如何在 minikube kafka 集群上设置 Cruise Control GUI

Question

我已经在 minikube 上使用linkedin Cruise Control 建立了一个 kafka 集群。我正在尝试按照Cruise Control ui git hub page 上的步骤启用巡航控制 GUI，但它不起作用。

当我从 pod 中卷曲地址时，它会从我要输入的页面返回 html 代码，但是当我在我的网络浏览器中尝试时，页面没有连接。我想我需要通过服务公开 pod，但它也不起作用。我还尝试更改 Cruisecontrol.properties 上的属性，但没有。

Pod 正在运行：

cruise-control-cbdd6bf54-prfts       1/1     Running     2          23h
kafka-0                              1/1     Running     1          23h
kafka-1                              1/1     Running     3          23h
kafka-2                              1/1     Running     1          23h
pzoo-0                               1/1     Running     0          23h
pzoo-1                               1/1     Running     0          23h
pzoo-2                               1/1     Running     1          23h
topic-cruise-control-metrics-fjdlw   0/1     Completed   0          23h
zoo-0                                1/1     Running     1          23h
zoo-1                                1/1     Running     1          23h

巡航控制吊舱

Containers:
  cruise-control:
    Container ID:   docker://b6d43bb8db047480374b19671a761013a2fba39a398215276ffb456a1d9a9f2d
    Image:          solsson/kafka-cruise-control@sha256:f48acf73d09e6cf56f15fd0b9057cad36b3cee20963a52d263732bf7e5c1aae1
    Image ID:       docker-pullable://solsson/kafka-cruise-control@sha256:f48acf73d09e6cf56f15fd0b9057cad36b3cee20963a52d263732bf7e5c1aae1
    Port:           8090/TCP
    Host Port:      0/TCP
    State:          Running
      Started:      Tue, 21 Jul 2020 10:32:27 -0300
    Last State:     Terminated
      Reason:       Error
      Exit Code:    1
      Started:      Tue, 21 Jul 2020 10:31:47 -0300
      Finished:     Tue, 21 Jul 2020 10:31:59 -0300
    Ready:          True
    Restart Count:  2
    Requests:
      cpu:        100m
      memory:     512Mi
    Readiness:    tcp-socket :8090 delay=0s timeout=1s period=10s #success=1 #failure=3
    Environment:  <none>
    Mounts:
      /opt/cruise-control/config from config (rw)
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-5kp9f (ro)

cruisecontrol.properties

configurations for the webserver
# ================================

# HTTP listen port
webserver.http.port=8090

# HTTP listen address
webserver.http.address=0.0.0.0

# Whether CORS support is enabled for API or not
webserver.http.cors.enabled=false

# Value for Access-Control-Allow-Origin
webserver.http.cors.origin=http://localhost:8080/

# Value for Access-Control-Request-Method
webserver.http.cors.allowmethods=OPTIONS,GET,POST

# Headers that should be exposed to the Browser (Webapp)
# This is a special header that is used by the
# User Tasks subsystem and should be explicitly
# Enabled when CORS mode is used as part of the
# Admin Interface
webserver.http.cors.exposeheaders=User-Task-ID

# REST API default prefix
# (dont forget the ending *)
webserver.api.urlprefix=/kafkacruisecontrol/*

# Location where the Cruise Control frontend is deployed
webserver.ui.diskpath=./cruise-control-ui/dist/

# URL path prefix for UI
# (dont forget the ending *)
webserver.ui.urlprefix=/*

抄送服务

Name:              cruise-control
Namespace:         mindlabs
Labels:            <none>
Annotations:       Selector:  app=cruise-control
Type:              ClusterIP
IP:                10.98.201.106
Port:              <unset>  8090/TCP
TargetPort:        8090/TCP
Endpoints:         172.18.0.14:8090
Session Affinity:  None
Events:            <none>

感谢您的帮助！

Answer 1

原来我必须将本地 8090 端口转发到集群 8090 端口。 我解决了它：kubectl port-forward svc/cruise-control 8090:8090

Answer 2

默认情况下，Pod 只能通过其在 Kubernetes 集群中的内部 IP 地址访问。

要使容器可以从 Kubernetes 虚拟网络外部访问，您必须将 Pod 公开为 Kubernetes 服务。

在 Minikube 上，LoadBalancer 类型使服务可以通过 minikube service command 访问。需要两个步骤：

kubectl expose deployment _deployment_name_  --type=LoadBalancer --port=8080
minikube service _deployment_name_

对于这种特殊情况，需要将“deployment_name”替换为“cruise-control”

这会打开一个浏览器窗口，为您的应用提供服务并显示应用的响应。