Blueprint»

There are multiple ways to create stacks in Spacelift. Our recommended way is to use our Terraform provider and programmatically create stacks using an administrative stack.

However, some users might not be comfortable using Terraform code to create stacks, this is where Blueprints come in handy.

What is a Blueprint?»

A Blueprint is a template for a stack and its configuration. The template can contain variables that can be filled in by providing inputs when creating a stack from the Blueprint. The template can also contain a list of other resources that will be created when the stack is created.

You can configure the following resources in a Blueprint:

All stack settings including:
- Name, description, labels, Space
- Behavioral settings: administrative, auto-apply, auto-destroy, hooks, runner image etc.
VCS configuration
- Both default and Space-level VCS integrations
Vendor configuration for your IaaC provider
Environment variables, both non-sensitive and sensitive
Mounted files
Attaching Contexts
Attaching Policies
Attaching AWS integrations
Schedules:

Blueprint states»

There are two states: draft and published. Draft is the default state, it means that the blueprint "development" is in progress and not meant to be used. You cannot create a stack from a draft blueprint.

Published means that the blueprint is ready to be used. You can publish a blueprint by clicking the Publish button in the UI.

A published blueprint cannot be moved back to draft state. You need to clone the blueprint, edit it and publish it.

Permissions»

Blueprints permissions are managed by Spaces. You can only create, update and delete a blueprint in a Space you have admin access to but can be read by anyone with read access to the Space.

Once the blueprint is published and you want to create a stack from it, the read access will be enough as long as you have admin access to the Space where the stack will be created.

How to create a Blueprint»

Choose Blueprints on the left menu and click on Create blueprint. As of now, we only support YAML format. The template engine will be familiar for those who used GitHub Actions before.

The absolute minimum you'll need to provide is name, space, vcs and vendor; all others are optional. Here's a small working example:

inputs:
  - id: stack_name
    name: Stack name
stack:
  name: ${{ inputs.stack_name }}
  space: root
  vcs:
    branch: main
    repository: my-repository
    provider: GITHUB
  vendor:
    terraform:
      manage_state: true
      version: "1.3.0"

Preview of a Blueprint

The Create a stack button is inactive because the blueprint is in draft state. You can publish it by clicking the Publish button. After that, you can create a stack from the blueprint.

Now, let's look at a massive example that covers all the available configuration options:

Click to expand

inputs:
  - id: environment
    name: Environment to deploy to
    # type is not mandatory, defaults to short_text
  - id: app
    name: App name (used for naming convention)
    type: short_text
  - id: description
    name: Description of the stack
    type: long_text
    # long_text means you'll have a bigger text area in the UI
  - id: connstring
    name: Connection string to the database
    type: secret
    # secret means the input will be masked in the UI
  - id: tf_version
    name: Terraform version of the stack
    type: select
    options:
      - "1.3.0"
      - "1.4.6"
      - "1.5.0"
  - id: manage_state
    name: Should Spacelift manage the state of Terraform
    default: true
    type: boolean
  - id: destroy_task_epoch
    name: Epoch timestamp of when to destroy the resources
    type: number
options:
  # If true, a tracked run will be triggered right after the stack is created
  trigger_run: true
stack:
  name: ${{ inputs.app }}-{{ inputs.environment }}-stack
  space: root
  # The single-quote is needed to avoid YAML parsing errors since the question mark
  # and the colon is a reserved character in YAML.
  description: '${{ inputs.environment == "prod" ? "Production stack" : "Non-production stack" }}. Stack created at ${{ string(context.time) }}.'
  is_disabled: ${{ inputs.environment != 'prod' }}
  labels:
    - Environment/${{ inputs.environment }}
    - Vendor/Terraform
    - Owner/${{ context.user.login }}
    - Blueprint/${{ context.blueprint.name }}
    - Space/${{ context.blueprint.space }}
  administrative: false
  allow_promotion: false
  auto_deploy: false
  auto_retry: false
  local_preview_enabled: true
  protect_from_deletion: false
  runner_image: public.ecr.aws/mycorp/spacelift-runner:latest
  worker_pool: 01GQ29K8SYXKZVHPZ4HG00BK2E
  attachments:
    contexts:
      - id: my-first-context-vnfq2
        priority: 1
    clouds:
      aws:
        id: 01GQ29K8SYXKZVHPZ4HG00BK2E
        read: true
        write: true
      azure:
        id: 01GQ29K8SYXKZVHPZ4HG00BK2E
        read: true
        write: true
        subscription_id: 12345678-1234-1234-1234-123456789012
    policies:
      - my-push-policy-1
      - my-approval-policy-1
  environment:
    variables:
      - name: MY_ENV_VAR
        value: my-env-var-value
        description: This is my non-encrypted env var
      - name: TF_VAR_CONNECTION_STRING
        value: ${{ inputs.connstring }}
        description: The connection string to the database
        secret: true
    mounted_files:
      - path: a.json
        content: |
          {
            "a": "b"
          }
        description: This is the configuration of x feature
  hooks:
    apply:
      before: ["sh", "-c", "echo 'before apply'"]
      after: ["sh", "-c", "echo 'after apply'"]
    init:
      before: ["sh", "-c", "echo 'before init'"]
      after: ["sh", "-c", "echo 'after init'"]
    plan:
      before: ["sh", "-c", "echo 'before plan'"]
      after: ["sh", "-c", "echo 'after plan'"]
    perform:
      before: ["sh", "-c", "echo 'before perform'"]
      after: ["sh", "-c", "echo 'after perform'"]
    destroy:
      before: ["sh", "-c", "echo 'before destroy'"]
      after: ["sh", "-c", "echo 'after destroy'"]
    run:
      # There is no before hook for run
      after: ["sh", "-c", "echo 'after run'"]
  schedules:
    drift:
      cron:
        - "0 0 * * *"
        - "5 5 * * 0"
      reconcile: true
      ignore_state: true # If true, the schedule will run even if the stack is in a failed state
      timezone: UTC
    tasks:
      # You need to provide either a cron or a timestamp_unix
      - command: "terraform apply -auto-approve"
        cron:
          - "0 0 * * *"
      - command: "terraform apply -auto-approve"
        timestamp_unix: ${{ int(timestamp('2024-01-01T10:00:20.021-05:00')) }}
    delete:
      delete_resources: ${{ inputs.environment == 'prod' }}
      timestamp_unix: ${{ inputs.destroy_task_epoch - 86400 }}
  vcs:
    id: "github-for-my-org" # Optional, only needed if you want to use a Space-level VCS integration. Use the "Copy ID" button to get the ID.
    branch: main
    project_root: modules/apps/${{ inputs.app }}
    project_globs:
      - "terraform/**"
      - "k8s/**"
    namespace: "my-namespace" # The VCS organization name or project namespace
    # Note that this is just the name of the repository, not the full URL
    repository: my-repository
    provider: GITHUB_ENTERPRISE # Possible values: GITHUB, GITLAB, BITBUCKET_DATACENTER, BITBUCKET_CLOUD, GITHUB_ENTERPRISE, AZURE_DEVOPS, RAW_GIT
  vendor:
    terraform:
      manage_state: ${{ inputs.manage_state }}
      version: ${{ inputs.tf_version }}
      workspace: workspace-${{ inputs.environment }}
      use_smart_sanitization: ${{ inputs.environment != 'prod' }}
    ansible:
      playbook: playbook.yml
    cloudformation:
      entry_template_file: cf/main.yml
      template_bucket: template_bucket
      stack_name: ${{ inputs.app }}-${{ inputs.environment }}
      region: '${{ inputs.environment.contains("prod") ? "us-east-1" : "us-east-2" }}'
    kubernetes:
      namespace: ${{ inputs.app }}
    pulumi:
      stack_name: ${{ inputs.app }}-${{ inputs.environment }}
      login_url: https://app.pulumi.com
    terragrunt:
      use_smart_sanitization: true
      terraform_version: "1.5.7"
      terragrunt_version: "0.55.0"
      use_run_all: true

As you noticed if we attach an existing resource to the stack (such as Worker Pool, Cloud integration, Policy or Context) we use the unique identifier of the resource. Typically, there is a button for it in the UI but you can also find it in the URL of the resource.

Example of resource IDs

Attaching a VCS»

We have the following VCS systems available:

AZURE_DEVOPS
BITBUCKET_CLOUD
BITBUCKET_DATACENTER
GITHUB - this is the built-in GitHub integration that is used for SSO as well
GITHUB_ENTERPRISE - unlike the name suggests, it's not only for GitHub Enterprise, but for any additional GitHub installation
GITLAB
RAW_GIT - enables you to use any public Git repository. When using this, you need to provide the full URL for the repository by setting the repository_url field.

The vcs section is mandatory and you need to provide the branch, repository and provider. Additionally, if your VCS is anything other than GITHUB or RAW_GIT, you need to provide namespace as well. In GitHub, that's the organization name, in GitLab it's the group name, and in Bitbucket and Azure it's the project name.

If the VCS is RAW_GIT, you need to provide the repository_url instead of the namespace and repository.

The id is optional and only needed if you want to use a non-default integration. You can find the ID by clicking the Copy ID button in the VCS integration settings.

  vcs:
    id: "github-for-my-org" # Optional, only needed if you want to use a non-default VCS integration. Use the "Copy ID" button to get the ID.
    branch: main
    project_root: modules/networking
    project_globs: # Project globs do not mount the files or directories in your project root. They are used primarily for triggering your stack when for example there are changes to a module outside of the project root.
      - "terraform/**"
      - "k8s/**"
    namespace: "my-namespace" # The VCS organization name or project namespace.
    repository: my-repository # Name of the repository.
    repository_url: "https://www.github.com/my-namespace/my-repository" # This is only needed for RAW_GIT
    provider: GITHUB_ENTERPRISE # Possible values: AZURE_DEVOPS, BITBUCKET_CLOUD, BITBUCKET_DATACENTER, GITHUB, GITHUB_ENTERPRISE, GITLAB, RAW_GIT

Template engine»

We built our own variable substitution engine based on Google CEL. The library is available on GitHub.

Functions, objects»

In the giant example above, you might have noticed something interesting: inline functions! CEL supports a couple of functions, such as: contains, startsWith, endsWith, matches, size and a bunch of others. You can find the full list in the language definition. It also supports some basic operators, such as: *, /, -, +, relations (==, !=, <, <=, >, >=), &&, ||, !, ?: (yes, it supports the ternary operator 🎉) and in.

Other than the built-in operators and functions, we also added the string extensions to the evaluator, which include .replace(), .lowerAscii(), .split() and other methods. Example:

stack:
  name: ${{ inputs.app_name.replace(" ", "-") }}

Hint

It could be useful to look into the unit tests of the library. Look for the invocations of interpret function.

There is one caveat to keep in mind: keep the YAML syntax valid.

YAML syntax validity»

There are reserved characters in YAML, such as > (multiline string) | (multiline string), : (key-value pair marker), ? (mapping key) etc. If you use these characters as part of a CEL expression, you'll need to use quotes around the expression to escape it. For example:

Invalid template:

stack:
  name: ${{ 2 > 1 ? "yes" : "no" }}-my-stack

See how the syntax highlighter is confused?

Valid template:

stack:
  name: '${{ 2 > 1 ? "yes" : "no" }}-my-stack'

Results in:

stack:
  name: 'yes-my-stack'

Interaction with Terraform `templatefile`»

When using the Terraform templatefile function to generate a Blueprint template body, you can run into issues because the Blueprint template engine and templatefile both use $ as template delimiters. This can result in error messages like the following:

│ Error: Error in function call
│
│   on main.tf line 2, in output "content":
│    2:   value = templatefile("${path.module}/test.tftpl", {
│    3:     SPACE = "root"
│    4:   })
│     ├────────────────
│     │ path.module is "."
│
│ Call to function "templatefile" failed: ./test.tftpl:5,31-32: Missing key/value separator; Expected an equals
│ sign ("=") to mark the beginning of the attribute value.

To solve this you can use $${} to indicate that templatefile should not attempt to replace a certain piece of text.

In the following example, $${{ inputs.stack_name }} is escaped, whereas ${SPACE} is not:

inputs:
  - id: stack_name
    name: Stack name
stack:
  name: $${{ inputs.stack_name }}
  space: ${SPACE}
  vcs:
    branch: main
    repository: my-repository
    provider: GITHUB
  vendor:
    terraform:
      manage_state: true
      version: "1.3.0"

We can then use a call to templatefile like the following to render this template:

templatefile("${path.module}/test.tftpl", {
  SPACE = "root"
})

This results in the following output when the template is rendered:

inputs:
  - id: stack_name
    name: Stack name
stack:
  name: ${{ inputs.stack_name }}
  space: root
  vcs:
    branch: main
    repository: my-repository
    provider: GITHUB
  vendor:
    terraform:
      manage_state: true
      version: "1.3.0"

Variables»

Since you probably don't want to create stacks with the exact same name and configuration, you'll use variables.

Inputs»

Inputs are defined in the inputs section of the template. You can use them in the template by prefixing them with ${{ inputs. and suffixing them with }}. For example, ${{ inputs.environment }} will be replaced with the value of the environment input. You can use these variables in CEL functions as well. For example, trigger_run: ${{ inputs.environment == 'prod' }} will be replaced with trigger_run: true or trigger_run: false depending on the value of the environment input. To ensure an input variable is always recognized as a string, you can enclose the value in quotes "${{ inputs.environment }}".

The input object has id, name, description, type, default and options fields. The mandatory fields are id and name.

The id is used to refer to the input in the template. The name and the description are just helper fields for the user in the Stack creation tab. The type is the type of the input. The default is an optional default value of the input. The options is a list of options for the select input type.

Example:

inputs:
  - id: app_name
    name: The name of the app
stack:
  name: ${{ inputs.app_name }}-my-stack

Input types»

If the input type is not provided, it defaults to short_text. Other options are:

Type	Description
`short_text`	A short text input.
`long_text`	A long text input. Typically used for multiline strings.
`secret`	A secret input. The value of the input will be masked in the UI.
`number`	An integer input.
`boolean`	A boolean input.
`select`	A multi option input. In case of `select`, it is mandatory to provide `options`.
`float`	A float input.

An example including all the types:

inputs:
  - id: app_name
    name: The name of the stack
    # No type provided, defaults to short_text
  - id: description
    name: The description of the stack
    type: long_text
  - id: connstring
    name: Connection string to the database
    type: secret
  - id: number_of_instances
    name: The number of instances
    type: number
  - id: delete_protection
    name: Is delete protection enabled?
    type: boolean
  - id: environment
    name: The environment to deploy to
    type: select
    options:
      - prod
      - staging
      - dev
  - id: scale_factor
    name: The scale factor of the app
    type: float
    # You can optionally provide a default value
    default: 1.5

Context»

We also provide an input object called context. It contains the following properties:

Property	Type	Description
`time`	`google.protobuf.Timestamp`	UTC time of the evaluation of the template.
`random_string`	`string`	A random string of 6 characters (numbers and letters, no special characters).
`random_number`	`int`	A random number between 0 and 1000000.
`random_uuid`	`string`	A random UUID.
`user.login`	`string`	The login of the person who triggered the blueprint creation; as provided by the SSO provider.
`user.name`	`string`	The full name of the person who triggered the blueprint creation; as provided by the SSO provider.
`user.account`	`string`	The account subdomain of the user who triggered the blueprint creation.
`blueprint.name`	`string`	The name of the blueprint that was used to create the stack.
`blueprint.space`	`string`	The space ID of the blueprint that was used to create the stack.
`blueprint.created_at`	`google.protobuf.Timestamp`	The time when the blueprint was created.
`blueprint.updated_at`	`google.protobuf.Timestamp`	The time when the blueprint was last updated.
`blueprint.published_at`	`google.protobuf.Timestamp`	The time when the blueprint was published.
`blueprint.labels`	`list(string)`	The labels of the blueprint.

Here is an example of using a few of them:

stack:
  name: integration-tests-${{ inputs.app }}-${{ context.random_string }}
  description: |
    Temporary integration test stack for ${{ inputs.app }}. Deployed in ${{ context.time.getFullYear() }}.
    The base blueprint was created at ${{ string(context.blueprint.created_at) }}.
  labels:
    - owner/${{ context.user.login }}
    - blueprints/${{ context.blueprint.name }}
  environment:
    variables:
      - name: DEPLOYMENT_ID
        value: "${{ context.random_uuid }}"
  schedules:
    delete:
      delete_resources: ${{ context.random_number % 2 == 0 }} # Russian roulette
      timestamp_unix: ${{ int(context.time) + duration("30m").getSeconds() }} # Delete the stack in 30 minutes

Results in:

stack:
  name: integration-tests-my-app-vG3j3a
  description: |
    Temporary integration test stack for my-app. Deployed in 2023.
    The base blueprint was created at 2020-01-01T10:00:20.021-05:00.
  labels:
    - owner/johndoe
    - blueprints/my-blueprint
  environment:
    variables:
      - name: DEPLOYMENT_ID
        value: 6c9c4e3e-6b5d-4b3a-9c9c-4e3e6b5d4b3a
  schedules:
    delete:
      delete_resources: true # Russian roulette
      timestamp_unix: 1674139424 # Delete the stack in 30 minutes

Note that this is not a working example as it misses a few things (inputs section, vcs etc.), but it should give you an idea of what you can do.

Tip

What can you do with google.protobuf.Timestamp and google.protobuf.Duration? Check out the language definition, it contains all the methods and type conversions available.

Validation»

We do not validate drafted blueprints, you can do whatever you want with them. However, if you publish your blueprint, we'll make sure it includes the required fields and you'll get an error if it doesn't.

One caveat: we cannot validate fields that have variables because we don't know the value of the variable. On the other hand, if you try to create a stack from the blueprint and supply the inputs to the template, we'll be able to do the full validation. Let's say:

inputs:
  - id: timestamp
    name: Delete timestamp of the stack
    type: number
stack:
  schedules:
    delete:
      timestamp_unix: ${{ inputs.timestamp }}

We cannot make sure that the input variable is indeed a proper 10 digit epoch timestamp, we will only find out once you supply the actual input.

Schema»

The up-to-date schema of a Blueprint is available through a GraphQL query for authenticated users:

{
  blueprintSchema
}

Tip

Remember that there are multiple ways to interact with Spacelift. You can use the GraphQL API, the CLI, the Terraform Provider or the web UI itself if you're feeling fancy.

For simplicity, here is the current schema, but it might change in the future: