k8s安装网络插件镜像下载不了问题
下面是本人在帮好友安装k8s过程中在安装网络插件这里碰到的问题
使用kubectl apply -f kube-flannel.yml安装flannel网络插件
安装完之后是要等个一阵子的，但是等了十分钟后发现节点状态还是为Noready
通过journalctl -f -u kubelet 查看kubelet日志发现报错
systemctl status kubelet 查看报错如下
# systemctl status kubelet
* kubelet.service - kubelet: The Kubernetes Node Agent
Loaded: loaded (/usr/lib/systemd/system/kubelet.service; disabled; vendor preset: disabled)
Drop-In: /usr/lib/systemd/system/kubelet.service.d
`-10-kubeadm.conf
Active: active (running) since 2022-11-04 19:53:22 CST; 7s ago
Docs: https://kubernetes.io/docs/
Main PID: 22607 (kubelet)
Tasks: 14
Memory: 32.7M
CGroup: /system.slice/kubelet.service
`-22607 /usr/bin/kubelet --bootstrap-kubeconfig=/etc/kubernetes/bootstrap-kubelet.conf --kubeconfig=/etc/kubernetes/kubelet.conf --config=/var/lib/kubelet/config.yaml --network-plugin=cni...
22607 kubelet.go:1742] "Failed creating a mirror pod for" err="pods \"kube-apiserver-master\" already exists" pod="kube-...server-master"
22607 kubelet.go:1742] "Failed creating a mirror pod for" err="pods \"kube-controller-manager-master\" already exists" p...anager-master"
22607 request.go:665] Waited for 1.041822653s due to client-side throttling, not priority and fairness, request: POST:ht...be-system/pods
22607 kubelet.go:1742] "Failed creating a mirror pod for" err="pods \"kube-scheduler-master\" already exists" pod="kube-...eduler-master"
22607 configmap.go:200] Couldn't get configMap kube-system/kube-proxy: failed to sync configmap cache: timed out waiting... the condition
22607 nestedpendingoperations.go:335] Operation for "{volumeName:kubernetes.io/configmap/6839e60e-9e18-4b9a-90e5-bdbc860...215 +0800 CST
22607 configmap.go:200] Couldn't get configMap kube-flannel/kube-flannel-cfg: failed to sync configmap cache: timed out ... the condition
22607 nestedpendingoperations.go:335] Operation for "{volumeName:kubernetes.io/configmap/a075c2d0-52d0-4f92-a2db-8b79b5e...7888 +0800 CST
22607 cni.go:240] "Unable to update cni config" err="no networks found in /etc/cni/net.d"
22607 kubelet.go:2391] "Container runtime network not ready" networkReady="NetworkReady=false reason:NetworkPluginNotRea...uninitialized"
Hint: Some lines were ellipsized, use -l to show in full.
还是说报没有安装网络插件的问题。只能说明网络插件安装失败了
查看kube-flannel pod节点状态 Terminating
[root@master k8s]# kubectl get pod -n kube-flannel
NAME READY STATUS RESTARTS AGE
kube-flannel-ds-v8xw5 0/1 Terminating 0 33m
查看 kube-flannel 启动过程 看Events事件
[root@master k8s]# kubectl describe pod -n kube-flannel
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 42s default-scheduler Successfully assigned kube-flannel/kube-flannel-ds-z45kj to master
Normal Pulled 42s kubelet Container image "docker.io/rancher/mirrored-flannelcni-flannel-cni-plugin:v1.1.0" already present on machine
Normal Created 42s kubelet Created container install-cni-plugin
Normal Started 42s kubelet Started container install-cni-plugin
Normal Pulling 41s kubelet Pulling image "docker.io/rancher/mirrored-flannelcni-flannel:v0.20.0"
发现在 pulling image “docker.io/rancher/mirrored-flannelcni-flannel:v0.20.0” 这个地方一直卡着。
原因是这是一个国外的镜像访问不了，有点慢。想办法替换其它可以下载的镜像
搜索一下
[root@master k8s]# docker search flannel
NAME DESCRIPTION STARS OFFICIAL AUTOMATED
jmgao1983/flannel from quay.io/coreos/flannel 10 [OK]
lizhenliang/flannel 4
easzlab/flannel from quay.io/coreos/flannel 4
sigwindowstools/flannel 3
flannelcni/flannel primary images from https://github.com/flann… 2
winjay/flannel 1
flannelcni/flannel-cni-plugin Flannel CNI plugin images as built from: htt… 1
jasonbrooks/flannel flannel system container 1 [OK]
选择拉取一个 jmgao1983/flannel 与 lizhenliang/flannel 都行
docker pull jmgao1983/flannel
在线编辑 kube-flannel.yml
kubectl edit -f kube-flannel.yml
initContainers:
- name: install-cni-plugin
#image: flannelcni/flannel-cni-plugin:v1.1.0 for ppc64le and mips64le (dockerhub limitations may apply)
image: docker.io/rancher/mirrored-flannelcni-flannel-cni-plugin:v1.1.0
command:
- cp
args:
- -f
- /flannel
- /opt/cni/bin/flannel
volumeMounts:
- name: cni-plugin
mountPath: /opt/cni/bin
- name: install-cni
#image: flannelcni/flannel:v0.20.0 for ppc64le and mips64le (dockerhub limitations may apply)
image: jmgao1983/flannel
command:
- cp
args:
- -f
- /etc/kube-flannel/cni-conf.json
- /etc/cni/net.d/10-flannel.conflist
volumeMounts:
- name: cni
mountPath: /etc/cni/net.d
- name: flannel-cfg
mountPath: /etc/kube-flannel/
containers:
- name: kube-flannel
#image: flannelcni/flannel:v0.20.0 for ppc64le and mips64le (dockerhub limitations may apply)
image: jmgao1983/flannel
将 docker.io/rancher/mirrored-flannelcni-flannel:v0.20.0 换成 jmgao1983/flannel
再次查看
kubectl describe pod -n kube-flannel
看到 Started container kube-flannel 表示启动成功
Events:
Type Reason Age From Message
---- ------ ---- ---- -------
Normal Scheduled 42s default-scheduler Successfully assigned kube-flannel/kube-flannel-ds-lg6th to master
Normal Pulled 42s kubelet Container image "docker.io/rancher/mirrored-flannelcni-flannel-cni-plugin:v1.1.0" already present on machine
Normal Created 42s kubelet Created container install-cni-plugin
Normal Started 42s kubelet Started container install-cni-plugin
Normal Pulling 41s kubelet Pulling image "jmgao1983/flannel"
Normal Pulled 24s kubelet Successfully pulled image "jmgao1983/flannel" in 17.43224951s
Normal Created 24s kubelet Created container install-cni
Normal Started 24s kubelet Started container install-cni
Normal Pulling 23s kubelet Pulling image "jmgao1983/flannel"
Normal Pulled 2s kubelet Successfully pulled image "jmgao1983/flannel" in 20.788409144s
Normal Created 2s kubelet Created container kube-flannel
Normal Started 2s kubelet Started container kube-flannel
再次查看nodes状态
[root@master k8s]# kubectl get pod -n kube-flannel
NAME READY STATUS RESTARTS AGE
kube-flannel-ds-lg6th 1/1 Running 0 11m
[root@master k8s]# kubectl get nodes
NAME STATUS ROLES AGE VERSION
master Ready control-plane,master 88m v1.23.9