Joachim Kruithof misterjoa

Docker compose as a systemd unit

Create file /etc/systemd/system/[email protected]. SystemD calling binaries using an absolute path. In my case is prefixed by /usr/local/bin, you should use paths specific for your environment.

[Unit]
Description=%i service with docker compose
Requires=docker.service
After=docker.service

This is probably a common issue for people who wants to deploy serveral repository on one VPS or VM.

This is not going to be rocket science.

The first step is to generate your first ssh key, for this type the following command line in your terminal: ssh-keygen -t rsa -b 4096 -C "[email protected]" When the command CLI is asking you if you want to use a passphrase you might want to press ENTER in order to don't have to type it everytime you will want to pull your repository.

Now copy the content of your public key and add it to Github in your first repository (Settings > Deploy keys). For example on debian it might be:

Python list & dict comprehensions translated to JavasScript

Comprehensions are a really useful feature of Python that aren't available in JavaScript (or many languages). These concepts of course can be tranlsated into using map instead. But especially the dictionaries are a bit trickier.

Lists / Arrays

This one is easy as they translate very simply to map.

>>> foobar = range(5)
>>> [x + 1 for x in foobar]

Module autoreload

To auto-reload modules in jupyter notebook (so that changes in files *.py doesn't require manual reloading):

# for auto-reloading external modules
# see http://stackoverflow.com/questions/1907993/autoreload-of-modules-in-ipython
%load_ext autoreload
%autoreload 2

UPDATE (March 2020, thanks @ic): I don't know the exact AMI version but yum install docker now works on the latest Amazon Linux 2. The instructions below may still be relevant depending on the vintage AMI you are using.

Amazon changed the install in Linux 2. One no-longer using 'yum' See: https://aws.amazon.com/amazon-linux-2/release-notes/

Docker CE Install

sudo amazon-linux-extras install docker
sudo service docker start

	Key-Type: 1
	Key-Length: 2048
	Subkey-Type: 1
	Subkey-Length: 2048
	Name-Real: Root Superuser
	Name-Email: [email protected]
	Expire-Date: 0

	# Generate a unique private key (KEY)
	sudo openssl genrsa -out mydomain.key 2048

	# Generating a Certificate Signing Request (CSR)
	sudo openssl req -new -key mydomain.key -out mydomain.csr

	# Creating a Self-Signed Certificate (CRT)
	openssl x509 -req -days 365 -in mydomain.csr -signkey mydomain.key -out mydomain.crt

	# Append KEY and CRT to mydomain.pem

	def bytesto(bytes, to, bsize=1024):
	"""convert bytes to megabytes, etc.
	sample code:
	print('mb= ' + str(bytesto(314575262000000, 'm')))

	sample output:
	mb= 300002347.946
	"""

	a = {'k' : 1, 'm': 2, 'g' : 3, 't' : 4, 'p' : 5, 'e' : 6 }

	Listing queues ...
	hipri 5
	lopri 0
	midpri 0
	...done.

	[[source]]
	name = "pypi"
	url = "https://pypi.org/simple"
	verify_ssl = true

	[dev-packages]

	[packages]
	docopt = "*"