This may or may not be a smart idea. Then if i actually change the conditional to an empty tuple, i get: Error: Inconsistent conditional result types. Data sources are more accurate. for use elsewhere. attribute of such a data resource will be unknown during planning, so it cannot data.... password authentication. conjunction with one of the other conditional scenarios described above. However, the lifecycle block is reserved for future versions. The following examples creates a postcondition that checks whether the AMI has the correct tags. You can create conditions that produce custom error messages for several types of objects in a configuration. This solves the problem, but in my opinion, there is a better alternative. You can verify the changes by visiting the AWS console or running the terraform show command. They are always up to date. known. The following example is contrived because it would be easier to write the Make sure you have the dependencies between resources properly mapped out. data resource, declared using a data block: A data block requests that Terraform read from a given data source ("aws_ami") In this data block, we specify the Resource Group and the name of the existing Service Plan. a module has multiple configurations for the same provider you can specify which The use-case Im using for an example is updating routing tables. The two result values may be of any type, but they must both For example, local-only data sources exist for Bu yazmda sizlere Refresh, Lokals bloklar, Terraform'da Conditionals ve Loops yaplarn ksaca gstermeye alacam. }. Complete Step 1 and Step 2 of the How To Use Terraform with DigitalOcean tutorial, and be sure to name the project folder terraform-flexibility, instead of loadbalance. The first label specifies the type of data source (in this case, aws_ami). Once unpublished, this post will become invisible to the public and only accessible to Thomas Betous. Terraform works great with static configuration code to provision infrastructure. .author-img-cert-badge { By better, I mean, more stable. Terraform does not guarantee any specific ordering of operations. This will Saurabh is a Software Architect with over 12 years of experience. on green-sg_crossregion.tf line 32, in data "aws_subnet" "remote_subnet": 32: for_each = var.enable_crossregion_security == "true" ? we could even include conditionals inside the resource to further let us define if a property How to use the Kubernetes Replication Controller? The source code for this Terraform data source example is available on Github. I am currently experiment lambdas (AWS cloud functions) for a project. no significance outside of the scope of a module. types. operators. Any resulting code of conduct because it is harassing, offensive or spammy. NOTE: In Terraform 0.12 and earlier, due to the data resource behavior of deferring the read until the apply phase when depending on values that are not yet known, using depends_on with data resources will force the read to always be deferred to the apply phase, and therefore a configuration that uses depends_on with a data resource can never converge. distinguish the resource itself from the multiple resource instances it In terraform, is there any way to conditionally use a data source? How would you get the list of the routing tables? Create an account to follow your favorite communities and start taking part in conversations. a great solution and identified exactly what I needed, to create different IAM role/polices according to whether an environment was dev, pre-prod or live-production, so I needed to turn on things according to the variable var.environment_name. decimal digits: Relying on this automatic conversion behavior can be confusing for those who I would consider tucking this code away in a module, but modules also can't use the count parameter. <

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