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@drmalex07
drmalex07 / README-oneshot-systemd-service.md
Last active July 7, 2024 19:47
An example with an oneshot service on systemd. #systemd #systemd.service #oneshot

README

Services declared as oneshot are expected to take some action and exit immediatelly (thus, they are not really services, no running processes remain). A common pattern for these type of service is to be defined by a setup and a teardown action.

Let's create a example foo service that when started creates a file, and when stopped it deletes it.

Define setup/teardown actions

Create executable file /opt/foo/setup-foo.sh:

@bmuschko
bmuschko / OfflineMavenRepository.groovy
Created December 4, 2015 04:58
Creating an offline Maven repository with Gradle
package org.gradle.training
import org.gradle.api.tasks.Input
import org.gradle.api.tasks.OutputDirectory
import org.gradle.api.tasks.TaskAction
import org.gradle.api.DefaultTask
import org.gradle.util.GFileUtils
import org.gradle.api.artifacts.Configuration
import org.gradle.api.artifacts.component.ModuleComponentIdentifier
import org.gradle.maven.MavenModule
@mark-adams
mark-adams / lift_json.rb
Created November 30, 2015 05:12
A handy fluentd filter for lifting out nested json log messages from Docker logs.
module Fluent
class LiftJsonFilter < Filter
Fluent::Plugin.register_filter('lift_json', self)
def filter(tag, time, record)
begin
record = record.merge JSON.parse(record['log'])
record.delete 'log'
rescue Exception
end
@samatjain
samatjain / Encrypted-Amazon-Cloud-Drive.md
Last active May 18, 2017 18:50
Setting up a encrypted drive on Amazon Cloud Drive w/ EncFS and acd_cli

Environment

export ACD_LOCAL=$HOME/.cache/Amazon-Cloud-Drive

# To use this file later
export ENCFS6_CONFIG=$ACD_LOCAL/encfs6.xml

Setup

mkdir -p \

@quiver
quiver / retrieve-EC2-region-information-from-metadata.md
Last active March 14, 2024 16:42
retrieve EC2's region from instance metadata

Sometimes you want to retrieve EC2 insntances' region information.

You can query that information through instance metadata(169.254.169.254).

$ curl --silent http://169.254.169.254/latest/dynamic/instance-identity/document
{
  "privateIp" : "172.31.2.15",
  "instanceId" : "i-12341ee8",
  "billingProducts" : null,
 "instanceType" : "t2.small",
@samkeen
samkeen / ec2-instance-subnet-id.md
Last active January 23, 2024 17:07
Get the subnet and VPC id of a running EC2 instance

First get the Interface mac address, then use that to run the full command

INTERFACE=$(curl --silent http://169.254.169.254/latest/meta-data/network/interfaces/macs/)
SUBNET_ID=$(curl --silent http://169.254.169.254/latest/meta-data/network/interfaces/macs/${INTERFACE}/subnet-id)
VPC_ID=$(curl --silent http://169.254.169.254/latest/meta-data/network/interfaces/macs/${INTERFACE}/vpc-id)

echo SUBNET_ID
@uupaa
uupaa / image.resize.in.github.flavored.markdown.md
Last active April 22, 2025 11:44
image resize in github flavored markdown.

Image source

https://gyazo.com/eb5c5741b6a9a16c692170a41a49c858.png

Try resize it!

  • ![](https://gyazo.com/eb5c5741b6a9a16c692170a41a49c858.png | width=100)
@sighingnow
sighingnow / Makefile
Last active March 8, 2025 17:56
Detect operating system in Makefile.
# Detect operating system in Makefile.
# Author: He Tao
# Date: 2015-05-30
OSFLAG :=
ifeq ($(OS),Windows_NT)
OSFLAG += -D WIN32
ifeq ($(PROCESSOR_ARCHITECTURE),AMD64)
OSFLAG += -D AMD64
endif
@stephen-mw
stephen-mw / ec2list.go
Last active December 14, 2017 01:38
Ec2 list in go
package main
import (
"fmt"
"github.com/awslabs/aws-sdk-go/aws"
"github.com/awslabs/aws-sdk-go/service/ec2"
"github.com/vaughan0/go-ini"
"net/url"
"os"
"runtime"
@hudon
hudon / docker-log-truncate
Last active November 9, 2016 06:06
Automatically truncate docker logs on a coreos machine
cat > /var/tmp/log-truncate <<EOF
#!/bin/sh
set -eux
cd /var/lib/docker/containers
for id in *
do
logfile="\${id}/\${id}-json.log"
[ -e "\${logfile}" ] && truncate -s 0 "\${logfile}"
done
btrfs balance start -v -dusage=20 /var/lib/docker/btrfs