Kilo - nova live resize

时间 2020-01-15

标签 kilo nova live resize 繁體版

原文原文链接

环境git

版本： rdo OpenStack Kilo
github

qemu： 2.3.0api

libvirt: 1.2.17-13bash

背景ide

想复用nova resize那套逻辑，resize用的仍是cold_migrate那套逻辑，走conductor api.spa

实现思路3d

一、镜像须要qemu-guest-agent支持，在镜像中安装qemu-guest-agent包，并设置开机自启动，而后镜像设置元数据，这两种方式设置均可以：orm

glance p_w_picpath-update <p_w_picpath-id> --property hw_qemu_guest_agent=yes
nova p_w_picpath-meta {p_w_picpath_id} set hw_qemu_guest_agent=yes

二、沿用本来resize的逻辑，因此live-resize也是以flavor来的，并且仍是设置元数据（hw:max_vcpus、hw:max_memory、hw:max_memory_slots）接口

hw:max_memory_slots：是内存插槽数内存

举例以下：

[root@controller01 ~(keystone_admin)]$ nova flavor-show 29797db8-0f32-4c2f-b5ee-4b4657be5277

+----------------------------+--------------------------------------+

| Property | Value |

+----------------------------+--------------------------------------+

| OS-FLV-DISABLED:disabled | False |

| OS-FLV-EXT-DATA:ephemeral | 0 |

| disk | 14 |

| extra_specs | {"hw:max_vcpus": "4"} |

| id | 29797db8-0f32-4c2f-b5ee-4b4657be5277 |

| name | m1.small |

| os-flavor-access:is_public | True |

| ram | 1548 |

| rxtx_factor | 1.0 |

| swap | |

| vcpus | 1 |

+----------------------------+--------------------------------------+

[root@controller01 ~(keystone_admin)]$ nova flavor-show 7efa6a5e-9271-4820-a098-67f50bcb982a

+----------------------------+--------------------------------------+

| Property | Value |

+----------------------------+--------------------------------------+

| OS-FLV-DISABLED:disabled | False |

| OS-FLV-EXT-DATA:ephemeral | 0 |

| disk | 14 |

| extra_specs | {"hw:max_vcpus": "4"} |

| id | 7efa6a5e-9271-4820-a098-67f50bcb982a |

| name | m1.small.big |

| os-flavor-access:is_public | True |

| ram | 1548 |

| rxtx_factor | 1.0 |

| swap | |

| vcpus | 2 |

+----------------------------+--------------------------------------+

具体实现

模仿resize的接口，实现一遍live_resize逻辑。

patch地址（disk、内存还未作）：https://github.com/yaoice/nova/commit/175c5f003ddecdb87a45578bc06f3a1f9edc9727