Offline Installation of Dell CSI Storage Providers

Offline Installation of Dell CSI Storage Providers

The csi-offline-bundle.sh script can be used to create a package usable for offline installation of the Dell CSI Storage Providers, via either Helm or the Dell CSM Operator.

This includes the following drivers:

As well as the Dell CSM Operator.

Dependencies

Multiple Linux-based systems may be required to create and process an offline bundle for use.

  • One Linux-based system, with Internet access, will be used to create the bundle. This involved the user cloning a git repository hosted on github.com and then invoking a script that utilizes docker or podman to pull and save container images to file.
  • One Linux-based system, with access to an image registry, to invoke a script that uses docker or podman to restore container images from file and push them to a registry

If one Linux system has both Internet access and access to an internal registry, that system can be used for both steps.

Preparing an offline bundle requires the following utilities:

Dependency Usage
docker or podman docker or podman will be used to pull images from public image registries, tag them, and push them to a private registry.
One of these will be required on both the system building the offline bundle as well as the system preparing for installation.
Tested version(s) are docker 19.03+ and podman 1.6.4+
git git will be used to manually clone one of the above repositories in order to create an offline bundle.
This is only needed on the system preparing the offline bundle.
Tested version(s) are git 1.8+ but any version should work.

Workflow

To perform an offline installation of a driver or the Operator, the following steps should be performed:

  1. Build an offline bundle
  2. Unpacking the offline bundle created in Step 1 and preparing for installation
  3. Perform either a Helm installation or Operator installation using the files obtained after unpacking in Step 2

NOTE: It is recommended to use the same build tool for packing and unpacking of images (either docker or podman).

Building an offline bundle

This needs to be performed on a Linux system with access to the Internet as a git repo will need to be cloned, and container images pulled from public registries.

To build an offline bundle, the following steps are needed:

  1. Perform a git clone of the desired repository. For a helm-based install, the specific driver repo should be cloned. For an Operator based deployment, the Dell CSM Operator repo should be cloned
  2. Run the csi-offline-bundle.sh script with an argument of -c in order to create an offline bundle
  • For Helm installs, the csi-offline-bundle.sh script will be found in the dell-csi-helm-installer directory
  • For Operator installs, the csm-offline-bundle.sh script will be found in the scripts directory

The script will perform the following steps:

  • Determine required images by parsing either the driver Helm charts (if run from a cloned CSI Driver git repository) or the Dell CSM Operator configuration files (if run from a clone of the Dell CSM Operator repository)
  • Perform an image pull of each image required
  • Save all required images to a file by running docker save or podman save
  • Build a tar.gz file containing the images as well as files required to installer the driver and/or Operator

The resulting offline bundle file can be copied to another machine, if necessary, to gain access to the desired image registry.

For example, here is the output of a request to build an offline bundle for the Dell CSM Operator:

git clone -b v1.5.1 https://github.com/dell/csm-operator.git

cd csm-operator

bash scripts/csm-offline-bundle.sh -c

*
* Building image manifest file

   Processing file /root/csm-operator/operatorconfig/driverconfig/common/default.yaml
   Processing file /root/csm-operator/bundle/manifests/dell-csm-operator.clusterserviceversion.yaml

*
* Pulling and saving container images

   dellemc/csi-isilon:v2.10.1
   dellemc/csi-metadata-retriever:v1.6.0
   dellemc/csipowermax-reverseproxy:v2.6.0
   dellemc/csi-powermax:v2.10.1
   dellemc/csi-powerstore:v2.10.1
   dellemc/csi-unity:v2.10.1
   dellemc/csi-vxflexos:v2.10.1
   dellemc/csm-authorization-sidecar:v1.10.0
   dellemc/csm-metrics-powerflex:v1.5.0
   dellemc/csm-metrics-powerscale:v1.2.0
   dellemc/csm-topology:v1.5.0
   dellemc/dell-csi-replicator:v1.8.0
   dellemc/dell-replication-controller:v1.8.0
   dellemc/sdc:4.5
   docker.io/dellemc/dell-csm-operator:v1.5.1
   gcr.io/kubebuilder/kube-rbac-proxy:v0.8.0
   nginxinc/nginx-unprivileged:1.20
   otel/opentelemetry-collector:0.42.0
   registry.k8s.io/sig-storage/csi-attacher:v4.3.0
   registry.k8s.io/sig-storage/csi-external-health-monitor-controller:v0.9.0
   registry.k8s.io/sig-storage/csi-node-driver-registrar:v2.8.0
   registry.k8s.io/sig-storage/csi-provisioner:v3.5.0
   registry.k8s.io/sig-storage/csi-resizer:v1.8.0
   registry.k8s.io/sig-storage/csi-snapshotter:v6.2.2

*
* Copying necessary files

 /root/csm-operator/deploy
 /root/csm-operator/operatorconfig
 /root/csm-operator/samples
 /root/csm-operator/scripts
 /root/csm-operator/README.md
 /root/csm-operator/LICENSE

*
* Compressing release

dell-csm-operator-bundle/
dell-csm-operator-bundle/deploy/
dell-csm-operator-bundle/deploy/operator.yaml
dell-csm-operator-bundle/deploy/crds/
dell-csm-operator-bundle/deploy/crds/storage.dell.com_containerstoragemodules.yaml
dell-csm-operator-bundle/deploy/olm/
dell-csm-operator-bundle/deploy/olm/operator_community.yaml
...
...
dell-csm-operator-bundle/README.md
dell-csm-operator-bundle/LICENSE

*
* Complete

Offline bundle file is: /root/csm-operator/dell-csm-operator-bundle.tar.gz

Unpacking the offline bundle and preparing for installation

This needs to be performed on a Linux system with access to an image registry that will host container images. If the registry requires login, that should be done before proceeding.

To prepare for the driver or Operator installation, the following steps need to be performed:

  1. Copy the offline bundle file created from the previous step to a system with access to an image registry available to your Kubernetes/OpenShift cluster
  2. Expand the bundle file by running tar xvfz <filename>
  3. Run the csi-offline-bundle.sh script and supply the -p option as well as the path to the internal registry with the -r option
    • For Operator installs, the csm-offline-bundle.sh script will be found in the scripts directory

The script will then perform the following steps:

  • Load the required container images into the local system
  • Tag the images according to the user-supplied registry information
  • Push the newly tagged images to the registry
  • Modify the Helm charts or Operator configuration to refer to the newly tagged/pushed images

An example of preparing the bundle for installation for the Dell CSM Operator:

tar xvfz dell-csm-operator-bundle.tar.gz

dell-csm-operator-bundle/
dell-csm-operator-bundle/deploy/
dell-csm-operator-bundle/deploy/operator.yaml
dell-csm-operator-bundle/deploy/crds/
dell-csm-operator-bundle/deploy/crds/storage.dell.com_containerstoragemodules.yaml
dell-csm-operator-bundle/deploy/olm/
dell-csm-operator-bundle/deploy/olm/operator_community.yaml
...
...
dell-csm-operator-bundle/README.md
dell-csm-operator-bundle/LICENSE

cd dell-csm-operator-bundle

bash scripts/csm-offline-bundle.sh -p -r localregistry:5000/dell-csm-operator/

Preparing a offline bundle for installation

*
* Loading docker images

Loaded image: docker.io/dellemc/csi-powerstore:v2.10.1
Loaded image: docker.io/dellemc/csi-isilon:v2.10.1
...
...
Loaded image: registry.k8s.io/sig-storage/csi-resizer:v1.8.0
Loaded image: registry.k8s.io/sig-storage/csi-snapshotter:v6.2.2

*
* Tagging and pushing images

   dellemc/csi-isilon:v2.8.0 -> localregistry:5000/dell-csm-operator/csi-isilon:v2.8.0
   dellemc/csi-metadata-retriever:v1.5.0 -> localregistry:5000/dell-csm-operator/csi-metadata-retriever:v1.5.0
   ...
   ...
   registry.k8s.io/sig-storage/csi-resizer:v1.8.0 -> localregistry:5000/dell-csm-operator/csi-resizer:v1.8.0
   registry.k8s.io/sig-storage/csi-snapshotter:v6.2.2 -> localregistry:5000/dell-csm-operator/csi-snapshotter:v6.2.2

*
* Preparing files within /root/dell-csm-operator-bundle

   changing: dellemc/csi-isilon:v2.8.0 -> localregistry:5000/dell-csm-operator/csi-isilon:v2.8.0
   changing: dellemc/csi-metadata-retriever:v1.5.0 -> localregistry:5000/dell-csm-operator/csi-metadata-retriever:v1.5.0
   ...
   ...
   changing: registry.k8s.io/sig-storage/csi-resizer:v1.8.0 -> localregistry:5000/dell-csm-operator/csi-resizer:v1.8.0
   changing: registry.k8s.io/sig-storage/csi-snapshotter:v6.2.2 -> localregistry:5000/dell-csm-operator/csi-snapshotter:v6.2.2

*
* Complete

Perform either a Helm installation or Operator installation

Now that the required images are available and the Helm Charts/Operator configuration updated, you can proceed by following the usual installation procedure as documented either via Helm or Operator.

NOTES:

  1. Offline bundle installation is only supported with manual installs i.e. without using Operator Lifecycle Manager.
  2. Installation should be done using the files that are obtained after unpacking the offline bundle (dell-csm-operator-bundle.tar.gz) as the image tags in the manifests are modified to point to the internal registry.
  3. Offline bundle installs operator in default namespace via install.sh script. Make sure that the current context in kubeconfig file has the namespace set to default.