Kanrisuru

Kanrisuru (manage) helps you remotely control infrastructure using Ruby. This is done over SSH. I'm working on building up some basic functionality to help quickly provision, deploy and manage a single host or cluster of hosts.

The idea behind this project is not to replace the numerous other projects to manage your infrastrucutre, however, I've found there usually meant to be a standalone project that have their own ecosystem. With Kanrisuru, you essentailly plug the library directly into your ruby project.

At this point, Kanrisuru doesn't use a DSL, or offer idempotency, and while that may be added later on, the goal with this project is to expose helpful ways of managing your remote infrastructure with plain ruby in a procedural manner. The realization I had was when trying to deal with other open source projects, you either had to deal with a different language than ruby, use agents on remote hosts, or deal with a complex library that is meant to act in a declarative manner.

If you want to dynamically interact with a host, eg: If you need to dynamically scale your infrastructure by continually monitoring specific stats from a centralized system, Kanrisuru can help you accomplish this.

Installation

Add this line to your application's Gemfile:

gem 'kanrisuru'

And then execute:

$ bundle install

Or install it yourself as:

$ gem install kanrisuru

Usage

Run basic commands you would have access to while running on a remote host or on a cluster of hosts.

Host

host = Kanrisuru::Remote::Host.new(host: 'host', username: 'ubuntu', keys: ['~/.ssh/id_rsa'])
result = host.whoami   
result.to_s						# => 'ubuntu'

result = host.pwd
result.path 					# => /home/ubuntu 

Cluster

cluster = Kanrisuru::Remote::Cluster.new([{
  host: 'host1', username: 'ubuntu', keys: ['~/.ssh/id_rsa']
}, {
  host: 'host2', username: 'alice', keys: ['~/.ssh/id_rsa']
})

cluster.whoami   # => {host: 'host1', result: 'ubuntu'}, {host: 'host2', result: 'alice'}
cluster.pwd      # => {host: 'host1', result: '/home/ubuntu'}, {host: 'host2', result: '/home/alice'}

cluster.each do |host|
  host.pwd.path  # => /home/ubuntu
end

Host or Cluster with underlying command

host = Kanrisuru::Remote::Host.new(host: 'host1', username: 'ubuntu', keys: ['~/.ssh/id_rsa'])

command = Kanrisuru::Command.new('uname')
host.execute(command)

command.success? #=> true
command.to_s  #=> Linux

cluster = Kanrisuru::Remote::Cluster.new([host, {host: 'host2', username: 'alice', keys: ['~/.ssh/id_rsa']}])

cluster.execute('uname') #=> {host: 'host1', result: 'Linux'}, {host: 'host2', result: 'Linux'}

Methods and Testing

Description	Ruby	Shell	Module	Man	Debian	Ubuntu	Fedora	Centos	RHEL	openSUSE	SLES
System
Get CPU Info	cpu_info	lscpu	core	https://linux.die.net/man/1/lscpu	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get Load Average	load_average	cat /proc/load_avg	core		[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get RAM Available	free	cat /proc/meminfo	core		[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get list of processes	ps	ps	core	https://linux.die.net/man/1/ps	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get Env vars	load_env	env	core		[x]	[x]	[x]	[x]	[x]	[x]	[x]
Kill process	kill	kill	core	https://linux.die.net/man/1/kill	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get uptime of system	uptime	cat /proc/uptime	core	https://linux.die.net/man/1/uptime	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get who's logged in	w	w	core	https://linux.die.net/man/1/w	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Reboot machine	reboot	shutdown	core	https://linux.die.net/man/8/reboot	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Poweroff machine	poweroff	shutdown	core	https://linux.die.net/man/8/shutdown	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Disk
Get Disk Space	df	df	core	https://linux.die.net/man/1/df	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get Disk Usage	du	du	core	https://linux.die.net/man/1/du	[x]	[x]	[x]	[x]	[x]	[x]	[x]
List block devices	lsblk	lsblk	core	https://linux.die.net/man/8/lsblk	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get block device attributes	blkid	blikd	core	https://linux.die.net/man/8/blkid	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Mount
Mount a filesystem	mount	mount	core	https://linux.die.net/man/8/mount
Unmount a filesystem	umount	umount	core	https://linux.die.net/man/8/umount
Group
Get Group Id	get_gid	getent group	core	https://linux.die.net/man/1/getent	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get Group	get_group	grep /etc/group	core		[x]	[x]	[x]	[x]	[x]	[x]	[x]
Create Group	create_group	groupadd	core	https://linux.die.net/man/8/groupadd	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Update Group	update_group	groupmod	core	https://linux.die.net/man/8/groupmod	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Delete Group	delete_group	groupdel	core	https://linux.die.net/man/8/groupdel	[x]	[x]	[x]	[x]	[x]	[x]	[x]
User
Get User Id	get_uid	id -u	core	https://linux.die.net/man/1/id	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get User	get_user	id	core	https://linux.die.net/man/1/id	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Create User	create_user	useradd	core	https://linux.die.net/man/8/useradd	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Update User	update_user	usermod	core	https://linux.die.net/man/8/usermod	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Delete User	delete_user	userdel	core	https://linux.die.net/man/8/userdel	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Path
List files and directories	ls	ls	core	https://linux.die.net/man/1/ls	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get Current Dir	pwd	pwd	core	https://linux.die.net/man/1/pwd	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get Current User	whoami	whoami	core	https://linux.die.net/man/1/whoami	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get Full Path of Shell Command	which	which	core	https://linux.die.net/man/1/which	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Real Path	realpath	realpath	core	https://linux.die.net/man/1/realpath	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Read link	readlink	readlink	core	https://linux.die.net/man/1/readlink	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Change Dir	cd	cd	core		[x]	[x]	[x]	[x]	[x]	[x]	[x]
File
"Find file, dir, special file device"	find	find	core	https://linux.die.net/man/1/find	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Stat file info	stat	stat	core	https://linux.die.net/man/1/stat	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Change Permission of file / folder	chmod	chmod	core	https://linux.die.net/man/1/chmod	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Change Ownership of file / folder	chown	chown	core	https://linux.die.net/man/1/chown	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Hard Link File	ln	ln	core	https://linux.die.net/man/1/ln	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Soft Link File / Dir	ln_s	ln	core	https://linux.die.net/man/1/ln	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Create Directory	mkdir	mkdir	core	https://linux.die.net/man/1/mkdir	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Remove file / directory	rm	rm	core	https://linux.die.net/man/1/rm	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Remove Directory	rmdir	rm	core	https://linux.die.net/man/1/rm	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Touch File	touch	touch	core	https://linux.die.net/man/1/touch	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Copy file / directory	cp	cp	core	https://linux.die.net/man/1/cp	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Move file / directory	mv	mv	core	https://linux.die.net/man/1/mv	[x]	[x]	[x]	[x]	[x]	[x]	[x]
"Get file line, word, and char count"	wc	wc	core	https://linux.die.net/man/1/wc	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Stream
Get content from beginning of file	head	head	core	https://linux.die.net/man/1/head	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get content from end of file	tail	tail	core	https://linux.die.net/man/1/tail	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Read a chunk from a file by lines	reach_file_chunk	tail and head	core		[x]	[x]	[x]	[x]	[x]	[x]	[x]
Echo to stdout or to file	echo	echo	core	https://linux.die.net/man/1/echo	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get all content from a file	cat	cat	core	https://linux.die.net/man/1/cat	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Sed	sed	sed	core	https://linux.die.net/man/1/sed	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Archive
Tar Files	tar	tar	core	https://linux.die.net/man/1/tar	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Network
Manage network devices	ip	ip	core	https://linux.die.net/man/8/ip	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Get Socket Details	ss	ss	core	https://linux.die.net/man/8/ss	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Transfer
Upload to remote server	upload	scp	core	https://linux.die.net/man/1/scp	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Download from remote server	download	scp	core	https://linux.die.net/man/1/scp	[x]	[x]	[x]	[x]	[x]	[x]	[x]
Wget	wget	wget	core	https://linux.die.net/man/1/wget	[x]	[x]	[x]	[x]	[x]	[x]	[x]

Development

After checking out the repo, run bin/setup to install dependencies.

To test kanrisuru across various linux distros, update your local /etc/hosts file to create an alias to the local virtual machine with that distro type. You can also set the host alias to the localhost machine.

To select which hosts to run rspec across, prepend the command line or export the variable while running rspec.

HOSTS=ubuntu,debian,centos rspec

This will run tests on the ubuntu, debian and centos instances.

Then, run rake spec to run the tests. You can also run bin/console for an interactive prompt that will allow you to experiment.

To install this gem onto your local machine, run bundle exec rake install. To release a new version, update the version number in version.rb, and then run bundle exec rake release, which will create a git tag for the version, push git commits and tags, and push the .gem file to rubygems.org.

Contributing

Bug reports and pull requests are welcome on GitHub at https://github.com/avamia/kanrisuru. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the code of conduct.

License

The gem is available as open source under the terms of the MIT License.

Code of Conduct

Everyone interacting in the Kanrisuru project's codebases, issue trackers, chat rooms and mailing lists is expected to follow the code of conduct.