Kube flannel in CrashLoopBackOff status 解决办法

admin · 发表于 2025-1-2 17:00:00

kubectl describe pod -n kube-system kube-flannel-ds-amd64-42rl7

Name:             kube-flannel-ds-amd64-42rl7Namespace:
kube-systemPriority:          0PriorityClassName:  <none>
Node:             node5/10.168.209.17
Start Time:       Wed, 22 Aug 2018 16:47:10 +0300Labels:          app=flannel                   controller-revision-hash=911701653                   pod-template-generation=1                   tier=nodeAnnotations:       <none>Status:          RunningIP:                10.168.209.17Controlled By:    DaemonSet/kube-flannel-ds-amd64Init Containers:  install-cni: Container ID:  docker://eb7ee47459a54d401969b1770ff45b39dc5768b0627eec79e189249790270169 Image:       quay.io/coreos/flannel:v0.10.0-amd64 Image ID:    docker-pullable://quay.io/coreos/flannel@sha256:88f2b4d96fae34bfff3d46293f7f18d1f9f3ca026b4a4d288f28347fcb6580ac Port:       <none> Host Port:    <none> Command:    cp Args:    -f    /etc/kube-flannel/cni-conf.json    /etc/cni/net.d/10-flannel.conflist State:       Terminated    Reason:    Completed    Exit Code: 0    Started:    Wed, 22 Aug 2018 16:47:24 +0300    Finished:    Wed, 22 Aug 2018 16:47:24 +0300 Ready:       True Restart Count:  0 Environment: <none> Mounts:    /etc/cni/net.d from cni (rw)    /etc/kube-flannel/ from flannel-cfg (rw)    /var/run/secrets/kubernetes.io/serviceaccount from flannel-token-9wmch (ro)Containers:  kube-flannel: Container ID:  docker://521b457c648baf10f01e26dd867b8628c0f0a0cc0ea416731de658e67628d54e Image:       quay.io/coreos/flannel:v0.10.0-amd64 Image ID:    docker-pullable://quay.io/coreos/flannel@sha256:88f2b4d96fae34bfff3d46293f7f18d1f9f3ca026b4a4d288f28347fcb6580ac Port:       <none> Host Port:    <none> Command:    /opt/bin/flanneld Args:    --ip-masq    --kube-subnet-mgr State:       Waiting    Reason:    CrashLoopBackOff Last State:    Terminated    Reason:    Error    Exit Code: 1    Started:    Thu, 30 Aug 2018 10:15:04 +0300    Finished:    Thu, 30 Aug 2018 10:15:08 +0300 Ready:       False Restart Count:  2136 Limits:    cpu:    100m    memory:  50Mi Requests:    cpu:    100m    memory:  50Mi Environment:    POD_NAME:    kube-flannel-ds-amd64-42rl7 (v1:metadata.name)    POD_NAMESPACE:  kube-system (v1:metadata.namespace) Mounts:    /etc/kube-flannel/ from flannel-cfg (rw)    /run from run (rw)    /var/run/secrets/kubernetes.io/serviceaccount from flannel-token-9wmch (ro)Conditions:  Type             Status  Initialized    True  Ready          False  ContainersReady False  PodScheduled    TrueVolumes:  run: Type:       HostPath (bare host directory volume) Path:       /run HostPathType:  cni: Type:       HostPath (bare host directory volume) Path:       /etc/cni/net.d HostPathType:  flannel-cfg: Type:    ConfigMap (a volume populated by a ConfigMap) Name:    kube-flannel-cfg Optional:  false  flannel-token-9wmch: Type:       Secret (a volume populated by a Secret) SecretName:  flannel-token-9wmch Optional: falseQoS Class:    GuaranteedNode-Selectors:  beta.kubernetes.io/arch=amd64Tolerations:    node-role.kubernetes.io/master:NoSchedule                node.kubernetes.io/disk-pressure:NoSchedule                node.kubernetes.io/memory-pressure:NoSchedule                node.kubernetes.io/not-ready:NoExecute                node.kubernetes.io/unreachable:NoExecuteEvents:  Type    Reason Age                From          Message  ----    ------ ----                ----          -------  Normal Pulled 51m (x2128 over 7d)  kubelet, node5  Container image "quay.io/coreos/flannel:v0.10.0-amd64" already present on machine  Warning  BackOff  1m (x48936 over 7d)  kubelet, node5  Back-off restarting failed container

检查kube-controller-manager.yaml

:apiVersion: v1
kind: Podmetadata:  annotations: scheduler.alpha.kubernetes.io/critical-pod: ""  creationTimestamp: null  labels: component: kube-controller-manager tier: control-plane  name: kube-controller-manager  namespace: kube-systemspec:  containers:  - command: - kube-controller-manager - --address=127.0.0.1 - --allocate-node-cidrs=true - --cluster-cidr=192.168.0.0/24 - --cluster-signing-cert-file=/etc/kubernetes/pki/ca.crt - --cluster-signing-key-file=/etc/kubernetes/pki/ca.key - --controllers=*,bootstrapsigner,tokencleaner - --kubeconfig=/etc/kubernetes/controller-manager.conf - --leader-elect=true - --node-cidr-mask-size=24 - --root-ca-file=/etc/kubernetes/pki/ca.crt - --service-account-private-key-file=/etc/kubernetes/pki/sa.key - --use-service-account-credentials=true image: k8s.gcr.io/kube-controller-manager-amd64:v1.11.2 imagePullPolicy: IfNotPresent livenessProbe:    failureThreshold: 8    httpGet:       host: 127.0.0.1       path: /healthz       port: 10252       scheme: HTTP    initialDelaySeconds: 15    timeoutSeconds: 15 name: kube-controller-manager resources:    requests:       cpu: 200m volumeMounts: - mountPath: /etc/ssl/certs    name: ca-certs    readOnly: true - mountPath: /etc/kubernetes/controller-manager.conf    name: kubeconfig    readOnly: true - mountPath: /usr/libexec/kubernetes/kubelet-plugins/volume/exec    name: flexvolume-dir - mountPath: /etc/pki    name: etc-pki    readOnly: true - mountPath: /etc/kubernetes/pki    name: k8s-certs    readOnly: true  hostNetwork: true  priorityClassName: system-cluster-critical  volumes:  - hostPath:    path: /etc/ssl/certs    type: DirectoryOrCreate name: ca-certs  - hostPath:    path: /etc/kubernetes/controller-manager.conf    type: FileOrCreate name: kubeconfig  - hostPath:    path: /usr/libexec/kubernetes/kubelet-plugins/volume/exec    type: DirectoryOrCreate name: flexvolume-dir  - hostPath:    path: /etc/pki    type: DirectoryOrCreate name: etc-pki  - hostPath:    path: /etc/kubernetes/pki    type: DirectoryOrCreate name: k8s-certsstatus: {}

kubectl logs --namespace kube-system kube-flannel-ds-amd64-5fx2

pmain.go:475] Determining IP address of default interfacemain.go:488]

Using interface with name eth0 and address 10.168.209.14main.go:505] Defaulting external address to interface address (10.168.209.14)kube.go:131] Waiting 10m0s for node controller to synckube.go:294] Starting kube subnet managerkube.go:138] Node controller sync successfulmain.go:235] Created subnet manager: Kubernetes Subnet Manager - node2main.go:238] Installing signal handlersmain.go:353] Found network config - Backend type: vxlanvxlan.go:120] VXLAN config: VNI=1 Port=0 GBP=false DirectRouting=falsemain.go:280] Error registering network: failed to acquire lease: node "node2" pod cidr not assignedmain.go:333] Stopping shutdownHandler...

cat /etc/kubernetes/manifests/kube-controller-manager.yaml | grep -i cluster-cidr- --cluster-cidr=172.168.10.0/24

kubectl patch node podname -p '{"spec":{"podCIDR":"172.168.10.0/24"}}'

例如：kubectl patch node slave-node-1 -p '{"spec":{"podCIDR":"172.168.10.0/24"}}'

sudo ifconfig cni0 down;
sudo ifconfig flannel.1 down;
sudo ip link delete cni0;
sudo ip link delete flannel.1;

To fix this, please following the step below:

Step 0: Reset all Nodes within your Cluster. Run all nodes with
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kubeadm reset --force;

Step 1: Down Interface cni0 and flannel.1.
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sudo ifconfig cni0 down;
# d ~/ m: T8 dsudo ifconfig flannel.1 down;

Step 2: Delete Interface cni0 and flannel.1.
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sudo ip link delete cni0;
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Step 3: Remove all items within /etc/cni/net.d/.
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sudo rm -rf /etc/cni/net.d/;

Step 4: Re-Bootstrap your Kubernetes Cluster again.
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kubeadm init --control-plane-endpoint="..." --pod-network-cidr=10.244.0.0/16;

Step 5: Re-deploy CNIs.
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kubectl apply -f https://raw.githubusercontent.co ... n/kube-flannel.yml;

Step 6: Restart your CNIs, here I used Container Daemon (Containerd).
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systemctl restart containerd;

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