Extract the data

To extract metadata and, optionally, binary image data from an MSR 2.9.x system, execute the following command on the source MSR 2.9.x system:

docker run \
--rm -it \
-v <local-migration-directory>:/migration:Z \
registry.mirantis.com/msr/mmt:<mmt-version> \
extract msr \
--source-mke-url <mke-url> \
--source-username <mke-admin-username> \
--source-password <mke-admin-password> \
--source-url <msr-2.9-url> \
--storage-mode <inplace|copy> \
--source-insecure-tls \
/migration

Note

Migrations that use the copy storage mode and a filesystem storage back end must also include the --mount option, to specify the MSR 2.9.x Docker volume that will be mounted to the MMT container at the /storage directory. As --mount is a Docker option, it must be included prior to the registry.mirantis.com/msr/mmt:<mmt-version> portion of the command.

--mount source=dtr-registry-<replica-id>,target=/storage

To obtain the MSR replica ID, run the following command from within an MSR node:

docker ps --format '{{.Names}}' -f name=dtr-rethink | cut -f 3 -d '-'

Command line parameters

Parameter	Description
source-mke-url	Set the URL for the source Mirantis Kubernetes Engine (MKE) system.
source-username	Set the username of the admin user for the MKE system running MSR 2.9.x.
source-password	Set the password of the admin user for the MKE system running MSR 2.9.x.
source-url	Set the URL for the source MSR 2.9.x system.
storage-mode	Set the registry migration storage mode. Valid values: inplace, copy
source-insecure-tls	Optional. Set whether to use an insecure connection. Valid values: true (skip certificate validation when communicating with the source system), false (perform certificate validation when communicating with the source system)
disable-analytics	Optional. Disables MMT metrics collection for the extract command. You must include the flag each time you run the command.

Example output:

The Mirantis Migration Tool extracted your registry of MSR 2.9, using the
following parameters:
Source Registry: https://172.17.0.1
Mode: copy
Image data: 2 blobs (2.8 MB)

Important

To avoid data inconsistencies, the source registry must remain in read-only mode throughout the migration to MSR 3.0.x.

The data extract is rendered as a TAR file with the name msr-backup-<MSR-version>-mmt.tar in the <local-migration-directory>.