06/12/2020: Add AWS SSM Agent on Fedora CoreOS
This work is being done at the request of the Enterprise Container Working Group (ECWG) of the Office of Information and Technology (OIT - https://www.oit.va.gov/) at the Department of Veteran Affairs.
This article shows how to install the AWS SSM Agent on Fedora CoreOS. My goal was to alert when ‘denied’ messages appear in audit logs. My first step towards this goal was to install the SSM agent to allow the server’s
/var/log/audit/audit.log file to appear in the CloudWatch Logs console.
After I did this work, I realized that I should have started with the CloudWatch agent. Ah well.
The first step is entirely in your hands. Clone https://github.com/aws/amazon-ssm-agent.git and build the binary files. Whatever directory you use will become the
ssm_binary_dir in the ansible command.
ansible-playbook command looks like this.
core is the ssh user for Fedora CoreOS.
python3 ansible-playbook \ --extra-vars ssm_binary_dir=/data/projects/amazon-ssm-agent/bin \ -i inventory \ -u core \ playbook.harden.yml
inventory file with the IP address of the remote server.
cat <<EOF > inventory [fcos] 18.104.22.168 EOF
I add the PEM file to SSH to simplify my life. I learned that having PEM files in
~/.ssh slows the connection process and can cause trouble if there are too many. That’s I am using my
Now here is the playbook.
cat <<EOF > playbook.aws-ssm-agent.yml --- - hosts: fcos gather_facts: false vars: ansible_python_interpreter: '/usr/bin/python3' tasks: # ########## # # Amazon SSM Agent # ########## - name: Copy Amazon SSM Agent become: yes copy: src: "" dest: /usr/local/bin mode: 755 force: no with_fileglob: - "/linux_amd64/*" - name: Make logging directory become: yes file: path: /var/log/amazon/ssm state: directory - name: Make config directory become: yes file: path: /etc/amazon/ssm state: directory - name: Copy Amazon SSM Agent JSON become: yes copy: src: "/amazon-ssm-agent.json.template" dest: /etc/amazon/ssm/amazon-ssm-agent.json - name: Copy Amazon SSM Agent JSON become: yes copy: src: "/seelog_unix.xml" dest: /etc/amazon/ssm - name: Create SSM service file. become: yes copy: dest: /etc/systemd/system/amazon-ssm-agent.service content: | [Unit] Description=amazon-ssm-agent [Service] Type=simple WorkingDirectory=/usr/local/bin ExecStart=/usr/local/bin/amazon-ssm-agent KillMode=process Restart=on-failure RestartSec=15min [Install] WantedBy=network-online.target - name: Enable SSM service become: yes service: name: amazon-ssm-agent enabled: yes state: started EOF
You now have all of the pieces to deploy the AWS SSM Agent on Fedora CoreOS.
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