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kubeasz
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kubeasz/tools/easzup

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#!/bin/bash
#--------------------------------------------------
# This script is for:
# 1. to download the scripts/binaries/images needed for installing a k8s cluster with kubeasz
# 2. to run kubeasz in a container
# @author: gjmzj
# @usage: ./easzup
# @repo: https://github.com/easzlab/kubeasz
# @ref: https://github.com/kubeasz/dockerfiles
#--------------------------------------------------
set -o nounset
set -o errexit
#set -o xtrace
# default version, can be overridden by cmd line options
export DOCKER_VER=19.03.8
export KUBEASZ_VER=2.2.0
export K8S_BIN_VER=v1.18.3
export EXT_BIN_VER=0.5.2
export SYS_PKG_VER=0.3.3
function download_docker() {
[[ -f "/etc/ansible/bin/dockerd" ]] && { echo "[WARN] docker is downloaded."; return 0; }
echo -e "[INFO] \033[33mdownloading docker binaries\033[0m $DOCKER_VER"
if [[ "$REGISTRY_MIRROR" == CN ]];then
DOCKER_URL="https://mirrors.tuna.tsinghua.edu.cn/docker-ce/linux/static/stable/x86_64/docker-${DOCKER_VER}.tgz"
else
DOCKER_URL="https://download.docker.com/linux/static/stable/x86_64/docker-${DOCKER_VER}.tgz"
fi
mkdir -p /opt/kube/bin /etc/ansible/down /etc/ansible/bin
if [[ -f "/etc/ansible/down/docker-${DOCKER_VER}.tgz" ]];then
echo "[INFO] docker binaries already existed"
else
echo -e "[INFO] \033[33mdownloading docker binaries\033[0m $DOCKER_VER"
if [[ -e /usr/bin/curl ]];then
curl -C- -O --retry 3 "$DOCKER_URL" || { echo "[ERROR] downloading docker failed"; exit 1; }
else
wget -c "$DOCKER_URL" || { echo "[ERROR] downloading docker failed"; exit 1; }
fi
/bin/mv -f ./docker-${DOCKER_VER}.tgz /etc/ansible/down
fi
tar zxf /etc/ansible/down/docker-${DOCKER_VER}.tgz -C /etc/ansible/down && \
/bin/cp -f /etc/ansible/down/docker/* /etc/ansible/bin && \
/bin/mv -f /etc/ansible/down/docker/* /opt/kube/bin && \
ln -sf /opt/kube/bin/docker /bin/docker
}
function install_docker() {
# check if a container runtime is already installed
systemctl status docker|grep Active|grep -q running && { echo "[WARN] docker is already running."; return 0; }
which docker && { echo "[WARN] docker is installed."; systemctl restart docker; return 0; }
echo "[INFO] generate docker service file"
cat > /etc/systemd/system/docker.service << EOF
[Unit]
Description=Docker Application Container Engine
Documentation=http://docs.docker.io
[Service]
Environment="PATH=/opt/kube/bin:/bin:/sbin:/usr/bin:/usr/sbin"
ExecStart=/opt/kube/bin/dockerd
ExecStartPost=/sbin/iptables -I FORWARD -s 0.0.0.0/0 -j ACCEPT
ExecReload=/bin/kill -s HUP \$MAINPID
Restart=on-failure
RestartSec=5
LimitNOFILE=infinity
LimitNPROC=infinity
LimitCORE=infinity
Delegate=yes
KillMode=process
[Install]
WantedBy=multi-user.target
EOF
# configuration for dockerd
mkdir -p /etc/docker
echo "[INFO] generate docker config file"
if [[ "$REGISTRY_MIRROR" == CN ]];then
echo "[INFO] prepare register mirror for $REGISTRY_MIRROR"
cat > /etc/docker/daemon.json << EOF
{
"registry-mirrors": [
"https://docker.mirrors.ustc.edu.cn",
"http://hub-mirror.c.163.com"
],
"max-concurrent-downloads": 10,
"log-driver": "json-file",
"log-level": "warn",
"log-opts": {
"max-size": "10m",
"max-file": "3"
},
"data-root": "/var/lib/docker"
}
EOF
else
echo "[INFO] standard config without registry mirrors"
cat > /etc/docker/daemon.json << EOF
{
"max-concurrent-downloads": 10,
"log-driver": "json-file",
"log-level": "warn",
"log-opts": {
"max-size": "10m",
"max-file": "3"
},
"data-root": "/var/lib/docker"
}
EOF
fi
if [[ -e /etc/centos-release || -e /etc/redhat-release ]]; then
echo "[INFO] turn off selinux in CentOS/Redhat"
getenforce|grep Disabled || setenforce 0
sed -i 's/^SELINUX=.*$/SELINUX=disabled/g' /etc/selinux/config
fi
echo "[INFO] enable and start docker"
systemctl enable docker
systemctl daemon-reload && systemctl restart docker && sleep 4
}
function get_kubeasz() {
# check if kubeasz already existed
[[ -d "/etc/ansible/roles/kube-node" ]] && { echo "[WARN] kubeasz already existed"; return 0; }
echo -e "[INFO] \033[33mdownloading kubeasz\033[0m $KUBEASZ_VER"
echo "[INFO] run a temporary container"
docker run -d --name temp_easz easzlab/kubeasz:${KUBEASZ_VER} || { echo "[ERROR] download failed."; exit 1; }
[[ -f "/etc/ansible/down/docker-${DOCKER_VER}.tgz" ]] && /bin/mv -f "/etc/ansible/down/docker-${DOCKER_VER}.tgz" /tmp
rm -rf /etc/ansible && \
echo "[INFO] cp kubeasz code from the temporary container" && \
docker cp temp_easz:/etc/ansible /etc/ansible && \
echo "[INFO] stop&remove temporary container" && \
docker rm -f temp_easz
[[ -f "/tmp/docker-${DOCKER_VER}.tgz" ]] && /bin/mv -f "/tmp/docker-${DOCKER_VER}.tgz" /etc/ansible/down
[[ -d "/opt/kube/bin" ]] && /bin/mv -f "/opt/kube/bin/*" /etc/ansible/bin
return 0
}
function get_k8s_bin() {
[[ -f "/etc/ansible/bin/kubelet" ]] && { echo "[WARN] kubernetes binaries existed"; return 0; }
echo -e "[INFO] \033[33mdownloading kubernetes\033[0m $K8S_BIN_VER binaries"
docker pull easzlab/kubeasz-k8s-bin:${K8S_BIN_VER} && \
echo "[INFO] run a temporary container" && \
docker run -d --name temp_k8s_bin easzlab/kubeasz-k8s-bin:${K8S_BIN_VER} && \
echo "[INFO] cp k8s binaries" && \
docker cp temp_k8s_bin:/k8s /k8s_bin_tmp && \
/bin/mv -f /k8s_bin_tmp/* /etc/ansible/bin && \
echo "[INFO] stop&remove temporary container" && \
docker rm -f temp_k8s_bin && \
rm -rf /k8s_bin_tmp
}
function get_ext_bin() {
[[ -f "/etc/ansible/bin/etcdctl" ]] && { echo "[WARN] extral binaries existed"; return 0; }
echo -e "[INFO] \033[33mdownloading extral binaries\033[0m kubeasz-ext-bin:$EXT_BIN_VER"
docker pull easzlab/kubeasz-ext-bin:${EXT_BIN_VER} && \
echo "[INFO] run a temporary container" && \
docker run -d --name temp_ext_bin easzlab/kubeasz-ext-bin:${EXT_BIN_VER} && \
echo "[INFO] cp extral binaries" && \
docker cp temp_ext_bin:/extra /extra_bin_tmp && \
/bin/mv -f /extra_bin_tmp/* /etc/ansible/bin && \
echo "[INFO] stop&remove temporary container" && \
docker rm -f temp_ext_bin && \
rm -rf /extra_bin_tmp
}
function get_sys_pkg() {
[[ -f "/etc/ansible/down/packages/chrony_xenial.tar.gz" ]] && { echo "[WARN] system packages existed"; return 0; }
echo -e "[INFO] \033[33mdownloading system packages\033[0m kubeasz-sys-pkg:$SYS_PKG_VER"
docker pull easzlab/kubeasz-sys-pkg:${SYS_PKG_VER} && \
echo "[INFO] run a temporary container" && \
docker run -d --name temp_sys_pkg easzlab/kubeasz-sys-pkg:${SYS_PKG_VER} && \
echo "[INFO] cp system packages" && \
docker cp temp_sys_pkg:/packages /etc/ansible/down && \
echo "[INFO] stop&remove temporary container" && \
docker rm -f temp_sys_pkg
}
function get_offline_image() {
# images needed by k8s cluster
calicoVer=v3.8.8
corednsVer=1.6.7
dashboardVer=v2.0.1
dashboardMetricsScraperVer=v1.0.4
flannelVer=v0.12.0-amd64
metricsVer=v0.3.6
pauseVer=3.2
imageDir=/etc/ansible/down
[[ -d "$imageDir" ]] || { echo "[ERROR] $imageDir not existed!"; exit 1; }
echo -e "[INFO] \033[33mdownloading offline images\033[0m"
if [[ ! -f "$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:${calicoVer}
fi
if [[ ! -f "$imageDir/coredns_$corednsVer.tar" ]];then
docker pull coredns/coredns:${corednsVer} && \
docker save -o ${imageDir}/coredns_${corednsVer}.tar coredns/coredns:${corednsVer}
fi
if [[ ! -f "$imageDir/dashboard_$dashboardVer.tar" ]];then
docker pull kubernetesui/dashboard:${dashboardVer} && \
docker save -o ${imageDir}/dashboard_${dashboardVer}.tar kubernetesui/dashboard:${dashboardVer}
fi
if [[ ! -f "$imageDir/flannel_$flannelVer.tar" ]];then
docker pull easzlab/flannel:${flannelVer} && \
docker save -o ${imageDir}/flannel_${flannelVer}.tar easzlab/flannel:${flannelVer}
fi
if [[ ! -f "$imageDir/metrics-scraper_$dashboardMetricsScraperVer.tar" ]];then
docker pull kubernetesui/metrics-scraper:${dashboardMetricsScraperVer} && \
docker save -o ${imageDir}/metrics-scraper_${dashboardMetricsScraperVer}.tar kubernetesui/metrics-scraper:${dashboardMetricsScraperVer}
fi
if [[ ! -f "$imageDir/metrics-server_$metricsVer.tar" ]];then
docker pull mirrorgooglecontainers/metrics-server-amd64:${metricsVer} && \
docker save -o ${imageDir}/metrics-server_${metricsVer}.tar mirrorgooglecontainers/metrics-server-amd64:${metricsVer}
fi
if [[ ! -f "$imageDir/pause_$pauseVer.tar" ]];then
docker pull easzlab/pause-amd64:${pauseVer} && \
docker save -o ${imageDir}/pause_${pauseVer}.tar easzlab/pause-amd64:${pauseVer}
/bin/cp -u "${imageDir}/pause_${pauseVer}.tar" "${imageDir}/pause.tar"
fi
if [[ ! -f "$imageDir/kubeasz_$KUBEASZ_VER.tar" ]];then
docker pull easzlab/kubeasz:${KUBEASZ_VER} && \
docker save -o ${imageDir}/kubeasz_${KUBEASZ_VER}.tar easzlab/kubeasz:${KUBEASZ_VER}
fi
}
function download_all() {
download_docker && \
install_docker && \
get_kubeasz && \
get_k8s_bin && \
get_ext_bin && \
get_offline_image
}
function start_kubeasz_docker() {
[[ -d "/etc/ansible/roles/kube-node" ]] || { echo "[ERROR] not initialized. try 'easzup -D' first."; exit 1; }
# get host's IP
host_if=$(ip route|grep default|cut -d' ' -f5)
host_ip=$(ip a|grep "$host_if$"|awk '{print $2}'|cut -d'/' -f1)
echo "[INFO] get host IP: $host_ip"
# allow ssh login using key locally
if [[ ! -e /root/.ssh/id_rsa ]]; then
echo "[INFO] generate ssh key pair"
ssh-keygen -t rsa -b 2048 -N '' -f /root/.ssh/id_rsa > /dev/null
cat /root/.ssh/id_rsa.pub >> /root/.ssh/authorized_keys
ssh-keyscan -t ecdsa -H "$host_ip" >> /root/.ssh/known_hosts
fi
# create a link '/usr/bin/python' in Ubuntu1604
if [[ ! -e /usr/bin/python && -e /etc/debian_version ]]; then
echo "[INFO] create a soft link '/usr/bin/python'"
ln -s /usr/bin/python3 /usr/bin/python
fi
#
docker load -i /etc/ansible/down/kubeasz_${KUBEASZ_VER}.tar
# run kubeasz docker container
echo "[INFO] run kubeasz in a container"
docker run --detach \
--name kubeasz \
--restart always \
--env HOST_IP="$host_ip" \
--volume /etc/ansible:/etc/ansible \
--volume /root/.kube:/root/.kube \
--volume /root/.ssh/id_rsa:/root/.ssh/id_rsa:ro \
--volume /root/.ssh/id_rsa.pub:/root/.ssh/id_rsa.pub:ro \
--volume /root/.ssh/known_hosts:/root/.ssh/known_hosts:ro \
easzlab/kubeasz:${KUBEASZ_VER} sleep 36000
}
function clean_container() {
echo "[INFO] clean all running containers"
docker ps -a|awk 'NR>1{print $1}'|xargs docker rm -f
}
function usage() {
cat <<EOF
Usage: easzup [options] [args]
option: -{DdekSz}
-C stop&clean all local containers
-D download all into /etc/ansible
-P download system packages for offline installing
-S start kubeasz in a container
-d <ver> set docker-ce version, default "$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)
-p <ver> set kubeasz-sys-pkg version, default "$SYS_PKG_VER"
-z <ver> set kubeasz version, default "$KUBEASZ_VER"
see more at https://github.com/kubeasz/dockerfiles
EOF
}
### Main Lines ##################################################
function main() {
# check if use bash shell
readlink /proc/$$/exe|grep -q "dash" && { echo "[ERROR] you should use bash shell, not sh"; exit 1; }
# check if use with root
[[ "$EUID" -ne 0 ]] && { echo "[ERROR] you should run this script as root"; exit 1; }
[[ "$#" -eq 0 ]] && { usage >&2; exit 1; }
export REGISTRY_MIRROR="CN"
ACTION=""
while getopts "CDPSd:e:k:m:p:z:" OPTION; do
case "$OPTION" in
C)
ACTION="clean_container"
;;
D)
ACTION="download_all"
;;
P)
ACTION="get_sys_pkg"
;;
S)
ACTION="start_kubeasz_docker"
;;
d)
export DOCKER_VER="$OPTARG"
;;
e)
export EXT_BIN_VER="$OPTARG"
;;
k)
export K8S_BIN_VER="$OPTARG"
;;
m)
export REGISTRY_MIRROR="$OPTARG"
;;
p)
export SYS_PKG_VER="$OPTARG"
;;
z)
export KUBEASZ_VER="$OPTARG"
;;
?)
usage
exit 1
;;
esac
done
[[ "$ACTION" == "" ]] && { echo "[ERROR] illegal option"; usage; exit 1; }
# excute cmd "$ACTION"
echo -e "[INFO] \033[33mAction begin\033[0m : $ACTION"
${ACTION} || { echo -e "[ERROR] \033[31mAction failed\033[0m : $ACTION"; return 1; }
echo -e "[INFO] \033[32mAction successed\033[0m : $ACTION"
}
main "$@"
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