Ubuntu

Recently when working with docker-compose, I met an issue:

No space left on device

The first solution comes up to my mind is add disk space from different partition to the partition that holds docker. But this is difficult. Turns out we have easier problem that we can mount the directory that holds docker data to different directory.

Check the /var/lib/docker, we will see that it belongs to /dev/sdb3

user:/var/lib/docker$ df .
Filesystem     1K-blocks     Used Available Use% Mounted on
/dev/sdb3       58795996 53734356   2045244  97% /

And /dev/sdb3 is about to full.

Check the home directory

user:/home$ df .
Filesystem     1K-blocks      Used Available Use% Mounted on
/dev/sdb4      892956360 429285640 418241268  51%…

Prometheus

Install Prometheus in Ubuntu

Get Prometheus package from https://prometheus.io/download/

tar xvzf prometheus*
cd prometheus*

Config prometheus yaml file

vim prometheus.yml

Example prometheus.yml file

# my global config
global:
  scrape_interval:     15s # Set the scrape interval to every 15 seconds. Default is every 1 minute.
  evaluation_interval: 15s # Evaluate rules every 15 seconds. The default is every 1 minute.
  # scrape_timeout is set to the global default (10s).# Alertmanager configuration
alerting:
  alertmanagers:
  - static_configs:
    - targets:
      # - alertmanager:9093# Load rules once and periodically evaluate them according to the global 'evaluation_interval'.
rule_files:
  # - "first_rules.yml"
  # - "second_rules.yml"# A scrape configuration containing exactly one endpoint to scrape:
# Here it's Prometheus itself.
scrape_configs:
  # The job name is added as a label `job=<job_name>` to any timeseries scraped from this config. …

Example error

go: github.com/account/project-utils@v0.0.0-20201015040921-5f23d1a17a73: invalid version: git fetch -f origin refs/heads/*:refs/heads/* refs/tags/*:refs/tags/* in /home/cuongld/go/pkg/mod/cache/vcs/asshfsfsd: exit status 128: git@github.com: Permission denied (publickey). fatal: Could not read from remote repository. Please make…