Cloud Provisioning Tool
Sceptre is a tool to drive AWS CloudFormation. It automates away some of the more mundane, repetitive and error-prone tasks, allowing you to concentrate on building better infrastructure.
- Code reusability by separating a stack’s template and its configuration
- Support for templates written in JSON, YAML, Jinja2 or Python DSLs such as Troposphere
- Dependency resolution by passing of stack outputs to parameters of dependent stacks
- Environment support by bundling related stacks into logical groups (e.g. dev and prod)
- Environment-level commands, such as creating multiple stacks with a single command
- Fast, highly parallelised builds
- Built in support for working with stacks in multiple AWS accounts
- Infrastructure visibility with meta-operations such as stack querying protection
- Support for inserting dynamic values in templates via customisable resolvers
- Support for running arbitrary code as hooks before/after stack builds
Sceptre organises stacks into environments. Each stack is represented by a YAML configuration file stored in a directory which represents the environment. Here, we have two stacks, vpc and subnets, in an environment named dev:
$ tree . ├── config │ └── dev │ ├── config.yaml │ ├── subnets.yaml │ └── vpc.yaml └── templates ├── subnets.py └── vpc.py
We can create a stack with the create-stack command. This vpc stack contains a VPC:
$ sceptre create-stack dev vpc dev/vpc - Creating stack dev/vpc VirtualPrivateCloud AWS::EC2::VPC CREATE_IN_PROGRESS dev/vpc VirtualPrivateCloud AWS::EC2::VPC CREATE_COMPLETE dev/vpc sceptre-demo-dev-vpc AWS::CloudFormation::Stack CREATE_COMPLETE
The subnets stack contains a subnet which must be created in the VPC. To do this, we need to pass the VPC ID, which is exposed as a stack output of the vpc stack, to a parameter of the subnets stack. Sceptre automatically resolves this dependency for us:
$ sceptre create-stack dev subnets dev/subnets - Creating stack dev/subnets Subnet AWS::EC2::Subnet CREATE_IN_PROGRESS dev/subnets Subnet AWS::EC2::Subnet CREATE_COMPLETE dev/subnets sceptre-demo-dev-subnets AWS::CloudFormation::Stack CREATE_COMPLETE
Sceptre implements meta-operations, which allow us to find out information about our stacks:
$ sceptre describe-env-resources dev dev/subnets: - LogicalResourceId: Subnet PhysicalResourceId: subnet-445e6e32 dev/vpc: - LogicalResourceId: VirtualPrivateCloud PhysicalResourceId: vpc-c4715da0
Sceptre provides environment-level commands. This one deletes the whole dev environment. The subnet exists within the vpc, so it must be deleted first. Sceptre handles this automatically:
$ sceptre delete-env dev dev/subnets - Deleting stack dev/subnets Subnet AWS::EC2::Subnet DELETE_IN_PROGRESS dev/subnets - Stack deleted dev/vpc - Deleting stack dev/vpc VirtualPrivateCloud AWS::EC2::VPC DELETE_IN_PROGRESS dev/vpc - Stack deleted
Sceptre can be used from the CLI, or imported as a Python package.
Usage: sceptre [OPTIONS] COMMAND [ARGS]... Options: --version Show the version and exit. --debug Turn on debug logging. --dir TEXT Specify sceptre directory. --output [yaml|json] The formatting style for command output. --no-colour Turn off output colouring. --var TEXT A variable to template into config files. --var-file FILENAME A YAML file of variables to template into config files. --help Show this message and exit. Commands: continue-update-rollback Roll stack back to working state. create-change-set Creates a change set. create-stack Creates the stack. delete-change-set Delete the change set. delete-env Delete all stacks. delete-stack Delete the stack. describe-change-set Describe the change set. describe-env Describe the stack statuses. describe-env-resources Describe the env's resources. describe-stack-outputs Describe stack outputs. describe-stack-resources Describe the stack's resources. execute-change-set Execute the change set. generate-template Display the template used. get-stack-policy Display the stack policy used. launch-env Creates or updates all stacks. launch-stack Create or launch the stack. list-change-sets List change sets. lock-stack Prevent stack updates. set-stack-policy Set stack policy. unlock-stack Allow stack updates. update-stack Update the stack. update-stack-cs Update the stack via change set. validate-template Validate the template.
from sceptre.environment import Environment env = Environment("/path/to/sceptre_dir", "environment_name") stack = env.stacks["stack_name"] stack.create()
A full API description of the sceptre package can be found in the Documentation.
$ pip install sceptre
More information on installing sceptre can be found in our Installation Guide.
See our Contributing Guide.
Download the file for your platform. If you're not sure which to choose, learn more about installing packages.
|File Name & Checksum SHA256 Checksum Help||Version||File Type||Upload Date|
|sceptre-1.3.2-py2.py3-none-any.whl (47.0 kB) Copy SHA256 Checksum SHA256||py2.py3||Wheel||Nov 28, 2017|
|sceptre-1.3.2.tar.gz (74.5 kB) Copy SHA256 Checksum SHA256||–||Source||Nov 28, 2017|