RedHat 7 KVM Virtual machine Online migration between two host hosts

This article mainly uses two Redhat 7 KVM host and NFS shares to migrate virtual machines located in shared storage between the two host hosts online.

The original source of this article: Jiangjianrong Technical Blog http://jiangjianlong.blog.51cto.com/3735273/1793913

Environment Introduction:

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configuration process:

1, configure the NFS service on RH7-02, share the/share directory.

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2. Add the NFS shared directory to the storage pool for both hosts, and add a storage pool by clicking the + sign in the lower left corner, as an example of rh7-02 add storage pool

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3. The name of the input storage pool is share, select the type netfs:network exported Directory

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4, fill in the information of the storage pool, where target path path must be the same two host, format must choose NFS, and then enter the host name of NFS server, here directly fill in the IP address, Source path refers to the NFS server provides a shared directory

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5. Complete the Storage pool additions

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6. After the storage pool is created, the share subdirectory is automatically created in the target path path

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7. After the storage pool is created, the NFS shared directory is automatically mounted to the target Path

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8, create a new storage volume, click New Volume, enter the storage volume parameters, such as the name test-vm.img, format qcow2, size 8G storage volume

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9, complete the creation of the storage volume, the volume will be used as the hard disk of the virtual machine

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10, the storage volume created after the permissions are very low, can not be used by the virtual machine, need to change permissions, directly granted 777 permissions

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11. Create virtual machine, name TEST-VM, select Import existing disk image

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12. Import the storage volume we created above

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13. Select the CPU and memory configuration for the virtual machine

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14, complete the creation of virtual machine

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15. Adjust the virtual machine hardware, add New hardware, select the IDE CDROM under storage, and load the mirror to install the operating system

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16, under the IDE CDROM1 interface, click Connect, select a Redhat 7 installation image to connect

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17, under the Boot options interface, tick CDROM as the boot preferences for booting from the optical drive

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18, turn on the virtual machine power supply, install the operating system, after installing the operating system, remember to remove the boot options cdrom or downgrade the CDROM priority, to ensure that the hard disk boot

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19, another host rh7-01 configuration: As with rh7-02, configure the NFS storage pool.

20, Domain name resolution: In the two host/etc/hosts file, add each other's IP and host name for the hosts resolution

21. In rh7-02 virtual Machine Manager, connect 192.168.10.40 (i.e. rh7-01), then right-click on TEST-VM under localhost and select migrate

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22. In the Migration dialog box, select New host as 192.168.10.40 (i.e. rh7-01) and click Migrate to

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23, only a few seconds has been the virtual machine TEST-VM online migration to another host 192.168.10.40 (that is, rh7-01), and rh7-02 on the original TEST-VM is in the shutdown state, through the migration of the virtual machine before the long ping, packet loss 0~1 packets

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24. However, if you migrate the virtual machine TEST-VM from 192.168.10.40 (that is, rh7-01) back online to localhost (that is, rh7-02), you will lose twenty or thirty packets for reasons not yet known.

This article is from the "Jiangjianrong Technology blog" blog, make sure to keep this source http://jiangjianlong.blog.51cto.com/3735273/1793913

RedHat 7 KVM Virtual machine Online migration between two host hosts