kosmo

AWS infrastructure deployment tool. Uses cloudformation currently to deploy stacks along with artifacts.

Kosmo consists of 3 parts

• KosmoForm: base building blocks of aws cloudformation stacks.
• KosmoSTL: standard template library for common aws resource groups.
• KosmoLib: Library of utitliy objects that Kosmo provides to make deployment easier

To use kosmo you have to create a kosmo definition file and then pass that to the kosmo binary, which will do the rest for you.

Setting up kosmo

Run:

kosmo --profile <aws-cli-profile> init

This will bind a kosmo s3 bucket to your aws-cli-profile. And you may then start deploying to that aws account.

The kosmo bucket is used to keep track of various meta information related to artifacts and cloudformation templates and also to store the actual data.

After initializing kosmo you will want to create a kosmo definition file:

Kosmo definition file

A kosmo definition file has the following format:

module.exports = function(kosmo) {
    return {
        name: 'project-name',
        artifacts: [],
        components: [],
    };
};

That of course does nothing. For Kosmo to do something you can add an artifact:

module.exports = function(kosmo) {
    var artifact = {
        name: 'my-artifact',
        region: 'eu-west-1',
        build: function() {
            return kosmo.lib.createEbArtifact(...)
        },
    };

    return {
        name: 'project-name',
        artifacts: [artifact],
        components: [],
    };
};

Each artifact describes which region this artifact belongs to. This can be important for EB apps for eg. And implements a build function that returns a kosmo artifact object. You can obtain this in various ways, for eg with the kosmo lib. But now you need a place to put that artifact, so you can add a component to your project:

module.exports = function(kosmo) {
    var artifact = {
        name: 'my-artifact',
        build: function() {
            return kosmo.lib.createEbArtifact(...)
        },
    };

    var component = {
        name: 'my-component'
        build: function() {
            return kosmo.lib.findArtifact('my-artifact').then(artifact => {
                var eb = kosmo.stl.EBApp(artifact, ...);
                return {
                    resources: [
                        eb,
                    ],
                };
            });
        },
    };

    return {
        name: 'project-name',
        artifacts: [artifact],
        components: [component],
    };
};

A component also describes a region that the component must be in, and implements a build function. In this build function we first find the artifact that we (should have) built earlier, and then we use kosmo stl to create an EB application and pass in the artifact. Every kosmo component must return a object that has an array of resources. Resources can be either created via kosmo stl or kosmo form.

Building the artifact

To build the artifact you specify your profile that you initialized earlier and then the artifact:

kosmo --profile <aws-cli-profile> build project-name/my-artifact

This will run your build command, and if kosmo gets an artifact back, it will upload it to your accout in the necessary place.

Deploying the component

kosmo --profile <aws-cli-profile> deploy project-name/my-component

And if all went well, you should have a cloudformation stack with an artifact running in your account.