scy

Opening and closing an SSH tunnel in a shell script the smart way

I recently had the following problem:

• From an unattended shell script (called by Jenkins), run a command-line tool that accesses the MySQL database on another host.
• That tool doesn't know that the database is on another host, plus the MySQL port on that host is firewalled and not accessible from other machines.

We didn't want to open the MySQL port to the network, but it's possible to SSH from the Jenkins machine to the MySQL machine. So, basically you would do something like

ssh -L 3306:localhost:3306 remotehost

simonw

import json, datetime

class RoundTripEncoder(json.JSONEncoder):
    DATE_FORMAT = "%Y-%m-%d"
    TIME_FORMAT = "%H:%M:%S"
    def default(self, obj):
        if isinstance(obj, datetime.datetime):
            return {
                "_type": "datetime",
                "value": obj.strftime("%s %s" % (

jmvrbanac

#!/bin/bash

sudo apt-get install git python-pip make build-essential libssl-dev zlib1g-dev libbz2-dev libreadline-dev libsqlite3-dev curl
sudo pip install virtualenvwrapper

git clone https://github.com/yyuu/pyenv.git ~/.pyenv
git clone https://github.com/yyuu/pyenv-virtualenvwrapper.git ~/.pyenv/plugins/pyenv-virtualenvwrapper

echo 'export PYENV_ROOT="$HOME/.pyenv"' >> ~/.bashrc
echo 'export PATH="$PYENV_ROOT/bin:$PATH"' >> ~/.bashrc

robinkraft

# Compile/install GEOS. Taken from:
# http://grasswiki.osgeo.org/wiki/Compile_and_Install_Ubuntu#GEOS_2

cd /tmp
wget http://download.osgeo.org/geos/geos-3.4.2.tar.bz2
bunzip2 geos-3.4.2.tar.bz2
tar xvf  geos-3.4.2.tar

cd geos-3.4.2

magnetikonline

NSSM cheatsheat

See: NSSM - the Non-Sucking Service Manager

• Create a new service
• List parameters for a service
• Set a parameter for a service
• Parameter list

Create a new service

Jaza

*

chinshr

#!groovy
# Best of Jenkinsfile
# `Jenkinsfile` is a groovy script DSL for defining CI/CD workflows for Jenkins
node {
}

jpf

Introduction

This is a guide to using pyjwt to sign and validate a JWT using RS256.

The trickiest part of doing this is knowing what the proper OpenSSL commands are to generate the RSA keypair. I demonstrate that below.

Generating RSA keys

john-science

Reading & Writing GZIP Files in Python

I have been testing various ways to read and write text files with GZIP in Python. There were a lot of uninteresting results, but there were two I thought were worth sharing.

Writing GZIP files

If you have a big list of strings to write to a file, you might be tempted to do:

f = gzip.open(out_path, 'wb')

for line in lines:

Faheetah

node {
    echo 'Results included as an inline comment exactly how they are returned as of Jenkins 2.121, with $BUILD_NUMBER = 1'
    echo 'No quotes, pipeline command in single quotes'
    sh 'echo $BUILD_NUMBER' // 1
    echo 'Double quotes are silently dropped'
    sh 'echo "$BUILD_NUMBER"' // 1
    echo 'Even escaped with a single backslash they are dropped'
    sh 'echo \"$BUILD_NUMBER\"' // 1
    echo 'Using two backslashes, the quotes are preserved'
    sh 'echo \\"$BUILD_NUMBER\\"' // "1"