Create INSTALL_COLLECTOR_SYNOLOGY_AARCH64.md

A little tutorial to get the collector running on Synology

docs/INSTALL_COLLECTOR_SYNOLOGY_AARCH64.md

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+# Install collector on Synology
+
+### Install Entware
+
+This will allow you to install a newer version of smartmontools on your Synology. Follow the instructions here (This is tested on DSM7) - https://github.com/Entware/Entware/wiki/Install-on-Synology-NAS
+
+**PLEASE NOTE THAT IF YOU UPDATE DSM FIRMWARE YOU MAY BORK THE EXISTING ENTWARE INSTALLATION, FOR ANYTHING THAT MAY RELATE TO ENTWARE PLEASE VISIT THEIR REPO**
+
+## Collector Setup
+
+**1. Run an update**
+
+`sudo opkg update`
+
+**2. Run an upgrade**
+
+`sudo opkg upgrade`
+
+**3. Install smartmontools**
+
+`sudo opkg install smartmontools`
+
+*It should install v7.2-2*
+
+`Installing smartmontools (7.2-2) to root...`
+
+**4. We will now create the directories.**
+
+```
+mkdir -p /volume1/\@Entware/scrutiny/bin
+mkdir -p /volume1/\@Entware/scrutiny/conf
+```
+
+**5. change into the bin directory**
+
+`cd /volume1/\@Entware/scrutiny/bin`
+
+**6. Download the collector binary for your architecture and make it executable**
+
+`wget https://github.com/AnalogJ/scrutiny/releases/download/v0.4.12/scrutiny-collector-metrics-linux-arm64`
+
+`chmod +x /volume1/\@Entware/scrutiny/bin/scrutiny-collector-metrics-linux-arm64`
+
+**7. Create a config file for the collector**
+
+```
+cd /volume1/\@Entware/scrutiny/conf
+wget https://raw.githubusercontent.com/AnalogJ/scrutiny/master/example.collector.yaml
+mv example.collector.yaml collector.yaml
+```
+
+**8. Lets make some changes in the config file, these are what i uncommented/added, please tweak the device paths to your needs**
+
+```
+host:
+  id: 'Server_Name'
+
+
+devices:
+#  # example for forcing device type detection for a single disk
+ - device: /dev/sda
+   type: 'sat'
+ - device: /dev/sdb
+   type: 'sat'
+ - device: /dev/sdc
+   type: 'sat'
+ - device: /dev/sdd
+   type: 'sat'
+    
+api:
+ endpoint: 'http://<url>:8080'
+```
+
+**9. Let's update the smartd db**
+
+```
+cd /volume1/\@Entware/scrutiny/bin/
+wget https://raw.githubusercontent.com/smartmontools/smartmontools/master/smartmontools/drivedb.h
+```
+
+**10. I ran it like this but you can tweak to your liking, the most important part is the --drivedb, as this loads it into the aplication for future use**
+
+`smartctl -d sat --all /dev/sda  --drivedb=/volume1/\@Entware/scrutiny/bin/drivedb.h`
+
+**11. Now lets create a small bash script, this will be used for the scheduled task inside Synology**
+
+`vim /volume1/\@Entware/scrutiny/bin/run_collect.sh`
+
+**The contents are below, copy and paste them in**
+
+```
+#!/bin/bash
+
+/volume1/\@Entware/scrutiny/bin/scrutiny-collector-metrics-linux-arm64 run --config /volume1/\@Entware/scrutiny/config/collector.yaml
+```
+
+## Set up Synology to run a scheduled task. 
+
+Log in to DSM and do the following:
+
+Goto: DSM > Control Panel > Task Scheduler
+
+Create > Scheduled Task > User Defined Script
+
+###### General
+
+```
+Task: Scrutiny_Collector
+User: root
+Enabled: yes
+```
+
+###### Schedule
+```
+Run on the following days: Daily
+```
+###### Time:
+
+```
+Frequency: <Your desired frequency>
+```
+
+###### Task Settings
+
+**Run Command**
+
+```
+. /opt/etc/profile; /volume1/\@Entware/scrutiny/bin/run_collect.sh
+```