Grafana Tutorials - InfluxDB Server and telegraf configurations - 01

 Prerequisites:

• Debian OS installed
• OS updates and upgrades must be installed.
• Network must be configured(192.168.138.222)

 

InfluxDB server configurations:

If you're working on large infrastructure you must have these configuration on separate server. For Lab work I have installed it on same server 192.168.138.222.

Installation(Debian Buster):

sudo apt update
sudo apt install -y gnupg2 curl wget

wget -qO- https://repos.influxdata.com/influxdb.key | sudo apt-key add -

echo "deb https://repos.influxdata.com/debian buster stable" | sudo tee /etc/apt/sources.list.d/influxdb.list


sudo apt update
sudo apt install -y influxdb

sudo systemctl enable --now influxdb
systemctl status influxdb

Note: If you have configured firewall you must allow 8086/8088 port.

By default, InfluxDB uses the following network ports:

    TCP port 8086 is used for client-server communication over InfluxDB’s HTTP API
    TCP port 8088 is used for the RPC service for backup and restore


sudo vim /etc/influxdb/influxdb.conf

enable auth-enabled parameter under http


[http]
 auth-enabled = true

Set username/password:

 curl -XPOST "http://localhost:8086/query" --data-urlencode "q=CREATE USER thenabx WITH PASSWORD 'somepassword' WITH ALL PRIVILEGES"


 username:thenabx
 password:somepassword

To login in terminal:

 influx -username 'thenabx' -password 'somepassword'

Once logged in:
> create database 'grafana'
> use grafana
> show measurements

Telegraf Installation:

Telegraf can be installed on any Linux server you want to monitor stats for. But in my case I have installed on grafana server to monitor its stats first. 

sudo apt update
sudo apt install -y gnupg2 curl wget

wget -qO- https://repos.influxdata.com/influxdb.key | sudo apt-key add -

echo "deb https://repos.influxdata.com/debian buster stable" | sudo tee /etc/apt/sources.list.d/influxdb.list

 
sudo apt update

sudo apt install -y telegraf

 

cd /etc/telegraf/

mv telegraf.conf telegraf.conf-default

vim telegraf.conf 

 And add following

#############################################

[global_tags]


# Configuration for telegraf agent
[agent]
    interval = "10s"
    debug = false
    hostname = "server-hostname"
    round_interval = true
    flush_interval = "10s"
    flush_jitter = "0s"
    collection_jitter = "0s"
    metric_batch_size = 1000
    metric_buffer_limit = 10000
    quiet = false
    logfile = ""
    omit_hostname = false

###############################################################################
#                                  OUTPUTS                                    #
###############################################################################

[[outputs.influxdb]]
    urls = ["http://influxdb-ip:8086"]
    database = "database-name"
    timeout = "0s"
    username = "auth-username"
    password = "auth-password"
    retention_policy = ""

###############################################################################
#                                  INPUTS                                     #
###############################################################################

[[inputs.cpu]]
    percpu = true
    totalcpu = true
    collect_cpu_time = false
    report_active = false
[[inputs.disk]]
    ignore_fs = ["tmpfs", "devtmpfs", "devfs"]
[[inputs.io]]
[[inputs.mem]]
[[inputs.net]]
[[inputs.system]]
[[inputs.swap]]
[[inputs.netstat]]
[[inputs.processes]]
[[inputs.kernel]]
########################################

 Change Followings in above configs and save/exit vim.

server-hostname: with your valid hostname.
http://influxdb-ip:8086 with your valid InfluxDB URL, IP address, and port.
database-name with InfluxDB database name for this host
auth-username with InfluxDB http authentication username.
auth-password with InfluxDB http authentication password.

 

systemctl enable telegraf

systemctl start telegraf

systemctl status telegraf

 

 
Grafana Installation:

 To install the latest Enterprise edition:

sudo apt-get install -y apt-transport-https
sudo apt-get install -y software-properties-common wget
wget -q -O - https://packages.grafana.com/gpg.key | sudo apt-key add -

Add this repository for stable releases:

echo "deb https://packages.grafana.com/enterprise/deb stable main" | sudo tee -a /etc/apt/sources.list.d/grafana.list


After you add the repository:

sudo apt-get update
sudo apt-get install grafana-enterprise

sudo systemctl daemon-reload
sudo systemctl start grafana-server
sudo systemctl status grafana-server

Enable port 3000 on OS firewall

http://192.168.138.222:3000

Add Data Source:

Before you can add a dashboard to Grafana for Telegraf system metrics, you need to first import the data source. Login to your Grafana and go to Configuration > Data Sources > Add data source

Provide the following details:

•     Name – Any valid name
•     Type: InfluxDB
•     HTTP URL: InfluxDB URL address e.g http://localhost:8086 for local db server

 

Add Dashboard:
 

The head over to Grafana > Import

 
you can use Grafana dashboard URL or ID – 5955. Under Options section, give it a unique name and select data source added earlier from the drop-down menu and click the import button.

MUST SAVE DASHBOARD IN ORDER TO SEE IT IN CASE SERVER REBOOT.

Done! Your questions are welcomed.

References:

https://grafana.com/docs/grafana/latest/installation/debian/

https://computingforgeeks.com/monitor-linux-system-with-grafana-and-telegraf/

https://computingforgeeks.com/install-influxdb-on-debian-10-buster-linux/