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vm-import-controller

vm-import-controller is an addon to help migrate VM workloads from other source clusters to an existing Harvester cluster.

Currently the following source providers will be supported:

  • vmware
  • openstack

API

The vm-import-controller introduces two CRD's

Sources

sources allows users to define valid source clusters.

For example:

apiVersion: migration.harvesterhci.io/v1beta1
kind: VmwareSource
metadata:
  name: vcsim
  namespace: default
spec:
  endpoint: "https://vscim/sdk"
  dc: "DCO"
  credentials:
    name: vsphere-credentials
    namespace: default

The secret contains the credentials for the vcenter endpoint:

apiVersion: v1
kind: Secret
metadata: 
  name: vsphere-credentials
  namespace: default
stringData:
  "username": "user"
  "password": "password"

As part of the reconcile process, the controller will login to the vcenter and verify the dc specified in the source spec is valid.

Once this check is passed, the source is marked ready, and can be used for vm migrations

$ kubectl get vmwaresource.migration 
NAME      STATUS
vcsim   clusterReady

For openstack based source clusters a sample definition is as follows:

apiVersion: migration.harvesterhci.io/v1beta1
kind: OpenstackSource
metadata:
  name: devstack
  namespace: default
spec:
  endpoint: "https://devstack/identity"
  region: "RegionOne"
  credentials:
    name: devstack-credentials
    namespace: default

The secret contains the credentials for the vcenter endpoint:

apiVersion: v1
kind: Secret
metadata: 
  name: devstack-credentials
  namespace: default
stringData:
  "username": "user"
  "password": "password"
  "project_name": "admin"
  "domain_name": "default"
  "ca_cert": "pem-encoded-ca-cert"

Openstack source reconcile process, attempts to list VM's in the project, and marks the source as ready

$ kubectl get openstacksource.migration
NAME       STATUS
devstack   clusterReady

VirtualMachimeImport

The VirtualMachineImport crd provides a way for users to define the source VM and mapping to the actual source cluster to perform the VM export-import from.

A sample VirtualMachineImport looks as follows:

apiVersion: migration.harvesterhci.io/v1beta1
kind: VirtualMachineImport
metadata:
  name: alpine-export-test
  namespace: default
spec: 
  virtualMachineName: "alpine-export-test"
  networkMapping:
  - sourceNetwork: "dvSwitch 1"
    destinationNetwork: "default/vlan1"
  - sourceNetwork: "dvSwitch 2"
    destinationNetwork: "default/vlan2"
  sourceCluster: 
    name: vcsim
    namespace: default
    kind: VmwareSource
    apiVersion: migration.harvesterhci.io/v1beta1

This will trigger the controller to export the VM named "alpine-export-test" on the vmware source vcsim to be exported, processed and recreated into the harvester cluster

This can take a while based on the size of the virtual machine, but users should see VirtualMachineImages created for each disk in the defined virtual machine.

The list of items in networkMapping will define how the source network interfaces are mapped into the Harvester Networks.

If a match is not found, then each unmatched network inteface is attached to the default managementNetwork

Once the virtual machine has been imported successfully the object will reflect the status

$ kubectl get virtualmachineimport.migration
NAME                    STATUS
alpine-export-test      virtualMachineRunning
openstack-cirros-test   virtualMachineRunning

Similarly, users can define a VirtualMachineImport for Openstack source as well:

apiVersion: migration.harvesterhci.io/v1beta1
kind: VirtualMachineImport
metadata:
  name: openstack-demo
  namespace: default
spec: 
  virtualMachineName: "openstack-demo" #Name or UUID for instance
  networkMapping:
  - sourceNetwork: "shared"
    destinationNetwork: "default/vlan1"
  - sourceNetwork: "public"
    destinationNetwork: "default/vlan2"
  sourceCluster: 
    name: devstack
    namespace: default
    kind: OpenstackSource
    apiVersion: migration.harvesterhci.io/v1beta1

NOTE: Openstack allows users to have multiple instances with the same name. In such a scenario the users are advised to use the Instance ID. The reconcile logic tries to perform a lookup from name to ID when a name is used.

Testing

Currently basic integration tests are available under tests/integration

However a lot of these tests need access to a working Harvester, Openstack and Vmware cluster.

The integration tests can be setup by using the following environment variables to point the tests to a working environment to perform the actual vm migration tests

export GOVC_PASSWORD="vsphere-password"
export GOVC_USERNAME="vsphere-username"
export GOVC_URL="https://vcenter/sdk"
export GOVC_DATACENTER="vsphere-datacenter"
#The controller exposes the converted disks via a http endpoint and leverages the download capability of longhorn backing images
# the SVC address needs to be the address of node where integration tests are running and should be reachable from harvester cluster
export SVC_ADDRESS="address for node" 
export VM_NAME="vmware-export-test-vm-name"
export USE_EXISTING_CLUSTER=true
export OS_AUTH_URL="openstack/identity" #Keystone endpoint
export OS_PROJECT_NAME="openstack-project-name"
export OS_USER_DOMAIN_NAME="openstack-user-domain"
export OS_USERNAME="openstack-username"
export OS_PASSWORD="openstack-password"
export OS_VM_NAME="openstack-export-test-vm-name"
export OS_REGION_NAME="openstack-region"
export KUBECONFIG="kubeconfig-for-harvester-cluster"