Question

我使用Kubeadm和3个液滴在Digitalocean上创建了一个集群。由于这不是Digital ocean的托管Kubernetes集群，如何手动设置LoadBalancer？

我尝试通过将以下行添加到部署配置文件中来添加外部负载均衡器

kubectl get svc

NAME                              TYPE           CLUSTER-IP      EXTERNAL-IP   PORT(S)        AGE
kubernetes                        ClusterIP      10.96.0.1       <none>        443/TCP        13d
mongo-mongodb-replicaset          ClusterIP      None            <none>        27017/TCP      3h15m
mongo-mongodb-replicaset-client   ClusterIP      None            <none>        27017/TCP      3h15m
nodejs-nodeapp                    LoadBalancer   10.109.213.98   <pending>     80:31769/TCP   61m

kubectl describe svc nodejs-nodeapp

Name:                     nodejs-nodeapp
Namespace:                default
Labels:                   app.kubernetes.io/instance=nodejs
                          app.kubernetes.io/managed-by=Tiller
                          app.kubernetes.io/name=nodeapp
                          app.kubernetes.io/version=1.0
                          helm.sh/chart=nodeapp-0.1.0
Annotations:              <none>
Selector:                 app.kubernetes.io/instance=nodejs,app.kubernetes.io/name=nodeapp
Type:                     LoadBalancer
IP:                       10.109.213.98
Port:                     http  80/TCP
TargetPort:               http/TCP
NodePort:                 http  31769/TCP
Endpoints:                10.244.2.19:8080
Session Affinity:         None
External Traffic Policy:  Cluster
Events:                   <none>

kubectl get pods

NAME                              READY   STATUS    RESTARTS   AGE
mongo-mongodb-replicaset-0        1/1     Running   0          3h18m
mongo-mongodb-replicaset-1        1/1     Running   0          3h17m
mongo-mongodb-replicaset-2        1/1     Running   0          3h16m
nodejs-nodeapp-7b89db8888-sjcbq   1/1     Running   0          65m

kubectl describe pod nodejs-nodeapp

Name:               nodejs-nodeapp-7b89db8888-sjcbq
Namespace:          default
Priority:           0
PriorityClassName:  <none>
Node:               worker-02/206.81.3.65
Start Time:         Sun, 14 Jun 2020 11:21:07 +0100
Labels:             app.kubernetes.io/instance=nodejs
                    app.kubernetes.io/name=nodeapp
                    pod-template-hash=7b89db8888
Annotations:        <none>
Status:             Running
IP:                 10.244.2.19
Controlled By:      ReplicaSet/nodejs-nodeapp-7b89db8888
Containers:
  nodeapp:
    Container ID:   docker://f0d4d01f....
    Image:          turfff/node-replicas:latest
    Image ID:       docker-pullable://turfff/node-replicas@sha256:34d...
    Port:           8080/TCP
    Host Port:      0/TCP
    State:          Running
      Started:      Sun, 14 Jun 2020 11:21:08 +0100
    Ready:          True
    Restart Count:  0
    Liveness:       http-get http://:http/sharks delay=0s timeout=1s period=10s #success=1 #failure=3
    Readiness:      http-get http://:http/sharks delay=0s timeout=1s period=10s #success=1 #failure=3
    Environment:
      MONGO_USERNAME:    <set to the key 'MONGO_USERNAME' in secret 'nodejs-auth'>          Optional: false
      MONGO_PASSWORD:    <set to the key 'MONGO_PASSWORD' in secret 'nodejs-auth'>          Optional: false
      MONGO_HOSTNAME:    <set to the key 'MONGO_HOSTNAME' of config map 'nodejs-config'>    Optional: false
      MONGO_PORT:        <set to the key 'MONGO_PORT' of config map 'nodejs-config'>        Optional: false
      MONGO_DB:          <set to the key 'MONGO_DB' of config map 'nodejs-config'>          Optional: false
      MONGO_REPLICASET:  <set to the key 'MONGO_REPLICASET' of config map 'nodejs-config'>  Optional: false
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from nodejs-nodeapp-token-4wxvd (ro)
Conditions:
  Type              Status
  Initialized       True
  Ready             True
  ContainersReady   True
  PodScheduled      True
Volumes:
  nodejs-nodeapp-token-4wxvd:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  nodejs-nodeapp-token-4wxvd
    Optional:    false
QoS Class:       BestEffort
Node-Selectors:  <none>
Tolerations:     node.kubernetes.io/not-ready:NoExecute for 300s
                 node.kubernetes.io/unreachable:NoExecute for 300s
Events:          <none>

但是，当我运行配置并检查创建的svc

{{1}}

它无法创建负载均衡器。如何手动设置LoadBalancer？

Answer 1

我不建议手动配置负载均衡器。如果安装digital ocean cloud controller manager（这是DigitalOcean的Kubernetes云控制器管理器实现），则可以使其自动化。了解有关云控制器管理器here的更多信息。

DigitalOcean云控制器管理器运行服务控制器，该服务控制器负责监视LoadBalancer类型的服务并创建DO负载均衡器以满足其需求。 Here是如何使用它的示例。

Here是一个Yaml文件，可用于将其部署到Kubernetes集群上。这需要将数字海洋api令牌放置在清单的access-token:部分中。

如何在Digitalocean上向集群添加负载均衡器

1 个答案: