The Pod loops back to itself through the Service and cilium currently only supports IPv4 ？ #2007

weizhoublue · 2023-07-06T06:10:33Z

action url: https://github.com/spidernet-io/spiderpool/actions/runs/5472017414

ty-dc · 2023-07-06T08:09:21Z

When the default cni is cilium, the macvlan IP of the pod cannot be accessed in the host.

https://github.com/spidernet-io/cni-plugins/blob/00af686014ae889f1730b13e3a2c3ae2f1eea0c5/test/e2e/common/const.go#L56

/home/ty-test# kubectl exec -ti spiderdoctor-agent-gthhr -n kube-system -- sh
# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: net1@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
    link/ether 6e:21:3a:70:81:d1 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 172.18.40.23/16 brd 172.18.255.255 scope global net1
       valid_lft forever preferred_lft forever
    inet6 fc00:f853:ccd:e793:f::97/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::6c21:3aff:fe70:81d1/64 scope link
       valid_lft forever preferred_lft forever
26: eth0@if27: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether ba:65:7c:7b:dd:f6 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 10.244.64.78/32 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fd00:10:244::21/128 scope global nodad
       valid_lft forever preferred_lft forever
    inet6 fe80::b865:7cff:fe7b:ddf6/64 scope link
       valid_lft forever preferred_lft forever
# exit
root@cyclinder3:/home/ty-test# docker exec -ti 3bec3d6c8287 bash
root@ty-spider-worker:/# ping 172.18.40.23
PING 172.18.40.23 (172.18.40.23) 56(84) bytes of data.
^C
--- 172.18.40.23 ping statistics ---
81 packets transmitted, 0 received, 100% packet loss, time 81898ms

root@ty-spider-worker:/# ping 172.18.40.23 -c 2
PING 172.18.40.23 (172.18.40.23) 56(84) bytes of data.

在实际调试过程中，不论 kdoctor 检测成功或者失败，在主机上访问 pod 的 macvlan IP 都会失败。

weizhoublue · 2023-07-06T11:15:03Z

node request -> pod responce -> pod lxc ( ebpf drop )

I think this is dropped by cilium

weizhoublue · 2023-07-06T11:16:37Z

这个优先级不高， overlay 场景下，主机并不需要访问 underlay ip，主机只会用 cilium pod ip 来做健康检查

cyclinder · 2023-07-06T11:27:18Z

spidernet-io/cni-plugins#143 (comment)

weizhoublue · 2023-07-10T04:43:24Z

这个用例失败，不是因为 node要直接访问 pod underlay IP 的原因把？是两个跨主机的 pod 的 underlay ip 不通？

我猜是 macvlan 不能去用 cilium 管理的 eth0，而是要单独用一张卡，这样，cilium 的过滤规则就管控不到了 ( 也许需要设置 cilium 的 helm device 选项)

ty-dc · 2023-07-10T05:21:25Z

两个跨主机的 pod 的 underlay ip 可以通？

/home/ty-test/spiderpool# kubectl get po -n kube-system |grep spiderdoctor
spiderdoctor-agent-62jjz                          1/1     Running     0          5m57s
spiderdoctor-agent-6xxdt                          1/1     Running     0          5m57s

/home/ty-test/spiderpool# kubectl exec -ti spiderdoctor-agent-62jjz -n kube-system -- ip a show net1
2: net1@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
    link/ether c6:f9:2b:d9:30:3c brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 172.18.40.121/16 brd 172.18.255.255 scope global net1
       valid_lft forever preferred_lft forever
    inet6 fc00:f853:ccd:e793:f::a2/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::c4f9:2bff:fed9:303c/64 scope link
       valid_lft forever preferred_lft forever

kubectl exec -ti spiderdoctor-agent-6xxdt  -n kube-system -- ip a show net1
2: net1@if2: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default
    link/ether 7a:f5:ed:5b:b1:06 brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 172.18.40.146/16 brd 172.18.255.255 scope global net1
       valid_lft forever preferred_lft forever
    inet6 fc00:f853:ccd:e793:f::57/64 scope global
       valid_lft forever preferred_lft forever
    inet6 fe80::78f5:edff:fe5b:b106/64 scope link
       valid_lft forever preferred_lft forever

/home/ty-test/spiderpool# kubectl exec -ti spiderdoctor-agent-62jjz -n kube-system -- ping 172.18.40.146 -c 2
PING 172.18.40.146 (172.18.40.146) 56(84) bytes of data.
64 bytes from 172.18.40.146: icmp_seq=1 ttl=64 time=0.083 ms
64 bytes from 172.18.40.146: icmp_seq=2 ttl=64 time=0.103 ms

--- 172.18.40.146 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1019ms
rtt min/avg/max/mdev = 0.083/0.093/0.103/0.010 ms

spiderdoctor 测试时，关掉这个 taget ，应该就好了？

  success:
    meanAccessDelayInMs: 15000
    successRate: 1
  target:
    targetAgent:
      testClusterIp: true
      testEndpoint: true
      testIPv4: true
      testIPv6: true
      testIngress: false
      testLoadBalancer: false
      testMultusInterface: false
      testNodePort: true

cyclinder · 2023-07-10T05:29:52Z

可能是testNodePort失败导致的，在macvlan-underlay模式下访问NodePort是有已知问题的
spidernet-io/cni-plugins#142

weizhoublue · 2023-07-10T05:55:40Z

可能是testNodePort失败导致的，在macvlan-underlay模式下访问NodePort是有已知问题的
spidernet-io/cni-plugins#142

这是个 overlay mode 用例，为什么和 macvlan-underlay模式有关系

weizhoublue · 2023-07-10T06:21:17Z

没有有做根因分析？不能失败什么关什么

cyclinder · 2023-07-10T06:47:03Z

在看，v6的clusterip 访问有点问题

cyclinder · 2023-07-10T07:17:08Z

这个环境cilium pod访问svc(ep为自己)不通

root@cyclinder3:~/cyclinder# kubectl  get po -o wide
NAME                        READY   STATUS    RESTARTS   AGE    IP             NODE                      NOMINATED NODE   READINESS GATES
test-6ccdcc86df-g78dn       1/1     Running   0          3m4s   10.244.65.2    ty-spider-control-plane   <none>           <none>
test-6ccdcc86df-vvgz6       1/1     Running   0          4m9s   10.244.64.25   ty-spider-worker          <none>           <none>
test-pod-85c445cb44-9nnv9   1/1     Running   0          4d     172.18.40.38   ty-spider-worker          <none>           <none>
root@cyclinder3:~/cyclinder# kubectl  describe svc test-ipv6
Name:                     test-ipv6
Namespace:                default
Labels:                   <none>
Annotations:              <none>
Selector:                 app=test
Type:                     LoadBalancer
IP Family Policy:         SingleStack
IP Families:              IPv6
IP:                       fd00:10:233::e5f
IPs:                      fd00:10:233::e5f
Port:                     http  80/TCP
TargetPort:               80/TCP
NodePort:                 http  32686/TCP
Endpoints:                [fd00:10:244::128]:80,[fd00:10:244::70]:80
Session Affinity:         None
External Traffic Policy:  Cluster
Events:                   <none>
root@cyclinder3:~/cyclinder# kubectl exec -it test-6ccdcc86df-g78dn -- curl [fd00:10:233::e5f]:80
^Ccommand terminated with exit code 130
root@cyclinder3:~/cyclinder# kubectl exec -it test-6ccdcc86df-g78dn -- curl [fd00:10:233::e5f]:80
^Ccommand terminated with exit code 130
root@cyclinder3:~/cyclinder# kubectl exec -it test-6ccdcc86df-g78dn -- curl [fd00:10:233::e5f]:80
{"clientIp":"[fd00:10:244::128]:42540","otherDetail":{"/spiderdoctoragent":"route to print request"},"requestHeader":{"Accept":" */* ","User-Agent":" curl/7.81.0 "},"requestUrl":"/","serverName":"test-6ccdcc86df-vvgz6"}
root@cyclinder3:~/cyclinder# kubectl exec -it test-6ccdcc86df-g78dn -- curl [fd00:10:233::e5f]:80
^Ccommand terminated with exit code 130
root@cyclinder3:~/cyclinder# kubectl exec -it test-6ccdcc86df-g78dn -- ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
43: eth0@if44: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 22:4a:3d:eb:1e:7f brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 10.244.65.2/32 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fd00:10:244::128/128 scope global nodad
       valid_lft forever preferred_lft forever
    inet6 fe80::204a:3dff:feeb:1e7f/64 scope link
       valid_lft forever preferred_lft forever

root@ty-spider-control-plane:/home/cilium# cilium monitor --from 541
Listening for events on 16 CPUs with 64x4096 of shared memory
Press Ctrl-C to quit
level=info msg="Initializing dissection cache..." subsys=monitor
-> endpoint 541 flow 0xb522b447 , identity 13262->13262 state new ifindex lxc3c38e607befa orig-ip fd00:10:244::128: [fd00:10:244::128]:51788 -> [fd00:10:244::128]:80 tcp SYN
-> endpoint 541 flow 0x8f414a02 , identity 13262->13262 state established ifindex lxc3c38e607befa orig-ip fd00:10:244::128: [fd00:10:244::128]:51788 -> [fd00:10:244::128]:80 tcp SYN
-> endpoint 541 flow 0xcf3d762b , identity 13262->13262 state established ifindex lxc3c38e607befa orig-ip fd00:10:244::128: [fd00:10:244::128]:51788 -> [fd00:10:244::128]:80 tcp SYN
-> endpoint 541 flow 0xcf988979 , identity 13262->13262 state established ifindex lxc3c38e607befa orig-ip fd00:10:244::128: [fd00:10:244::128]:51788 -> [fd00:10:244::128]:80 tcp SYN
-> endpoint 541 flow 0x8aa61064 , identity 13262->13262 state established ifindex lxc3c38e607befa orig-ip fd00:10:244::128: [fd00:10:244::128]:51788 -> [fd00:10:244::128]:80 tcp SYN
-> endpoint 541 flow 0xa34f043f , identity 13262->13262 state established ifindex lxc3c38e607befa orig-ip fd00:10:244::128: [fd00:10:244::128]:51788 -> [fd00:10:244::128]:80 tcp SYN

root@cyclinder3:~/cyclinder# kubectl exec -it test-6ccdcc86df-g78dn bash
kubectl exec [POD] [COMMAND] is DEPRECATED and will be removed in a future version. Use kubectl exec [POD] -- [COMMAND] instead.
root@test-6ccdcc86df-g78dn:/# curl [fd00:10:233::e5f]:80
curl: (28) Failed to connect to fd00:10:233::e5f port 80 after 129673 ms: Connection timed out
root@test-6ccdcc86df-g78dn:/# ip a
1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
43: eth0@if44: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc noqueue state UP group default qlen 1000
    link/ether 22:4a:3d:eb:1e:7f brd ff:ff:ff:ff:ff:ff link-netnsid 0
    inet 10.244.65.2/32 scope global eth0
       valid_lft forever preferred_lft forever
    inet6 fd00:10:244::128/128 scope global nodad
       valid_lft forever preferred_lft forever
    inet6 fe80::204a:3dff:feeb:1e7f/64 scope link
       valid_lft forever preferred_lft forever

cyclinder · 2023-07-10T11:25:52Z

This may be a cilium bug, and until we confirm this issue, I recommend setting testIPv6 to false.

cilium/cilium#26733

ty-dc · 2023-07-10T12:57:36Z

This may be a cilium bug, and until we confirm this issue, I recommend setting testIPv6 to false.

#2015

weizhoublue · 2023-07-11T02:28:28Z

from julianwiedmann:
that sounds like a feature (pod looping back to itself through a Service) that is currently only supported for IPv4.

cyclinder · 2023-07-11T02:54:46Z

  success:
    meanAccessDelayInMs: 15000
    successRate: 1
  target:
    targetAgent:
      testClusterIp: true
      testEndpoint: true
      testIPv4: true
      testIPv6: false
      testIngress: false
      testLoadBalancer: false
      testMultusInterface: true
      testNodePort: true

testMultusInterface is works, so we should set it to true, only disable testIPv6

weizhoublue added the kind/ci-bug label Jul 6, 2023

weizhoublue assigned Icarus9913 and ty-dc Jul 6, 2023

weizhoublue assigned cyclinder Jul 6, 2023

This was referenced Jul 10, 2023

Nightly K8s Matrix CI 2023-07-07: Failed #2016

Closed

Nightly K8s Matrix CI 2023-07-06: Failed #2013

Closed

ty-dc mentioned this issue Jul 11, 2023

Night CI 2023-07-10: Failed #2029

Closed

ty-dc added kind/bug and removed kind/ci-bug labels Jul 11, 2023

ty-dc added the kind/ci-bug label Jul 11, 2023

ty-dc changed the title ~~Night CI 2023-07-06: Failed~~ The Pod loops back to itself through the Service, and cilium currently only supports IPv4 ？ Jul 11, 2023

ty-dc changed the title ~~The Pod loops back to itself through the Service, and cilium currently only supports IPv4 ？~~ The Pod loops back to itself through the Service and cilium currently only supports IPv4 ？ Jul 11, 2023

ty-dc added enhancement source codes enhancement and removed kind/bug labels Oct 27, 2023

cyclinder added kind/feature and removed kind/ci-bug labels Mar 8, 2024

Icarus9913 removed their assignment Apr 7, 2024

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The Pod loops back to itself through the Service and cilium currently only supports IPv4 ？ #2007

The Pod loops back to itself through the Service and cilium currently only supports IPv4 ？ #2007

weizhoublue commented Jul 6, 2023

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cyclinder commented Jul 10, 2023

ty-dc commented Jul 10, 2023

weizhoublue commented Jul 11, 2023

cyclinder commented Jul 11, 2023

The Pod loops back to itself through the Service and cilium currently only supports IPv4 ？ #2007

The Pod loops back to itself through the Service and cilium currently only supports IPv4 ？ #2007

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