YAML that works with SaltStack (tested/good):
eth2:
  network.managed:
    - enabled: True
    - type: eth
    - proto: none
    - ipaddr: 10.10.0.177
    - netmask: 255.255.254.0
    - dns:
      - 8.8.8.8
      - 8.8.4.4
    - gateway: 10.10.0.1

YAML that is output from php-yaml (causes errors in SaltStack):
eth2:
  network.managed:
    enabled: true
    type: eth
    proto: none
    ipaddr: 10.10.0.177
    netmask: 255.255.254.0
    dns:
      - 8.8.8.8
      - 8.8.4.4
    gateway: 10.10.0.1