#!/bin/bash
#--------------------------------------------------
# This script is used for: 
# 1. to download the scripts/binaries/images needed for installing a k8s cluster with kubeasz
# 2. to run kubeasz in a container (recommended)
# @author:   gjmzj
# @usage:    ./ezdown
# @repo:     https://github.com/easzlab/kubeasz
#--------------------------------------------------
set -o nounset
set -o errexit
set -o pipefail
#set -o xtrace

# default settings, can be overridden by cmd line options, see usage
DOCKER_VER=24.0.5
KUBEASZ_VER=3.6.2
K8S_BIN_VER=v1.28.1
# https://github.com/easzlab/dockerfile-kubeasz-ext-bin
EXT_BIN_VER=1.8.0
# https://github.com/easzlab/dockerfile-kubeasz-sys-pkg
SYS_PKG_VER=1.0.0
HARBOR_VER=v2.8.4
REGISTRY_MIRROR=CN

# images downloaded by default(with 'ezdown -D')
# https://github.com/projectcalico/calico
calicoVer=v3.24.6
# https://github.com/coredns/coredns
corednsVer=1.11.1
# https://kubernetes.io/docs/tasks/administer-cluster/nodelocaldns/
dnsNodeCacheVer=1.22.23
dashboardVer=v2.7.0
dashboardMetricsScraperVer=v1.0.8
# https://github.com/kubernetes-sigs/metrics-server
metricsVer=v0.6.4
pauseVer=3.9

# images not downloaded by default(only download  with 'ezdown -X ***')
# https://github.com/cilium/cilium
ciliumVer=1.13.6
# https://github.com/flannel-io/flannel
flannelVer=v0.22.2
# https://github.com/cloudnativelabs/kube-router
kubeRouterVer=v1.5.4
# https://github.com/kubeovn/kube-ovn
kubeOvnVer=v1.11.5
# https://github.com/rancher/local-path-provisioner
localpathProvisionerVer=v0.0.24
# https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner
nfsProvisionerVer=v4.0.2
#https://github.com/prometheus-community/helm-charts/tree/main/charts/kube-prometheus-stack
promChartVer=45.23.0
#https://github.com/bitnami/charts/tree/main/bitnami/kubeapps
kubeappsVer=12.4.3

function usage() {
  echo -e "\033[33mUsage:\033[0m ezdown [options] [args]"
  cat <<EOF
  option:
    -C         stop&clean all local containers
    -D         download default binaries/images into "$BASE"
    -P <OS>    download system packages of the OS (ubuntu_22,debian_11,...)
    -R         download Registry(harbor) offline installer
    -S         start kubeasz in a container
    -X <opt>   download extra images
    -d <ver>   set docker-ce version, default "$DOCKER_VER"
    -e <ver>   set kubeasz-ext-bin version, default "$EXT_BIN_VER"
    -k <ver>   set kubeasz-k8s-bin version, default "$K8S_BIN_VER"
    -m <str>   set docker registry mirrors, default "CN"(used in Mainland,China)
    -z <ver>   set kubeasz version, default "$KUBEASZ_VER"
EOF
}

function usage-down-sys-pkg(){
  echo -e "\033[33mUsage:\033[0m ezdown -P <OS>"
  cat <<EOF
available OSes:
    almalinux_8       to download package of AlmaLinux 8
    almalinux_9       to download package of AlmaLinux 9
    centos_7          to download package of CentOS 7
    debian_10         to download package of Debian 10
    debian_11         to download package of Debian 11
    fedora_34         to download package of Fedora 34
    fedora_35         to download package of Fedora 35
    fedora_36         to download package of Fedora 36
    fedora_37         to download package of Fedora 37
    opensuse_leap_15  to download package of openSUSE Leap 15
    rocky_8           to download package of Rocky Linux 8
    rocky_9           to download package of Rocky Linux 9
    ubuntu_16         to download package of Ubuntu 16.04
    ubuntu_18         to download package of Ubuntu 18.04
    ubuntu_20         to download package of Ubuntu 20.04
    ubuntu_22         to download package of Ubuntu 22.04
examples:
    ./ezdown -P ubuntu_22
EOF
}

function usage-down-ext-img(){
  echo -e "\033[33mUsage:\033[0m ezdown -X <opt>"
  cat <<EOF
available options:
    cilium                   to download images of cilium
    flannel                  to download images of flannel
    kube-ovn                 to download images of kube-ovn
    kube-router              to download images of kube-router
    kubeapps                 to download images of kubeapps
    local-path-provisioner   to download images of local-path-provisioner
    network-check            to download images of network-check
    nfs-provisioner          to download images of nfs-provisioner
    prometheus               to download images of prometheus 
examples:
    ./ezdown -X prometheus
EOF
}

function logger() {
  TIMESTAMP=$(date +'%Y-%m-%d %H:%M:%S')
  case "$1" in
    debug)
      echo -e "$TIMESTAMP \033[36mDEBUG\033[0m $2"
      ;;
    info)
      echo -e "$TIMESTAMP \033[32mINFO\033[0m $2"
      ;;
    warn)
      echo -e "$TIMESTAMP \033[33mWARN\033[0m $2"
      ;;
    error)
      echo -e "$TIMESTAMP \033[31mERROR\033[0m $2"
      ;;
    *)
      ;;
  esac
}

function download_docker() {
  if [[ "$REGISTRY_MIRROR" == CN ]];then
    DOCKER_URL="https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/static/stable/${ARCH}/docker-${DOCKER_VER}.tgz"
  else
    DOCKER_URL="https://download.docker.com/linux/static/stable/${ARCH}/docker-${DOCKER_VER}.tgz"
  fi

  if [[ -f "$BASE/down/docker-${DOCKER_VER}.tgz" ]];then
    logger warn "docker binaries already existed"
  else
    logger info "downloading docker binaries, arch:$ARCH, version:$DOCKER_VER"
    if [[ -e /usr/bin/wget ]];then
      wget -c --no-check-certificate "$DOCKER_URL" || { logger error "downloading docker failed"; exit 1; }
    else
      curl -k -C- -O --retry 3 "$DOCKER_URL" || { logger error "downloading docker failed"; exit 1; }
    fi
    mv -f "./docker-$DOCKER_VER.tgz" "$BASE/down"
  fi

  tar zxf "$BASE/down/docker-$DOCKER_VER.tgz" -C "$BASE/down" && \
  mkdir -p "$BASE/bin/docker-bin" && \
  cp -f "$BASE"/down/docker/* "$BASE/bin/docker-bin" && \
  mv -f "$BASE"/down/docker/* /opt/kube/bin && \
  ln -sf /opt/kube/bin/docker /bin/docker 
}

function install_docker() {
  # check if a container runtime is already installed
  systemctl status docker|grep Active|grep -q running && { logger warn "docker is already running."; return 0; }
 
  logger debug "generate docker service file"
  cat > /etc/systemd/system/docker.service << EOF
[Unit]
Description=Docker Application Container Engine
Documentation=http://docs.docker.io
[Service]
Environment="PATH=/opt/kube/bin:/bin:/sbin:/usr/bin:/usr/sbin"
ExecStart=/opt/kube/bin/dockerd
ExecStartPost=/sbin/iptables -I FORWARD -s 0.0.0.0/0 -j ACCEPT
ExecReload=/bin/kill -s HUP \$MAINPID
Restart=on-failure
RestartSec=5
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
Delegate=yes
KillMode=process
[Install]
WantedBy=multi-user.target
EOF

  # configuration for dockerd
  mkdir -p /etc/docker
  DOCKER_VER_MAIN=$(echo "$DOCKER_VER"|cut -d. -f1)
  CGROUP_DRIVER="cgroupfs"
  ((DOCKER_VER_MAIN>=20)) && CGROUP_DRIVER="systemd"
  logger debug "generate docker config: /etc/docker/daemon.json"
  if [[ "$REGISTRY_MIRROR" == CN ]];then
    logger debug "prepare register mirror for $REGISTRY_MIRROR"
    cat > /etc/docker/daemon.json << EOF
{
  "exec-opts": ["native.cgroupdriver=$CGROUP_DRIVER"],
  "registry-mirrors": [
    "https://docker.nju.edu.cn/",
    "https://kuamavit.mirror.aliyuncs.com"
  ],
  "insecure-registries": ["http://easzlab.io.local:5000"],
  "max-concurrent-downloads": 10,
  "log-driver": "json-file",
  "log-level": "warn",
  "log-opts": {
    "max-size": "10m",
    "max-file": "3"
    },
  "data-root": "/var/lib/docker"
}
EOF
  else
    logger debug "standard config without registry mirrors"
    cat > /etc/docker/daemon.json << EOF
{
  "exec-opts": ["native.cgroupdriver=$CGROUP_DRIVER"],
  "insecure-registries": ["http://easzlab.io.local:5000"],
  "max-concurrent-downloads": 10,
  "log-driver": "json-file",
  "log-level": "warn",
  "log-opts": {
    "max-size": "10m",
    "max-file": "3"
    },
  "data-root": "/var/lib/docker"
}
EOF
  fi

  if [[ -f /etc/selinux/config ]]; then
    logger debug "turn off selinux"
    getenforce|grep Disabled || setenforce 0
    sed -i 's/^SELINUX=.*$/SELINUX=disabled/g' /etc/selinux/config
  fi

  logger debug "enable and start docker"
  systemctl enable docker
  systemctl daemon-reload && systemctl restart docker && sleep 3
}

function get_kubeasz() {
  # check if kubeasz already existed
  [[ -d "$BASE/roles/kube-node" ]] && { logger warn "kubeasz already existed"; return 0; }

  if [[ ! -f "$imageDir/kubeasz_$KUBEASZ_VER.tar" ]];then
    logger info "downloading kubeasz: $KUBEASZ_VER"
    docker pull "easzlab/kubeasz:$KUBEASZ_VER" && \
    docker save -o "$imageDir/kubeasz_$KUBEASZ_VER.tar" "easzlab/kubeasz:$KUBEASZ_VER"
  else
    docker load -i "$imageDir/kubeasz_$KUBEASZ_VER.tar"
  fi

  docker ps -a |grep -q temp_easz && { logger debug "remove existing container"; docker rm -f temp_easz; }
  logger debug " run a temporary container"
  docker run -d --name temp_easz easzlab/kubeasz:${KUBEASZ_VER} || { logger error "failed."; exit 1; }

  [[ -d "$BASE/down" ]] && /bin/mv -f "$BASE/down" /tmp
  [[ -d "$BASE/bin" ]] && /bin/mv -f "$BASE/bin" /tmp

  rm -rf "$BASE" && \
  logger debug "cp kubeasz code from the temporary container" && \
  docker cp "temp_easz:$BASE" "$BASE" && \
  logger debug "stop&remove temporary container" && \
  docker rm -f temp_easz

  mkdir -p "$BASE/bin" "$BASE/down"
  [[ -d "/tmp/down" ]] && /bin/mv -f /tmp/down/* "$BASE/down"
  [[ -d "/tmp/bin" ]] && /bin/mv -f /tmp/bin/* "$BASE/bin"
  return 0
}

function get_k8s_bin() {
  [[ -f "$BASE/bin/kubelet" ]] && { logger warn "kubernetes binaries existed"; return 0; }
  
  logger info "downloading kubernetes: $K8S_BIN_VER binaries"
  rm -rf "$BASE/k8s_bin_tmp"
  docker ps -a |grep -q temp_k8s_bin && { logger debug "remove existing container"; docker rm -f temp_k8s_bin; }
  docker pull easzlab/kubeasz-k8s-bin:"$K8S_BIN_VER" && \
  logger debug "run a temporary container" && \
  docker run -d --name temp_k8s_bin easzlab/kubeasz-k8s-bin:${K8S_BIN_VER} && \
  logger debug "cp k8s binaries" && \
  docker cp temp_k8s_bin:/k8s "$BASE/k8s_bin_tmp" && \
  /bin/mv -f "$BASE"/k8s_bin_tmp/* "$BASE/bin" && \
  logger debug "stop&remove temporary container" && \
  docker rm -f temp_k8s_bin && \
  rm -rf "$BASE/k8s_bin_tmp"
}

function get_ext_bin() {
  [[ -f "$BASE/bin/etcdctl" ]] && { logger warn "extra binaries existed"; return 0; }

  logger info "downloading extral binaries kubeasz-ext-bin:$EXT_BIN_VER"
  rm -rf "$BASE/extra_bin_tmp"
  docker ps -a |grep -q temp_ext_bin && { logger debug "remove existing container"; docker rm -f temp_ext_bin; }
  docker pull "easzlab/kubeasz-ext-bin:$EXT_BIN_VER" && \
  logger debug "run a temporary container" && \
  docker run -d --name temp_ext_bin "easzlab/kubeasz-ext-bin:$EXT_BIN_VER" && \
  logger debug "cp extral binaries" && \
  docker cp temp_ext_bin:/extra "$BASE/extra_bin_tmp" && \
  /bin/mv -f "$BASE"/extra_bin_tmp/* "$BASE/bin" && \
  logger debug "stop&remove temporary container" && \
  docker rm -f temp_ext_bin && \
  rm -rf "$BASE/extra_bin_tmp"
}

function get_sys_pkg() {
  [[ -f "$BASE/down/packages/$1.tgz" ]] && { logger warn "system packages for $1 existed"; return 0; }

  docker ps -a |grep -q temp_sys_pkg && { logger debug "remove existing container"; docker rm -f temp_sys_pkg; }
  logger info "downloading system packages kubeasz-sys-pkg:$SYS_PKG_VER"
  docker pull "easzlab/kubeasz-sys-pkg:$SYS_PKG_VER" && \
  logger debug "run a temporary container" && \
  docker run -d --name temp_sys_pkg "easzlab/kubeasz-sys-pkg:$SYS_PKG_VER" && \
  logger debug "cp system packages" && \
  docker cp temp_sys_pkg:/packages "$BASE/down" && \
  logger debug "stop&remove temporary container" && \
  docker rm -f temp_sys_pkg
}

function get_harbor_offline_pkg() {
  [[ -f "$BASE/down/harbor-offline-installer-$HARBOR_VER.tgz" ]] && { logger warn "harbor-offline existed"; return 0; }

  docker ps -a |grep -q temp_harbor && { logger debug "remove existing container"; docker rm -f temp_harbor; }
  logger info "downloading harbor-offline:$HARBOR_VER"
  docker pull "easzlab/harbor-offline:$HARBOR_VER" && \
  logger debug "run a temporary container" && \
  docker run -d --name temp_harbor "easzlab/harbor-offline:$HARBOR_VER" && \
  logger debug "cp harbor-offline installer package" && \
  docker cp "temp_harbor:/harbor-offline-installer-$HARBOR_VER.tgz" "$BASE/down" && \
  logger debug "stop&remove temporary container" && \
  docker rm -f temp_harbor
}

function get_default_images() {
  logger info "download default images, then upload to the local registry"

  # calico
  if [[ ! -f "$imageDir/calico_$calicoVer.tar" ]];then
    docker pull "calico/cni:$calicoVer" && \
    docker pull "calico/kube-controllers:$calicoVer" && \
    docker pull "calico/node:$calicoVer" && \
    docker save -o "$imageDir/calico_$calicoVer.tar" "calico/cni:$calicoVer" "calico/kube-controllers:$calicoVer" "calico/node:$calicoVer"
  else
    docker load -i "$imageDir/calico_$calicoVer.tar"
  fi
  docker tag "calico/cni:$calicoVer" "easzlab.io.local:5000/calico/cni:$calicoVer"
  docker push "easzlab.io.local:5000/calico/cni:$calicoVer"
  docker tag "calico/kube-controllers:$calicoVer" "easzlab.io.local:5000/calico/kube-controllers:$calicoVer"
  docker push "easzlab.io.local:5000/calico/kube-controllers:$calicoVer"
  docker tag "calico/node:$calicoVer" "easzlab.io.local:5000/calico/node:$calicoVer"
  docker push "easzlab.io.local:5000/calico/node:$calicoVer"

  # coredns
  if [[ ! -f "$imageDir/coredns_$corednsVer.tar" ]];then
    docker pull "coredns/coredns:$corednsVer" && \
    docker save -o "$imageDir/coredns_$corednsVer.tar" "coredns/coredns:$corednsVer"
  else
    docker load -i "$imageDir/coredns_$corednsVer.tar"
  fi
  docker tag "coredns/coredns:$corednsVer" "easzlab.io.local:5000/coredns/coredns:$corednsVer"
  docker push "easzlab.io.local:5000/coredns/coredns:$corednsVer"

  # dns-node-cache
  if [[ ! -f "$imageDir/k8s-dns-node-cache_$dnsNodeCacheVer.tar" ]];then
    docker pull "easzlab/k8s-dns-node-cache:$dnsNodeCacheVer" && \
    docker save -o "$imageDir/k8s-dns-node-cache_$dnsNodeCacheVer.tar" "easzlab/k8s-dns-node-cache:$dnsNodeCacheVer" 
  else
    docker load -i "$imageDir/k8s-dns-node-cache_$dnsNodeCacheVer.tar"
  fi
  docker tag "easzlab/k8s-dns-node-cache:$dnsNodeCacheVer" "easzlab.io.local:5000/easzlab/k8s-dns-node-cache:$dnsNodeCacheVer"
  docker push "easzlab.io.local:5000/easzlab/k8s-dns-node-cache:$dnsNodeCacheVer"

  # dashboard
  if [[ ! -f "$imageDir/dashboard_$dashboardVer.tar" ]];then
    docker pull "kubernetesui/dashboard:$dashboardVer" && \
    docker save -o "$imageDir/dashboard_$dashboardVer.tar" "kubernetesui/dashboard:$dashboardVer"
  else
    docker load -i "$imageDir/dashboard_$dashboardVer.tar"
  fi
  docker tag "kubernetesui/dashboard:$dashboardVer" "easzlab.io.local:5000/kubernetesui/dashboard:$dashboardVer"
  docker push "easzlab.io.local:5000/kubernetesui/dashboard:$dashboardVer"

  # dashboard-metrics-scraper
  if [[ ! -f "$imageDir/metrics-scraper_$dashboardMetricsScraperVer.tar" ]];then
    docker pull "kubernetesui/metrics-scraper:$dashboardMetricsScraperVer" && \
    docker save -o "$imageDir/metrics-scraper_$dashboardMetricsScraperVer.tar" "kubernetesui/metrics-scraper:$dashboardMetricsScraperVer"
  else
    docker load -i "$imageDir/metrics-scraper_$dashboardMetricsScraperVer.tar"
  fi
  docker tag "kubernetesui/metrics-scraper:$dashboardMetricsScraperVer" "easzlab.io.local:5000/kubernetesui/metrics-scraper:$dashboardMetricsScraperVer"
  docker push "easzlab.io.local:5000/kubernetesui/metrics-scraper:$dashboardMetricsScraperVer"

  # metrics-server
  if [[ ! -f "$imageDir/metrics-server_$metricsVer.tar" ]];then
    docker pull "easzlab/metrics-server:$metricsVer" && \
    docker save -o "$imageDir/metrics-server_$metricsVer.tar" "easzlab/metrics-server:$metricsVer"
  else
    docker load -i "$imageDir/metrics-server_$metricsVer.tar"
  fi
  docker tag "easzlab/metrics-server:$metricsVer" "easzlab.io.local:5000/easzlab/metrics-server:$metricsVer"
  docker push "easzlab.io.local:5000/easzlab/metrics-server:$metricsVer"

  # pause
  if [[ ! -f "$imageDir/pause_$pauseVer.tar" ]];then
    docker pull "easzlab/pause:$pauseVer" && \
    docker save -o "$imageDir/pause_$pauseVer.tar" "easzlab/pause:$pauseVer"
  else
    docker load -i "$imageDir/pause_$pauseVer.tar"
  fi
  docker tag "easzlab/pause:$pauseVer" "easzlab.io.local:5000/easzlab/pause:$pauseVer"
  docker push "easzlab.io.local:5000/easzlab/pause:$pauseVer"
}

function get_extra_images() {
  logger info "download images for $1, then upload to the local registry"

  case "$1" in
    # cilium images
    cilium)
      if [[ ! -f "$imageDir/cilium_$ciliumVer.tar" ]];then
        docker pull "cilium/cilium:v$ciliumVer" && \
        docker pull "cilium/operator-generic:v$ciliumVer" && \
        docker pull "cilium/hubble-relay:v$ciliumVer" && \
        docker pull cilium/hubble-ui-backend:v0.11.0 && \
        docker pull cilium/hubble-ui:v0.11.0 && \
        docker save -o "$imageDir/cilium_$ciliumVer.tar" "cilium/cilium:v$ciliumVer" \
    		"cilium/operator-generic:v$ciliumVer" \
    		"cilium/hubble-relay:v$ciliumVer" \
    		cilium/hubble-ui-backend:v0.11.0 \
    		cilium/hubble-ui:v0.11.0
      else
        docker load -i "$imageDir/cilium_$ciliumVer.tar"
      fi
      docker tag "cilium/cilium:v$ciliumVer" "easzlab.io.local:5000/cilium/cilium:v$ciliumVer"
      docker push "easzlab.io.local:5000/cilium/cilium:v$ciliumVer"
      docker tag "cilium/operator-generic:v$ciliumVer" "easzlab.io.local:5000/cilium/operator-generic:v$ciliumVer"
      docker push "easzlab.io.local:5000/cilium/operator-generic:v$ciliumVer"
      docker tag "cilium/hubble-relay:v$ciliumVer" "easzlab.io.local:5000/cilium/hubble-relay:v$ciliumVer"
      docker push "easzlab.io.local:5000/cilium/hubble-relay:v$ciliumVer"
      docker tag cilium/hubble-ui-backend:v0.11.0 easzlab.io.local:5000/cilium/hubble-ui-backend:v0.11.0
      docker push easzlab.io.local:5000/cilium/hubble-ui-backend:v0.11.0
      docker tag cilium/hubble-ui:v0.11.0 easzlab.io.local:5000/cilium/hubble-ui:v0.11.0
      docker push easzlab.io.local:5000/cilium/hubble-ui:v0.11.0
      ;;

    # flannel image
    flannel)
      if [[ ! -f "$imageDir/flannel_$flannelVer.tar" ]];then
        docker pull "flannel/flannel:$flannelVer" && \
        docker pull "flannel/flannel-cni-plugin:v1.2.0" && \
        docker save -o "$imageDir/flannel_$flannelVer.tar" "flannel/flannel:$flannelVer" "flannel/flannel-cni-plugin:v1.2.0"
      else
        docker load -i "$imageDir/flannel_$flannelVer.tar"
      fi
      docker tag "flannel/flannel:$flannelVer" "easzlab.io.local:5000/flannel/flannel:$flannelVer"
      docker push "easzlab.io.local:5000/flannel/flannel:$flannelVer"
      docker tag "flannel/flannel-cni-plugin:v1.2.0" "easzlab.io.local:5000/flannel/flannel-cni-plugin:v1.2.0"
      docker push "easzlab.io.local:5000/flannel/flannel-cni-plugin:v1.2.0"
      ;;

    # kubeapps images
    kubeapps)
      if [[ ! -f "$imageDir/kubeapps_$kubeappsVer.tar" ]];then
        docker pull "bitnami/kubeapps-apis:2.7.0-debian-11-r10" && \
        docker pull "bitnami/kubeapps-apprepository-controller:2.7.0-scratch-r0" && \
        docker pull "bitnami/kubeapps-asset-syncer:2.7.0-scratch-r0" && \
        docker pull "bitnami/kubeapps-dashboard:2.7.0-debian-11-r12" && \
        docker pull "bitnami/nginx:1.23.4-debian-11-r18" && \
        docker pull "bitnami/postgresql:15.3.0-debian-11-r0" && \
        docker save -o "$imageDir/kubeapps_$kubeappsVer.tar" \
                    "bitnami/kubeapps-apis:2.7.0-debian-11-r10" \
                    "bitnami/kubeapps-apprepository-controller:2.7.0-scratch-r0" \
                    "bitnami/kubeapps-asset-syncer:2.7.0-scratch-r0" \
                    "bitnami/kubeapps-dashboard:2.7.0-debian-11-r12" \
                    "bitnami/nginx:1.23.4-debian-11-r18" \
                    "bitnami/postgresql:15.3.0-debian-11-r0"
      else
        docker load -i "$imageDir/kubeapps_$kubeappsVer.tar"
      fi
      docker tag "bitnami/kubeapps-apis:2.7.0-debian-11-r10" "easzlab.io.local:5000/bitnami/kubeapps-apis:2.7.0-debian-11-r10"
      docker tag "bitnami/kubeapps-apprepository-controller:2.7.0-scratch-r0" "easzlab.io.local:5000/bitnami/kubeapps-apprepository-controller:2.7.0-scratch-r0"
      docker tag "bitnami/kubeapps-asset-syncer:2.7.0-scratch-r0" "easzlab.io.local:5000/bitnami/kubeapps-asset-syncer:2.7.0-scratch-r0"
      docker tag "bitnami/kubeapps-dashboard:2.7.0-debian-11-r12" "easzlab.io.local:5000/bitnami/kubeapps-dashboard:2.7.0-debian-11-r12"
      docker tag "bitnami/nginx:1.23.4-debian-11-r18" "easzlab.io.local:5000/bitnami/nginx:1.23.4-debian-11-r18"
      docker tag "bitnami/postgresql:15.3.0-debian-11-r0" "easzlab.io.local:5000/bitnami/postgresql:15.3.0-debian-11-r0"
      docker push "easzlab.io.local:5000/bitnami/kubeapps-apis:2.7.0-debian-11-r10"
      docker push "easzlab.io.local:5000/bitnami/kubeapps-apprepository-controller:2.7.0-scratch-r0"
      docker push "easzlab.io.local:5000/bitnami/kubeapps-asset-syncer:2.7.0-scratch-r0"
      docker push "easzlab.io.local:5000/bitnami/kubeapps-dashboard:2.7.0-debian-11-r12"
      docker push "easzlab.io.local:5000/bitnami/nginx:1.23.4-debian-11-r18"
      docker push "easzlab.io.local:5000/bitnami/postgresql:15.3.0-debian-11-r0"
      ;;

    # kube-ovn images
    kube-ovn)
      if [[ ! -f "$imageDir/kube-ovn_$kubeOvnVer.tar" ]];then
        docker pull "kubeovn/kube-ovn:$kubeOvnVer" && \
        docker save -o "$imageDir/kube-ovn_$kubeOvnVer.tar" "kubeovn/kube-ovn:$kubeOvnVer"
      else
        docker load -i "$imageDir/kube-ovn_$kubeOvnVer.tar"
      fi
      docker tag "kubeovn/kube-ovn:$kubeOvnVer" "easzlab.io.local:5000/kubeovn/kube-ovn:$kubeOvnVer"
      docker push "easzlab.io.local:5000/kubeovn/kube-ovn:$kubeOvnVer"
      ;;

    # kube-router images
    kube-router)
      if [[ ! -f "$imageDir/kube-router_$kubeRouterVer.tar" ]];then
        docker pull "cloudnativelabs/kube-router:$kubeRouterVer" && \
        docker save -o "$imageDir/kube-router_$kubeRouterVer.tar" "cloudnativelabs/kube-router:$kubeRouterVer"
      else
        docker load -i "$imageDir/kube-router_$kubeRouterVer.tar"
      fi
      docker tag "cloudnativelabs/kube-router:$kubeRouterVer" "easzlab.io.local:5000/cloudnativelabs/kube-router:$kubeRouterVer"
      docker push "easzlab.io.local:5000/cloudnativelabs/kube-router:$kubeRouterVer"
      ;;

    # local-path-provisioner image
    local-path-provisioner)
      if [[ ! -f "$imageDir/local-path-provisioner_$localpathProvisionerVer.tar" ]];then
        docker pull "rancher/local-path-provisioner:$localpathProvisionerVer" && \
        docker save -o "$imageDir/local-path-provisioner_$localpathProvisionerVer.tar" "rancher/local-path-provisioner:$localpathProvisionerVer"
      else
        docker load -i "$imageDir/local-path-provisioner_$localpathProvisionerVer.tar"
      fi
      docker tag "rancher/local-path-provisioner:$localpathProvisionerVer" "easzlab.io.local:5000/rancher/local-path-provisioner:$localpathProvisionerVer"
      docker push "easzlab.io.local:5000/rancher/local-path-provisioner:$localpathProvisionerVer"
      ;;

    # network-check images
    network-check)
      if [[ ! -f "$imageDir/network-check.tar" ]];then
        docker pull easzlab/json-mock:v1.3.0 && \
        docker pull easzlab/alpine-curl:v7.85.0 && \
        docker save -o "$imageDir/network-check.tar" easzlab/json-mock:v1.3.0 easzlab/alpine-curl:v7.85.0
      else
        docker load -i "$imageDir/network-check.tar"
      fi
      docker tag easzlab/json-mock:v1.3.0 easzlab.io.local:5000/cilium/json-mock:v1.3.0
      docker push easzlab.io.local:5000/cilium/json-mock:v1.3.0
      docker tag easzlab/alpine-curl:v7.85.0 easzlab.io.local:5000/easzlab/alpine-curl:v7.85.0
      docker push easzlab.io.local:5000/easzlab/alpine-curl:v7.85.0
      ;;

    # nfs-provisioner image
    nfs-provisioner)
      if [[ ! -f "$imageDir/nfs-provisioner_$nfsProvisionerVer.tar" ]];then
        docker pull "easzlab/nfs-subdir-external-provisioner:$nfsProvisionerVer" && \
        docker save -o "$imageDir/nfs-provisioner_$nfsProvisionerVer.tar" "easzlab/nfs-subdir-external-provisioner:$nfsProvisionerVer"
      else
        docker load -i "$imageDir/nfs-provisioner_$nfsProvisionerVer.tar"
      fi
      docker tag "easzlab/nfs-subdir-external-provisioner:$nfsProvisionerVer" "easzlab.io.local:5000/easzlab/nfs-subdir-external-provisioner:$nfsProvisionerVer"
      docker push "easzlab.io.local:5000/easzlab/nfs-subdir-external-provisioner:$nfsProvisionerVer"
      ;;

    # prometheus chart images
    prometheus)
      if [[ ! -f "$imageDir/prometheus-chart_$promChartVer.tar" ]];then
        docker pull easzlab/kube-state-metrics:v2.8.2 && \
        docker pull easzlab/kube-webhook-certgen:v1.5.1 && \
        docker pull grafana/grafana:9.4.7 && \
        docker pull quay.io/kiwigrid/k8s-sidecar:1.22.0 && \
        docker pull quay.io/prometheus-operator/prometheus-config-reloader:v0.63.0 && \
        docker pull quay.io/prometheus-operator/prometheus-operator:v0.63.0 && \
        docker pull quay.io/prometheus/alertmanager:v0.25.0 && \
        docker pull quay.io/prometheus/node-exporter:v1.5.0 && \
        docker pull quay.io/prometheus/prometheus:v2.42.0 && \
        docker save -o "$imageDir/prometheus-chart_$promChartVer.tar" \
            easzlab/kube-state-metrics:v2.8.2 \
            easzlab/kube-webhook-certgen:v1.5.1 \
            grafana/grafana:9.4.7 \
            quay.io/kiwigrid/k8s-sidecar:1.22.0 \
            quay.io/prometheus-operator/prometheus-config-reloader:v0.63.0 \
            quay.io/prometheus-operator/prometheus-operator:v0.63.0 \
            quay.io/prometheus/alertmanager:v0.25.0 \
            quay.io/prometheus/node-exporter:v1.5.0 \
            quay.io/prometheus/prometheus:v2.42.0
      else
        docker load -i "$imageDir/prometheus-chart_$promChartVer.tar"
      fi
      docker tag easzlab/kube-state-metrics:v2.8.2 easzlab.io.local:5000/prometheus/kube-state-metrics:v2.8.2
      docker push easzlab.io.local:5000/prometheus/kube-state-metrics:v2.8.2
      docker tag easzlab/kube-webhook-certgen:v1.5.1 easzlab.io.local:5000/prometheus/kube-webhook-certgen:v1.5.1
      docker push easzlab.io.local:5000/prometheus/kube-webhook-certgen:v1.5.1
      docker tag grafana/grafana:9.4.7 easzlab.io.local:5000/prometheus/grafana:9.4.7
      docker push easzlab.io.local:5000/prometheus/grafana:9.4.7
      docker tag quay.io/kiwigrid/k8s-sidecar:1.22.0 easzlab.io.local:5000/prometheus/k8s-sidecar:1.22.0
      docker push easzlab.io.local:5000/prometheus/k8s-sidecar:1.22.0
      docker tag quay.io/prometheus-operator/prometheus-config-reloader:v0.63.0 easzlab.io.local:5000/prometheus/prometheus-config-reloader:v0.63.0
      docker push easzlab.io.local:5000/prometheus/prometheus-config-reloader:v0.63.0
      docker tag quay.io/prometheus-operator/prometheus-operator:v0.63.0 easzlab.io.local:5000/prometheus/prometheus-operator:v0.63.0
      docker push easzlab.io.local:5000/prometheus/prometheus-operator:v0.63.0
      docker tag quay.io/prometheus/alertmanager:v0.25.0 easzlab.io.local:5000/prometheus/alertmanager:v0.25.0
      docker push easzlab.io.local:5000/prometheus/alertmanager:v0.25.0
      docker tag quay.io/prometheus/node-exporter:v1.5.0 easzlab.io.local:5000/prometheus/node-exporter:v1.5.0
      docker push easzlab.io.local:5000/prometheus/node-exporter:v1.5.0
      docker tag quay.io/prometheus/prometheus:v2.42.0 easzlab.io.local:5000/prometheus/prometheus:v2.42.0
      docker push easzlab.io.local:5000/prometheus/prometheus:v2.42.0
      ;;

    *)
      logger error "invalid option: $1"
      usage-down-ext-img
      exit 1
      ;;
  esac
}

function download_all() {
  mkdir -p /opt/kube/bin "$BASE/down" "$BASE/bin"
  download_docker && \
  install_docker && \
  get_kubeasz && \
  get_k8s_bin && \
  get_ext_bin && \
  start_local_registry && \
  get_default_images
}

function start_local_registry() {
  docker ps -a --format="{{ .Names }}"|grep local_registry > /dev/null 2>&1 && \
  { logger warn "local_registry is already running"; return 0; }

  if [[ ! -f "$imageDir/registry-2.tar" ]];then
    docker pull "registry:2" && \
    docker save -o "$imageDir/registry-2.tar" "registry:2"
  fi

  logger info "start local registry ..."
  docker load -i "$imageDir/registry-2.tar" > /dev/null
  mkdir -p /opt/kube/registry
  docker run -d \
        --name local_registry \
        --network host \
        --restart always \
        --volume /opt/kube/registry:/var/lib/registry \
        registry:2

  sed -i "/easzlab.io.local/d" /etc/hosts
  echo "127.0.0.1  easzlab.io.local" >> /etc/hosts
}


function start_kubeasz_docker() {
  # create cmd alias in /root/.bashrc
  sed -i '/docker exec/d' /root/.bashrc
  echo "alias dk='docker exec -it kubeasz'  # generated by kubeasz" >> /root/.bashrc

  [[ -d "$BASE/roles/kube-node" ]] || { logger error "not initialized. try 'ezdown -D' first."; exit 1; }
  docker ps -a --format="{{ .Names }}"|grep kubeasz > /dev/null 2>&1 && \
  docker rm -f kubeasz > /dev/null

  if [[ ! -f "$imageDir/kubeasz_$KUBEASZ_VER.tar" ]];then
    logger info "downloading kubeasz: $KUBEASZ_VER"
    docker pull "easzlab/kubeasz:$KUBEASZ_VER" && \
    docker save -o "$imageDir/kubeasz_$KUBEASZ_VER.tar" "easzlab/kubeasz:$KUBEASZ_VER"
  else
    docker load -i "$imageDir/kubeasz_$KUBEASZ_VER.tar"
  fi

  logger info "try to run kubeasz in a container"
  # get host's IP
  host_if=$(ip route|grep default|head -n1|cut -d' ' -f5)
  host_ip=$(ip a|grep "$host_if$"|head -n1|awk '{print $2}'|cut -d'/' -f1)
  logger debug "get host IP: $host_ip"

  # allow ssh login using key locally
  if [[ ! -e /root/.ssh/id_rsa ]]; then
    logger debug "generate ssh key pair"
    ssh-keygen -t rsa -b 2048 -N '' -f /root/.ssh/id_rsa > /dev/null
    cat /root/.ssh/id_rsa.pub >> /root/.ssh/authorized_keys
    ssh-keyscan -t ecdsa -H "$host_ip" >> /root/.ssh/known_hosts
  fi

  # run kubeasz docker container
  docker run --detach \
      --env HOST_IP="$host_ip" \
      --name kubeasz \
      --network host \
      --restart always \
      --volume "$BASE":"$BASE" \
      --volume /root/.kube:/root/.kube \
      --volume /root/.ssh:/root/.ssh \
      --volume /etc/docker:/etc/docker \
      easzlab/kubeasz:${KUBEASZ_VER}
}

function clean_container() {
 logger info "clean all running containers"
 docker ps -a|awk 'NR>1{print $1}'|xargs docker rm -f 
} 


### Main Lines ##################################################
function main() {
  BASE="/etc/kubeasz"
  imageDir="$BASE/down"

  # check if use bash shell
  readlink /proc/$$/exe|grep -q "bash" || { logger error "you should use bash shell, not sh"; exit 1; }
  # check if use with root
  [[ "$EUID" -ne 0 ]] && { logger error "you should run this script as root"; exit 1; }

  # get architecture
  ARCH=$(uname -m)

  [[ "$#" -eq 0 ]] && { usage >&2; exit 1; }
  
  ACTION=""
  while getopts "CDP:RSX:d:e:k:m:z:" OPTION; do
      case "$OPTION" in
        C)
          ACTION="clean_container"
          ;;
        D)
          ACTION="download_all"
          ;;
        P)
          [[ $OPTARG =~ (ubuntu_[0-9]+|centos_[0-9]+|debian_[0-9]+|fedora_[0-9]+|almalinux_[0-9]+|opensuse_leap_[0-9]+|rocky_[0-9]+) ]] || \
          { usage-down-sys-pkg; exit 1; }
          SYS_PKG_VER="${SYS_PKG_VER}_$OPTARG"
          ACTION="get_sys_pkg $OPTARG"
          ;;
        R)
          ACTION="get_harbor_offline_pkg"
          ;;
        S)
          ACTION="start_kubeasz_docker"
          ;;
        X)
          ACTION="get_extra_images $OPTARG"
          ;;
        d)
          DOCKER_VER="$OPTARG"
          ;;
        e)
          EXT_BIN_VER="$OPTARG"
          ;;
        k)
          K8S_BIN_VER="$OPTARG"
          ;;
        m)
          REGISTRY_MIRROR="$OPTARG"
          ;;
        z)
          KUBEASZ_VER="$OPTARG"
          ;;
        ?)
          usage
          exit 1
          ;;
      esac
  done
  
  [[ "$ACTION" == "" ]] && { logger error "illegal option"; usage; exit 1; }
  
  # excute cmd "$ACTION" 
  logger info "Action begin: $ACTION"
  ${ACTION} || { logger error "Action failed: $ACTION"; return 1; }
  logger info "Action successed: $ACTION"
}

main "$@"