title: lxc-attach failed to enter the namespace - EC2 Instances
body: <p>For some reason I cannot enter a docker container using Lxc-attach only on EC2 instances. This works on my local machine and on Digital Ocean (KVM) droplets but not on Amazon EC2 xen-paravirtualized Ubuntu12.04 instance. Here are the steps/errors:</p>
  
  <pre><code>root@ip-172-31-46-202:~/scalar/project/docker# lxc-ls
  4074ebf985cfe09b2880a9eabbc7ad3e59283f425f64cfaa72f59f1f23661d18
  
  root@ip-172-31-46-202:~/scalar/project/docker# lxc-attach -n 4074ebf985cfe09b2880a9eabbc7ad3e59283f425f64cfaa72f59f1f23661d18
  lxc-attach: No such file or directory - failed to open '/proc/19731/ns/pid'
  lxc-attach: failed to enter the namespace
  </code></pre>
  
  <p>Does anyone know if there is a way to resolve this issue? Here are my docker version details:</p>
  
  <pre><code>Client version: 0.7.6
  Go version (client): go1.2
  Git commit (client): bc3b2ec
  Server version: 0.7.6
  Git commit (server): bc3b2ec
  Go version (server): go1.2
  Last stable version: 0.7.6
  </code></pre>
  
  <p>Also:</p>
  
  <pre><code>lxc version: 0.7.5
  </code></pre>