Gitlab prompts for password while push for git use

Question

I installed gitlab on my servers at linode. All services of gitlab are working fantastic. I am able to login, create users, repos etc. But the problem I am facing is when I try to push a repo it prompts a password for the git user as follows:

[e-mail]'s password

I have followed the instructions of installing gitlab at: https://github.com/gitlabhq/gitlabhq/blob/master/doc/install/installation.md and have disable the login got the user git using the following line mentioned in the installation guide:

sudo adduser --disabled-login --gecos 'GitLab' git

I am using gitlab version 6. What could be the problem?

The output of: ssh -Tvvv [e-mail] is as follows:

OpenSSH_5.9p1 Debian-5ubuntu1.1, OpenSSL 1.0.1 14 Mar 2012
debug1: Reading configuration data /etc/ssh/ssh_config
debug1: /etc/ssh/ssh_config line 19: Applying options for *
debug2: ssh_connect: needpriv 0
debug1: Connecting to gitlab.myserver.com [MY_IP] port 22.
debug1: Connection established.
debug3: Incorrect RSA1 identifier
debug3: Could not load "/home/swaroop/.ssh/id_rsa" as a RSA1 public key
debug1: identity file /home/swaroop/.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 /home/swaroop/.ssh/id_rsa-cert type -1
debug1: identity file /home/swaroop/.ssh/id_dsa type -1
debug1: identity file /home/swaroop/.ssh/id_dsa-cert type -1
debug1: identity file /home/swaroop/.ssh/id_ecdsa type -1
debug1: identity file /home/swaroop/.ssh/id_ecdsa-cert type -1
debug1: Remote protocol version 2.0, remote software version OpenSSH_5.9p1 Debian-5ubuntu1.1
debug1: match: OpenSSH_5.9p1 Debian-5ubuntu1.1 pat OpenSSH*
debug1: Enabling compatibility mode for protocol 2.0
debug1: Local version string SSH-2.0-OpenSSH_5.9p1 Debian-5ubuntu1.1
debug2: fd 3 setting O_NONBLOCK
debug3: load_hostkeys: loading entries for host "gitlab.myserver.com" from file "/home/swaroop/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file /home/swaroop/.ssh/known_hosts:92
debug3: load_hostkeys: loaded 1 keys
debug3: order_hostkeyalgs: prefer hostkeyalgs: [e-mail],[e-mail],[e-mail],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521
debug1: SSH2_MSG_KEXINIT sent
debug1: SSH2_MSG_KEXINIT received
debug2: kex_parse_kexinit: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: [e-mail],[e-mail],[e-mail],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,[e-mail],[e-mail],[e-mail],[e-mail],ssh-rsa,ssh-dss
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[e-mail]
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[e-mail]
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[e-mail],hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,[e-mail],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[e-mail],hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,[e-mail],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[e-mail],zlib
debug2: kex_parse_kexinit: none,[e-mail],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: ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group-exchange-sha1,diffie-hellman-group14-sha1,diffie-hellman-group1-sha1
debug2: kex_parse_kexinit: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[e-mail]
debug2: kex_parse_kexinit: aes128-ctr,aes192-ctr,aes256-ctr,arcfour256,arcfour128,aes128-cbc,3des-cbc,blowfish-cbc,cast128-cbc,aes192-cbc,aes256-cbc,arcfour,[e-mail]
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[e-mail],hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,[e-mail],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: hmac-md5,hmac-sha1,[e-mail],hmac-sha2-256,hmac-sha2-256-96,hmac-sha2-512,hmac-sha2-512-96,hmac-ripemd160,[e-mail],hmac-sha1-96,hmac-md5-96
debug2: kex_parse_kexinit: none,[e-mail]
debug2: kex_parse_kexinit: none,[e-mail]
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->client aes128-ctr hmac-md5 none
debug2: mac_setup: found hmac-md5
debug1: kex: client->server aes128-ctr hmac-md5 none
debug1: sending SSH2_MSG_KEX_ECDH_INIT
debug1: expecting SSH2_MSG_KEX_ECDH_REPLY
debug1: Server host key: ECDSA 92:57:61:35:b1:e2:16:3b:7f:ae:e7:8a:dc:0c:98:83
debug3: load_hostkeys: loading entries for host "gitlab.myserver.com" from file "/home/swaroop/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file /home/swaroop/.ssh/known_hosts:92
debug3: load_hostkeys: loaded 1 keys
debug3: load_hostkeys: loading entries for host "MY_IP" from file "/home/swaroop/.ssh/known_hosts"
debug3: load_hostkeys: found key type ECDSA in file /home/swaroop/.ssh/known_hosts:93
debug3: load_hostkeys: loaded 1 keys
debug1: Host 'gitlab.myserver.com' is known and matches the ECDSA host key.
debug1: Found key in /home/swaroop/.ssh/known_hosts:92
debug1: ssh_ecdsa_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: /home/swaroop/.ssh/id_rsa (0x7fd470589410)
debug2: key: /home/swaroop/.ssh/id_dsa ((nil))
debug2: key: /home/swaroop/.ssh/id_ecdsa ((nil))
debug1: Authentications that can continue: publickey,password
debug3: start over, passed a different list publickey,password
debug3: preferred gssapi-keyex,gssapi-with-mic,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: Offering RSA public key: /home/swaroop/.ssh/id_rsa
debug3: send_pubkey_test
debug2: we sent a publickey packet, wait for reply
debug1: Authentications that can continue: publickey,password
debug1: Trying private key: /home/swaroop/.ssh/id_dsa
debug3: no such identity: /home/swaroop/.ssh/id_dsa
debug1: Trying private key: /home/swaroop/.ssh/id_ecdsa
debug3: no such identity: /home/swaroop/.ssh/id_ecdsa
debug2: we did not send a packet, disable method
debug3: authmethod_lookup password
debug3: remaining preferred: ,password
debug3: authmethod_is_enabled password
debug1: Next authentication method: password
[e-mail]'s password: 

Also following is the output when I run: rvmsudo -u git -H bundle exec rake gitlab:env:info RAILS_ENV=production

System information
System:     Ubuntu 12.04
Current User:   git
Using RVM:  yes
RVM Version:    1.22.3
Ruby Version:   2.0.0p247
Gem Version:    2.0.7
Bundler Version:1.3.5
Rake Version:   10.1.0

GitLab information
Version:    6.0.0
Revision:   6c1c284
Directory:  /home/git/gitlab
DB Adapter: mysql2
URL:        http://gitlab.myserver.com
HTTP Clone URL: http://gitlab.myserver.com/some-project.git
SSH Clone URL:  [e-mail]:some-project.git
Using LDAP: no
Using Omniauth: no

GitLab Shell
Version:    1.7.0
Repositories:   /home/git/repositories/
Hooks:      /home/git/gitlab-shell/hooks/
Git:        /usr/bin/git

Answer 1

I had the same problem but it was because my server only accept ssh login from users of "sshusers".

On /etc/ssh/sshd_config I had the following line :

AllowGroups sshusers

In order to fix this issue, I added git to sshusers group:

$ sudo adduser git sshusers 

And then it's working.

Answer 2

On systems with SELinux enabled you should not disable SELinux as suggested in some answers.

To get along with the SELinux restrictions (iff they are the reason for the password prompt; check your /var/log/audit/audit.log ) change the security context for gitlab:

chcon -t user_home_dir_t /var/opt/gitlab/
chcon -t ssh_home_t /var/opt/gitlab/.ssh/
chcon -t ssh_home_t /var/opt/gitlab/.ssh/authorized_keys

(as suggested at the gitlab group)