第 14 章 服务网络故障排除

流程

1. 检查站点状态：

   $ skupper status --namespace west
   
   Skupper is enabled for namespace "west" in interior mode. It is connected to 2 other sites. It has 1 exposed services.

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   输出显示：

   • 指定命名空间中存在一个站点。
   • 存在于其他两个站点的链接。
   • 服务在服务网络上公开，可从此命名空间访问。

2. 检查服务网络：

   $ skupper network status
   Sites:
   ├─ [local] a960b766-20bd-42c8-886d-741f3a9f6aa2(west)
   │  │ namespace: west
   │  │ site name: west
   │  │ version: 1.9.1
   │  ╰─ Linked sites:
   │     ├─ 496ca1de-0c80-4e70-bbb4-d0d6ec2a09c0(east)
   │     │  direction: outgoing
   │     ╰─ 484cccc3-401c-4c30-a6ed-73382701b18a()
   │        direction: incoming
   ├─ [remote] 496ca1de-0c80-4e70-bbb4-d0d6ec2a09c0(east)
   │  │ namespace: east
   │  │ site name: east
   │  │ version: 1.9.1
   │  ╰─ Linked sites:
   │     ╰─ a960b766-20bd-42c8-886d-741f3a9f6aa2(west)
   │        direction: incoming
   ╰─ [remote] 484cccc3-401c-4c30-a6ed-73382701b18a()
      │ site name: vm-user-c3d98
      │ version: 1.9.1
      ╰─ Linked sites:
         ╰─ a960b766-20bd-42c8-886d-741f3a9f6aa2(west)
            direction: outgoing

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   注意

   如果输出不是预期的内容，在继续操作前，您可能需要检查链接。

   输出显示：

   • 服务网络 vm-user-c3d98、east 和 west 上有 3 个站点。
   • 每个站点的详情，如命名空间名称。

3. 检查服务网络上公开的服务状态(-v 仅在 Kubernetes 上可用)：

   $ skupper service status -v
   Services exposed through Skupper:
   ╰─ backend:8080 (tcp)
      ╰─ Sites:
         ├─ 4d80f485-52fb-4d84-b10b-326b96e723b2(west)
         │  policy: disabled
         ╰─ 316fbe31-299b-490b-9391-7b46507d76f1(east)
            │ policy: disabled
            ╰─ Targets:
               ╰─ backend:8080 name=backend-9d84544df-rbzjx

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   输出显示了 后端服务 以及该服务的相关目标。

   注意

   作为输出的一部分，每个站点都会报告该集群上的策略系统的状态。

4. 列出站点的 Skupper 事件：

   $ skupper debug events
   NAME                         COUNT                                                          AGE
   GatewayQueryRequest          3                                                              9m12s
                                3     gateway request                                          9m12s
   SiteQueryRequest             3                                                              9m12s
                                3     site data request                                        9m12s
   ServiceControllerEvent       9                                                              10m24s
                                2     service event for west/frontend                          10m24s
                                1     service event for west/backend                           10m26s
                                1     Checking service for: backend                            10m26s
                                2     Service definitions have changed                         10m26s
                                1     service event for west/skupper-router                    11m4s
   DefinitionMonitorEvent       15                                                             10m24s
                                2     service event for west/frontend                          10m24s
                                1     service event for west/backend                           10m26s
                                1     Service definitions have changed                         10m26s
                                5     deployment event for west/frontend                       10m34s
                                1     deployment event for west/skupper-service-controller     11m4s
   ServiceControllerUpdateEvent 1                                                              10m26s
                                1     Updating skupper-internal                                10m26s
   ServiceSyncEvent             3                                                              10m26s
                                1     Service interface(s) added backend                       10m26s
                                1     Service sync sender connection to                        11m4s
                                      amqps://skupper-router-local.west.svc.cluster.local:5671
                                      established
                                1     Service sync receiver connection to                      11m4s
                                      amqps://skupper-router-local.west.svc.cluster.local:5671
                                      established
   IpMappingEvent               5                                                              10m34s
                                1     172.17.0.7 mapped to frontend-6b4688bf56-rp9hc           10m34s
                                2      mapped to frontend-6b4688bf56-rp9hc                     10m54s
                                1     172.17.0.4 mapped to                                     11m4s
                                      skupper-service-controller-6c97c5cf5d-6nzph
                                1     172.17.0.3 mapped to skupper-router-547dffdcbf-l8pdc     11m4s
   TokenClaimVerification       1                                                              10m59s
                                1     Claim for efe3a241-3e4f-11ed-95d0-482ae336eb38 succeeded 10m59s

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   输出显示了正在链接的站点，以及在服务网络上公开的服务。但是，在报告问题时，这个输出最有用，并包含在 Skupper debug tar 文件中。

5. 列出站点的 Kubernetes 事件：

   kubectl get events | grep "deployment/skupper-service-controller"
   10m         Normal    ServiceSyncEvent               deployment/skupper-service-controller   Service sync receiver connection to amqps://skupper-router-local.private1.svc.cluster.local:5671 established
   10m         Normal    ServiceSyncEvent               deployment/skupper-service-controller   Service sync sender connection to amqps://skupper-router-local.private1.svc.cluster.local:5671 established
   10m         Normal    ServiceControllerCreateEvent   deployment/skupper-service-controller   Creating service productcatalogservice
   7m59s       Normal    TokenHandler                   deployment/skupper-service-controller   Connecting using token link1
   7m54s       Normal    TokenHandler                   deployment/skupper-service-controller   Connecting using token link2

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   输出显示了与 Kubernetes 资源相关的事件。