【水文】calico-node 启动失败 Init:CrashLoopBackOff
查看日志报错如下
Defaulted container "calico-node" out of: calico-node, upgrade-ipam (init), install-cni (init), mount-bpffs (init)
Error from server (BadRequest): container "calico-node" in pod "calico-node-4j7td" is waiting to start: PodInitializing
结果：kube-proxy没启动，每个人的环境不同，需要具体排查看日志。下面是分析过程。
一直没看懂上面第一条啥意思，之前搞calico遇到过各种问题，潜意识觉得calico难搞就无脑搜啊搜，以为是疑难杂症，后来网上看到几个相同第一条报错的，才知道没啥价值，浪费了好多时间。
具体错误如下：
[root@k8s-master01 ~]# kubectl logs -n kube-system calico-node-4j7td
Defaulted container "calico-node" out of: calico-node, upgrade-ipam (init), install-cni (init), mount-bpffs (init)
Error from server (BadRequest): container "calico-node" in pod "calico-node-4j7td" is waiting to start: PodInitializing[root@k8s-master01 ~]# kubectl get po -A -owide
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-system calico-kube-controllers-6747f75cdc-pzhhj 1/1 Running 0 52m 172.27.14.194 k8s-node02
kube-system calico-node-4j7td 0/1 Init:CrashLoopBackOff 16 (3m58s ago) 43m 192.168.145.161 k8s-master01
kube-system calico-node-hwttj 1/1 Running 0 52m 192.168.145.162 k8s-master02
【精要】在这个启动失败的节点上，查看容器的日志，如果看不到运行中的容器，就查看exited的容器，如下：
[root@k8s-master01 ~]# crictl ps
CONTAINER IMAGE CREATED STATE NAME ATTEMPT POD ID POD
[root@k8s-master01 ~]# crictl ps -a
CONTAINER IMAGE CREATED STATE NAME ATTEMPT POD ID POD
6e2c272bcbd41 8479c67f450d3 4 minutes ago Exited install-cni 17 0b0d02f6ac576 calico-node-4j7td
5c5f54bbda5db 8479c67f450d3 50 minutes ago Exited upgrade-ipam 1 0b0d02f6ac576 calico-node-4j7td
[root@k8s-master01 ~]# crictl logs 6e2c272bcbd41
time="2022-12-01T15:36:27Z" level=info msg="Running as a Kubernetes pod" source="install.go:145"
2022-12-01 15:36:28.196 [INFO][1] cni-installer/ : File is already up to date, skipping file="/host/opt/cni/bin/bandwidth"
2022-12-01 15:36:28.197 [INFO][1] cni-installer/ : Installed /host/opt/cni/bin/bandwidth
2022-12-01 15:36:28.297 [INFO][1] cni-installer/ : File is already up to date, skipping file="/host/opt/cni/bin/calico"
2022-12-01 15:36:28.297 [INFO][1] cni-installer/ : Installed /host/opt/cni/bin/calico
2022-12-01 15:36:28.373 [INFO][1] cni-installer/ : File is already up to date, skipping file="/host/opt/cni/bin/calico-ipam"
2022-12-01 15:36:28.373 [INFO][1] cni-installer/ : Installed /host/opt/cni/bin/calico-ipam
2022-12-01 15:36:28.376 [INFO][1] cni-installer/ : File is already up to date, skipping file="/host/opt/cni/bin/flannel"
2022-12-01 15:36:28.376 [INFO][1] cni-installer/ : Installed /host/opt/cni/bin/flannel
2022-12-01 15:36:28.381 [INFO][1] cni-installer/ : File is already up to date, skipping file="/host/opt/cni/bin/host-local"
2022-12-01 15:36:28.381 [INFO][1] cni-installer/ : Installed /host/opt/cni/bin/host-local
2022-12-01 15:36:28.447 [INFO][1] cni-installer/ : File is already up to date, skipping file="/host/opt/cni/bin/install"
2022-12-01 15:36:28.447 [INFO][1] cni-installer/ : Installed /host/opt/cni/bin/install
2022-12-01 15:36:28.451 [INFO][1] cni-installer/ : File is already up to date, skipping file="/host/opt/cni/bin/loopback"
2022-12-01 15:36:28.451 [INFO][1] cni-installer/ : Installed /host/opt/cni/bin/loopback
2022-12-01 15:36:28.455 [INFO][1] cni-installer/ : File is already up to date, skipping file="/host/opt/cni/bin/portmap"
2022-12-01 15:36:28.455 [INFO][1] cni-installer/ : Installed /host/opt/cni/bin/portmap
2022-12-01 15:36:28.459 [INFO][1] cni-installer/ : File is already up to date, skipping file="/host/opt/cni/bin/tuning"
2022-12-01 15:36:28.459 [INFO][1] cni-installer/ : Installed /host/opt/cni/bin/tuning
2022-12-01 15:36:28.459 [INFO][1] cni-installer/ : Wrote Calico CNI binaries to /host/opt/cni/bin2022-12-01 15:36:28.494 [INFO][1] cni-installer/ : CNI plugin version: v3.25.0-0.dev-519-g2fee4ee0153d2022-12-01 15:36:28.494 [INFO][1] cni-installer/ : /host/secondary-bin-dir is not writeable, skipping
W1201 15:36:28.494754 1 client_config.go:617] Neither --kubeconfig nor --master was specified. Using the inClusterConfig. This might not work.
2022-12-01 15:36:49.499 [ERROR][1] cni-installer/ : Unable to create token for CNI kubeconfig error=Post "https://10.96.0.1:443/api/v1/namespaces/kube-system/serviceaccounts/calico-node/token": dial tcp 10.96.0.1:443: connect: connection refused
2022-12-01 15:36:49.499 [FATAL][1] cni-installer/ : Unable to create token for CNI kubeconfig error=Post "https://10.96.0.1:443/api/v1/namespaces/kube-system/serviceaccounts/calico-node/token": dial tcp 10.96.0.1:443: connect: connection refused
[root@k8s-master01 ~]#
[root@k8s-master01 ~]#
[root@k8s-master01 ~]#
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# kubectl get svc
NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
kubernetes ClusterIP 10.96.0.1 443/TCP 2d16h
[root@k8s-master01 ~]# kubectl get svc -A
NAMESPACE NAME TYPE CLUSTER-IP EXTERNAL-IP PORT(S) AGE
default kubernetes ClusterIP 10.96.0.1 443/TCP 2d16h
kube-system calico-typha ClusterIP 10.107.84.250 5473/TCP 64m
[root@k8s-master01 ~]#
[root@k8s-master01 ~]#
[root@k8s-master01 ~]# telnet 10.96.0.1 443
Trying 10.96.0.1...
^C
[root@k8s-master01 ~]# ping 10.96.0.1
PING 10.96.0.1 (10.96.0.1) 56(84) bytes of data.
^C
--- 10.96.0.1 ping statistics ---
1 packets transmitted, 0 received, 100% packet loss, time 0ms 上面发现10.96.0.1不通，去其他节点查看是通的
[root@k8s-node02 ~]#
[root@k8s-node02 ~]# telnet 10.96.0.1 443
Trying 10.96.0.1...
Connected to 10.96.0.1.
Escape character is '^]'.
^CConnection closed by foreign host.
[root@k8s-node02 ~]# ping 10.96.0.1
PING 10.96.0.1 (10.96.0.1) 56(84) bytes of data.
64 bytes from 10.96.0.1: icmp_seq=1 ttl=64 time=0.061 ms
64 bytes from 10.96.0.1: icmp_seq=2 ttl=64 time=0.073 ms
^C
--- 10.96.0.1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1057ms
rtt min/avg/max/mdev = 0.061/0.067/0.073/0.006 ms
[root@k8s-node02 ~]# ping 10.96.0.1
PING 10.96.0.1 (10.96.0.1) 56(84) bytes of data.
64 bytes from 10.96.0.1: icmp_seq=1 ttl=64 time=0.056 ms64 bytes from 10.96.0.1: icmp_seq=2 ttl=64 time=0.067 ms
^C
--- 10.96.0.1 ping statistics ---
2 packets transmitted, 2 received, 0% packet loss, time 1003ms
rtt min/avg/max/mdev = 0.056/0.061/0.067/0.009 ms
查看问题节点的代理服务kube-proxy，果然，这个居然是disable，郁闷，启动后，delete掉失败的pod，瞬间好了
[root@k8s-master01 ~]# systemctl status kube-proxy
● kube-proxy.service - Kubernetes Kube ProxyLoaded: loaded (/usr/lib/systemd/system/kube-proxy.service; disabled; vendor preset: disabled)Active: inactive (dead)Docs: https://github.com/kubernetes/kubernetes
[root@k8s-master01 ~]# systemctl enable --now kube-proxy
Created symlink from /etc/systemd/system/multi-user.target.wants/kube-proxy.service to /usr/lib/systemd/system/kube-proxy.service.
[root@k8s-master01 ~]# systemctl status kube-proxy
● kube-proxy.service - Kubernetes Kube ProxyLoaded: loaded (/usr/lib/systemd/system/kube-proxy.service; enabled; vendor preset: disabled)Active: active (running) since Thu 2022-12-01 23:43:25 CST; 2s agoDocs: https://github.com/kubernetes/kubernetesMain PID: 20930 (kube-proxy)Tasks: 7Memory: 52.7MCGroup: /system.slice/kube-proxy.service└─20930 /usr/local/bin/kube-proxy --config=/etc/kubernetes/kube-proxy.yaml --v=2[root@k8s-master01 ~]# kubectl get po -A -owide -w
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-system calico-kube-controllers-6747f75cdc-pzhhj 1/1 Running 0 68m 172.27.14.194 k8s-node02
kube-system calico-node-4j7td 0/1 Init:CrashLoopBackOff 19 (3m27s ago) 58m 192.168.145.161 k8s-master01
kube-system calico-node-hwttj 1/1 Running 0 68m 192.168.145.162 k8s-master02
kube-system calico-node-rjbz8 1/1 Running 0 68m 192.168.145.163 k8s-master03
kube-system calico-node-rmjqj 1/1 Running 1 (55m ago) 68m 192.168.145.165 k8s-node02
kube-system calico-node-vd7w2 1/1 Running 0 68m 192.168.145.164 k8s-node01
kube-system calico-typha-6cdc4b4fbc-sb85z 1/1 Running 0 68m 192.168.145.164 k8s-node01 ^C[root@k8s-master01 ~]# kubectl delete po -n kube-system calico-node-4j7td
pod "calico-node-4j7td" deleted
[root@k8s-master01 ~]# kubectl get po -A -owide -w
NAMESPACE NAME READY STATUS RESTARTS AGE IP NODE NOMINATED NODE READINESS GATES
kube-system calico-kube-controllers-6747f75cdc-pzhhj 1/1 Running 0 68m 172.27.14.194 k8s-node02
kube-system calico-node-hwttj 1/1 Running 0 68m 192.168.145.162 k8s-master02
kube-system calico-node-jbvlc 0/1 Init:1/3 0 2s 192.168.145.161 k8s-master01
kube-system calico-node-rjbz8 1/1 Running 0 68m 192.168.145.163 k8s-master03
kube-system calico-node-rmjqj 1/1 Running 1 (55m ago) 68m 192.168.145.165 k8s-node02
kube-system calico-node-vd7w2 1/1 Running 0 68m 192.168.145.164 k8s-node01
kube-system calico-typha-6cdc4b4fbc-sb85z 1/1 Running 0 68m 192.168.145.164 k8s-node01
kube-system calico-node-jbvlc 0/1 Init:1/3 0 2s 192.168.145.161 k8s-master01
kube-system calico-node-jbvlc 0/1 Init:2/3 0 3s 192.168.145.161 k8s-master01
kube-system calico-node-jbvlc 0/1 PodInitializing 0 4s 192.168.145.161 k8s-master01
kube-system calico-node-jbvlc 0/1 Running 0 5s 192.168.145.161 k8s-master01
^C[root@k8s-master01 ~]#
世上无难事，只怕有心人还不够，要有脑子，不要浪费不该浪费的时间。
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