[training#2] add ipmi powerStatus poller and status alert job

[iceiilin]

Background

Training#2-1: add ipmi powerStatus poller.

Implementation:

add powerStatus poller callback in ipmi-job and corresponding item in message-cache

Result:

After posting powerStatus poller using the following command:

 curl -X POST -H 'Content-Type: application/json' -d '{"type":"ipmi","pollInterval":10000,"node":"59ad08886cea19993a4c7a77", "config":{"command":"powerStatus"}}' localhost:8080/api/2.0/pollers

The powerStatus poller data is shown as below:

curl localhost:8080/api/2.0/pollers/59ad13a5a8455cbf3eafd5f9/data/current | python -mjson.tool
[
    {
        "host": "172.31.128.21",
        "node": "59ad08886cea19993a4c7a77",
        "powerStatus": {
            "status": "OFF"
        },
        "timestamp": "Mon Sep 04 2017 09:01:21 GMT+0000 (UTC)",
        "user": "admin"
    }
]

After powering on the node, and wait for 10s,

ipmitool -I lanplus -U admin -P admin -H 172.31.128.21 chassis power on

The poller data is

[
    {
        "host": "172.31.128.21",
        "node": "59ad08886cea19993a4c7a77",
        "powerStatus": {
            "status": "ON"
        },
        "timestamp": "Mon Sep 04 2017 09:17:29 GMT+0000 (UTC)",
        "user": "admin"
    }
]