Push to ECR Without Logging In (aws ecr get-login)

Overview

Using the credential-helper introduced in Docker version 1.11, we will set up a mechanism
to push to ECR safely and easily.

Upgrade to Docker ver 1.11 or higher

$ sudo apt-key adv --keyserver hkp://p80.pool.sks-keyservers.net:80 --recv-keys 58118E89F3A912897C070ADBF76221572C52609D
$ sudo sh -c "echo deb https://apt.dockerproject.org/repo ubuntu-trusty main\
> /etc/apt/sources.list.d/docker.list"
$ sudo apt-get purge lxc-docker docker
$ sudo apt-get update
$ sudo apt-get install docker-engine
$ sudo service docker restart

pull Dockerized ECR credential helper

$ docker pull pottava/amazon-ecr-credential-helper

Authentication Setup

Choose one of the following three options.
For EC2, 1. Authenticate with an instance role is the cleanest and keeps the code easy to follow.

1. Authenticate with an instance role
2. Authenticate with credentials
3. Authenticate with environment variables

1. Authenticate with an instance role

docker run --rm \
  -e REGISTRY=123457689012.dkr.ecr.us-east-1.amazonaws.com \
  pottava/amazon-ecr-credential-helper

sudo sh -c 'cat << EOF > /usr/bin/docker-credential-ecr-login
#!/bin/sh
SECRET=\$(docker run --rm \\
  -e METHOD=\$1 \\
  -e REGISTRY=\$(cat -) \\
  pottava/amazon-ecr-credential-helper)
echo \$SECRET | grep Secret
EOF'

sudo chmod +x /usr/bin/docker-credential-ecr-login

2. Authenticate with credentials

docker run --rm \
  -e REGISTRY=123457689012.dkr.ecr.us-east-1.amazonaws.com \
  -v $HOME/.aws/credentials:/root/.aws/credentials \
  pottava/amazon-ecr-credential-helper

sudo sh -c 'cat << EOF > /usr/bin/docker-credential-ecr-login
#!/bin/sh
SECRET=\$(docker run --rm \\
  -e METHOD=\$1 \\
  -e REGISTRY=\$(cat -) \\
  -v $HOME/.aws/credentials:/root/.aws/credentials \\
  pottava/amazon-ecr-credential-helper)
echo \$SECRET | grep Secret
EOF'

sudo chmod +x /usr/bin/docker-credential-ecr-login

3. Authenticate with environment variables

• Set the environment variables

export AWS_ACCESS_KEY_ID=AKIAIOSFODNN7EXAMPLE
export AWS_SECRET_ACCESS_KEY=wJalrXUtnFEMI/K7MDENG/bPxRfiCYEXAMPLEKEY

docker run --rm \
  -e REGISTRY=123457689012.dkr.ecr.us-east-1.amazonaws.com \
  -e AWS_ACCESS_KEY_ID \
  -e AWS_SECRET_ACCESS_KEY \
  pottava/amazon-ecr-credential-helper

sudo sh -c 'cat << EOF > /usr/bin/docker-credential-ecr-login
#!/bin/sh
SECRET=\$(docker run --rm \\
  -e METHOD=\$1 \\
  -e REGISTRY=\$(cat -) \\
  -e AWS_ACCESS_KEY_ID \\
  -e AWS_SECRET_ACCESS_KEY \\
  pottava/amazon-ecr-credential-helper)
echo \$SECRET | grep Secret
EOF'
sudo chmod +x /usr/bin/docker-credential-ecr-login

Credential Storage Setup

mv $HOME/.docker/config.json $HOME/.docker/config.json.org

cat << EOF > $HOME/.docker/config.json
{
    "credsStore": "ecr-login"
}
EOF

With this, you are freed from aws ecr get-login ♪