Enhance the getting started guide: scheduled backups (#1746)

* Add user guide on how to schedule backups with vtop

Signed-off-by: Florent Poinsard <florent.poinsard@outlook.fr>

* Add bash instruction to code blocks

Signed-off-by: Florent Poinsard <florent.poinsard@outlook.fr>

* Be more clear about why we are expecting to see new pods

Signed-off-by: Florent Poinsard <florent.poinsard@outlook.fr>

* Rephrase the listing backups section

Signed-off-by: Florent Poinsard <florent.poinsard@outlook.fr>

* Apply suggestions from code review

Co-authored-by: Deepthi Sigireddi <deepthi@planetscale.com>
Signed-off-by: Florent Poinsard <35779988+frouioui@users.noreply.github.com>

* Apply review suggestions

Signed-off-by: Florent Poinsard <florent.poinsard@outlook.fr>

---------

Signed-off-by: Florent Poinsard <florent.poinsard@outlook.fr>
Signed-off-by: Florent Poinsard <35779988+frouioui@users.noreply.github.com>
Co-authored-by: Deepthi Sigireddi <deepthi@planetscale.com>

content/en/docs/20.0/user-guides/configuration-advanced/resharding.md

@@ -361,3 +361,8 @@ Beyond this, you will also want to manually delete the on-disk directories assoc
 ```bash
 rm -rf ${VTDATAROOT}/vt_000000020{0,1,2}/
 ```
+
+## Next Steps
+
+Congratulations, you have successfully resharded your `customer` keyspace into two shards.
+Now, let's learn [how to schedule backups](../../operating-vitess/backup-and-restore/scheduled-backups) of your Vitess cluster.

content/en/docs/20.0/user-guides/operating-vitess/backup-and-restore/scheduled-backups.md

@@ -0,0 +1,103 @@
+---
+title: Scheduled Backups
+weight: 5
+aliases: ['/docs/user-guides/backup-and-restore/']
+---
+
+{{< info >}}
+This guide follows on from the Get Started guides. Please make sure that you have
+an [Operator](../../../../get-started/operator) installation ready. It also assumes
+that the [MoveTables](../../../migration/move-tables/) and [Resharding](../../../configuration-advanced/resharding) user guides have been followed (which take you through
+steps `101` to `306`).
+
+This guide is useful only if you are using the vitess-operator.
+{{< /info >}}
+
+## Backups
+
+If you are not already familiar with [how backups work](../overview/) in Vitess we suggest you familiarize yourself with them first.
+
+## Scheduling backups
+
+### Adding the schedule
+
+{{< warning >}}
+Please note that is not recommended to run production backups every minute. These schedules are only an example.
+{{</ warning >}}
+
+For this example we are going to create two schedules: each will be executed every minute, the first one will backup
+the two `customer` shards, and the second one will backup the `commerce` keyspace.
+The backups will be stored directly inside the Minikube node, but if you want to backup to a cloud storage provider like S3, you can
+change the `location` of the backup in `401_scheduled_backups.yaml`.
+
+```bash
+kubectl apply -f 401_scheduled_backups.yaml
+```
+
+After a minute or so, we should see two new pods that were created by the operator. Under the hood, these pods
+are managed by a Kubernetes Job, and their goal is to take a backup of Vitess, as we defined in the `strategies` field
+of the `401_scheduled_backups.yaml` file.
+
+```bash
+$ kubectl get pods
+NAME READY STATUS RESTARTS AGE
+...
+example-vbsc-every-minute-commerce-ac6ff735-1715963880-4rt6r 0/1 Completed 0 31s
+example-vbsc-every-minute-customer-8aaaa771-1715963880-n7cm7 0/1 Completed 0 31s
+...
+```
+
+### Listing backups
+
+Now we can list the available backups, by getting the `vtb` (`VitessBackup`) objects in our Kubernetes cluster.
+We can see we have three backups, that is because the schedule `every-minute-customer` takes two backups (one for each shard, `-80` and `80-`),
+and the other schedule (`every-minute-commerce`) takes only one backup (for the shard `-`). 
+
+```bash
+$ kubectl get vtb --no-headers
+example-commerce-x-x-20240517-163802-97ece60f-8f2a3d47 111s
+example-customer-80-x-20240517-163812-70e40ad-78a0d60b 58s
+example-customer-x-80-20240517-163803-729301e-02e8899b 111s
+```
+
+Since we are running on Minikube, our backups are stored locally on the Minikube node, we can take a look at them like so:
+
+```bash
+$ minikube ssh
+docker@minikube:~$ cd /tmp/example/
+docker@minikube:/tmp/example$ ls
+commerce customer
+docker@minikube:/tmp/example$ ls commerce/-/ customer/
+-80/ 80-/ 
+docker@minikube:/tmp/example$ ls -l commerce/-/ customer/-80/ customer/80-/
+commerce/-/:
+total 0
+drwxr-xr-x 2 999 docker 220 May 17 16:38 2024-05-17.163802.zone1-2548885007
+drwxr-xr-x 2 999 docker 220 May 17 16:39 2024-05-17.163903.zone1-2548885007
+drwxr-xr-x 2 999 docker 220 May 17 16:40 2024-05-17.164003.zone1-2548885007
+drwxr-xr-x 2 999 docker 220 May 17 16:41 2024-05-17.164102.zone1-2548885007
+drwxr-xr-x 2 999 docker 220 May 17 16:42 2024-05-17.164202.zone1-2548885007
+
+customer/-80/:
+total 0
+drwxr-xr-x 2 999 docker 220 May 17 16:38 2024-05-17.163803.zone1-0120139806
+drwxr-xr-x 2 999 docker 220 May 17 16:39 2024-05-17.163902.zone1-2289928654
+drwxr-xr-x 2 999 docker 220 May 17 16:40 2024-05-17.164003.zone1-2289928654
+drwxr-xr-x 2 999 docker 220 May 17 16:41 2024-05-17.164102.zone1-2289928654
+drwxr-xr-x 2 999 docker 220 May 17 16:42 2024-05-17.164202.zone1-2289928654
+
+customer/80-/:
+total 0
+drwxr-xr-x 2 999 docker 220 May 17 16:38 2024-05-17.163812.zone1-0118374573
+drwxr-xr-x 2 999 docker 220 May 17 16:39 2024-05-17.163911.zone1-4277914223
+drwxr-xr-x 2 999 docker 220 May 17 16:40 2024-05-17.164010.zone1-4277914223
+drwxr-xr-x 2 999 docker 220 May 17 16:41 2024-05-17.164111.zone1-4277914223
+drwxr-xr-x 2 999 docker 220 May 17 16:42 2024-05-17.164208.zone1-4277914223
+docker@minikube:/tmp/example$
+```
+
+### Cleanup
+
+Congratulations, you have correctly scheduled recurring backups of your Vitess cluster.
+
+If you want, you can now clean up the entire cluster by running: `minikube delete`.