Build a container image

Preview

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Using the migration artifacts, build a container image for the migrated app that you can then deploy to your target cluster. You can build the container image using build.sh or Skaffold.

Skaffold allows you to build and deploy in the same command, and is typically easier to use. To build using Skaffold, see Build and deploy multiple images using Skaffold.

To use build.sh to build the container:

1. Build the app container using the build script.

   chmod +x ./build.sh
   PROJECT_ID=PROJECT_ID TAG_NAME=TAG_NAME ./build.sh TARGET
   

   For TARGET, use openliberty or twas.

   On openliberty, if sensitive data is collected, liberty-secrets.yaml is generated. You need to apply the liberty-secrets.yaml prior to applying deployment_spec.yaml

   kubectl apply -f liberty-secrets.yaml
   

2. Optionally set the service type in deployment_spec.yaml.

   By default, Migrate to Containers sets the service type to ClusterIP, which makes the service available only to the pods in the deployment cluster.

   If you want to be able to access the service externally, set the service type to LoadBalancer, or to any other type required by your deployment. For example:

   apiVersion: v1
   kind: Service
   …
   spec:
     …
     type: LoadBalancer

You can now deploy the app container.

You can also use skaffold to build all applications:

1. Install skaffold

   # For Linux x86_64 (amd64)
   curl -Lo skaffold https://storage.googleapis.com/skaffold/releases/latest/skaffold-linux-amd64 && \
   sudo install skaffold /usr/local/bin/
   

2. Run skaffold build on the download artifacts and skaffold run. And then check that the containers have been deployed.

   skaffold build --build-concurrency=1 --profile cloudbuild --default-repo=eu.gcr.io/${PROJECT_ID} --file-output artifacts.json
   

   skaffold render  --namespace=default --build-artifacts=artifacts.json | tee full_deployment.yaml
   

What's next

Linux

Migrate

1. Add a migration source.
2. Create a migration plan.
3. Migrate data.
4. Customize your migration plan.
5. Execute the migration.
6. Monitor a migration.
7. Delete a migration.

Deploy

1. Review generated artifacts.
2. Configure logging.
3. Mounting external volumes.
4. Deploy a workload to a target cluster.
5. Deploy migrated VMs.
6. Post-migration image updates.
7. Monitor migrated workload.
8. Test your migrate app and validate the migration.

Windows

Migrate

1. Add a migration source.
2. Create a migration plan.
3. Customize your migration plan.
4. Execute the migration.
5. Monitor the migration.
6. Build a Windows container image.
7. Delete a migration.

Deploy

1. Deploy a workload to a target cluster.
2. Deploy migrated VMs.
3. Monitor migrated workload.
4. Test your migrate app and validate the migration.

Tomcat

Migrate

1. Add a migration source.
2. Create a migration.
3. Migrate data.
4. Customize your migration plan.
5. Execute the migration.
6. Monitor the migration.
7. Build a Tomcat container image.
8. Delete a migration.

Deploy

1. Deploy a workload to a target cluster.
2. Deploy migrated VMs.
3. Monitor migrated workload.
4. Test your migrate app and validate the migration.

WebSphere (Pre-Ga)

Migrate

1. Migration overview.
2. Requirements.
3. Before you begin.
4. Add a migration source.
5. Create a migration plan.
6. Migrate data.
7. Customize the migration plan.
8. Execute the migration.
9. Monitor the migration.
10. Build an app container image.
11. Deploy an app container to a target cluster.
12. Delete a migration.
13. Troubleshooting.

Deploy

1. Deploy a workload to a target cluster.
2. Deploy migrated VMs.
3. Monitor migrated workload.
4. Test your migrate app and validate the migration.