我正在尝试建立一个裸机Kubernetes集群。我已经设置了基本群集,没问题,但是我似乎无法让MetalLB正常工作以向服务公开外部IP。
我的最终目标是能够部署具有2个以上副本的应用程序,并具有一个IP /端口供我参考,以便访问任何正在运行的实例。
到目前为止,我所做的(为了对此进行测试)是:
kubectl apply -f https://raw.githubusercontent.com/google/metallb/v0.7.3/manifests/metallb.yaml
kubectl apply -f metallb-layer-2.yml
kubectl run nginx --image=nginx --port=80
kubectl expose deployment nginx --type=LoadBalancer --name=nginx-service
metallb-layer-2.yml:
apiVersion: v1
kind: ConfigMap
metadata:
namespace: metallb-system
name: config
data:
config: |
address-pools:
- name: k8s-master-ip-space
protocol: layer2
addresses:
- 192.168.0.240-192.168.0.250
然后运行kubectl get svc
时,我得到:
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
nginx-service LoadBalancer 10.101.122.140 <pending> 80:30930/TCP 9m29s
无论我做什么,都无法获得具有外部IP的服务。有人有主意吗?
编辑:找到了有关使用NodePort的另一篇文章之后,我做了以下事情:
iptables -A FORWARD -j ACCEPT
找到了here。
现在,不幸的是,当我尝试卷曲nginx端点时,我得到了:
> kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
nginx-service LoadBalancer 10.101.122.140 192.168.0.240 80:30930/TCP 13h
> curl 192.168.0.240:30930
curl: (7) Failed to connect to 192.168.0.240 port 30930: No route to host
> curl 192.168.0.240:80
curl: (7) Failed to connect to 192.168.0.240 port 80: No route to host
我不确定这到底意味着什么。
编辑2: 当我在运行Pod的工作程序上执行TCP Dump时,我得到:
15:51:44.705699 IP 192.168.0.223.54602 > 192.168.0.240.http: Flags [S], seq 1839813500, win 29200, options [mss 1460,sackOK,TS val 375711117 ecr 0,nop,wscale 7], length 0
15:51:44.709940 ARP, Request who-has 192.168.0.240 tell 192.168.0.169, length 28
15:51:45.760613 ARP, Request who-has 192.168.0.240 tell 192.168.0.169, length 28
15:51:45.775511 IP 192.168.0.223.54602 > 192.168.0.240.http: Flags [S], seq 1839813500, win 29200, options [mss 1460,sackOK,TS val 375712189 ecr 0,nop,wscale 7], length 0
15:51:46.800622 ARP, Request who-has 192.168.0.240 tell 192.168.0.169, length 28
15:51:47.843262 IP 192.168.0.223.54602 > 192.168.0.240.http: Flags [S], seq 1839813500, win 29200, options [mss 1460,sackOK,TS val 375714257 ecr 0,nop,wscale 7], length 0
15:51:47.843482 ARP, Request who-has 192.168.0.240 tell 192.168.0.169, length 28
15:51:48.880572 ARP, Request who-has 192.168.0.240 tell 192.168.0.169, length 28
15:51:49.774953 ARP, Request who-has 192.168.0.240 tell 192.168.0.223, length 46
15:51:49.920602 ARP, Request who-has 192.168.0.240 tell 192.168.0.169, length 28
答案 0 :(得分:1)
在与MetalLB维护人员联系后,他能够找出问题是Debian Buster的新nftables防火墙。要禁用,
# update-alternatives --set iptables /usr/sbin/iptables-legacy
# update-alternatives --set ip6tables /usr/sbin/ip6tables-legacy
# update-alternatives --set arptables /usr/sbin/arptables-legacy
# update-alternatives --set ebtables /usr/sbin/ebtables-legacy
然后重新启动集群中的节点!