16.Shell实战项目¶
1. 系统巡检¶
1.1 需求¶
需要对Linux服务器，巡检系统/服务/端口各指标及参数，编写系统快速检查脚本，输出系统信息到脚本运行的 logs 目录下。
1.2 思路¶
通常系统的状态都在/proc/目录下，对文件中的关注系统指标数字进行过滤处理，得到系统状态，其中涉及数组的需要计算，可以利用函数，对每一个需要巡检的结果利用单独一个函数编写，最后利用main函数调用其他函数得出最终结果。
1.3 实现¶
核心利用sed代码：
#!/bin/bash
# auth:kaliarch
# func:sys info check
# version:v1.0
# sys:centos6.x/7.x
[ $(id -u) -gt 0 ] && echo "请用root用户执行此脚本！" && exit 1
sysversion=$(rpm -q centos-release|cut -d- -f3)
line="-------------------------------------------------"
[ -d logs ] || mkdir logs
sys_check_file="logs/$(ip a show dev eth0|grep -w inet|awk '{print $2}'|awk -F '/' '{print $1}')-`date +%Y%m%d`.txt"
# 获取系统cpu信息
function get_cpu_info() {
Physical_CPUs=$(grep "physical id" /proc/cpuinfo| sort | uniq | wc -l)
Virt_CPUs=$(grep "processor" /proc/cpuinfo | wc -l)
CPU_Kernels=$(grep "cores" /proc/cpuinfo|uniq| awk -F ': ' '{print $2}')
CPU_Type=$(grep "model name" /proc/cpuinfo | awk -F ': ' '{print $2}' | sort | uniq)
CPU_Arch=$(uname -m)
cat <<EOF | column -t
CPU信息:
物理CPU个数: $Physical_CPUs
逻辑CPU个数: $Virt_CPUs
每CPU核心数: $CPU_Kernels
CPU型号: $CPU_Type
CPU架构: $CPU_Arch
EOF
}
# 获取系统内存信息
function get_mem_info() {
check_mem=$(free -m)
MemTotal=$(grep MemTotal /proc/meminfo| awk '{print $2}') #KB
MemFree=$(grep MemFree /proc/meminfo| awk '{print $2}') #KB
let MemUsed=MemTotal-MemFree
MemPercent=$(awk "BEGIN {if($MemTotal==0){printf 100}else{printf \"%.2f\",$MemUsed*100/$MemTotal}}")
report_MemTotal="$((MemTotal/1024))""MB" #内存总容量(MB)
report_MemFree="$((MemFree/1024))""MB" #内存剩余(MB)
report_MemUsedPercent="$(awk "BEGIN {if($MemTotal==0){printf 100}else{printf \"%.2f\",$MemUsed*100/$MemTotal}}")""%" #内存使用率%
cat <<EOF
内存信息：
${check_mem}
EOF
}
# 获取系统网络信息
function get_net_info() {
pri_ipadd=$(ip a show dev eth0|grep -w inet|awk '{print $2}'|awk -F '/' '{print $1}')
pub_ipadd=$(curl ifconfig.me -s)
gateway=$(ip route | grep default | awk '{print $3}')
mac_info=$(ip link| egrep -v "lo"|grep link|awk '{print $2}')
dns_config=$(egrep -v "^$|^#" /etc/resolv.conf)
route_info=$(route -n)
cat <<EOF | column -t
IP信息:
系统公网地址: ${pub_ipadd}
系统私网地址: ${pri_ipadd}
网关地址: ${gateway}
MAC地址: ${mac_info}
路由信息:
${route_info}
DNS 信息:
${dns_config}
EOF
}
# 获取系统磁盘信息
function get_disk_info() {
disk_info=$(fdisk -l|grep "Disk /dev"|cut -d, -f1)
disk_use=$(df -hTP|awk '$2!="tmpfs"{print}')
disk_inode=$(df -hiP|awk '$1!="tmpfs"{print}')
cat <<EOF
磁盘信息:
${disk_info}
磁盘使用:
${disk_use}
inode信息:
${disk_inode}
EOF
}
# 获取系统信息
function get_systatus_info() {
sys_os=$(uname -o)
sys_release=$(cat /etc/redhat-release)
sys_kernel=$(uname -r)
sys_hostname=$(hostname)
sys_selinux=$(getenforce)
sys_lang=$(echo $LANG)
sys_lastreboot=$(who -b | awk '{print $3,$4}')
sys_runtime=$(uptime |awk '{print $3,$4}'|cut -d, -f1)
sys_time=$(date)
sys_load=$(uptime |cut -d: -f5)
cat <<EOF | column -t
系统信息:
系统: ${sys_os}
发行版本: ${sys_release}
系统内核: ${sys_kernel}
主机名: ${sys_hostname}
selinux状态: ${sys_selinux}
系统语言: ${sys_lang}
系统当前时间: ${sys_time}
系统最后重启时间: ${sys_lastreboot}
系统运行时间: ${sys_runtime}
系统负载: ${sys_load}
EOF
}
# 获取服务信息
function get_service_info() {
port_listen=$(netstat -lntup|grep -v "Active Internet")
kernel_config=$(sysctl -p 2>/dev/null)
if [ ${sysversion} -gt 6 ];then
service_config=$(systemctl list-unit-files --type=service --state=enabled|grep "enabled")
run_service=$(systemctl list-units --type=service --state=running |grep ".service")
else
service_config=$(/sbin/chkconfig | grep -E ":on|:启用" |column -t)
run_service=$(/sbin/service --status-all|grep -E "running")
fi
cat <<EOF
服务启动配置:
${service_config}
${line}
运行的服务:
${run_service}
${line}
监听端口:
${port_listen}
${line}
内核参考配置:
${kernel_config}
EOF
}
function get_sys_user() {
login_user=$(awk -F: '{if ($NF=="/bin/bash") print $0}' /etc/passwd)
ssh_config=$(egrep -v "^#|^$" /etc/ssh/sshd_config)
sudo_config=$(egrep -v "^#|^$" /etc/sudoers |grep -v "^Defaults")
host_config=$(egrep -v "^#|^$" /etc/hosts)
crond_config=$(for cronuser in /var/spool/cron/* ;do ls ${cronuser} 2>/dev/null|cut -d/ -f5;egrep -v "^$|^#" ${cronuser} 2>/dev/null;echo "";done)
cat <<EOF
系统登录用户:
${login_user}
${line}
ssh 配置信息:
${ssh_config}
${line}
sudo 配置用户:
${sudo_config}
${line}
定时任务配置:
${crond_config}
${line}
hosts 信息:
${host_config}
EOF
}
function process_top_info() {
top_title=$(top -b n1|head -7|tail -1)
cpu_top10=$(top b -n1 | head -17 | tail -10)
mem_top10=$(top -b n1|head -17|tail -10|sort -k10 -r)
cat <<EOF
CPU占用top10:
${top_title}
${cpu_top10}
内存占用top10:
${top_title}
${mem_top10}
EOF
}
function sys_check() {
get_cpu_info
echo ${line}
get_mem_info
echo ${line}
get_net_info
echo ${line}
get_disk_info
echo ${line}
get_systatus_info
echo ${line}
get_service_info
echo ${line}
get_sys_user
echo ${line}
process_top_info
}
sys_check > ${sys_check_file}
1.4 测试¶
[root@master workspace]# bash sys_check.sh
[root@master workspace]# ls
logs sys_check.sh
[root@master workspace]# cat logs/172.16.60.2-20200419.txt
CPU信息:
物理CPU个数: 4
逻辑CPU个数: 4
每CPU核心数: 1
CPU型号: QEMU Virtual CPU
CPU架构: x86_64
-------------------------------------------------
内存信息：
total used free shared buff/cache available
Mem: 16047 12536 179 885 3331 2007
Swap: 0 0 0
-------------------------------------------------
IP信息:
系统公网地址: 4x.xxx.xxx.18
系统私网地址: 172.16.60.2
网关地址: 172.16.60.1
MAC地址: 52:54:73:7b:c9:11
路由信息:
Kernel IP routing table
Destination Gateway Genmask Flags Metric Ref Use Iface
0.0.0.0 172.16.60.1 0.0.0.0 UG 100 0 0 eth0
10.233.88.192 172.16.60.5 255.255.255.192 UG 0 0 0 tunl0
172.16.60.0 0.0.0.0 255.255.255.0 U 100 0 0 eth0
172.17.0.0 0.0.0.0 255.255.0.0 U 0 0 0 docker0
DNS 信息:
nameserver 10.17.50.3
nameserver 1.2.4.8
-------------------------------------------------
磁盘信息:
Disk /dev/vda: 21.5 GB
Disk /dev/vdb: 8589 MB
磁盘使用:
Filesystem Type Size Used Avail Use% Mounted on
/dev/vda1 ext4 20G 5.0G 14G 27% /
devtmpfs devtmpfs 7.9G 0 7.9G 0% /dev
/dev/vdc ext4 197G 46G 142G 25% /data
/dev/vdd xfs 500G 53G 448G 11% /var/local/osd0
inode信息:
Filesystem Inodes IUsed IFree IUse% Mounted on
/dev/vda1 1.3M 54K 1.2M 5% /
devtmpfs 2.0M 398 2.0M 1% /dev
/dev/vdc 13M 1.3M 12M 11% /data
/dev/vdd 250M 14K 250M 1% /var/local/osd0
overlay 13M 1.3M 12M 11% 2c99089efbac12ffc5d7a8f6ccf99d95ab3c1674b441205a61829ebe635/merged
系统: GNU/Linux
发行版本: CentOS Linux release 7.4.1708 (Core)
系统内核: 3.10.0-693.el7.x86_64
主机名: master
selinux状态: Permissive
系统语言: en_US.UTF-8
系统当前时间: Sun Apr 19 12:34:35 CST 2020
系统最后重启时间: 2020-03-18 16:15
系统运行时间: 31 days
系统负载: 1.55, 1.73, 1.95
-------------------------------------------------
服务启动配置:
auditd.service enabled
autovt@.service enabled
ceph-mon@.service enabled
etcd.service enabled
gapd.service enabled
getty@.service enabled
irqbalance.service enabled
kdump.service enabled
kubelet.service enabled
microcode.service enabled
NetworkManager-dispatcher.service enabled
NetworkManager.service enabled
postfix.service enabled
rpcbind.service enabled
rsyslog.service enabled
smarteye-server-agent.service enabled
sshd.service enabled
systemd-readahead-collect.service enabled
systemd-readahead-drop.service enabled
systemd-readahead-replay.service enabled
tuned.service enabled
-------------------------------------------------
运行的服务:
auditd.service loaded active running Security Auditing Service
ceph-mon@master.service loaded active running Ceph cluster monitor daemon
ceph-osd@0.service loaded active running Ceph object storage daemon
chronyd.service loaded active running NTP client/server
crond.service loaded active running Command Scheduler
dbus.service loaded active running D-Bus System Message Bus
docker.service loaded active running Docker Application Container Engine
etcd.service loaded active running etcd docker wrapper
gapd.service loaded active running guest agent for pitrix
getty@tty1.service loaded active running Getty on tty1
gssproxy.service loaded active running GSSAPI Proxy Daemon
irqbalance.service loaded active running irqbalance daemon
kubelet.service loaded active running Kubernetes Kubelet Server
NetworkManager.service loaded active running Network Manager
polkit.service loaded active running Authorization Manager
postfix.service loaded active running Postfix Mail Transport Agent
rpcbind.service loaded active running RPC bind service
rsyslog.service loaded active running System Logging Service
smarteye-server-agent.service loaded active running The Smarteye Monitoring of server
sshd.service loaded active running OpenSSH server daemon
systemd-journald.service loaded active running Journal Service
systemd-logind.service loaded active running Login Service
systemd-udevd.service loaded active running udev Kernel Device Manager
tuned.service loaded active running Dynamic System Tuning Daemon
-------------------------------------------------
监听端口:
Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name
tcp 0 0 127.0.0.1:9099 0.0.0.0:* LISTEN 10444/calico-node
tcp 0 0 172.16.60.2:2379 0.0.0.0:* LISTEN 1321/etcd
tcp 0 0 127.0.0.1:2379 0.0.0.0:* LISTEN 1321/etcd
tcp 0 0 172.16.60.2:9100 0.0.0.0:* LISTEN 2868/./kube-rbac-pr
tcp 0 0 127.0.0.1:9100 0.0.0.0:* LISTEN 2314/node_exporter
tcp 0 0 172.16.60.2:2380 0.0.0.0:* LISTEN 1321/etcd
tcp 0 0 172.16.60.2:10255 0.0.0.0:* LISTEN 1222/kubelet
tcp 0 0 0.0.0.0:111 0.0.0.0:* LISTEN 1/systemd
tcp 0 0 0.0.0.0:6800 0.0.0.0:* LISTEN 850/ceph-osd
tcp 0 0 0.0.0.0:6801 0.0.0.0:* LISTEN 850/ceph-osd
tcp 0 0 0.0.0.0:6802 0.0.0.0:* LISTEN 850/ceph-osd
tcp 0 0 0.0.0.0:179 0.0.0.0:* LISTEN 10755/bird
tcp 0 0 0.0.0.0:6803 0.0.0.0:* LISTEN 850/ceph-osd
tcp 0 0 169.254.25.10:53 0.0.0.0:* LISTEN 2058/node-cache
tcp 0 0 0.0.0.0:22 0.0.0.0:* LISTEN 552/sshd
tcp 0 0 127.0.0.1:25 0.0.0.0:* LISTEN 786/master
tcp 0 0 127.0.0.1:40416 0.0.0.0:* LISTEN 1222/kubelet
tcp 0 0 172.16.60.2:6789 0.0.0.0:* LISTEN 661/ceph-mon
tcp 0 0 169.254.25.10:9254 0.0.0.0:* LISTEN 2058/node-cache
tcp 0 0 127.0.0.1:10248 0.0.0.0:* LISTEN 1222/kubelet
tcp 0 0 127.0.0.1:10249 0.0.0.0:* LISTEN 2854/kube-proxy
tcp 0 0 172.16.60.2:10250 0.0.0.0:* LISTEN 1222/kubelet
tcp6 0 0 :::10251 :::* LISTEN 12358/kube-schedule
tcp6 0 0 :::6443 :::* LISTEN 1929/kube-apiserver
tcp6 0 0 :::10252 :::* LISTEN 12366/kube-controll
udp6 0 0 :::111 :::* 1/systemd
udp6 0 0 ::1:323 :::* 530/chronyd
udp6 0 0 :::703 :::* 535/rpcbind
-------------------------------------------------
内核参考配置:
net.ipv4.ip_forward = 1
net.bridge.bridge-nf-call-ip6tables = 1
net.bridge.bridge-nf-call-iptables = 1
net.ipv4.ip_local_reserved_ports = 30000-32767
net.bridge.bridge-nf-call-arptables = 1
-------------------------------------------------
系统登录用户:
root:x:0:0:root:/root:/bin/bash
-------------------------------------------------
ssh 配置信息:
HostKey /etc/ssh/ssh_host_rsa_key
HostKey /etc/ssh/ssh_host_ecdsa_key
HostKey /etc/ssh/ssh_host_ed25519_key
SyslogFacility AUTHPRIV
AuthorizedKeysFile .ssh/authorized_keys
PasswordAuthentication yes
ChallengeResponseAuthentication no
GSSAPIAuthentication no
GSSAPICleanupCredentials no
UsePAM yes
X11Forwarding yes
AcceptEnv LANG LC_CTYPE LC_NUMERIC LC_TIME LC_COLLATE LC_MONETARY LC_MESSAGES
AcceptEnv LC_PAPER LC_NAME LC_ADDRESS LC_TELEPHONE LC_MEASUREMENT
AcceptEnv LC_IDENTIFICATION LC_ALL LANGUAGE
AcceptEnv XMODIFIERS
Subsystem sftp /usr/libexec/openssh/sftp-server
PermitRootLogin yes
PermitEmptyPasswords no
UseDNS no
-------------------------------------------------
sudo 配置用户:
root ALL=(ALL) ALL
%wheel ALL=(ALL) ALL
-------------------------------------------------
定时任务配置:
root
@weekly /usr/bin/docker system prune -f
*/30 * * * * /opt/etcd_back/etcd_backup.sh
-------------------------------------------------
hosts 信息:
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost6 localhost6.localdomain6 localhost6.localdomain
172.16.60.2 master
172.16.60.3 node01
172.16.60.4 node02
172.16.60.5 node03
172.16.60.2 master.cluster.local master
172.16.60.3 node01.cluster.local node01
172.16.60.4 node02.cluster.local node02
172.16.60.5 node03.cluster.local node03
172.16.60.2 harbor.devops.kubesphere.local
172.16.60.2 gitlab.devops.kubesphere.local
-------------------------------------------------
CPU占用top10:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1222 root 20 0 1401200 142324 19560 S 11.8 0.9 6197:32 kubelet
7119 root 20 0 144632 16016 4840 S 5.9 0.1 263:45.19 coredns
9761 1001 20 0 133952 19360 3444 S 5.9 0.1 589:46.42 jaeger-operator
12366 root 20 0 821212 130924 21304 S 5.9 0.8 20:30.77 kube-controller
15129 root 20 0 169104 39880 6176 S 5.9 0.2 212:52.15 mixs
15251 root 20 0 157848 2148 1408 R 5.9 0.0 0:00.02 top
19934 root 20 0 10.074g 26564 4612 S 5.9 0.2 342:47.40 etcd
1 root 20 0 194876 6912 2996 S 0.0 0.0 7:21.74 systemd
2 root 20 0 0 0 0 S 0.0 0.0 0:09.02 kthreadd
3 root 20 0 0 0 0 S 0.0 0.0 20:13.67 ksoftirqd/0
内存占用top10:
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1929 root 20 0 1667544 832556 23912 S 11.8 5.1 5571:22 kube-apiserver
12967 root 20 0 9.914g 6.834g 1580 S 5.9 43.6 3672:00 java
28651 polkitd 20 0 4161568 217472 2180 S 5.9 1.3 185:46.09 java
1321 root 20 0 10.188g 170880 18380 S 11.8 1.0 2154:47 etcd
12366 root 20 0 821212 130924 21304 S 5.9 0.8 20:30.78 kube-controller
661 ceph 20 0 463516 67048 4476 S 5.9 0.4 280:35.51 ceph-mon
17654 root 20 0 167812 11044 2808 S 5.9 0.1 9:13.12 envoy
1 root 20 0 194876 6912 2996 S 0.0 0.0 7:21.74 systemd
15255 root 20 0 157848 2152 1408 R 11.8 0.0 0:00.03 top
14093 polkitd 20 0 288608 6848 4208 S 5.9 0.0 0:00.02 postgres
2 ELK安装¶
2.1 需求¶
对于软件安装，通常人工操作不仅繁琐耗时，且易出错，可以用编写Shell来完成，后期如果有重复需求，可以一劳永逸，安装不易出错且提升效率，ELK为开源日志系统 由 Elasticsearch、Logstash 和 Kibana 三部分组件组成。
2.2 思路¶
可以针对需要按照的各服务单独编写脚本来进行按照，其中利用了系统内的很多命令，也包含文件的操作等，在此刚好回顾我们之前学习的内容。
2.3 实现¶
#!/bin/bash
#mail:xuel@anchnet.com
#data:2020/4/10
#AutoInstall ELK scripts
#Software:elasticsearch-5.4.1/logstash-5.4.1/filebeat-5.4.1/kibana-5.4.1
clear
echo "##########################################"
echo "# Auto Install ELK. ##"
echo "# Press Ctrl + C to cancel ##"
echo "# Any key to continue ##"
echo "##########################################"
read -p
# 定义变量
software_dir="/usr/local/software"
elasticsearch_url="https://artifacts.elastic.co/downloads/elasticsearch/elasticsearch-5.4.1.tar.gz"
kibana_url="https://artifacts.elastic.co/downloads/kibana/kibana-5.4.1-linux-x86_64.tar.gz"
logstash_url="https://artifacts.elastic.co/downloads/logstash/logstash-5.4.1.tar.gz"
filebeat_url="https://artifacts.elastic.co/downloads/beats/filebeat/filebeat-5.4.1-linux-x86_64.tar.gz"
sys_version=`cat /etc/redhat-release |awk '{print $4}'|cut -d. -f1`
IP=`ip addr|grep "inet "|grep -v 127.0.0.1|awk '{print $2}'|cut -d/ -f1`
jvm_conf="/usr/local/elasticsearch/config/jvm.options"
sys_mem=`free -m|grep Mem:|awk '{print $2}'|awk '{sum+=$1} END {print sum/1024}'|cut -d. -f1`
#wget software
wget_fun() {
if [ ! -d ${software_dir} ];then
mkdir -p ${software_dir} && cd ${software_dir}
else
cd ${software_dir}
fi
for software in $elasticsearch_url $kibana_url $logstash_url $filebeat_url
do
wget -c $software
done
clear
}
#initial system:install java wget;set hostname;disable firewalld
init_sys() {
[ -f /etc/init.d/functions ] && . /etc/init.d/functions
[ "${sys_version}" != "7" ] && echo "Error:This Scripts Support Centos7.xx" && exit 1
[ $(id -u) != "0" ] && echo "Error: You must be root to run this script" && exit 1
sed -i "s/SELINUX=enforcing/SELINUX=disabled/" /etc/selinux/config
setenforce 0
yum install -y java-1.8.0-openjdk wget net-tools
hostnamectl set-hostname elk-server
systemctl stop firewalld
cat >>/etc/security/limits.conf<<EOF
* soft nofile 65536
* hard nofile 65536
* soft nproc 65536
* hard nproc 65536
EOF
}
#install elasticsearch
install_elasticsearch() {
cd $software_dir
tar zxf elasticsearch-5.4.1.tar.gz
mv elasticsearch-5.4.1 /usr/local/elasticsearch
mkdir -p /usr/local/elasticsearch/data /usr/local/elasticsearch/logs
useradd elasticsearch
chown -R elasticsearch:elasticsearch /usr/local/elasticsearch
echo "vm.max_map_count = 655360" >>/etc/sysctl.conf && sysctl -p
if [ ${sys_mem} -eq 0 ];then
sed -i "s#`grep "^-Xmx" ${jvm_conf}`#"-Xmx512m"#g" ${jvm_conf}
sed -i "s#`grep "^-Xms" ${jvm_conf}`#"-Xms512m"#g" ${jvm_conf}
else
sed -i "s#`grep "^-Xmx" ${jvm_conf}`#"-Xmx${sys_mem}g"#g" ${jvm_conf}
sed -i "s#`grep "^-Xms" ${jvm_conf}`#"-Xms${sys_mem}g"#g" ${jvm_conf}
fi
cat >>/usr/local/elasticsearch/config/elasticsearch.yml<<EOF
cluster.name: my-application
node.name: elk-server
path.data: /usr/local/elasticsearch/data
path.logs: /usr/local/elasticsearch/logs
network.host: 127.0.0.1
http.port: 9200
discovery.zen.ping.unicast.hosts: ["elk-server"]
EOF
su - elasticsearch -c "nohup /usr/local/elasticsearch/bin/elasticsearch &"
}
#install logstash
install_logstash() {
cd $software_dir
tar -zxf logstash-5.4.1.tar.gz
mv logstash-5.4.1 /usr/local/logstash
cat>/usr/local/logstash/config/01-syslog.conf<<EOF
input {
beats {
port => "5044"
}
}
output {
elasticsearch {
hosts => "127.0.0.1:9200"
}
stdout { codec => rubydebug }
}
EOF
nohup /usr/local/logstash/bin/logstash -f /usr/local/logstash/config/01-syslog.conf & >/dev/null
}
#install filebeat
install_filebeat() {
cd $software_dir
tar -zxf filebeat-5.4.1-linux-x86_64.tar.gz
mv filebeat-5.4.1-linux-x86_64 /usr/local/filebeat
cat >/usr/local/filebeat/filebeat.yml<<EOF
filebeat.prospectors:
- input_type: log
paths:
- /var/log/*.log
output.logstash:
hosts: ["127.0.0.1:5044"]
EOF
cd /usr/local/filebeat/
nohup /usr/local/filebeat/filebeat & >/dev/null
}
#install kibana
install_kibana() {
cd $software_dir
tar -zxf kibana-5.4.1-linux-x86_64.tar.gz
mv kibana-5.4.1-linux-x86_64 /usr/local/kibana
cat >> /usr/local/kibana/config/kibana.yml <<EOF
server.port: 5601
server.host: "0.0.0.0"
elasticsearch.url: "http://127.0.0.1:9200"
EOF
nohup /usr/local/kibana/bin/kibana & >/dev/null
}
check() {
port=$1
program=$2
check_port=`netstat -lntup|grep ${port}|wc -l`
check_program=`ps -ef|grep ${program}|grep -v grep|wc -l`
if [ $check_port -gt 0 ] && [ $check_program -gt 0 ];then
action "${program} run is ok!" /bin/true
else
action "${program} run is error!" /bin/false
fi
}
main() {
init_sys
wget_fun
install_elasticsearch
install_filebeat
install_logstash
install_kibana
echo -e "\033[32m Checking Elasticsearch...\033[0m"
sleep 20
check :9200 "elasticsearch"
echo -e "\033[32m Checking Logstash...\033[0m"
sleep 2
check ":9600" "logstash"
echo -e "\033[32m Checking Kibana...\033[0m"
sleep 2
check ":5601" "kibana"
action "ELK install is success!" /bin/true
echo "url:http://$IP:5601"
}
main
2.4 测试¶
安装完成访问http://IP:5601即可，注意IP地址为按照ELK的服务器IP地址。
3. 小结¶
本章节我们简单的列举了两个具体实例，来实战Shell脚本编写处理具体问题，至此就结束了Shell的全部章节，在此希望本文可以带给大家Shell学习的一些思路过方法。
学习Shell需要多动手实践，在日常编写中举一反三，针对一个脚本如何能无状态，更健壮，更灵活易维护，需要多次的修改，反复的执行验证，针对不同的应用场景，将数据抽象为参数进行传递，可以达到是事半功倍的效果。注意将有限的精力放在热点知识上，其他工具或命令的常用选项或参数牢记即可，其他不常用选项不建议死记硬背，活用—help或man手册查看，这样在后期的 Shell 编写中能够更加的快速高效。