新增learn-kubernetes（https://github.com/yyong-brs/learn-kubernetes）相关文件

learn/learn-kubernetes-master/kiamol/ch01/vagrant/README.md

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+# Using Vagrant to run KinD
+
+This configures a virtual machine which installs Docker and KinD.
+
+## Pre-requisites
+
+You need to install [Vagrant](https://www.vagrantup.com) and use one of the supported VM providers:
+
+* Hyper-V on Windows
+* VirtualBox on Linux, Windows or Mac
+
+> Pull requests to add support for other providers is welcome :)
+
+## Usage
+
+From this directory run:
+
+```
+vagrant up
+```
+
+The first time you run this it will take a while to download the base VM, but subsequent runs will be fast.
+
+Connect to the VM:
+
+```
+vagrant ssh
+```
+
+The VM mounts the `kiamol` folder on your host into the VM, so you can get to all the source for the book from here:
+
+```
+cd /kiamol
+```
+
+## Teardown
+
+Use one of these options:
+
+* `vagrant suspend` to suspend the VM which keeps your current state
+* `vagrant halt` to stop the VM
+* `vagrant destroy` to remove the VM altogether

learn/learn-kubernetes-master/kiamol/ch01/vagrant/Vagrantfile

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+Vagrant.configure("2") do |config|
+  
+  config.vm.define "kiamol" do |kiamol|
+    kiamol.vm.box = "bento/ubuntu-16.04"    # 20.04 uses resolved which messes with Kind's DNS
+    kiamol.vm.hostname = "kiamol"
+    kiamol.vm.network "private_network", type: "dhcp"
+
+    kiamol.vm.provision "shell", path: "setup.sh"
+    kiamol.vm.provision "shell", path: "kiamol.sh", privileged: false
+
+    kiamol.vm.synced_folder "../..", "/kiamol"
+
+    kiamol.vm.provider :hyperv do |v|
+      v.vmname = "kiamol"
+      v.maxmemory = 3000
+      v.cpus = 2
+    end
+
+    kiamol.vm.provider :virtualbox do |v|
+      v.name = "kiamol"
+      v.memory = 3000
+      v.cpus = 2
+    end
+  end
+
+end

learn/learn-kubernetes-master/kiamol/ch01/vagrant/kiamol.sh

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+#!/bin/bash
+
+echo '---------'
+echo "kiamol.sh as: $(whoami)"
+echo '---------'
+
+# create the cluster
+mkdir -p ~/.kube
+sudo kind create cluster --image kindest/node:v1.18.8 --name kiamol --kubeconfig /home/vagrant/.kube/config
+sudo chown vagrant ~/.kube/config
+
+# set MOTD
+sudo sh -c 'echo "\n** Learn Kubernetes in a Month of Lunches **\n**  https://kiamol.net  **\nSource is in /kiamol\nIf Kubectl does not respond, start the Kind container with:\n  docker start kiamol-control-plane\n" > /etc/motd'
+
+# add aliases:
+echo "alias k='kubectl'" >> ~/.bashrc
+echo "alias d='docker'" >> ~/.bashrc

learn/learn-kubernetes-master/kiamol/ch01/vagrant/setup.sh

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+#!/bin/bash
+
+echo '--------'
+echo "setup.sh as: $(whoami)"
+echo '--------'
+
+DOCKER_VERSION="5:19.03.12~3-0~ubuntu-xenial"
+KUBERNETES_VERSION="1.18.8-00"
+hostname -I | awk '{print $NF}' > /tmp/ip.txt
+
+# turn off swap - for the Kubelet
+swapoff -a 
+sed -ri '/\sswap\s/s/^#?/#/' /etc/fstab
+
+# install Docker
+apt-get update
+apt-get install -y \
+    apt-transport-https \
+    ca-certificates \
+    curl \
+    gnupg-agent \
+    software-properties-common
+
+curl -fsSL https://download.docker.com/linux/ubuntu/gpg | apt-key add -
+add-apt-repository \
+   "deb [arch=amd64] https://download.docker.com/linux/ubuntu \
+   $(lsb_release -cs) \
+   stable"
+
+apt-get update
+apt-get install -y \
+    docker-ce=$DOCKER_VERSION \
+    docker-ce-cli=$DOCKER_VERSION \
+    containerd.io
+
+# use Docker & Kind without sudo:
+sudo usermod -aG docker vagrant
+
+# install Kubectl
+curl -s https://packages.cloud.google.com/apt/doc/apt-key.gpg | apt-key add -
+add-apt-repository "deb https://apt.kubernetes.io/ kubernetes-xenial main"
+
+apt-get update
+apt-get install -y \
+    kubectl=$KUBERNETES_VERSION
+
+# install Helm
+curl https://raw.githubusercontent.com/helm/helm/master/scripts/get-helm-3 | bash
+
+# install Kind
+curl -Lo ./kind https://kind.sigs.k8s.io/dl/v0.8.1/kind-$(uname)-amd64
+chmod +x ./kind
+mv ./kind /usr/local/bin/kind