[英]How to enter the parameters on the command line for this shell script?
I was setting up VMWare ESXi on my laptop for learning purposes. 我出于学习目的,在笔记本电脑上设置了VMWare ESXi。 I wanted to automate things and got this very nice shell script.
我想使事情自动化,并得到了这个非常好的shell脚本。 It asks for parameters such as the cpu cores, iso path, ram and disk space.
它要求提供诸如cpu内核,iso路径,内存和磁盘空间之类的参数。 I am a beginner in the shell.
我是Shell的初学者。 I understand that it's a very basic question but couldn't find an answer on the internet.
我知道这是一个非常基本的问题,但无法在互联网上找到答案。 Here's the code.
这是代码。
I don't understand how to enter the values of <|c|i|r|s>
— the syntax required is not clear, to be precise. 我不明白如何输入
<|c|i|r|s>
-确切地说,所需的语法不清楚。
#paratmers: machine name (required), CPU (number of cores), RAM (memory size in MB), HDD Disk size (in GB), ISO (Location of ISO image, optional)
#default params: CPU: 2, RAM: 4096, DISKSIZE: 20GB, ISO: 'blank'
-
phelp() {
echo "Script for automatic Virtual Machine creation for ESX"
echo "Usage: ./create.sh options: n <|c|i|r|s>"
echo "Where n: Name of VM (required), c: Number of virtual CPUs, i: location of an ISO image, r: RAM size in MB, s: Disk size in GB"
echo "Default values are: CPU: 2, RAM: 4096MB, HDD-SIZE: 20GB"
}
CPU=2
RAM=4096
SIZE=20
ISO="ISO'S"
FLAG=true
ERR=false
n=vmoo
while getopts n:c:i:r:s: option
do
case $option in
n)
NAME=${OPTARG};
FLAG=false;
if [ -z $NAME ]; then
ERR=true
MSG="$MSG | Please make sure to enter a VM name."
fi
;;
c)
CPU=${OPTARG}
if [ `echo "$CPU" | egrep "^-?[0-9]+$"` ]; then
if [ "$CPU" -le "0" ] || [ "$CPU" -ge "32" ]; then
ERR=true
MSG="$MSG | The number of cores has to be between 1 and 32."
fi
else
ERR=true
MSG="$MSG | The CPU core number has to be an integer."
fi
;;
i)
ISO=${OPTARG}
if [ ! `echo "$ISO" | egrep "^.*\.(iso)$"` ]; then
ERR=true
MSG="$MSG | The extension should be .iso"
fi
;;
r)
RAM=${OPTARG}
if [ `echo "$RAM" | egrep "^-?[0-9]+$"` ]; then
if [ "$RAM" -le "0" ]; then
ERR=true
MSG="$MSG | Please assign more than 1MB memory to the VM."
fi
else
ERR=true
MSG="$MSG | The RAM size has to be an integer."
fi
;;
s)
SIZE=${OPTARG}
if [ `echo "$SIZE" | egrep "^-?[0-9]+$"` ]; then
if [ "$SIZE" -le "0" ]; then
ERR=true
MSG="$MSG | Please assign more than 1GB for the HDD size."
fi
else
ERR=true
MSG="$MSG | The HDD size has to be an integer."
fi
;;
\?) echo "Unknown option: -$OPTARG" >&2; phelp; exit 1;;
:) echo "Missing option argument for -$OPTARG" >&2; phelp; exit 1;;
*) echo "Unimplimented option: -$OPTARG" >&2; phelp; exit 1;;
esac
done
if $FLAG; then
echo "You need to at least specify the name of the machine with the -n parameter."
exit 1
fi
if $ERR; then
echo $MSG
exit 1
fi
if [ -d "$NAME" ]; then
echo "Directory - ${NAME} already exists, can't recreate it."
exit
fi
mkdir ${NAME}
vmkfstools -c "${SIZE}"G -a lsilogic $NAME/$NAME.vmdk
touch $NAME/$NAME.vmx
cat << EOF > $NAME/$NAME.vmx
config.version = "8"
virtualHW.version = "7"
vmci0.present = "TRUE"
displayName = "${NAME}"
floppy0.present = "FALSE"
numvcpus = "${CPU}"
scsi0.present = "TRUE"
scsi0.sharedBus = "none"
scsi0.virtualDev = "lsilogic"
memsize = "${RAM}"
scsi0:0.present = "TRUE"
scsi0:0.fileName = "${NAME}.vmdk"
scsi0:0.deviceType = "scsi-hardDisk"
ide1:0.present = "TRUE"
ide1:0.fileName = "${ISO}"
ide1:0.deviceType = "cdrom-image"
pciBridge0.present = "TRUE"
pciBridge4.present = "TRUE"
pciBridge4.virtualDev = "pcieRootPort"
pciBridge4.functions = "8"
pciBridge5.present = "TRUE"
pciBridge5.virtualDev = "pcieRootPort"
pciBridge5.functions = "8"
pciBridge6.present = "TRUE"
pciBridge6.virtualDev = "pcieRootPort"
pciBridge6.functions = "8"
pciBridge7.present = "TRUE"
pciBridge7.virtualDev = "pcieRootPort"
pciBridge7.functions = "8"
ethernet0.pciSlotNumber = "32"
ethernet0.present = "TRUE"
ethernet0.virtualDev = "e1000"
ethernet0.networkName = "Inside"
ethernet0.generatedAddressOffset = "0"
guestOS = "other26xlinux-64"
EOF
MYVM=`vim-cmd solo/registervm /vmfs/volumes/datastore1/${NAME}/${NAME}.vmx`
vim-cmd vmsvc/power.on $MYVM
echo "The Virtual Machine is now setup & the VM has been started up. Your have the following configuration:"
echo "Name: ${NAME}"
echo "CPU: ${CPU}"
echo "RAM: ${RAM}"
echo "HDD-size: ${SIZE}"
if [ -n "$ISO" ]; then
echo "ISO: ${ISO}"
else
echo "No ISO added."
fi
echo "Thank you."
exit
Enter them as -k value
pairs, where k
is the letter used to identify the parameter. 将它们输入为
-k value
对,其中k
是用于标识参数的字母。
For instance: 例如:
./create.sh -n vmname -c 2 -i /path/to/file.iso -s 512
This sets the name to vmname
, the number of CPUs to 2, the ISO filename to /path/to/file.iso
, etc. 这
vmname
名称设置为vmname
,将CPU数量设置为2,将ISO文件名设置为/path/to/file.iso
等。
The usage message is about as unhelpful as you can get and still make an attempt at conveying information. 使用消息大约对您无济于事,并且仍在尝试传达信息。 Without the code, I would not have known what to do.
没有代码,我将不知道该怎么办。 Fortunately, with shell scripts, you can see the code, though.
幸运的是,使用shell脚本,您可以看到代码。 The usage message should read something more like:
使用情况消息应更像:
{
echo "Usage: $0 -n 'vm name' [-c cpus][-i iso-image][-r ram][-s disk]"
echo " -n 'vm name' Name of VM (required)"
echo " -c cpus Number of virtual CPUs"
echo " -i iso-image Location of an ISO image"
echo " -r ram RAM size in MB"
echo " -s disk Disk size in GB"
echo "Default values are: CPU: 2, RAM: 4096MB, HDD-SIZE: 20GB"
} >&2
Take heed: when you write a shell script, ensure that the usage information is clearly documented, either in the usage message or perhaps in comments within the script. 请注意:编写Shell脚本时,请确保在用法消息或脚本内的注释中清楚记录了用法信息。 The shell script you show is an example of how not to do it.
您显示的shell脚本是如何不执行此操作的示例。
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