When I use ElasticSearchStore to fetch activation logs, system will report such
error, I think it is raised from elasticsearch's `_search` API
Then I checked the code, and found below in
`whisk/core/containerpool/logging/ElasticSearchRestClient.scala`:
```scala
def search[T: RootJsonReader](index: String,
payload: EsQuery = EsQuery(EsQueryAll()),
headers: List[HttpHeader] = List.empty):
Future[Either[StatusCode, T]] =
requestJson[T](mkJsonRequest(POST, Uri(index), payload.toJson.asJsObject,
baseHeaders ++ headers))
```
what confused me is that the uri for search in ES should be like
`${index_name}/_search` while uri in above codes is not
I'm not sure whether this is a bug or meant to be like this(then I missed
something)
## Environment details:
* lambda version: latest master branch
* elasticsearch version: 6.3.2
## Steps to reproduce the issue:
1. start a elasticsearch container
```
docker run -td --name es -p 9200:9200
docker.elastic.co/elasticsearch/elasticsearch:6.3.2
```
2. edit config for logstash and start it
```
input {
file {
path => "/tmp/wsklogs/invoker0/userlogs-*.log"
codec => "json"
}
}
output {
elasticsearch{
hosts => ["http://x.x.x.x:9200";]
index => "whisk_user_logs"
}
}
```
3. deploy the openwhisk on a single node, with below options added to
`ansible/group_vars/all`
```
userLogs_spi: whisk.core.containerpool.logging.ElasticSearchLogStoreProvider
invoker_extraEnv:
- CONFIG_whisk_logstore_elasticsearch_protocol: http
- CONFIG_whisk_logstore_elasticsearch_host: x.x.x.x
- CONFIG_whisk_logstore_elasticsearch_port: 9200
- CONFIG_whisk_logstore_elasticsearch_path: /whisk_user_logs
- CONFIG_whisk_logstore_elasticsearch_logSchema_userLogs: logs
- CONFIG_whisk_logstore_elasticsearch_logSchema_message: namespaceId
- CONFIG_whisk_logstore_elasticsearch_logSchema_activationId: activationId
- CONFIG_whisk_logstore_elasticsearch_logSchema_stream: stream
- CONFIG_whisk_logstore_elasticsearch_logSchema_time: time
controller_extraEnv:
- CONFIG_whisk_logstore_elasticsearch_protocol: http
- CONFIG_whisk_logstore_elasticsearch_host: x.x.x.x
- CONFIG_whisk_logstore_elasticsearch_port: 9200
- CONFIG_whisk_logstore_elasticsearch_path: /whisk_user_logs
- CONFIG_whisk_logstore_elasticsearch_logSchema_userLogs: logs
- CONFIG_whisk_logstore_elasticsearch_logSchema_message: namespaceId
- CONFIG_whisk_logstore_elasticsearch_logSchema_activationId: activationId
- CONFIG_whisk_logstore_elasticsearch_logSchema_stream: stream
- CONFIG_whisk_logstore_elasticsearch_logSchema_time: time
```
4. invoke an action and get its activation's log:
```
curl -k
https://789c46b1-71f6-4ed5-8c54-816aa4f8c502:abczO3xZCLrMN6v2BKK1dXYFpXlPkccOFqm12CdAsMgRU4VrNZ9lyGVCGuMDGIwP@localhost/api/v1/namespaces/_/activations/38598e4c588f43f6998e4c588f53f666/logs
```
## Provide the expected results and outputs:
```
# curl -k
https://789c46b1-71f6-4ed5-8c54-816aa4f8c502:abczO3xZCLrMN6v2BKK1dXYFpXlPkccOFqm12CdAsMgRU4VrNZ9lyGVCGuMDGIwP@localhost/api/v1/namespaces/_/activations/38598e4c588f43f6998e4c588f53f666/logs
{"logs":[]}
```
## Provide the actual results and outputs:
```
# curl -k
https://789c46b1-71f6-4ed5-8c54-816aa4f8c502:abczO3xZCLrMN6v2BKK1dXYFpXlPkccOFqm12CdAsMgRU4VrNZ9lyGVCGuMDGIwP@localhost/api/v1/namespaces/_/activations/38598e4c588f43f6998e4c588f53f666/logs
{"error":"Status code '405 Method Not Allowed' was returned from log
store","code":"5c81a8b7b2fc5b840a61f6e175e1d30a"}
```
[ Full content available at:
https://github.com/apache/incubator-openwhisk/issues/4022 ]
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