make a resource schema dependant on another variable
I'm creating a plugin in terraform and say i want to add a schema which can be called only when another schema has be provided.
"host_name": &schema.Schema{
Type: schema.TypeString,
Optional: true,
DefaultFunc: schema.EnvDefaultFunc("host_name", nil),
Description: "Should give name in FQDN if being used for DNS puposes .",
},
"enableDns": &schema.Schema{
Type: schema.TypeString,
Required: true,
DefaultFunc: schema.EnvDefaultFunc("host_name", nil),
Description: "Should give name in FQDN if being used for DNS puposes .",
so here i want to pass the enableDNs String in the .tf file only when host_name is passed ,if it is not given and i pass enableDNs it should throw an error, can anybody point me out on how to do it
terraform
edited Dec 28 '18 at 15:49
kostix
30.1k648102
asked Dec 28 '18 at 7:58
Saiprasanna SastrySaiprasanna Sastry
93
add a comment |
I'm creating a plugin in terraform and say i want to add a schema which can be called only when another schema has be provided.
"host_name": &schema.Schema{
Type: schema.TypeString,
Optional: true,
DefaultFunc: schema.EnvDefaultFunc("host_name", nil),
Description: "Should give name in FQDN if being used for DNS puposes .",
},
"enableDns": &schema.Schema{
Type: schema.TypeString,
Required: true,
DefaultFunc: schema.EnvDefaultFunc("host_name", nil),
Description: "Should give name in FQDN if being used for DNS puposes .",
so here i want to pass the enableDNs String in the .tf file only when host_name is passed ,if it is not given and i pass enableDNs it should throw an error, can anybody point me out on how to do it
terraform
edited Dec 28 '18 at 15:49
kostix
30.1k648102
asked Dec 28 '18 at 7:58
Saiprasanna SastrySaiprasanna Sastry
93
add a comment |
I'm creating a plugin in terraform and say i want to add a schema which can be called only when another schema has be provided.
"host_name": &schema.Schema{
Type: schema.TypeString,
Optional: true,
DefaultFunc: schema.EnvDefaultFunc("host_name", nil),
Description: "Should give name in FQDN if being used for DNS puposes .",
},
"enableDns": &schema.Schema{
Type: schema.TypeString,
Required: true,
DefaultFunc: schema.EnvDefaultFunc("host_name", nil),
Description: "Should give name in FQDN if being used for DNS puposes .",
so here i want to pass the enableDNs String in the .tf file only when host_name is passed ,if it is not given and i pass enableDNs it should throw an error, can anybody point me out on how to do it
terraform
edited Dec 28 '18 at 15:49
kostix
30.1k648102
asked Dec 28 '18 at 7:58
Saiprasanna SastrySaiprasanna Sastry
93
I'm creating a plugin in terraform and say i want to add a schema which can be called only when another schema has be provided.
"host_name": &schema.Schema{
Type: schema.TypeString,
Optional: true,
DefaultFunc: schema.EnvDefaultFunc("host_name", nil),
Description: "Should give name in FQDN if being used for DNS puposes .",
},
"enableDns": &schema.Schema{
Type: schema.TypeString,
Required: true,
DefaultFunc: schema.EnvDefaultFunc("host_name", nil),
Description: "Should give name in FQDN if being used for DNS puposes .",
so here i want to pass the enableDNs String in the .tf file only when host_name is passed ,if it is not given and i pass enableDNs it should throw an error, can anybody point me out on how to do it
terraform
terraform
edited Dec 28 '18 at 15:49
kostix
30.1k648102
asked Dec 28 '18 at 7:58
Saiprasanna SastrySaiprasanna Sastry
93
edited Dec 28 '18 at 15:49
kostix
30.1k648102
asked Dec 28 '18 at 7:58
Saiprasanna SastrySaiprasanna Sastry
93
edited Dec 28 '18 at 15:49
kostix
30.1k648102
edited Dec 28 '18 at 15:49
kostix
30.1k648102
edited Dec 28 '18 at 15:49
kostix
30.1k648102
30.1k648102
asked Dec 28 '18 at 7:58
Saiprasanna SastrySaiprasanna Sastry
93
asked Dec 28 '18 at 7:58
Saiprasanna SastrySaiprasanna Sastry
93
asked Dec 28 '18 at 7:58
Saiprasanna SastrySaiprasanna Sastry
93
93
add a comment |
add a comment |
1 Answer
1
active
oldest
votes
Terraform providers don't really have a first class way to do stuff conditionally based on other parameters other than the ConflictsWith attribute.
There is a hacky way to do some cross parameter stuff using CustomizeDiff but it's only really used in a couple of places where it's really needed.
Normally the provider would simply validate the individual parameters and if the API that the provider is working against requires cross parameter validation then this is only seen at apply time when the API returns the error.
For an example of using CustomizeDiff to throw a plan time error when doing cross parameter validation see the aws_elasticache_cluster resource:
CustomizeDiff: customdiff.Sequence(
func(diff *schema.ResourceDiff, v interface{}) error {
// Plan time validation for az_mode
// InvalidParameterCombination: Must specify at least two cache nodes in order to specify AZ Mode of 'cross-az'.
if v, ok := diff.GetOk("az_mode"); !ok || v.(string) != elasticache.AZModeCrossAz {
return nil
}
if v, ok := diff.GetOk("num_cache_nodes"); !ok || v.(int) != 1 {
return nil
}
return errors.New(`az_mode "cross-az" is not supported with num_cache_nodes = 1`)
},
answered Dec 28 '18 at 12:42
ydaetskcoRydaetskcoR
21.2k45373
add a comment |
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
Terraform providers don't really have a first class way to do stuff conditionally based on other parameters other than the ConflictsWith attribute.
There is a hacky way to do some cross parameter stuff using CustomizeDiff but it's only really used in a couple of places where it's really needed.
Normally the provider would simply validate the individual parameters and if the API that the provider is working against requires cross parameter validation then this is only seen at apply time when the API returns the error.
For an example of using CustomizeDiff to throw a plan time error when doing cross parameter validation see the aws_elasticache_cluster resource:
CustomizeDiff: customdiff.Sequence(
func(diff *schema.ResourceDiff, v interface{}) error {
// Plan time validation for az_mode
// InvalidParameterCombination: Must specify at least two cache nodes in order to specify AZ Mode of 'cross-az'.
if v, ok := diff.GetOk("az_mode"); !ok || v.(string) != elasticache.AZModeCrossAz {
return nil
}
if v, ok := diff.GetOk("num_cache_nodes"); !ok || v.(int) != 1 {
return nil
}
return errors.New(`az_mode "cross-az" is not supported with num_cache_nodes = 1`)
},
answered Dec 28 '18 at 12:42
ydaetskcoRydaetskcoR
21.2k45373
add a comment |
Terraform providers don't really have a first class way to do stuff conditionally based on other parameters other than the ConflictsWith attribute.
There is a hacky way to do some cross parameter stuff using CustomizeDiff but it's only really used in a couple of places where it's really needed.
Normally the provider would simply validate the individual parameters and if the API that the provider is working against requires cross parameter validation then this is only seen at apply time when the API returns the error.
For an example of using CustomizeDiff to throw a plan time error when doing cross parameter validation see the aws_elasticache_cluster resource:
CustomizeDiff: customdiff.Sequence(
func(diff *schema.ResourceDiff, v interface{}) error {
// Plan time validation for az_mode
// InvalidParameterCombination: Must specify at least two cache nodes in order to specify AZ Mode of 'cross-az'.
if v, ok := diff.GetOk("az_mode"); !ok || v.(string) != elasticache.AZModeCrossAz {
return nil
}
if v, ok := diff.GetOk("num_cache_nodes"); !ok || v.(int) != 1 {
return nil
}
return errors.New(`az_mode "cross-az" is not supported with num_cache_nodes = 1`)
},
answered Dec 28 '18 at 12:42
ydaetskcoRydaetskcoR
21.2k45373
add a comment |
Terraform providers don't really have a first class way to do stuff conditionally based on other parameters other than the ConflictsWith attribute.
There is a hacky way to do some cross parameter stuff using CustomizeDiff but it's only really used in a couple of places where it's really needed.
Normally the provider would simply validate the individual parameters and if the API that the provider is working against requires cross parameter validation then this is only seen at apply time when the API returns the error.
For an example of using CustomizeDiff to throw a plan time error when doing cross parameter validation see the aws_elasticache_cluster resource:
CustomizeDiff: customdiff.Sequence(
func(diff *schema.ResourceDiff, v interface{}) error {
// Plan time validation for az_mode
// InvalidParameterCombination: Must specify at least two cache nodes in order to specify AZ Mode of 'cross-az'.
if v, ok := diff.GetOk("az_mode"); !ok || v.(string) != elasticache.AZModeCrossAz {
return nil
}
if v, ok := diff.GetOk("num_cache_nodes"); !ok || v.(int) != 1 {
return nil
}
return errors.New(`az_mode "cross-az" is not supported with num_cache_nodes = 1`)
},
answered Dec 28 '18 at 12:42
ydaetskcoRydaetskcoR
21.2k45373
Terraform providers don't really have a first class way to do stuff conditionally based on other parameters other than the ConflictsWith attribute.
There is a hacky way to do some cross parameter stuff using CustomizeDiff but it's only really used in a couple of places where it's really needed.
Normally the provider would simply validate the individual parameters and if the API that the provider is working against requires cross parameter validation then this is only seen at apply time when the API returns the error.
For an example of using CustomizeDiff to throw a plan time error when doing cross parameter validation see the aws_elasticache_cluster resource:
CustomizeDiff: customdiff.Sequence(
func(diff *schema.ResourceDiff, v interface{}) error {
// Plan time validation for az_mode
// InvalidParameterCombination: Must specify at least two cache nodes in order to specify AZ Mode of 'cross-az'.
if v, ok := diff.GetOk("az_mode"); !ok || v.(string) != elasticache.AZModeCrossAz {
return nil
}
if v, ok := diff.GetOk("num_cache_nodes"); !ok || v.(int) != 1 {
return nil
}
return errors.New(`az_mode "cross-az" is not supported with num_cache_nodes = 1`)
},
answered Dec 28 '18 at 12:42
ydaetskcoRydaetskcoR
21.2k45373
edited Dec 28 '18 at 12:51
answered Dec 28 '18 at 12:42
ydaetskcoRydaetskcoR
21.2k45373
answered Dec 28 '18 at 12:42
ydaetskcoRydaetskcoR
21.2k45373
answered Dec 28 '18 at 12:42
ydaetskcoRydaetskcoR
21.2k45373
21.2k45373
add a comment |
add a comment |
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