ecs-deploy 1.0.0

Simplify Amazon ECS deployments

ECS Deploy

Redeploying a service in Amazon ECS causes some effort, even if you just want to pull the most recent image versions. You have to create a new revision of the task definition and update the service to use the newly created revision.

This project simplyfies deployments on Amazon ECS by providing a convinience CLI tool for actions, which are executed pretty often.

TL;DR

Redeploy or scale a service in Amazon ECS as simple as this:

$ ecs deploy my-cluster my-service --tag latest
$ ecs scale my-cluster my-service 4

Installation

The project is availably on PyPI. Simply run:

$ pip install ecs-deploy

Configuration

As ecs-deploy is based on boto3 (the official AWS Python library), there are several ways to configure and store the authentication credentials. Please read the boto3 documentation for more details (http://boto3.readthedocs.org/en/latest/guide/configuration.html#configuration). The simplest way is by running:

$ aws configure

Alternatively you can pass the AWS credentials (via –access-key-id and –secret-access-key) or the AWS configuration profile (via –profile) as options when you run ecs.

Actions

Currently the following actions are supported:

deploy

Redeploy a service either without any modifications or with a new image, environment variable and/or command definition.

scale

Scale a service up or down and change the number of running tasks.

run

Run a one-off task based on an existing task-definition and optionally override command and/or environment variables.

Usage

For detailed information about the available actions, arguments and options, run:

$ ecs deploy --help
$ ecs scale --help

Examples

All examples assume, that authentication has already been configured.

Simple Redeploy

To redeploy a service without any modifications, but pulling the most recent image versions, run the follwing command. This will duplicate the current task definition and cause the service to redeploy all running tasks.:

$ ecs deploy my-cluster my-service

Deploy a new tag

To change the tag for all images in all containers in the task definition, run the following command:

$ ecs deploy my-cluster my-service -t 1.2.3

Deploy a new image

To change the image of a specific container, run the following command:

$ ecs deploy my-cluster my-service --image webserver nginx:latest

This will modify the webserver container only and change its image to “nginx:latest”.

Deploy several new images

The -i or –image option can also be passed several times:

$ ecs deploy my-cluster my-service -i webserver nginx:1.9 -i application django:latest

This will change the webserver’s container image to “nginx:1.9” and the application’s image to “django:latest”.

Set an environment variable

To add a new or adjust an existing environment variable of a specific container, run the following command:

$ ecs deploy my-cluster my-service -e webserver SOME_VARIABLE SOME_VALUE

This will modify the webserver container definition and add or overwrite the environment variable SOME_VARIABLE with the value “SOME_VALUE”. This way you can add new or adjust already existing environment variables.

Adjust multiple environment variables

You can add or change multiple environment variables at once, by adding the -e (or –env) options several times:

$ ecs deploy my-cluster my-service -e webserver SOME_VARIABLE SOME_VALUE -e webserver OTHER_VARIABLE OTHER_VALUE -e app APP_VARIABLE APP_VALUE

This will modify the definition of two containers. The webserver’s environment variable SOME_VARIABLE will be set to “SOME_VALUE” and the variable OTHER_VARIABLE to “OTHER_VALUE”. The app’s environment variable APP_VARIABLE will be set to “APP_VALUE”.

Modify a command

To change the command of a specific container, run the following command:

$ ecs deploy my-cluster my-service --command webserver "nginx"

This will modify the webserver container and change its command to “nginx”.

Scale a service

To change the number of running tasks and scale a service up and down, run this command:

$ ecs scale my-cluster my-service 4

Run a one-off task

To run a one-off task, based on an existing task-definition, run this command:

$ ecs run my-cluster my-task

You can define just the task family (e.g. my-task) or you can run a specific revision of the task-definition (e.g. my-task:123). And optionally you can add or adjust environment variables like this:

$ ecs run my-cluster my-task:123 -e my-container MY_VARIABLE "my value"

Run a task with a custom command

You can override the command definition via option -c or --command followed by the container name and the command in a natural syntax, e.g. no conversion to comma-separation required:

$ ecs run my-cluster my-task -c my-container "python some-script.py param1 param2"

Monitoring

With ECS deploy you can track your deployments automatically. Currently only New Relic is supported:

New Relic

To record a deployment in New Relic, you can provide the the API Key (Attention: this is a specific REST API Key, not the license key) and the application id in two ways:

Via cli options:

$ ecs deploy my-cluster my-service --newrelic-apikey ABCDEFGHIJKLMN --newrelic-appid 1234567890

Or implicitly via environment variables NEW_RELIC_API_KEY and NEW_RELIC_APP_ID

$ export NEW_RELIC_API_KEY=ABCDEFGHIJKLMN
$ export NEW_RELIC_APP_ID=1234567890
$ ecs deploy my-cluster my-service

Optionally you can provide an additional comment to the deployment via --comment "New feature X" and the name of the user who deployed with --user john.doe