Send all the aggregations as text with Watcher (ElasticSearch) - elasticsearch

Question

I'm configuring right now Watcher to search in the access logs and see how many error is so far and send it to a slack account.
Well, the problem that I have is because I can't know how many aggregations I will have when the query is done and in my configurations is something like "hardcoded" to send just like 5 at maximum , but if the result is grather than 5 not works.
I'm searching for 404 status code in the query and filter only for one server, then I just need send all bucket results as notification as:
Total: Total-number-of-its
Logs:
log1: number-of-results
log2: number-of-results
log3: number-of-results
log4: number-of-results
log5: number-of-results
log6: number-of-results
Here my configuration:
"trigger" : {
"schedule" : { "interval" : "1h" }
},
"input" : {
"search" : {
"request": {
"body": {
"query": {
"bool": {
"must": [
{ "range": {
"#timestamp": {
"gte": "now-1h",
"lte": "now"
}
}
},
{
"match": {
"beat.hostname": "someserver"
}
}
],
"filter": {
"term": {
"response": "404"
}
}
}
},
"aggs": {
"host": {
"terms": {
"field": "beat.hostname",
"size": 1
}
},
"logs_list": {
"terms": {
"field": "source",
"size": 10
}
}
}
}
}
}
},
"condition": {
"compare" : { "ctx.payload.hits.total" : { "gt" : 0 }}
},
"actions" : {
"notify-slack" : {
"throttle_period" : "30m",
"slack" : {
"message" : {
"from": "Watcher",
"to" : [ "somechannel" ],
"attachments" : [
{
"title" : "400 code status found",
"text" : "Encountered: {{ctx.payload.hits.total}} in the last hour on {{ctx.payload.aggregations.host.buckets.0.key}} \n Files: \n {{ctx.payload.aggregations.logs_list.buckets.0.key}}: {{ctx.payload.aggregations.logs_list.buckets.0.doc_count}} \n {{ctx.payload.aggregations.logs_list.buckets.1.key}}: {{ctx.payload.aggregations.logs_list.buckets.1.doc_count}} \n {{ctx.payload.aggregations.logs_list.buckets.2.key}}: {{ctx.payload.aggregations.logs_list.buckets.2.doc_count}} \n {{ctx.payload.aggregations.logs_list.buckets.3.key}}: {{ctx.payload.aggregations.logs_list.buckets.3.doc_count}} \n {{ctx.payload.aggregations.logs_list.buckets.4.key}}: {{ctx.payload.aggregations.logs_list.buckets.4.doc_count}} \n {{ctx.payload.aggregations.logs_list.buckets.5.key}}: {{ctx.payload.aggregations.logs_list.buckets.5.doc_count}}",
"color" : "danger"
}
]
}
}
}
}
I don't know how should I send the "text" in actions, any ideas how should I pass all buckets result?
Thanks in advance, i'm using xpack, ELK and logstash.

Answer 1

If I understand your question correctly, you want to loop over your aggregation in the action. Try this:
{{#ctx.payload.aggregations.myAggName.buckets}}
{{key}}: {{doc_count}}
{{/ctx.payload.aggregations.myAggName.buckets}}