Category: Linux

influxd-systemd-start.sh[PID]: Failed to reach influxdb http endpoint at http://localhost:8086/health

on my Raspi4 the last installed influxd-package was no more able to start the service.
CPU-load was at 100%, the “systemctl start influxd” routine was running in a loop.
As the smarthome generates many data the service took longer to start as expected by the new startup-script influxd-systemd-start.sh .

Fix:
in ./usr/lib/influxdb/scripts/influxd-systemd-start.sh:

increase the sleep timer (in my case from 1 to 5):

...
while [ "$result" != "200" ]; do
  sleep 5
  result=$(curl -k -s -o /dev/null $url -w %{http_code})
...

Done!

daily compression of InfluxDB

InfluxDB is an open source time series database built by InfluxData and used in e.g. Openhab for data persistance.
For small computers like raspi’s it is a best practice to compress the database regurlarly.

Why not using cron ?

Well, it works.. the only (security)-drawback is to grant /bin/bash to the influx-user:

cat /etc/cron.daily/00influx:

#!/bin/bash
#execute
/home/pi/1_influxrepair.sh


cat /home/pi/1_influxrepair.sh:

#!/bin/bash
service influxdb stop
echo "before su"
su influxdb -c /home/pi/1_subscript.sh
echo "after su"
whoami
service influxdb start

cat /home/pi/1_subscript.sh:

#!/bin/bash
echo "now in sub shell"
whoami
cd /var/lib/influxdb
influx_inspect buildtsi -compact-series-file -datadir ./data -waldir ./wal
exit
echo "exiting sub shell"

cat /etc/passwd|grep infl:

modify influxdb:/bin/bash

done!