Tharwat Abou-Helal Tharwat96

Docker Cheat Sheet

Copy a file from host to container:

docker cp file.xz container_name:/tmp/file.xz

List all containers with their volumes

docker ps -a --format '{{ .ID }}' | xargs -I {} docker inspect -f '{{ .Name }}{{ printf "\n" }}{{ range .Mounts }}{{ printf "\n\t" }}{{ .Type }} {{ if eq .Type "bind" }}{{ .Source }}{{ end }}{{ .Name }} => {{ .Destination }}{{ end }}{{ printf "\n" }}' {}

List the active account name

gcloud auth list

Set the compute zone

gcloud config set compute/zone us-central1-a

Creates a cluster called bootcamp with 5 nodes (including the master)

gcloud container clusters create bootcamp --num-nodes 5 --scopes "https://www.googleapis.com/auth/projecthosting,storage-rw"

	# describe ec2 instance
	aws ec2 --region us-east-1 describe-instances --instance-ids i-xxxxxxxxxxx

	# associate iam instance profile to running instance
	aws ec2 associate-iam-instance-profile --instance-id i-xxxxxxxxxxx --iam-instance-profile Name=xxxxxxxxx

	import hudson.model.*
	import hudson.security.*
	import hudson.tasks.Mailer

	def userId = args[0]
	def password = args[1]
	def email = args[2]
	def instance = jenkins.model.Jenkins.instance
	def existingUser = instance.securityRealm.allUsers.find {it.id == userId}

	# This is a comment, we will use comments to explain.
	# There are three types of data in YAML:
	# - key value pair, lists/arrays, dictionaries

	# key value pair:
	Fruit: Apple
	Vegetable: Carrot
	Liquid: Water
	Meat: Chicken

	// any file to use the Eloquent driver

	<?php
	require "../vendor/autoload.php";
	require "../config/database.php";
	use Illuminate\Database\Capsule\Manager as Capsule;

	$dbclass = new Database();
	$capsule = new Capsule();
	$capsule->addConnection($dbclass->EloquentConnection());

	# delete all pods that are evicted

	kubectl get pods --all-namespaces \| grep Evicted \| awk '{print $2 " --namespace=" $1}' \| xargs kubectl delete pod

	# delete all pods that are erroring and sleep a bit to avoid rate limit
	# you can add head or tail to work in batches

	kubectl get pods --all-namespaces \| grep 'Evicted\\|Error\\|ContainerStatusUnknown' \| awk '{print $2 " --namespace=" $1}' \| xargs -I % sh -c '{ kubectl delete pod %; sleep 0.1; }'

	# print all failing pods with their describe reason of failiure

	# sort all branches in repository by date updated
	git for-each-ref --sort=committerdate refs/heads/ --format="%(HEAD) %(color:yellow)%(refname:short)%(color:reset) - %(color:red)%(objectname:short)%(color:reset) - %(authorname) (%(color:green)%(committerdate:relative)%(color:reset))" --no-merged=origin/HEAD refs/remotes/origin

	[Unit]
	Description=Gitea (Git with a cup of tea)
	After=syslog.target
	After=network.target
	#After=mysqld.service
	#After=postgresql.service
	#After=memcached.service
	#After=redis.service

	[Service]

	# delete last commit without losing changes
	git reset HEAD^