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Added the -o option to allow more SSH options #1

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3 changes: 3 additions & 0 deletions README.md
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Original file line number Diff line number Diff line change
Expand Up @@ -37,8 +37,11 @@ NOTE: Some linux users have reported problems using /etc/csshrc, but have had su
-k, --access-key [KEY] AWS access key
-s, --secret-key [SECRET] AWS secret key
-r, --region [REGION] AWS region
-o, --options [SSH_OPTIONS] ssh options to pass directly to cssh


$cluster -l ec2-user -t Name -v web,database
$cluster -o"-i /Path/to/key.pem" -t TagName -v database

## Contributing

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26 changes: 23 additions & 3 deletions bin/cluster
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Expand Up @@ -4,9 +4,10 @@ require 'optparse'
require 'rubygems'
require 'aws-sdk'


options = {'tag' => 'role', 'user' => 'ec2-user'}
OptionParser.new do |opts|
opts.banner = "Usage: cluster [-t TAG] [-l USER] [-k KEY -s SECRET] [-r region] -v VALUES"
opt_parser = OptionParser.new do |opts|
opts.banner = "Usage: cluster [-t TAG] [-l USER] [-k KEY -s SECRET] [-r region] [-o SSH_OPTIONS] -v VALUES"

opts.on("-l", "--login [USER]", "Log in with this user (default: #{options['user']}") do |opt|
options['user'] = opt
Expand All @@ -31,8 +32,21 @@ OptionParser.new do |opts|
opts.on("-r", "--region [REGION]", "AWS region") do |opt|
options['region'] = opt
end

#Allow -o to be passed to give specific ssh options
opts.on("-o", "--options [SSH_OPTIONS]", "ssh options to pass directly to cssh") do |opt|
options['SSH_OPTIONS'] = opt
end

#if no arguments are passed, print the help information and quit
if ARGV.length == 0
print opts.help()
exit
end

end.parse!


if !options['aws_secret_key'].nil? && !options['aws_access_key'].nil?
AWS.config(access_key_id: options['aws_access_key'], secret_access_key: options['aws_secret_key'])
end
Expand All @@ -41,9 +55,15 @@ if !options['region'].nil?
AWS.config(region: options['region'])
end


ec2 = AWS.ec2
dns = ec2.instances.tagged(options['tag']).tagged_values(options['values']).map{|instance| instance.dns_name}

cssh = (/darwin/ =~ RUBY_PLATFORM) ? 'csshX' : 'cssh'

exec "#{cssh} -l #{options['user']} #{dns.join ' '}"
# if options contain '-l' to specify user, and user is set, then don't specify user on the command
if (options['SSH_OPTIONS'] =~ /\-l/) && (!options['user'].nil?)
exec "#{cssh} -o\"#{options['SSH_OPTIONS']}\" #{dns.join ' '}"
else
exec "#{cssh} -l #{options['user']} -o\"#{options['SSH_OPTIONS']}\" #{dns.join ' '}"
end