prometheus-cloudconfig

#cloud-config

users:
  - name: "prometheus"
    system: true
    primary-group: "prometheus"
    groups:
      - "prometheus"
      - "docker"
coreos:
  update:
    reboot-strategy: off
  units:
    - name: format-ephemeral.service
      command: start
      content: |
        [Unit]
        Description=Formats the ephemeral drive
        After=dev-xvdb.device
        Requires=dev-xvdb.device
        [Service]
        Type=oneshot
        RemainAfterExit=yes
        ExecStart=/usr/sbin/wipefs -f /dev/xvdb
        ExecStart=/usr/sbin/mkfs.xfs -f /dev/xvdb
    - name: mnt-prometheus.mount
      command: start
      content: |
        [Unit]
        Description=Mount ephemeral to /mnt/prometheus
        Requires=format-ephemeral.service
        After=format-ephemeral.service
        [Mount]
        What=/dev/xvdb
        Where=/mnt/prometheus
        Type=ext4
    - name: chown-prometheus-data-dir.service
      command: start
      content: |
        [Unit]
        Description=Make prometheus user owner of prometheus data dir
        After=mnt-prometheus.mount
        Requires=mnt-prometheus.mount
        Before=prometheus.service
        [Service]
        Type=oneshot
        RemainAfterExit=yes
        ExecStart=/usr/bin/chown prometheus.prometheus /mnt/prometheus
    - name: prometheus.service
      runtime: true
      command: start
      content: |
        [Unit]
        Description=Prometheus
        After=docker.service
        Requires=docker.service

        [Service]
        Restart=always
        ExecStartPre=/usr/bin/docker pull prom/prometheus
        ExecStart=/usr/bin/docker run -p 9090:9090 -v /mnt/prometheus:/prometheus --name prometheus prom/prometheus
        ExecStop=/usr/bin/docker rm -f prometheus