The mediawiki-vagrant labs project was created on 2015-12-09 as the new location to host a build server for MediaWiki-Vagrant USB installer images.
Since creating the project I have built 3 instances and had the same ssh access failures for all three (ssh -vvv trace below). Just to double check that this was a localized problem for this project I created a test instance in the wikimania-support project and verified that I was able to ssh to it once the initial puppet run had completed. The mwv-image-builder.mediawiki-vagrant.eqiad.wmflabs has been left up to aid in debugging.
$ ssh -vvv mwv-image-builder.mediawiki-vagrant.eqiad.wmflabs OpenSSH_7.1p1, OpenSSL 1.0.2d 9 Jul 2015 debug1: Reading configuration data /Users/bd808/.ssh/config debug1: /Users/bd808/.ssh/config line 38: Applying options for *.wmflabs debug1: /Users/bd808/.ssh/config line 68: Applying options for *.wmflabs debug3: kex names ok: [curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256] debug1: /Users/bd808/.ssh/config line 73: Applying options for * debug1: Reading configuration data /usr/local/etc/ssh/ssh_config debug1: auto-mux: Trying existing master debug1: Control socket "/Users/bd808/.ssh/sockets/e5ff9e9f3ccce5dbae3035602d262b2f38305903" does not exist debug1: Executing proxy command: exec ssh -a -W mwv-image-builder.mediawiki-vagrant.eqiad.wmflabs:22 bastion.wmflabs.org debug1: permanently_drop_suid: 501 debug1: identity file /Users/bd808/.ssh/labs_rsa type 1 debug1: key_load_public: No such file or directory debug1: identity file /Users/bd808/.ssh/labs_rsa-cert type -1 debug1: Enabling compatibility mode for protocol 2.0 debug1: Local version string SSH-2.0-OpenSSH_7.1 debug1: Remote protocol version 2.0, remote software version OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.3 debug1: match: OpenSSH_6.6.1p1 Ubuntu-2ubuntu2.3 pat OpenSSH_6.6.1* compat 0x04000000 debug2: fd 5 setting O_NONBLOCK debug2: fd 4 setting O_NONBLOCK debug1: Authenticating to mwv-image-builder.mediawiki-vagrant.eqiad.wmflabs:22 as 'bd808' debug3: hostkeys_foreach: reading file "/Users/bd808/.ssh/known_hosts" debug3: record_hostkey: found key type ECDSA in file /Users/bd808/.ssh/known_hosts:223 debug3: load_hostkeys: loaded 1 keys from mwv-image-builder.mediawiki-vagrant.eqiad.wmflabs debug3: order_hostkeyalgs: prefer hostkeyalgs: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521 debug1: SSH2_MSG_KEXINIT sent debug1: SSH2_MSG_KEXINIT received debug2: kex_parse_kexinit: curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256 debug2: kex_parse_kexinit: ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ssh-ed25519,ssh-rsa debug2: kex_parse_kexinit: chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr debug2: kex_parse_kexinit: chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr debug2: kex_parse_kexinit: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1,hmac-md5-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,hmac-ripemd160,hmac-ripemd160@openssh.com,hmac-sha1-96,hmac-md5-96 debug2: kex_parse_kexinit: umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1,hmac-md5-etm@openssh.com,hmac-ripemd160-etm@openssh.com,hmac-sha1-96-etm@openssh.com,hmac-md5-96-etm@openssh.com,hmac-md5,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: curve25519-sha256@libssh.org,diffie-hellman-group-exchange-sha256 debug2: kex_parse_kexinit: ssh-rsa,ssh-dss,ecdsa-sha2-nistp256,ssh-ed25519 debug2: kex_parse_kexinit: chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr debug2: kex_parse_kexinit: chacha20-poly1305@openssh.com,aes256-gcm@openssh.com,aes128-gcm@openssh.com,aes256-ctr,aes192-ctr,aes128-ctr debug2: kex_parse_kexinit: hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,umac-128@openssh.com debug2: kex_parse_kexinit: hmac-sha2-512-etm@openssh.com,hmac-sha2-256-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-512,hmac-sha2-256,umac-128@openssh.com debug2: kex_parse_kexinit: none,zlib@openssh.com debug2: kex_parse_kexinit: none,zlib@openssh.com debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: debug2: kex_parse_kexinit: first_kex_follows 0 debug2: kex_parse_kexinit: reserved 0 debug1: kex: server->client chacha20-poly1305@openssh.com <implicit> none debug1: kex: client->server chacha20-poly1305@openssh.com <implicit> none debug1: expecting SSH2_MSG_KEX_ECDH_REPLY debug1: Server host key: ecdsa-sha2-nistp256 SHA256:qdAWkPcVD/O/FdUil4dmWQKfgVYKSVzzvsaTpj4rSKQ debug3: hostkeys_foreach: reading file "/Users/bd808/.ssh/known_hosts" debug3: record_hostkey: found key type ECDSA in file /Users/bd808/.ssh/known_hosts:223 debug3: load_hostkeys: loaded 1 keys from mwv-image-builder.mediawiki-vagrant.eqiad.wmflabs debug1: Host 'mwv-image-builder.mediawiki-vagrant.eqiad.wmflabs' is known and matches the ECDSA host key. debug1: Found key in /Users/bd808/.ssh/known_hosts:223 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/bd808/.ssh/labs_rsa (0x7fd0416005f0), explicit debug1: Authentications that can continue: publickey debug3: start over, passed a different list publickey debug3: preferred publickey debug3: authmethod_lookup publickey debug3: remaining preferred: debug3: authmethod_is_enabled publickey debug1: Next authentication method: publickey debug1: Offering RSA public key: /Users/bd808/.ssh/labs_rsa debug3: send_pubkey_test debug2: we sent a publickey packet, wait for reply debug1: Server accepts key: pkalg ssh-rsa blen 279 debug2: input_userauth_pk_ok: fp SHA256:QDCTAHctsnhkMb2PzvojA9Re/YsNw4kJVS4sFXMvSOo debug3: sign_and_send_pubkey: RSA SHA256:QDCTAHctsnhkMb2PzvojA9Re/YsNw4kJVS4sFXMvSOo Connection closed by UNKNOWN