spec.es.type not working in Output.logging.kubesphere.io/v1alpha2

[LQBing]

Describe the Bug

I just wanna output log into my external ES with _type as doc not the default value _doc.

Refer to the es output plugin document , I create an Output.logging.kubesphere.io/v1alpha2 custom resource with spec.es.type value as "doc".

But, after the Output.logging.kubesphere.io/v1alpha2 custom resource apply, the flunent-bit pod print warn log [ warn] net_tcp_fd_connect: getaddrinfo(host='doc'): Name or service not known and output log not appear in my extrnal ES.

Versions Used
KubeSphere: v3.1.0
Kubernetes:

Environment
How many nodes and their hardware configuration:

For example: CentOS 7.5 / 3 masters: 8cpu/8g; 3 nodes: 8cpu/16g
(and other info are welcomed to help us debugging)

How To Reproduce
Steps to reproduce the behavior:

1. Install kubesphere
2. Install logging feature and config with extrnal ES
3. Create an Output.logging.kubesphere.io/v1alpha2 custom resource with blow yaml file:

apiVersion: logging.kubesphere.io/v1alpha2
kind: Output
metadata:
  labels:
    logging.kubesphere.io/component: nginx
    logging.kubesphere.io/enabled: 'true'
  name: es-nginx
  namespace: kubesphere-logging-system
spec:
  es:
    type: "doc"
    host: "xxx.xxx.xxx.xxx"
    logstashFormat: true
    logstashPrefix: ks-mycluster-nginx
    port: 9200
    timeKey: '@timestamp'
  match: nginx

4. Check the fluent-bit log, my fluent-bit log like blow:

2021-10-26T14:27:38.732020409+08:00 [2021/10/26 06:27:38] [ warn] net_tcp_fd_connect: getaddrinfo(host='doc'): Name or service not known

2021-10-26T14:27:38.732589157+08:00 [2021/10/26 06:27:38] [error] [src/flb_http_client.c:1120 errno=32] Broken pipe

2021-10-26T14:27:38.732599446+08:00 [2021/10/26 06:27:38] [ warn] [output:es:es.2] http_do=-1 URI=/_bulk

2021-10-26T14:27:38.732935277+08:00 [2021/10/26 06:27:38] [ warn] [engine] failed to flush chunk '39-1635229658.209486665.flb', retry in 6 seconds: task_id=5, input=tail.3 > output=es.2

2021-10-26T14:27:44.779557818+08:00 [2021/10/26 06:27:44] [ warn] net_tcp_fd_connect: getaddrinfo(host='doc'): Name or service not known

2021-10-26T14:27:44.779989661+08:00 [2021/10/26 06:27:44] [error] [src/flb_http_client.c:1120 errno=32] Broken pipe

2021-10-26T14:27:44.780009144+08:00 [2021/10/26 06:27:44] [ warn] [output:es:es.2] http_do=-1 URI=/_bulk

2021-10-26T14:27:44.780253761+08:00 [2021/10/26 06:27:44] [ warn] [engine] chunk '39-1635229658.209486665.flb' cannot be retried: task_id=5, input=tail.3 > output=es.2

2021-10-26T14:28:47.376303969+08:00 level=info msg="Killed Fluent Bit"

2021-10-26T14:28:47.376341498+08:00 level=info msg="Config file changed, stop Fluent Bit"

Expected behavior

I just wanna output log into my external ES with _type as doc not the default value _doc.

[dkeven]

It's a simple mistake in the fluentbit-operator, I've created a PR fluent/fluent-operator#160 to fix this