本文主要是介绍kubeasz部署k8s集群，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
1.添加主机名
sudo hostnamectl set-hostname node1cat >> /etc/hosts <<EOF
10.0.0.220 node1
10.0.0.221 node2
10.0.0.222 node3
10.0.0.223 node4
10.0.0.224 node5
EOF
2.优化系统参数
#开启粘贴模式 set paste
#root的密码 xuexi123
#!/bin/bash
# http://releases.ubuntu.com/jammy/# Control switch
#[[ "$1" != "" ]] && iptables_yn="$1" || iptables_yn='n'
iptables_yn="${1:-n}"# install ssh and configure
apt-get install openssh-server -y
echo 'PermitRootLogin yes' >> /etc/ssh/sshd_config
echo 'root:xuexi123'|chpasswd
systemctl restart sshd && systemctl status ssh -l --no-pager# Change apt-get source list
# https://opsx.alibaba.com/mirror
ubuntuCodename=$(lsb_release -a 2>/dev/null|awk 'END{print $NF}')
\cp /etc/apt/sources.list{,_bak}
#sed -ri "s+archive.ubuntu.com+mirrors.aliyun.com+g" /etc/apt/sources.list# https://developer.aliyun.com/mirror/ubuntu?spm=a2c6h.13651102.0.0.3e221b11ev6YG5
# ubuntu 22.04: jammy
# ubuntu 20.04: focal
# ubuntu 18.04: bionic
# ubuntu 16.04: xenialecho "
deb https://mirrors.aliyun.com/ubuntu/ ${ubuntuCodename} main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ ${ubuntuCodename} main restricted universe multiversedeb https://mirrors.aliyun.com/ubuntu/ ${ubuntuCodename}-security main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ ${ubuntuCodename}-security main restricted universe multiversedeb https://mirrors.aliyun.com/ubuntu/ ${ubuntuCodename}-updates main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ ${ubuntuCodename}-updates main restricted universe multiversedeb https://mirrors.aliyun.com/ubuntu/ ${ubuntuCodename}-backports main restricted universe multiverse
deb-src https://mirrors.aliyun.com/ubuntu/ ${ubuntuCodename}-backports main restricted universe multiverse" > /etc/apt/sources.listapt-get update# Install package
pkgList="curl wget unzip gcc swig automake make perl cpio git libmbedtls-dev libudns-dev libev-dev python-pip python3-pip lrzsz iftop nethogs nload htop ifstat iotop iostat vim" &&\
for Package in ${pkgList}; do apt-get -y install $Package;done
apt-get clean all# Custom profile
cat > /etc/profile.d/boge.sh << EOF
HISTSIZE=10000
HISTTIMEFORMAT="%F %T \$(whoami) "alias l='ls -AFhlt --color=auto'
alias lh='l | head'
alias ll='ls -l --color=auto'
alias ls='ls --color=auto'
alias vi=vimGREP_OPTIONS="--color=auto"
alias grep='grep --color'
alias egrep='egrep --color'
alias fgrep='fgrep --color'
EOFsed -i 's@^"syntax on@syntax on@' /etc/vim/vimrc# PS1
[ -z "$(grep ^PS1 ~/.bashrc)" ] && echo "PS1='\${debian_chroot:+(\$debian_chroot)}\\[\\e[1;32m\\]\\u@\\h\\[\\033[00m\\]:\\[\\033[01;34m\\]\\w\\[\\033[00m\\]\\$ '" >> ~/.bashrc# history
[ -z "$(grep history-timestamp ~/.bashrc)" ] && echo "PROMPT_COMMAND='{ msg=\$(history 1 | { read x y; echo \$y; });user=\$(whoami); echo \$(date \"+%Y-%m-%d %H:%M:%S\"):\$user:\`pwd\`/:\$msg ---- \$(who am i); } >> /tmp/\`hostname\`.\`whoami\`.history-timestamp'" >> ~/.bashrc# /etc/security/limits.conf
[ -e /etc/security/limits.d/*nproc.conf ] && rename nproc.conf nproc.conf_bk /etc/security/limits.d/*nproc.conf
[ -z "$(grep 'session required pam_limits.so' /etc/pam.d/common-session)" ] && echo "session required pam_limits.so" >> /etc/pam.d/common-session
sed -i '/^# End of file/,$d' /etc/security/limits.conf
cat >> /etc/security/limits.conf <<EOF
# End of file
* soft nproc 1000000
* hard nproc 1000000
* soft nofile 1000000
* hard nofile 1000000
root soft nproc 1000000
root hard nproc 1000000
root soft nofile 1000000
root hard nofile 1000000
EOFulimit -SHn 1000000# /etc/hosts
[ "$(hostname -i | awk '{print $1}')" != "127.0.0.1" ] && sed -i "s@127.0.0.1.*localhost@&\n127.0.0.1 $(hostname)@g" /etc/hosts# Set timezone
rm -rf /etc/localtime
ln -s /usr/share/zoneinfo/Asia/Shanghai /etc/localtime# /etc/sysctl.conf
:<<BOGE
fs.file-max = 1000000
这个参数定义了系统中最大的文件句柄数。文件句柄是用于访问文件的数据结构。增加这个值可以提高系统同时打开文件的能力。fs.inotify.max_user_instances = 8192
inotify是Linux内核中的一个机制，用于监视文件系统事件。这个参数定义了每个用户可以创建的inotify实例的最大数量。net.ipv4.tcp_syncookies = 1
当系统遭受SYN洪水攻击时，启用syncookies可以防止系统资源被耗尽。SYN cookies是一种机制，用于在TCP三次握手中保护服务器端资源。net.ipv4.tcp_fin_timeout = 30
这个参数定义了TCP连接中，等待关闭的时间。当一端发送FIN信号后，等待对端关闭连接的超时时间。net.ipv4.tcp_tw_reuse = 1
启用该参数后，可以允许将TIME-WAIT状态的TCP连接重新用于新的连接。这可以减少系统中TIME-WAIT连接的数量。net.ipv4.ip_local_port_range = 1024 65000
这个参数定义了本地端口的范围，用于分配给发送请求的应用程序。它限制了可用于客户端连接的本地端口范围。net.ipv4.tcp_max_syn_backlog = 16384
这个参数定义了TCP连接请求的队列长度。当系统处理不及时时，超过该队列长度的连接请求将被拒绝。net.ipv4.tcp_max_tw_buckets = 6000
这个参数定义了系统同时保持TIME-WAIT状态的最大数量。超过这个数量的连接将被立即关闭。net.ipv4.route.gc_timeout = 100
这个参数定义了内核路由表清理的时间间隔，单位是秒。它影响路由缓存的生命周期。net.ipv4.tcp_syn_retries = 1
这个参数定义了在发送SYN请求后，等待对端回应的次数。超过指定次数后仍未响应，连接将被认为失败。net.ipv4.tcp_synack_retries = 1
这个参数定义了在发送SYN+ACK回应后，等待对端发送ACK的次数。超过指定次数后仍未收到ACK，连接将被认为失败。net.core.somaxconn = 32768
这个参数定义了监听队列的最大长度。当服务器正在处理的连接数超过此值时，新的连接请求将被拒绝。net.core.netdev_max_backlog = 32768
这个参数定义了网络设备接收队列的最大长度。当接收队列已满时，新的数据包将被丢弃。net.core.netdev_budget = 5000
这个参数定义了每个网络设备接收队列在每个时间间隔中可以处理的数据包数量。net.ipv4.tcp_timestamps = 0
禁用TCP时间戳。时间戳可以用于解决网络中的数据包乱序问题，但在高负载环境下可能会增加开销。net.ipv4.tcp_max_orphans = 32768
这个参数定义了系统中允许存在的最大孤立（没有关联的父连接）TCP连接数量。超过这个数量的孤立连接将被立即关闭。
BOGE[ -z "$(grep 'fs.file-max' /etc/sysctl.conf)" ] && cat >> /etc/sysctl.conf << EOF
fs.file-max = 1000000
fs.inotify.max_user_instances = 8192
net.ipv4.tcp_syncookies = 1
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_tw_reuse = 1
net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.tcp_max_syn_backlog = 16384
net.ipv4.tcp_max_tw_buckets = 6000
net.ipv4.route.gc_timeout = 100
net.ipv4.tcp_syn_retries = 1
net.ipv4.tcp_synack_retries = 1
net.core.somaxconn = 32768
net.core.netdev_max_backlog = 32768
net.core.netdev_budget = 5000
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_max_orphans = 32768
EOF
sysctl -p# Normal display of Chinese in the text
apt-get -y install localesecho 'export LANG=en_US.UTF-8'|tee -a /etc/profile && source /etc/profilesed -i 's@^ACTIVE_CONSOLES.*@ACTIVE_CONSOLES="/dev/tty[1-2]"@' /etc/default/console-setup
#sed -i 's@^@#@g' /etc/init/tty[3-6].conf
locale-gen en_US.UTF-8
echo "en_US.UTF-8 UTF-8" > /var/lib/locales/supported.d/local
cat > /etc/default/locale << EOF
LANG=en_US.UTF-8
LANGUAGE=en_US:en
EOF
#sed -i 's@^@#@g' /etc/init/control-alt-delete.conf# Update time
which ntpdate || apt-get update;apt install ntpdate
ntpdate pool.ntp.org
[ ! -e "/var/spool/cron/crontabs/root" -o -z "$(grep ntpdate /var/spool/cron/crontabs/root 2>/dev/null)" ] && { echo "*/20 * * * * $(which ntpdate) pool.ntp.org > /dev/null 2>&1" >> /var/spool/cron/crontabs/root;chmod 600 /var/spool/cron/crontabs/root; }# iptables
if [ "${iptables_yn}" == 'y' ]; thenapt-get -y install debconf-utilsecho iptables-persistent iptables-persistent/autosave_v4 boolean true | sudo debconf-set-selectionsecho iptables-persistent iptables-persistent/autosave_v6 boolean true | sudo debconf-set-selectionsapt-get -y install iptables-persistentif [ -e "/etc/iptables/rules.v4" ] && [ -n "$(grep '^:INPUT DROP' /etc/iptables/rules.v4)" -a -n "$(grep 'NEW -m tcp --dport 22 -j ACCEPT' /etc/iptables/rules.v4)" -a -n "$(grep 'NEW -m tcp --dport 80 -j ACCEPT' /etc/iptables/rules.v4)" ]; thenIPTABLES_STATUS=yeselseIPTABLES_STATUS=nofiif [ "${IPTABLES_STATUS}" == "no" ]; thencat > /etc/iptables/rules.v4 << EOF
# Firewall configuration written by system-config-securitylevel
# Manual customization of this file is not recommended.
*filter
:INPUT DROP [0:0]
:FORWARD ACCEPT [0:0]
:OUTPUT ACCEPT [0:0]
:syn-flood - [0:0]
-A INPUT -i lo -j ACCEPT
-A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 22 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 80 -j ACCEPT
-A INPUT -p tcp -m state --state NEW -m tcp --dport 443 -j ACCEPT
-A INPUT -p icmp -m icmp --icmp-type 8 -j ACCEPT
COMMIT
EOFfiFW_PORT_FLAG=$(grep -ow "dport ${ssh_port}" /etc/iptables/rules.v4)[ -z "${FW_PORT_FLAG}" -a "${ssh_port}" != "22" ] && sed -i "s@dport 22 -j ACCEPT@&\n-A INPUT -p tcp -m state --state NEW -m tcp --dport ${ssh_port} -j ACCEPT@" /etc/iptables/rules.v4iptables-restore < /etc/iptables/rules.v4/bin/cp /etc/iptables/rules.v{4,6}sed -i 's@icmp@icmpv6@g' /etc/iptables/rules.v6ip6tables-restore < /etc/iptables/rules.v6ip6tables-save > /etc/iptables/rules.v6
fi
service rsyslog restart
service ssh restart. /etc/profile
. ~/.bashrc# set ip and dns
validate_ip() {local ip_var_name=$1while true; doread -p "Input IP address($ip_var_name): " $ip_var_name# 检测是否为空if [ -z "${!ip_var_name}" ]; thenecho "Input is empty. Please try again."continuefi# 检测是否符合IP地址的格式if ! [[ ${!ip_var_name} =~ ^([0-9]{1,3}\.){3}[0-9]{1,3}$ ]]; thenecho "Invalid IP address format. Please try again."continuefi# 输入符合要求，跳出循环breakdone
}# 调用函数并传递变量名作为参数
validate_ip "ip_address"
echo "IP address: $ip_address"validate_ip "ip_gateway"
echo "IP gateway: $ip_gateway"validate_ip "dns1_ip"
echo "Dns1 ip: $dns1_ip"validate_ip "dns2_ip"
echo "Dns2 ip: $dns2_ip"cat > /etc/netplan/00-installer-config.yaml << EOF
network:version: 2renderer: networkdethernets:ens32:dhcp4: falsedhcp6: falseaddresses:- ${ip_address}/24routes:- to: defaultvia: ${ip_gateway}nameservers:addresses: [${dns1_ip}, ${dns2_ip}]
EOFapt install resolvconf -ycat > /etc/resolvconf/resolv.conf.d/head << EOF
nameserver ${dns1_ip}
nameserver ${dns2_ip}
EOFsystemctl restart resolvconfecho "过个10秒左右的样子可以关闭终端，然后换成刚才输入的主机IP进行ssh登陆即可."
netplan apply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-cn
# 多台节点部署
bash k8s_install_new.sh rootPassword 10.0.1 201\ 202\ 203\ 204 containerd calico boge.com test-cn# 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.comCB
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
3.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;thenyum update -y
elseapt-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 ];thenif cat /etc/redhat-release &>/dev/null;thenyum install gcc openssl-devel bzip2-devel wget https://www.python.org/ftp/python/2.7.16/Python-2.7.16.tgztar xzf Python-2.7.16.tgzcd Python-2.7.16./configure --enable-optimizationsmake altinstallln -s /usr/bin/python2.7 /usr/bin/pythoncd -elseapt-get install -y python2.7 && ln -s /usr/bin/python2.7 /usr/bin/pythonfi
fipython3 -V &>/dev/null
if [ $? -ne 0 ];thenif cat /etc/redhat-release &>/dev/null;thenyum install python3 -yelseapt-get install -y python3fi
fi# deploy机器设置pip安装加速源
if `echo $clustername |grep -iwE cn &>/dev/null`; then
mkdir ~/.pip
cat > ~/.pip/pip.conf <<CB
[global]
index-url = https://mirrors.aliyun.com/pypi/simple
[install]
trusted-host=mirrors.aliyun.comCB
fi# deploy机器安装相应软件包
which python || ln -svf `which python2.7` /usr/bin/pythonif cat /etc/redhat-release &>/dev/null;thenyum install git epel-release python-pip sshpass -y[ -f ./get-pip.py ] && python ./get-pip.py || {wget https://bootstrap.pypa.io/pip/2.7/get-pip.py && python get-pip.py}
elseif grep -Ew '20.04|22.04' /etc/issue &>/dev/null;then apt-get install sshpass -y;else apt-get install python-pip sshpass -y;fi[ -f ./get-pip.py ] && python ./get-pip.py || {wget https://bootstrap.pypa.io/pip/2.7/get-pip.py && python get-pip.py}
fi
python -m pip install --upgrade "pip < 21.0"which pip || ln -svf `which pip` /usr/bin/pippip -V
pip install setuptools -U
pip install --no-cache-dir ansible netaddr# 在deploy机器做其他node的ssh免密操作
for host in `echo "${nethosts}"`
doecho "============ ${netnum}.${host} ===========";if [[ ${USER} == 'root' ]];then[ ! -f /${USER}/.ssh/id_rsa ] &&\ssh-keygen -t rsa -P '' -f /${USER}/.ssh/id_rsaelse[ ! -f /home/${USER}/.ssh/id_rsa ] &&\ssh-keygen -t rsa -P '' -f /home/${USER}/.ssh/id_rsafisshpass -p ${rootpasswd} ssh-copy-id -o StrictHostKeyChecking=no ${USER}@${netnum}.${host}if cat /etc/redhat-release &>/dev/null;thenssh -o StrictHostKeyChecking=no ${USER}@${netnum}.${host} "yum update -y"elsessh -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 [[ ${software_packet} == '' ]];thenif [[ ! -f ./ezdown ]];thencurl -C- -fLO --retry 3 https://github.com/easzlab/kubeasz/releases/download/${release}/ezdownfi# 使用工具脚本下载sed -ri "s+^(K8S_BIN_VER=).*$+\1${k8s_ver}+g" ezdownchmod +x ./ezdown# ubuntu_22 to download package of Ubuntu 22.04./ezdown -D && ./ezdown -P ubuntu_22 && ./ezdown -X
elsetar xvf ${software_packet} -C /etc/sed -ri "s+^(K8S_BIN_VER=).*$+\1${k8s_ver}+g" ${pwd}/ezdownchmod +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 [[ $? -ne 0 ]];thenecho "cluster name [${CLUSTER_NAME}] was exist in ${pwd}/clusters/${CLUSTER_NAME}."exit 1
fiif [[ ${software_packet} != '' ]];then# 设置参数，启用离线安装# 离线安装文档：https://github.com/easzlab/kubeasz/blob/3.6.2/docs/setup/offline_install.mdsed -i 's/^INSTALL_SOURCE.*$/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.ymlsed -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 [[ $clustername != 'aws' ]]; then# docker aliyun repoREG_MIRRORS="https://pqbap4ya.mirror.aliyuncs.com"sed -ri "s+^REG_MIRRORS:.*$+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}`
doecho $netnum.$ipnumsed -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}`
doecho $netnum.$ipnumsed -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}`
doecho $netnum.$ipnumsed -i "/\[kube_node/a $netnum.$ipnum" ${pwd}/clusters/${CLUSTER_NAME}/hosts
done# 配置容器运行时CNI
case ${cni} inflannel)sed -ri "s+^CLUSTER_NETWORK=.*$+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;thenif ! 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/${CLUSTER_NAME}/backup/ -type f -name '*.db' -mtime +3|xargs rm -f" >> /var/spool/cron/root;else echo exists ;fichown root.crontab /var/spool/cron/rootchmod 600 /var/spool/cron/rootrm -f /var/run/cron.rebootservice crond restart
elseif ! grep -w '94.backup.yml' /var/spool/cron/crontabs/root &>/dev/null;then echo "00 00 * * * /usr/local/bin/ansible-playbook -i /etc/kubeasz/clusters/${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 ;fichown root.crontab /var/spool/cron/crontabs/rootchmod 600 /var/spool/cron/crontabs/rootrm -f /var/run/crond.rebootservice 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 ${cri} incontainerd)sed -ri "s+^CONTAINER_RUNTIME=.*$+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 -f4.检查集群etcd
kubectl get nodekubectl get po -A#获取节点的状态信息。输出结果会以表格方式展示每个节点的状态
etcdctl --endpoints=https://10.0.0.220:2379,\
https://10.0.0.221:2379,\
https://10.0.0.222:2379 \
--cacert=/etc/kubernetes/ssl/ca.pem \
--cert=/etc/kubernetes/ssl/etcd.pem \
--key=/etc/kubernetes/ssl/etcd-key.pem \
--write-out=table endpoint status#加上endpoint health选项，表示要检查etcd集群的健康状态
etcdctl --endpoints=https://10.0.0.220:2379,\
https://10.0.0.221:2379,\
https://10.0.0.222:2379 \
--cacert=/etc/kubernetes/ssl/ca.pem \
--cert=/etc/kubernetes/ssl/etcd.pem \
--key=/etc/kubernetes/ssl/etcd-key.pem \
endpoint health --write-out=table
5.扩容集群
#帮助
root@node1:/etc/kubeasz# /etc/kubeasz/ezctl -h
Usage: ezctl COMMAND [args]
-------------------------------------------------------------------------------------
Cluster setups:list to list all of the managed clusterscheckout <cluster> to switch default kubeconfig of the clusternew <cluster> to start a new k8s deploy with name 'cluster'setup <cluster> <step> to setup a cluster, also supporting a step-by-step waystart <cluster> to start all of the k8s services stopped by 'ezctl stop'stop <cluster> to stop all of the k8s services temporarilyupgrade <cluster> to upgrade the k8s clusterdestroy <cluster> to destroy the k8s clusterbackup <cluster> to backup the cluster state (etcd snapshot)restore <cluster> to restore the cluster state from backupsstart-aio to quickly setup an all-in-one cluster with default settingsCluster ops:add-etcd <cluster> <ip> to add a etcd-node to the etcd clusteradd-master <cluster> <ip> to add a master node to the k8s clusteradd-node <cluster> <ip> to add a work node to the k8s clusterdel-etcd <cluster> <ip> to delete a etcd-node from the etcd clusterdel-master <cluster> <ip> to delete a master node from the k8s clusterdel-node <cluster> <ip> to delete a work node from the k8s clusterExtra operation:kca-renew <cluster> to force renew CA certs and all the other certs (with caution)kcfg-adm <cluster> <args> to manage client kubeconfig of the k8s clusterUse "ezctl help <command>" for more information about a given command.#######################################################################################################################添加节点
/etc/kubeasz/ezctl add-node test-cn 10.0.0.224#删除节点
/etc/kubeasz/ezctl del-node test-cn 10.0.0.223#在添加节点
/etc/kubeasz/ezctl del-node test-cn 10.0.0.223#报错（解决:删除/etc/kubeasz/clusters/test-cn/hosts 文件中的 [kube_node]下面的10.0.0.223）
root@node1:/etc/kubeasz/clusters/test-cn# /etc/kubeasz/ezctl add-node test-cn 10.0.0.223
10.0.0.223
2024-02-18 16:02:46 ERROR node 10.0.0.223 already existed in /etc/kubeasz/clusters/test-cn/hosts
站在巨人的肩膀上，少走弯路
参考博客：https://blog.csdn.net/weixin_46887489?type=blog
采用开源项目https://github.com/easzlab/kubeasz
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