Shulou(Shulou.com)06/01 Report--

Upload the image file of centos to the/data directory via ftp

You can set up an ftp server on this machine

Download an image on a VM virtual machine

You can also use vmtools

Start xen virtual host installation preparation (install xen virtual machine from command line)

Install apache and create tree directory under apache root directory

# yum install httpd

# service httpd start

chkconfig httpd on

# cd /var/www/html/

mkdir tree

reboot

The requested URL/html/index.php was not found on this server.

mount -o loop/data/CentOS-6.5.iso/var/www/html/tree/ VM virtual machine needs to be remounted after restart

You can check in your browser whether the mount is successful. The page is displayed as a file.

http://127.0.0.1/tree can be tested at the terminal wget http://192.168.122.1/tree/p_w_picpaths/install.img

start the installation

yum install virt-*

yum install libvirt-*

virt-install --prompt failed

All the way to the next step IP for DHCP automatic acquisition

Fix "Unable to retrieve 192.168.0.100/var/www/html/p_w_picpaths/install.img error"

Fix "Unable to retrieve 192.168.0.100/var/www/html/p_w_picpaths/install.img error"

Analysis: We must understand at which stage this error occurs in order to correctly find the cause of the error. When this error occurs, it is already in the boot PXE boot successfully obtained ip from dhcp server,(or CD boot) are normal, and the ks file is read normally, and the installation source is found correctly. Otherwise, it will not prompt that the install.img file cannot be obtained. Generally unable to obtain a file, either the file is damaged or the network does not work.

Solution:

1) We first prove that the installation source server is normal, we use another machine to download the install.img file, using the following command:

wget http://192.168.0.100/var/www/html/p_w_picpaths/install.img

If you can download this file normally, it means that the installation source server (i.e. kickstart server) is normal.

2) The previous stage of finding the install.img file is the stage of configuring the network card and gateway. Check whether the network card part of the configuration of your ks file is not a network segment with the IP of the installation source. If it is not a network segment, it will cause network disconnection and generate this error. This question, too, has been bothering me for hours, and it's very confusing.

3)When checking the ks.cfg file, the installation method HTTP error occurs. After selecting the "HTTP" installation, the HTTP directory is added, resulting in the title error of this article. The reason for this error is that after HTTP runs, the file in the root directory of the web page (/var/www/html) will be read by default. At this time, if a directory is added to HTTP, the path is incorrect.

4)There is also a place to pay attention to is to use graphical configuration ks.cfg file in the "partition configuration" here must remember to select "clear the master boot record" this item, otherwise you will manually choose whether to "clear the master boot record or format the disk" during the automatic installation, so that you lose the meaning of the automatic installation.

2. virt-manager & can be successfully installed by using http

Select the option above

choose variant

Source path used by installation

Storage path Other can default Next

allocate entire virtual disk now allocate the entire virtual disk

ignore: ignore

re-initialize: reinitialize

Default Next step until successful installation No interface, only command line

3, the local image installation failed, you can use the image of 163, will install successfully

Create virtual machine test3

It takes a bit long to create a 6 gigabyte mirror file

dd if=/dev/sdb1 of=/data/test3.img bs=1M count=6144

create a virtual machine

virt-install -n test3 -r 512 -f /data/test3.img -l http://192.168.122.1/tree

virt-install parameter analysis

-n test3 #Name of virtual machine, here our name is CentosVM02

-r 512 #Maximum memory of the virtual machine in MB. Here we have 512 megabytes of memory.

The requested URL/data/test3.img was not found on this server.

-l http://192.168.122.1/tree #Mirror path of the system. Xen only supports FTP/HTTP/NFS http://mirrors.163.com/centos/6.7/os/x86_64/

4, the local image installation failed, you can use the image of 163, will install successfully

Start creating virtual machines from the command line

virt-install -n xentest -f /data/xentest.img -s 3 -r 782 --nographics -l http://192.168.122.1/tree http://mirrors.163.com/centos/6.7/os/x86_64/

-n Specifies the name of the virtual machine created

-f Files used as disk images

-s Size of disk image in G

-r Specifies the size of memory in M

--nographics means no graphics console is installed

-l Source of installation

Virtual Machine Tuning

The virtual machine installation is complete. Since it is a brand-new installation using OEL 5.8, the following parameters need to be modified.

Close SELINUX

vi /etc/selinux/config

Close iptables

chkconfig iptables off

restart virtual machines

reboot

1) View virtual machines

# xm list

2) Console login virtual machine

# xm console dd

Ctrl+] to open the console

3) Common xm command

The xm command can be used to start the Stop VM Start VM command as follows:

xm create vm01 #where vm01 is the virtual machine configuration file located in/etc/xen/vm01

xm create -c vm01 #If you need to start the console, run the command

xm list #lists all virtual machines

xm console #can display the console of a virtual machine

xm reboot #can reboot virtual machines with id domid

xm shutdown #can shut down virtual machines with id domid

xm shutdown #Name or DomID of the virtual operating system #Shut down the virtualized system

xm destroy #can destroy virtual machines with id domid

xm console fc5 #Log in to a running virtual operating system from a terminal or console

xm save #Store state of running virtual operating systems

xm restore #Wake up the virtual operating system

xm pause #Stop a running virtual operating system

xm unpause #Activate a stopped virtual operating system

xm mem-set #Adjust virtual platform/virtual operating system memory footprint

xm destroy #immediately stop virtual systems (important);

xm vcpu-set #Adjust the number of virtual CPUs for virtual platforms and virtual operating systems

xm top or xentop #View virtual system running status

The virtual machine is installed.

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