基于shell实现向多台服务器拷贝hosts文件

写这个脚本的目的是在生产环境中向多个服务器拷贝hosts文件，能满足自己的使用要求。

github: https://github.com/charnet1019/auto-scp-files.git

注意：

需要安装expect

#!/bin/bash
##########################################################
#
# Copyright (2017-10-21, )
#
# Author: charnet1019@163.com
# Last modified: 2017-10-22 00:06
# Description:
#
##########################################################

# definition IP dictionary array
declare -A IPListDict

# 所有主机默认使用root帐号
USERNAME=root
# 本地要拷贝的文件
LOCAL="/etc/hosts"
# 拷贝到远程主机的位置
REMOTE="/tmp"

# 主机IP地址和密码，每行一个主机
IPListDict=(
[192.168.2.4]="secret"
)

ssh_key_base_dir=~/.ssh
ssh_known_hosts=$ssh_key_base_dir/known_hosts
SCP=/usr/bin/scp

DATETIME=`date "+%F %T"`

success() {
printf "\r$DATETIME [ \033[00;32mINFO\033[0m ]%s\n" "$1"
}

warn() {
printf "\r$DATETIME [\033[0;33mWARNING\033[0m]%s\n" "$1"
}

fail() {
printf "\r$DATETIME [ \033[0;31mERROR\033[0m ]%s\n" "$1"
}

usage() {
echo "Usage: ${0##*/} {info|warn|err} MSG"
}

log() {
if [ $# -lt 2 ]; then
log err "Not enough arguments [$#] to log."
fi

__LOG_PRIO="$1"
shift
__LOG_MSG="$*"

case "${__LOG_PRIO}" in
crit) __LOG_PRIO="CRIT";;
err) __LOG_PRIO="ERROR";;
warn) __LOG_PRIO="WARNING";;
info) __LOG_PRIO="INFO";;
debug) __LOG_PRIO="DEBUG";;
esac

if [ "${__LOG_PRIO}" = "INFO" ]; then
success " $__LOG_MSG"
elif [ "${__LOG_PRIO}" = "WARNING" ]; then
warn " $__LOG_MSG"
elif [ "${__LOG_PRIO}" = "ERROR" ]; then
fail " $__LOG_MSG"
else
usage
fi
}

is_exist_expect() {
if ! which expect &> /dev/null; then
return 1
fi

return 0
}

install_expect() {
yum -y install expect &> /dev/null
}

check_expect() {
is_exist_expect
if [ $? -eq 1 ]; then
log warn "No expect command and try to install, please wait..."
install_expect
is_exist_expect
if [ $? -eq 1 ]; then
log err "Installation failed, please install the expect command manually."
exit 1
else
log info "Installation successed."
fi
fi
}

#is_exist_hosts() {
#    local FILE=$1
#
#    [ -f ${FILE} ] && return 0 || return 1
#}

get_cipher() {
local IP=$1

for key in ${!IPListDict[@]}; do
if [[ X"$IP" == X"$key" ]]; then
PASSWORD="${IPListDict[$key]}"
fi
done
}

exec_cp() {
for ip in ${!IPListDict[@]}; do
get_cipher $ip
expect -c  <<- EOF &> /dev/null "
spawn $SCP -r $LOCAL $USERNAME@$ip:$REMOTE
expect {
\"(yes/no)?\" {
send \"yes\r\"
expect {
"*assword" {
send \"$PASSWORD\r\"
}
}
}

"*assword*" {
send \"$PASSWORD\r\"
}
expect "100%"
expect eof
}
catch wait retVal
exit [lindex \$retVal 3]"
EOF

if [ $? -eq 0 ]; then
log info "The file $LOCAL copy to the remote host $ip successed."
else
log err "The file $LOCAL copy to the remote host $ip failed."
fi
done
}

# main
check_expect
exec_cp