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4.4.2 resize the CVM

4.4.3 adjust several other CVMs as well

4.4.4 in addition, you can not only adjust the size of the bow, but also have a return arrow, and you can also adjust it to a smaller size.

V. Summary

In fact, the modification of the configuration type of OpenStack CVM is equivalent to the migration of a CVM to different hosts, so password-free access is required in the relevant migrated CVM. Since OpenStack is managed by the Nova component, password-free access is required for Nova users.

However, the migration between CVMs can be done through the qemu+tcp of virsh, without the need to configure the mutual trust of nova.

Dynamic hot migration of kilo openstack CVM

VI. Pay attention

1. In the process of migrating or resizing the CVM, the virtual machine will have downtime, and the running service will also down down, so it is best to shut down the running service in advance.

2. Nova should not only be password-free, but also must not need verification. In the case of a small number of nodes, it is best to ssh each other manually.

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