inits.cloud

Nomad Job Scheduler

Sets up HashiCorp Nomad for container orchestration and job scheduling

Script Author

Rowan de Haas's avatar
Rowan de Haas
Script Author

Script Details

Created 11 months ago
Size 2 KB

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#cloud-config
package_update: true
package_upgrade: true

packages:
  - wget
  - unzip
  - docker.io

users:
  - name: nomad
    system: true
    shell: /bin/false
    home: /opt/nomad
    groups: docker

write_files:
  - path: /etc/nomad.d/nomad.hcl
    content: |
      datacenter = "dc1"
      data_dir = "/opt/nomad/data"
      log_level = "INFO"
      
      server {
        enabled = true
        bootstrap_expect = 1
      }
      
      client {
        enabled = true
        servers = ["127.0.0.1"]
      }
      
      ui_config {
        enabled = true
      }
      
      plugin "docker" {
        config {
          allow_privileged = false
        }
      }
    permissions: '0640'
    owner: nomad:nomad

  - path: /etc/systemd/system/nomad.service
    content: |
      [Unit]
      Description=Nomad
      Documentation=https://www.nomadproject.io/docs/
      Wants=network-online.target
      After=network-online.target
      
      [Service]
      Type=notify
      User=nomad
      Group=nomad
      ExecReload=/bin/kill -HUP $MAINPID
      ExecStart=/usr/local/bin/nomad agent -config /etc/nomad.d
      KillMode=process
      Restart=on-failure
      LimitNOFILE=65536

      [Install]
      WantedBy=multi-user.target

runcmd:
  # Download and install Nomad
  - cd /tmp
  - wget https://releases.hashicorp.com/nomad/1.6.0/nomad_1.6.0_linux_amd64.zip
  - unzip nomad_1.6.0_linux_amd64.zip
  - mv nomad /usr/local/bin/
  - chmod +x /usr/local/bin/nomad
  # Create directories
  - mkdir -p /opt/nomad/data
  - mkdir -p /etc/nomad.d
  - chown -R nomad:nomad /opt/nomad /etc/nomad.d
  # Start Docker
  - systemctl enable docker
  - systemctl start docker
  - usermod -aG docker nomad
  # Enable and start Nomad
  - systemctl enable nomad
  - systemctl start nomad
  # Configure firewall
  - ufw allow 4646/tcp
  - ufw allow 4647/tcp
  - ufw allow 4648/tcp

How to Use This Script

Cloud Provider Examples

Amazon EC2

aws ec2 run-instances
  --image-id ami-12345678
  --instance-type t3.micro
  --user-data file://script.yaml

DigitalOcean

doctl compute droplet create
  --image ubuntu-22-04-x64
  --size s-1vcpu-1gb
  --user-data-file script.yaml
  my-droplet

Google Cloud

gcloud compute instances create
  my-instance
  --metadata-from-file
  user-data=script.yaml