centos安装kubectl和minikube工具

curl -LO https://storage.googleapis.com/kubernetes-release/release/`curl -s https://storage.googleapis.com/kubernetes-release/release/stable.txt`/bin/linux/amd64/kubectl
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curl -LO https://storage.googleapis.com/kubernetes-release/release/v1.17.0/bin/linux/amd64/kubectl
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chmod +x kubectl
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mv ./kubectl /usr/local/bin/kubectl
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kubectl version --client
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[virtualbox]
name=Oracle Linux / RHEL / CentOS-$releasever / $basearch - VirtualBox
baseurl=http://download.virtualbox.org/virtualbox/rpm/el/$releasever/$basearch
enabled=1
gpgcheck=1
repo_gpgcheck=1
gpgkey=https://www.virtualbox.org/download/oracle_vbox.asc
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yum install VirtualBox-6.0
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grep -E --color 'vmx|svm' /proc/cpuinfo
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curl -Lo minikube https://storage.googleapis.com/minikube/releases/latest/minikube-linux-amd64 && chmod +x minikube
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sudo mkdir -p /usr/local/bin/
sudo install minikube /usr/local/bin/
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minikube start --vm-driver=virtualbox
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minikube start --vm-driver=none
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minikube start --vm-driver=none
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minikube start --image-repository='registry.cn-hangzhou.aliyuncs.com/google_containers' --vm-driver=none
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X 开启 cluster 时出错: init failed. output: "-- stdout --\n[init] Using Kubernetes version: v1.17.3\n[preflight] Running pre-flight checks\n[preflight] Pulling images required for setting up a Kubernetes cluster\n[preflight] This might take a minute or two, depending on the speed of your internet connection\n[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'\n[kubelet-start] Writing kubelet environment file with flags to file \"/var/lib/kubelet/kubeadm-flags.env\"\n[kubelet-start] Writing kubelet configuration to file \"/var/lib/kubelet/config.yaml\"\n[kubelet-start] Starting the kubelet\n[certs] Using certificateDir folder \"/var/lib/minikube/certs\"\n[certs] Using existing ca certificate authority\n[certs] Using existing apiserver certificate and key on disk\n[certs] Generating \"apiserver-kubelet-client\" certificate and key\n[certs] Generating \"front-proxy-ca\" certificate and key\n[certs] Generating \"front-proxy-client\" certificate and key\n[certs] Generating \"etcd/ca\" certificate and key\n[certs] Generating \"etcd/server\" certificate and key\n[certs] etcd/server serving cert is signed for DNS names [localhost.localdomain localhost] and IPs [192.168.59.128 127.0.0.1 ::1]\n[certs] Generating \"etcd/peer\" certificate and key\n[certs] etcd/peer serving cert is signed for DNS names [localhost.localdomain localhost] and IPs [192.168.59.128 127.0.0.1 ::1]\n[certs] Generating \"etcd/healthcheck-client\" certificate and key\n[certs] Generating \"apiserver-etcd-client\" certificate and key\n[certs] Generating \"sa\" key and public key\n[kubeconfig] Using kubeconfig folder \"/etc/kubernetes\"\n[kubeconfig] Writing \"admin.conf\" kubeconfig file\n[kubeconfig] Writing \"kubelet.conf\" kubeconfig file\n[kubeconfig] Writing \"controller-manager.conf\" kubeconfig file\n[kubeconfig] Writing \"scheduler.conf\" kubeconfig file\n[control-plane] Using manifest folder \"/etc/kubernetes/manifests\"\n[control-plane] Creating static Pod manifest for \"kube-apiserver\"\n[control-plane] Creating static Pod manifest for \"kube-controller-manager\"\n[control-plane] Creating static Pod manifest for \"kube-scheduler\"\n[etcd] Creating static Pod manifest for local etcd in \"/etc/kubernetes/manifests\"\n[wait-control-plane] Waiting for the kubelet to boot up the control plane as static Pods from directory \"/etc/kubernetes/manifests\". This can take up to 4m0s\n[kubelet-check] Initial timeout of 40s passed.\n[kubelet-check] It seems like the kubelet isn't running or healthy.\n[kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10248/healthz' failed with error: Get http://localhost:10248/healthz: dial tcp [::1]:10248: connect: connection refused.\n\nUnfortunately, an error has occurred:\n\ttimed out waiting for the condition\n\nThis error is likely caused by:\n\t- The kubelet is not running\n\t- The kubelet is unhealthy due to a misconfiguration of the node in some way (required cgroups disabled)\n\nIf you are on a systemd-powered system, you can try to troubleshoot the error with the following commands:\n\t- 'systemctl status kubelet'\n\t- 'journalctl -xeu kubelet'\n\nAdditionally, a control plane component may have crashed or exited when started by the container runtime.\nTo troubleshoot, list all containers using your preferred container runtimes CLI, e.g. docker.\nHere is one example how you may list all Kubernetes containers running in docker:\n\t- 'docker ps -a | grep kube | grep -v pause'\n\tOnce you have found the failing container, you can inspect its logs with:\n\t- 'docker logs CONTAINERID'\n\n-- /stdout --\n** stderr ** \nW0227 14:11:35.372509   50864 validation.go:28] Cannot validate kube-proxy config - no validator is available\nW0227 14:11:35.372637   50864 validation.go:28] Cannot validate kubelet config - no validator is available\n\t[WARNING Firewalld]: firewalld is active, please ensure ports [8443 10250] are open or your cluster may not function correctly\n\t[WARNING FileExisting-socat]: socat not found in system path\nW0227 14:11:42.309644   50864 manifests.go:214] the default kube-apiserver authorization-mode is \"Node,RBAC\"; using \"Node,RBAC\"\nW0227 14:11:42.313619   50864 manifests.go:214] the default kube-apiserver authorization-mode is \"Node,RBAC\"; using \"Node,RBAC\"\nerror execution phase wait-control-plane: couldn't initialize a Kubernetes cluster\nTo see the stack trace of this error execute with --v=5 or higher\n\n** /stderr **": /bin/bash -c "sudo env PATH=/var/lib/minikube/binaries/v1.17.3:$PATH kubeadm init --config /var/tmp/minikube/kubeadm.yaml  --ignore-preflight-errors=DirAvailable--etc-kubernetes-manifests,DirAvailable--var-lib-minikube,DirAvailable--var-lib-minikube-etcd,FileAvailable--etc-kubernetes-manifests-kube-scheduler.yaml,FileAvailable--etc-kubernetes-manifests-kube-apiserver.yaml,FileAvailable--etc-kubernetes-manifests-kube-controller-manager.yaml,FileAvailable--etc-kubernetes-manifests-etcd.yaml,Port-10250,Swap,SystemVerification": exit status 1
stdout:
[init] Using Kubernetes version: v1.17.3
[preflight] Running pre-flight checks
[preflight] Pulling images required for setting up a Kubernetes cluster
[preflight] This might take a minute or two, depending on the speed of your internet connection
[preflight] You can also perform this action in beforehand using 'kubeadm config images pull'
[kubelet-start] Writing kubelet environment file with flags to file "/var/lib/kubelet/kubeadm-flags.env"
[kubelet-start] Writing kubelet configuration to file "/var/lib/kubelet/config.yaml"
[kubelet-start] Starting the kubelet
[certs] Using certificateDir folder "/var/lib/minikube/certs"
[certs] Using existing ca certificate authority
[certs] Using existing apiserver certificate and key on disk
[certs] Generating "apiserver-kubelet-client" certificate and key
[certs] Generating "front-proxy-ca" certificate and key
[certs] Generating "front-proxy-client" certificate and key
[certs] Generating "etcd/ca" certificate and key
[certs] Generating "etcd/server" certificate and key
[certs] etcd/server serving cert is signed for DNS names [localhost.localdomain localhost] and IPs [192.168.59.128 127.0.0.1 ::1]
[certs] Generating "etcd/peer" certificate and key
[certs] etcd/peer serving cert is signed for DNS names [localhost.localdomain localhost] and IPs [192.168.59.128 127.0.0.1 ::1]
[certs] Generating "etcd/healthcheck-client" certificate and key
[certs] Generating "apiserver-etcd-client" certificate and key
[certs] Generating "sa" key and public key
[kubeconfig] Using kubeconfig folder "/etc/kubernetes"
[kubeconfig] Writing "admin.conf" kubeconfig file
[kubeconfig] Writing "kubelet.conf" kubeconfig file
[kubeconfig] Writing "controller-manager.conf" kubeconfig file
[kubeconfig] Writing "scheduler.conf" kubeconfig file
[control-plane] Using manifest folder "/etc/kubernetes/manifests"
[control-plane] Creating static Pod manifest for "kube-apiserver"
[control-plane] Creating static Pod manifest for "kube-controller-manager"
[control-plane] Creating static Pod manifest for "kube-scheduler"
[etcd] Creating static Pod manifest for local etcd in "/etc/kubernetes/manifests"
[wait-control-plane] Waiting for the kubelet to boot up the control plane as static Pods from directory "/etc/kubernetes/manifests". This can take up to 4m0s
[kubelet-check] Initial timeout of 40s passed.
[kubelet-check] It seems like the kubelet isn't running or healthy.
[kubelet-check] The HTTP call equal to 'curl -sSL http://localhost:10248/healthz' failed with error: Get http://localhost:10248/healthz: dial tcp [::1]:10248: connect: connection refused.

Unfortunately, an error has occurred:
        timed out waiting for the condition

This error is likely caused by:
        - The kubelet is not running
        - The kubelet is unhealthy due to a misconfiguration of the node in some way (required cgroups disabled)

If you are on a systemd-powered system, you can try to troubleshoot the error with the following commands:
        - 'systemctl status kubelet'
        - 'journalctl -xeu kubelet'

Additionally, a control plane component may have crashed or exited when started by the container runtime.
To troubleshoot, list all containers using your preferred container runtimes CLI, e.g. docker.
Here is one example how you may list all Kubernetes containers running in docker:
        - 'docker ps -a | grep kube | grep -v pause'
        Once you have found the failing container, you can inspect its logs with:
        - 'docker logs CONTAINERID'
stderr:
W0227 14:11:35.372509   50864 validation.go:28] Cannot validate kube-proxy config - no validator is available
W0227 14:11:35.372637   50864 validation.go:28] Cannot validate kubelet config - no validator is available
        [WARNING Firewalld]: firewalld is active, please ensure ports [8443 10250] are open or your cluster may not function correctly
        [WARNING FileExisting-socat]: socat not found in system path
W0227 14:11:42.309644   50864 manifests.go:214] the default kube-apiserver authorization-mode is "Node,RBAC"; using "Node,RBAC"
W0227 14:11:42.313619   50864 manifests.go:214] the default kube-apiserver authorization-mode is "Node,RBAC"; using "Node,RBAC"
error execution phase wait-control-plane: couldn't initialize a Kubernetes cluster
To see the stack trace of this error execute with --v=5 or higher

* 
* 由于出错 minikube 正在退出。如果以上信息没有帮助，请提交问题反馈：
  - https://github.com/kubernetes/minikube/issues/new/choose
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error execution phase wait-control-plane: couldn't initialize a Kubernetes cluster
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