shell脚本介绍

  在研发过程中，不断的有项目或者产品升级，在此过程中，我们可以充分利用shell脚本去实现一些固定步骤的一键部署和升级。

配置文件

  在编写脚本前，我们可以编写一个额外的配置文件作为一键部署的入参文件，脚本可以读取到该配置文件中的变量值。届时，只需要修改配置文件内的配置，而无需更改脚本。
如：test.properties

[root@linux01 ~/test_sh]#  vim test.properties
# set parameters start

# int type
id_test=12

# string type 
str_test="test properties"

# array with white space type
array_test=(arr1 arr2 arr3)

[root@linux01 ~/test_sh]#  ll
-rw-r----- 1 root root 159 Mar 16 21:43 test.properties

shell实战

[root@linux01 ~/test_sh]#  vim test.sh
#!/bin/bash

# print start time
starttime=$(date +%Y-%m-%d\ %H:%M:%S)

# echo to log
echo "【Start to execute the script】， start time is: " $starttime   >> test_sh.log

# read properties from other file
source ./test.properties
echo "Parameters: cat test.properties" >> test_sh.log

while read line
do
 echo $line >> test_sh.log;
done < test.properties

echo "------ test.properties end------" >> test_sh.log
# ==============================================================

# create dir 
mkdir ${str_test}${id_test}
echo -e "\nmkdir dir success, and name is: "${str_test}${id_test} >> test_sh.log

# product file
for ((i=0; i<${#array_test[@]}; i++))
do
echo "now array_test i is "${#array_test[@]} >> test_sh.log
echo "This is ${array_test[i]} file " >> ${array_test[i]}_file.txt
done

# print end time
endtime=`date +"%Y-%m-%d %H:%M:%S"`

[root@linux01 ~/test_sh]#  ll
-rw-r----- 1 root root 159 Mar 16 21:43 test.properties
-rwxr-x--- 1 root root 993 Mar 16 21:45 test.sh

执行shell

注意为了简化，我们将test.properties和test.sh放到一个目录下，以便于读取配置。

[root@linux01 ~/test_sh]#  sh test.sh
[root@linux01 ~/test_sh]#  ll
total 28
-rw-r----- 1 root root   19 Mar 16 22:11 arr1_file.txt
-rw-r----- 1 root root   19 Mar 16 22:11 arr2_file.txt
-rw-r----- 1 root root   19 Mar 16 22:11 arr3_file.txt
-rw-r----- 1 root root  159 Mar 16 22:08 test.properties
drwxr-x--- 2 root root 4096 Mar 16 22:11 test_properties12
-rwxr-x--- 1 root root  969 Mar 16 22:11 test.sh
-rw-r----- 1 root root  469 Mar 16 22:11 test_sh.log

查看日志

[root@linux01 ~/test_sh]#  vim test_sh.log
【Start to execute the script】， start time is:  2020-03-16 21:57:47
Parameters: cat test.properties
# set parameters start

# int type
id_test=12

# string type
str_test="test properties"

# array with white space type
array_test=(arr1 arr2 arr3)

------ test.properties end------
          
mkdir dir success, and name is: test_properties_12
now array_test i is 3
now array_test i is 3
now array_test i is 3
【Execute the script end】, end time is:  2020-03-16 21:57:47

查看生成的文件

[root@linux01 ~/test_sh]#  vim arr1_file.txt
This is arr1 file

[root@linux01 ~/test_sh]#  vim arr2_file.txt
This is arr2 file

[root@linux01 ~/test_sh]#  vim arr3_file.txt
This is arr3 file