# Ansible Tower stuck on "Host verification" **URL:** \ **Category:** Ansible Project\ **Created:** [May 20, 2015, 8:22am UTC](https://forum.ansible.com/t/ansible-tower-stuck-on-host-verification/18268 "2015-05-20T08:22:12Z")\ **Posts on this page:** 4\ **Page:** 1
**Author:** ![Andres\_Ivanov](https://avatars.discourse-cdn.com/v4/letter/a/58f4c7/32.png) [@Andres\_Ivanov](https://forum.ansible.com/u/Andres_Ivanov)\ **Post date:** [May 20, 2015, 8:22am UTC](https://forum.ansible.com/t/ansible-tower-stuck-on-host-verification/18268/1 "2015-05-20T08:22:12Z")
Hello, I’m trying to learn Ansible and started with installing Ansible with Tower UI. Tried simple “Helloworld” echo task that fails on Tower but works manually through ansible-playbook. I need to connect to Host through ProxyCommand so my playbook configuration looks like this: - Helloworld - ansible.cfg - ssh.config - helloworld.yml In ansible.cfg: _"[ssh\_connection]_ _ssh\_args = -F ssh.config -o ControlPersist=15m -o ControlMaster=auto -o UserKnownHostsFile=/dev/null_ _control\_path = %(directory)s/%%h-%%r_ _[defaults]_ _system\_errors = false_ _hostfile = /etc/ansible/hosts_ _library = /usr/share/ansible_ _host\_key\_checking = False_ _ask\_sudo\_pass = False_ _pattern = \*_ _timeout = 10_ _poll\_interval = 15"_ In ssh.config: _"Host x.x.x.50_ _User user_ _ProxyCommand ssh user@x.x.x.60 nc %h %p_ _StrictHostKeyChecking no_ _UserKnownHostsFile=/dev/null_ _Host x.x.x.60_ _User user_ _ProxyCommand none_ _StrictHostKeyChecking no_ _UserKnownHostsFile=/dev/null"_ Playbook is a simple echo with a user “user”. Running manually ansible-playbook or ansible ping works fine on both hosts and it successfully hops to x.x.x.50. However on Tower it works on single x.60 server but gets stuck on x.50. Stuck on x.50: _"\ REMOTE\_MODULE setup_ _\< **x.x.x.50** \> EXEC ssh -C -tt -v -F ssh.config -o ControlPersist=15m -o ControlMaster=auto -o UserKnownHostsFile=/dev/null -o ControlPath=“/tmp/ansible\_tower\_5VA1fm/cp/ansible-ssh-%h-%p-%r” -o StrictHostKeyChecking=no -o KbdInteractiveAuthentication=no -o PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey -o PasswordAuthentication=no -o User=user -o ConnectTimeout=10_ _x.x.x.50_ _/bin/sh -c ‘mkdir -p $HOME/.ansible/tmp/ansible-tmp-1432108998.93-90931163714921 && chmod a+rx $HOME/.ansible/tmp/ansible-tmp-1432108998.93-90931163714921 && echo $HOME/.ansible/tmp/ansible-tmp-1432108998.93-90931163714921’ EXEC previous known host file not found for_ _x.x.x.50_ \*The authenticity of host '\*_x.x.x.60_ _( **x.x.x.60** )’ can’t be established… Are you sure you want to continue connecting (yes/no)?"_ Only difference i see is that manually running ansible-playbook uses different ControlPath. I’ve also tried putting custom ControlPaths even setting it in ssh\_args manually and it changes fine when running ansible-playbook manually, but in Tower the path always stays the same tmp/… path. Can anyone help me figure out what could be the problem? Is the problem that Tower is using tmp/ for ControlPath and it’s not persistant before running ProxyCommand? Any ideas how to fix it? ---
**Author:** ![Timothy\_Gerla](https://avatars.discourse-cdn.com/v4/letter/t/977dab/32.png) [@Timothy\_Gerla](https://forum.ansible.com/u/Timothy_Gerla)\ **Post date:** [May 20, 2015, 1:05pm UTC](https://forum.ansible.com/t/ansible-tower-stuck-on-host-verification/18268/2 "2015-05-20T13:05:07Z")
Hi Andres, Can you email [support@ansible.com](mailto:support@ansible.com) with your issue? We’ll be happy to help. This mailing list is primarily for Ansible open source support only, but we can help you with Tower questions directly. Thanks! -Tim ---
**Author:** ![Aaron\_Zuehlke](https://avatars.discourse-cdn.com/v4/letter/a/a88e4f/32.png) [@Aaron\_Zuehlke](https://forum.ansible.com/u/Aaron_Zuehlke)\ **Post date:** [May 20, 2015, 5:01pm UTC](https://forum.ansible.com/t/ansible-tower-stuck-on-host-verification/18268/3 "2015-05-20T17:01:46Z")
I had a similar issue. Make sure you have exec rights in tmp ---
**Author:** ![Aaron\_Zuehlke](https://avatars.discourse-cdn.com/v4/letter/a/a88e4f/32.png) [@Aaron\_Zuehlke](https://forum.ansible.com/u/Aaron_Zuehlke)\ **Post date:** [May 20, 2015, 5:13pm UTC](https://forum.ansible.com/t/ansible-tower-stuck-on-host-verification/18268/4 "2015-05-20T17:13:02Z")
I had a similar issue. Make sure you have exec rights in tmp