问题：coredns configmap 添加hosts不起作用
coredns: 10.233.0.3
nodelocaldns: 169.254.25.10
kubectl edit configmap coredns -n kube-system
apiVersion: v1
data:
Corefile: |
.:53 {
errors
health {
lameduck 5s
}
log
ready
kubernetes cluster.local in-addr.arpa ip6.arpa {
pods insecure
fallthrough in-addr.arpa ip6.arpa
}
## 添加部分
hosts {
192.168.10.220 rancher.sundayhk.com
192.168.10.220 ha.sundayhk.com
fallthrough
}
prometheus :9153
在busybox容器中测试
nslookup ha.sundayhk.com 169.254.25.10 # 不通
nslookup ha.sundayhk.com 10.233.0.3 # 通
参考：https://github.com/coredns/coredns/issues/3298
将 nodelocaldns 的 forward 参数
kubectl edit configmap nodelocaldns -n kube-system
# 修改前
.:53 {
errors
cache 30
reload
loop
bind 169.254.25.10
forward . /etc/resolv.conf
prometheus :9253
}
# 修改成
.:53 {
errors
cache 30
reload
loop
bind 169.254.25.10
forward . 10.233.0.3 {
force_tcp
}
prometheus :9253
}
删除nodelocaldns pod刷新配置
kubectl delete pod -n kube-system $(kubectl get pod -n kube-system | grep nodelocaldns| awk '{print $1}')
https://blog.csdn.net/zhouzixin053/article/details/105416203