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kainstall-centos.sh
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kainstall-centos.sh
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#!/usr/bin/env bash
###################################################################
#Script Name : kainstall-centos.sh
#Description : Install kubernetes cluster using kubeadm.
#Create Date : 2020-09-17
#Author : lework
#Email : lework@yeah.net
###################################################################
[[ -n $DEBUG ]] && set -x
set -o errtrace # Make sure any error trap is inherited
set -o nounset # Disallow expansion of unset variables
set -o pipefail # Use last non-zero exit code in a pipeline
######################################################################################################
# environment configuration
######################################################################################################
# 版本
KUBE_VERSION="${KUBE_VERSION:-latest}"
FLANNEL_VERSION="${FLANNEL_VERSION:-0.24.0}"
METRICS_SERVER_VERSION="${METRICS_SERVER_VERSION:-0.6.4}"
INGRESS_NGINX="${INGRESS_NGINX:-1.9.5}"
TRAEFIK_VERSION="${TRAEFIK_VERSION:-2.10.7}"
CALICO_VERSION="${CALICO_VERSION:-3.27.0}"
CILIUM_VERSION="${CILIUM_VERSION:-1.14.5}"
KUBE_PROMETHEUS_VERSION="${KUBE_PROMETHEUS_VERSION:-0.13.0}"
ELASTICSEARCH_VERSION="${ELASTICSEARCH_VERSION:-8.11.3}"
ROOK_VERSION="${ROOK_VERSION:-1.9.13}"
LONGHORN_VERSION="${LONGHORN_VERSION:-1.5.3}"
KUBERNETES_DASHBOARD_VERSION="${KUBERNETES_DASHBOARD_VERSION:-2.7.0}"
KUBESPHERE_VERSION="${KUBESPHERE_VERSION:-3.3.2}"
# 集群配置
KUBE_DNSDOMAIN="${KUBE_DNSDOMAIN:-cluster.local}"
KUBE_APISERVER="${KUBE_APISERVER:-apiserver.$KUBE_DNSDOMAIN}"
KUBE_POD_SUBNET="${KUBE_POD_SUBNET:-10.244.0.0/16}"
KUBE_SERVICE_SUBNET="${KUBE_SERVICE_SUBNET:-10.96.0.0/16}"
KUBE_IMAGE_REPO="${KUBE_IMAGE_REPO:-registry.cn-hangzhou.aliyuncs.com/kainstall}"
KUBE_NETWORK="${KUBE_NETWORK:-flannel}"
KUBE_INGRESS="${KUBE_INGRESS:-nginx}"
KUBE_MONITOR="${KUBE_MONITOR:-prometheus}"
KUBE_STORAGE="${KUBE_STORAGE:-rook}"
KUBE_LOG="${KUBE_LOG:-elasticsearch}"
KUBE_UI="${KUBE_UI:-dashboard}"
KUBE_ADDON="${KUBE_ADDON:-metrics-server}"
KUBE_FLANNEL_TYPE="${KUBE_FLANNEL_TYPE:-vxlan}"
KUBE_CRI="${KUBE_CRI:-containerd}"
KUBE_CRI_VERSION="${KUBE_CRI_VERSION:-latest}"
KUBE_CRI_ENDPOINT="${KUBE_CRI_ENDPOINT:-unix:///run/containerd/containerd.sock}"
# 定义的master和worker节点地址，以逗号分隔
MASTER_NODES="${MASTER_NODES:-}"
WORKER_NODES="${WORKER_NODES:-}"
# 定义在哪个节点上进行设置
MGMT_NODE="${MGMT_NODE:-127.0.0.1}"
# 节点的连接信息
SSH_USER="${SSH_USER:-root}"
SSH_PASSWORD="${SSH_PASSWORD:-}"
SSH_PRIVATE_KEY="${SSH_PRIVATE_KEY:-}"
SSH_PORT="${SSH_PORT:-22}"
SUDO_USER="${SUDO_USER:-root}"
# 节点设置
HOSTNAME_PREFIX="${HOSTNAME_PREFIX:-k8s}"
# 脚本设置
TMP_DIR="$(rm -rf /tmp/kainstall* && mktemp -d -t kainstall.XXXXXXXXXX)"
LOG_FILE="${TMP_DIR}/kainstall.log"
SSH_OPTIONS="-o ConnectTimeout=600 -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null"
ERROR_INFO="\n\033[31mERROR Summary: \033[0m\n "
ACCESS_INFO="\n\033[32mACCESS Summary: \033[0m\n "
COMMAND_OUTPUT=""
SCRIPT_PARAMETER="$*"
OFFLINE_DIR="/tmp/kainstall-offline-file/"
OFFLINE_FILE=""
OS_SUPPORT="centos7 centos8"
GITHUB_PROXY="${GITHUB_PROXY:-https://mirror.ghproxy.com/}"
GCR_PROXY="${GCR_PROXY:-k8sgcr.lework.workers.dev}"
SKIP_UPGRADE_PLAN=${SKIP_UPGRADE_PLAN:-false}
SKIP_SET_OS_REPO=${SKIP_SET_OS_REPO:-false}
trap trap::info 1 2 3 15 EXIT
######################################################################################################
# function
######################################################################################################
function trap::info() {
# 信号处理
[[ ${#ERROR_INFO} -gt 37 ]] && echo -e "$ERROR_INFO"
[[ ${#ACCESS_INFO} -gt 38 ]] && echo -e "$ACCESS_INFO"
[ -f "$LOG_FILE" ] && echo -e "\n\n See detailed log >>> $LOG_FILE \n\n"
trap '' EXIT
exit
}
function log::error() {
# 错误日志
local item; item="[$(date +'%Y-%m-%dT%H:%M:%S.%N%z')]: \033[31mERROR: \033[0m$*"
ERROR_INFO="${ERROR_INFO}${item}\n "
echo -e "${item}" | tee -a "$LOG_FILE"
}
function log::info() {
# 基础日志
printf "[%s]: \033[32mINFO: \033[0m%s\n" "$(date +'%Y-%m-%dT%H:%M:%S.%N%z')" "$*" | tee -a "$LOG_FILE"
}
function log::warning() {
# 警告日志
printf "[%s]: \033[33mWARNING: \033[0m%s\n" "$(date +'%Y-%m-%dT%H:%M:%S.%N%z')" "$*" | tee -a "$LOG_FILE"
}
function log::access() {
# 访问信息
ACCESS_INFO="${ACCESS_INFO}$*\n "
printf "[%s]: \033[32mINFO: \033[0m%s\n" "$(date +'%Y-%m-%dT%H:%M:%S.%N%z')" "$*" | tee -a "$LOG_FILE"
}
function log::exec() {
# 执行日志
printf "[%s]: \033[34mEXEC: \033[0m%s\n" "$(date +'%Y-%m-%dT%H:%M:%S.%N%z')" "$*" >> "$LOG_FILE"
}
function utils::version_to_number() {
# 版本号转数字
echo "$@" | awk -F. '{ printf("%d%03d%03d%03d\n", $1,$2,$3,$4); }';
}
function utils::retry {
# 重试
local retries=$1
shift
local count=0
until eval "$*"; do
exit=$?
wait=$((2 ** count))
count=$((count + 1))
if [ "$count" -lt "$retries" ]; then
echo "Retry $count/$retries exited $exit, retrying in $wait seconds..."
sleep $wait
else
echo "Retry $count/$retries exited $exit, no more retries left."
return $exit
fi
done
return 0
}
function utils::quote() {
# 转义引号
# shellcheck disable=SC2046
if [ $(echo "$*" | tr -d "\n" | wc -c) -eq 0 ]; then
echo "''"
elif [ $(echo "$*" | tr -d "[a-z][A-Z][0-9]:,.=~_/\n-" | wc -c) -gt 0 ]; then
printf "%s" "$*" | sed -e "1h;2,\$H;\$!d;g" -e "s/'/\'\"\'\"\'/g" | sed -e "1h;2,\$H;\$!d;g" -e "s/^/'/g" -e "s/$/'/g"
else
echo "$*"
fi
}
function utils::download_file() {
# 下载文件
local url="$1"
local dest="$2"
local unzip_tag="${3:-1}"
local dest_dirname; dest_dirname=$(dirname "$dest")
local filename; filename=$(basename "$dest")
log::info "[download]" "${filename}"
command::exec "${MGMT_NODE}" "
set -e
if [ ! -f \"${dest}\" ]; then
[ ! -d \"${dest_dirname}\" ] && mkdir -pv \"${dest_dirname}\"
wget --timeout=10 --waitretry=3 --tries=5 --retry-connrefused --no-check-certificate \"${url}\" -O \"${dest}\"
if [[ \"${unzip_tag}\" == \"unzip\" ]]; then
command -v unzip 2>/dev/null || yum install -y unzip
unzip -o \"${dest}\" -d \"${dest_dirname}\"
fi
else
echo \"${dest} is exists!\"
fi
"
local status="$?"
check::exit_code "$status" "download" "${filename}" "exit"
return "$status"
}
function utils::is_element_in_array() {
# 判断是否在数组中存在元素
local -r element="${1}"
local -r array=("${@:2}")
local walker=''
for walker in "${array[@]}"
do
[[ "${walker}" = "${element}" ]] && return 0
done
return 1
}
function command::exec() {
# 执行命令
local host=${1:-}
shift
local command="$*"
if [[ "${SUDO_TAG:-}" == "1" ]]; then
sudo_options="sudo -H -n -u ${SUDO_USER}"
if [[ "${SUDO_PASSWORD:-}" != "" ]]; then
sudo_options="${sudo_options// -n/} -p \"\" -S <<< \"${SUDO_PASSWORD}\""
fi
command="$sudo_options bash -c $(utils::quote "$command")"
fi
command="$(utils::quote "$command")"
if [[ "${host}" == "127.0.0.1" ]]; then
# 本地执行
log::exec "[command]" "bash -c $(printf "%s" "${command//${SUDO_PASSWORD:-}/zzzzzz}")"
# shellcheck disable=SC2094
COMMAND_OUTPUT=$(eval bash -c "${command}" 2>> "$LOG_FILE" | tee -a "$LOG_FILE")
local status=$?
else
# 远程执行
local ssh_cmd="ssh"
if [[ "${SSH_PASSWORD}" != "" ]]; then
ssh_cmd="sshpass -p \"${SSH_PASSWORD}\" ${ssh_cmd}"
elif [[ "$SSH_PRIVATE_KEY" != "" ]]; then
[ -f "${SSH_PRIVATE_KEY}" ] || { log::error "[exec]" "ssh private_key:${SSH_PRIVATE_KEY} not found."; exit 1; }
ssh_cmd="${ssh_cmd} -i $SSH_PRIVATE_KEY"
fi
log::exec "[command]" "${ssh_cmd//${SSH_PASSWORD:-}/zzzzzz} ${SSH_OPTIONS} ${SSH_USER}@${host} -p ${SSH_PORT} bash -c $(printf "%s" "${command//${SUDO_PASSWORD:-}/zzzzzz}")"
# shellcheck disable=SC2094
COMMAND_OUTPUT=$(eval "${ssh_cmd} ${SSH_OPTIONS} ${SSH_USER}@${host} -p ${SSH_PORT}" bash -c '"${command}"' 2>> "$LOG_FILE" | tee -a "$LOG_FILE")
local status=$?
fi
return $status
}
function command::scp() {
# 拷贝文件
local host=${1:-}
local src=${2:-}
local dest=${3:-/tmp/}
if [[ "${host}" == "127.0.0.1" ]]; then
local command="cp -rf ${src} ${dest}"
log::exec "[command]" "bash -c \"${command}\""
# shellcheck disable=SC2094
COMMAND_OUTPUT=$(bash -c "${command}" 2>> "$LOG_FILE" | tee -a "$LOG_FILE")
local status=$?
else
local scp_cmd="scp"
if [[ "${SSH_PASSWORD}" != "" ]]; then
scp_cmd="sshpass -p \"${SSH_PASSWORD}\" ${scp_cmd}"
elif [[ "$SSH_PRIVATE_KEY" != "" ]]; then
[ -f "${SSH_PRIVATE_KEY}" ] || { log::error "[exec]" "ssh private_key:${SSH_PRIVATE_KEY} not found."; exit 1; }
scp_cmd="${scp_cmd} -i $SSH_PRIVATE_KEY"
fi
log::exec "[command]" "${scp_cmd} ${SSH_OPTIONS} -P ${SSH_PORT} -r ${src} ${SSH_USER}@${host}:${dest}" >> "$LOG_FILE"
# shellcheck disable=SC2094
COMMAND_OUTPUT=$(eval "${scp_cmd} ${SSH_OPTIONS} -P ${SSH_PORT} -r ${src} ${SSH_USER}@${host}:${dest}" 2>> "$LOG_FILE" | tee -a "$LOG_FILE")
local status=$?
fi
return $status
}
function script::init_node() {
# 节点初始化脚本
# clean
sed -i -e "/$KUBE_APISERVER/d" -e '/-worker-/d' -e '/-master-/d' /etc/hosts
sed -i '/## Kainstall managed start/,/## Kainstall managed end/d' /etc/security/limits.conf /etc/systemd/system.conf /etc/bashrc /etc/rc.local /etc/audit/rules.d/audit.rules
# Disable selinux
sed -i '/SELINUX/s/enforcing/disabled/' /etc/selinux/config
setenforce 0
# Disable swap
swapoff -a && sysctl -w vm.swappiness=0
sed -ri '/^[^#]*swap/s@^@#@' /etc/fstab
# Disable firewalld
for target in firewalld python-firewall firewalld-filesystem iptables; do
systemctl stop $target &>/dev/null || true
systemctl disable $target &>/dev/null || true
done
# repo
[[ -f /etc/yum.repos.d/CentOS-Base.repo && "${SKIP_SET_OS_REPO,,}" == "false" ]] && sed -e 's!^#baseurl=!baseurl=!g' \
-e 's!^mirrorlist=!#mirrorlist=!g' \
-e 's!mirror.centos.org!mirrors.aliyun.com!g' \
-i /etc/yum.repos.d/CentOS-Base.repo
[[ "${OFFLINE_TAG:-}" != "1" && "${SKIP_SET_OS_REPO,,}" == "false" ]] && yum install -y epel-release
[[ -f /etc/yum.repos.d/epel.repo && "${SKIP_SET_OS_REPO,,}" == "false" ]] && sed -e 's!^mirrorlist=!#mirrorlist=!g' \
-e 's!^metalink=!#metalink=!g' \
-e 's!^#baseurl=!baseurl=!g' \
-e 's!//download.*/pub!//mirrors.aliyun.com!g' \
-e 's!http://mirrors\.aliyun!https://mirrors.aliyun!g' \
-i /etc/yum.repos.d/epel.repo
yum clean all
# Change limits
[ ! -f /etc/security/limits.conf_bak ] && cp /etc/security/limits.conf{,_bak}
cat << EOF >> /etc/security/limits.conf
## Kainstall managed start
root soft nofile 655360
root hard nofile 655360
root soft nproc 655360
root hard nproc 655360
root soft core unlimited
root hard core unlimited
* soft nofile 655360
* hard nofile 655360
* soft nproc 655360
* hard nproc 655360
* soft core unlimited
* hard core unlimited
## Kainstall managed end
EOF
[ -f /etc/security/limits.d/20-nproc.conf ] && sed -i 's#4096#655360#g' /etc/security/limits.d/20-nproc.conf
cat << EOF >> /etc/systemd/system.conf
## Kainstall managed start
DefaultLimitCORE=infinity
DefaultLimitNOFILE=655360
DefaultLimitNPROC=655360
DefaultTasksMax=75%
## Kainstall managed end
EOF
# Change sysctl
cat << EOF > /etc/sysctl.d/99-kube.conf
# https://www.kernel.org/doc/Documentation/sysctl/
#############################################################################################
# 调整虚拟内存
#############################################################################################
# Default: 30
# 0 - 任何情况下都不使用swap。
# 1 - 除非内存不足（OOM），否则不使用swap。
vm.swappiness = 0
# 内存分配策略
#0 - 表示内核将检查是否有足够的可用内存供应用进程使用；如果有足够的可用内存，内存申请允许；否则，内存申请失败，并把错误返回给应用进程。
#1 - 表示内核允许分配所有的物理内存，而不管当前的内存状态如何。
#2 - 表示内核允许分配超过所有物理内存和交换空间总和的内存
vm.overcommit_memory=1
# OOM时处理
# 1关闭，等于0时，表示当内存耗尽时，内核会触发OOM killer杀掉最耗内存的进程。
vm.panic_on_oom=0
# vm.dirty_background_ratio 用于调整内核如何处理必须刷新到磁盘的脏页。
# Default value is 10.
# 该值是系统内存总量的百分比，在许多情况下将此值设置为5是合适的。
# 此设置不应设置为零。
vm.dirty_background_ratio = 5
# 内核强制同步操作将其刷新到磁盘之前允许的脏页总数
# 也可以通过更改 vm.dirty_ratio 的值（将其增加到默认值30以上（也占系统内存的百分比））来增加
# 推荐 vm.dirty_ratio 的值在60到80之间。
vm.dirty_ratio = 60
# vm.max_map_count 计算当前的内存映射文件数。
# mmap 限制（vm.max_map_count）的最小值是打开文件的ulimit数量（cat /proc/sys/fs/file-max）。
# 每128KB系统内存 map_count应该大约为1。 因此，在32GB系统上，max_map_count为262144。
# Default: 65530
vm.max_map_count = 2097152
#############################################################################################
# 调整文件
#############################################################################################
fs.may_detach_mounts = 1
# 增加文件句柄和inode缓存的大小，并限制核心转储。
fs.file-max = 2097152
fs.nr_open = 2097152
fs.suid_dumpable = 0
# 同时可以拥有的的异步IO请求数目
fs.aio-max-nr = 10000000
fs.aio-nr = 75552
# 文件监控
fs.inotify.max_user_instances=8192
fs.inotify.max_user_watches=524288
fs.inotify.max_queued_events=16384
#############################################################################################
# 调整网络设置
#############################################################################################
# 为每个套接字的发送和接收缓冲区分配的默认内存量。
net.core.wmem_default = 25165824
net.core.rmem_default = 25165824
# 为每个套接字的发送和接收缓冲区分配的最大内存量。
net.core.wmem_max = 25165824
net.core.rmem_max = 25165824
# 除了套接字设置外，发送和接收缓冲区的大小
# 必须使用net.ipv4.tcp_wmem和net.ipv4.tcp_rmem参数分别设置TCP套接字。
# 使用三个以空格分隔的整数设置这些整数，分别指定最小，默认和最大大小。
# 最大大小不能大于使用net.core.wmem_max和net.core.rmem_max为所有套接字指定的值。
# 合理的设置是最小4KiB，默认64KiB和最大2MiB缓冲区。
net.ipv4.tcp_wmem = 20480 12582912 25165824
net.ipv4.tcp_rmem = 20480 12582912 25165824
# 增加最大可分配的总缓冲区空间
# 以页为单位（4096字节）进行度量
net.ipv4.tcp_mem = 65536 25165824 262144
net.ipv4.udp_mem = 65536 25165824 262144
# 为每个套接字的发送和接收缓冲区分配的最小内存量。
net.ipv4.udp_wmem_min = 16384
net.ipv4.udp_rmem_min = 16384
# 启用TCP窗口缩放，客户端可以更有效地传输数据，并允许在代理方缓冲该数据。
net.ipv4.tcp_window_scaling = 1
# 提高同时接受连接数。
net.ipv4.tcp_max_syn_backlog = 10240
# 将net.core.netdev_max_backlog的值增加到大于默认值1000
# 可以帮助突发网络流量，特别是在使用数千兆位网络连接速度时，
# 通过允许更多的数据包排队等待内核处理它们。
net.core.netdev_max_backlog = 65536
# 增加选项内存缓冲区的最大数量
net.core.optmem_max = 25165824
# 被动TCP连接的SYNACK次数。
net.ipv4.tcp_synack_retries = 2
# 允许的本地端口范围。
net.ipv4.ip_local_port_range = 2048 65535
# 防止TCP时间等待
# Default: net.ipv4.tcp_rfc1337 = 0
net.ipv4.tcp_rfc1337 = 1
# 减少tcp_fin_timeout连接的时间默认值
net.ipv4.tcp_fin_timeout = 15
# 积压套接字的最大数量。
# Default is 128.
net.core.somaxconn = 32768
# 打开syncookies以进行SYN洪水攻击保护。
net.ipv4.tcp_syncookies = 1
# 避免Smurf攻击
# 发送伪装的ICMP数据包，目的地址设为某个网络的广播地址，源地址设为要攻击的目的主机，
# 使所有收到此ICMP数据包的主机都将对目的主机发出一个回应，使被攻击主机在某一段时间内收到成千上万的数据包
net.ipv4.icmp_echo_ignore_broadcasts = 1
# 为icmp错误消息打开保护
net.ipv4.icmp_ignore_bogus_error_responses = 1
# 启用自动缩放窗口。
# 如果延迟证明合理，这将允许TCP缓冲区超过其通常的最大值64K。
net.ipv4.tcp_window_scaling = 1
# 打开并记录欺骗，源路由和重定向数据包
net.ipv4.conf.all.log_martians = 1
net.ipv4.conf.default.log_martians = 1
# 告诉内核有多少个未附加的TCP套接字维护用户文件句柄。 万一超过这个数字，
# 孤立的连接会立即重置，并显示警告。
# Default: net.ipv4.tcp_max_orphans = 65536
net.ipv4.tcp_max_orphans = 65536
# 不要在关闭连接时缓存指标
net.ipv4.tcp_no_metrics_save = 1
# 启用RFC1323中定义的时间戳记：
# Default: net.ipv4.tcp_timestamps = 1
net.ipv4.tcp_timestamps = 1
# 启用选择确认。
# Default: net.ipv4.tcp_sack = 1
net.ipv4.tcp_sack = 1
# 增加 tcp-time-wait 存储桶池大小，以防止简单的DOS攻击。
# net.ipv4.tcp_tw_recycle 已从Linux 4.12中删除。请改用net.ipv4.tcp_tw_reuse。
net.ipv4.tcp_max_tw_buckets = 14400
net.ipv4.tcp_tw_reuse = 1
# accept_source_route 选项使网络接口接受设置了严格源路由（SSR）或松散源路由（LSR）选项的数据包。
# 以下设置将丢弃设置了SSR或LSR选项的数据包。
net.ipv4.conf.all.accept_source_route = 0
net.ipv4.conf.default.accept_source_route = 0
# 打开反向路径过滤
net.ipv4.conf.all.rp_filter = 1
net.ipv4.conf.default.rp_filter = 1
# 禁用ICMP重定向接受
net.ipv4.conf.all.accept_redirects = 0
net.ipv4.conf.default.accept_redirects = 0
net.ipv4.conf.all.secure_redirects = 0
net.ipv4.conf.default.secure_redirects = 0
# 禁止发送所有IPv4 ICMP重定向数据包。
net.ipv4.conf.all.send_redirects = 0
net.ipv4.conf.default.send_redirects = 0
# 开启IP转发.
net.ipv4.ip_forward = 1
# 禁止IPv6
net.ipv6.conf.lo.disable_ipv6=1
net.ipv6.conf.all.disable_ipv6 = 1
net.ipv6.conf.default.disable_ipv6 = 1
# 要求iptables不对bridge的数据进行处理
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.bridge.bridge-nf-call-arptables = 1
# arp缓存
# 存在于 ARP 高速缓存中的最少层数，如果少于这个数，垃圾收集器将不会运行。缺省值是 128
net.ipv4.neigh.default.gc_thresh1=2048
# 保存在 ARP 高速缓存中的最多的记录软限制。垃圾收集器在开始收集前，允许记录数超过这个数字 5 秒。缺省值是 512
net.ipv4.neigh.default.gc_thresh2=4096
# 保存在 ARP 高速缓存中的最多记录的硬限制，一旦高速缓存中的数目高于此，垃圾收集器将马上运行。缺省值是 1024
net.ipv4.neigh.default.gc_thresh3=8192
# 持久连接
net.ipv4.tcp_keepalive_time = 600
net.ipv4.tcp_keepalive_intvl = 30
net.ipv4.tcp_keepalive_probes = 10
# conntrack表
net.nf_conntrack_max=1048576
net.netfilter.nf_conntrack_max=1048576
net.netfilter.nf_conntrack_buckets=262144
net.netfilter.nf_conntrack_tcp_timeout_fin_wait=30
net.netfilter.nf_conntrack_tcp_timeout_time_wait=30
net.netfilter.nf_conntrack_tcp_timeout_close_wait=15
net.netfilter.nf_conntrack_tcp_timeout_established=300
#############################################################################################
# 调整内核参数
#############################################################################################
# 地址空间布局随机化（ASLR）是一种用于操作系统的内存保护过程，可防止缓冲区溢出攻击。
# 这有助于确保与系统上正在运行的进程相关联的内存地址不可预测，
# 因此，与这些流程相关的缺陷或漏洞将更加难以利用。
# Accepted values: 0 = 关闭, 1 = 保守随机化, 2 = 完全随机化
kernel.randomize_va_space = 2
# 调高 PID 数量
kernel.pid_max = 65536
kernel.threads-max=30938
# coredump
kernel.core_pattern=core
# 决定了检测到soft lockup时是否自动panic，缺省值是0
kernel.softlockup_all_cpu_backtrace=1
kernel.softlockup_panic=1
EOF
# history
cat << EOF >> /etc/bashrc
## Kainstall managed start
# history actions record，include action time, user, login ip
HISTFILESIZE=5000
HISTSIZE=5000
USER_IP=\$(who -u am i 2>/dev/null | awk '{print \$NF}' | sed -e 's/[()]//g')
if [ -z \$USER_IP ]
then
USER_IP=\$(hostname -i)
fi
HISTTIMEFORMAT="%Y-%m-%d %H:%M:%S \$USER_IP:\$(whoami) "
export HISTFILESIZE HISTSIZE HISTTIMEFORMAT
# PS1
PS1='\[\033[0m\]\[\033[1;36m\][\u\[\033[0m\]@\[\033[1;32m\]\h\[\033[0m\] \[\033[1;31m\]\w\[\033[0m\]\[\033[1;36m\]]\[\033[33;1m\]\\$ \[\033[0m\]'
## Kainstall managed end
EOF
# journal
mkdir -p /var/log/journal /etc/systemd/journald.conf.d
cat << EOF > /etc/systemd/journald.conf.d/99-prophet.conf
[Journal]
# 持久化保存到磁盘
Storage=persistent
# 压缩历史日志
Compress=yes
SyncIntervalSec=5m
RateLimitInterval=30s
RateLimitBurst=1000
# 最大占用空间 10G
SystemMaxUse=10G
# 单日志文件最大 200M
SystemMaxFileSize=200M
# 日志保存时间 3 周
MaxRetentionSec=3week
# 不将日志转发到 syslog
ForwardToSyslog=no
EOF
# motd
cat << EOF > /etc/profile.d/zz-ssh-login-info.sh
#!/bin/sh
#
# @Time : 2020-02-04
# @Author : lework
# @Desc : ssh login banner
export PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:\$PATH
shopt -q login_shell && : || return 0
echo -e "\033[0;32m
██╗ ██╗ █████╗ ███████╗
██║ ██╔╝██╔══██╗██╔════╝
█████╔╝ ╚█████╔╝███████╗
██╔═██╗ ██╔══██╗╚════██║
██║ ██╗╚█████╔╝███████║
╚═╝ ╚═╝ ╚════╝ ╚══════ by kainstall\033[0m"
# os
upSeconds="\$(cut -d. -f1 /proc/uptime)"
secs=\$((\${upSeconds}%60))
mins=\$((\${upSeconds}/60%60))
hours=\$((\${upSeconds}/3600%24))
days=\$((\${upSeconds}/86400))
UPTIME_INFO=\$(printf "%d days, %02dh %02dm %02ds" "\$days" "\$hours" "\$mins" "\$secs")
if [ -f /etc/redhat-release ] ; then
PRETTY_NAME=\$(< /etc/redhat-release)
elif [ -f /etc/debian_version ]; then
DIST_VER=\$(</etc/debian_version)
PRETTY_NAME="\$(grep PRETTY_NAME /etc/os-release | sed -e 's/PRETTY_NAME=//g' -e 's/"//g') (\$DIST_VER)"
else
PRETTY_NAME=\$(cat /etc/*-release | grep "PRETTY_NAME" | sed -e 's/PRETTY_NAME=//g' -e 's/"//g')
fi
if [[ -d "/system/app/" && -d "/system/priv-app" ]]; then
model="\$(getprop ro.product.brand) \$(getprop ro.product.model)"
elif [[ -f /sys/devices/virtual/dmi/id/product_name ||
-f /sys/devices/virtual/dmi/id/product_version ]]; then
model="\$(< /sys/devices/virtual/dmi/id/product_name)"
model+=" \$(< /sys/devices/virtual/dmi/id/product_version)"
elif [[ -f /sys/firmware/devicetree/base/model ]]; then
model="\$(< /sys/firmware/devicetree/base/model)"
elif [[ -f /tmp/sysinfo/model ]]; then
model="\$(< /tmp/sysinfo/model)"
fi
MODEL_INFO=\${model}
KERNEL=\$(uname -srmo)
USER_NUM=\$(who -u | wc -l)
RUNNING=\$(ps ax | wc -l | tr -d " ")
# disk
totaldisk=\$(df -h -x devtmpfs -x tmpfs -x debugfs -x aufs -x overlay --total 2>/dev/null | tail -1)
disktotal=\$(awk '{print \$2}' <<< "\${totaldisk}")
diskused=\$(awk '{print \$3}' <<< "\${totaldisk}")
diskusedper=\$(awk '{print \$5}' <<< "\${totaldisk}")
DISK_INFO="\033[0;33m\${diskused}\033[0m of \033[1;34m\${disktotal}\033[0m disk space used (\033[0;33m\${diskusedper}\033[0m)"
# cpu
cpu=\$(awk -F':' '/^model name/ {print \$2}' /proc/cpuinfo | uniq | sed -e 's/^[ \t]*//')
cpun=\$(grep -c '^processor' /proc/cpuinfo)
cpuc=\$(grep '^cpu cores' /proc/cpuinfo | tail -1 | awk '{print \$4}')
cpup=\$(grep '^physical id' /proc/cpuinfo | wc -l)
CPU_INFO="\${cpu} \${cpup}P \${cpuc}C \${cpun}L"
# get the load averages
read one five fifteen rest < /proc/loadavg
LOADAVG_INFO="\033[0;33m\${one}\033[0m / \${five} / \${fifteen} with \033[1;34m\$(( cpun*cpuc ))\033[0m core(s) at \033[1;34m\$(grep '^cpu MHz' /proc/cpuinfo | tail -1 | awk '{print \$4}')\033 MHz"
# mem
MEM_INFO="\$(cat /proc/meminfo | awk '/MemTotal:/{total=\$2/1024/1024;next} /MemAvailable:/{use=total-\$2/1024/1024; printf("\033[0;33m%.2fGiB\033[0m of \033[1;34m%.2fGiB\033[0m RAM used (\033[0;33m%.2f%%\033[0m)",use,total,(use/total)*100);}')"
# network
# extranet_ip=" and \$(curl -s ip.cip.cc)"
IP_INFO="\$(ip a|grep -E '^[0-9]+: em*|^[0-9]+: eno*|^[0-9]+: enp*|^[0-9]+: ens*|^[0-9]+: eth*|^[0-9]+: wlp*' -A2|grep inet|awk -F ' ' '{print \$2}'|cut -f1 -d/|xargs echo)"
# Container info
CONTAINER_INFO="\$(sudo /usr/bin/crictl ps -a -o yaml 2> /dev/null | awk '/^ state: /{gsub("CONTAINER_", "", \$NF) ++S[\$NF]}END{for(m in S) printf "%s%s:%s ",substr(m,1,1),tolower(substr(m,2)),S[m]}')Images:\$(sudo /usr/bin/crictl images -q 2> /dev/null | wc -l)"
# info
echo -e "
Information as of: \033[1;34m\$(date +"%Y-%m-%d %T")\033[0m
\033[0;1;31mProduct\033[0m............: \${MODEL_INFO}
\033[0;1;31mOS\033[0m.................: \${PRETTY_NAME}
\033[0;1;31mKernel\033[0m.............: \${KERNEL}
\033[0;1;31mCPU\033[0m................: \${CPU_INFO}
\033[0;1;31mHostname\033[0m...........: \033[1;34m\$(hostname)\033[0m
\033[0;1;31mIP Addresses\033[0m.......: \033[1;34m\${IP_INFO}\033[0m
\033[0;1;31mUptime\033[0m.............: \033[0;33m\${UPTIME_INFO}\033[0m
\033[0;1;31mMemory\033[0m.............: \${MEM_INFO}
\033[0;1;31mLoad Averages\033[0m......: \${LOADAVG_INFO}
\033[0;1;31mDisk Usage\033[0m.........: \${DISK_INFO}
\033[0;1;31mUsers online\033[0m.......: \033[1;34m\${USER_NUM}\033[0m
\033[0;1;31mRunning Processes\033[0m..: \033[1;34m\${RUNNING}\033[0m
\033[0;1;31mContainer Info\033[0m.....: \${CONTAINER_INFO}
"
EOF
chmod +x /etc/profile.d/zz-ssh-login-info.sh
echo 'ALL ALL=(ALL) NOPASSWD:/usr/bin/crictl' > /etc/sudoers.d/crictl
# time sync
ntpd --help >/dev/null 2>&1 && yum remove -y ntp
[[ "${OFFLINE_TAG:-}" != "1" ]] && yum install -y chrony
[ ! -f /etc/chrony.conf_bak ] && cp /etc/chrony.conf{,_bak} #备份默认配置
cat << EOF > /etc/chrony.conf
server ntp.aliyun.com iburst
server cn.ntp.org.cn iburst
server ntp.shu.edu.cn iburst
server 0.cn.pool.ntp.org iburst
server 1.cn.pool.ntp.org iburst
server 2.cn.pool.ntp.org iburst
server 3.cn.pool.ntp.org iburst
driftfile /var/lib/chrony/drift
makestep 1.0 3
logdir /var/log/chrony
EOF
timedatectl set-timezone Asia/Shanghai
chronyd -q -t 1 'server cn.pool.ntp.org iburst maxsamples 1'
systemctl enable chronyd
systemctl start chronyd
chronyc sources -v
chronyc sourcestats
hwclock --systohc
# package
[[ "${OFFLINE_TAG:-}" != "1" ]] && yum install -y curl wget
# ipvs
[[ "${OFFLINE_TAG:-}" != "1" ]] && yum install -y ipvsadm ipset sysstat conntrack libseccomp
module=(
ip_vs
ip_vs_rr
ip_vs_wrr
ip_vs_sh
overlay
nf_conntrack
br_netfilter
)
[ -f /etc/modules-load.d/ipvs.conf ] && cp -f /etc/modules-load.d/ipvs.conf{,_bak}
for kernel_module in "${module[@]}";do
/sbin/modinfo -F filename "$kernel_module" |& grep -qv ERROR && echo "$kernel_module" >> /etc/modules-load.d/ipvs.conf
done
systemctl restart systemd-modules-load
systemctl enable systemd-modules-load
sysctl --system
# audit
[[ "${OFFLINE_TAG:-}" != "1" ]] && yum install -y audit audit-libs
cat << EOF >> /etc/audit/rules.d/audit.rules
## Kainstall managed start
# Ignore errors
-i
# SYSCALL
-a always,exit -F arch=b64 -S kill,tkill,tgkill -F a1=9 -F key=trace_kill_9
-a always,exit -F arch=b64 -S kill,tkill,tgkill -F a1=15 -F key=trace_kill_15
# docker
-w /usr/bin/dockerd -k docker
-w /var/lib/docker -k docker
-w /etc/docker -k docker
-w /usr/lib/systemd/system/docker.service -k docker
-w /etc/systemd/system/docker.service -k docker
-w /usr/lib/systemd/system/docker.socket -k docker
-w /etc/default/docker -k docker
-w /etc/sysconfig/docker -k docker
-w /etc/docker/daemon.json -k docker
# containerd
-w /usr/bin/containerd -k containerd
-w /var/lib/containerd -k containerd
-w /usr/lib/systemd/system/containerd.service -k containerd
-w /etc/containerd/config.toml -k containerd
# cri-o
-w /usr/bin/crio -k cri-o
-w /etc/crio -k cri-o
# runc
-w /usr/bin/runc -k runc
# kube
-w /usr/bin/kubeadm -k kubeadm
-w /usr/bin/kubelet -k kubelet
-w /usr/bin/kubectl -k kubectl
-w /var/lib/kubelet -k kubelet
-w /etc/kubernetes -k kubernetes
## Kainstall managed end
EOF
chmod 600 /etc/audit/rules.d/audit.rules
sed -i 's#max_log_file =.*#max_log_file = 80#g' /etc/audit/auditd.conf
if [ -f /usr/libexec/initscripts/legacy-actions/auditd/restart ]; then
/usr/libexec/initscripts/legacy-actions/auditd/restart
else
systemctl stop auditd && systemctl start auditd
fi
systemctl enable auditd
grep single-request-reopen /etc/resolv.conf || sed -i '1ioptions timeout:2 attempts:3 rotate single-request-reopen' /etc/resolv.conf
ipvsadm --clear
iptables -F && iptables -t nat -F && iptables -t mangle -F && iptables -X
}
function script::upgrade_kernel() {
# 升级内核
local ver; ver=$(rpm --eval "%{centos_ver}")
[[ "${OFFLINE_TAG:-}" != "1" ]] && yum install -y "https://www.elrepo.org/elrepo-release-${ver}.el${ver}.elrepo.noarch.rpm"
sed -e "s/^mirrorlist=/#mirrorlist=/g" \
-e "s/elrepo.org\/linux/mirrors.tuna.tsinghua.edu.cn\/elrepo/g" \
-i /etc/yum.repos.d/elrepo.repo
if ! command -v perl; then yum install -y perl;fi
[[ "${OFFLINE_TAG:-}" != "1" ]] && if ! yum install -y --disablerepo="*" --enablerepo=elrepo-kernel kernel-ml{,-devel}; then exit 1;fi
grub2-set-default 0 && grub2-mkconfig -o /etc/grub2.cfg
grubby --default-kernel
grubby --args="cgroup_enable=cpuset cgroup_memory=1 cgroup_enable=memory user_namespace.enable=1" --update-kernel="$(grubby --default-kernel)"
}
function script::upgrage_kube() {
# 节点软件升级
local role=${1:-init}
local version="-${2:-latest}"
version="${version#-latest}"
set -e
echo '[install] kubeadm'
kubeadm version
yum install -y "kubeadm${version}" --disableexcludes=kubernetes
kubeadm version
echo '[upgrade]'
if [[ "$role" == "init" ]]; then
local plan_info; plan_info=$(kubeadm upgrade plan)
local v; v=$(printf "%s" "$plan_info" | grep 'kubeadm upgrade apply ' | awk '{print $4}'| tail -1 )
printf "%s\n" "${plan_info}"
kubeadm upgrade apply "${v}" -y
else
kubeadm upgrade node
fi
echo '[install] kubelet kubectl'
kubectl version --client=true
yum install -y "kubelet${version}" "kubectl${version}" --disableexcludes=kubernetes
kubectl version --client=true
[ -f /usr/lib/systemd/system/kubelet.service.d/10-kubeadm.conf ] && \
sed -i 's#^\[Service\]#[Service]\nCPUAccounting=true\nMemoryAccounting=true#g' /usr/lib/systemd/system/kubelet.service.d/10-kubeadm.conf
systemctl daemon-reload
systemctl restart kubelet
}
function script::install_docker() {
# 安装 docker
local version="-${1:-latest}"
version="${version#-latest}"
cat << EOF > /etc/yum.repos.d/docker-ce.repo
[docker-ce-stable]
name=Docker CE Stable - \$basearch
baseurl=https://mirrors.aliyun.com/docker-ce/linux/centos/$(rpm --eval '%{centos_ver}')/\$basearch/stable
enabled=1
gpgcheck=1
gpgkey=https://mirrors.aliyun.com/docker-ce/linux/centos/gpg
EOF
if [[ "${OFFLINE_TAG:-}" != "1" ]];then
[ -f "$(which docker)" ] && yum remove -y docker-ce docker-ce-cli containerd.io
yum install -y "docker-ce${version}" "docker-ce-cli${version}" containerd.io bash-completion
fi
[ -f /usr/share/bash-completion/completions/docker ] && \
cp -f /usr/share/bash-completion/completions/docker /etc/bash_completion.d/
[ ! -d /etc/docker ] && mkdir /etc/docker
cat << EOF > /etc/docker/daemon.json
{
"data-root": "/var/lib/docker",
"log-driver": "json-file",
"log-opts": {
"max-size": "200m",
"max-file": "5"
},
"default-ulimits": {
"nofile": {
"Name": "nofile",
"Hard": 655360,
"Soft": 655360
},
"nproc": {
"Name": "nproc",
"Hard": 655360,
"Soft": 655360
}
},
"live-restore": true,
"oom-score-adjust": -1000,
"max-concurrent-downloads": 10,
"max-concurrent-uploads": 10,
"registry-mirrors": [
"https://yssx4sxy.mirror.aliyuncs.com/"
]
}
EOF
sed -i 's|#oom_score = 0|oom_score = -999|' /etc/containerd/config.toml
cat << EOF > /etc/crictl.yaml
runtime-endpoint: unix:///var/run/dockershim.sock
image-endpoint: unix:///var/run/dockershim.sock
timeout: 2
debug: false
pull-image-on-create: true
disable-pull-on-run: false
EOF
systemctl enable containerd
systemctl restart containerd
systemctl enable docker
systemctl restart docker
}
function script::install_containerd() {
# 安装 containerd
local version="-${1:-latest}"
version="${version#-latest}"
cat << EOF > /etc/yum.repos.d/docker-ce.repo
[docker-ce-stable]