#!/bin/bash
# 在下载主机上需要安装docker

set -e

curdir=$(pwd)
OUT=$curdir/k8s-offline.tgz
TMP=$curdir/offline-cache

apt  install podman-docker
mkdir -p $TMP/bin $TMP/manifests $TMP/images $TMP/deps

echo "[1] 下载 依赖包"
cd $TMP/deps
apt install --download-only nfs-common rpcbind
cp /var/cache/apt/archives/*.deb .


echo "[2] 下载 Kubernetes 二进制 {{ kubernetes.version }}"
cd $TMP/bin
curl -LO https://dl.k8s.io/release/v{{ kubernetes.version }}/bin/linux/amd64/kubeadm
curl -LO https://dl.k8s.io/release/v{{ kubernetes.version }}/bin/linux/amd64/kubelet
curl -LO https://dl.k8s.io/release/v{{ kubernetes.version }}/bin/linux/amd64/kubectl
chmod +x kubeadm kubelet kubectl


cd $curdir
echo "[3] 下载镜像（kubeadm config images）"
$TMP/bin/kubeadm config images list --kubernetes-version {{ kubernetes.version }} > $TMP/images/images.txt
for img in $(cat $TMP/images/images.txt); do
    echo "Pull image: $img"
    docker pull $img
    docker save -o $TMP/images/$(echo $img | tr '/:' '_').tar $img
done

echo "[4] 复制 manifests"
cp -r ../manifests/* $TMP/manifests/

echo "[5] 打包离线资源"
tar czf $OUT offline-cache

echo "已生成离线包： $OUT"