Flannel interface disappears when restarting wireguard
On my test cluster, I am using Kubernetes with Flannel as the overlay network. I'm also using Wireguard for a vpn and p2p connections between each kubernetes node.
All node-to-node and container-to-container traffic works fine, and I can confirm the traffic goes over the wg0 (wireguard) interface. Traffic basically flows from a container to docker0 to cni0 (I think) to flannel.1 to wg0 to outside the server.
My problem is that whenever I restart wireguard with systemctl restart wg-quick@wg0, the wg0 interface is quickly removed and re-added which causes the flannel.1 interface to disappear entirely.
I can get the flannel.1 interface back by running kubectl --namespace=kube-system delete pod -l app=flannel, but this isn't always quick and cross-host network connectivity is disrupted until the new pods are running.
I deployed flannel on kubernetes by applying https://github.com/coreos/flannel/blob/v0.10.0/Documentation/kube-flannel.yml but with --iface=wg0 added to the flanneld args.
Is there a way to get flannel to recognize it's interface is missing and bring it back up, or some other workaround to achieve similar results?
kubernetes flannel asked Nov 21 '18 at 21:45
user2514458user2514458
84
add a comment |
On my test cluster, I am using Kubernetes with Flannel as the overlay network. I'm also using Wireguard for a vpn and p2p connections between each kubernetes node.
All node-to-node and container-to-container traffic works fine, and I can confirm the traffic goes over the wg0 (wireguard) interface. Traffic basically flows from a container to docker0 to cni0 (I think) to flannel.1 to wg0 to outside the server.
My problem is that whenever I restart wireguard with systemctl restart wg-quick@wg0, the wg0 interface is quickly removed and re-added which causes the flannel.1 interface to disappear entirely.
I can get the flannel.1 interface back by running kubectl --namespace=kube-system delete pod -l app=flannel, but this isn't always quick and cross-host network connectivity is disrupted until the new pods are running.
I deployed flannel on kubernetes by applying https://github.com/coreos/flannel/blob/v0.10.0/Documentation/kube-flannel.yml but with --iface=wg0 added to the flanneld args.
Is there a way to get flannel to recognize it's interface is missing and bring it back up, or some other workaround to achieve similar results?
kubernetes flannel asked Nov 21 '18 at 21:45
user2514458user2514458
84
add a comment |
On my test cluster, I am using Kubernetes with Flannel as the overlay network. I'm also using Wireguard for a vpn and p2p connections between each kubernetes node.
All node-to-node and container-to-container traffic works fine, and I can confirm the traffic goes over the wg0 (wireguard) interface. Traffic basically flows from a container to docker0 to cni0 (I think) to flannel.1 to wg0 to outside the server.
My problem is that whenever I restart wireguard with systemctl restart wg-quick@wg0, the wg0 interface is quickly removed and re-added which causes the flannel.1 interface to disappear entirely.
I can get the flannel.1 interface back by running kubectl --namespace=kube-system delete pod -l app=flannel, but this isn't always quick and cross-host network connectivity is disrupted until the new pods are running.
I deployed flannel on kubernetes by applying https://github.com/coreos/flannel/blob/v0.10.0/Documentation/kube-flannel.yml but with --iface=wg0 added to the flanneld args.
Is there a way to get flannel to recognize it's interface is missing and bring it back up, or some other workaround to achieve similar results?
kubernetes flannel asked Nov 21 '18 at 21:45
user2514458user2514458
84
On my test cluster, I am using Kubernetes with Flannel as the overlay network. I'm also using Wireguard for a vpn and p2p connections between each kubernetes node.
All node-to-node and container-to-container traffic works fine, and I can confirm the traffic goes over the wg0 (wireguard) interface. Traffic basically flows from a container to docker0 to cni0 (I think) to flannel.1 to wg0 to outside the server.
My problem is that whenever I restart wireguard with systemctl restart wg-quick@wg0, the wg0 interface is quickly removed and re-added which causes the flannel.1 interface to disappear entirely.
I can get the flannel.1 interface back by running kubectl --namespace=kube-system delete pod -l app=flannel, but this isn't always quick and cross-host network connectivity is disrupted until the new pods are running.
I deployed flannel on kubernetes by applying https://github.com/coreos/flannel/blob/v0.10.0/Documentation/kube-flannel.yml but with --iface=wg0 added to the flanneld args.
Is there a way to get flannel to recognize it's interface is missing and bring it back up, or some other workaround to achieve similar results?
kubernetes flannel kubernetes flannel asked Nov 21 '18 at 21:45
user2514458user2514458
84
asked Nov 21 '18 at 21:45
user2514458user2514458
84
asked Nov 21 '18 at 21:45
user2514458user2514458
84
asked Nov 21 '18 at 21:45
user2514458user2514458
84
asked Nov 21 '18 at 21:45
user2514458user2514458
84
84
add a comment |
add a comment |
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