InfluxDB¶
Checkout the official pages for Telegraf and InfluxDB
# shell: docker-compose exec influxdb influx -precision rfc3339
influxdb:
image: influxdb
restart: always
environment:
- "INFLUXDB_GRAPHITE_ENABLED=1"
#volumes:
# - "influx-data:/var/lib/influxdb"
# - "/srv/main/influxdb/influxdb.conf:/etc/influxdb/influxdb.conf"
networks:
monitoring:
ipv4_address: 192.168.2.254
# ...
volumes:
influx-data:
Unfortunately you need to copy some file out of the container before you can use influxdb:
sudo mkdir -p /srv/main/influxdb
sudo docker-compose up -d influxdb
sudo docker cp main_influxdb_1:/var/lib/influxdb \
/srv/main/influxdb/lib
sudo docker cp main_influxdb_1:/etc/influxdb/influxdb.conf \
/srv/main/influxdb/influxdb.conf
Afterwards you can remove the comments in front of the volumes and start up the container.
Telegraf Collecting Agent on the host system¶
sudo apt install apt-transport-https wget gnupg
wget -qO- https://repos.influxdata.com/influxdb.key | sudo apt-key add -
echo "deb https://repos.influxdata.com/debian buster stable" | sudo tee -a /etc/apt/sources.list.d/influxdb.list
sudo apt update
sudo apt install telegraf
In terms of configuration you first have to disable the influxdb output in the telegraf.conf.
We are not going to use it, because it might be overwritten on telegraf updates.
Just search for [[outputs.influxdb]] and put a # in front of it to mark it as a comment.
The telegraf daemon will try to send data to the default url which is localhost:8086.
In our case, with influxdb inside the docker helper network, monitoring we will reach the influxdb on the ip address 192.168.2.254.
# configure telegraf (hostname.conf should match your hostname)
sudo cp /etc/telegraf/telegraf.{conf,d/hostname.conf}
sudo vim /etc/telegraf/telegraf.{conf,d/hostname.conf}
...
###############################################################################
# OUTPUT PLUGINS #
###############################################################################
# Configuration for sending metrics to InfluxDB
#[[outputs.influxdb]] # <-- comment this out
## The full HTTP or UDP URL for your InfluxDB instance.
##
## Multiple URLs can be specified for a single cluster, only ONE of the
## urls will be written to each interval.
# urls = ["unix:///var/run/influxdb.sock"]
# urls = ["udp://127.0.0.1:8089"]
# urls = ["http://127.0.0.1:8086"]
...
Afterwards we are going to edit the copied telegraf configuration (/etc/telegraf/telegraf.d/hostname.conf). Just add the correct urls entry in the influxdb output area to get basic reporting which is enabled by default.
...
###############################################################################
# OUTPUT PLUGINS #
###############################################################################
# Configuration for sending metrics to InfluxDB
[[outputs.influxdb]]
## The full HTTP or UDP URL for your InfluxDB instance.
##
## Multiple URLs can be specified for a single cluster, only ONE of the
## urls will be written to each interval.
# urls = ["unix:///var/run/influxdb.sock"]
# urls = ["udp://127.0.0.1:8089"]
# urls = ["http://127.0.0.1:8086"]
urls = ["http://192.168.2.254:8086"] # <-- add this line
...
Finally you can restart the telegraf agent
sudo systemctl restart telegraf
You might also would like to enable authentication!