kubeadm init

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With errors

 
 kubeadm init --pod-network-cidr=10.244.0.0/16
 W0419 17:17:35.020389   29884 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io 
 kubeproxy.config.k8s.io]
 [init] Using Kubernetes version: v1.18.2
 [preflight] Running pre-flight checks
 [preflight] WARNING: Couldn't create the interface used for talking to the container runtime: docker is required for container runtime: exec: "docker": 
 executable file not found in $PATH
	[WARNING FileExisting-socat]: socat not found in system path
	[WARNING Service-Kubelet]: kubelet service is not enabled, please run 'systemctl enable kubelet.service'
 error execution phase preflight: [preflight] Some fatal errors occurred:
	[ERROR NumCPU]: the number of available CPUs 1 is less than the required 2
	[ERROR FileExisting-crictl]: crictl not found in system path
	[ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does not exist
	[ERROR FileExisting-conntrack]: conntrack not found in system path
	[ERROR KubeletVersion]: couldn't get kubelet version: cannot execute 'kubelet --version': executable file not found in $PATH
 [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


[ERROR NumCPU]: the number of available CPUs 1 is less than the required 2


kubeadm init --pod-network-cidr=10.244.0.0/16 --ignore-preflight-errors=All

With errors: docker not installed

kubeadm init
 W0823 18:18:03.055636   30827 configset.go:202] WARNING: kubeadm cannot validate component configs for API groups [kubelet.config.k8s.io kubeproxy.config.k8s.io]
 [init] Using Kubernetes version: v1.18.8
 [preflight] Running pre-flight checks
 [preflight] WARNING: Couldn't create the interface used for talking to the container runtime: docker is required for 
 container runtime: exec: "docker": executable file not found in $PATH
 	[WARNING FileExisting-socat]: socat not found in system path 
	[WARNING Service-Kubelet]: kubelet service is not enabled, please run 'systemctl enable kubelet.service'
 error execution phase preflight: [preflight] Some fatal errors occurred:
	[ERROR NumCPU]: the number of available CPUs 1 is less than the required 2
	[ERROR FileExisting-crictl]: crictl not found in system path
	[ERROR FileContent--proc-sys-net-bridge-bridge-nf-call-iptables]: /proc/sys/net/bridge/bridge-nf-call-iptables does 
 not exist
	[ERROR FileContent--proc-sys-net-ipv4-ip_forward]: /proc/sys/net/ipv4/ip_forward contents are not set to 1
	[ERROR FileExisting-conntrack]: conntrack not found in system path
 [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

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