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Chapter 4. Installing the Migration Toolkit for Containers
You can install the Migration Toolkit for Containers (MTC) on OpenShift Container Platform 3 and on OpenShift Container Platform 4.5 clusters.
You must install the same MTC version on all clusters.
By default, the MTC web console and the Migration Controller pod run on the target cluster. You can configure the Migration Controller custom resource manifest to run the MTC web console and the Migration Controller pod on a source cluster or on a remote cluster.
After you have installed MTC, you must configure an object storage to use as a replication repository.
You can install the MTC Operator on OpenShift Container Platform 4 by using the OpenShift Container Platform web console.
Prerequisites
-
You must be logged in as a user with
cluster-adminprivileges on all clusters.
Procedure
-
In the OpenShift Container Platform web console, click Operators
OperatorHub. - Use the Filter by keyword field to find the Migration Toolkit for Containers Operator.
Select the Migration Toolkit for Containers Operator and click Install.
NoteDo not change the subscription approval option to Automatic. The Migration Toolkit for Containers version must be the same on the source and the target clusters.
Click Install.
On the Installed Operators page, the Migration Toolkit for Containers Operator appears in the openshift-migration project with the status Succeeded.
- Click Migration Toolkit for Containers Operator.
- Under Provided APIs, locate the Migration Controller tile, and click Create Instance.
If you do not want to run the MTC web console and the
Migration Controllerpod on the cluster, update the following parameters in themigration-controllercustom resource manifest:spec: ... migration_controller: false migration_ui: false ... deprecated_cors_configuration: true1 - 1
- This parameter is required only for OpenShift Container Platform 4.1.
- Click Create.
-
Click Workloads
Pods to verify that the MTC pods are running.
You can install the Migration Toolkit for Containers Operator manually on OpenShift Container Platform 3.7, 3.9, 3.10, or 3.11.
You must install the same MTC version on the OpenShift Container Platform 3 and 4 clusters.
To ensure that you have the latest version on the OpenShift Container Platform 3 cluster, download the operator.yml and controller-3.yml files when you are ready to create and run the migration plan.
Prerequisites
-
You must be logged in as a user with
cluster-adminprivileges on all clusters. -
You must have access to
registry.redhat.io. -
You must have
podmaninstalled. - The cluster on which you are installing MTC must be OpenShift Container Platform 3.7, 3.9, 3.10, or 3.11.
- You must create an image stream secret and copy it to each node in the cluster.
Procedure
Log in to
registry.redhat.iowith your Red Hat Customer Portal credentials:$ sudo podman login registry.redhat.ioDownload the
operator.ymlfile:$ sudo podman cp $(sudo podman create \ registry.redhat.io/rhmtc/openshift-migration-rhel7-operator:v1.4):/operator.yml ./Download the
controller-3.ymlfile:$ sudo podman cp $(sudo podman create \ registry.redhat.io/rhmtc/openshift-migration-rhel7-operator:v1.4):/controller-3.yml ./- Log in to your OpenShift Container Platform 3 cluster.
Verify that the cluster can authenticate with
registry.redhat.io:$ oc run test --image registry.redhat.io/ubi8 --command sleep infinityCreate the Migration Toolkit for Containers Operator object:
$ oc create -f operator.ymlExample output
namespace/openshift-migration created rolebinding.rbac.authorization.k8s.io/system:deployers created serviceaccount/migration-operator created customresourcedefinition.apiextensions.k8s.io/migrationcontrollers.migration.openshift.io created role.rbac.authorization.k8s.io/migration-operator created rolebinding.rbac.authorization.k8s.io/migration-operator created clusterrolebinding.rbac.authorization.k8s.io/migration-operator created deployment.apps/migration-operator created Error from server (AlreadyExists): error when creating "./operator.yml": rolebindings.rbac.authorization.k8s.io "system:image-builders" already exists1 Error from server (AlreadyExists): error when creating "./operator.yml": rolebindings.rbac.authorization.k8s.io "system:image-pullers" already exists- 1
- You can ignore
Error from server (AlreadyExists)messages. They are caused by the Migration Toolkit for Containers Operator creating resources for earlier versions of OpenShift Container Platform 3 that are provided in later releases.
Create the
MigrationControllerobject:$ oc create -f controller-3.ymlVerify that the MTC pods are running:
$ oc get pods -n openshift-migration
4.3. Configuring a replication repository 复制链接链接已复制到粘贴板!
You must configure an object storage to use as a replication repository. The Migration Toolkit for Containers (MTC) copies data from the source cluster to the replication repository, and then from the replication repository to the target cluster.
MTC supports the file system and snapshot data copy methods for migrating data from the source cluster to the target cluster. You can select a method that is suited for your environment and is supported by your storage provider.
All clusters must have uninterrupted network access to the replication repository.
If you use a proxy server with an internally hosted replication repository, you must ensure that the proxy allows access to the replication repository.
The following storage providers are supported:
- Multi-Cloud Object Gateway (MCG)
- Amazon Web Services (AWS) S3
- Google Cloud Platform (GCP)
- Microsoft Azure Blob
- Generic S3 object storage, for example, Minio or Ceph S3
Additional resources
4.3.1. Configuring Multi-Cloud Object Gateway 复制链接链接已复制到粘贴板!
You can install the OpenShift Container Storage Operator and configure a Multi-Cloud Object Gateway (MCG) storage bucket as a replication repository for the Migration Toolkit for Containers (MTC).
You can install the OpenShift Container Storage Operator from OperatorHub.
Procedure
-
In the OpenShift Container Platform web console, click Operators
OperatorHub. - Use Filter by keyword (in this case, OCS) to find the OpenShift Container Storage Operator.
- Select the OpenShift Container Storage Operator and click Install.
- Select an Update Channel, Installation Mode, and Approval Strategy.
Click Install.
On the Installed Operators page, the OpenShift Container Storage Operator appears in the openshift-storage project with the status Succeeded.
You can create the Multi-Cloud Object Gateway (MCG) storage bucket’s custom resources (CRs).
Procedure
Log in to the OpenShift Container Platform cluster:
$ oc loginCreate the
NooBaaCR configuration file,noobaa.yml, with the following content:apiVersion: noobaa.io/v1alpha1 kind: NooBaa metadata: name: <noobaa> namespace: openshift-storage spec: dbResources: requests: cpu: 0.51 memory: 1Gi coreResources: requests: cpu: 0.52 memory: 1GiCreate the
NooBaaobject:$ oc create -f noobaa.ymlCreate the
BackingStoreCR configuration file,bs.yml, with the following content:apiVersion: noobaa.io/v1alpha1 kind: BackingStore metadata: finalizers: - noobaa.io/finalizer labels: app: noobaa name: <mcg_backing_store> namespace: openshift-storage spec: pvPool: numVolumes: 31 resources: requests: storage: <volume_size>2 storageClass: <storage_class>3 type: pv-poolCreate the
BackingStoreobject:$ oc create -f bs.ymlCreate the
BucketClassCR configuration file,bc.yml, with the following content:apiVersion: noobaa.io/v1alpha1 kind: BucketClass metadata: labels: app: noobaa name: <mcg_bucket_class> namespace: openshift-storage spec: placementPolicy: tiers: - backingStores: - <mcg_backing_store> placement: SpreadCreate the
BucketClassobject:$ oc create -f bc.ymlCreate the
ObjectBucketClaimCR configuration file,obc.yml, with the following content:apiVersion: objectbucket.io/v1alpha1 kind: ObjectBucketClaim metadata: name: <bucket> namespace: openshift-storage spec: bucketName: <bucket>1 storageClassName: <storage_class> additionalConfig: bucketclass: <mcg_bucket_class>- 1
- Record the bucket name for adding the replication repository to the MTC web console.
Create the
ObjectBucketClaimobject:$ oc create -f obc.ymlWatch the resource creation process to verify that the
ObjectBucketClaimstatus isBound:$ watch -n 30 'oc get -n openshift-storage objectbucketclaim migstorage -o yaml'This process can take five to ten minutes.
Obtain and record the following values, which are required when you add the replication repository to the MTC web console:
S3 endpoint:
$ oc get route -n openshift-storage s3S3 provider access key:
$ oc get secret -n openshift-storage migstorage \ -o go-template='{{ .data.AWS_ACCESS_KEY_ID }}' | base64 --decodeS3 provider secret access key:
$ oc get secret -n openshift-storage migstorage \ -o go-template='{{ .data.AWS_SECRET_ACCESS_KEY }}' | base64 --decode
4.3.2. Configuring Amazon Web Services S3 复制链接链接已复制到粘贴板!
You can configure an Amazon Web Services (AWS) S3 storage bucket as a replication repository for the Migration Toolkit for Containers (MTC).
Prerequisites
- The AWS S3 storage bucket must be accessible to the source and target clusters.
- You must have the AWS CLI installed.
If you are using the snapshot copy method:
- You must have access to EC2 Elastic Block Storage (EBS).
- The source and target clusters must be in the same region.
- The source and target clusters must have the same storage class.
- The storage class must be compatible with snapshots.
Procedure
Create an AWS S3 bucket:
$ aws s3api create-bucket \ --bucket <bucket> \1 --region <bucket_region>2 Create the IAM user
velero:$ aws iam create-user --user-name veleroCreate an EC2 EBS snapshot policy:
$ cat > velero-ec2-snapshot-policy.json <<EOF { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "ec2:DescribeVolumes", "ec2:DescribeSnapshots", "ec2:CreateTags", "ec2:CreateVolume", "ec2:CreateSnapshot", "ec2:DeleteSnapshot" ], "Resource": "*" } ] } EOFCreate an AWS S3 access policy for one or for all S3 buckets:
$ cat > velero-s3-policy.json <<EOF { "Version": "2012-10-17", "Statement": [ { "Effect": "Allow", "Action": [ "s3:GetObject", "s3:DeleteObject", "s3:PutObject", "s3:AbortMultipartUpload", "s3:ListMultipartUploadParts" ], "Resource": [ "arn:aws:s3:::<bucket>/*"1 ] }, { "Effect": "Allow", "Action": [ "s3:ListBucket", "s3:GetBucketLocation", "s3:ListBucketMultipartUploads" ], "Resource": [ "arn:aws:s3:::<bucket>"2 ] } ] } EOFExample output
"Resource": [ "arn:aws:s3:::*"Attach the EC2 EBS policy to
velero:$ aws iam put-user-policy \ --user-name velero \ --policy-name velero-ebs \ --policy-document file://velero-ec2-snapshot-policy.jsonAttach the AWS S3 policy to
velero:$ aws iam put-user-policy \ --user-name velero \ --policy-name velero-s3 \ --policy-document file://velero-s3-policy.jsonCreate an access key for
velero:$ aws iam create-access-key --user-name velero { "AccessKey": { "UserName": "velero", "Status": "Active", "CreateDate": "2017-07-31T22:24:41.576Z", "SecretAccessKey": <AWS_SECRET_ACCESS_KEY>,1 "AccessKeyId": <AWS_ACCESS_KEY_ID>2 } }
4.3.3. Configuring Google Cloud Platform 复制链接链接已复制到粘贴板!
You can configure a Google Cloud Platform (GCP) storage bucket as a replication repository for the Migration Toolkit for Containers (MTC).
Prerequisites
- The GCP storage bucket must be accessible to the source and target clusters.
-
You must have
gsutilinstalled. If you are using the snapshot copy method:
- The source and target clusters must be in the same region.
- The source and target clusters must have the same storage class.
- The storage class must be compatible with snapshots.
Procedure
Log in to
gsutil:$ gsutil initExample output
Welcome! This command will take you through the configuration of gcloud. Your current configuration has been set to: [default] To continue, you must login. Would you like to login (Y/n)?Set the
BUCKETvariable:$ BUCKET=<bucket>1 - 1
- Specify your bucket name.
Create a storage bucket:
$ gsutil mb gs://$BUCKET/Set the
PROJECT_IDvariable to your active project:$ PROJECT_ID=`gcloud config get-value project`Create a
veleroIAM service account:$ gcloud iam service-accounts create velero \ --display-name "Velero Storage"Create the
SERVICE_ACCOUNT_EMAILvariable:$ SERVICE_ACCOUNT_EMAIL=`gcloud iam service-accounts list \ --filter="displayName:Velero Storage" \ --format 'value(email)'`Create the
ROLE_PERMISSIONSvariable:$ ROLE_PERMISSIONS=( compute.disks.get compute.disks.create compute.disks.createSnapshot compute.snapshots.get compute.snapshots.create compute.snapshots.useReadOnly compute.snapshots.delete compute.zones.get )Create the
velero.servercustom role:$ gcloud iam roles create velero.server \ --project $PROJECT_ID \ --title "Velero Server" \ --permissions "$(IFS=","; echo "${ROLE_PERMISSIONS[*]}")"Add IAM policy binding to the project:
$ gcloud projects add-iam-policy-binding $PROJECT_ID \ --member serviceAccount:$SERVICE_ACCOUNT_EMAIL \ --role projects/$PROJECT_ID/roles/velero.serverUpdate the IAM service account:
$ gsutil iam ch serviceAccount:$SERVICE_ACCOUNT_EMAIL:objectAdmin gs://${BUCKET}Save the IAM service account keys to the
credentials-velerofile in the current directory:$ gcloud iam service-accounts keys create credentials-velero \ --iam-account $SERVICE_ACCOUNT_EMAIL
4.3.4. Configuring Microsoft Azure Blob 复制链接链接已复制到粘贴板!
You can configure a Microsoft Azure Blob storage container as a replication repository for the Migration Toolkit for Containers (MTC).
Prerequisites
- You must have an Azure storage account.
- You must have the Azure CLI installed.
- The Azure Blob storage container must be accessible to the source and target clusters.
If you are using the snapshot copy method:
- The source and target clusters must be in the same region.
- The source and target clusters must have the same storage class.
- The storage class must be compatible with snapshots.
Procedure
Set the
AZURE_RESOURCE_GROUPvariable:$ AZURE_RESOURCE_GROUP=Velero_BackupsCreate an Azure resource group:
$ az group create -n $AZURE_RESOURCE_GROUP --location <CentralUS>1 - 1
- Specify your location.
Set the
AZURE_STORAGE_ACCOUNT_IDvariable:$ AZURE_STORAGE_ACCOUNT_ID=velerobackupsCreate an Azure storage account:
$ az storage account create \ --name $AZURE_STORAGE_ACCOUNT_ID \ --resource-group $AZURE_RESOURCE_GROUP \ --sku Standard_GRS \ --encryption-services blob \ --https-only true \ --kind BlobStorage \ --access-tier HotSet the
BLOB_CONTAINERvariable:$ BLOB_CONTAINER=veleroCreate an Azure Blob storage container:
$ az storage container create \ -n $BLOB_CONTAINER \ --public-access off \ --account-name $AZURE_STORAGE_ACCOUNT_IDCreate a service principal and credentials for
velero:$ AZURE_SUBSCRIPTION_ID=`az account list --query '[?isDefault].id' -o tsv` \ AZURE_TENANT_ID=`az account list --query '[?isDefault].tenantId' -o tsv` \ AZURE_CLIENT_SECRET=`az ad sp create-for-rbac --name "velero" --role "Contributor" --query 'password' -o tsv` \ AZURE_CLIENT_ID=`az ad sp list --display-name "velero" --query '[0].appId' -o tsv`Save the service principal credentials in the
credentials-velerofile:$ cat << EOF > ./credentials-velero AZURE_SUBSCRIPTION_ID=${AZURE_SUBSCRIPTION_ID} AZURE_TENANT_ID=${AZURE_TENANT_ID} AZURE_CLIENT_ID=${AZURE_CLIENT_ID} AZURE_CLIENT_SECRET=${AZURE_CLIENT_SECRET} AZURE_RESOURCE_GROUP=${AZURE_RESOURCE_GROUP} AZURE_CLOUD_NAME=AzurePublicCloud EOF