CN105278999A - A Safe and Efficient Virtual Machine Software Deployment Method - Google Patents

Abstract

The invention relates to the technical field of cloud computing, in particular to a safe and efficient virtual machine software deployment method. The method comprises the following basic steps: 1. firstly, copying a mirror image, and snapshotting the mirror image; 2. mounting the snapshot file to a directory; 3. downloading software to be deployed by ftp, and copying the software to a mounting directory; 4. switching to a mount directory, executing a root command, and using the mount directory as a root directory; 5. executing the application software deployment configuration script to complete deployment; 6. executing the command to quit the snapshot mounting directory; 7. if a user creates a plurality of same application virtual machines, copying a snapshot file for a plurality of times; 8. and starting the virtual machine, and finishing the deployment of the application by the virtual machine. According to the invention, an agent does not need to be installed in the virtual machine to assist in completing the deployment of the software, so that the safety coefficient is higher, and the process is simpler; the universality is higher, and the time overhead is less; the method can be used for virtual machine software deployment.

Description

A Safe and Efficient Virtual Machine Software Deployment Method

technical field

The invention relates to the technical field of cloud computing, in particular to a method for deploying safe and efficient virtual machine software.

Background technique

In the field of cloud computing, the cloud platform can provide virtual machines, and then need to deploy application software on the virtual machines. It usually takes a lot of time for professionals to deploy a complex application software. Now the cloud platform has started to provide automatic software deployment services, so that deploying applications only needs to click on the page to select the application to be installed, instead of operating in the background. At present, there are usually three ways to implement cloud platform virtual machine deployment software:

method one

Command, copy an image, and then start the virtual machine;

So, configure the virtual machine network to ensure that the virtual machine can access the ftp server where the application is stored and access the cloud platform;

3. The virtual machine sends a request to the cloud platform to obtain application information;

4. Download the application software from ftp, and then execute the deployment configuration script.

way two

1. Select the master image template file to be started;

2. Select the appropriate software template file under the operating system;

3. The master image file is merged with the template file;

4. Start the virtual machine after the merge is complete.

way three

1. System PXE network boot;

2. The system obtains dhcp to assign ip and boot image files and configure kickstart files;

3. Install the corresponding application software according to the kickstart file;

4. Restart the system.

Method 1 has the following disadvantages:

The order and virtual machine must be started to install, and it depends on the network. The virtual interior needs to access the ftp server and cloud platform, so a gent needs to be installed inside the virtual machine. For customers who value security more, installation and gent may not be allowed, so automatic software deployment cannot be realized.

2. If the customer deploys the same application, the above process needs to be executed again, and the time consumed is proportional to the number of virtual machines.

Method 2 has the following disadvantages:

1. The application software requirements required by customers are different, and a large number of software template files need to be prepared, which consumes storage space.

2. The software template file can only target one type of parent image file.

3. Merging the parent image file and the software image file is a time-consuming task, and if multiple virtual machines are created, the time required is proportional to the number of virtual machines.

Method 3 has the following disadvantages

1. The installation is complicated, which is essentially the process of installing the system on the network. Each system needs to be installed repeatedly, without reusability, and the time consumption is relatively large.

2. PXE network installation is generally suitable for deploying physical machine systems, but not for virtual machines. Virtual machines have system images, and there is no need to reinstall the operating system.

Contents of the invention

The technical problem solved by the present invention is to provide a method for safe and efficient virtual machine software deployment, which does not need to install an agent in the virtual machine to assist in the completion of software deployment, with higher safety factor and simpler process; higher versatility and less time There is even less overhead.

The technical scheme that the present invention solves the problems of the technologies described above is:

Described method comprises the steps:

Step 1: First copy a mirror image and take a snapshot of the mirror image;

The steps are as follows: mount the snapshot file to a directory;

Step 3: Download the software to be deployed via ftp and copy it to the mount directory;

Step 4: Switch to the mount directory and execute the chroot command to use the mount directory as the root directory;

Step 5: Execute the application software deployment configuration script to complete the deployment;

Step 6: Execute the command to exit the snapshot mounting directory;

Step 7: If the user creates multiple virtual machines of the same application, then copy the snapshot files multiple times;

Step 8: Start the virtual machine, and the virtual machine deployment application is completed.

The image described above is a virtual machine system image, and the root format of the image file is qcow2; the snapshot adopts an external snapshot method, and an additional qcow2 file will be generated;

Mounting the snapshot file to a directory means using the mount command to mount the snapshot file to a certain directory in a readable and writable manner.

The software that needs to be deployed by the virtual machine is usually placed on the ftp server, and the script file for how to deploy the configuration is also placed on the ftp server.

Execute the chroot command in the background of the cloud platform. The chroot command is to switch the mounting directory to the root directory, which is equivalent to switching to the mirror system.

The execution of the application software deployment configuration script is a collection of scripts executed after switching to the mirroring system.

The method of the present invention is used to deploy virtual machine software; there is no need to start a virtual machine, a large number of software template files, and a network installation system; there is no need to install an agent in a virtual machine to assist in completing software deployment, so the safety factor is higher. And the process is simpler; the versatility is higher, and the time overhead is less.

Description of drawings

Below in conjunction with accompanying drawing, the present invention is further described:

Fig. 1 is a flowchart of the present invention.

detailed description

As shown in Figure 1, the virtual machine software deployment of the present invention mainly includes the following steps:

1. Copy the image and mirror the snapshot

#qemu-imgcreate-bCentOS-7-x86_64-GenericCloud-20140826_02.qcow2-fqcow2vm.snap2, mount the snapshot file to a directory

#qemu-nbd --connect=/dev/nbd0vm.snap

#mount/dev/nbd0p1loop/

#cdloop/

3. Download the software to be deployed via ftp and copy it to the mounting directory

If tomcat is deployed, then

#wgetftp://ftp.muug.mb.ca/mirror/centos/7.1.1503/updates/x86_64/Packages/tomcat-7.0.54-2.el7_1.noarch.rpm#cptomcat-7.0.54-2.el7_1 .noarch.rpmloop/

4. Switch to the mount directory and execute the chroot command to use the mount directory as the root directory;

#chroot./

5. Execute the application software deployment configuration script to complete the deployment;

#rpm-ivhtomcat-7.0.54-2.el7_1.noarch.rpm

6. Execute the command to exit the snapshot mounting directory;

#exit; cd ..; umount ./loop; qemu-nbd-d /dev/nbd0

7. If the user creates multiple virtual machines of the same application, then copy the snapshot file multiple times;

#cpvm.snapvm.snap1

8. Start the virtual machine, and the virtual machine deployment application is completed.

#virshcreatelibvirt.xml.

Claims (7)

1. A method for safe and efficient virtual machine software deployment, characterized in that: the method comprises the steps of: Step 1: First copy a mirror image and take a snapshot of the mirror image; Step 2: Mount the snapshot file to a directory; Step 3: Download the software to be deployed via ftp and copy it to the mount directory; Step 4: Switch to the mount directory and execute the chroot command to use the mount directory as the root directory; Step 5: Execute the application software deployment configuration script to complete the deployment; Step 6: Execute the command to exit the snapshot mounting directory; Step 7: If the user creates multiple virtual machines of the same application, then copy the snapshot files multiple times; Step 8: Start the virtual machine, and the virtual machine deployment application is completed. 2. A method for deploying safe and efficient virtual machine software according to claim 1, characterized in that: the mirror image is a virtual machine system mirror image, and the root format of the mirror image file is qcow2; the snapshot adopts an external snapshot mode, which will Generate an additional qcow2 file; Mounting the snapshot file to a directory means using the mount command to mount the snapshot file to a certain directory in a readable and writable manner. 3. A safe and efficient virtual machine software deployment method according to claim 1, characterized in that: the software to be deployed by the virtual machine is usually placed on the ftp server, and the script files for how to deploy and configure are also placed on the ftp server. 4. A safe and efficient virtual machine software deployment method according to claim 2, characterized in that: the software to be deployed by the virtual machine is usually placed on the ftp server, and the script files for how to deploy and configure are also placed on the ftp server. 5. A method for deploying safe and efficient virtual machine software according to any one of claims 1 to 4, characterized in that: the chroot command is executed in the background of the cloud platform, and the chroot command is to switch the mount directory to The root directory is equivalent to switching to the mirror system. 6. A safe and efficient virtual machine software deployment method according to any one of claims 1 to 4, characterized in that: the execution of the application software deployment configuration script is a collection of scripts executed after switching to the mirroring system . 7. A method for safe and efficient virtual machine software deployment according to claim 5, characterized in that: said execution of application software deployment configuration scripts is a collection of scripts executed after switching to the mirroring system.