title: sshagent forwarding in jenkins is not working
body: <p>I'm trying to connect to a slave node by using the Launch method: "Launch slave by execution of command on the master".</p>
  
  <p>This is the launch command I'm using:</p>
  
  <pre><code>ssh -vvvA user@host java -jar /tmp/java/slave.jar
  </code></pre>
  
  <p>Normally, I can do ssh to the host like:-</p>
  
  <pre><code>ssh -A user@host
  </code></pre>
  
  <p>And, it works because my keys can be seen in <code>ssh-add</code>'s output</p>
  
  <p>But, in the case of jenkins, it is somehow not using the keys present in <code>ssh-add</code>. I'm not able to forward my ssh agent as is evident from the text in <strong>Bold</strong> in the error below:-</p>
  
  <p>This is the detailed error I get:-</p>
  
  <pre><code>[03/14/14 19:02:36] Launching slave agent
  $ ssh -vvvA user@host java -jar /tmp/java/slave.jar
  OpenSSH_6.2p2, OSSLShim 0.9.8r 8 Dec 2011
  debug1: Reading configuration data /etc/ssh_config
  debug1: /etc/ssh_config line 20: Applying options for *
  debug1: /etc/ssh_config line 50: Applying options for *
  debug2: ssh_connect: needpriv 0
  debug1: Connecting to host [x.x.x.x] port 22.
  debug1: Connection established.
  debug1: identity file /Users/user/.ssh/identity type -1
  debug1: identity file /Users/user/.ssh/identity-cert type -1
  debug1: identity file /Users/user/.ssh/id_rsa type -1
  debug1: identity file /Users/user/.ssh/id_rsa-cert type -1
  debug1: identity file /Users/user/.ssh/id_dsa type -1
  debug1: identity file /Users/user/.ssh/id_dsa-cert type -1
  debug1: Remote protocol version 1.99, remote software version Server-VII-hpn13v1
  debug1: no match: Server-VII-hpn13v1
  debug1: Enabling compatibility mode for protocol 2.0
  debug1: Local version string SSH-2.0-OpenSSH_6.2
  debug2: fd 3 setting O_NONBLOCK
  debug3: load_hostkeys: loading entries for host "x.x.x.x" from file "/Users/user/.ssh/known_hosts"
  debug3: load_hostkeys: found key type DSA in file /Users/user/.ssh/known_hosts:28
  debug3: load_hostkeys: loaded 1 keys
  debug3: order_hostkeyalgs: prefer hostkeyalgs: ssh-dss-cert-v01@openssh.com,ssh-dss-cert-v00@openssh.com,ssh-dss
  debug1: SSH2_MSG_KEXINIT sent
  debug1: SSH2_MSG_KEXINIT received
  debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
  debug2: kex_parse_kexinit: ssh-dss-cert-v01@openssh.com,ssh-dss-cert-v00@openssh.com,ssh-dss,ssh-rsa-cert-v01@openssh.com,ssh-rsa-cert-v00@openssh.com,ssh-rsa
  debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
  debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-gcm@openssh.com,aes256-gcm@openssh.com,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,rijndael-cbc@lysator.liu.se
  debug2: kex_parse_kexinit: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
  debug2: kex_parse_kexinit: hmac-md5-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-sha1,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
  debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
  debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
  debug2: kex_parse_kexinit: 
  debug2: kex_parse_kexinit: 
  debug2: kex_parse_kexinit: first_kex_follows 0 
  debug2: kex_parse_kexinit: reserved 0 
  debug2: kex_parse_kexinit: diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
  debug2: kex_parse_kexinit: ssh-dss
  debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
  debug2: kex_parse_kexinit: aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,arcfour128,arcfour256,arcfour,aes192-cbc,aes256-cbc,rijndael-cbc@lysator.liu.se,aes128-ctr,aes192-ctr,aes256-ctr
  debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
  debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,umac-64@openssh.com,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96
  debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
  debug2: kex_parse_kexinit: none,zlib@openssh.com,zlib
  debug2: kex_parse_kexinit: 
  debug2: kex_parse_kexinit: 
  debug2: kex_parse_kexinit: first_kex_follows 0 
  debug2: kex_parse_kexinit: reserved 0 
  debug2: mac_setup: found hmac-md5
  debug1: kex: server-&gt;client aes128-ctr hmac-md5 none
  debug2: mac_setup: found hmac-md5
  debug1: kex: client-&gt;server aes128-ctr hmac-md5 none
  debug1: SSH2_MSG_KEX_DH_GEX_REQUEST(1024&lt;1024&lt;8192) sent
  debug1: expecting SSH2_MSG_KEX_DH_GEX_GROUP
  debug2: dh_gen_key: priv key bits set: 127/256
  debug2: bits set: 527/1024
  debug1: SSH2_MSG_KEX_DH_GEX_INIT sent
  debug1: expecting SSH2_MSG_KEX_DH_GEX_REPLY
  debug1: Server host key: DSA ee:33:bd:ac:7b:6e:bd:0b:60:6e:49:20:56:cb:00:d3
  debug3: load_hostkeys: loading entries for host "x.x.x.x" from file "/Users/user/.ssh/known_hosts"
  debug3: load_hostkeys: found key type DSA in file /Users/user/.ssh/known_hosts:28
  debug3: load_hostkeys: loaded 1 keys
  debug1: Host 'x.x.x.x' is known and matches the DSA host key.
  debug1: Found key in /Users/user/.ssh/known_hosts:28
  debug2: bits set: 500/1024
  debug1: ssh_dss_verify: signature correct
  debug2: kex_derive_keys
  debug2: set_newkeys: mode 1
  debug1: SSH2_MSG_NEWKEYS sent
  debug1: expecting SSH2_MSG_NEWKEYS
  debug2: set_newkeys: mode 0
  debug1: SSH2_MSG_NEWKEYS received
  debug1: Roaming not allowed by server
  debug1: SSH2_MSG_SERVICE_REQUEST sent
  debug2: service_accept: ssh-userauth
  debug1: SSH2_MSG_SERVICE_ACCEPT received
  debug2: key: /Users/user/.ssh/identity (0x0),
  debug2: key: /Users/user/.ssh/id_rsa (0x0),
  debug2: key: /Users/user/.ssh/id_dsa (0x0),
  debug1: Authentications that can continue: publickey
  debug3: start over, passed a different list publickey
  debug3: preferred publickey,keyboard-interactive,password
  debug3: authmethod_lookup publickey
  debug3: remaining preferred: keyboard-interactive,password
  debug3: authmethod_is_enabled publickey
  debug1: Next authentication method: publickey
  **debug1: Trying private key: /Users/user/.ssh/identity
  debug3: no such identity: /Users/user/.ssh/identity: No such file or directory
  debug1: Trying private key: /Users/user/.ssh/id_rsa
  debug3: no such identity: /Users/user/.ssh/id_rsa: No such file or directory
  debug1: Trying private key: /Users/user/.ssh/id_dsa
  debug3: no such identity: /Users/user/.ssh/id_dsa: No such file or directory
  debug2: we did not send a packet, disable method**
  debug1: No more authentication methods to try.
  Permission denied (publickey).
  ERROR: Unable to launch the slave agent for x.x.x.x
  java.io.EOFException: unexpected stream termination
      at hudson.remoting.ClassicCommandTransport.create(ClassicCommandTransport.java:135)
      at hudson.remoting.Channel.&lt;init&gt;(Channel.java:406)
      at hudson.remoting.Channel.&lt;init&gt;(Channel.java:402)
      at hudson.remoting.Channel.&lt;init&gt;(Channel.java:363)
      at hudson.remoting.Channel.&lt;init&gt;(Channel.java:359)
      at hudson.slaves.SlaveComputer.setChannel(SlaveComputer.java:346)
      at hudson.slaves.CommandLauncher.launch(CommandLauncher.java:122)
      at hudson.slaves.SlaveComputer$1.call(SlaveComputer.java:230)
      at java.util.concurrent.FutureTask.run(FutureTask.java:262)
      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
      at java.lang.Thread.run(Thread.java:744)
  </code></pre>
  
  <p>From my jenkins server:-</p>
  
  <pre><code>root@x.x.x.x:$  echo $SSH_AUTH_SOCK
  /tmp/launch-52rSLt/Listeners
  </code></pre>
  
  <p>I've followed all the questions on stackoverflow and also found this URL (<a href="https://help.github.com/articles/using-ssh-agent-forwarding" rel="nofollow">https://help.github.com/articles/using-ssh-agent-forwarding</a>) in one of the questions, but ,things are not working out till now</p>
  
  <p>Please guide me as to where I'm doing wrong.</p>
  
  <p>Thanks</p>