kubeadm初始化kubernetes报错以及解决 _Kubernetes

【kubeadm初始化kubernetes报错以及解决】古人学问无遗力，少壮工夫老始成。这篇文章主要讲述kubeadm初始化kubernetes报错以及解决相关的知识，希望能为你提供帮助。
1、报错

[root@master ~]# kubeadm init --kubernetes-version=v1.21.0 --pod-network-cidr=172.16.0.0/16 --service-cidr=172.18.0.0/16 [init] Using Kubernetes version: v1.21.0 [preflight] Running pre-flight checks [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/ [WARNING Hostname]: hostname "master" could not be reached [WARNING Hostname]: hostname "master": lookup master on 172.16.0.2:53: no such host error execution phase preflight: [preflight] Some fatal errors occurred: [ERROR NumCPU]: the number of available CPUs 1 is less than the required 2 [ERROR Swap]: running with swap on is not supported. Please disable swap [ERROR KubeletVersion]: the kubelet version is higher than the control plane version. This is not a supported version skew and may lead to a malfunctional cluster. Kubelet version: "1.22.2" Control plane version: "1.21.0" [preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...` To see the stack trace of this error execute with --v=5 or higher

2、解决方法

错误一： [WARNING IsDockerSystemdCheck]: detected "cgroupfs" as the Docker cgroup driver. The recommended driver is "systemd". Please follow the guide at https://kubernetes.io/docs/setup/cri/ 解决方法："exec-opts": ["native.cgroupdriver=systemd"] 加入下面一行 [root@master ~]# vim /etc/docker/daemon.json "registry-mirrors": ["https://q2hy3fzi.mirror.aliyuncs.com"], "exec-opts": ["native.cgroupdriver=systemd"] }错误二： [WARNING Hostname]: hostname "master" could not be reached 解决方法：所有节点修改host文件 [root@master ~]# vim /etc/hosts 127.0.0.1localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1localhost localhost.localdomain localhost6 localhost6.localdomain6 172.16.128.12master 172.16.128.0node1 172.16.128.13node2错误三： [ERROR NumCPU]: the number of available CPUs 1 is less than the required 2 解决方法：其一：虚拟机话，可以提升虚拟机的cpu资源其二：忽视这条告警错误，加上 --ignore-preflight-errors=all 参数即可。错误四： [ERROR Swap]: running with swap on is not supported. Please disable swap 解决方法：关闭swap并且修改fstab文件 [root@master ~]# swapoff -a [root@master ~]# vim /etc/fstab # /etc/fstab # Created by anaconda on Thu Sep 23 17:45:45 2021 # Accessible filesystems, by reference, are maintained under \'/dev/disk\' # See man pages fstab(5), findfs(8), mount(8) and/or blkid(8) for more info # UUID=be2920b0-9460-45c5-ab99-25f875fe44ce /xfsdefaults0 0 UUID=5b946178-29ba-4e71-80fa-168971ee2d3f /bootxfsdefaults0 0 UUID=ebbb0118-c740-4025-87a2-ed4e073d2b03 /dataext4defaults1 2 #UUID=fcb0ec3c-731d-44a6-86dd-ae284fe407ac swapswapdefaults0 0错误五： [ERROR KubeletVersion]: the kubelet version is higher than the control plane version. 解决方法：忽略这条报错，这是因为kubelet版本太新导致的 [root@master ~]# vim /etc/sysconfig/kubelet KUBELET_EXTRA_ARGS="--fail-swap-on=false"

3、kubeadm初始化kubernetes

[root@master ~]# kubeadm init --kubernetes-version=v1.21.0 --pod-network-cidr=172.16.0.0/16 --service-cidr=172.18.0.0/16 --ignore-preflight-errors=all