cloud-config

#cloud-config

coreos:
  etcd2:
    # generate a new token for each unique cluster from https://discovery.etcd.io/new:
    discovery: https://discovery.etcd.io/XXXXX
    # multi-region deployments, multi-cloud deployments, and Droplets without
    # private networking need to use $public_ipv4:
    advertise-client-urls: http://$private_ipv4:2379,http://$private_ipv4:4001
    initial-advertise-peer-urls: http://$private_ipv4:2380
    # listen on the official ports 2379, 2380 and one legacy port 4001:
    listen-client-urls: http://0.0.0.0:2379,http://0.0.0.0:4001
    listen-peer-urls: http://$private_ipv4:2380
  fleet:
    public-ip: $private_ipv4   # used for fleetctl ssh command
  units:
    - name: systemd-sysctl.service
      command: restart
    - name: etcd2.service
      command: restart
    - name: fleet.service
      command: restart
    - name: create-swap.service
      command: start
      runtime: true
      content: |
        [Unit]
        Description=Create swap file
        Before=swap.service

        [Service]
        Type=oneshot
        Environment="SWAPFILE=/4GiB.swap"
        ExecStart=/usr/bin/touch ${SWAPFILE}
        ExecStart=/usr/bin/chattr +C ${SWAPFILE}
        ExecStart=/usr/bin/fallocate -l 4096m ${SWAPFILE}
        ExecStart=/usr/bin/chmod 600 ${SWAPFILE}
        ExecStart=/usr/sbin/mkswap ${SWAPFILE}

        [Install]
        WantedBy=multi-user.target
    - name: swap.service
      command: start
      content: |
        [Unit]
        Description=Turn on swap

        [Service]
        Type=oneshot
        Environment="SWAPFILE=/4GiB.swap"
        RemainAfterExit=true
        ExecStartPre=/usr/sbin/losetup -f ${SWAPFILE}
        ExecStart=/usr/bin/sh -c "/sbin/swapon $(/usr/sbin/losetup -j ${SWAPFILE} | /usr/bin/cut -d : -f 1)"
        ExecStop=/usr/bin/sh -c "/sbin/swapoff $(/usr/sbin/losetup -j ${SWAPFILE} | /usr/bin/cut -d : -f 1)"
        ExecStopPost=/usr/bin/sh -c "/usr/sbin/losetup -d $(/usr/sbin/losetup -j ${SWAPFILE} | /usr/bin/cut -d : -f 1)"

        [Install]
        WantedBy=multi-user.target
write_files:
  - path: /etc/sysctl.d/swap.conf
    permissions: 0644
    owner: root
    content: |
      vm.swappiness=10
      vm.vfs_cache_pressure=50