Terraform is working as intended here, even though some of the rationale for those intentions is lost to history, and so I'm torn about whether to classify this as a documentation bug, which we would close by updating the documentation, or as an enhancement request which would represent us trying to find a backward-compatible way to permit more flexibility in "remote system" names. You signed in with another tab or window. This could be a malformed file, or it could be one thats already been upgraded to 0.12 (so its already fine) either way, we cant do anything useful, so lets skip it: Errors should never pass silently, so I dont want to ignore those files completely, but sending the message to stderr means its separate from other output from print(). Instead, it falls through to the external package address parser. Initializing Terraform configuration. If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further. Each implementation of the module registry protocol could potentially impose additional constraints on names beyond the ones Terraform CLI itself imposes, but if that is causing a problem then that would be something to fix in whatever registry is imposing the undesirable extra rules, rather than something to be fixed in Terraform CLI itself. Could you be more specific? The ./ prefix indicates that the address is a relative filesystem path. However, I find it strange that terraform is not able to handle the - in names in a registry. If the module path is omitted, the address applies to the root module. Terraform stop with an error indicating that the module is not a registry URL. In real-world modules I've seen a mix of two seemingly-equally-common patterns: Of course, as I noted above we no longer consider the final portion of the registry module address format as directly a provider name, and instead leave it up to module developers to choose a suitable short descriptor for whatever remote system the module primarily works with. Precisely, I respect the format given by gitlab. This is required if source_address_prefixes is not specified. This only appears when the provider has a hyphen - in the name. I'm going to lock this issue because it has been closed for 30 days . modules names with hypens (or underscores) are allowed on Terraform public registry but not on private ones. in any descendent module. To give a more concrete example, here is a module I use: This appears to be the same question I replied to in an issue here. module "hello" {. Since this does not represent a bug in Terraform itself, I'm going to close the issue. I located some gitlab module registry documentation here, which shows the expected source format, including the hostname. This example comes from the following Terraform source: We can look up the modules in a file like so: If the file doesnt use any modules, we can skip doing anything else. If you intended this as a path relative to the current module, use ./s3_bucket instead. so you'll need to refer to the documentation for the specific feature you So this example would be fine, and use the module defined in the s3_bucket directory: If you try to run the snippet above in 0.12, you get an error: The module address s3_bucket could not be resolved. Well occasionally send you account related emails. // This is to make sure we really return a nil ModuleSource in, // this case, rather than an interface containing the zero, // parseModuleRegistryTargetSystem validates and normalizes a string in the, // "target system" position of a module registry source address. The public registry has no such module available. Have a question about this project? The module registry protocol allows to have a hyphen in the name of the provider but they do not exist on the Terraform registry because the procedure to publish a module on this Terraform registry requires to have a git repository in the format terraform--. It's unfortunate that the error message is obscure here, but that's a side effect of trying to parse ambiguous source addresses with best effort. The intention of this naming scheme would be for you to name this module something like gitlab.example.fr/toto/cluster-autoscaler/aws, where that last part represents that this is a module intended for use with AWS which primarily (but not exclusively) uses the hashicorp/aws provider. Then youd use the module to create all your buckets: When you use a module, the source input tells Terraform where the module is defined that is, the files that tell it which resources the module should create. defined in .tf files under the current directory. Now we have the modules, we can loop over them and check the source field. Tags may not be used. The text was updated successfully, but these errors were encountered: Theres a PyPI module for parsing Terraform syntax (pyhcl), so lets use that: You get an output that looks something like this: The first key is the type of Terraform object youre creating (output, resource, module, and so on), the second key is the name of the object, the third key is the inputs being passed to that object. Tags such as 'VirtualNetwork', 'AzureLoadBalancer' and 'Internet' can also be used. source_address_prefixes - (Optional) List of source address prefixes. Hi @jeremmfr! A resource spec addresses a specific resource instance in the selected module. If youre running Terraform 0.11 and havent upgraded to 0.12 yet, you might want to run this script so you can fix your own module references. I have the latest version of terraform available. I went in and fixed them by hand, then ran the script a second time to confirm Id fixed them all. We can't. My version is well present in the registry. If you run this over the whole repo, you might get a ValueError on the hcl.load() line. The final bit of context I want to capture here is that elsewhere in the Terraform language we typically assume providers will have local names consisting entirely of letters and digits (but don't require it, IIRC). Module Blocks. But with a third-party module registry implementation, a module with hyphen in provider's name is possible. In practice there's very little that, // go-getter doesn't consider invalid input, so even invalid, // nonsense will probably interpreted as _something_ here, // and then fail during installation instead. Doing terraform init. Thats not important in a one-off script, but its a useful habit to get into. In addition to custom validation rules, you can use Terraform's rich language syntax to validate variables with an object structure and check that the module receives the expected input. The first problem encountered was on a private registry, but it is also present with public registry. Terraform try download the module on the registry. Assuming that changeset passes review and we merge it, that'll close out this issue for now. k8s. The text was updated successfully, but these errors were encountered: Thanks for the report. While I don't consider that an ideal solution, it feels to me like the best compromise to give better feedback here without risk of breaking the v1.0 Compatibility Promises. 2020/04/14 21:01:09 [DEBUG] Using modified User-Agent: Terraform/.12.20 TFE/v202003-1 Error: Provider configuration not present To work with module.xxxx.infoblox_record_host.host its original provider configuration at module.xxxx.provider.infoblox.abc01 is required, but it has been removed. I need help with sourcing terraform modules from a gitlab repository with multiple modules in it like ec2, vpc etc. In earlier // really improve this situation for historical reasons. module "consul" { source = "hashicorp/consul/aws" version = "0.1.0" } # Skip the .terraform directory, which is a local cache of. (I dont know if it really makes sense to define a cluster autoscaler in Azure in particular, but this can be useful for provider-agnostic abstractions like e.g. into modules as well as directly into the root of your state. That would mean that the error message here would've been something like: Since I knew that the current implementation would never actually show the error messages from the registry address parser, I didn't spend a lot of time polishing them. Terraform v0.12 partially resolved that by refining the rules for local paths to say that they must always start with either ../ or ./ to disambiguate, but we ended up having to still preserve an unfortunate behavior of underlying go-getter where it essentially treats anything it can't otherwise parse as an absolute file path (which Terraform then treats as if it were an external package, to ensure that the source code ends up at a system-agnostic location). I use os.walk() a lot, and I always create little generator functions like this. If you have found a problem that seems similar to this, please open a new issue and complete the issue template so we can capture all the details necessary to investigate further. (Although breaking changes are always annoying, I dont mind this one so much Im getting to delete a lot of ugly workarounds Id written for limitations in the old HCL.). I believe this constraint should also be enforced at the Terraform Registry side (including the Terraform Cloud private registry). Even a simple configuration consisting of a single directory with one or more .tf files is a module. Does creating a module without the - characters in the final segment avoid the issue? In reality, I tried download a module on a private registry (with a Gitlab instance), with a custom provider which have a hyphen in his name. privacy statement. Applying terraform . I don't have a strong opinion on the answer to this question right now; I think it'd be worth doing some research into how existing modules are being classified and what motivated those classifications. The provider component of a module source address must consist only of alphanumeric charactershyphens are not supported. Create any resource in the new module compute and run terraform apply to make sure the module is added to the state. Terraform expects to find a fully-qualified hostname in that position, and so if you are literally writing x then it may help to add to the end whatever domain this x belongs to, like x.example.com. Terraform. Fixed by #30053 jeremmfr commented on Sep 7, 2021 Set the hashicorp/google-beta provider to have a local name of just google, which then makes Terraform automatically associate resource "google_anything" "." with that provider without explicitly stating it. Both the terraform get and terraform init commands will install and update modules. If you add in the host prefix to your source, the error output will be. Already on GitHub? In the AWS load balancer case, add a map representing service objects and their expected attributes and type. I have two branches in module repo - develop and main. For example, our behavior of automatically using the prefix of a resource type name to select its provider works by taking the position of the first underscore as the separator marking the end of the provider name, and so aws_instance automatically attaches to a provider with the local name aws unless the module author explicitly overrides it by writing a provider argument inside the resource block. to your account, https://gist.github.com/jeremmfr/2dfa73953adb30692106ed0b976549fe. multi-instance resource. Some say that Terraform modules are a way of extending your present Terraform configuration . Successfully merging a pull request may close this issue. Now I have installed the terraform v0.13 and running the following commands. If not, I hope you found the post interesting, and picked up a tip or two to use the next time youre writing your own scripts. This provider will be made public shortly, but there are also other providers (no beta) which are already present with a hyphen. gitlab.example.fr/toto/cluster-autoscaler/azure for an Azure implementation of the same idea. This constraint arises from the fact that the target system portion of the module address syntax the last part is conventionally the local name of a provider, and local names of providers can also not contain any dashes or underscores. As Im writing a new script, I like to test on one file to start with, before I run the whole set. Below is the final version of the script. We could inspect the output from this manually, but it gets quite long I ran this in one of our repos, and there are 138 lines of output. Hi @qdupuy, I recommend taking this to the Community Forum - it should be easier to dive into this question there, and there are more viewers on the forum who could help troubleshoot and answer this question. An address is made up of two parts: [module path][resource spec] [module path][resource spec] Copy In some contexts Terraform might allow for an incomplete resource address that My terraformrc file content my credential. ADDRESS must be a valid resource address. With this format, there is no way to publish module with a provider which contains hyphen. Can you say a little more about what you've experienced, ideally including some reproduction steps, so we can understand how what you saw relates to the problem we've been discussing in this issue? Whenever you add a new module to a configuration, Terraform must install the module before it can be used. In my earlier research I didn't actually arrive at a clear explanation for that, but I did still replicate the previous rules because my goal was to refactor the existing implementation rather than to change its behavior: Re-reading this I think I actually made an error in the commentary I left here. Terraform parses "${var.name}-learn" as your variable name in the interpolation shorthand with the hardcoded -learn string appended to form a custom value. One additional constraint which they don't seem to mention, is that the system path segment for external hosts must not contain any dashes for compatibility with various systems. This is, // what we historically called "provider" but never actually enforced as, // being a provider address, and now _cannot_ be a provider address because. In order to access this module through their registry, the system segment will need to be renamed to only contain characters within the set [0-9a-z]. This is required if source_address_prefixes is not specified. So in this sense, every Terraform configuration is part of a module. // the registry source parse error gets returned to the caller, // which is annoying but has been true for many releases, // without it posing a serious problem in practice. However, if I use the git reference like this : The problem is always present and it is quite painful. """, #!/usr/bin/env python fix provider name validation in module URL to download from a registry, Fixes #29532: fix provider name validation in module URL to download from a registry, has consequently been used prominently in official provider documentation, https://registry.terraform.io/modules/claranet/diagnostic-settings/azurerm/latest, https://registry.terraform.io/modules/claranet/app-gateway/azurerm/latest, addrs: Expose the registry address parser's error messages, fix "target system" segment for module URLs in registry. We need to start by finding all our Terraform files. Module Sources - Terraform - W3cubDocs Module Sources As documented in the Usage section, the only required parameter when using a module is source. Hands-on: Try the Reuse Configuration with Modules tutorials. This of course says nothing specific about dashes, but I think that's just because idiomatic names within Terraform itself always use underscores to separate words, and the Terraform language permits dashes in identifiers only to make it easier to write configuration settings for remote systems that have different naming conventions. resource_type.resource_name[instance index]. I happened to do some refactoring of the address-parsing codepaths recently and so I ended up reading back through the history of registry module address parsing and adding some notes in the code based on what I learned, which I'll summarize here in the hope it helps with thinking about what we might do in response to this issue. I'm going to lock this issue because it has been closed for 30 days . What led you to try installing this module with provider gcp-beta? matches only resources in the root module. are using which parses resource addresses. A Terraform module is a set of Terraform configuration files in a single directory. It's designed to behave as a drop-in replacement for the hashicorp/google provider, and so the way it uses a dash in its source address ends up skirting around all of the assumptions I've mentioned because provider source addresses appear only in the source argument inside provider_requirements, whereas the rest of the module uses a local name chosen entirely by the module author. By Alex Chan. In those cases, the meaning depends on the context, Regarding what you said, it might be due to the fact that private registry has a domain name in their source and so, the parsing is not done the same way as the public registry. Ahh yes in a later version of Terraform weve added a more specific error message for this situation, but older versions had only this generic error message for any failure to parse a registry module address. A module can call other modules, which lets you include the child module's . Sorry again for the noise and thanks for your replies. Validate your configuration terraform fmt only parses your HCL for interpolation errors or malformed resource definitions, which is why you should use . In Terraform, you can use modules to define a reusable collection of resources. This is a local cache of all the modules youre using, created by terraform get. The most important quirk here is that Terraform v0.10 originally introduced the module registry syntax in a way that was ambiguous with previously-supported local file path syntax, and so it employed a model of first attempting to parse as a registry address and then falling back to a local file path if it encountered a syntax error. Im not going to pull it out as a generator right now, but Ive done it below.). Sign in The hashicorp/google-beta provider has emerged as a rather interesting exception to this rule. Import will find the existing resource from ID and import it into your Terraform state at the given ADDRESS. If you like what I do, perhaps say thanks? GitLab Pages for source installations Health Check Incident management rate limits Instance template repository . I would speculate (but have no evidence) that the current constraint on "remote system" names in module addresses was originally following the precedent that we required provider names to consist only of letters and digits, even though we've relaxed that into only a default assumption rather than a requirement in subsequent versions of the language. Many users will configure only one, for either . the module if a single module, or all instances of a module if a module has multiple instances. Tags such as 'VirtualNetwork', 'AzureLoadBalancer' and 'Internet' can also be used. I do lean slightly towards the documentation bug angle here, because I don't really see a clear path to a backward-compatible language change, but I'm curious to hear if others have ideas about how we could approach this as an enhancement. A Terraform module is a collection of configuration files that represent a single resource or multiple resources that are used together. In earlier versions, a resource spec Terraform is a tool for doing infrastructure as code everything that defines our AWS resources is kept as text files in a Git repo, alongside our application source code. It walks a directory tree, and generates tuples (dirpath, dirnames, filenames) for each directory dirpath in the tree, what directories and files does it contain? We have a lot of modules that use local paths, and after Id fixed this a few times, I decided to find all the places where we had these ambiguous sources, and fix them all at once. That being said, I understand well that there's no easy way out about this. For example, maybe youre creating some S3 buckets, and you want every bucket to have the same access policy. A Terraform module is a collection of standard configuration files in a dedicated directory. Lets open those files and see what they contain. From one day to the next, I encounter the following problem on my modules : Im using terraform registry of gitlab, my personnal token is good. If I was running in a big codebase, I could split the messages about invalid HCL and ambiguous module sources, and inspect them separately. Because theres only one loop, I can process one file and then break. The above explains why Terraform returns an unhelpful error in this situation, but it doesn't explain why the "remote system" portion of the address (what we previously called "provider", but never actually enforced it being a provider name in practice) has a more restrictive validation rule than the other two parts. Hence, the source field is given a path to the module folder as shown below: module "local-module" { source = "../local-module" <snip> } The new version has some breaking changes, including a new version of HCL, the markup language used to write Terraform code. module "MODULE_NAME" { source = "URL-OR-LOCAL-PATH-TO-THE-DIRECTORY" version = "VERSION" . } I hope that (aside from the error I described above) the commentary here is useful in thinking through some of the implications of doing so. Sign in This helps our maintainers find and focus on the active issues. ID is dependent on the resource type being imported. Its a bit neater than what I actually ran, because Ive tidied it up for the blog post, but its the same basic structure. Thanks again. Ive mentioned before that we use Terraform to manage our infrastructure at Wellcome. Is your module registry host literally x here, or did you just mask the real hostname for sharing in the forum? I doubt many people want this exact script, but I hope youll learn something useful from the write-up anyway. So here we're, // using some regular expressions from the original module source, // implementation, rather than using the IDNA rules as we do in, "must be between one and 64 ASCII letters or digits", // We also skip normalizing the name to lowercase, because we historically, // didn't do that and so existing module registries might be doing. My version is well present in the registry. Terraform modules encapsulate groups of resources dedicated to one task, reducing the amount of code you have to develop for similar infrastructure components. Adding ./ or ../ works fine in 0.11, so you can do this even if you have no immediate plans to upgrade. count = 2. source = "./module". } I tried all the ways below. Over in #30053 I've implemented the partial solution I described above of using the presence of the version argument as a heuristic to show a registry-address-specific error message instead of treating an invalid registry address as if it were a direct remote module source. The Terraform Cloud documentation is outside of my typical scope, so I'll let the usual documentation authors be the ones to review that change, but for what it's worth it seems like a reasonable set of updates to me! With all of this said, it does seem like our compatibility promises may be a practical blocker for any change to the registry module address syntax, and so we might find that the best we can do here is just document that requirement more explicitly in all of the relevant places, including in the module registry protocol documentation. IMHO there's a bug here because the behavior is not the same if we're using the Terraform public registry or a private one. With this source code (after republishing the module without hyphen in the registry), everything works fine: I publish modules very often in the Terraform public registry and it' possible to have hyphen in the module names. By clicking Sign up for GitHub, you agree to our terms of service and Tags may not be used. If not, you can manually write credentials blocks.. You can have multiple credentials blocks if you regularly use services from multiple hosts. If we were to relax the rules then this function would be the place to do it. Its not important for this task, so lets skip it. Run the below command to navigate to your main project directory ( ~/terraform_project) cd ~/terraform_project 2. # -*- encoding: utf-8, """ source_address_prefixes - (Optional) List of source address prefixes. A module is a container for multiple resources that are used together.. Every Terraform configuration has at least one module, known as its root module, which consists of the resources defined in the .tf files in the main working directory. Although its more verbose, it doesnt rely on knowing what an empty value looks like in this context, so its more future-proof against changes to the output of hcl.load. Here is terraform apply for command for running/applying single resource - terraform apply -target=module.module-1.aws_instance.ec2_example Let breakdown the command furthermore to understand it - module - In case if you are using modules in your terraform project then you should add the prefix module Generates paths to all the .tf files under the current directory. An example of the module keyword delineating between two modules that have multiple instances: Module index only applies to modules in Terraform v0.13 or later. You may have written a Terraform configuration file that deployed multiple cloud resources, like a network, public IP address, and virtual machine. It takes the form: An address without a resource spec, i.e. Terraform v1.2.x v1.1 and earlier Resource Addressing A resource addressis a string that identifies zero or more resource instances in your overall configuration. This site is licensed as a mix of CC-BY and MIT. My colleague @xp-1000 has kindly notified me that I was completely off topic here since my issue is about the name of the module and not the provider . Checking the version. Every module declared in a Terraform configuration must come from a source. This helps our maintainers find and focus on the active issues. Sign up for a free GitHub account to open an issue and contact its maintainers and the community. I originally wrote modules = tf.get("module", {}), then replaced it with try except KeyError. I'm able to reproduce this, but I'm not sure it's a valid bug. Double fail for me. The source parameter tells Terraform where the module can be found. The name of this provider is in format -. Were starting to upgrade our Terraform setup to Terraform 0.12. In some contexts Terraform might allow for an incomplete resource address that One particular concern is that it might cause existing modules containing legacy-style filesystem paths (which go-getter is currently handling) to be understood instead as containing module registry paths, which would be a breaking change not permitted under the Terraform 1.0 Compatibility Promises. Each module block must have a source attribute declaring a relative path that points to the folder with the configuration files. without a module path prefix would match resources with the same type and name To address all resources of a particular module instance, include the module index in the address,
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