agent: connection refused to localhost:8080/api

[jeusdi]

Here my configuration file:

apiVersion: k3d.io/v1alpha5
kind: Simple
metadata:
  name: localstack
servers: 1
agents: 2
ports:
  - port: 8000:32080
    nodeFilters:
      - server:0:direct
  - port: 8443:32443
    nodeFilters:
      - server:0:direct
  - port: 9000:32090
    nodeFilters:
      - server:0:direct
  - port: 20017:30017
    nodeFilters:
      - server:0:direct
  - port: 20018:30018
    nodeFilters:
      - server:0:direct
  - port: 9094:32094
    nodeFilters:
      - server:0:direct
env:
  - envVar: HTTP_PROXY=http://10.49.1.1:8080
    nodeFilters:
      - server:0
      - agent:*
  - envVar: HTTPS_PROXY=http://10.49.1.1:8080
    nodeFilters:
      - server:0
      - agent:*
  - envVar: http_proxy=http://10.49.1.1:8080
    nodeFilters:
      - server:0
      - agent:*
  - envVar: https_proxy=http://10.49.1.1:8080
    nodeFilters:
      - server:0
      - agent:*
  - envVar: NO_PROXY=localhost,127.0.0.1
    nodeFilters:
      - server:0
      - agent:*
registries:
  create:
    name: registry.localhost
    host: "0.0.0.0"
    hostPort: "5000"
options:
  k3d:
    wait: true
    timeout: "60s"
    disableLoadbalancer: true
    disableImageVolume: false
    disableRollback: true
  k3s:
    extraArgs:
      - arg: '--disable=traefik,servicelb'
        nodeFilters:
          - server:*
  kubeconfig:
    updateDefaultKubeconfig: true
    switchCurrentContext: true

My cluster is running in host is behind a corporate proxy.

I've added those HTTP_PROXY... environment variables inside nodes:

$ docker container exec k3d-localstack-agent-1 sh -c 'env | grep -i  _PROXY'
HTTPS_PROXY=http://10.49.1.1:8080
NO_PROXY=localhost,127.0.0.1
https_proxy=http://<ip>:8080
http_proxy=http://<ip>:8080
HTTP_PROXY=http://<ip>:8080

Inside my agent I'm getting:

The connection to the server localhost:8080 was refused - did you specify the right host or port?
E0117 16:25:35.285399    2068 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp 127.0.0.1:8080: connect: connection refused
E0117 16:25:35.286357    2068 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp 127.0.0.1:8080: connect: connection refused
E0117 16:25:35.288998    2068 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp 127.0.0.1:8080: connect: connection refused
E0117 16:25:35.291197    2068 memcache.go:265] couldn't get current server API group list: Get "http://localhost:8080/api?timeout=32s": dial tcp 127.0.0.1:8080: connect: connection refused

Any ideas?