警告
本文最后更新于 2021-04-21，文中内容可能已过时。
以下是一片草稿，真的真的是我自己记录的。但是！我现在自己也看不懂了，我真是栓Q了，好像多了一个chroot初始没啥用
正常来说针对于文件共享的sftp应该是以用户为单位来做的,但这儿我却用的是组,这个其实是我测试用用户来做从来没有成功过，只能被迫用组
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#!/bin/bash
#################################################
# author 0x5c0f
# date 2020-12-04
# email mail@0x5c0f.cc
# web blog.0x5c0f.cc
# version 1.0.0
# last update 2021-04-21
# descript Use : ./chroot.init.sh
#################################################
PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin:~/bin
export PATH
# 用于在linux之间替代nfs系统
# chroot 系统根目录
CHROOTHOME="/chroot_sftp"
# sshfs
# 用户配置
SSHFSUID="1050"
SSHFSUSER="sshfs"
SSHFSROOT="/home/${SSHFSUSER}"
# sshfs chroot 映射目录
SSHFSCHROOTDIR="${CHROOTHOME}/sshfsdir"
# sshfs 本地共享目录
SSHFSLOCALSHARE="/mnt/sshfsdir"
function init_chroot(){
test ! -d ${CHROOTHOME} && {
mkdir -p ${CHROOTHOME}/{bin,usr,etc,lib64,home,dev,data}
mknod -m 666 ${CHROOTHOME}/dev/null c 1 3
mknod -m 666 ${CHROOTHOME}/dev/tty c 5 0
mknod -m 666 ${CHROOTHOME}/dev/zero c 1 5
mknod -m 666 ${CHROOTHOME}/dev/random c 1 8
chmod o+t ${CHROOTHOME}/dev/null ${CHROOTHOME}/dev/tty ${CHROOTHOME}/dev/zero ${CHROOTHOME}/dev/random
cd ${CHROOTHOME}/usr
ln -sf ../bin ./bin
ln -sf ../lib64 ./lib64
cp -p /bin/ls /bin/cat /bin/rm /bin/echo /bin/false /bin/touch /bin/vi /bin/mkdir ${CHROOTHOME}/bin/
for i in /bin/{ls,cat,echo,rm,false,touch,vi,mkdir}; do
list=$(ldd ${i} | egrep -o '/lib.*\.[0-9]')
for _so in $list; do
/bin/cp -v ${_so} ${CHROOTHOME}${_so}
done
done
}
}
function config_sshd(){
cat >> /etc/ssh/sshd_config <<EOE
Match $1 $2
ChrootDirectory $3
ForceCommand internal-sftp -l INFO -f AUTH
X11Forwarding no
AllowTcpForwarding no
PasswordAuthentication no
EOE
systemctl restart sshd
}
# 配置systemd管理模块
# $0 文件名 绑定目录 绑定目标目录 是否只读(默认为空: 读写)
# mount -o bind${4:+,ro} 绑定目录 绑定目标目录
function config_systemd(){
cat > /etc/systemd/system/$1 <<EOF
# Automatically generated by systemd-fstab-generator
[Unit]
SourcePath=/etc/fstab
Documentation=man:fstab(5) man:systemd-fstab-generator(8)
Before=local-fs.target
[Mount]
What=${2}
Where=${3}
Type=none
Options=defaults,bind${4:+,ro}
[Install]
WantedBy=multi-user.target
EOF
systemctl daemon-reload
systemctl enable --now $1
}
# 初始化sftp可用组
function init_sshfs(){
# 初始sshd配置
config_sshd "User" $SSHFSUSER $SSHFSCHROOTDIR
# 创建sshfs共享用户
useradd -u ${SSHFSUID} -m -k $(mktemp -d) -d ${SSHFSROOT} -s /bin/false ${SSHFSUSER}
# 创建远程登陆密钥
su - ${SSHFSUSER} -s /bin/bash -c "ssh-keygen -f ~/.ssh/id_rsa -t rsa -b 4096 -N ''"
su - ${SSHFSUSER} -s /bin/bash -c "cat ~/.ssh/id_rsa.pub > ~/.ssh/authorized_keys && chmod 600 ~/.ssh/authorized_keys"
# 创建chroot sshfs共享目录
mkdir -p ${CHROOTHOME}${SSHFSROOT}
# 绑定目录主目录
# mount -o ro,bind ${SSHFSROOT} ${CHROOTHOME}${SSHFSROOT}
# fstab
# cat >> /etc/fstab <<EOF
# ${SSHFSROOT} ${CHROOTHOME}${SSHFSROOT} none defaults,ro,bind 0 0
# EOF
SYSTEMDFNAME="${CHROOTHOME#/}${SSHFSROOT//\//-}.mount"
# 配置用户帐号映射
config_systemd "${SYSTEMDFNAME}" "${SSHFSROOT}" "${CHROOTHOME}${SSHFSROOT}" 1
# 配置sshfs目录映射
test ! -d ${SSHFSCHROOTDIR} && {
mkdir -p $SSHFSCHROOTDIR
}
test ! -d $SSHFSLOCALSHARE && {
mkdir -p $SSHFSLOCALSHARE
}
echo "sshfs 共享目录 " > $SSHFSLOCALSHARE/readme.md
TSSHFSCHROOTDIR=${SSHFSCHROOTDIR#/}
config_systemd "${TSSHFSCHROOTDIR//\//-}.mount" "${SSHFSLOCALSHARE}" "${SSHFSCHROOTDIR}"
# cat ${SSHFSROOT}/.ssh/id_rsa
}
init_chroot
# sshfs
init_sshfs
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# 开机启动项
$> vim /etc/fstab
sshfsdir@10.0.2.30:/node21 /data/backup fuse.sshfs auto,reconnect,_netdev,user,idmap=user,identityfile=/etc/.ssh/sshfsdir,allow_other,default_permissions,uid=1002,gid=1002 0 0
# zabbix 监控
$> vim /opt/zabbix-agentd/etc/zabbix_agentd.conf.d/sshfs_status.conf
UserParameter=sshfs_status,/bin/systemctl is-active data-ltbstore.mount >& /dev/null && echo 0 || echo 1
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