## Grafana 安裝 MQTT

## Installing
### Ubuntu 20 supports Grafana v7.0, but we need Grafana 8.0 as it supports streaming data sources (e.g. MQTT).

sudo apt-get install -y gnupg2 curl
curl https://packages.grafana.com/gpg.key | sudo apt-key add -
sudo add-apt-repository "deb https://packages.grafana.com/oss/deb stable main"
sudo apt-get update
sudo apt-get -y install grafana

### Dashboard will be served on port 3000. Default username and password are "admin", you'll be prompted to change password.

## Add MQTT Data Source
#### Install prerequisites

### Yarn

$ curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg | sudo apt-key add -
$ echo "deb https://dl.yarnpkg.com/debian/ stable main" | sudo tee /etc/apt/sources.list.d/yarn.list
$ sudo apt update
$ sudo apt -y install yarn

### Node v14

$ curl -sL https://deb.nodesource.com/setup_14.x | sudo bash -
$ sudo apt update
$ sudo apt -y install nodejs
$ node --version
v14.17.4

### Go

$ sudo apt -y install golang
$ mkdir -p ~/go
$ go version
go version go1.13.8 linux/amd64

### Add the following to your environment (e.g. .bashrc)

$ export GOPATH=~/go
$ export PATH=$PATH:$GOPATH/bin

### Mage

$ go get -u -d github.com/magefile/mage
$ cd $GOPATH/src/github.com/magefile/mage
$ go run bootstrap.go
$ mage -version
Mage Build Tool v1.11.0-2-g4cf3cfc
Build Date: 2021-08-03T11:57:28-07:00
Commit: 4cf3cfc
built with: go1.13.8

### Build data source

$ mkdir grafana-plugins
$ cd grafana-plugins
$ https://github.com/grafana/mqtt-datasource.git
$ cd mqtt-datasource
$ yarn build
$ yarn install

### Add data source to grafana
- Edit /etc/grafana/grafana.ini.

 vi /etc/grafana/grafana.ini

#### Add data source folder
#### Look for # Directory where grafana will automatically scan and look for plugins and update as follows

# Directory where grafana will automatically scan and look for plugins
;plugins = /var/lib/grafana/plugins
plugins = /path/to/grafana-plugins
- Allow unsigned sources
- Look for [plugins] section and update as follows

[plugins]
;enable_alpha = false
;app_tls_skip_verify_insecure = false
Enter a comma-separated list of plugin identifiers to identify plugins that are allowed to be loaded even if they lack a valid signature.
allow_loading_unsigned_plugins = mqtt-datasource

### Restart service

sudo systemctl restart grafana-server