git - Pod 不可见

Question

我跟着 Kubecon Seattle 2018 Gitops Tutorial 一切正常，直到第 4 步，
但在第 5 步 podinfo pod 是不可见的。
观看 kubectl 获取 pods

NAME                                            READY   STATUS       RESTARTS AGE     
flux-cb9449876-mr477                            1/1     Running        0     130m    
memcached-57b897cc4-qdm9s                       1/1     Running        0     112m    
nginx-ingress-default-backend-c5449fb44-4hdsk   1/1     Running        0     117m

“kubectl get svc ”的输出

NAME                            TYPE        CLUSTER-IP     EXTERNAL-IP   PORT(S)     AGE
kubernetes                      ClusterIP   10.96.0.1      <none>        443/TCP     55d
memcached                       ClusterIP   None           <none>        11211/TCP   3h8m
nginx-ingress-default-backend   ClusterIP   10.96.38.220   <none>        80/TCP      32d

podinfo 不可用
然后我查了一下日志 kubectl logs deploy/flux -n default -f

ts=2021-01-15T08:34:36.823063265Z caller=main.go:243 version=1.14.2
ts=2021-01-15T08:34:36.823163934Z caller=main.go:372 msg="using in cluster config to connect to the cluster"
ts=2021-01-15T08:34:36.855773345Z caller=main.go:457 component=cluster identity=/etc/fluxd/ssh/identity
ts=2021-01-15T08:34:36.855844999Z caller=main.go:458 component=cluster identity.pub="ssh-rsa AAAAB3NzaC1yc2EAAAADAQABAAABAQDmURfuENXm4nFDeqLxPdWIlR5mxP/iuZvkAJP24+qBnXklLOW8tTSem3gWsXHiUqNYoz2H2GtnxYtE0tbC7hm2whx7sINsYScRZtbvbnbssJOOQVtqet9H8FA6mYNsB9T5OfC6z2P1XEK7meCOpyWFoX1wwfP2U7dp3B1vyilJ3m8Ye/pGp7Cc+JvDQA2h/QnHbnPmJuYSHs70viYGMMQf+iVMF8hUCcHGu+KBBmwHkuWxHnsJGgvK1ogyhTaFBnNA1uS6vZ0YWwG/YUvBDRdJweERH4GjU/r00GFrKRc4VdQtP9gZ0BeeCb/5BQI9Mv2KAtY/CMbW43XqIXIrJtFF"
ts=2021-01-15T08:34:36.855878612Z caller=main.go:463 host=https://10.96.0.1:443 version=kubernetes-v1.19.4
ts=2021-01-15T08:34:36.855945167Z caller=main.go:475 kubectl=/usr/local/bin/kubectl
ts=2021-01-15T08:34:36.857475549Z caller=main.go:487 ping=true
ts=2021-01-15T08:34:41.860632128Z caller=memcached.go:74 component=memcached err="Error setting memcache servers to 'memcached': lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:46398->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:34:41.860715996Z caller=main.go:623 url=git@github.com:adamya21/flux-get-started user="Weave Flux" email=support@weave.works signing-key= verify-signatures=false sync-tag=flux-sync state=git readonly=false notes-ref=flux set-author=false git-secret=false
ts=2021-01-15T08:34:41.860752394Z caller=main.go:724 upstream="no upstream URL given"
ts=2021-01-15T08:34:41.860846781Z caller=main.go:753 metrics-addr=:3031
ts=2021-01-15T08:34:41.861358341Z caller=loop.go:100 component=sync-loop err="git repo not ready: git repo has not been cloned yet"
ts=2021-01-15T08:34:41.861387235Z caller=images.go:17 component=sync-loop msg="polling for new images for automated workloads"
ts=2021-01-15T08:34:41.861397564Z caller=images.go:27 component=sync-loop msg="no automated workloads"
ts=2021-01-15T08:34:41.865215548Z caller=main.go:745 addr=:3030
ts=2021-01-15T08:35:01.919748924Z caller=checkpoint.go:17 component=checkpoint err="Get https://checkpoint-api.weave.works/v1/check/weave-flux?arch=amd64&flag_cluster-version=kubernetes-v1.19.4&flag_git-configured=true&flag_kernel-version=3.10.0-1160.6.1.el7.x86_64&os=linux&signature=b616J%2FpWxkgLWhu2NhuEYNaTZMLW56FVIh0AMl3CsXw%3D&version=1.14.2: dial tcp: lookup checkpoint-api.weave.works on 10.96.0.10:53: read udp 10.244.0.144:41764->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:35:12.049527657Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: context deadline exceeded"
ts=2021-01-15T08:35:32.054751173Z caller=warming.go:154 component=warmer canonical_name=quay.io/coreos/flannel auth={map[]} err="Get https://quay.io/v2/: dial tcp: lookup quay.io on 10.96.0.10:53: read udp 10.244.0.144:44141->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:35:51.869490983Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:37208->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:36:02.055842273Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/function-controller auth={map[]} err="Get https://index.docker.io/v2/: context deadline exceeded"
ts=2021-01-15T08:36:22.062247221Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/http-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:58701->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:36:37.065694566Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/cronjob-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:56255->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:36:51.86884923Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:34696->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:37:07.066591466Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: context deadline exceeded"
ts=2021-01-15T08:37:22.071783513Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/library/memcached auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:50783->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:37:47.255162253Z caller=warming.go:154 component=warmer canonical_name=quay.io/coreos/flannel auth={map[]} err="Get https://quay.io/v2/: dial tcp: lookup quay.io on 10.96.0.10:53: read udp 10.244.0.144:51041->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:37:51.868880178Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:53053->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:38:07.261358033Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/function-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:51588->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:38:22.266596926Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/http-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:45953->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:38:47.271634599Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/cronjob-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:39224->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:38:51.869713463Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:55573->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:39:07.278346046Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:58529->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:39:27.284635089Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/library/memcached auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:38726->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:39:41.862114925Z caller=loop.go:100 component=sync-loop err="git repo not ready: git clone --mirror: fatal: Could not read from remote repository., full output:\n Cloning into bare repository '/tmp/flux-gitclone668030573'...\nssh: Could not resolve hostname github.com: Try again\r\nfatal: Could not read from remote repository.\n\nPlease make sure you have the correct access rights\nand the repository exists.\n"
ts=2021-01-15T08:39:41.862170208Z caller=images.go:17 component=sync-loop msg="polling for new images for automated workloads"
ts=2021-01-15T08:39:41.862181078Z caller=images.go:27 component=sync-loop msg="no automated workloads"
ts=2021-01-15T08:39:51.868216785Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:33252->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:39:52.291631976Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:51894->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:40:12.45973175Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/library/memcached auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:51750->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:40:32.466746085Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:39214->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:40:51.867193019Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:34552->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:40:57.471825512Z caller=warming.go:154 component=warmer canonical_name=quay.io/coreos/flannel auth={map[]} err="Get https://quay.io/v2/: dial tcp: lookup quay.io on 10.96.0.10:53: read udp 10.244.0.144:51462->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:41:17.480755902Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/function-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:41731->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:41:37.485738783Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/http-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:35485->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:41:51.869570177Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:53611->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:42:02.492761138Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/cronjob-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:54251->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:42:22.500097314Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:35717->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:42:37.7075323Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:34092->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:42:51.869000022Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:60617->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:43:07.70982334Z caller=warming.go:154 component=warmer canonical_name=quay.io/coreos/flannel auth={map[]} err="Get https://quay.io/v2/: context deadline exceeded"
ts=2021-01-15T08:43:22.715332273Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/http-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:55661->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:43:47.721153845Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/cronjob-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:53155->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:43:51.868371209Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:38345->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:44:07.725666709Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/function-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:54325->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:44:27.731810955Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:40385->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:44:41.862497835Z caller=loop.go:100 component=sync-loop err="git repo not ready: git clone --mirror: fatal: Could not read from remote repository., full output:\n Cloning into bare repository '/tmp/flux-gitclone840919681'...\nssh: Could not resolve hostname github.com: Try again\r\nfatal: Could not read from remote repository.\n\nPlease make sure you have the correct access rights\nand the repository exists.\n"
ts=2021-01-15T08:44:41.862587482Z caller=images.go:17 component=sync-loop msg="polling for new images for automated workloads"
ts=2021-01-15T08:44:41.862600887Z caller=images.go:27 component=sync-loop msg="no automated workloads"
ts=2021-01-15T08:44:51.868365853Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:55180->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:44:52.739621384Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/library/memcached auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:57758->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:45:12.950133572Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:54777->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:45:32.954843685Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:35571->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:45:52.961057124Z caller=warming.go:154 component=warmer canonical_name=quay.io/coreos/flannel auth={map[]} err="Get https://quay.io/v2/: dial tcp: lookup quay.io on 10.96.0.10:53: read udp 10.244.0.144:56311->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:45:56.869193985Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:37618->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:46:12.967348301Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/function-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:55825->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:46:32.973536104Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/http-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:45545->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:46:56.868726966Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:45892->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:46:57.981027132Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/cronjob-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:40489->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:47:17.986703183Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/library/memcached auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:48203->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:47:38.155044126Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:42154->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:47:51.868894269Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:51534->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:48:03.160403195Z caller=warming.go:154 component=warmer canonical_name=quay.io/coreos/flannel auth={map[]} err="Get https://quay.io/v2/: dial tcp: lookup quay.io on 10.96.0.10:53: read udp 10.244.0.144:35888->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:48:23.165321296Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/cronjob-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:51039->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:48:38.169858629Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/function-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:34557->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:48:51.870002998Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:57020->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:49:08.170398368Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/http-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: context deadline exceeded"
ts=2021-01-15T08:49:08.176751205Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:54320->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:49:23.181095889Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/library/memcached auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:52173->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:49:41.863283527Z caller=loop.go:100 component=sync-loop err="git repo not ready: git clone --mirror: fatal: Could not read from remote repository., full output:\n Cloning into bare repository '/tmp/flux-gitclone961961173'...\nssh: Could not resolve hostname github.com: Try again\r\nfatal: Could not read from remote repository.\n\nPlease make sure you have the correct access rights\nand the repository exists.\n"
ts=2021-01-15T08:49:41.863399735Z caller=images.go:17 component=sync-loop msg="polling for new images for automated workloads"
ts=2021-01-15T08:49:41.863413661Z caller=images.go:27 component=sync-loop msg="no automated workloads"
ts=2021-01-15T08:49:43.352663841Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:58389->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:49:56.869838102Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:36917->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:50:08.359806772Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/library/memcached auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:55293->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:50:23.364739403Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:37486->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:50:43.369517581Z caller=warming.go:154 component=warmer canonical_name=quay.io/coreos/flannel auth={map[]} err="Get https://quay.io/v2/: dial tcp: lookup quay.io on 10.96.0.10:53: read udp 10.244.0.144:54391->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:50:56.869860958Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:37425->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:51:08.374763101Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/function-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:33253->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:51:23.381632821Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/http-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:54799->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:51:43.391650301Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/cronjob-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:45664->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:51:56.922228566Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:39847->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:52:08.577116075Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:34241->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:52:23.583223599Z caller=warming.go:154 component=warmer canonical_name=quay.io/coreos/flannel auth={map[]} err="Get https://quay.io/v2/: dial tcp: lookup quay.io on 10.96.0.10:53: read udp 10.244.0.144:46500->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:52:48.589070754Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/cronjob-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:45452->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:52:56.870406732Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:45356->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:53:08.598299259Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/function-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:49505->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:53:28.603596415Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/http-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:48330->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:53:53.611489439Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:56748->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:53:56.868358268Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:45665->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:54:13.61821865Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/library/memcached auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:36012->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:54:33.77844023Z caller=warming.go:154 component=warmer canonical_name=quay.io/coreos/flannel auth={map[]} err="Get https://quay.io/v2/: dial tcp: lookup quay.io on 10.96.0.10:53: read udp 10.244.0.144:51428->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:54:41.864143047Z caller=loop.go:100 component=sync-loop err="git repo not ready: git clone --mirror: fatal: Could not read from remote repository., full output:\n Cloning into bare repository '/tmp/flux-gitclone112489833'...\nssh: Could not resolve hostname github.com: Try again\r\nfatal: Could not read from remote repository.\n\nPlease make sure you have the correct access rights\nand the repository exists.\n"
ts=2021-01-15T08:54:41.864242844Z caller=images.go:17 component=sync-loop msg="polling for new images for automated workloads"
ts=2021-01-15T08:54:41.86426189Z caller=images.go:27 component=sync-loop msg="no automated workloads"
ts=2021-01-15T08:54:56.8692891Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:60678->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:54:58.785614576Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/cronjob-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:55230->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:55:18.792003267Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/function-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:46652->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:55:38.797160671Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/kubeless/http-trigger-controller auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:54356->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:55:56.869788329Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:39315->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:56:03.804094799Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:37297->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:56:23.808771074Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/library/memcached auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:52093->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:56:38.813264438Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: dial tcp: lookup index.docker.io on 10.96.0.10:53: read udp 10.244.0.144:48563->10.96.0.10:53: read: connection refused"
ts=2021-01-15T08:56:56.869490937Z caller=memcached.go:156 component=memcached err="error updating memcache servers: lookup _memcached._tcp.memcached on 10.96.0.10:53: read udp 10.244.0.144:46779->10.96.0.10:53: i/o timeout"
ts=2021-01-15T08:57:08.958860392Z caller=warming.go:154 component=warmer canonical_name=index.docker.io/fluxcd/flux auth={map[]} err="Get https://index.docker.io/v2/: context deadline exceeded"

那么究竟是什么导致了这个问题呢？是因为根据日志拒绝连接吗？

Answer 1

正如您已经注意到的，您看到的错误意味着您的集群中的 DNS 配置存在问题。为了调试它，我建议使用 Debugging DNS Resolution :

This page provides hints on diagnosing DNS problems.

在那里，您会发现要检查几件事以缩小问题的范围。这些包括:

Check the local DNS configuration

Check if the DNS pod is running

Check for errors in the DNS pod

Check if DNS service is up

Are DNS endpoints exposed?

Are DNS queries being received/processed?

和 Known issues

有时只是重启coredns部署的问题:

kubectl -n kube-system rollout restart deployment coredns

或 installing它新鲜。