在Kubernetes安装过程中绒布网络出现故障，请提出如何解决此问题的建议 [英] Flannel network failing during Kubernetes installation, please suggest how to fix this
问题描述
我尝试了以下步骤在Ubuntu上安装kubernetes master.
I tried below steps to install a kubernetes master on Ubuntu.
https://www.techrepublic.com/article/how-to-quickly-install-kubernetes-on-ubuntu/#postComments
在部署pod网络阶段:sudo kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml sudo kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/k8s-manifests/kube-flannel-rbac.yml
At the deploying pod network stage: sudo kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/kube-flannel.yml sudo kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/master/Documentation/k8s-manifests/kube-flannel-rbac.yml
创建了容器.但是，法兰绒容器失败了.uday @ k8s-master:〜$ sudo kubectl获取pods --all-namespaces
Containers are created.But, the flannel container is failing. uday@k8s-master:~$ sudo kubectl get pods --all-namespaces
NAMESPACE NAME READY STATUS RESTARTS AGE
kube-system coredns-6955765f44-jkpvd 0/1 ContainerCreating 0 15m
kube-system coredns-6955765f44-rf6fs 0/1 ContainerCreating 0 15m
kube-system etcd-k8s-master 1/1 Running 0 15m
kube-system kube-apiserver-k8s-master 1/1 Running 0 15m
kube-system kube-controller-manager-k8s-master 1/1 Running 0 15m
kube-system kube-flannel-ds-amd64-g8s4z 0/1 CrashLoopBackOff 7 13m
kube-system kube-proxy-mzwdj 1/1 Running 0 15m
kube-system kube-scheduler-k8s-master 1/1 Running 0 15m
当我描述吊舱时:uday @ k8s-master:〜$ kubectl描述pod kube-flannel-ds-amd64-g8s4z -n kube-system
When I describe the pod: uday@k8s-master:~$ kubectl describe pod kube-flannel-ds-amd64-g8s4z -n kube-system
Name: kube-flannel-ds-amd64-g8s4z
Namespace: kube-system
Priority: 0
Node: k8s-master/10.0.0.4
Start Time: Wed, 25 Mar 2020 10:00:56 +0000
Labels: app=flannel
controller-revision-hash=776876f95c
pod-template-generation=1
tier=node
Annotations: <none>
Status: Running
IP: 10.0.0.4
IPs:
IP: 10.0.0.4
Controlled By: DaemonSet/kube-flannel-ds-amd64
Init Containers:
install-cni:
Container ID: docker://0b011d6cc4a2e21514c953ea4c874ebc9c3218fd69b8284fbbbc90b94531db8d
Image: quay.io/coreos/flannel:v0.12.0-amd64
Image ID: docker-pullable://quay.io/coreos/flannel@sha256:6d451d92c921f14bfb38196aacb6e506d4593c5b3c9d40a8b8a2506010dc3e10
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, 25 Mar 2020 10:01:08 +0000
Finished: Wed, 25 Mar 2020 10:01:08 +0000
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-f5tgn (ro)
Containers:
kube-flannel:
Container ID: docker://b2385667e9ab25842a828795210214934ed9d14aaa4b17ff1947151dbbdee433
Image: quay.io/coreos/flannel:v0.12.0-amd64
Image ID: docker-pullable://quay.io/coreos/flannel@sha256:6d451d92c921f14bfb38196aacb6e506d4593c5b3c9d40a8b8a2506010dc3e10
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: Wed, 25 Mar 2020 10:12:39 +0000
Finished: Wed, 25 Mar 2020 10:12:40 +0000
Ready: False
Restart Count: 7
Limits:
cpu: 100m
memory: 50Mi
Requests:
cpu: 100m
memory: 50Mi
Environment:
POD_NAME: kube-flannel-ds-amd64-g8s4z (v1:metadata.name)
POD_NAMESPACE: kube-system (v1:metadata.namespace)
Mounts:
/etc/kube-flannel/ from flannel-cfg (rw)
/run/flannel from run (rw)
/var/run/secrets/kubernetes.io/serviceaccount from flannel-token-f5tgn (ro)
Conditions:
Type Status
Initialized True
Ready False
ContainersReady False
PodScheduled True
Volumes:
run:
Type: HostPath (bare host directory volume)
Path: /run/flannel
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-f5tgn:
Type: Secret (a volume populated by a Secret)
SecretName: flannel-token-f5tgn
Optional: false
QoS Class: Burstable
Node-Selectors: <none>
Tolerations: :NoSchedule
node.kubernetes.io/disk-pressure:NoSchedule
node.kubernetes.io/memory-pressure:NoSchedule
node.kubernetes.io/network-unavailable:NoSchedule
node.kubernetes.io/not-ready:NoExecute
node.kubernetes.io/pid-pressure:NoSchedule
node.kubernetes.io/unreachable:NoExecute
node.kubernetes.io/unschedulable:NoSchedule
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 15m default-scheduler Successfully assigned kube-system/kube-flannel-ds-amd64-g8s4z to k8s-master
Normal Pulling 15m kubelet, k8s-master Pulling image "quay.io/coreos/flannel:v0.12.0-amd64"
Normal Pulled 14m kubelet, k8s-master Successfully pulled image "quay.io/coreos/flannel:v0.12.0-amd64"
Normal Created 14m kubelet, k8s-master Created container install-cni
Normal Started 14m kubelet, k8s-master Started container install-cni
Normal Started 13m (x4 over 14m) kubelet, k8s-master Started container kube-flannel
Normal Pulled 13m (x5 over 14m) kubelet, k8s-master Container image "quay.io/coreos/flannel:v0.12.0-amd64" already present on machine
Normal Created 13m (x5 over 14m) kubelet, k8s-master Created container kube-flannel
Warning BackOff 0s (x68 over 14m) kubelet, k8s-master Back-off restarting failed container
请让我知道解决此问题的步骤.
Please let me the know steps to troubleshoot this.
推荐答案
要使法兰绒正常工作，必须将
-pod-network-cidr = 10.244.0.0/16传递给kubeadm init.
应用文档中指定的法兰绒Yaml:
Apply the flannel yaml specified on documentation:
kubectl apply -f https://raw.githubusercontent.com/coreos/flannel/2140ac876ef134e0ed5af15c65e414cf26827915/Documentation/kube-flannel.yml
To learn more about Flannel, check the Official Flannel Github
这篇关于在Kubernetes安装过程中绒布网络出现故障，请提出如何解决此问题的建议的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
