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CORS (Cross-Origin Resource Sharing) Configuration

These steps are only required if you are using a Konveyor version older than 1.1.1 OR are installing the controller/UI on OpenShift 3.

OpenShift 4

If installing the controller/UI on a 4.x cluster using a version older than Konveyor 1.1.1 CORS will be configured on the cluster automatically.

If you are installing a controller older than 1.1.1 on OpenShift 4.1 you will need to add this to the MigrationController CR spec section: deprecated_cors_configuration: true

Manual CORS Configuration

Openshift 3

OpenShift 3 CORS configuration needs to be done manually.

In order to enable the UI to talk to an Openshift 3 cluster (whether local or remote) it is necessary to edit the master-config.yaml and restart the Openshift master nodes.

To determine the CORS URL that needs to be added retrieve the route URL after installing the controller, run the following command (NOTE: This must be run on the cluster that is serving your web UI):
oc get -n openshift-migration route/migration -o go-template='(?i)//{{ .spec.host }}(:|\z){{ println }}' | sed 's,\.,\\.,g'

Output from this command will look something like this, but will be different for every cluster:
(?i}//migration-openshift-migration\.apps\.foo\.bar\.baz\.com(:|\z)

Add the output to /etc/origin/master/master-config.yaml under corsAllowedOrigins, for instance:

corsAllowedOrigins:
- (?i}//migration-openshift-migration\.apps\.foo\.bar\.baz\.com(:|\z)

After making these changes on 3.x you'll need to restart OpenShift components to pick up the changed config values. The process for restarting 3.x control plane components differs based on the OpenShift version.

# In OpenShift 3.7-3.9, the control plane runs within systemd services
$ systemctl restart atomic-openshift-master-api
$ systemctl restart atomic-openshift-master-controllers


# In OpenShift 3.10-3.11, the control plane runs in 'Static Pods'
$ /usr/local/bin/master-restart api
$ /usr/local/bin/master-restart controllers

Openshift 4.3+

On Openshift 4 cluster resources are modified by the operator if the controller is installed there and you can skip these steps. If you chose not to install the controller on your Openshift 4 cluster you will need to perform these steps manually.

If you haven't already, determine the CORS URL that needs to be added retrieve the route URL:
oc get -n openshift-migration route/migration -o go-template='(?i)//{{ .spec.host }}(:|\z){{ println }}' | sed 's,\.,\\.,g'

Output from this command will look something like this, but will be different for every cluster:
(?i)//migration-openshift-migration\.apps\.foo\.bar\.baz\.com(:|\z)

Openshift 4.2

On Openshift 4 cluster resources are modified by the operator if the controller is installed there and you can skip these steps. If you chose not to install the controller on your Openshift 4 cluster you will need to perform these steps manually.

oc edit apiserver cluster and ensure the following exist:

spec:
  additionalCORSAllowedOrigins:
  - (?i)//migration-openshift-migration\.apps\.foo\.bar\.baz\.com(:|\z)

OpenShift 4.1

On Openshift 4 cluster resources are modified by the operator if the controller is installed there and you can skip these steps. If you chose not to install the controller on your Openshift 4 cluster you will need to perform these steps manually.

oc edit authentication.operator cluster and ensure the following exist:

spec:
  unsupportedConfigOverrides:
    corsAllowedOrigins:
    - //localhost(:|$)
    - //127.0.0.1(:|$)
    - (?i)//migration-openshift-migration\.apps\.foo\.bar\.baz\.com(:|\z)

oc edit kubeapiserver.operator cluster and ensure the following exist:

spec:
  unsupportedConfigOverrides:
    corsAllowedOrigins:
    - (?i)//migration-openshift-migration\.apps\.foo\.bar\.baz\.com(:|\z)