调用 kubeadm init 时，kubeadm 无法初始化

Question

我是 kubernetes 的新手并试图配置 kubernetes 主节点，我已经安装了 kubeadm、kubectl 和 kubelet

https://kubernetes.io/docs/setup/independent/create-cluster-kubeadm/

但是当我尝试通过键入启动 kubeadm 时kubeadm init，它给了我以下错误

[init] Using Kubernetes version: v1.14.0
[preflight] Running pre-flight checks
        [WARNING Firewalld]: no supported init system detected, skipping checking for services
        [WARNING Service-Docker]: no supported init system detected, skipping checking for services
        [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 Service-Kubelet]: no supported init system detected, skipping checking for services
error execution phase preflight: [preflight] Some fatal errors occurred:
        [ERROR FileAvailable--etc-kubernetes-manifests-kube-apiserver.yaml]: /etc/kubernetes/manifests/kube-apiserver.yaml already exists
        [ERROR FileAvailable--etc-kubernetes-manifests-kube-controller-manager.yaml]: /etc/kubernetes/manifests/kube-controller-manager.yaml already exists
        [ERROR FileAvailable--etc-kubernetes-manifests-kube-scheduler.yaml]: /etc/kubernetes/manifests/kube-scheduler.yaml already exists
        [ERROR FileAvailable--etc-kubernetes-manifests-etcd.yaml]: /etc/kubernetes/manifests/etcd.yaml already exists
        [ERROR FileContent--proc-sys-net-ipv4-ip_forward]: /proc/sys/net/ipv4/ip_forward contents are not set to 1
[preflight] If you know what you are doing, you can make a check non-fatal with `--ignore-preflight-errors=...`

Answer 1

系统上似乎存在陈旧数据。要删除该数据 (/etc/kubernetes) 目录，请运行：

kubeadm reset

现在您需要通过以下命令将 ip_forward 内容设置为 1：

echo 1 > /proc/sys/net/ipv4/ip_forward

这应该可以解决您的问题。