Unable to update existing service

[HelloFillip]

When using the Fastly APIs directly it's possible to update an existing service, previously created through the dashboard.

Currently I'm unable to achieve the same with Pulumi.

I'm running a refresh, and then up command (with the Automation API) with the following:

	result, err := fastly.NewServiceVcl(pulumiContext, "edge-network-delivery", &fastly.ServiceVclArgs{
		Activate: pulumi.Bool(false),
		Backends: &fastly.ServiceVclBackendArray{
			&fastly.ServiceVclBackendArgs{
				Address:             pulumi.String("***-some-web-address.dev***"),
				AutoLoadbalance:     pulumi.Bool(false),
				BetweenBytesTimeout: pulumi.Int(10000),
				ConnectTimeout:      pulumi.Int(1000),
				ErrorThreshold:      pulumi.Int(0),
				FirstByteTimeout:    pulumi.Int(15000),
				Name:                pulumi.String("Home Site"),
				OverrideHost:        pulumi.String("***-some-web-address.dev***"),
				Shield:              pulumi.String("hel-helsinki.fi"),
				SslCertHostname:     pulumi.String("*.custom-hostname.dev"),
			},
		},
		Domains: &fastly.ServiceVclDomainArray{
			&fastly.ServiceVclDomainArgs{
				Name: pulumi.String("my-domain.site"),
			},
		},
		Reuse: pulumi.Bool(true),
		Name:  pulumi.String("My CDN service"),
	})

I've played with the Reuse and force delete options, and I'm half expecting that deleting the original handmade service is necessary.

The typical flow I am hoping to achieve with this package is to create a new version of a configuration, then apply it. However, there's no version settings that I can see here, and I'm getting the following response when applying the above configuration:

Name 'My CDN service' already taken for customer '54BLTxJYhXx7qnuR5UKcuLt8Hb3n2'

Any guidance on the expected behavior and how to achieve a similar flow is appreciated.

[NisseBoman]

From a Fastly perspective using terraform to control an existing service you need to import the service first so that TF will have a state, it will try to create a new one with out provider. The import function is there for that reason to build the current state first.

This might be the reason and maby it's easier to create a new service with Pulumi? You could just remove/change the hostname of the existing service and create a new one using Pulumi.

I haven't worked with Pulumi nor do I have the abilities to do PR's to this code but advising from my knowledge of TF and Fastly.

[HelloFillip]

@NisseBoman You're right in that the import feature should be used in Pulumi AFAIK. Using the Pulumi Automation API this would mean something similar to:

err := stack.Import(context, state)

Now I just need to figure out where (and how) the state is fetched from the Fastly plugin.

On the Pulumi CLI it would be something similar to:

pulumi import fastly:index:ServiceVcl "My CDN service" 

Although I'm not a Terraform user, so there's a small gap that needs to be bridged in my understanding.

[NisseBoman]

Adding this link for visibility: https://registry.terraform.io/providers/fastly/fastly/latest/docs/resources/service_compute#import

[HelloFillip]

I resolves this. Thanks to the Terraform tip @NisseBoman. I want to provide the approach for future use cases.

When trying this approach I did receive an error that changes did not correlate, and I tried using pulumi.IgnoreChanges() to resolve this, but this failed to apply any changes.

I removed that and tried again, (with a correction to the shield as there was a typo), and it worked.

One thing to note, the Activate property did not create a new version. When this was modified to true the changes were successfully applied. I would prefer to get an update to occur without activating, but this is a workable start.

	result, err := fastly.NewServiceVcl(pulumiContext, "edge-network-delivery", &fastly.ServiceVclArgs{
		Activate: pulumi.Bool(false),
		Backends: &fastly.ServiceVclBackendArray{
			&fastly.ServiceVclBackendArgs{
				Address:             pulumi.String("***-some-web-address.dev***"),
				AutoLoadbalance:     pulumi.Bool(false),
				BetweenBytesTimeout: pulumi.Int(10000),
				ConnectTimeout:      pulumi.Int(1000),
				ErrorThreshold:      pulumi.Int(0),
				FirstByteTimeout:    pulumi.Int(15000),
				Name:                pulumi.String("Home Site"),
				OverrideHost:        pulumi.String("***-some-web-address.dev***"),
				Shield:              pulumi.String("hel-helsinki-fi"),
				SslCertHostname:     pulumi.String("*.custom-hostname.dev"),
			},
		},
		Domains: &fastly.ServiceVclDomainArray{
			&fastly.ServiceVclDomainArgs{
				Name: pulumi.String("my-domain.site"),
			},
		},
		Reuse: pulumi.Bool(true),
		Name:  pulumi.String("My CDN service"),
	}, pulumi.Import(pulumi.ID("54BLTxJYhXx7qnuR5UKcuLt8Hb3n2"))