docs: Added general upgrading docs / guide, closes #5905

docs/sources/installation/migrating_to2.md

@@ -3,9 +3,6 @@ title = "Migrating from older versions"
 description = "Upgrading & Migrating Grafana from older versions"
 keywords = ["grafana", "configuration", "documentation", "migration"]
 type = "docs"
-[menu.docs]
-parent = "installation"
-weight = 10
 +++
 
 # Migrating from older versions

docs/sources/installation/provisioning.md

-+++
-title = "Installing via provisioning tools"
-description = "Guide to install Grafana via provisioning tools like puppet & chef"
-keywords = ["grafana", "provisioning", "documentation", "puppet", "chef", "ansible"]
-type = "docs"
-aliases = ["docs/provisioning"]
-[menu.docs]
-parent = "installation"
-weight = 8
-+++
-
-
-# Installing via provisioning tools
-
-Here are links for how to install Grafana (and some include Graphite or
-InfluxDB as well) via a provisioning system. These are not maintained by
-any core Grafana team member and might be out of date.
-
-### Puppet
-
-* [forge.puppetlabs.com/bfraser/grafana](https://forge.puppetlabs.com/bfraser/grafana)
-
-### Ansible
-
-* [github.com/picotrading/ansible-grafana](https://github.com/picotrading/ansible-grafana)
-
-### Docker
-* [github.com/grafana/grafana-docker](https://github.com/grafana/grafana-docker)
-
-### Chef
-
-* [github.com/JonathanTron/chef-grafana](https://github.com/JonathanTron/chef-grafana)
-* [github.com/Nordstrom/grafana2-cookbook](https://github.com/Nordstrom/grafana2-cookbook)
-

docs/sources/installation/upgrading.md

++++
+title = "Upgrading"
+description = "Upgrading Grafana guide"
+keywords = ["grafana", "configuration", "documentation", "upgrade"]
+type = "docs"
+[menu.docs]
+name = "Upgrading"
+identifier = "upgrading"
+parent = "installation"
+weight = 10
++++
+
+# Upgrading Grafana
+
+We recommend everyone to upgrade Grafana often to stay up to date with the latest fixes and enhancements.
+In order make this a reality Grafana upgrades are backward compatible and the upgrade process is simple & quick.
+
+Upgrading is generally always safe (between many minor and one major version) and dashboards and graphs will look the same. There can be minor breaking changes in some edge cases which are usually outlined in the [Release Notes](https://community.grafana.com/c/releases) and [Changelog]https://github.com/grafana/grafana/blob/master/CHANGELOG.md)
+
+## Database Backup
+
+Before upgrading it can be a good idea to backup your Grafana database. This will ensure that you can always rollback to your previous version. During startup, Grafana will automatically migrate the database schema (if there are changes or new tables). Sometimes this can cause issues if you later want to downgrade.
+
+#### sqlite
+
+If you use sqlite you only need to make a backup of you `grafana.db` file. This is usually located at `/var/lib/grafana/grafana.db` on unix system.
+If you are unsure what database you use and where it is stored check you grafana configuration file. If you
+installed grafana to custom location using a binary tar/zip it is usally in `<grafana_install_dir>/data`.
+
+#### mysql
+
+```
+mysqldump -u root -p[root_password] [grafana] > grafana_backup.sql
+```
+
+#### postgres
+```
+pg_dump grafana > grafana_backup
+```
+
+### Ubuntu / Debian
+
+If you installed grafana by downloading a debian package (`.deb`) you can just follow the same installation guide
+and execute the same `dpkg -i` command but with the new package. It will upgrade your Grafana install.
+
+If you used our APT repository:
+
+```
+sudo apt-get update
+sudo apt-get install grafana
+```
+
+#### Upgrading from binary tar file
+
+If you downloaded the binary tar package you can just download and extract a new package
+and overwrite all your existing files. But this might overwrite your config changes. We
+recommend you place your config changes in a file named  `<grafana_install_dir>/conf/custom.ini`
+as this will make upgrades easier without risking losing your config changes.
+
+### Centos / RHEL
+
+If you installed grafana by downloading a rpm package you can just follow the same installation guide
+and execute the same `yum install` or `rpm -i` command but with the new package. It will upgrade your Grafana install.
+
+If you used our YUM repository:
+
+```
+sudo yum update grafana
+```
+
+### Docker
+
+This just an example, details depend on how you configured your grafana container.
+```
+docker pull grafana
+docker stop my-grafana-container
+docker rm my-grafana-container
+docker run --name=my-grafana-container --restart=always -v /var/lib/grafana:/var/lib/grafana
+```
+
+### Windows
+
+If you downloaded the windows binary package you can just download a newer package and extract
+to the same location (and overwrite the existing files). This might overwrite your config changes. We
+recommend you place your config changes in a file named  `<grafana_install_dir>/conf/custom.ini`
+as this will make upgrades easier without risking losing your config changes.
+
+## Upgrading form 1.x
+
+[Migrating from 1.x to 2.x]({{< relref "installation/migrating_to2.md" >}})
+
+## Upgrading form 2.x
+
+We are not aware of any issues upgrading directly from 2.x to 4.x but to on the safe side go via 3.x.