ecsctl

kubectl-style command line tool for AWS EC2 Container Service (ECS)

Installation

pip install ecsctl

Purpose

A convenient command line tool to view ECS cluster status and do troubleshooting.

This tool is trying to provide similar functionality of kubectl for kubernetes.

Of course, ECS and kubernetes are so different. Many features on kubernetes are not possible here in ECS.

Some AWS official projects to check out:

• ecs-cli
• aws-cli ecs command

Usage

Cluster

List nodes:

% ecsctl get clusters
NAME     STATUS      RUNNING    PENDING    INSTANCE COUNT
default  ACTIVE            3          0                 2

Get cluster details:

% ecsctl describe cluster mycluster

Create/delete cluster:

% ecsctl create cluster mycluster

Container Instances (nodes)

List nodes:

% ecsctl get nodes --cluster mycluster
INSTANCE ID                           EC2 INSTANCE ID      STATUS      RUNNING COUNT
00000000-1111-2222-3333-444444444444  i-abcdef123456abcde  ACTIVE                  1

Get node detail:

% ecsctl describe node 00000000-1111-2222-3333-444444444444

Drain/undrain node:

% ecsctl drain 00000000-1111-2222-3333-444444444444

Services

List services:

% ecsctl get services

List services in certain order:

% ecsctl get services --sort-by "createdAt"

Delete a service:

% ecsctl delete service badservice

Delete a service (even if it has desiredCount > 0):

% ecsctl delete service badservice --force

Run container quick start

% ecsctl run mycontainer --image busybox
mycontainer

% ecsctl get services
NAME             TASK DEFINITION      DESIRED    RUNNING  STATUS    AGE
mycontainer-svc  mycontainer:1              1          0  ACTIVE    10 seconds ago

Run docker exec on containers (Requires customizing docker daemon to listen on internal addresses)

% ecsctl get tasks
TASK ID                               STATUS    TASK DEFINITION    AGE
42f052c4-80e9-411d-bea2-407b0b4a4b0b  PENDING   mycontainer:1      2 minutes ago

% ecsctl exec 42f052c4-80e9-411d-bea2-407b0b4a4b0b date
Fri May 26 00:13:24 PDT 2017

% ecsctl exec -it 42f052c4-80e9-411d-bea2-407b0b4a4b0b /bin/bash
root@container:/# (interactive)

Configure docker daemon to allow ecsctl exec

NOTE: this does not work with ECS Fargate.

1. Let docker daemon listen on TCP ports (required)

Add options like -H tcp://0.0.0.0:MYDOCKERPORT or environment variable DOCKER_HOST=tcp://0.0.0.0:MYDOCKERPORT to configure docker daemon. See dockerd documentation for more information.

2. Security enhancement: dropping traffic from ECS containers to docker daemon.

   iptables --insert INPUT 1 \
            --in-interface docker+ \
            --protocol tcp \
            --destination-port MYDOCKERPORT \
            --jump DROP
   

Configs

Set default cluster name (equivalent to --cluster option)

% ecsctl config set cluster mycluster

Set default docker daemon port

% ecsctl config set docker_port 2375