# Upgrade Guide - Scylla Monitoring 2.x to Scylla Monitoring 2.y

This document is a step by step procedure for upgrading  ScyllaDB Monitoring Stack from version 2.x to 2.y, for example, between 2.0 to 2.1.

## Upgrade Procedure

We recommend installing the new release next to the old one, running both in parallel, and making sure it is working as expected before uninstalling the old version.

Change to the directory you want to install the new Monitoring stack.
Download the latest release:
You can download the .zip or the .tar.

### Install 2.y (The new version)

```bash
wget -L https://github.com/scylladb/scylla-monitoring/archive/scylla-monitoring-2.y.zip
unzip scylla-monitoring-2.y.zip
cd scylla-monitoring-scylla-monitoring-2.y/
```

Replace “y” with the new minor release number, for example, 2.1.zip

### Setting the server’s files

Copy the `scylla_servers.yml` and `node_exporter_servers.yml` from the version that is already installed.

```bash
cp /path/to/monitoring/2.x/prometheus/scylla_servers.yml prometheus/
cp /path/to/monitoring/2.x/prometheus/node_exporter_servers.yml prometheus/
```

### Validate the new version is running the correct version

Starting from Scylla-Monitoring version 2.2, you can run:

```bash
./start-all.sh --version
```

To validate the Scylla-Monitoring version.

### Validate the version installed correctly

To validate that the Monitoring stack starts correctly, first in parallel to the current (2.x) stack.

```bash
./start-all.sh -p 9091 -g 3001 -m 9095
```

Browse to `http://{ip}:9091`
And check the Grafana dashboard

Note that we are using different ports numbers for Grafana, Prometheus, and the Alertmanager.

When you are satisfied with the data in the dashboard, you can shut down the containers.

Use the following command to kill the containers:

```bash
./kill-all.sh -p 9091 -g 3001 -m 9095
```

You can start and stop the new 2.y version while testing.

### Move to version 2.y (the new version)

Note: migrating will cause a few seconds of blackout in the system.

We assume that you are using external volume to store the metrics data.

#### Kill all containers

Follow the instruction on how to kill the 2.y version when in testing mode.

To kill the 2.x version containers, run:

```bash
./kill-all.sh
```

Start version 2.y in normal mode

From the new root of the scylla-monitoring-scylla-monitoring-2.y run

```bash
./start-all.sh -d /path/to/data/dir
```

Point your browser to `http://{ip}:3000` and see that the data is there.

### Rollback to version 2.x

To rollback during the testing mode, kill the 2.y containers as explained above, and the system will continue to operate normally.

To rollback to version 2.x after you completed the moving to version 2.y (as shown above).
Run:

```bash
./kill-all.sh
cd /path/to/scylla-grafana-2.x/
./start-all.sh -d /path/to/data/dir
```

## Related Links

* [Upgrade](https://monitoring.docs.scylladb.com/stable/upgrade/index.md)