K8S一键安装脚本
部署脚本调用核心项目github: https://github.com/easzlab/kubeasz ， 此脚本是这个项目的上一层简化二进制部署k8s实施的封装
此脚本安装过的操作系统 CentOS 7, Ubuntu 16.04/18.04/20.04/22.04
注意: k8s 版本 >= 1.24 时，CRI仅支持 containerd
CentOS7.9 安装前需要提前配置好国内的yum源和pip源
Ubuntu22.04 安装前需要提前配置好国内的apt源和pip源
否则需要等待较长时间
配置华为源
wget -O /etc/yum.repos.d/CentOS-Base.repo https://mirrors.huaweicloud.com/repository/conf/CentOS-7-anon.repo
cat > /etc/pip.conf << EOF
[global]
index-url = https://mirrors.huaweicloud.com/repository/pypi/simple
trusted-host = mirrors.huaweicloud.com
timeout = 120
EOF
## Ubuntu22.04的apt源
sudo cp -a /etc/apt/sources.list /etc/apt/sources.list.bak
sudo sed -i "s@http://.*archive.ubuntu.com@http://mirrors.huaweicloud.com@g" /etc/apt/sources.list
sudo sed -i "s@http://.*security.ubuntu.com@http://mirrors.huaweicloud.com@g" /etc/apt/sources.list
k8s安装脚本
# 创建k8s安装脚本，适用CentOS7/Ubuntu22.4
vim k8s_install.sh
#!/bin/bash
# descriptions: the shell scripts will use ansible to deploy K8S at binary for siample
# docker-tag
# curl -s -S "https://registry.hub.docker.com/v2/repositories/easzlab/kubeasz-k8s-bin/tags/" | jq '."results"[]["name"]' |sort -rn
# github: https://github.com/easzlab/kubeasz
#########################################################################
# 此脚本安装过的操作系统 CentOS/RedHat 7, Ubuntu 16.04/18.04/20.04/22.04
#########################################################################
# 传参检测
[ $# -ne 7 ] && echo -e "Usage: $0 rootpasswd netnum nethosts cri cni k8s-cluster-name\nExample: bash $0 rootPassword 10.0.1 201\ 202\ 203\ 204 [containerd|docker] [calico|flannel|cilium] boge.com test-cn\n" && exit 11
# 变量定义
export release=3.6.2 # 支持k8s多版本使用,定义下面k8s_ver变量版本范围: 1.28.1 v1.27.5 v1.26.8 v1.25.13 v1.24.17
export k8s_ver=v1.27.5 # | docker-tag tags easzlab/kubeasz-k8s-bin 注意: k8s 版本 >= 1.24 时，仅支持 containerd
rootpasswd=$1
netnum=$2
nethosts=$3
cri=$4
cni=$5
domainName=$6
clustername=$7
if ls -1v ./kubeasz*.tar.gz &>/dev/null;then software_packet="$(ls -1v ./kubeasz*.tar.gz )";else software_packet="";fi
pwd="/etc/kubeasz"
# deploy机器升级软件库
if cat /etc/redhat-release &>/dev/null;then
yum update -y
else
apt-get update && apt-get upgrade -y && apt-get dist-upgrade -y
[ $? -ne 0 ] && apt-get -yf install
fi
# deploy机器检测python环境
python2 -V &>/dev/null
if [ $? -ne 0 ];then
if cat /etc/redhat-release &>/dev/null;then
yum install gcc openssl-devel bzip2-devel
wget https://www.python.org/ftp/python/2.7.16/Python-2.7.16.tgz
tar xzf Python-2.7.16.tgz
cd Python-2.7.16
./configure --enable-optimizations
make altinstall
ln -s /usr/bin/python2.7 /usr/bin/python
cd -
else
apt-get install -y python2.7 && ln -s /usr/bin/python2.7 /usr/bin/python
fi
fi
python3 -V &>/dev/null
if [ $? -ne 0 ];then
if cat /etc/redhat-release &>/dev/null;then
yum install python3 -y
else
apt-get install -y python3
fi
fi
# deploy机器设置pip安装加速源
if `echo $clustername |grep -iwE cn &>/dev/null`; then
mkdir ~/.pip
cat > ~/.pip/pip.conf <<CB
[global]
index-url = https://mirrors.aliyun.com/pypi/simple
[install]
trusted-host=mirrors.aliyun.com
CB
fi
# deploy机器安装相应软件包
which python || ln -svf `which python2.7` /usr/bin/python
if cat /etc/redhat-release &>/dev/null;then
yum install git epel-release python-pip sshpass -y
[ -f ./get-pip.py ] && python ./get-pip.py || {
wget https://bootstrap.pypa.io/pip/2.7/get-pip.py && python get-pip.py
}
else
if grep -Ew '20.04|22.04' /etc/issue &>/dev/null;then apt-get install sshpass -y;else apt-get install python-pip sshpass -y;fi
[ -f ./get-pip.py ] && python ./get-pip.py || {
wget https://bootstrap.pypa.io/pip/2.7/get-pip.py && python get-pip.py
}
fi
python -m pip install --upgrade "pip < 21.0"
which pip || ln -svf `which pip` /usr/bin/pip
pip -V
pip install setuptools -U
pip install --no-cache-dir ansible netaddr
# 在deploy机器做其他node的ssh免密操作
for host in `echo "${nethosts}"`
do
echo "============ ${netnum}.${host} ===========";
if [[ ${USER} == 'root' ]];then
[ ! -f /${USER}/.ssh/id_rsa ] &&\
ssh-keygen -t rsa -P '' -f /${USER}/.ssh/id_rsa
else
[ ! -f /home/${USER}/.ssh/id_rsa ] &&\
ssh-keygen -t rsa -P '' -f /home/${USER}/.ssh/id_rsa
fi
sshpass -p ${rootpasswd} ssh-copy-id -o StrictHostKeyChecking=no ${USER}@${netnum}.${host}
if cat /etc/redhat-release &>/dev/null;then
ssh -o StrictHostKeyChecking=no ${USER}@${netnum}.${host} "yum update -y"
else
ssh -o StrictHostKeyChecking=no ${USER}@${netnum}.${host} "apt-get update && apt-get upgrade -y && apt-get dist-upgrade -y"
[ $? -ne 0 ] && ssh -o StrictHostKeyChecking=no ${USER}@${netnum}.${host} "apt-get -yf install"
fi
done
# deploy机器下载k8s二进制安装脚本(注：这里下载可能会因网络原因失败，可以多尝试运行该脚本几次)
if [[ ${software_packet} == '' ]];then
if [[ ! -f ./ezdown ]];then
curl -C- -fLO --retry 3 https://github.com/easzlab/kubeasz/releases/download/${release}/ezdown
fi
# 使用工具脚本下载
sed -ri "s+^(K8S_BIN_VER=).*$+\1${k8s_ver}+g" ezdown
chmod +x ./ezdown
# ubuntu_22 to download package of Ubuntu 22.04
./ezdown -D && ./ezdown -P ubuntu_22 && ./ezdown -X
else
tar xvf ${software_packet} -C /etc/
sed -ri "s+^(K8S_BIN_VER=).*$+\1${k8s_ver}+g" ${pwd}/ezdown
chmod +x ${pwd}/{ezctl,ezdown}
chmod +x ./ezdown
./ezdown -D # 离线安装 docker，检查本地文件，正常会提示所有文件已经下载完成，并上传到本地私有镜像仓库
./ezdown -S # 启动 kubeasz 容器
fi
# 初始化一个名为$clustername的k8s集群配置
CLUSTER_NAME="$clustername"
${pwd}/ezctl new ${CLUSTER_NAME}
if [[ $? -ne 0 ]];then
echo "cluster name [${CLUSTER_NAME}] was exist in ${pwd}/clusters/${CLUSTER_NAME}."
exit 1
fi
if [[ ${software_packet} != '' ]];then
# 设置参数，启用离线安装
# 离线安装文档：https://github.com/easzlab/kubeasz/blob/3.6.2/docs/setup/offline_install.md
sed -i 's/^INSTALL_SOURCE.*$/INSTALL_SOURCE: "offline"/g' ${pwd}/clusters/${CLUSTER_NAME}/config.yml
fi
# to check ansible service
ansible all -m ping
#---------------------------------------------------------------------------------------------------
#修改二进制安装脚本配置 config.yml
sed -ri "s+^(CLUSTER_NAME:).*$+\1 \"${CLUSTER_NAME}\"+g" ${pwd}/clusters/${CLUSTER_NAME}/config.yml
## k8s上日志及容器数据存独立磁盘步骤（参考阿里云的）
mkdir -p /var/lib/container/{kubelet,docker,nfs_dir} /var/lib/{kubelet,docker} /nfs_dir
## 不用fdisk分区，直接格式化数据盘 mkfs.ext4 /dev/vdb，按下面添加到fstab后，再mount -a刷新挂载(blkid /dev/sdx)
## cat /etc/fstab
# UUID=105fa8ff-bacd-491f-a6d0-f99865afc3d6 / ext4 defaults 1 1
# /dev/vdb /var/lib/container/ ext4 defaults 0 0
# /var/lib/container/kubelet /var/lib/kubelet none defaults,bind 0 0
# /var/lib/container/docker /var/lib/docker none defaults,bind 0 0
# /var/lib/container/nfs_dir /nfs_dir none defaults,bind 0 0
## tree -L 1 /var/lib/container
# /var/lib/container
# ├── docker
# ├── kubelet
# └── lost+found
# docker data dir
DOCKER_STORAGE_DIR="/var/lib/container/docker"
sed -ri "s+^(STORAGE_DIR:).*$+STORAGE_DIR: \"${DOCKER_STORAGE_DIR}\"+g" ${pwd}/clusters/${CLUSTER_NAME}/config.yml
# containerd data dir
CONTAINERD_STORAGE_DIR="/var/lib/container/containerd"
sed -ri "s+^(STORAGE_DIR:).*$+STORAGE_DIR: \"${CONTAINERD_STORAGE_DIR}\"+g" ${pwd}/clusters/${CLUSTER_NAME}/config.yml
# kubelet logs dir
KUBELET_ROOT_DIR="/var/lib/container/kubelet"
sed -ri "s+^(KUBELET_ROOT_DIR:).*$+KUBELET_ROOT_DIR: \"${KUBELET_ROOT_DIR}\"+g" ${pwd}/clusters/${CLUSTER_NAME}/config.yml
if [[ $clustername != 'aws' ]]; then
# docker aliyun repo
REG_MIRRORS="https://pqbap4ya.mirror.aliyuncs.com"
sed -ri "s+^REG_MIRRORS:.*$+REG_MIRRORS: \'[\"${REG_MIRRORS}\"]\'+g" ${pwd}/clusters/${CLUSTER_NAME}/config.yml
fi
# [docker]信任的HTTP仓库
sed -ri "s+127.0.0.1/8+${netnum}.0/24+g" ${pwd}/clusters/${CLUSTER_NAME}/config.yml
# disable dashboard auto install
sed -ri "s+^(dashboard_install:).*$+\1 \"no\"+g" ${pwd}/clusters/${CLUSTER_NAME}/config.yml
# 融合配置准备(按示例部署命令这里会生成testk8s.boge.com这个域名，部署脚本会基于这个域名签证书，优势是后面访问kube-apiserver，可以基于此域名解析任意IP来访问，灵活性更高)
CLUSEER_WEBSITE="${CLUSTER_NAME}k8s.${domainName}"
lb_num=$(grep -wn '^MASTER_CERT_HOSTS:' ${pwd}/clusters/${CLUSTER_NAME}/config.yml |awk -F: '{print $1}')
lb_num1=$(expr ${lb_num} + 1)
lb_num2=$(expr ${lb_num} + 2)
sed -ri "${lb_num1}s+.*$+ - "${CLUSEER_WEBSITE}"+g" ${pwd}/clusters/${CLUSTER_NAME}/config.yml
sed -ri "${lb_num2}s+(.*)$+#\1+g" ${pwd}/clusters/${CLUSTER_NAME}/config.yml
# node节点最大pod 数
MAX_PODS="120"
sed -ri "s+^(MAX_PODS:).*$+\1 ${MAX_PODS}+g" ${pwd}/clusters/${CLUSTER_NAME}/config.yml
# calico 自建机房都在二层网络可以设置 CALICO_IPV4POOL_IPIP=“off”,以提高网络性能; 公有云上VPC在三层网络，需设置CALICO_IPV4POOL_IPIP: "Always"开启ipip隧道
#sed -ri "s+^(CALICO_IPV4POOL_IPIP:).*$+\1 \"off\"+g" ${pwd}/clusters/${CLUSTER_NAME}/config.yml
# 修改二进制安装脚本配置 hosts
# clean old ip
sed -ri '/192.168.1.1/d' ${pwd}/clusters/${CLUSTER_NAME}/hosts
sed -ri '/192.168.1.2/d' ${pwd}/clusters/${CLUSTER_NAME}/hosts
sed -ri '/192.168.1.3/d' ${pwd}/clusters/${CLUSTER_NAME}/hosts
sed -ri '/192.168.1.4/d' ${pwd}/clusters/${CLUSTER_NAME}/hosts
sed -ri '/192.168.1.5/d' ${pwd}/clusters/${CLUSTER_NAME}/hosts
# 输入准备创建ETCD集群的主机位
echo "enter etcd hosts here (example: 203 202 201) ↓"
read -p "" ipnums
for ipnum in `echo ${ipnums}`
do
echo $netnum.$ipnum
sed -i "/\[etcd/a $netnum.$ipnum" ${pwd}/clusters/${CLUSTER_NAME}/hosts
done
# 输入准备创建KUBE-MASTER集群的主机位
echo "enter kube-master hosts here (example: 202 201) ↓"
read -p "" ipnums
for ipnum in `echo ${ipnums}`
do
echo $netnum.$ipnum
sed -i "/\[kube_master/a $netnum.$ipnum" ${pwd}/clusters/${CLUSTER_NAME}/hosts
done
# 输入准备创建KUBE-NODE集群的主机位
echo "enter kube-node hosts here (example: 204 203) ↓"
read -p "" ipnums
for ipnum in `echo ${ipnums}`
do
echo $netnum.$ipnum
sed -i "/\[kube_node/a $netnum.$ipnum" ${pwd}/clusters/${CLUSTER_NAME}/hosts
done
# 配置容器运行时CNI
case ${cni} in
flannel)
sed -ri "s+^CLUSTER_NETWORK=.*$+CLUSTER_NETWORK=\"${cni}\"+g" ${pwd}/clusters/${CLUSTER_NAME}/hosts
;;
calico)
sed -ri "s+^CLUSTER_NETWORK=.*$+CLUSTER_NETWORK=\"${cni}\"+g" ${pwd}/clusters/${CLUSTER_NAME}/hosts
;;
cilium)
sed -ri "s+^CLUSTER_NETWORK=.*$+CLUSTER_NETWORK=\"${cni}\"+g" ${pwd}/clusters/${CLUSTER_NAME}/hosts
;;
*)
echo "cni need be flannel or calico or cilium."
exit 11
esac
# 配置K8S的ETCD数据备份的定时任务
# https://github.com/easzlab/kubeasz/blob/master/docs/op/cluster_restore.md
if cat /etc/redhat-release &>/dev/null;then
if ! grep -w '94.backup.yml' /var/spool/cron/root &>/dev/null;then echo "00 00 * * * /usr/local/bin/ansible-playbook -i /etc/kubeasz/clusters/${CLUSTER_NAME}/hosts -e @/etc/kubeasz/clusters/${CLUSTER_NAME}/config.yml /etc/kubeasz/playbooks/94.backup.yml &> /dev/null; find /etc/kubeasz/clusters/${CLUSTER_NAME}/backup/ -type f -name '*.db' -mtime +3|xargs rm -f" >> /var/spool/cron/root;else echo exists ;fi
chown root.crontab /var/spool/cron/root
chmod 600 /var/spool/cron/root
rm -f /var/run/cron.reboot
service crond restart
else
if ! grep -w '94.backup.yml' /var/spool/cron/crontabs/root &>/dev/null;then echo "00 00 * * * /usr/local/bin/ansible-playbook -i /etc/kubeasz/clusters/${CLUSTER_NAME}/hosts -e @/etc/kubeasz/clusters/${CLUSTER_NAME}/config.yml /etc/kubeasz/playbooks/94.backup.yml &> /dev/null; find /etc/kubeasz/clusters/${CLUSTER_NAME}/backup/ -type f -name '*.db' -mtime +3|xargs rm -f" >> /var/spool/cron/crontabs/root;else echo exists ;fi
chown root.crontab /var/spool/cron/crontabs/root
chmod 600 /var/spool/cron/crontabs/root
rm -f /var/run/crond.reboot
service cron restart
fi
#---------------------------------------------------------------------------------------------------
# 准备开始安装了
rm -rf ${pwd}/{dockerfiles,docs,.gitignore,pics,dockerfiles} &&\
find ${pwd}/ -name '*.md'|xargs rm -f
read -p "Enter to continue deploy k8s to all nodes >>>" YesNobbb
# now start deploy k8s cluster
cd ${pwd}/
# to prepare CA/certs & kubeconfig & other system settings
${pwd}/ezctl setup ${CLUSTER_NAME} 01
sleep 1
# to setup the etcd cluster
${pwd}/ezctl setup ${CLUSTER_NAME} 02
sleep 1
# to setup the container runtime(docker or containerd)
case ${cri} in
containerd)
sed -ri "s+^CONTAINER_RUNTIME=.*$+CONTAINER_RUNTIME=\"${cri}\"+g" ${pwd}/clusters/${CLUSTER_NAME}/hosts
${pwd}/ezctl setup ${CLUSTER_NAME} 03
;;
docker)
sed -ri "s+^CONTAINER_RUNTIME=.*$+CONTAINER_RUNTIME=\"${cri}\"+g" ${pwd}/clusters/${CLUSTER_NAME}/hosts
${pwd}/ezctl setup ${CLUSTER_NAME} 03
;;
*)
echo "cri need be containerd or docker."
exit 11
esac
sleep 1
# to setup the master nodes
${pwd}/ezctl setup ${CLUSTER_NAME} 04
sleep 1
# to setup the worker nodes
${pwd}/ezctl setup ${CLUSTER_NAME} 05
sleep 1
# to setup the network plugin(flannel、calico...)
${pwd}/ezctl setup ${CLUSTER_NAME} 06
sleep 1
# to setup other useful plugins(metrics-server、coredns...)
${pwd}/ezctl setup ${CLUSTER_NAME} 07
sleep 1
# [可选]对集群所有节点进行操作系统层面的安全加固 https://github.com/dev-sec/ansible-os-hardening
#ansible-playbook roles/os-harden/os-harden.yml
#sleep 1
#cd `dirname ${software_packet:-/tmp}`
k8s_bin_path='/opt/kube/bin'
echo "------------------------- k8s version list ---------------------------"
${k8s_bin_path}/kubectl version
echo
echo "------------------------- All Healthy status check -------------------"
${k8s_bin_path}/kubectl get componentstatus
echo
echo "------------------------- k8s cluster info list ----------------------"
${k8s_bin_path}/kubectl cluster-info
echo
echo "------------------------- k8s all nodes list -------------------------"
${k8s_bin_path}/kubectl get node -o wide
echo
echo "------------------------- k8s all-namespaces's pods list ------------"
${k8s_bin_path}/kubectl get pod --all-namespaces
echo
echo "------------------------- k8s all-namespaces's service network ------"
${k8s_bin_path}/kubectl get svc --all-namespaces
echo
echo "------------------------- k8s welcome for you -----------------------"
echo
# you can use k alias kubectl to siample
echo "alias k=kubectl && complete -F __start_kubectl k" >> ~/.bashrc
# get dashboard url
${k8s_bin_path}/kubectl cluster-info|grep dashboard|awk '{print $NF}'|tee -a /root/k8s_results
# get login token
${k8s_bin_path}/kubectl -n kube-system describe secret $(${k8s_bin_path}/kubectl -n kube-system get secret | grep admin-user | awk '{print $1}')|grep 'token:'|awk '{print $NF}'|tee -a /root/k8s_results
echo
echo "you can look again dashboard and token info at >>> /root/k8s_results <<<"
echo ">>>>>>>>>>>>>>>>> You need to excute command [ reboot ] to restart all nodes <<<<<<<<<<<<<<<<<<<<"
#find / -type f -name "kubeasz*.tar.gz" -o -name "k8s_install_new.sh"|xargs rm -f
运行脚本参数案例
# 安装命令示例（假设我这里root的密码是root123；192.168.8 为内网网段；后面的依次是主机位；CRI容器运行时；CNI网络插件；域名是yun4；要设定k8s集群名称为test）：
# 单台节点部署
# bash k8s_install.sh root123 192.168.8 201 containerd calico test
# 多台节点部署例如：192.168.8.[201\202\203\204]四台机器
bash k8s_install.sh root123 192.168.8 201\ 202\ 203\ 204 containerd calico yun4 test
# 直接执行上面的命令为在线安装，如需在离线环境部署，可自己在本地虚拟机安装一遍，然后将/etc/kubeasz目录打包成kubeasz.tar.gz，在无网络的机器上安装，把脚本和这个压缩包放一起再执行上面这行命令即是离线安装了
# 脚本基本是自动化的，除了下面几处提示按要求复制粘贴下，再回车即可
# 输入准备创建ETCD集群的主机位，复制 203 202 201 粘贴并回车
echo "enter etcd hosts here (example: 203 202 201) ↓"
# 输入准备创建KUBE-MASTER集群的主机位，复制 202 201 粘贴并回车
echo "enter kube-master hosts here (example: 202 201) ↓"
# 输入准备创建KUBE-NODE集群的主机位，复制 204 203 粘贴并回车
echo "enter kube-node hosts here (example: 204 203) ↓"
# 这里会提示你是否继续安装，没问题的话直接回车即可
Enter to continue deploy k8s to all nodes >>>
# 安装完成后重新加载下环境变量以实现kubectl命令补齐
. ~/.bashrc
# 获取node节点，master会出现SchedulingDisabled
[root@k8s-master01 ~]# kubectl get node
NAME STATUS ROLES AGE VERSION
192.168.8.201 Ready,SchedulingDisabled master 9m42s v1.27.5
192.168.8.202 Ready,SchedulingDisabled master 9m42s v1.27.5
192.168.8.203 Ready node 7m31s v1.27.5
192.168.8.204 Ready node 7m31s v1.27.5
# SchedulingDisabled，是因为节点被隔离，需要uncordon节点
[root@k8s-master01 ~]# systemctl stop kube-apiserver
[root@k8s-master01 ~]# systemctl start kube-apiserver
[root@k8s-master01 ~]# systemctl restart kubelet
[root@k8s-master01 ~]# kubectl uncordon 192.168.8.201
node/192.168.8.100 uncordoned
[root@k8s-master01 ~]# kubectl uncordon 192.168.8.202
node/192.168.8.101 uncordoned
[root@k8s-master01 ~]# kubectl get node
NAME STATUS ROLES AGE VERSION
192.168.8.201 Ready master 11m v1.27.5
192.168.8.202 Ready master 11m v1.27.5
192.168.8.203 Ready node 9m44s v1.27.5
192.168.8.204 Ready node 9m44s v1.27.5