环境：
- 1 名师傅，3 名工人
- 操作系统：Ubuntu 18.04，由 Vagrant 配置 3 个网络接口（NAT、hostonly、bridge）
- Kubernetes：1.21
- Docker：20.10.5
- Pod 网络：Weave Net
问题： NodePort 服务未将负载平衡到其他节点上的 pod。例如：
- Worker1：pod1，pod2
- Worker2：pod3、pod4
- Worker3：没有 Pod
当我发出 curl 命令时：
- http://worker1:30001：我只能在 pod1、pod2 上访问服务
- http://worker2:30001：我只能在 pod3、pod4 上访问服务
- http://worker3:30001: curl: (7) 无法连接到本地主机端口 30001：没有到主机的路由
附加信息：
k get nodes -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
vm-150 Ready control-plane,master 35m v1.21.0 10.0.2.15 <none> Ubuntu 18.04.5 LTS 4.15.0-128-generic docker://20.10.5
vm-163 Ready <none> 31m v1.21.0 10.0.2.15 <none> Ubuntu 18.04.5 LTS 4.15.0-128-generic docker://20.10.5
vm-216 Ready <none> 31m v1.21.0 10.0.2.15 <none> Ubuntu 18.04.5 LTS 4.15.0-128-generic docker://20.10.5
vm-217 Ready <none> 28m v1.21.0 10.0.2.15 <none> Ubuntu 18.04.5 LTS 4.15.0-128-generic docker://20.10.5
k get pods --all-namespaces -o wide
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
default hello-deploy-6575485494-4sstw 1/1 Running 0 33m 10.32.0.4 vm-216 <none> <none>
default hello-deploy-6575485494-69jdv 1/1 Running 0 33m 10.32.0.7 vm-163 <none> <none>
default hello-deploy-6575485494-9cshc 1/1 Running 0 33m 10.32.0.6 vm-216 <none> <none>
default hello-deploy-6575485494-bhsqr 1/1 Running 0 33m 10.32.0.6 vm-163 <none> <none>
default hello-deploy-6575485494-dwlfv 1/1 Running 0 33m 10.32.0.5 vm-216 <none> <none>
default hello-deploy-6575485494-kfwm7 1/1 Running 0 33m 10.32.0.3 vm-163 <none> <none>
default hello-deploy-6575485494-mxtrq 1/1 Running 0 33m 10.32.0.4 vm-163 <none> <none>
default hello-deploy-6575485494-qr458 1/1 Running 0 33m 10.32.0.5 vm-163 <none> <none>
default hello-deploy-6575485494-rg594 1/1 Running 0 33m 10.32.0.7 vm-216 <none> <none>
default hello-deploy-6575485494-vt6d8 1/1 Running 0 33m 10.32.0.3 vm-216 <none> <none>
kube-system coredns-558bd4d5db-bbxl7 1/1 Running 0 37m 10.32.0.2 vm-150 <none> <none>
kube-system coredns-558bd4d5db-kphk5 1/1 Running 0 37m 10.32.0.3 vm-150 <none> <none>
kube-system etcd-vm-150 1/1 Running 0 37m 10.0.2.15 vm-150 <none> <none>
kube-system kube-apiserver-vm-150 1/1 Running 0 37m 10.0.2.15 vm-150 <none> <none>
kube-system kube-controller-manager-vm-150 1/1 Running 0 37m 10.0.2.15 vm-150 <none> <none>
kube-system kube-proxy-2j2f8 1/1 Running 0 31m 10.0.2.15 vm-217 <none> <none>
kube-system kube-proxy-pbvvd 1/1 Running 0 34m 10.0.2.15 vm-163 <none> <none>
kube-system kube-proxy-pwx7p 1/1 Running 0 34m 10.0.2.15 vm-216 <none> <none>
kube-system kube-proxy-x9d8z 1/1 Running 0 37m 10.0.2.15 vm-150 <none> <none>
kube-system kube-scheduler-vm-150 1/1 Running 0 37m 10.0.2.15 vm-150 <none> <none>
kube-system weave-net-jnkjp 2/2 Running 1 31m 10.0.2.15 vm-217 <none> <none>
kube-system weave-net-l8fmm 2/2 Running 0 34m 10.0.2.15 vm-163 <none> <none>
kube-system weave-net-lgzqp 2/2 Running 0 37m 10.0.2.15 vm-150 <none> <none>
kube-system weave-net-mwvzj 2/2 Running 0 34m 10.0.2.15 vm-216 <none> <none>
部署清单：
apiVersion: apps/v1
kind: Deployment
metadata:
name: hello-deploy
spec:
replicas: 10
selector:
matchLabels:
app: hello-world
minReadySeconds: 10
strategy:
type: RollingUpdate
rollingUpdate:
maxUnavailable: 1
maxSurge: 1
template:
metadata:
labels:
app: hello-world
spec:
containers:
- name: hello-pod
image: ngocchien/chien_test:1.0.0
ports:
- containerPort: 8080
---
apiVersion: v1
kind: Service
metadata:
name: hello-svc
labels:
app: hello-world
spec:
type: NodePort
ports:
- port: 8080
targetPort: 8080
nodePort: 30001
protocol: TCP
selector:
app: hello-world