Mac环境下Kind单节点集群安装Nginx Ingress调度失败求助

在Mac系统中使用Kind创建名为devops的单节点Kubernetes集群，按照官方指引安装Nginx Ingress，执行以下命令：

kind create cluster --name devops

kubectl apply --filename https://raw.githubusercontent.com/kubernetes/ingress-nginx/master/deploy/static/provider/kind/deploy.yaml

kubectl wait --namespace ingress-nginx --for=condition=ready pod --selector=app.kubernetes.io/component=controller --timeout=180s

执行后出现超时，检查节点无污点：

kubectl get node
NAME                   STATUS   ROLES           AGE   VERSION
devops-control-plane   Ready    control-plane   16m   v1.25.2

kubectl describe node devops-control-plane | grep Taint
Taints:             <none>

查看Pod事件发现调度失败，原因是节点不匹配Pod的节点选择器：

kubectl -n ingress-nginx describe pod ingress-nginx-controller-7d68cdddd8-tkzzz
...
Node-Selectors:              ingress-ready=true
                             kubernetes.io/os=linux
Tolerations:                 node-role.kubernetes.io/control-plane:NoSchedule
                             node-role.kubernetes.io/master:NoSchedule
                             node.kubernetes.io/not-ready:NoExecute op=Exists for 300s
                             node.kubernetes.io/unreachable:NoExecute op=Exists for 300s
Events:
  Type     Reason            Age   From               Message
  ----     ------            ----  ----               -------
  Warning  FailedScheduling  104s  default-scheduler  0/1 nodes are available: 1 node(s) didn't match Pod's node affinity/selector. preemption: 0/1 nodes are available: 1 Preemption is not helpful for scheduling.

问题核心是Ingress Controller Pod的节点选择器要求节点带有ingress-ready=true标签，但你的Kind集群节点默认没有配置该标签，导致Pod无法完成调度。

执行以下命令给集群节点添加缺失的标签：

kubectl label node devops-control-plane ingress-ready=true

标签添加完成后，Pod会自动触发调度流程，你可以再次执行wait命令验证Pod就绪状态：

kubectl wait --namespace ingress-nginx --for=condition=ready pod --selector=app.kubernetes.io/component=controller --timeout=180s

内容的提问来源于stack exchange，提问作者sqr