Configure an External NetApp Deployment as the Storage Backend¶

Configure an external NetApp deployment as the storage backend, after system installation using a StarlingX-provided ansible playbook.

Prerequisites

StarlingX must be installed and fully deployed before performing this procedure.

Procedure

Configure the storage network.

Follow the next steps to configure storage network

If you have not done so already, create an address pool for the storage network. This can be done at any time.

system addrpool-add --ranges <start_address>-<end_address> <name_of_address_pool> <network_address> <network_prefix>

For example:

(keystone_admin)$ system addrpool-add --ranges 10.10.20.1-10.10.20.100 storage-pool 10.10.20.0 24

If you have not done so already, create the storage network using the address pool.

For example:

(keystone_admin)$ system addrpool-list | grep storage-pool | awk '{print$2}' | xargs system network-add storage-net storage true

For each host in the system, do the following:

Lock the host.

(keystone_admin)$ system host-lock <hostname>

Create an interface using the address pool.

For example:

(keystone_admin)$ system host-if-modify -n storage0 -c platform --ipv4-mode static --ipv4-pool storage-pool controller-0 enp0s9

Assign the interface to the network.

For example:

(keystone_admin)$ system interface-network-assign controller-0 storage0 storage-net

Unlock the system.

(keystone_admin)$ system host-unlock <hostname>

Configure NetApps configurable parameters and run the provided install_netapp_backend.yml ansible playbook to enable connectivity to NetApp as a storage backend for StarlingX.
Provide NetApp backend configurable parameters in an overrides yaml file.

You can make changes-in-place to your existing localhost.yml file or create another in an alternative location. In either case, you also have the option of using an ansible vault to secure/encrypt the localhost.yaml file containing sensitive data, i.e, using ansible-vault create $HOME/localhost.yml or ansible-vault edit $HOME/localhost.yml commands.

The following parameters are mandatory:

ansible_become_pass
Provide the admin password.

netapp_backends
name A name for the storage class.

provisioner
This value must be netapp.io/trident.

backendType
This value can be anything but must be the same as StorageDriverName below.

version
This value must be 1.

storageDriverName
This value can be anything but must be the same as backendType below.

managementLIF
The management IP address for the backend logical interface.

dataLIF
The data IP address for the backend logical interface.

svm
The storage virtual machine type to use.

username
The username for authentication against the netapp backend.

password
The password for authentication against the netapp backend.

The following parameters are optional:

trident_setup_dir
Set a staging directory for generated configuration files. The default is /tmp/trident.

trident_namespace
Set this option to use an alternate Kubernetes namespace.

trident_rest_api_port
Use an alternate port for the Trident REST API. The default is 8000.

trident_install_extra_params
Add extra space-separated parameters when installing trident.

For complete listings of available parameters, see

https://opendev.org/starlingx/ansible-playbooks/src/commit/d05785ffd9add6553662fcab43f30bf8d9f6d2e3/playbookconfig/src/playbooks/host_vars/netapp/default.yml

and

https://opendev.org/starlingx/ansible-playbooks/src/commit/d05785ffd9add6553662fcab43f30bf8d9f6d2e3/playbookconfig/src/playbooks/roles/k8s-storage-backends/netapp/vars/main.yml

The following example shows a minimal configuration in localhost.yaml:
```
ansible_become_pass: xx43U~a96DN*m.?
trident_setup_dir: /tmp/trident
netapp_k8s_storageclasses:
    - metadata:
        name: netapp-nas-backend
    provisioner: netapp.io/trident
    parameters:
        backendType: "ontap-nas"

netapp_k8s_snapshotstorageclasses:
    - metadata:
        name: csi-snapclass
    driver: csi.trident.netapp.io
    deletionPolicy: Delete

netapp_backends:
    - version: 1
    storageDriverName: "ontap-nas"
    backendName: "nas-backend"
    managementLIF: "10.0.0.1"
    dataLIF: "10.0.0.2"
    svm: "svm_nfs"
    username: "admin"
    password: "secret"
```
This file is sectioned into netapp_k8s_storageclass, netapp_k8s_snapshotstorageclasses, and netapp_backends. You can add multiple backends and/or storage classes.
Note

To use IPv6 addressing, you must add the following to your configuration:
```
trident_install_extra_params: "--use-ipv6"
```
For more information about configuration options, see https://netapp-trident.readthedocs.io/en/stable-v20.04/kubernetes/operations/tasks/backends/ontap.html.

Note

By default, NetApp is configured to have 777 as unixPermissions. StarlingX recommends changing these settings to make it more secure, for example, "unixPermissions": "755". Ensure that the right permissions are used, and there is no conflict with container security.

Do NOT use 777 as unixPermissions to configure an external NetApp deployment as the Storage backend. For more information, contact NetApp, at https://www.netapp.com/.
Run the playbook.

The following example uses the -e option to specify a customized location for the localhost.yml file.
```
ansible-playbook --ask-vault-pass /usr/share/ansible/stx-ansible/playbooks/install_netapp_backend.yml -e "override_files_dir=</home/sysadmin/mynetappconfig>"
```
Upon successful launch, there will be one Trident pod running on each node, plus an extra pod for the REST API running on one of the controller nodes.

Confirm that the pods launched successfully.

In an all-in-one simplex environment you will see pods similar to the following:

(keystone_admin)$ kubectl -n <tridentNamespace> get pods
NAME                          READY   STATUS    RESTARTS   AGE
trident-csi-c4575c987-ww49n   5/5     Running   0          0h5m
trident-csi-hv5l7             2/2     Running   0          0h5m

Postrequisites

To configure a persistent volume claim for the NetApp backend, add the appropriate storage-class name you set up in step 2 (netapp-nas-backend in this example) to the persistent volume claim’s yaml configuration file. For more information about this file, see StarlingX User Tasks: Create ReadWriteOnce Persistent Volume Claims.

Configure NetApps Using a Private Docker Registry¶

Use the docker_registries parameter to pull from the local registry rather than public ones.

You must first push the files to the local registry.

Configure an External NetApp Deployment as the Storage Backend

Configure an External NetApp Deployment as the Storage Backend¶

Configure NetApps Using a Private Docker Registry¶

StarlingX

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