你可以在没有 ruby​​ 1.8 的情况下安装 puppet 吗？

我需要在 ubuntu 12.04 服务器上安装 puppet 3.2.0 或更高版本以及 ruby​​ 2.0.0-p247。

没有ruby 1.8就没有办法安装puppet吗？

我的大部分经验来自 CentOS，所以我可能会遗漏一些简单的 apt。

我的设置：

确保没有红宝石存在

root@gitlab:~# which ruby
root@gitlab:~# ruby --version
The program 'ruby' can be found in the following packages:
 * ruby1.8
 * ruby1.9.1
Try: apt-get install <selected package>

从官方 ppa 安装 puppet

root@gitlab:~# cat /etc/apt/sources.list.d/puppetlabs.list

deb http://apt.puppetlabs.com precise main  
deb-src http://apt.puppetlabs.com precise main  

deb http://apt.puppetlabs.com precise dependencies  
deb-src http://apt.puppetlabs.com precise dependencies  

最新版puppet在apt中列出

root@gitlab:~# apt-cache policy puppet|head
puppet:
  Installed: (none)
  Candidate: 3.3.0-1puppetlabs1
  Version table:
     3.3.0-1puppetlabs1 0
        500 http://apt.puppetlabs.com/ precise/main amd64 Packages
     3.2.4-1puppetlabs1 0
        500 http://apt.puppetlabs.com/ precise/main amd64 Packages
     3.2.3-1puppetlabs1 0
        500 http://apt.puppetlabs.com/ precise/main amd64 Packages

安装 puppet 3.3.0 会自动带来 ruby​​ 1.8。

 root@gitlab:~# apt-get install puppet-common
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  augeas-lenses debconf-utils facter hiera libaugeas-ruby libaugeas-ruby1.8 libaugeas0 libjson-ruby libruby libruby1.8
  libshadow-ruby1.8 ruby ruby-json ruby-rgen ruby1.8 virt-what
Suggested packages:
  augeas-doc augeas-tools ruby-selinux libselinux-ruby1.8 librrd-ruby1.9.1 librrd-ruby1.8 ri ruby-dev ruby1.8-examples ri1.8
The following NEW packages will be installed:
  augeas-lenses debconf-utils facter hiera libaugeas-ruby libaugeas-ruby1.8 libaugeas0 libjson-ruby libruby libruby1.8
  libshadow-ruby1.8 puppet-common ruby ruby-json ruby-rgen ruby1.8 virt-what
0 upgraded, 17 newly installed, 0 to remove and 92 not upgraded.
Need to get 3,664 kB of archives.
After this operation, 14.1 MB of additional disk space will be used.
Do you want to continue [Y/n]?

木偶版

root@gitlab:/tmp/ruby-2.0.0-p247# puppet --version
3.3.0

红宝石版本

root@gitlab:/tmp/ruby-2.0.0-p247# ruby --version
ruby 1.8.7 (2011-06-30 patchlevel 352) [x86_64-linux]

（请注意，ruby 是通过更新选项自动安装的）

root@gitlab:/tmp/ruby-2.0.0-p247# ll `which ruby`
lrwxrwxrwx 1 root root 22 Sep 18 02:57 /usr/bin/ruby -> /etc/alternatives/ruby*


root@gitlab:/tmp/ruby-2.0.0-p247# update-alternatives --list ruby
/usr/bin/ruby1.8

然后我从源代码将 ruby​​ 2.0 安装到它自己的目录中

./configure --prefix=/usr/bin/ruby2.0

然后用 update-alternatives 注册 ruby​​ 2.0

update-alternatives --install /usr/bin/ruby ruby /usr/bin/ruby2.0/bin/ruby 10 

通过 update-alternatives 切换到 ruby​​ 2.0

    root@gitlab:/tmp/ruby-2.0.0-p247# update-alternatives --set ruby /usr/bin/ruby2.0/bin/ruby
update-alternatives: using /usr/bin/ruby2.0/bin/ruby to provide /usr/bin/ruby (ruby) in manual mode.
root@gitlab:/tmp/ruby-2.0.0-p247# ruby --version
ruby 2.0.0p247 (2013-06-27 revision 41674) [x86_64-linux]

我已经这样做了好几次，只要which ruby指向除 1.8 以外的任何 ruby​​ 版本，puppet 都会返回以下错误：

root@gitlab:/tmp/ruby-2.0.0-p247# puppet --version
/usr/bin/ruby2.0/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require': cannot load such file -- puppet/util/command_line (LoadError)
    from /usr/bin/ruby2.0/lib/ruby/2.0.0/rubygems/core_ext/kernel_require.rb:45:in `require'
    from /usr/bin/puppet:3:in `<main>'

如何使用 ruby​​ 2.0 安装 puppet？

Puppet 3.3 与 ruby​​ 2.0 兼容，因为它在puppet 的网站上列出

其他资源

http://projects.puppetlabs.com/issues/18494

RVM 似乎比我需要的复杂得多。此外，常见问题解答说不要将它与 sudo 一起使用，或者以我必须做的 root 身份运行它。 https://rvm.io/
http://rvm.io/support/faq

https://stackoverflow.com/questions/1892877/how-do-i-make-ruby-1-9-the-default-ruby-on-ubuntu