Access Kubernetes service (in Vagrant) on localhost

7/13/2016

I have created a service on some pods in Kubernetes. I'm able to curl the service-ip:port and I see some HTML. I want to access the service in my browser on my own PC. What do I have to edit in my Vagrantfile to map my vagrant internal IP on my localhost (of PC)? This is a part of my vagrantfile (I think the part where I have to make edits)

    # Finally, fall back to VirtualBox
    config.vm.provider :virtualbox do |v, override|
      setvmboxandurl(override, :virtualbox)
      v.memory = vm_mem # v.customize ["modifyvm", :id, "--memory", vm_mem]
      v.cpus = $vm_cpus # v.customize ["modifyvm", :id, "--cpus", $vm_cpus]

      # Use faster paravirtualized networking
      v.customize ["modifyvm", :id, "--nictype1", "virtio"]
      v.customize ["modifyvm", :id, "--nictype2", "virtio"]
    end
  end

  # Kubernetes master
  config.vm.define "master" do |c|
    customize_vm c, $vm_master_mem
    if ENV['KUBE_TEMP'] then
      script = "#{ENV['KUBE_TEMP']}/master-start.sh"
      c.vm.provision "shell", run: "always", path: script
    end
    c.vm.network "private_network", ip: "#{$master_ip}"
  end

  # Kubernetes node
  $num_node.times do |n|
    node_vm_name = "node-#{n+1}"
    node_prefix = ENV['INSTANCE_PREFIX'] || 'kubernetes' # must mirror default in cluster/vagrant/config-default.sh
    node_hostname = "#{node_prefix}-#{node_vm_name}"

    config.vm.define node_vm_name do |node|
      customize_vm node, $vm_node_mem

      node_ip = $node_ips[n]
      if ENV['KUBE_TEMP'] then
        script = "#{ENV['KUBE_TEMP']}/node-start-#{n}.sh"
        node.vm.provision "shell", run: "always", path: script
      end
      node.vm.network "private_network", ip: "#{node_ip}"
    end
  end

I tried to change node.vm.network "private_network", ip: "#{node_ip}" in node.vm.network "private_network", ip: "192.xx.xx.xx"but I'm not able to reload my vagrant:

/opt/vagrant/embedded/lib/ruby/2.2.0/ipaddr.rb:559:in `in6_addr': invalid address (IPAddr::InvalidAddressError)
-- DenCowboy
kubernetes
vagrant
vagrantfile

1 Answer

7/13/2016

Your service needs to be of type NodePort to be reached on the IP of the vagrant VM. For example if your pods are started by a replication controller. Create the services with:

kubectl expose rc foobar --type=NodePort --port=80

This will return a random port. Open your browser on your Vagrant node VM at that port and you will reach your service.

-- Sebastien Goasguen
Source: StackOverflow