title: Docker: go get from a private GitHub repo
body: <p>I'm trying to run a container that will expose a golang service from a package that I have on a private GitHub repo. </p>
  
  <p>Since I am working with GCE, my starter image is google/debian:wheezy. </p>
  
  <p>After installing all the required dependancies and tools, I am running </p>
  
  <pre><code>RUN go get github.com/&lt;my_org&gt;/&lt;my_package&gt;
  </code></pre>
  
  <p>where the package is a private repo. </p>
  
  <p>I have added my GitHub SSH keys to allow the cloning from the private repo to the docker file:</p>
  
  <pre><code>ADD priv/id_rsa /root/.ssh/id_rsa
  ADD priv/id_rsa.pub /root/.ssh/id_rsa.pub
  </code></pre>
  
  <p>Still, I am getting an error during the go get process when go tried to clone the repo:</p>
  
  <pre><code># cd .; git clone https://github.com/&lt;my_org&gt;/&lt;my_package&gt; /gopath/src/github.com/&lt;my_org&gt;/&lt;my_package&gt;
  Cloning into '/gopath/src/github.com/&lt;my_org&gt;/&lt;my_package&gt;'...
  fatal: could not read Username for 'https://github.com': No such device or address
  package github.com/&lt;my_org&gt;/&lt;my_package&gt;: exit status 128
  </code></pre>
  
  <p>To debug the problem, from the Dockerfile, I am running:</p>
  
  <pre><code>RUN ssh-keyscan -t rsa github.com 2&gt;&amp;1 &gt;&gt; /root/.ssh/known_hosts
  </code></pre>
  
  <p>And this tells me there are some problems. It looks like validating the private key is OK but something weird is going on the the public key. This is the complete ssh-keyscan result:</p>
  
  <pre><code>OpenSSH_6.0p1 Debian-4+deb7u2, OpenSSL 1.0.1e 11 Feb 2013
  Pseudo-terminal will not be allocated because stdin is not a terminal.
  debug1: Reading configuration data /etc/ssh/ssh_config
  debug1: /etc/ssh/ssh_config line 19: Applying options for *
  debug1: Connecting to github.com [192.30.252.129] port 22.
  debug1: Connection established.
  debug1: permanently_set_uid: 0/0
  debug1: identity file /root/.ssh/id_rsa type 1
  debug1: Checking blacklist file /usr/share/ssh/blacklist.RSA-2048
  debug1: Checking blacklist file /etc/ssh/blacklist.RSA-2048
  debug1: identity file /root/.ssh/id_rsa-cert type -1
  debug1: identity file /root/.ssh/id_dsa type -1
  debug1: identity file /root/.ssh/id_dsa-cert type -1
  debug1: identity file /root/.ssh/id_ecdsa type -1
  debug1: identity file /root/.ssh/id_ecdsa-cert type -1
  debug1: Remote protocol version 2.0, remote software version libssh-0.6.0
  debug1: no match: libssh-0.6.0
  debug1: Enabling compatibility mode for protocol 2.0
  debug1: Local version string SSH-2.0-OpenSSH_6.0p1 Debian-4+deb7u2
  debug1: SSH2_MSG_KEXINIT sent
  debug1: SSH2_MSG_KEXINIT received
  debug1: kex: server-&gt;client aes128-ctr hmac-sha1 none
  debug1: kex: client-&gt;server aes128-ctr hmac-sha1 none
  debug1: sending SSH2_MSG_KEX_ECDH_INIT
  debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
  debug1: Server host key: RSA 16:27:ac:a5:76:28:2d:36:63:1b:56:4d:eb:df:a6:48
  debug1: Host 'github.com' is known and matches the RSA host key.
  debug1: Found key in /root/.ssh/known_hosts:1
  Warning: Permanently added the RSA host key for IP address '192.30.252.129' to the list of known hosts.
  debug1: ssh_rsa_verify: signature correct
  debug1: SSH2_MSG_NEWKEYS sent
  debug1: expecting SSH2_MSG_NEWKEYS
  debug1: SSH2_MSG_NEWKEYS received
  debug1: Roaming not allowed by server
  debug1: SSH2_MSG_SERVICE_REQUEST sent
  debug1: SSH2_MSG_SERVICE_ACCEPT received
  debug1: Authentications that can continue: publickey
  debug1: Next authentication method: publickey
  debug1: Offering RSA public key: /root/.ssh/id_rsa
  debug1: Server accepts key: pkalg ssh-rsa blen 279
  debug1: key_parse_private_pem: PEM_read_PrivateKey failed
  debug1: read PEM private key done: type &lt;unknown&gt;
  debug1: read_passphrase: can't open /dev/tty: No such device or address
  debug1: Trying private key: /root/.ssh/id_dsa
  debug1: Trying private key: /root/.ssh/id_ecdsa
  debug1: No more authentication methods to try.
  Permission denied (publickey).
  </code></pre>
  
  <p>I have tried chmod 600 and chmod 700 on the priv/public keys, this did not help. </p>
  
  <p>Any clues? Has anyone succeeding in running go get that fetches from private repos on debian from docker? </p>