Add clone vm example
Add clone vm example into mistral-extra Co-Authored-By: Lingxian Kong <anlin.kong@gmail.com> Change-Id: Ibe8558cafb334a25db2455157f22170b725a08d3
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=======================
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Cloning virtual machine
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=======================
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Workflow ``clone_vm`` defines the process of creating a new VM based on
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existing VM which was created using bootable volume (and may have other
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additional volumes). It's also a good example of using sub-workflows in one
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workflow.
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To run the example:
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1. Create sub-workflows ``clone_volume.yaml`` and
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``boot_vm_from_volume.yaml``::
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mistral workflow-create clone_volume.yaml
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mistral workflow-create boot_vm_from_volume.yaml
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2. Create workflow ``clone_vm.yaml``::
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mistral workflow-create clone_vm.yaml
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3. Create ``input.json`` file containing workflow input parameters as follows::
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{
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"vm_name": "new_vm",
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"flavor_ref": "1",
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"source_root_vol_id": "1969299a-4c45-4900-bfe0-5ac65c1f2211",
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"root_vol_name": "new_root_vol",
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"root_vol_size": 1,
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"additional_volumes": [
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{
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"vol_name": "new_user_vol_1",
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"vol_size": 1,
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"source_vol_id": "94391f69-a2f7-4406-b602-86e0b421d519"
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},
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{
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"vol_name": "new_user_vol_2",
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"vol_size": 1,
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"source_vol_id": "262b37ab-86f1-4be5-ada2-645898400584"
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}
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]
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}
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5. Start workflow::
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mistral execution-create clone_vm input.json
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6. Get execution status by using execution id from the previous command
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output::
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mistral execution-get <execution_id>
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7. Make sure that a virtual machine with a bootable volume and two additional
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volumes has been created successfully. It can be done by opening Horizon UI
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or using Nova client (python-novaclient).
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---
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version: '2.0'
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boot_vm_from_volume:
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description: Create a virtual machine from a bootable volume
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type: direct
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input:
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- vm_name
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- block_device_mapping_v2
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- flavor_ref
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- image
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output:
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vm_id: <% $.vm_id %>
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tasks:
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create_server:
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action: nova.servers_create
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input:
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name: <% $.vm_name %>
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block_device_mapping_v2: <% $.block_device_mapping_v2 %>
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flavor: <% $.flavor_ref %>
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image: <% $.image %>
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publish:
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vm_id: <% task(create_server).result.id %>
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on-success:
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- wait_for_instance
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wait_for_instance:
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action: nova.servers_find id=<% $.vm_id %> status='ACTIVE'
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retry:
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delay: 10
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count: 5
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---
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version: 2.0
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clone_vm:
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type: direct
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description: Create a virtual machine by cloning an existing one. 1.clone system volume 2.set the system volume to bootable 3.create a new instance from the new bootable system volume 4.clone user volumes 5.attach user volumes to the new instance
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input:
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- vm_name #name of the new instance
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- flavor_ref #flavor of the new instance
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- source_root_vol_id #root volume id of the source instance
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- root_vol_name #root volume name of the new instance
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- root_vol_size #root volume size of the new instance
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- additional_volumes:
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- vol_name #volume name of the new instance
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- vol_size #volume size of the new instance
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- source_vol_id #source volume id of the source instance
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tasks:
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clone_root_volume:
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description: Create a new volume from root volume of source vm.
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workflow: clone_volume
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input:
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size: <% $.root_vol_size %>
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source_volid: <% $.source_root_vol_id %>
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name: <% $.root_vol_name %>
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publish:
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new_root_vol_id: <% task(clone_root_volume).result.vol_id %>
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on-success:
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- set_volume_bootable
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set_volume_bootable:
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action: cinder.volumes_set_bootable volume=<% $.new_root_vol_id %> flag=true
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on-success:
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- create_new_vm
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create_new_vm:
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description: Boot a new instance from new bootable volume
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workflow: boot_vm_from_volume
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input:
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image: ""
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vm_name: <% $.vm_name %>
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flavor_ref: <% $.flavor_ref %>
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block_device_mapping_v2:
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- source_type: "volume"
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destination_type: "volume"
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delete_on_termination: "FALSE"
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boot_index: "0"
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uuid: <% $.new_root_vol_id %>
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publish:
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new_vm_id: <% task(create_new_vm).result.vm_id %>
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on-success:
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- clone_additional_volumes
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clone_additional_volumes:
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description: Create new volumes from existed ones one by one
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with-items: volume in <% $.additional_volumes %>
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workflow: clone_volume
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input:
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source_volid: <% ($.volume).source_vol_id %>
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size: <% ($.volume).vol_size %>
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name: <% ($.volume).vol_name %>
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publish:
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additional_vol_ids: <% task(clone_additional_volumes).result.vol_id %>
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on-success:
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- attach_volume
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attach_volume:
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description: Attach additional volumes to the instance
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with-items: vol_id in <% $.additional_vol_ids %>
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action: nova.volumes_create_server_volume
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input:
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server_id: <% $.new_vm_id %>
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volume_id: <% $.vol_id %>
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device: null
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---
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version: '2.0'
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clone_volume:
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description: Create a new volume by cloning an existing one
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type: direct
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input:
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- source_volid # ID of the source volume
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- name # name of the new volume
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- size # size of the new volume
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output:
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vol_id: <% $.vol_id %>
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tasks:
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create_volume:
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action: cinder.volumes_create
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input:
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name: <% $.name %>
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size: <% $.size %>
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source_volid: <% $.source_volid %>
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publish:
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vol_id: <% task(create_volume).result.id %>
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on-success:
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- wait_for_volume
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wait_for_volume:
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action: cinder.volumes_find id=<% $.vol_id %> status='available'
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retry:
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delay: 5
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count: 15
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{
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"vm_name":"new_vm",
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"flavor_ref":"1",
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"source_root_vol_id":"1969299a-4c45-4900-bfe0-5ac65c1f2211",
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"root_vol_name":"new_sys_vol",
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"root_vol_size":1,
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"additional_volumes":
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[{
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"vol_size":1,
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"source_vol_id":"94391f69-a2f7-4406-b602-86e0b421d519",
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"vol_name":"new_user_vol_1"
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},
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{
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"vol_size":1,
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"source_vol_id":"262b37ab-86f1-4be5-ada2-645898400584",
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"vol_name":"new_user_vol_2"
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}]
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}
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