ElasticBeanstalkのebextentionを使ってSSM Agentをインストール

ebextensions/99_ssm_agent.config

container_commands:
  01-install_ssm_agent:
    command: bash .ebextensions/scripts/install_ssm_agent.sh

files:
  "/etc/sudoers.d/root-ignore-tty":
    mode: "000644"
    owner: "root"
    group: "root"
    content: |
      Defaults:root !requiretty

ebextensions/scripts/install_ssm_agent.sh

#!/bin/bash
mkdir /tmp/ssm
curl https://amazon-ssm-ap-northeast-1.s3.amazonaws.com/latest/linux_amd64/amazon-ssm-agent.rpm -o /tmp/ssm/amazon-ssm-agent.rpm
sudo rpm -i /tmp/ssm/amazon-ssm-agent.rpm