├── .gitignore ├── .travis.yml ├── CODE_OF_CONDUCT.md ├── Gemfile ├── LICENSE ├── README.md ├── Rakefile ├── Vagrantfile ├── bin ├── console └── setup ├── examples ├── chroot.haco ├── cpu.haco └── drop_cap_sys_time.haco ├── exe └── haconiwa ├── haconiwa.gemspec ├── lib ├── haconiwa.rb └── haconiwa │ ├── base.rb │ ├── capabilities.rb │ ├── cgroup.rb │ ├── cli.rb │ ├── filesystem.rb │ ├── mount_point.rb │ ├── namespace.rb │ ├── runners.rb │ ├── runners │ └── linux.rb │ ├── small_cgroup.rb │ ├── small_libcap.rb │ └── version.rb └── test ├── config.rb └── haconiwa └── test_base.rb /.gitignore: -------------------------------------------------------------------------------- 1 | *.gem 2 | *.rbc 3 | /.config 4 | /coverage/ 5 | /InstalledFiles 6 | /pkg/ 7 | /spec/reports/ 8 | /spec/examples.txt 9 | /test/tmp/ 10 | /test/version_tmp/ 11 | /tmp/ 12 | 13 | ## Specific to RubyMotion: 14 | .dat* 15 | .repl_history 16 | build/ 17 | 18 | ## Documentation cache and generated files: 19 | /.yardoc/ 20 | /_yardoc/ 21 | /doc/ 22 | /rdoc/ 23 | 24 | ## Environment normalization: 25 | /.bundle/ 26 | /vendor/bundle 27 | /lib/bundler/man/ 28 | 29 | # for a library or gem, you might want to ignore these files since the code is 30 | # intended to run in multiple environments; otherwise, check them in: 31 | Gemfile.lock 32 | .ruby-version 33 | .ruby-gemset 34 | 35 | # unless supporting rvm < 1.11.0 or doing something fancy, ignore this: 36 | .rvmrc 37 | 38 | /.vagrant -------------------------------------------------------------------------------- /.travis.yml: -------------------------------------------------------------------------------- 1 | language: ruby 2 | 3 | rvm: 4 | #- 2.0.0 5 | #- 2.1.10 6 | - 2.2.5 7 | - 2.3.1 8 | 9 | install: bundle install --path vendor/bundle 10 | 11 | script: 12 | - bundle exec rake test 13 | - find lib -name '*.rb' | xargs -i ruby -wc {} 14 | 15 | notifications: 16 | slack: 17 | secure: 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 18 | -------------------------------------------------------------------------------- /CODE_OF_CONDUCT.md: -------------------------------------------------------------------------------- 1 | # Contributor Code of Conduct 2 | 3 | As contributors and maintainers of this project, and in the interest of 4 | fostering an open and welcoming community, we pledge to respect all people who 5 | contribute through reporting issues, posting feature requests, updating 6 | documentation, submitting pull requests or patches, and other activities. 7 | 8 | We are committed to making participation in this project a harassment-free 9 | experience for everyone, regardless of level of experience, gender, gender 10 | identity and expression, sexual orientation, disability, personal appearance, 11 | body size, race, ethnicity, age, religion, or nationality. 12 | 13 | Examples of unacceptable behavior by participants include: 14 | 15 | * The use of sexualized language or imagery 16 | * Personal attacks 17 | * Trolling or insulting/derogatory comments 18 | * Public or private harassment 19 | * Publishing other's private information, such as physical or electronic 20 | addresses, without explicit permission 21 | * Other unethical or unprofessional conduct 22 | 23 | Project maintainers have the right and responsibility to remove, edit, or 24 | reject comments, commits, code, wiki edits, issues, and other contributions 25 | that are not aligned to this Code of Conduct, or to ban temporarily or 26 | permanently any contributor for other behaviors that they deem inappropriate, 27 | threatening, offensive, or harmful. 28 | 29 | By adopting this Code of Conduct, project maintainers commit themselves to 30 | fairly and consistently applying these principles to every aspect of managing 31 | this project. Project maintainers who do not follow or enforce the Code of 32 | Conduct may be permanently removed from the project team. 33 | 34 | This code of conduct applies both within project spaces and in public spaces 35 | when an individual is representing the project or its community. 36 | 37 | Instances of abusive, harassing, or otherwise unacceptable behavior may be 38 | reported by contacting a project maintainer at udzura@pepabo.com. All 39 | complaints will be reviewed and investigated and will result in a response that 40 | is deemed necessary and appropriate to the circumstances. Maintainers are 41 | obligated to maintain confidentiality with regard to the reporter of an 42 | incident. 43 | 44 | This Code of Conduct is adapted from the [Contributor Covenant][homepage], 45 | version 1.3.0, available at 46 | [http://contributor-covenant.org/version/1/3/0/][version] 47 | 48 | [homepage]: http://contributor-covenant.org 49 | [version]: http://contributor-covenant.org/version/1/3/0/ 50 | -------------------------------------------------------------------------------- /Gemfile: -------------------------------------------------------------------------------- 1 | source 'https://rubygems.org' 2 | 3 | gemspec 4 | -------------------------------------------------------------------------------- /LICENSE: -------------------------------------------------------------------------------- 1 | GNU GENERAL PUBLIC LICENSE 2 | Version 3, 29 June 2007 3 | 4 | Copyright (C) 2007 Free Software Foundation, Inc. 5 | Everyone is permitted to copy and distribute verbatim copies 6 | of this license document, but changing it is not allowed. 7 | 8 | Preamble 9 | 10 | The GNU General Public License is a free, copyleft license for 11 | software and other kinds of works. 12 | 13 | The licenses for most software and other practical works are designed 14 | to take away your freedom to share and change the works. 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It is safest 630 | to attach them to the start of each source file to most effectively 631 | state the exclusion of warranty; and each file should have at least 632 | the "copyright" line and a pointer to where the full notice is found. 633 | 634 | {one line to give the program's name and a brief idea of what it does.} 635 | Copyright (C) {year} {name of author} 636 | 637 | This program is free software: you can redistribute it and/or modify 638 | it under the terms of the GNU General Public License as published by 639 | the Free Software Foundation, either version 3 of the License, or 640 | (at your option) any later version. 641 | 642 | This program is distributed in the hope that it will be useful, 643 | but WITHOUT ANY WARRANTY; without even the implied warranty of 644 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 645 | GNU General Public License for more details. 646 | 647 | You should have received a copy of the GNU General Public License 648 | along with this program. If not, see . 649 | 650 | Also add information on how to contact you by electronic and paper mail. 651 | 652 | If the program does terminal interaction, make it output a short 653 | notice like this when it starts in an interactive mode: 654 | 655 | {project} Copyright (C) {year} {fullname} 656 | This program comes with ABSOLUTELY NO WARRANTY; for details type `show w'. 657 | This is free software, and you are welcome to redistribute it 658 | under certain conditions; type `show c' for details. 659 | 660 | The hypothetical commands `show w' and `show c' should show the appropriate 661 | parts of the General Public License. Of course, your program's commands 662 | might be different; for a GUI interface, you would use an "about box". 663 | 664 | You should also get your employer (if you work as a programmer) or school, 665 | if any, to sign a "copyright disclaimer" for the program, if necessary. 666 | For more information on this, and how to apply and follow the GNU GPL, see 667 | . 668 | 669 | The GNU General Public License does not permit incorporating your program 670 | into proprietary programs. If your program is a subroutine library, you 671 | may consider it more useful to permit linking proprietary applications with 672 | the library. If this is what you want to do, use the GNU Lesser General 673 | Public License instead of this License. But first, please read 674 | . 675 | -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | # Haconiwa 2 | 3 | [![Build Status](https://travis-ci.org/haconiwa/haconiwa-mri.svg?branch=master)](https://travis-ci.org/haconiwa/haconiwa-mri) [![Gem Version](https://badge.fury.io/rb/haconiwa.svg)](https://badge.fury.io/rb/haconiwa) 4 | 5 | Ruby on Container / helper tools with DSL for your handmade linux containers 6 | 7 | ## Installation 8 | 9 | This gem only works on Linux systems, as using cgroup, Linux namespace and Linux capabilities. 10 | 11 | Some packages/dylibs/tools are used internally, so please install below before gem setup: 12 | 13 | * `libcap` (`libcap.so.2` is used via FFI) 14 | * `nsenter` (e.g. `yum install util-linux` or such one) 15 | 16 | Then, install it yourself globally(recommended using rbenv) as: 17 | 18 | ```console 19 | $ gem install haconiwa 20 | $ rbenv rehash # if needed 21 | ``` 22 | 23 | Or add the line to your application's Gemfile: 24 | 25 | ```ruby 26 | gem 'haconiwa' 27 | ``` 28 | 29 | And then execute `bundle`. 30 | 31 | ## Usage 32 | 33 | Create the file `example001.haco`: 34 | 35 | ```ruby 36 | Haconiwa::Base.define do |config| 37 | config.name = "new-haconiwa001" # to be hostname 38 | 39 | config.cgroup["cpu.shares"] = 2048 40 | config.cgroup["memory.limit_in_bytes"] = "256M" 41 | config.cgroup["pid.max"] = 1024 42 | 43 | config.add_mount_point "/var/another/root/etc", to: "/var/your_rootfs/etc", readonly: true 44 | config.add_mount_point "/var/another/root/home", to: "/var/your_rootfs/home" 45 | config.mount_independent_procfs 46 | config.chroot_to "/var/your_rootfs" 47 | 48 | config.namespace.unshare "ipc" 49 | config.namespace.unshare "uts" 50 | config.namespace.unshare "mount" 51 | config.namespace.unshare "pid" 52 | 53 | config.capabilities.allow :all 54 | config.capabilities.drop "CAP_SYS_TIME" 55 | end 56 | ``` 57 | 58 | Then use `haconiwa` binary installed with thie gem. 59 | 60 | ```console 61 | $ haconiwa run example001.haco 62 | ``` 63 | 64 | When you want to attach existing container: 65 | 66 | ```console 67 | $ haconiwa attach example001.haco 68 | ``` 69 | 70 | Note: `attach` subcommand allows to set PID(`--target`) or container name(`--name`) for dynamic configuration. 71 | And `attach` is not concerned with capabilities which is granted to container. So you can drop or allow specific caps with `--drop/--allow`. 72 | 73 | ### DSL spec 74 | 75 | * `config.cgroup` - Assign cgroup parameters via `[]=` 76 | * `config.namespace.unshare` - Unshare the namespaces like `"mount"`, `"ipc"` or `"pid"` 77 | * `config.capabilities.allow` - Allow capabilities on container root. Setting parameters other than `:all` should make this acts as whitelist 78 | * `config.capabilities.drop` - Drop capabilities of container root. Default to act as blacklist 79 | * `config.add_mount_point` - Add the mount point odf container 80 | * `config.mount_independent_procfs` - Mount the independent /proc directory in the container. Useful if `"pid"` is unshared 81 | * `config.chroot_to` - The new chroot root 82 | 83 | You can pick your own parameters for your use case of container. 84 | e.g. just using `mount` namespace unshared, container with common filesystem, limit the cgroups for big resource job and so on. 85 | 86 | Please look into `example` directory. 87 | 88 | ### Library use case 89 | 90 | ```ruby 91 | require 'haconiwa' 92 | base = Haconiwa::Base.define do |config| 93 | config.name = "new-haconiwa001" # to be hostname 94 | ... 95 | end 96 | 97 | # Run the container 98 | base.run("/bin/bash") 99 | 100 | # Or attach existing one 101 | base.attach("/bin/bash") 102 | ``` 103 | 104 | ## Development 105 | 106 | After checking out the repo, run `bin/setup` to install dependencies. You can also run `bin/console` for an interactive prompt that will allow you to experiment. 107 | 108 | 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](https://rubygems.org). 109 | 110 | ## Contributing 111 | 112 | Bug reports and pull requests are welcome on GitHub at https://github.com/udzura/haconiwa. This project is intended to be a safe, welcoming space for collaboration, and contributors are expected to adhere to the [Contributor Covenant](http://contributor-covenant.org) code of conduct. 113 | 114 | ## TODOs 115 | 116 | * [ ] netns attachment 117 | * [ ] more utilities such as `ps` 118 | * [ ] better daemon handling 119 | 120 | ## License 121 | 122 | This gem is created under [GNU General Public License Version 3](./LICENSE). 123 | 124 | -------------------------------------------------------------------------------- /Rakefile: -------------------------------------------------------------------------------- 1 | require "bundler/gem_tasks" 2 | require "rake/testtask" 3 | 4 | desc "Run #{File.basename(File.dirname(__FILE__))}'s test suite" 5 | Rake::TestTask.new do |t| 6 | # To run test for only one file (or file path pattern) 7 | # $ bundle exec rake test TEST=test/test_specified_path.rb 8 | t.libs.concat ["test"] 9 | t.test_files = Dir["test/**/test_*.rb"] 10 | t.verbose = true 11 | t.ruby_opts = ["-r config"] 12 | end 13 | task :default => :test 14 | -------------------------------------------------------------------------------- /Vagrantfile: -------------------------------------------------------------------------------- 1 | # -*- mode: ruby -*- 2 | # vi: set ft=ruby : 3 | 4 | Vagrant.configure(2) do |config| 5 | config.vm.box = "puppetlabs/centos-7.0-64-puppet" 6 | 7 | config.vm.network "forwarded_port", guest: 80, host: 38080 8 | config.vm.network "private_network", ip: "192.168.98.10" 9 | # config.vm.synced_folder "../data", "/vagrant_data" 10 | 11 | config.vm.provider "virtualbox" do |vbox| 12 | # Display the VirtualBox GUI when booting the machine 13 | vbox.gui = true 14 | 15 | # Customize the amount of memory on the VM: 16 | vbox.memory = "2048" 17 | vbox.cpus = 4 18 | 19 | vbox.customize ["modifyvm", :id, "--natdnsproxy1", "off"] 20 | vbox.customize ["modifyvm", :id, "--natdnshostresolver1", "off"] 21 | vbox.customize ["modifyvm", :id, "--nic2", "intnet"] 22 | vbox.customize ["modifyvm", :id, "--intnet2", "internal_network"] 23 | end 24 | 25 | config.vm.provision "shell", inline: (<<-SHELL).gsub(/^ +/m, "") 26 | set -x 27 | if ! test -f /usr/local/rbenv/version; then 28 | sudo bash -l << EOS 29 | yum -y install epel-release 30 | yum -y update 31 | yum -y install libcgroup libcgroup-devel libcap-ng libcap-ng-devel 32 | yum -y install gcc-c++ git glibc-headers libffi-devel libxml2 libxml2-devel \ 33 | libxslt libxslt-devel libyaml-devel make openssl-devel \ 34 | readline readline-devel sqlite-devel zlib zlib-devel 35 | git clone https://github.com/rbenv/rbenv.git /usr/local/rbenv 36 | ( cd /usr/local/rbenv && sudo src/configure && sudo make -C src ) 37 | echo 'export PATH="/usr/local/rbenv/bin:$PATH"' | tee -a /etc/profile.d/rbenv.sh 38 | echo 'eval "$(rbenv init -)"' | tee -a /etc/profile.d/rbenv.sh 39 | git clone https://github.com/rbenv/ruby-build.git /usr/local/rbenv/plugins/ruby-build 40 | . /etc/profile.d/rbenv.sh 41 | rbenv install 2.2.5 42 | rbenv global 2.2.5 43 | rbenv rehash 44 | 45 | yum -y install lxc lxc-templates lxc-doc lxc-libs rsync debootstrap 46 | 47 | mkdir /var/haconiwa 48 | mkdir /var/haconiwa/root 49 | mkdir /var/haconiwa/rootfs 50 | mkdir /var/haconiwa/bundle 51 | mkdir /var/haconiwa/user_homes 52 | EOS 53 | fi 54 | SHELL 55 | end 56 | -------------------------------------------------------------------------------- /bin/console: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env ruby 2 | 3 | require "bundler/setup" 4 | require "haconiwa" 5 | 6 | # You can add fixtures and/or initialization code here to make experimenting 7 | # with your gem easier. You can also use a different console, if you like. 8 | 9 | # (If you use this, don't forget to add pry to your Gemfile!) 10 | require "pry" 11 | Pry.start 12 | -------------------------------------------------------------------------------- /bin/setup: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env bash 2 | set -euo pipefail 3 | IFS=$'\n\t' 4 | set -vx 5 | 6 | bundle install 7 | 8 | # Do any other automated setup that you need to do here 9 | -------------------------------------------------------------------------------- /examples/chroot.haco: -------------------------------------------------------------------------------- 1 | # -*- mode: ruby -*- 2 | Haconiwa.define do |config| 3 | config.name = "chroot001" # to be hostname 4 | config.init_command = "/bin/sh" # to be first process 5 | 6 | root = Pathname.new("/var/haconiwa/root") 7 | config.add_mount_point "/var/haconiwa/rootfs", to: root, readonly: true 8 | config.add_mount_point "/lib64", to: root.join("lib64"), readonly: true 9 | config.add_mount_point "/usr/bin", to: root.join("usr/bin"), readonly: true 10 | config.add_mount_point "tmpfs", to: root.join("tmp"), fs: "tmpfs" 11 | config.add_mount_point "/var/haconiwa/user_homes/hakoniwa-test001/home/hakoniwa", to: root.join("home/hakoniwa") 12 | config.mount_independent_procfs 13 | config.chroot_to root 14 | 15 | config.namespace.unshare "mount" 16 | config.namespace.unshare "ipc" 17 | config.namespace.unshare "uts" 18 | config.namespace.unshare "pid" 19 | end 20 | -------------------------------------------------------------------------------- /examples/cpu.haco: -------------------------------------------------------------------------------- 1 | # -*- mode: ruby -*- 2 | haconiwa = Haconiwa::Base.define do |config| 3 | config.name = "cpu-quota001" # to be hostname 4 | 5 | root = Pathname.new("/var/haconiwa/root") 6 | config.add_mount_point "/var/haconiwa/rootfs", to: root, readonly: true 7 | config.add_mount_point "/lib64", to: root.join("lib64"), readonly: true 8 | config.add_mount_point "/usr/bin", to: root.join("usr/bin"), readonly: true 9 | config.add_mount_point "/usr/local/rbenv", to: root.join("usr/local/rbenv") 10 | config.add_mount_point "tmpfs", to: root.join("tmp"), fs: "tmpfs" 11 | config.mount_independent_procfs 12 | config.chroot_to root 13 | 14 | config.namespace.unshare "mount" 15 | config.namespace.unshare "ipc" 16 | config.namespace.unshare "uts" 17 | config.namespace.unshare "pid" 18 | 19 | config.cgroup["cpu.cfs_period_us"] = 100000 20 | config.cgroup["cpu.cfs_quota_us"] = 30000 21 | end 22 | -------------------------------------------------------------------------------- /examples/drop_cap_sys_time.haco: -------------------------------------------------------------------------------- 1 | # -*- mode: ruby -*- 2 | haconiwa = Haconiwa::Base.define do |config| 3 | config.name = "drop-time001" # to be hostname 4 | 5 | root = Pathname.new("/var/haconiwa/root") 6 | config.add_mount_point "/var/haconiwa/rootfs", to: root, readonly: true 7 | config.add_mount_point "/lib64", to: root.join("lib64"), readonly: true 8 | config.add_mount_point "/sbin", to: root.join("sbin"), readonly: true 9 | config.add_mount_point "/usr/bin", to: root.join("usr/bin"), readonly: true 10 | config.add_mount_point "/usr/local/rbenv", to: root.join("usr/local/rbenv") 11 | config.add_mount_point "tmpfs", to: root.join("tmp"), fs: "tmpfs" 12 | config.mount_independent_procfs 13 | config.chroot_to root 14 | 15 | config.namespace.unshare "mount" 16 | config.namespace.unshare "ipc" 17 | config.namespace.unshare "uts" 18 | config.namespace.unshare "pid" 19 | 20 | config.capabilities.allow :all 21 | config.capabilities.drop "cap_sys_time" 22 | 23 | # or use white list: 24 | # config.capabilities.allow "cap_sys_time" 25 | end 26 | -------------------------------------------------------------------------------- /exe/haconiwa: -------------------------------------------------------------------------------- 1 | #!/usr/bin/env ruby 2 | require 'haconiwa' 3 | require 'haconiwa/cli' 4 | 5 | subcommand = ARGV[0] 6 | case subcommand 7 | when "version" 8 | puts Haconiwa::VERSION 9 | when "run" 10 | Haconiwa::Cli.run(ARGV[1..-1]) 11 | when "attach" 12 | Haconiwa::Cli.attach(ARGV[1..-1]) 13 | else 14 | STDERR.puts <<-EOH 15 | Usage of #{$0}: 16 | run - Run the container with init command 17 | Example: haconiwa run path/to/definition.haco -- /bin/your command 18 | attach - Attach to the existing container with command 19 | Example: haconiwa attach path/to/definition.haco -- /bin/your command 20 | 21 | Version: 22 | #{Haconiwa::VERSION} 23 | EOH 24 | end 25 | -------------------------------------------------------------------------------- /haconiwa.gemspec: -------------------------------------------------------------------------------- 1 | # coding: utf-8 2 | lib = File.expand_path('../lib', __FILE__) 3 | $LOAD_PATH.unshift(lib) unless $LOAD_PATH.include?(lib) 4 | require 'haconiwa/version' 5 | 6 | Gem::Specification.new do |spec| 7 | spec.name = "haconiwa" 8 | spec.version = Haconiwa::VERSION 9 | spec.authors = ["Uchio KONDO"] 10 | spec.email = ["udzura@udzura.jp"] 11 | 12 | spec.summary = %q{Ruby on Container / helper tools with DSL for your handmade linux containers} 13 | spec.description = %q{Ruby on Container / helper tools with DSL for your handmade linux containers.} 14 | spec.homepage = "https://github.com/udzura/haconiwa" 15 | spec.license = "MIT" 16 | 17 | spec.files = `git ls-files -z`.split("\x0").reject { |f| f.match(%r{^(test|spec|features)/}) } 18 | spec.bindir = "exe" 19 | spec.executables = spec.files.grep(%r{^exe/}) { |f| File.basename(f) } 20 | spec.require_paths = ["lib"] 21 | 22 | spec.add_dependency "ffi" 23 | 24 | spec.add_development_dependency "bundler", "~> 1.11" 25 | spec.add_development_dependency "rake", "~> 10.0" 26 | spec.add_development_dependency "test-unit", ">= 3" 27 | spec.add_development_dependency "test-unit-rr" 28 | spec.add_development_dependency "power_assert" 29 | spec.add_development_dependency "pry" 30 | end 31 | -------------------------------------------------------------------------------- /lib/haconiwa.rb: -------------------------------------------------------------------------------- 1 | require "haconiwa/version" 2 | 3 | module Haconiwa 4 | end 5 | 6 | require "haconiwa/base" 7 | -------------------------------------------------------------------------------- /lib/haconiwa/base.rb: -------------------------------------------------------------------------------- 1 | require "haconiwa/filesystem" 2 | require "haconiwa/mount_point" 3 | require "haconiwa/cgroup" 4 | require "haconiwa/namespace" 5 | require "haconiwa/capabilities" 6 | require "haconiwa/runners" 7 | 8 | module Haconiwa 9 | class Base 10 | attr_accessor :name, 11 | :init_command, 12 | :container_pid_file, 13 | :pid, 14 | :filesystem, 15 | :cgroup, 16 | :namespace, 17 | :capabilities, 18 | :attached_capabilities 19 | 20 | def self.define(&b) 21 | new.tap(&b) 22 | end 23 | 24 | def initialize 25 | @filesystem = Filesystem.new 26 | @cgroup = CGroup.new 27 | @namespace = Namespace.new 28 | @capabilities = Capabilities.new 29 | @attached_capabilities = nil 30 | @name = "haconiwa-#{Time.now.to_i}" 31 | @init_command = "/bin/bash" # FIXME: maybe /sbin/init is better 32 | @container_pid_file = nil 33 | @pid = nil 34 | end 35 | 36 | # aliases 37 | def chroot_to(dest) 38 | self.filesystem.chroot = dest 39 | end 40 | 41 | def add_mount_point(point, options) 42 | self.namespace.unshare "mount" 43 | self.filesystem.mount_points << MountPoint.new(point, options) 44 | end 45 | 46 | def mount_independent_procfs 47 | self.namespace.unshare "mount" 48 | self.filesystem.mount_independent_procfs = true 49 | end 50 | 51 | def start(*init_command) 52 | self.container_pid_file ||= default_container_pid_file 53 | Runners::Linux.run(self, init_command) 54 | end 55 | alias run start 56 | 57 | def attach(*run_command) 58 | self.container_pid_file ||= default_container_pid_file 59 | Runners::Linux.attach(self, run_command) 60 | end 61 | 62 | def default_container_pid_file 63 | "/var/run/haconiwa-#{@name}.pid" 64 | end 65 | end 66 | 67 | def self.define(&b) 68 | Base.define(&b) 69 | end 70 | 71 | module Utils 72 | # $ ausyscall --dump | grep hostname 73 | # 170 sethostname 74 | 75 | def sethostname(name) 76 | Kernel.syscall(170, name, name.length) 77 | end 78 | end 79 | 80 | Base.extend Utils 81 | end 82 | -------------------------------------------------------------------------------- /lib/haconiwa/capabilities.rb: -------------------------------------------------------------------------------- 1 | require 'haconiwa/small_libcap' 2 | 3 | module Haconiwa 4 | class Capabilities 5 | def initialize 6 | @blacklist = [] 7 | @whitelist = [] 8 | end 9 | 10 | def allow(*keys) 11 | if keys.first == :all 12 | @whitelist.clear 13 | else 14 | @whitelist.concat(keys) 15 | end 16 | end 17 | 18 | def drop(*keys) 19 | @blacklist.concat(keys) 20 | end 21 | 22 | def apply! 23 | if acts_as_whitelist? 24 | SmallLibcap.apply_cap_whitelist(list: @whitelist.uniq) 25 | else 26 | @blacklist.uniq.each do |n| 27 | SmallLibcap.drop_cap_by_name(n) 28 | end 29 | end 30 | end 31 | 32 | private 33 | def acts_as_whitelist? 34 | ! @whitelist.empty? 35 | end 36 | end 37 | end 38 | -------------------------------------------------------------------------------- /lib/haconiwa/cgroup.rb: -------------------------------------------------------------------------------- 1 | require 'haconiwa/small_cgroup' 2 | 3 | module Haconiwa 4 | class CGroup 5 | def initialize 6 | @groups = {} 7 | end 8 | attr_reader :groups 9 | 10 | def [](key) 11 | @groups[key] 12 | end 13 | 14 | def []=(key, value) 15 | @groups[key] = value 16 | end 17 | 18 | def to_dirs 19 | groups.keys.map{|k| k.split('.').first }.uniq 20 | end 21 | alias dirs to_dirs 22 | 23 | def register_all!(to: nil) 24 | cg = SmallCgroup.new(name: to) 25 | groups.each do |k, v| 26 | cg.register k, v 27 | end 28 | end 29 | 30 | def attach(to: nil) 31 | cg = SmallCgroup.new(name: to) 32 | dirs.each do |dir| 33 | cg.attach(dir) 34 | end 35 | end 36 | end 37 | end 38 | -------------------------------------------------------------------------------- /lib/haconiwa/cli.rb: -------------------------------------------------------------------------------- 1 | module Haconiwa 2 | module Cli 3 | def self.run(args) 4 | base, init = get_script_and_eval(args) 5 | base.run(*init) 6 | end 7 | 8 | def self.attach(args) 9 | require 'optparse' 10 | opt = OptionParser.new 11 | pid = nil 12 | name = nil 13 | allow = nil 14 | drop = nil 15 | 16 | opt.program_name = "haconiwa attach" 17 | opt.on('-t', '--target PID', "Container's PID to attatch. If not set, use pid file of definition") {|v| pid = v } 18 | opt.on('-n', '--name CONTAINER_NAME', "Container's name. Set if the name is dynamically defined") {|v| name = v } 19 | opt.on('--allow CAPS[,CAPS...]', "Capabilities to allow attached process. Independent container's own caps") {|v| allow = v.split(',') } 20 | opt.on('--drop CAPS[,CAPS...]', "Capabilities to drop from attached process. Independent container's own caps") {|v| drop = v.split(',') } 21 | args = opt.parse(args) 22 | 23 | base, exe = get_script_and_eval(args) 24 | base.pid = pid if pid 25 | base.name = name if name 26 | if allow || drop 27 | base.attached_capabilities = Capabilities.new 28 | base.attached_capabilities.allow(*allow) if allow 29 | base.attached_capabilities.drop(*drop) if drop 30 | end 31 | 32 | base.attach(*exe) 33 | end 34 | 35 | private 36 | 37 | def self.get_script_and_eval(args) 38 | require 'pathname' 39 | script = File.read(args[0]) 40 | exe = args[1..-1] 41 | if exe.first == "--" 42 | exe.shift 43 | end 44 | 45 | return [eval(script), exe] 46 | end 47 | end 48 | end 49 | -------------------------------------------------------------------------------- /lib/haconiwa/filesystem.rb: -------------------------------------------------------------------------------- 1 | module Haconiwa 2 | class Filesystem 3 | def initialize 4 | @mount_points = [] 5 | @mount_independent_procfs = false 6 | end 7 | attr_accessor :chroot, :mount_points, 8 | :mount_independent_procfs 9 | 10 | def mount_all! 11 | Dir.chdir "/" 12 | unless mount_points.empty? 13 | system "mount --make-private /" 14 | 15 | mount_points.each do |mount| 16 | mount.apply! 17 | end 18 | end 19 | end 20 | end 21 | end 22 | -------------------------------------------------------------------------------- /lib/haconiwa/mount_point.rb: -------------------------------------------------------------------------------- 1 | module Haconiwa 2 | class MountPoint 3 | def initialize(point, options) 4 | @src = point 5 | @dest = options.delete(:to) 6 | @readonly = options.delete(:readonly) 7 | @fs = options.delete(:fs) 8 | @options = options 9 | end 10 | 11 | def to_command 12 | if @fs 13 | "mount -t #{@fs} #{@src} #{@dest}" 14 | else 15 | "mount --bind #{@src} #{@dest}" 16 | end 17 | end 18 | 19 | def apply! 20 | STDERR.puts to_command 21 | system to_command 22 | if @readonly 23 | STDERR.puts "mount --bind -o remount,ro #{@dest}" 24 | system "mount --bind -o remount,ro #{@dest}" 25 | end 26 | end 27 | end 28 | end 29 | -------------------------------------------------------------------------------- /lib/haconiwa/namespace.rb: -------------------------------------------------------------------------------- 1 | module Haconiwa 2 | class Namespace 3 | UNSHARE = 272 4 | SETNS = 308 5 | 6 | # from linux/sched.h 7 | 8 | CLONE_FS = 0x00000200 9 | CLONE_FILES = 0x00000400 10 | CLONE_NEWNS = 0x00020000 11 | CLONE_SYSVSEM = 0x00040000 12 | CLONE_NEWCGROUP = 0x02000000 13 | CLONE_NEWUTS = 0x04000000 14 | CLONE_NEWIPC = 0x08000000 15 | CLONE_NEWUSER = 0x10000000 16 | CLONE_NEWPID = 0x20000000 17 | CLONE_NEWNET = 0x40000000 18 | 19 | NS_MAPPINGS = { 20 | "cgroup" => CLONE_NEWCGROUP, 21 | "ipc" => CLONE_NEWIPC, 22 | "net" => CLONE_NEWNET, 23 | "mount" => CLONE_NEWNS, 24 | "pid" => CLONE_NEWPID, 25 | "user" => CLONE_NEWUSER, 26 | "uts" => CLONE_NEWUTS, 27 | } 28 | 29 | FLAG_TO_PARAM = { 30 | CLONE_NEWCGROUP => "cgroup", 31 | CLONE_NEWIPC => "ipc", 32 | CLONE_NEWNET => "net", 33 | CLONE_NEWNS => "mount", 34 | CLONE_NEWPID => "pid", 35 | CLONE_NEWUSER => "user", 36 | CLONE_NEWUTS => "uts", 37 | } 38 | 39 | def initialize 40 | @use_ns = [] 41 | @netns_name = nil 42 | end 43 | 44 | def unshare(ns) 45 | flag = case ns 46 | when String, Symbol 47 | NS_MAPPINGS[ns.to_s] 48 | when Integer 49 | ns 50 | end 51 | if flag == CLONE_NEWPID 52 | @use_pid_ns = true 53 | else 54 | @use_ns << flag 55 | end 56 | end 57 | attr_reader :use_pid_ns 58 | 59 | def use_netns(name) 60 | @netns_name = name 61 | end 62 | 63 | def apply! 64 | flag = to_ns_flag 65 | STDERR.puts "unshare(2) flag: 0x%s" % flag.to_s(16) 66 | Kernel.syscall(UNSHARE, flag) 67 | end 68 | 69 | def enter(pid: nil, wrapper_path: nil) 70 | ns_params = use_ns_all.map{|f| "--#{FLAG_TO_PARAM[f]}" } 71 | exec "nsenter", 72 | "--target", "#{pid}", 73 | *ns_params, 74 | "--", wrapper_path.to_s 75 | end 76 | 77 | private 78 | 79 | def use_ns_all 80 | @use_ns.uniq + (@use_pid_ns ? [CLONE_NEWPID] : []) 81 | end 82 | 83 | def to_ns_flag 84 | @use_ns.inject(0x00000000) { |dst, flag| 85 | dst |= flag 86 | } 87 | end 88 | end 89 | end 90 | -------------------------------------------------------------------------------- /lib/haconiwa/runners.rb: -------------------------------------------------------------------------------- 1 | module Haconiwa 2 | module Runners 3 | end 4 | end 5 | 6 | require 'haconiwa/runners/linux' 7 | -------------------------------------------------------------------------------- /lib/haconiwa/runners/linux.rb: -------------------------------------------------------------------------------- 1 | require 'tempfile' 2 | require 'fileutils' 3 | require 'shellwords' 4 | require 'bundler' 5 | 6 | module Haconiwa::Runners 7 | # see http://d.hatena.ne.jp/hiboma/20120518/1337337393 8 | 9 | class Linux 10 | def self.run(base, init_command=[]) 11 | container = fork { 12 | if init_command.empty? 13 | init_command = Array(base.init_command) 14 | end 15 | 16 | base.namespace.apply! 17 | base.cgroup.register_all!(to: base.name) 18 | 19 | base.filesystem.mount_all! 20 | 21 | Dir.chroot base.filesystem.chroot 22 | Dir.chdir "/" 23 | 24 | wrapper = Tempfile.open("haconiwa-wrapper-#{$$}-#{Time.now.to_i}.sh") 25 | 26 | wrapper.puts "#!/bin/bash" 27 | wrapper.puts "/bin/bash -c '" 28 | if base.filesystem.mount_independent_procfs 29 | wrapper.puts "mount -t proc proc /proc;" 30 | end 31 | wrapper.puts "exec $@;" 32 | wrapper.puts "' -- \"$@\"" 33 | wrapper.close 34 | FileUtils.chmod 0700, wrapper.path 35 | 36 | Haconiwa::Base.sethostname(base.name) 37 | 38 | base.capabilities.apply! 39 | 40 | if base.namespace.use_pid_ns 41 | Bundler.with_clean_env { 42 | exec "unshare", "--pid", "--", wrapper.path, *init_command 43 | } 44 | else 45 | Bundler.with_clean_env { exec wrapper.path, *init_command } 46 | end 47 | } 48 | 49 | sleep 0.1 # The magic 50 | Haconiwa::SmallCgroup.register_at_exit(pid: container, name: base.name, dirs: base.cgroup.to_dirs) 51 | real_container_pid = if base.namespace.use_pid_ns 52 | find_by_ppid(container) 53 | else 54 | container 55 | end 56 | File.open(base.container_pid_file, "w") {|pid| pid.write real_container_pid } 57 | Signal.trap(:INT) { Process.kill :TERM, container } 58 | puts "New container: Name = #{base.name}, PID = #{real_container_pid}" 59 | 60 | res = Process.waitpid2 container 61 | if res[1].success? 62 | puts "Successfully exit container." 63 | else 64 | puts "Container exited with status code <#{res[1].to_i}>." 65 | end 66 | 67 | at_exit { FileUtils.rm_f base.container_pid_file } 68 | end 69 | 70 | def self.attach(base, run_command=[]) 71 | if run_command.empty? 72 | run_command << "/bin/bash" 73 | end 74 | 75 | wrapper = Tempfile.open("haconiwa-attacher-#{$$}-#{Time.now.to_i}.sh") 76 | 77 | wrapper.puts "#!/bin/bash" 78 | wrapper.puts "chroot #{base.filesystem.chroot} bash -c '" 79 | wrapper.puts "cd / ;" 80 | wrapper.puts Shellwords.shelljoin(["exec", *run_command]).gsub(/'/, %<'"'"'>) 81 | wrapper.puts "'" 82 | wrapper.close 83 | FileUtils.chmod 0700, wrapper.path 84 | 85 | runner = fork { 86 | base.pid ||= File.read(base.container_pid_file).to_i 87 | 88 | if base.attached_capabilities 89 | base.attached_capabilities.apply! 90 | end 91 | 92 | base.cgroup.attach(to: base.name) 93 | Bundler.with_clean_env { base.namespace.enter(pid: base.pid, wrapper_path: wrapper.path) } 94 | } 95 | 96 | puts "Attached to contanier: Runner PID = #{runner}" 97 | 98 | res = Process.waitpid2 runner 99 | if res[1].success? 100 | puts "Successfully exit." 101 | else 102 | puts "Attached process exited with status code <#{res[1].to_i}>." 103 | end 104 | end 105 | 106 | private 107 | def self.find_by_ppid(ppid) 108 | s = Dir.glob('/proc/*/stat') 109 | .find {|stat| 110 | next unless stat =~ /\d/ 111 | File.read(stat).split[3].to_i == ppid 112 | } 113 | if s 114 | s.scan(/\d+/).first.to_i 115 | else 116 | raise("Process that has ppid #{ppid} not found. Somthing is wrong.") 117 | end 118 | end 119 | end 120 | end 121 | -------------------------------------------------------------------------------- /lib/haconiwa/small_cgroup.rb: -------------------------------------------------------------------------------- 1 | require 'pathname' 2 | require 'fileutils' 3 | 4 | module Haconiwa 5 | class SmallCgroup 6 | class << self 7 | attr_accessor :fs_root 8 | 9 | def register_at_exit(pid: nil, name: nil, dirs: nil) 10 | at_exit do 11 | dirs.each do |dir| 12 | begin 13 | cleanup = fs_root.join(dir, name) 14 | FileUtils.rmdir(cleanup) 15 | rescue 16 | STDERR.puts "Failed to remove: #{cleanup}" 17 | end 18 | end 19 | end 20 | end 21 | end 22 | self.fs_root = Pathname.new("/sys/fs/cgroup") 23 | 24 | def initialize(name: "haconiwa-#{$$}", pid: $$) 25 | @name = name 26 | @pid = pid 27 | @active_dirs = [] 28 | end 29 | attr_reader :name, :pid 30 | 31 | def activate(dir) 32 | dirroot = root_of(dir) 33 | FileUtils.mkdir_p dirroot 34 | attach(dir) 35 | @active_dirs << dir 36 | end 37 | 38 | def attach(dir) 39 | dirroot = root_of(dir) 40 | append_write dirroot.join("tasks"), self.pid 41 | end 42 | 43 | def activated?(dir) 44 | @active_dirs.include? dir 45 | end 46 | 47 | def register(key, value) 48 | dir = key.split('.').first 49 | unless activated?(dir) 50 | activate(dir) 51 | end 52 | 53 | overwrite root_of(dir).join(key), value 54 | end 55 | 56 | private 57 | 58 | def root_of(dir) 59 | SmallCgroup.fs_root.join(dir, self.name) 60 | end 61 | 62 | def append_write(file, value) 63 | File.open(file, 'a') {|f| f.puts value } 64 | end 65 | 66 | def overwrite(file, value) 67 | File.open(file, 'w') {|f| f.puts value } 68 | end 69 | end 70 | end 71 | -------------------------------------------------------------------------------- /lib/haconiwa/small_libcap.rb: -------------------------------------------------------------------------------- 1 | require 'ffi' 2 | 3 | module Haconiwa 4 | class Cap_T < FFI::ManagedStruct 5 | layout :head, :pointer, 6 | :set, :pointer 7 | 8 | def self.release(ptr) 9 | SmallLibcap.cap_free ptr 10 | end 11 | end 12 | 13 | class SmallLibcap 14 | class CapError < StandardError; end 15 | 16 | extend FFI::Library 17 | ffi_lib "libcap.so.2" 18 | 19 | attach_function :cap_get_proc, [], Cap_T.ptr 20 | attach_function :cap_set_proc, [Cap_T.ptr], :int 21 | attach_function :cap_from_name, [:string, :pointer], :int 22 | attach_function :cap_drop_bound, [:int], :int 23 | attach_function :cap_get_bound, [:int], :int 24 | 25 | attach_function :cap_free, [:pointer], :int 26 | 27 | def self.cap_supported?(cap) 28 | cap_get_bound(cap) >= 0 29 | end 30 | 31 | def self._name2cap(name) 32 | ptr = FFI::MemoryPointer.new(:int) 33 | err = cap_from_name(name, ptr) 34 | if err < 0 35 | raise CapError, "Invalid or unsupported capability name: #{name}" 36 | end 37 | ptr.read_int 38 | end 39 | 40 | def self.drop_cap_by_name(name) 41 | err = cap_drop_bound(_name2cap(name)) 42 | if err < 0 43 | raise CapError, "Failed to drop capability name: #{name} from bounding set" 44 | end 45 | true 46 | end 47 | 48 | def self.apply_cap_whitelist(list: []) 49 | whitelist = list.map{|n| _name2cap(n) } 50 | 51 | loop.with_index(0) do |_, cap_value| 52 | return(true) unless cap_supported?(cap_value) 53 | next if whitelist.include?(cap_value) 54 | 55 | err = cap_drop_bound(cap_value) 56 | if err < 0 57 | raise CapError, "Failed to drop capability cap_value_t: #{cap_value} from bounding set" 58 | end 59 | end 60 | end 61 | end 62 | end 63 | -------------------------------------------------------------------------------- /lib/haconiwa/version.rb: -------------------------------------------------------------------------------- 1 | module Haconiwa 2 | VERSION = "0.2.1" 3 | end 4 | -------------------------------------------------------------------------------- /test/config.rb: -------------------------------------------------------------------------------- 1 | require 'test/unit' 2 | require 'test/unit/rr' 3 | require 'power_assert' 4 | require 'haconiwa' 5 | -------------------------------------------------------------------------------- /test/haconiwa/test_base.rb: -------------------------------------------------------------------------------- 1 | class TestBase < Test::Unit::TestCase 2 | def test_define 3 | haconiwa = Haconiwa::Base.define do |config| 4 | config.name = "new-haconiwa001" 5 | 6 | config.cgroup["cpu.shares"] = 2048 7 | config.cgroup["memory.limit_in_bytes"] = "256M" 8 | config.cgroup["pid.max"] = 1024 9 | 10 | config.chroot_to "/var/your_rootfs" 11 | config.add_mount_point "/var/another/root/etc", to: "/etc", readonly: true 12 | config.add_mount_point "/var/another/root/home", to: "/home" 13 | config.add_mount_point "proc", to: "/proc", fs: "proc" 14 | 15 | config.namespace.unshare "ipc" 16 | config.namespace.unshare "mount" 17 | config.namespace.unshare "pid" 18 | config.namespace.use_netns "foobar" 19 | 20 | config.capabilities.allow :all 21 | config.capabilities.drop "CAP_SYS_TIME" 22 | end 23 | 24 | assert { haconiwa.name == "new-haconiwa001" } 25 | end 26 | end 27 | --------------------------------------------------------------------------------