我已经使用Terraform设置了一个k8s集群,并且正在DigitalOcean上运行它-我正在使用CoreOS作为托管OS。
我为traefik入口指定了以下nodePorts: -30080 -30443
我创建了DigitalOcean FW规则,该规则允许传入流量到k8s群集中每个节点上的那些端口。 我创建了DigitalOcean LB规则,在k8s节点上将流量从端口80路由到30080,从443路由到30443。
我尝试访问traefik仪表板(我已将其显式显示为traefik.my.domain),但未成功。 我尝试通过telnet连接到每个节点的端口30080,但事实证明,该端口也不成功。
我怀疑iptables在当前情况下可能会起作用,但是我不确定。
kubectl -n kube-system描述服务流量
Name: traefik
Namespace: kube-system
Labels: app=traefik
chart=traefik-1.43.0
heritage=Tiller
release=traefik
Annotations: <none>
Selector: app=traefik,release=traefik
Type: NodePort
IP: 10.3.169.94
Port: http 80/TCP
TargetPort: http/TCP
NodePort: http 30080/TCP
Endpoints: 10.2.3.2:80
Port: https 443/TCP
TargetPort: httpn/TCP
NodePort: https 30443/TCP
Endpoints: 10.2.3.2:8880
Session Affinity: None
External Traffic Policy: Local
Events: <none>
sudo iptables --list-rules
sudo iptables --list-rules
-P INPUT ACCEPT
-P FORWARD ACCEPT
-P OUTPUT ACCEPT
-N DOCKER
-N DOCKER-ISOLATION-STAGE-1
-N DOCKER-ISOLATION-STAGE-2
-N DOCKER-USER
-N KUBE-EXTERNAL-SERVICES
-N KUBE-FIREWALL
-N KUBE-FORWARD
-N KUBE-SERVICES
-A INPUT -m conntrack --ctstate NEW -m comment --comment "kubernetes externally-visible service portals" -j KUBE-EXTERNAL-SERVICES
-A INPUT -j KUBE-FIREWALL
-A FORWARD -m comment --comment "kubernetes forwarding rules" -j KUBE-FORWARD
-A FORWARD -j DOCKER-USER
-A FORWARD -j DOCKER-ISOLATION-STAGE-1
-A FORWARD -o docker0 -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A FORWARD -o docker0 -j DOCKER
-A FORWARD -i docker0 ! -o docker0 -j ACCEPT
-A FORWARD -i docker0 -o docker0 -j ACCEPT
-A FORWARD -s 10.2.0.0/16 -j ACCEPT
-A FORWARD -d 10.2.0.0/16 -j ACCEPT
-A OUTPUT -m conntrack --ctstate NEW -m comment --comment "kubernetes service portals" -j KUBE-SERVICES
-A OUTPUT -j KUBE-FIREWALL
-A DOCKER-ISOLATION-STAGE-1 -i docker0 ! -o docker0 -j DOCKER-ISOLATION-STAGE-2
-A DOCKER-ISOLATION-STAGE-1 -j RETURN
-A DOCKER-ISOLATION-STAGE-2 -o docker0 -j DROP
-A DOCKER-ISOLATION-STAGE-2 -j RETURN
-A DOCKER-USER -j RETURN
-A KUBE-FIREWALL -m comment --comment "kubernetes firewall for dropping marked packets" -m mark --mark 0x8000/0x8000 -j DROP
-A KUBE-FORWARD -m comment --comment "kubernetes forwarding rules" -m mark --mark 0x4000/0x4000 -j ACCEPT
-A KUBE-FORWARD -s 10.2.0.0/16 -m comment --comment "kubernetes forwarding conntrack pod source rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
-A KUBE-FORWARD -d 10.2.0.0/16 -m comment --comment "kubernetes forwarding conntrack pod destination rule" -m conntrack --ctstate RELATED,ESTABLISHED -j ACCEPT
有人可以指出导致连接问题的原因吗? iptables有问题吗?