How to perform the arthimatic operation on data from elasticsearch - elasticsearch

Question

I need to have average of cpuload on specific nodetype. For example if I give nodetype as tpt it should give the average of cpuload of nodetype's of all tpt available. I tried different methods but vain...
My data in elasticsearch is below:
{
"took" : 5,
"timed_out" : false,
"_shards" : {
"total" : 5,
"successful" : 5,
"failed" : 0
},
"hits" : {
"total" : 4,
"max_score" : 1.0,
"hits" : [
{
"_index" : "kpi",
"_type" : "kpi",
"_id" : "\u0003",
"_score" : 1.0,
"_source" : {
"kpi" : {
"CpuAverageLoad" : 13,
"NodeId" : "kishan",
"NodeType" : "Tpt",
"State" : "online",
"Static_limit" : 0
}
}
},
{
"_index" : "kpi",
"_type" : "kpi",
"_id" : "\u0005",
"_score" : 1.0,
"_source" : {
"kpi" : {
"CpuAverageLoad" : 15,
"NodeId" : "kishan1",
"NodeType" : "tpt",
"State" : "online",
"Static_limit" : 0
}
}
},
{
"_index" : "kpi",
"_type" : "kpi",
"_id" : "\u0004",
"_score" : 1.0,
"_source" : {
"kpi" : {
"MaxLbCapacity" : "700000",
"NodeId" : "kishan2",
"NodeType" : "bang",
"OnlineCSCF" : [
"001",
"002"
],
"State" : "Online",
"TdbGroup" : 1,
"TdGroup" : 0
}
}
},
{
"_index" : "kpi",
"_type" : "kpi",
"_id" : "\u0002",
"_score" : 1.0,
"_source" : {
"kpi" : {
"MaxLbCapacity" : "700000",
"NodeId" : "kishan3",
"NodeType" : "bang",
"OnlineCSCF" : [
"001",
"002"
],
"State" : "Online",
"TdLGroup" : 1,
"TGroup" : 0
}
}
}
]
}
}
And my query is
curl -XGET 'localhost:9200/_search?pretty' -H 'Content-Type: application/json' -d'
{
"query": {
"bool" : {
"must" : {
"script" : {
"script" : {
"source" : "kpi[CpuAverageLoad].value > params.param1",
"lang" : "painless",
"params" : {
"param1" : 5
}
}
}
}
}
}
}'
but is falling as it is unable to find the exact source.
{
"error" : {
"root_cause" : [
{
"type" : "illegal_argument_exception",
"reason" : "[script] unknown field [source], parser not found"
}
],
"type" : "illegal_argument_exception",
"reason" : "[script] unknown field [source], parser not found"
},
"status" : 400
}