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new 4416ec3 NAS B&R docs (#429)
4416ec3 is described below
commit 4416ec3ce113740abbd5a2ca6cacdc445864260d
Author: Rohit Yadav <rohit.ya...@shapeblue.com>
AuthorDate: Fri Sep 6 15:41:46 2024 +0530
NAS B&R docs (#429)
* NAS B&R docs
Signed-off-by: Rohit Yadav <rohit.ya...@shapeblue.com>
* Update source/adminguide/backup_and_recovery.rst
* Update nas_plugin.rst
* Update nas_plugin.rst
---------
Signed-off-by: Rohit Yadav <rohit.ya...@shapeblue.com>
---
source/adminguide/backup_and_recovery.rst | 6 ++-
source/adminguide/nas_plugin.rst | 86 +++++++++++++++++++++++++++++++
2 files changed, 91 insertions(+), 1 deletion(-)
diff --git a/source/adminguide/backup_and_recovery.rst
b/source/adminguide/backup_and_recovery.rst
index 2fc82d1..bf657b8 100644
--- a/source/adminguide/backup_and_recovery.rst
+++ b/source/adminguide/backup_and_recovery.rst
@@ -28,6 +28,7 @@ The following providers are currently supported:
- VMware with Veeam Backup and Recovery
- KVM with DELL EMC Networker
+- KVM with NAS B&R Plugin (4.20 onwards)
See the Veeam Backup and Recovery plugin documentation for plugin specific
information.
:ref:`Veeam Backup and Recovery Plugin`
@@ -35,6 +36,9 @@ See the Veeam Backup and Recovery plugin documentation for
plugin specific infor
See the DELL EMC Networker Backup and Recovery plugin documentation for plugin
specific information.
:ref:`DELL EMC Networker Backup and Recovery Plugin`
+See the NAS Backup and Recovery plugin documentation for plugin specific
information.
+:ref:`NAS Backup and Recovery Plugin`
+
Backup and Recovery Concepts
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -73,7 +77,7 @@ the Global Settings area of the CloudStack UI.
Configuration Description
================================= ========================
backup.framework.enabled Setting to enable or disable the feature.
Default: false.
-backup.framework.provider.plugin The backup provider (plugin) name. For
example: 'dummy', 'veeam' and 'networker'. This is a zone specific setting.
Default: dummy.
+backup.framework.provider.plugin The backup provider (plugin) name. For
example: 'dummy', 'veeam', 'networker' and 'nas'. This is a zone specific
setting. Default: dummy.
backup.framework.sync.interval Background sync task internal in seconds
that performs metrics/usage stats collection, backup reconciliation and backup
scheduling. Default: 300.
================================= ========================
diff --git a/source/adminguide/nas_plugin.rst b/source/adminguide/nas_plugin.rst
new file mode 100644
index 0000000..9c17802
--- /dev/null
+++ b/source/adminguide/nas_plugin.rst
@@ -0,0 +1,86 @@
+.. Licensed to the Apache Software Foundation (ASF) under one
+ or more contributor license agreements. See the NOTICE file
+ distributed with this work for additional information#
+ regarding copyright ownership. The ASF licenses this file
+ to you under the Apache License, Version 2.0 (the
+ "License"); you may not use this file except in compliance
+ with the License. You may obtain a copy of the License at
+ http://www.apache.org/licenses/LICENSE-2.0
+ Unless required by applicable law or agreed to in writing,
+ software distributed under the License is distributed on an
+ "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ KIND, either express or implied. See the License for the
+ specific language governing permissions and limitations
+ under the License.
+
+.. _NAS Backup and Recovery Plugin:
+
+NAS Backup and Recovery Plugin
+==============================
+
+About the NAS Backup and Recovery Plugin
+----------------------------------------
+
+The NAS Backup and Recovery Plugin provider simple B&R operations for KVM
+instances to any shared storage (NAS). It is based on `libvirt push backup mode
+<https://libvirt.org/kbase/live_full_disk_backup.html>`_
+to take full instance backups (qcow2) and requires libvirt-7.2.0 and QEMU-4.2,
+or high versions on the KVM hosts.
+
+The NAS B&R plugin requires admin to first add backup repositories which are
+network-attached storage (shared storage). Currently it supports NFS, and may
+support other shared storage such as CephFS and CIFS/Samba in future.
+
+When initiating B&R operations on KVM instance, the assigned backup offering
+is used to infer backup repository (NAS) details which are then used to mount
+the shared storage temporarily on the KVM host to peform instance
backup/restore
+disks operations. This also requires that admin installs NAS-storage specific
+utilities on the KVM hosts such as nfs-utils/nfs-common (ceph-common,
cifs-utils).
+
+Consider the following mount, typically performed on a KVM/Linux host to mount
storage:
+
+ mount -t <nas/storage type> -o <mount options> <address> <mount point>
+
+Some examples for variety of shared storage can be:
+
+ mount -t nfs 10.10.1.10:/export /target -o vers=4.2,defaults
+
+ mount -t ceph 10.10.1.10,10.10.1.11,10.10.1.12:/ /target -o
name=user,secret=xyz,defaults
+
+The backup repository is designed to accept these parameters (type, address and
+mount options) as configurations to be used to execute mount operations such as
+illustrated above.
+
+With 'nas' B&R plugin enabled, after a backup repositories are added, root
+admins can create new backup offerings by selecting the zone and the backup
+repository. These backup offerings are then assigned and used with KVM
instances
+to perform support B&R actions and operations.
+
+Support Information and Limitation
+----------------------------------
+
+The NAS B&R plugin has been tested with EL8, EL9, Ubuntu 22.04 and 24.04. Older
+KVM distros such as EL7, Ubuntu 20.04 etc may not work due to libvirt/qemu
+version requirements. Other supported KVM-distros are not tested but may work
+such as OpenSUSE 15, Debian 11 and Debian 12.
+
+Instance backups are full disk backups and limited by libvirt's ability to
+initiate and handle backup. All such backups are exported and stored in qcow2
+format. Due to this, restore operation are supported for volumes of type qcow2
+and limited to NFS and local storage based primary storage pools.
+
+For running instances, their disks (of any format/storage type) are backed up
by
+libvirtd's push based efficient-backup mechanism exported as qcow2 disks on the
+backup repository.
+
+For stopped instances, `qemu-img` is used to convert and export full-disk
backup
+in qcow2 format to the backup repository.
+
+For restore operations, the KVM instance must be stopped in CloudStack.
+Currently, only volume(s) restoration is supported only to NFS and local
storage
+based primary storage pools, and restored volumes are fully baked disks (i.e.
+not using any backing template file).
+
+Restoring fully expunged and unmanaged instances are not supported. Backup and
+restore operations are not fully supported for CKS cluster instances and should
+be avoided.
