hadoop - 通过 Chef 在ec2中设置ssh无密码

Question

我在 Chef 中有以下 recipe/default.rb:

# Create empty RSA password
template "#{node[:cluster][:ubuntu]}/my_key.pem" do
   source "keys.pem.erb"
   mode 0400
   owner "ubuntu"
   group "ubuntu"
end

bash "ssh-passwordless" do
   user "ubuntu"
   cwd "#{node[:cluster][:ubuntu]}"
   code <<-EOF
   eval `ssh-agent -s`
   ssh-add #{node[:cluster][:ubuntu]}/my_key.pem
   EOF
end

# Create empty RSA password
execute "ssh-keygen" do
  command "sudo -u ubuntu ssh-keygen -q -t rsa -N '' -f /home/ubuntu/.ssh/id_rsa"
  creates "/home/ubuntu/.ssh/id_rsa"
 action :run
end

# Copy public key to node1; if key doesn't exist in authorized_keys, append it to this file
execute <<EOF
cat /home/ubuntu/.ssh/id_rsa.pub | sudo -u ubuntu ssh ubuntu@localhost "(cat > /tmp/tmp.pubkey; mkdir -p .ssh; touch .ssh/authorized_keys; grep #{node[:fqdn]} .ssh/authorized_keys > /dev/null || cat /tmp/tmp.pubkey >> .ssh/authorized_keys; rm /tmp/tmp.pubkey)

如您所见，我尝试了很多方法来让它工作，但是，到目前为止，没有一个成功。目标是消除 EC2 中密码/pem 文件的需要，这样我就可以设置一个 hadoop 集群。我怎样才能做到这一点？

Answer 1

如果我理解得很好，您想在 node1 上创建一个私钥，以便能够通过 ssh 连接到 node2。

您可以通过搜索轻松地做到这一点。

在节点 1 上:

# Create empty RSA password
execute "ssh-keygen" do
  command "sudo -u ubuntu ssh-keygen -q -t rsa -N '' -f /home/ubuntu/.ssh/id_rsa"
  creates "/home/ubuntu/.ssh/id_rsa"
end

ruby_block "expose public key in attribute" do
  block do
    node.default['public_key'] = ::File.read("/home/ubuntu/.ssh/id_rsa.pub")
  end
end

在node2上，搜索node1的公钥:

node1 = search(:node, "name:node1").first
file '/home/ubuntu/.ssh/authorized_keys' do
  content node1['public_key']
end

当然，如果您需要允许多个主机连接，则需要对此进行调整。