无法在CentOS 7上安装Kubernetes集群

时间：2017-11-10 06:05:03

标签： centos kubernetes centos7 kubeadm kubelet

按照本指南安装Kubernetes：

https://www.linuxtechi.com/install-kubernetes-1-7-centos7-rhel7/

当进入$ kubeadm init --skip-preflight-checks [kubeadm] WARNING: kubeadm is in beta, please do not use it for production clusters. [init] Using Kubernetes version: v1.8.3 [init] Using Authorization modes: [Node RBAC] [preflight] Skipping pre-flight checks [kubeadm] WARNING: starting in 1.8, tokens expire after 24 hours by default (if you require a non-expiring token use --token-ttl 0) [certificates] Using the existing ca certificate and key. [certificates] Using the existing apiserver certificate and key. [certificates] Using the existing apiserver-kubelet-client certificate and key. [certificates] Using the existing sa key. [certificates] Using the existing front-proxy-ca certificate and key. [certificates] Using the existing front-proxy-client certificate and key. [certificates] Valid certificates and keys now exist in "/etc/kubernetes/pki" [kubeconfig] Using existing up-to-date KubeConfig file: "admin.conf" [kubeconfig] Using existing up-to-date KubeConfig file: "kubelet.conf" [kubeconfig] Using existing up-to-date KubeConfig file: "controller-manager.conf" [kubeconfig] Using existing up-to-date KubeConfig file: "scheduler.conf" [controlplane] Wrote Static Pod manifest for component kube-apiserver to "/etc/kubernetes/manifests/kube-apiserver.yaml" [controlplane] Wrote Static Pod manifest for component kube-controller-manager to "/etc/kubernetes/manifests/kube-controller-manager.yaml" [controlplane] Wrote Static Pod manifest for component kube-scheduler to "/etc/kubernetes/manifests/kube-scheduler.yaml" [etcd] Wrote Static Pod manifest for a local etcd instance to "/etc/kubernetes/manifests/etcd.yaml" [init] Waiting for the kubelet to boot up the control plane as Static Pods from directory "/etc/kubernetes/manifests" [init] This often takes around a minute; or longer if the control plane images have to be pulled. [kubelet-check] It seems like the kubelet isn't running or healthy. [kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10255/healthz' failed with error: Get http://localhost:10255/healthz: dial tcp [::1]:10255: getsockopt: connection refused. [kubelet-check] It seems like the kubelet isn't running or healthy. [kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10255/healthz' failed with error: Get http://localhost:10255/healthz: dial tcp [::1]:10255: getsockopt: connection refused. [kubelet-check] It seems like the kubelet isn't running or healthy. [kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10255/healthz' failed with error: Get http://localhost:10255/healthz: dial tcp [::1]:10255: getsockopt: connection refused. [kubelet-check] It seems like the kubelet isn't running or healthy. [kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10255/healthz/syncloop' failed with error: Get http://localhost:10255/healthz/syncloop: dial tcp [::1]:10255: getsockopt: connection refused. [kubelet-check] It seems like the kubelet isn't running or healthy. [kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10255/healthz/syncloop' failed with error: Get http://localhost:10255/healthz/syncloop: dial tcp [::1]:10255: getsockopt: connection refused. [kubelet-check] It seems like the kubelet isn't running or healthy. [kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10255/healthz/syncloop' failed with error: Get http://localhost:10255/healthz/syncloop: dial tcp [::1]:10255: getsockopt: connection refused. [kubelet-check] It seems like the kubelet isn't running or healthy. [kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10255/healthz' failed with error: Get http://localhost:10255/healthz: dial tcp [::1]:10255: getsockopt: connection refused. [kubelet-check] It seems like the kubelet isn't running or healthy. [kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10255/healthz/syncloop' failed with error: Get http://localhost:10255/healthz/syncloop: dial tcp [::1]:10255: getsockopt: connection refused. [kubelet-check] It seems like the kubelet isn't running or healthy. [kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10255/healthz' failed with error: Get http://localhost:10255/healthz: dial tcp [::1]:10255: getsockopt: connection refused. Unfortunately, an error has occurred: timed out waiting for the condition This error is likely caused by that: - The kubelet is not running - The kubelet is unhealthy due to a misconfiguration of the node in some way (required cgroups disabled) - There is no internet connection; so the kubelet can't pull the following control plane images: - gcr.io/google_containers/kube-apiserver-amd64:v1.8.3 - gcr.io/google_containers/kube-controller-manager-amd64:v1.8.3 - gcr.io/google_containers/kube-scheduler-amd64:v1.8.3 You can troubleshoot this for example with the following commands if you're on a systemd-powered system: - 'systemctl status kubelet' - 'journalctl -xeu kubelet' couldn't initialize a Kubernetes cluster 步时，出现错误：

systemctl status kubelet

选中● kubelet.service - kubelet: The Kubernetes Node Agent Loaded: loaded (/etc/systemd/system/kubelet.service; enabled; vendor preset: disabled) Drop-In: /etc/systemd/system/kubelet.service.d └─10-kubeadm.conf Active: activating (auto-restart) (Result: exit-code) since Fri 2017-11-10 05:34:12 UTC; 6s ago Docs: http://kubernetes.io/docs/ Process: 29927 ExecStart=/usr/bin/kubelet $KUBELET_KUBECONFIG_ARGS $KUBELET_SYSTEM_PODS_ARGS $KUBELET_NETWORK_ARGS $KUBELET_DNS_ARGS $KUBELET_AUTHZ_ARGS $KUBELET_CADVISOR_ARGS $KUBELET_CGROUP_ARGS $KUBELET_CERTIFICATE_ARGS $KUBELET_EXTRA_ARGS (code=exited, status=1/FAILURE) Main PID: 29927 (code=exited, status=1/FAILURE) Nov 10 05:34:12 master systemd[1]: kubelet.service: main process exited, code=exited, status=1/FAILURE Nov 10 05:34:12 master systemd[1]: Unit kubelet.service entered failed state. Nov 10 05:34:12 master systemd[1]: kubelet.service failed. 时：

journalctl -xeu kubelet

选中Nov 10 05:35:15 master systemd[1]: kubelet.service holdoff time over, scheduling restart. Nov 10 05:35:15 master systemd[1]: Started kubelet: The Kubernetes Node Agent. -- Subject: Unit kubelet.service has finished start-up -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit kubelet.service has finished starting up. -- -- The start-up result is done. Nov 10 05:35:15 master systemd[1]: Starting kubelet: The Kubernetes Node Agent... -- Subject: Unit kubelet.service has begun start-up -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit kubelet.service has begun starting up. Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.364837 30174 feature_gate.go:156] feature gates: map[] Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.364917 30174 controller.go:114] kubelet config controller: starting controller Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.364921 30174 controller.go:118] kubelet config controller: validating combination of defaults and flags Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.375149 30174 client.go:75] Connecting to docker on unix:///var/run/docker.sock Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.375226 30174 client.go:95] Start docker client with request timeout=2m0s Nov 10 05:35:15 master kubelet[30174]: W1110 05:35:15.377200 30174 cni.go:196] Unable to update cni config: No networks found in /etc/cni/net.d Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.382890 30174 feature_gate.go:156] feature gates: map[] Nov 10 05:35:15 master kubelet[30174]: W1110 05:35:15.383011 30174 server.go:289] --cloud-provider=auto-detect is deprecated. The desired cloud provider should be set explicitly Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.408678 30174 certificate_manager.go:361] Requesting new certificate. Nov 10 05:35:15 master kubelet[30174]: E1110 05:35:15.409287 30174 certificate_manager.go:284] Failed while requesting a signed certificate from the master: cannot create certificate signing request: Post https://10.0.2.15:6443/apis/certificates.k8s.io/v1beta1/certifica Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.411480 30174 manager.go:149] cAdvisor running in container: "/sys/fs/cgroup/cpu,cpuacct/system.slice/kubelet.service" Nov 10 05:35:15 master kubelet[30174]: W1110 05:35:15.425796 30174 manager.go:157] unable to connect to Rkt api service: rkt: cannot tcp Dial rkt api service: dial tcp [::1]:15441: getsockopt: connection refused Nov 10 05:35:15 master kubelet[30174]: W1110 05:35:15.426006 30174 manager.go:166] unable to connect to CRI-O api service: Get http://%2Fvar%2Frun%2Fcrio.sock/info: dial unix /var/run/crio.sock: connect: no such file or directory Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.440364 30174 fs.go:139] Filesystem UUIDs: map[4537d533-47ff-463c-bffc-7ce294d9c93a:/dev/dm-1 598bbfb9-027e-4f52-a5b3-c4d3d1fbc2b8:/dev/dm-0 8ffa0ee9-e1a8-4c03-acce-b65b342c6935:/dev/sda2] Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.440395 30174 fs.go:140] Filesystem partitions: map[tmpfs:{mountpoint:/dev/shm major:0 minor:17 fsType:tmpfs blockSize:0} /dev/mapper/VolGroup00-LogVol00:{mountpoint:/var/lib/docker/overlay major:253 minor:0 fsType:xf Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.441589 30174 manager.go:216] Machine: {NumCores:1 CpuFrequency:3100000 MemoryCapacity:1040621568 HugePages:[{PageSize:2048 NumPages:0}] MachineID:a0b78b0170c248288e172d5196d59063 SystemUUID:A0B78B01-70C2-4828-8E17-2D Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.446544 30174 manager.go:222] Version: {KernelVersion:3.10.0-693.5.2.el7.x86_64 ContainerOsVersion:CentOS Linux 7 (Core) DockerVersion:17.09.0-ce DockerAPIVersion:1.32 CadvisorVersion: CadvisorRevision:} Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.447201 30174 server.go:422] --cgroups-per-qos enabled, but --cgroup-root was not specified. defaulting to / Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.451260 30174 container_manager_linux.go:252] container manager verified user specified cgroup-root exists: / Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.451293 30174 container_manager_linux.go:257] Creating Container Manager object based on Node Config: {RuntimeCgroupsName: SystemCgroupsName: KubeletCgroupsName: ContainerRuntime:docker CgroupsPerQOS:true CgroupRoot:/ Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.451403 30174 container_manager_linux.go:288] Creating device plugin handler: false Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.451616 30174 kubelet.go:273] Adding manifest file: /etc/kubernetes/manifests Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.451710 30174 kubelet.go:283] Watching apiserver Nov 10 05:35:15 master kubelet[30174]: E1110 05:35:15.480061 30174 reflector.go:205] k8s.io/kubernetes/pkg/kubelet/kubelet.go:422: Failed to list *v1.Node: Get https://10.0.2.15:6443/api/v1/nodes?fieldSelector=metadata.name%3Dmaster&resourceVersion=0: dial tcp 10.0.2.15 Nov 10 05:35:15 master kubelet[30174]: E1110 05:35:15.500829 30174 reflector.go:205] k8s.io/kubernetes/pkg/kubelet/kubelet.go:413: Failed to list *v1.Service: Get https://10.0.2.15:6443/api/v1/services?resourceVersion=0: dial tcp 10.0.2.15:6443: getsockopt: connection r Nov 10 05:35:15 master kubelet[30174]: E1110 05:35:15.500917 30174 reflector.go:205] k8s.io/kubernetes/pkg/kubelet/config/apiserver.go:47: Failed to list *v1.Pod: Get https://10.0.2.15:6443/api/v1/pods?fieldSelector=spec.nodeName%3Dmaster&resourceVersion=0: dial tcp 10. Nov 10 05:35:15 master kubelet[30174]: W1110 05:35:15.541334 30174 kubelet_network.go:69] Hairpin mode set to "promiscuous-bridge" but kubenet is not enabled, falling back to "hairpin-veth" Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.541369 30174 kubelet.go:517] Hairpin mode set to "hairpin-veth" Nov 10 05:35:15 master kubelet[30174]: W1110 05:35:15.541616 30174 cni.go:196] Unable to update cni config: No networks found in /etc/cni/net.d Nov 10 05:35:15 master kubelet[30174]: W1110 05:35:15.548689 30174 cni.go:196] Unable to update cni config: No networks found in /etc/cni/net.d Nov 10 05:35:15 master kubelet[30174]: W1110 05:35:15.553143 30174 cni.go:196] Unable to update cni config: No networks found in /etc/cni/net.d Nov 10 05:35:15 master kubelet[30174]: I1110 05:35:15.553164 30174 docker_service.go:207] Docker cri networking managed by cni Nov 10 05:35:15 master kubelet[30174]: error: failed to run Kubelet: failed to create kubelet: misconfiguration: kubelet cgroup driver: "systemd" is different from docker cgroup driver: "cgroupfs" Nov 10 05:35:15 master systemd[1]: kubelet.service: main process exited, code=exited, status=1/FAILURE Nov 10 05:35:15 master systemd[1]: Unit kubelet.service entered failed state. Nov 10 05:35:15 master systemd[1]: kubelet.service failed. 时：

x=imread('1_s.tif');%open orthoimage%

x1=uint8((1/3)*(double(x(:,:,1))+double(x(:,:,2))+double(x(:,:,3))));%create gray scale image%

a=im2bw(x1,0.501);
imshow(a);
b=bwareaopen(a,40);
imshow(b);
se=strel('line' ,1,90);
c=imerode(b,se);
figure,imshow(c);

[L]= bwlabel(c);

 s=regionprops(L,'Centroid','Eccentricity');
 centroids = cat(1, s.Centroid);
 xc=find([s.Eccentricity]>0.979);
  qq=ismember(L,xc);
   imshow(qq);

1 个答案:

答案 0 :(得分：2)

日志db.collection('collection name').findAndModify( { "_id": ObjectId(req.body.id) }, [], { $set: { "delete": req.body.delete } }, { new: true }, function (err, data123) { if (err) throw err; db.collection('collection name').findAndModify( { "_id": ObjectId(req.body.error_id) }, [], { $set: { "read": true } }, { new: true }, function (err, data1234) { if (err) throw err; res.write(JSON.stringify(data1234.value)); res.end(); db.close(); }); });

中的关键点
  

确保kubelet使用的cgroup驱动程序与Docker使用的驱动程序相同。

     

为确保兼容性，您可以更新Docker，或确保将from azure.common.credentials import ServicePrincipalCredentials from azure.mgmt.resource.resources import ResourceManagementClient from azure.mgmt.compute import ComputeManagementClient from azure.mgmt.network import NetworkManagementClient subscription_id = '' credentials = ServicePrincipalCredentials( client_id = '', secret = '', tenant = '', ) resource_client = ResourceManagementClient(credentials,subscription_id) resource_client.providers.register('Microsoft.Batch') def get_resources(): for rg in resource_client.resource_groups.list(): for item in resource_client.resource_groups.list_resources(rg.name): print "%s,%s,%s,%s,"%(item.name,item.type,item.location,rg.name) get_resources() kubelet标志设置为与Docker相同的值（例如cgroupfs）

     

- Installing kubeadm

更新Docker以使用misconfiguration: kubelet cgroup driver: "systemd" is different from docker cgroup driver: "cgroupfs" 

--cgroup-driver

重启docker service。

或更新kubelet以使用systemd 

cat << EOF > /etc/docker/daemon.json
{
  "exec-opts": ["native.cgroupdriver=systemd"]
}
EOF

然后按cgroupfs重新启动kubelet。

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