请教一下,启动一个nginx服务测试,节点IP是docker ip,而不是flannel定义的网段ip,怎么解决?
$ kubectl run test-nginx --image=nginx:alpine
$ kubectl expose deployment test-nginx --port=80 --type=NodePort
分配的pod IP 为啥不是flannel的网段10.244.2.x
master执行:
slave2执行:
巧妹:
slave2节点的route
巧妹:
chatgpt:不喜勿喷
该问题可能是由于kube-flannel组件无法获取到pod的网络信息而导致的。可能的解决方法如下:
1.检查kube-flannel的配置是否正确,特别是podSubnet的值是否正确。可以尝试在kube-flannel的ConfigMap中手动添加subnet-file配置,将podSubnet值写入文件并保存,然后在kube-flannel配置文件中添加该文件路径。例如:
apiVersion: v1
kind: ConfigMap
metadata:
name: kube-flannel-cfg
namespace: kube-system
data:
subnet.env: |
FLANNEL_NETWORK=10.244.0.0/16
FLANNEL_SUBNET=10.244.0.1/24
FLANNEL_MTU=1450
---
apiVersion: apps/v1
kind: DaemonSet
metadata:
name: kube-flannel-ds-amd64
namespace: kube-system
spec:
selector:
matchLabels:
app: kube-flannel
template:
metadata:
labels:
app: kube-flannel
spec:
containers:
- name: kube-flannel
image: quay.io/coreos/flannel:v0.14.0
env:
- name: POD_SUBNET
valueFrom:
configMapKeyRef:
name: kube-flannel-cfg
key: subnet.env
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
- --iface=$(POD_IFACE_NAME)
volumeMounts:
- name: run
mountPath: /run
- name: flannel-cfg
mountPath: /etc/kube-flannel/
volumes:
- name: run
hostPath:
path: /run
- name: flannel-cfg
configMap:
name: kube-flannel-cfg
检查kube-flannel是否正确配置了网络插件,例如ip-masq和kube-subnet-mgr。可以查看kube-flannel的配置文件,以确认这些插件是否已正确配置。例如:
command:
- /opt/bin/flanneld
args:
- --ip-masq
- --kube-subnet-mgr
- --iface=$(POD_IFACE_NAME)
检查节点是否正常工作。可能是由于节点出现问题,例如节点资源不足或磁盘空间不足等,导致kube-flannel无法正常工作。可以查看节点的日志和状态,以确认是否存在这些问题。例如:
kubectl describe node <node-name>
kubectl logs kube-flannel-ds-<node-name>