第3关 二进制形式安装K8s高可用生产级集群

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大家好，我是博哥爱运维，下面是这次安装k8s集群相关系统及组件的详细版本号

• Ubuntu 22.04.3 LTS
• k8s: v1.27.5
• containerd: 1.6.23
• etcd: v3.5.9
• coredns: 1.11.1
• calico: v3.24.6

下面是此次虚拟机集群安装前的IP等信息规划(完全模拟一个中小型企业K8S集群)

IP	hostname	role	resource
10.0.1.201	node-1	master/work node	2c/4g(ingress-nginx)
10.0.1.202	node-2	master/work node	2c/4g(harbor)
10.0.1.203	node-3	work node	2c/4g
10.0.1.204	node-4	work node	2c/4g

显然目前为止，前面几关给我们的装备还不太够，我们继续在这一关获取充足的装备弹药，为最终战胜K8s而奋斗吧！

这里采用开源项目https://github.com/easzlab/kubeasz，以二进制安装的方式，符合企业级稳定运行的要求，非常优秀的一个开源项目，亲眼见证了star数从0到现在最新的9.6k的增长过程，版本也在不停地迭代更新，基本是跟着K8S的更新节奏来。

博哥在实际工作中，在全球各区域（国内、北美、欧洲、东南亚），各个主流云厂商（阿里云、华为云、腾讯云、百度云、火山云、移动云、AWS、Google cloud等），均自建过生产K8S集群提供业务服务能力，用的就是这个优秀的K8S安装开源项目，稳定运行时间长的集群有4年左右，期间没出现过大问题很稳定。

部署架构图

安装步骤清单：

1. deploy机器做好对所有k8s node节点的免密登陆操作
2. deploy机器安装好python2版本以及pip，然后安装ansible
3. 对k8s集群配置做一些定制化配置并开始部署

# 需要注意的在线安装因为会从github及dockerhub上下载文件及镜像，有时候访问这些国外网络会非常慢，这里我也会大家准备好了完整离线安装包，下载地址如下，和上面的安装脚本放在同一目录下，再执行上面的安装命令即可
# 此离线安装包里面的k8s版本为v1.27.5
https://cloud.189.cn/web/share?code=Yj6nEv6jQ3Mv（访问码：3pms）

自建k8s集群部署

挂载数据盘

注意： 如无需独立数据盘可忽略此步骤

# 创建下面4个目录
/var/lib/container/{kubelet,docker,nfs_dir}
/nfs_dir

# 不分区直接格式化数据盘，假设数据盘是/dev/vdb
mkfs.ext4 /dev/vdb

# 然后编辑 /etc/fstab，添加如下内容：
/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

# 刷新生效挂载
mount -a

自己编写的k8s安装脚本说明

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

# 安装命令示例（假设我这里root的密码是rootPassword，如已做免密这里的密码可以任意填写；10.0.1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；我们自己的域名是boge.com；要设定k8s集群名称为test）：

# 单台节点部署
bash k8s_install_new.sh rootPassword 10.0.1   201 containerd calico boge.com  test
# 多台节点部署
bash k8s_install_new.sh rootPassword 10.0.1   201\ 202\ 203\ 204 containerd calico boge.com  test

# 注意：如果是在海外部署，而集群名称又不带aws的话，可以把安装脚本内此部分代码注释掉，避免pip安装过慢
if ! `echo $clustername |grep -iwE aws &>/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


# 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

完整部署脚本k8s_install_new.sh

#!/bin/bash
# auther: boge
# 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
#########################################################################

echo "记得先把数据盘挂载弄好，已经弄好直接回车，否则ctrl+c终止脚本.(Remember to mount the data disk first, and press Enter directly, otherwise ctrl+c terminates the script.)"
read -p "" xxxxxx
# 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

注意：ubuntu-22.04.3系统在使用kubeasz-3.6.2离线包进行离线安装时，会报kube-proxy服务启动异常，这是缺少ipset包的原因，正好可以作为安装过程中排错的案例

TASK [kube-node : 轮询等待kube-proxy启动] ***************************************************************
fatal: [10.0.1.203]: FAILED! => {"attempts": 4, "changed": true, "cmd": "systemctl is-active kube-proxy.service", "delta": "0:00:00.005924", "end": "2023-10-17 14:52:50.142647", "msg": "non-zero return code", "rc": 3, "start": "2023-10-17 14:52:50.136723", "stderr": "", "stderr_lines": [], "stdout": "activating", "stdout_lines": ["activating"]}

# 开始在线安装（这里选择容器运行时是docker，CNI为calico,K8S集群名称为test）
# 脚本安装参数依次为：所有服务器的root统一密码、网络位、主机位、容器运行时、K8S网络插件、K8S集群名称
bash k8s_install_new.sh bogeit 10.0.1 201\ 202\ 203\ 204 containerd calico boge.com test-cn


# 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 

安装完K8S集群后，我们部署一个nginx服务来看看服务运行效果吧！

# k8s v1.18 use this command to create deployment and service:
#  kubectl  create deployment nginx --image=nginx:1.21.6
#  kubectl expose deployment nginx --port=80 --target-port=80




---
kind: Service
apiVersion: v1
metadata:
  name: new-nginx
spec:
  selector:
    app: new-nginx
  ports:
    - name: http-port
      port: 80
      protocol: TCP
      targetPort: 80

---
# 新版本k8s的ingress配置
apiVersion: networking.k8s.io/v1
kind: Ingress
metadata:
  name: new-nginx
  annotations:
    nginx.ingress.kubernetes.io/force-ssl-redirect: "true"
    nginx.ingress.kubernetes.io/whitelist-source-range: 0.0.0.0/0
    nginx.ingress.kubernetes.io/configuration-snippet: |
      if ($host != 'www.boge.com' ) {
        rewrite ^ http://www.boge.com$request_uri permanent;
      }
spec:
  rules:
    - host: boge.com
      http:
        paths:
          - backend:
              service:
                name: new-nginx
                port:
                  number: 80
            path: /
            pathType: Prefix
    - host: m.boge.com
      http:
        paths:
          - backend:
              service:
                name: new-nginx
                port:
                  number: 80
            path: /
            pathType: Prefix
    - host: www.boge.com
      http:
        paths:
          - backend:
              service:
                name: new-nginx
                port:
                  number: 80
            path: /
            pathType: Prefix
#  tls:
#      - hosts:
#          - boge.com
#          - m.boge.com
#          - www.boge.com
#        secretName: boge-com-tls

#  kubectl -n  create secret tls boge-com-tls --key boge.key --cert boge.csr

---
apiVersion: apps/v1
kind: Deployment
metadata:
  name: new-nginx
  labels:
    app: new-nginx
spec:
  replicas: 2
  selector:
    matchLabels:
      app: new-nginx
  template:
    metadata:
      labels:
        app: new-nginx
    spec:
      containers:
#--------------------------------------------------
      - name: new-nginx
        image: nginx:1.21.6
#        image: nginx:1.25.1
        env:
          - name: TZ
            value: Asia/Shanghai
        ports:
        - containerPort: 80
        volumeMounts:
          - name: html-files
            mountPath: "/usr/share/nginx/html"
#--------------------------------------------------
      - name: busybox
        image: registry.cn-shanghai.aliyuncs.com/acs/busybox:v1.29.2
#        image: nicolaka/netshoot
        args:
        - /bin/sh
        - -c
        - >
           while :; do
             if [ -f /html/index.html ];then
               echo "[$(date +%F\ %T)] ${MY_POD_NAMESPACE}-${MY_POD_NAME}-${MY_POD_IP}" > /html/index.html
               sleep 1
             else
               touch /html/index.html
             fi
           done
        env:
          - name: TZ
            value: Asia/Shanghai
          - name: MY_POD_NAME
            valueFrom:
              fieldRef:
                apiVersion: v1
                fieldPath: metadata.name
          - name: MY_POD_NAMESPACE
            valueFrom:
              fieldRef:
                apiVersion: v1
                fieldPath: metadata.namespace
          - name: MY_POD_IP
            valueFrom:
              fieldRef:
                apiVersion: v1
                fieldPath: status.podIP
        volumeMounts:
          - name: html-files
            mountPath: "/html"
          - mountPath: /etc/localtime
            name: tz-config

#--------------------------------------------------
      volumes:
        - name: html-files
          emptyDir:
            medium: Memory
            sizeLimit: 10Mi
        - name: tz-config
          hostPath:
            path: /usr/share/zoneinfo/Asia/Shanghai

---

K8S在各个云平台的应用

AWS EKS

GOOGLE GKE

ALIYUN ACK

HUAWEI Cloud CCE

TENCENT Cloud TKE

volcengine Cloud VKE