Debian 11 kubernetes

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[WARNING SystemVerification]: missing optional cgroups: blkio error execution phase preflight: [preflight] Some fatal errors occurred:

    [ERROR Port-6443]: Port 6443 is in use

    [ERROR Port-10259]: Port 10259 is in use

    [ERROR Port-10257]: Port 10257 is in use

    [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 Port-10250]: Port 10250 is in use

    [ERROR Port-2379]: Port 2379 is in use

    [ERROR Port-2380]: Port 2380 is in use

    [ERROR DirAvailable--var-lib-etcd]: /var/lib/etcd is not empty

[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

kubernetes
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