anchor.diff:  ----
   
   <1> Other fields on the `DeploymentConfig` are omitted
  +<2> The username to use with the service.
  +<3> The passphrase to use with the service.
  +<4> The database name.
   
   ====
   
   === External Database Environment Variables
   
  -Using an external service in your application is just like using an internal service. Your
  -application will be injected with environment variables for the service and the additional
  -environment variables with the credentials described above. In our example, The 'helloworld'
  -container will receive the following environment variables:
  +Using an external service in your application is just like using an internal
  +service. Your application will be injected with environment variables for the
  +service and the additional environment variables with the credentials described
  +in the previous step. For example, a MySQL container receives the following
  +environment variables:
   
   * `EXTERNAL_MYSQL_SERVICE_SERVICE_HOST`=[replaceable]#<IP_Address>#
   * `EXTERNAL_MYSQL_SERVICE_SERVICE_PORT`=[replaceable]#<Port_Number>#
  
positive.code:         { "IP": "10.0.0.0" } <3>
        ],
        "ports":  [
          { "port": 80 }
        ]
      }
    ]
  }
  ----
  
  <1> The name of the `Service` instance.
  <2> Traffic to the service will be load-balanced between the supplied
  `Endpoints` if more than one is supplied.
  <3> Endpoints IPs
  https://github.com/kubernetes/kubernetes/blob/master/docs/user-guide/services.md#services-without-selectors[cannot
  be] loopback (127.0.0.0/8), link-local (169.254.0.0/16), or link-local multicast
  (224.0.0.0/24).
  
  ====
  
  === Consuming Credentials in Pods
  
  Now that the service and endpoints are defined, we need to give pods the credentials to use the
  service by setting environment variables in the appropriate containers. In the following
  example, the container receives the following environment variables with credentials for the
  service:
  
  *  `MYSQL_USER`: The username to use with the service.
  *  `MYSQL_PASSWORD`: The passphrase to use with the service.
  *  `MYSQL_DATABASE`: The database name.
  
  ====
  
  
negative.code:             "env": [
                {
                  "name": "MYSQL_USER",
                  "value": "${MYSQL_USER}" <2>
                },
                {
                  "name": "MYSQL_PASSWORD",
                  "value": "${MYSQL_PASSWORD}" <3>
                },
                {
                  "name": "MYSQL_DATABASE",
                  "value": "${MYSQL_DATABASE}" <4>
                }
              ]
            }
  