nodes are available: 1 node(s) had taint {node-role.kubernetes.io/master: }, that the pod didn't tolerate, 2 node(s) didn't match pod affinity/anti-affinity

 

 

 

root@ubuntu:~# cat web-anti-affinity.yaml
apiVersion: apps/v1
kind: Deployment
metadata:
  name: web-nginx
spec:
  selector:
    matchLabels:
      app: web-nginx
  replicas: 3
  template:
    metadata:
      labels:
        app: web-nginx
    spec:
      affinity:
              #pod 反亲和性, 打散 web-nginx 各个副本
        podAntiAffinity:
          requiredDuringSchedulingIgnoredDuringExecution:
          - labelSelector:
              matchExpressions:
              - key: app
                operator: In
                values:
                - web-nginx
            topologyKey: "kubernetes.io/hostname"
      containers:
      - image: nginx
        imagePullPolicy: IfNotPresent
        name: web2-worker
        ports:
        - containerPort: 8087
          protocol: TCP

 

 

 

root@ubuntu:~#  kubectl get pod --all-namespaces 
NAMESPACE     NAME                                       READY   STATUS    RESTARTS   AGE
default       web-nginx-7bdc6b976b-glwvh                 1/1     Running   0          8m52s
default       web-nginx-7bdc6b976b-pqk86                 0/1     Pending   0          8m52s
default       web-nginx-7bdc6b976b-xzsf2                 1/1     Running   0          8m52s
kube-system   calico-kube-controllers-5978c5f6b5-tk6pg   1/1     Running   0          2d20h
kube-system   calico-node-6fwpp                          1/1     Running   0          2d20h
kube-system   calico-node-hdkcz                          0/1     Running   0          2d20h
kube-system   calico-node-xldz2                          1/1     Running   0          2d20h
kube-system   coredns-66bff467f8-hlbzk                   1/1     Running   0          50m
kube-system   coredns-66bff467f8-zx85v                   1/1     Running   0          49m
kube-system   etcd-ubuntu                                1/1     Running   4          2d20h
kube-system   kube-apiserver-ubuntu                      1/1     Running   7          2d20h
kube-system   kube-controller-manager-ubuntu             1/1     Running   5          2d20h
kube-system   kube-proxy-798sq                           1/1     Running   0          2d20h
kube-system   kube-proxy-8hh62                           1/1     Running   0          2d20h
kube-system   kube-proxy-l268b                           1/1     Running   0          2d20h
kube-system   kube-scheduler-ubuntu                      1/1     Running   7          2d20h
root@ubuntu:~#  kubectl -n  default     describe pod  web-nginx-7bdc6b976b-pqk86 
Name:           web-nginx-7bdc6b976b-pqk86
Namespace:      default
Priority:       0
Node:           <none>
Labels:         app=web-nginx
                pod-template-hash=7bdc6b976b
Annotations:    <none>
Status:         Pending
IP:             
IPs:            <none>
Controlled By:  ReplicaSet/web-nginx-7bdc6b976b
Containers:
  web2-worker:
    Image:        nginx
    Port:         8087/TCP
    Host Port:    0/TCP
    Environment:  <none>
    Mounts:
      /var/run/secrets/kubernetes.io/serviceaccount from default-token-smzqh (ro)
Conditions:
  Type           Status
  PodScheduled   False 
Volumes:
  default-token-smzqh:
    Type:        Secret (a volume populated by a Secret)
    SecretName:  default-token-smzqh
    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:
  Type     Reason            Age                  From               Message
  ----     ------            ----                 ----               -------
  Warning  FailedScheduling  41s (x9 over 9m21s)  default-scheduler  0/3 nodes are available: 1 node(s) had taint {node-role.kubernetes.io/master: }, that the pod didn't tolerate, 2 node(s) didn't match pod affinity/anti-affinity, 2 node(s) didn't satisfy existing pods anti-affinity rules.

 

允许master节点部署pod，使用命令如下:

root@ubuntu:~# kubectl get nodes --show-labels
NAME     STATUS   ROLES    AGE     VERSION   LABELS
bogon    Ready    worker   2d20h   v1.18.1   beta.kubernetes.io/arch=arm64,beta.kubernetes.io/os=linux,kubernetes.io/arch=arm64,kubernetes.io/hostname=bogon,kubernetes.io/os=linux,node-role.kubernetes.io/worker=worker
cloud    Ready    worker   2d20h   v1.21.1   beta.kubernetes.io/arch=arm64,beta.kubernetes.io/os=linux,kubernetes.io/arch=arm64,kubernetes.io/hostname=cloud,kubernetes.io/os=linux,node-role.kubernetes.io/worker=worker
ubuntu   Ready    master   2d20h   v1.18.1   beta.kubernetes.io/arch=arm64,beta.kubernetes.io/os=linux,kubernetes.io/arch=arm64,kubernetes.io/hostname=ubuntu,kubernetes.io/os=linux,node-role.kubernetes.io/master=
root@ubuntu:~# kubectl taint nodes --all node-role.kubernetes.io/master-
node/ubuntu untainted
taint "node-role.kubernetes.io/master" not found
taint "node-role.kubernetes.io/master" not found

 

成功了

root@ubuntu:~#  kubectl get pod --all-namespaces 
NAMESPACE     NAME                                       READY   STATUS    RESTARTS   AGE
default       web-nginx-7bdc6b976b-glwvh                 1/1     Running   0          17m
default       web-nginx-7bdc6b976b-pqk86                 1/1     Running   0          17m
default       web-nginx-7bdc6b976b-xzsf2                 1/1     Running   0          17m

 

 

禁止master部署pod

kubectl taint nodes k8s node-role.kubernetes.io/master=true:NoSchedule