Communicating with muliple guest VMs

It's a common use case to have multiple VMs configured in a Virtual Box and be able to communicate to them from host. e.g. you may want to setup tomcat in a two node cluster and be able to access the nodes from the terminal in host machine.

By default, while using Virtual Box, guest VMs can see host but host can not see the guest VMs.

following blog has a very good explanation of how to solve this.

http://christophermaier.name/blog/2010/09/01/host-only-networking-with-virtualbox


 

FATAL: Cannot find sub command for: 'ec2'

I was trying to execute knife command to create ec2 server however i was getting error.


here is the command that i was executing:

$ knife ec2 server create -G default -I ami-7000f019 -f m1.small   -S java-quick-start -i ~/.ssh/java-quick-start.pem -x ubuntu   -r 'role[base],role[dbapp_database_master],role[dbapp],recipe[dbapp::db_bootstrap],role[dbapp_load_balancer]'

this is the error i was getting:

FATAL: Cannot find sub command for: 'ec2 server create -G default -I ami-7000f019 -f m1.small -S java-quick-start -i /home/pankaj/.ssh/java-quick-start.pem -x ubuntu -r role[base],role[dbapp_database_master],role[dbapp],recipe[dbapp::db_bootstrap],role[dbapp_load_balancer]'
The ec2 commands were moved to plugins in Chef 0.10
You can install the plugin with `(sudo) gem install knife-ec2

I continued getting this error even when i installed knife-ec2 using command

gem install knife-ec2

finally it worked when i executed following:

$ /opt/chef/embedded/bin/gem install knife-ec2

/opt/chef/embedded/lib/ruby/1.9.1/net/http.rb:763:in `initialize': No such file or directory - getaddrinfo (Errno::ENOENT)

I was trying to upload cookbooks from my workstation to hosted chef and thats when i was getting the error:

/opt/chef/embedded/lib/ruby/1.9.1/net/http.rb:763:in `initialize': No such file or directory - getaddrinfo (Errno::ENOENT)

command that i was executing was :

knife cookbook upload -a -VV

It worked fine when i executed following commands

sudo apt-get install ruby-dev

sudo knife cookbook upload -a -VV