1.时间设置
检查是否为+0800
时区:
# date -R
Tue, 22 Nov 2016 18:46:14 +0800
如果不是+0800
时区,处理方法:
cp /usr/share/zoneinfo/Asia/Shanghai /etc/localtime
timedatectl set-timezone Asia/Shanghai
2.yum仓库
mv /etc/yum.repos.d/* /tmp
vi /etc/yum.repos.d/guoxin.repo
编辑/etc/yum.repos.d/guoxin.repo
如下:
[guoxin-base]
name=Guoxin-$releasever - Base - http://repo.91guoxin.bj
baseurl=http://10.10.10.70:8080/7/base/
enable=1
gpgcheck=0
[guoxin-epel]
name=Guoxin-$releasever - Base - http://repo.91guoxin.bj
baseurl=http://10.10.10.70:8080/7/epel/
enable=1
gpgcheck=0
[guoxin-extras]
name=Guoxin-$releasever - Base - http://repo.91guoxin.bj
baseurl=http://10.10.10.70:8080/7/extras/
enable=1
gpgcheck=0
[guoxin-updates]
name=Guoxin-$releasever - Base - http://repo.91guoxin.bj
baseurl=http://10.10.10.70:8080/7/updates/
enable=1
gpgcheck=0
[guoxin-zabbix]
name=Guoxin-$releasever - Base - http://repo.91guoxin.bj
baseurl=http://10.10.10.70:8080/7/zabbix/
enable=1
gpgcheck=0
3.时间同步
检查ntpdate
命令是否存在:
# which ntpdate
/usr/sbin/ntpdate
如果没有ntpdate
命令,则:
yum install ntpdate -y
手动同步时间:
/sbin/ntpdate 10.10.10.70 ; /sbin/clock -w
添加时间同步定时任务:
crontab -e
# Time sync
5 0 * * * /sbin/ntpdate 10.10.10.70 ; /sbin/clock -w 1>/dev/null 2>&1
检查定时任务是否添加成功:
crontab -l
4.安装常用命令包
yum install lrzsz tree vim net-tools -y
5.安装bash shell
cd /usr/local/src/
rz -y
rpm -ivh bash-4.3.30-1.el7.centos.x86_64.rpm --force
mv /bin/bash /bin/bash.bak && cp /usr/local/bin/bash /bin
6.配置rsyslog
修改配置文件:
vim /etc/rsyslog.conf
最后一行增加如下配置:
*.* @10.10.10.71
检查配置:
tail -1 /etc/rsyslog.conf
*.* @10.10.10.71
重启rsyslog
服务
systemctl restart rsyslog
7.内核参数
修改配置文件:
\vi /etc/sysctl.conf
vm.overcommit_memory = 1
net.ipv4.ip_forward = 0
net.ipv4.conf.default.rp_filter = 1
net.ipv4.conf.default.accept_source_route = 0
#kernel.sysrq = 0
#kernel.core_uses_pid = 1
net.ipv4.tcp_syncookies = 1
#kernel.msgmnb = 65536
#kernel.msgmax = 65536
#kernel.shmmax = 68719476736
#kernel.shmall = 4294967296
net.ipv4.tcp_rmem = 32768 436600 16777216
net.ipv4.tcp_wmem = 32768 436600 16777216
net.ipv4.tcp_max_orphans = 3276800
net.core.wmem_default = 8388608
net.core.rmem_default = 8388608
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_synack_retries = 1
net.ipv4.tcp_syn_retries = 2
net.ipv4.ip_local_port_range = 1024 65000
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_max_tw_buckets = 10000
net.ipv4.tcp_fin_timeout = 30
net.ipv4.tcp_keepalive_time = 1200
net.ipv4.tcp_timestamps = 0
net.ipv4.tcp_max_syn_backlog = 65536
net.core.netdev_max_backlog = 262144
fs.file-max = 102400
vm.swappiness = 5
执行sysctl -p
使配置生效:
sysctl -p
8.rm命令替换为mv
mkdir /data/dustbin -p
chmod 777 /data/dustbin
vim /etc/profile
结尾增加:
saferm ()
{
if [ ! -d /data/dustbin ]
then
mkdir -p /data/dustbin
chmod 777 /data/dustbin
if [ $? -ne 0 ]
then
echo "Error: failed to create /export/dustbin"
fi
fi
local dst=`mktemp -d -p /data/dustbin`
local arg=`echo $* | sed "s/\(^-\w\+\)\|\(\s-\w\+\)/ /g"`
mv ${arg} ${dst}
}
alias rm='saferm'
使配置生效:
. /etc/profile
9.ssh优化
运维专用账户 opsuser
# useradd opsuser -d /data/opsuser
# visudo
sudo授权
opsuser ALL=(ALL) NOPASSWD: ALL
切换到opsuser用户
su - opsuser
id opsuser
检查UID是否为1000
uid=1000(opsuser) gid=1000(opsuser) groups=1000(opsuser)
配置key认证登陆(密钥文件夹700
权限):
mkdir .ssh
chmod 700 .ssh
vim .ssh/authorized_keys
添加运维人员的公钥
.... xxx@91guoxin.com
.... xxx@91guoxin.com
密钥文件600
权限:
chmod 600 .ssh/authorized_keys
注:需检查key认证是否成功
改变监听地址
监听本机内网IP地址:
获取本机内网IP地址:
ifconfig eth0|awk -F "[ :]+" 'NR==2{print $3}'
10.10.10.136
修改ssh配置文件
vim /etc/ssh/sshd_config
ListenAddress 10.10.10.136
禁用root ssh登陆
vim /etc/ssh/sshd_config
PermitRootLogin no
重启sshd
systemctl restart sshd
检查监听地址是否生效:
netstat -lntup|grep sshd
tcp 0 0 10.10.10.136:22 0.0.0.0:* LISTEN 9997/sshd
注:还需检查root是否可以通过ssh登录
10.ulimit
echo '* soft nofile 102400' >> /etc/security/limits.conf
echo '* hard nofile 102400' >> /etc/security/limits.conf
echo '* soft nproc 102400' >> /etc/security/limits.conf
echo '* hard nproc 102400' >> /etc/security/limits.conf
ulimit -SHn 102400
ulimit -n
11.zabbix监控
yum install zabbix-agent -y
通过ansible
同步72配置文件和脚本到本地(在/data/opsuser/ansible/config/hosts
增加本机的组)
ansible -s 10.10.10.136 -m copy -a "src=/etc/zabbix/ dest=/etc/zabbix/ owner=root group=root"
重启zabbix-agent
systemctl restart zabbix-agent
登录 http://10.10.10.70/zabbix/ 增加该主机并添加模板
guoxin base
Template OS Linux
Template_Linux_Disk_IO_Stats
注:其他模板根据业务需求添加
12.加入跳板机
登陆10.10.10.71进行配置:
[root@idc01-cloud-manage-node-02 proxyd]# pwd
/usr/local/proxyd
[root@idc01-cloud-manage-node-02 proxyd]# ls
log proxyd.sh server.cfg user.cfg
注:在server.cfg添加新的服务器 并在user.cfg进行授权
13.目录规范
运维工具安装包:/usr/local/src
运维工具安装目录:/application
脚本目录:/server/scripts
日志目录:/data/logs