问题
OSX, 10.9.2:
$ ruby -v
ruby 2.0.0p247 (2013-06-27 revision 41674) [universal.x86_64-darwin13]
$ knife -v
Chef: 11.10.4
When I run:
$ knife ec2 server list
I get:
FATAL: Cannot find sub command for: 'ec2 server list'
The ec2 commands were moved to plugins in Chef 0.10
You can install the plugin with `(sudo) gem install knife-ec2
I have the gem installed:
sudo gem install knife-ec2
runs without error. And gem list shows that it is installed:
$ sudo gem list|grep knife-ec2
knife-ec2 (0.8.0)
The gem appears to be correctly installed here:
ls /Library/Ruby/Gems/2.0.0/gems/knife-ec2-0.8.0/
...
/usr/bin/knife on its own runs fine. Its quite likely it has something to do with where knife is looking for plugins, but what to do about it is unclear.
回答1:
I had this or a similar problem when I installed the chefdk after I'd already had chef/knife/knife-ec2 installed via gems (in an attempt to get vagrant-berkshelf working, if you're wondering).
What I found is that when installing the chefdk the embedded chef ruby is used by the knife binary in your path, instead of the system ruby, so you have to install your gems to the chef embedded ruby.
On OSX I did it like this:
/opt/chefdk/embedded/bin/gem install knife-ec2
Edit: Looks like there's a chef command to do this already:
chef gem install knife-ec2
回答2:
What's the output when you try running gem install knife? gem uses different paths when you run it with sudo
You can either run knife with sudo:
sudo knife ec2 server list
Or install gem as current user:
gem install knife-ec2
If the latter doesn't work, use RVM:
\curl -sSL https://get.rvm.io | bash
rvm install 2.0.0p247
gem install knife-ec2
回答3:
You are installing things into your system ruby (which is ill-advised). You need to use sudo before your knife command in this instance.
回答4:
Yes, This is tricky... Reason: You have 2 GEM binaries in your system. One by "rubygems in /bin/gem" and another by chef in "/opt/chef/embedded/bin/gem"
Knife makes use of the gem binary in the chef installation.
Solution: So you should have the plugins installed as /opt/chef/embedded/bin/gem install knife-ec2 /opt/chef/embedded/bin/gem install
Enjoy :)...
来源：https://stackoverflow.com/questions/22620745/how-do-i-install-the-knife-ec2-plugin