
}
}
diags = diags.Append(&hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: "Invalid data source",
Detail: fmt.Sprintf("The provider %s does not support data source %q.%s", n.Provider().ForDisplay(), n.Config.Type, suggestion),
Subject: &n.Config.TypeRange,
})
return diags
}
configVal, _, valDiags := ctx.EvaluateBlock(n.Config.Config, schema, nil, keyData)
diags = diags.Append(valDiags)
if valDiags.HasErrors() {
return diags
}
// Use unmarked value for validate request
unmarkedConfigVal, _ := configVal.UnmarkDeep()
req := providers.ValidateDataResourceConfigRequest{
TypeName: n.Config.Type,
Config: unmarkedConfigVal,
}
resp := provider.ValidateDataResourceConfig(req)
diags = diags.Append(resp.Diagnostics.InConfigBody(n.Config.Config, n.Addr.String()))
}
return diags
}
func (n *NodeValidatableResource) evaluateExpr(ctx EvalContext, expr hcl.Expression, wantTy cty.Type, self addrs.Referenceable, keyData instances.RepetitionData) (cty.Value, tfdiags.Diagnostics) {
var diags tfdiags.Diagnostics
refs, refDiags := lang.ReferencesInExpr(expr)
diags = diags.Append(refDiags)
scope := ctx.EvaluationScope(self, keyData)
hclCtx, moreDiags := scope.EvalContext(refs)
diags = diags.Append(moreDiags)
result, hclDiags := expr.Value(hclCtx)
diags = diags.Append(hclDiags)
return result, diags
}
func (n *NodeValidatableResource) stubRepetitionData(hasCount, hasForEach bool) (instances.RepetitionData, addrs.Referenceable) {
keyData := EvalDataForNoInstanceKey
selfAddr := n.ResourceAddr().Resource.Instance(addrs.NoKey)
if n.Config.Count != nil {
// For a resource that has count, we allow count.index but don't
// know at this stage what it will return.
keyData = InstanceKeyEvalData{
CountIndex: cty.UnknownVal(cty.Number),
}
// "self" can't point to an unknown key, but we'll force it to be
// key 0 here, which should return an unknown value of the
// expected type since none of these elements are known at this
// point anyway.
selfAddr = n.ResourceAddr().Resource.Instance(addrs.IntKey(0))
} else if n.Config.ForEach != nil {
// For a resource that has for_each, we allow each.value and each.key
// but don't know at this stage what it will return.
keyData = InstanceKeyEvalData{
EachKey: cty.UnknownVal(cty.String),
EachValue: cty.DynamicVal,
}
// "self" can't point to an unknown key, but we'll force it to be
// key "" here, which should return an unknown value of the
// expected type since none of these elements are known at
// this point anyway.
selfAddr = n.ResourceAddr().Resource.Instance(addrs.StringKey(""))
}
return keyData, selfAddr
}
func (n *NodeValidatableResource) validateCheckRules(ctx EvalContext, config *configs.Resource) tfdiags.Diagnostics {
var diags tfdiags.Diagnostics
keyData, selfAddr := n.stubRepetitionData(n.Config.Count != nil, n.Config.ForEach != nil)
for _, cr := range config.Preconditions {
_, conditionDiags := n.evaluateExpr(ctx, cr.Condition, cty.Bool, nil, keyData)
diags = diags.Append(conditionDiags)
_, errorMessageDiags := n.evaluateExpr(ctx, cr.ErrorMessage, cty.Bool, nil, keyData)
diags = diags.Append(errorMessageDiags)
}
for _, cr := range config.Postconditions {
_, conditionDiags := n.evaluateExpr(ctx, cr.Condition, cty.Bool, selfAddr, keyData)
diags = diags.Append(conditionDiags)
_, errorMessageDiags := n.evaluateExpr(ctx, cr.ErrorMessage, cty.Bool, selfAddr, keyData)
diags = diags.Append(errorMessageDiags)
}
return diags
}
func validateCount(ctx EvalContext, expr hcl.Expression) (diags tfdiags.Diagnostics) {
val, countDiags := evaluateCountExpressionValue(expr, ctx)
// If the value isn't known then that's the best we can do for now, but
// we'll check more thoroughly during the plan walk
if !val.IsKnown() {
return diags
}
if countDiags.HasErrors() {
diags = diags.Append(countDiags)
}
return diags
}
func validateForEach(ctx EvalContext, expr hcl.Expression) (diags tfdiags.Diagnostics) {
val, forEachDiags := evaluateForEachExpressionValue(expr, ctx, true)
// If the value isn't known then that's the best we can do for now, but
// we'll check more thoroughly during the plan walk
if !val.IsKnown() {
return diags
}
if forEachDiags.HasErrors() {
diags = diags.Append(forEachDiags)
}
return diags
}
func validateDependsOn(ctx EvalContext, dependsOn []hcl.Traversal) (diags tfdiags.Diagnostics) {
for _, traversal := range dependsOn {
ref, refDiags := addrs.ParseRef(traversal)
diags = diags.Append(refDiags)
if !refDiags.HasErrors() && len(ref.Remaining) != 0 {
diags = diags.Append(&hcl.Diagnostic{
Severity: hcl.DiagError,
Summary: "Invalid depends_on reference",
Detail: "References in depends_on must be to a whole object (resource, etc), not to an attribute of an object.",
Subject: ref.Remaining.SourceRange().Ptr(),
})
}
// The ref must also refer to something that exists. To test that,
// we'll just eval it and count on the fact that our evaluator will
// detect references to non-existent objects.
if !diags.HasErrors() {
scope := ctx.EvaluationScope(nil, EvalDataForNoInstanceKey)
if scope != nil { // sometimes nil in tests, due to incomplete mocks
_, refDiags = scope.EvalReference(ref, cty.DynamicPseudoType)
diags = diags.Append(refDiags)
}
}
}
return diags
}