Hi I have a kubernetes cluster running in Amazon EKS, we are using the prometheus node-exporter docker image and running it as daemonset across all k8s nodes to fetch the node metrics. We had a use case to monitor the docker volumes usage on each node, I have written a shell script to fetch the data in the prometheus readable format
``` #! /bin/bash hostip=$(curl -fs http://169.254.169.254/latest/meta-data/local-ipv4) voulume_size=`df -Ph /var/lib/docker | awk '{if(NR>1)print $2}' | sed 's/G//g'` voulume_usage=`df -Ph /var/lib/docker | awk '{if(NR>1)print $5}' | sed 's/%//g'` `mkdir -p /home/ec2-user/node_exporter/textfile_collector` `rm -f /home/ec2-user/node_exporter/textfile_collector/docker_volume.prom` echo "# HELP _docker_volume_usage hostip usage." >> /home/ec2-user/node_exporter/textfile_collector/docker_volume.prom 2>&1 echo "# TYPE _docker_volume_usage gauge" >> /home/ec2-user/node_exporter/textfile_collector/docker_volume.prom 2>&1 echo "_docker_volume_usage{hostip=\"$hostip\",host=\"`hostname`\"} $voulume_usage" >> /home/ec2-user/node_exporter/textfile_collector/docker_volume.prom 2>&1 echo "# HELP _docker_volume_size hostip size." >> /home/ec2-user/node_exporter/textfile_collector/docker_volume.prom 2>&1 echo "# TYPE _docker_volume_size gauge" >> /home/ec2-user/node_exporter/textfile_collector/docker_volume.prom 2>&1 echo "_docker_volume_size{hostip=\"$hostip\",host=\"`hostname`\"} $voulume_size" >> /home/ec2-user/node_exporter/textfile_collector/docker_volume.prom 2>&1 ``` I'm running the script on each node and adding the data to */home/ec2-user/node_exporter/textfile_collector/docker_volume.prom* file. On the docker logs I see the below ERROR: ``` level=error ts=2021-01-21T08:44:45.125Z caller=textfile.go:197 collector=textfile msg="failed to read textfile collector directory" path=/home/ec2-user/node_exporter/textfile_collector err="open /home/ec2-user/node_exporter/textfile_collector: no such file or directory" ``` Let me know where am I going wrong, I now had a doubt that whether the *textfile-collector* from the docker container colect data from the node in which the container is running! Any help over here would be appreciated. Thanks, Rohith Vallabhaneni. -- You received this message because you are subscribed to the Google Groups "Prometheus Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/prometheus-users/bd449370-517d-45bd-ba80-6501088acc42n%40googlegroups.com.
