Ecs-Cmd
This is a command line application for interacting with AWS ECS. The standard AWS cli can be a bit cumbersome for some tasks. Ecs-cmd aims to simplify those tasks.
Installation
bash
gem install ecs_cmd
The gem uses the standard aws crendential chain for authentication actions. See https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-configure.html for reference.
Usage
```text $ ecs-cmd NAME ecs-cmd - Command utility for interacting with AWS ECS
SYNOPSIS ecs-cmd [global options] command [command options] [arguments…]
VERSION 0.1.3
GLOBAL OPTIONS –help - Show this message -r, –region=region - Set the aws region (default: us-east-1) –version - Display the program version
COMMANDS exec - Execute a Command Within a Service’s Container get - Get Info on Clusters and Services help - Shows a list of commands or help for one command logs - Tail Logs From a Service’s Container run-task - Run a One Off Task On an ECS Cluster shell - Open a Shell Inside a Service’s Container ssh - SSH into Host Task is Running On ```
Get Commands
These allow you to query information from ECS.
Get Clusters
text
$ ecs-cmd get clusters
+--------------------+--------------------------+----------+---------------+---------------+
| CLUSTER NAME | CONTAINER_INSTANCE_COUNT | SERVICES | RUNNING_TASKS | PENDING_TASKS |
+--------------------+--------------------------+----------+---------------+---------------+
| production | 20 | 39 | 82 | 0 |
| development | 1 | 2 | 1 | 0 |
+--------------------+--------------------------+----------+---------------+---------------+
Get Services
Prints an overview of the services in a given cluster.
```text $ ecs-cmd get services –help NAME services -
SYNOPSIS ecs-cmd [global options] get services [command options]
COMMAND OPTIONS -c, –cluster=cluster - cluster name (required, default: none) ```
text
$ ecs-cmd get services -c testing
+--------------------+---------------+---------------+---------------+
| SERVICE NAME | DESIRED_COUNT | RUNNING_COUNT | PENDING_COUNT |
+--------------------+---------------+---------------+---------------+
| datadog-agent | 1 | 0 | 0 |
| foo-bar | 1 | 1 | 0 |
+--------------------+---------------+---------------+---------------+
Get Service
Get information on a specific service in a cluster.
```text $ ecs-cmd get service –help NAME service -
SYNOPSIS ecs-cmd [global options] get service [command options]
COMMAND OPTIONS -c, –cluster=cluster - cluster name (required, default: none) -e, –[no-]events - get ecs events -s, –service=service - service name (required, default: none) -t, –[no-]task_definition - get current task definition for service ```
text
$ ecs-cmd get service -c production -s foo
+------+--------+---------------+---------------+---------------+-------------+-------------+
| NAME | STATUS | RUNNING COUNT | DESIRED COUNT | PENDING COUNT | MAX HEALTHY | MIN HEALTHY |
+------+--------+---------------+---------------+---------------+-------------+-------------+
| foo | ACTIVE | 2 | 2 | 0 | 200 | 50 |
+------+--------+---------------+---------------+---------------+-------------+-------------+
+----------------------------------------------------------------------+
| TASK DEFINITION |
+----------------------------------------------------------------------+
| arn:aws:ecs:us-east-1:xxxxxxxxxxxx:task-definition/foo-production:25 |
+----------------------------------------------------------------------+
+---------------------+--------------+
| INSTANCE ID | IP |
+---------------------+--------------+
| i-xxxxxxxxxxxxxxxxx | 10.0.230.1 |
| i-xxxxxxxxxxxxxxxxx | 10.0.220.3 |
+---------------------+--------------+
+-----------------+----------------------------------------------------------------------+
| DEPLOYMENTS | |
+-----------------+----------------------------------------------------------------------+
| id | ecs-svc/xxxxxxxxxxxxxxxxxxx |
| status | PRIMARY |
| task definition | arn:aws:ecs:us-east-1:xxxxxxxxxxxx:task-definition/foo-production:25 |
| desired count | 2 |
| pending count | 0 |
| running count | 2 |
| created at | 2018-12-07 09:44:59 -0800 |
| updated at | 2018-12-07 09:45:58 -0800 |
+-----------------+----------------------------------------------------------------------+
+------------------------------------------------------------------------------+---------------------+---------------+
| TASK_ID | INSTANCE_ID | IP |
+------------------------------------------------------------------------------+---------------------+---------------+
| arn:aws:ecs:us-east-1:xxxxxxxxxxxx:task/50a84065-4bcf-4450-9a3b-3ee411bb3fb0 | i-xxxxxxxxxxxxxxxxx | 10.20.205.150 |
+------------------------------------------------------------------------------+---------------------+---------------+
Logs
works for ec2 type services only
requires ssh access to instance and sudo or docker group membership
Streams logs from 1 of a services running tasks using the docker logs command
```text $ ecs-cmd logs –help NAME logs - Tail Logs From a Service’s Container
SYNOPSIS ecs-cmd [global options] logs [command options]
COMMAND OPTIONS -c, –cluster=cluster - cluster name (required, default: none) -l, –lines=lines - number of historical lines to tail (default: 30) -s, –service=service - service name (required, default: none) –[no-]sudo - use sudo for docker commands, necessary if not in docker group (default: enabled) ```
Run Task
Run a one off task in ECS. This will poll for the task to exit and report its exit code. This is handy for tasks like rails migrations in ci/cd pipelines. If a docker image is passed it will create a new revision of the task definition prior to running the task.
```text $ ecs-cmd run-task –help NAME run-task - Run a One Off Task On an ECS Cluster
SYNOPSIS ecs-cmd [global options] run-task [command options]
COMMAND OPTIONS -c, –cluster=cluster - cluster name (required, default: none) -d, –command=command - override task definition command (default: none) -i, –image=image - docker image to use for task (default: none) -n, –container-name=container name - container name (default: none) -t, –task-definition=arg - the task definition to use for task (required, default: none) ```
Exec
works for ec2 type services only and requires sudo or docker group membership
requires ssh access to instance
Run a command inside a container for a given service. If a shell is given as a command (e.g. sh)
an interactive login terminal will be opened.
```text $ ecs-cmd shell –help NAME exec - Open a Shell Inside a Service’s Container
SYNOPSIS ecs-cmd [global options] exec [command options] command
COMMAND OPTIONS -c, –cluster=cluster - cluster name (required, default: none) -s, –service=service - service name (required, default: none) –[no-]sudo - use sudo for docker commands, necessary if not in docker group (default: enabled) -u, –user=user - user name or uid of container user (default: root) ```
SSH
works for ec2 type services only
requires ssh access to instance
SSH onto a host where a container for a given service is running.
```text $ ecs-cmd ssh –help NAME ssh - SSH into Host Task is Running On
SYNOPSIS ecs-cmd [global options] ssh [command options]
COMMAND OPTIONS -c, –cluster=cluster - cluster name (required, default: none) -s, –service=service - service name (required, default: none) ```
Development
After checking out the repo, run bin/setup to install dependencies. Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.
To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.
Contributing
Bug reports and pull requests are welcome on GitHub at https://github.com/[USERNAME]/ecs_cmd. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the Contributor Covenant code of conduct.
License
The gem is available as open source under the terms of the MIT License.
Code of Conduct
Everyone interacting in the EcsCmd project’s codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.