On 08/19/2016 01:54 PM, Jean-Yves LENHOF wrote:
Le 19/08/2016 à 13:19, Frank Thommen a écrit :
Dear all,
doing my first steps with ansible I noticed, that on some clients
executing playbooks completely hangs. The common problem on these
hosts is, that they are either swapping (even very small amounts of
swap used) or they have problems with hanging/not responding NFS
filesystems. In all cases, these two problems appeared together.
Therefore I cannot say, which is the problematic issue.
However all local filesystems are perfectly ok and responding and
working. The system over-all is also working fine.
Running even the simplest playbooks on these hosts hangs completely,
even though the playbooks don't access the problematic filesystems.
Running the same commands as ad-hoc commands, works fine:
$ ansible buggyhost -m shell -a '/bin/ls' --key=id_rsa
buggyhost | SUCCESS | rc=0 >>
[... `/bin/ls` output here..]
$
... but ...
$ ansible-playbook ls.yml --extra-vars "target=buggyhost"
--private-key=id_rsa
PLAY [buggyhost]
***************************************************************
TASK [setup]
*******************************************************************
[...and here it hangs...]
^C
$
using -vvv doesn't really help:
$ ansible-playbook -vvv ls.yml --extra-vars "target=buggyhost"
--private-key=id_rsa
Using /root/ansible-config/ansible.cfg as config file
PLAYBOOK: ls.yml
***************************************************************
1 plays in ls.yml
PLAY [buggyhost]
***************************************************************
TASK [setup]
*******************************************************************
Using module file
/root/ansible/ansible/lib/ansible/modules/core/system/setup.py
<buggyhost> ESTABLISH SSH CONNECTION FOR USER: None
<buggyhost> SSH: EXEC ssh -q -C -o ControlMaster=auto -o
ControlPersist=60s -o StrictHostKeyChecking=no -o
'IdentityFile="id_rsa"' -o KbdInteractiveAuthentication=no -o
PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey
-o PasswordAuthentication=no -o ConnectTimeout=10 -o
ControlPath=/root/.ansible/cp/ansible-ssh-%h-%p-%r buggyhost '/bin/sh
-c '"'"'( umask 77 && mkdir -p "` echo
$HOME/.ansible/tmp/ansible-tmp-1471604358.1-265208088531534 `" && echo
ansible-tmp-1471604358.1-265208088531534="` echo
$HOME/.ansible/tmp/ansible-tmp-1471604358.1-265208088531534 `" ) &&
sleep 0'"'"''
<buggyhost> PUT /tmp/tmp7cAXoN TO
/root/.ansible/tmp/ansible-tmp-1471604358.1-265208088531534/setup.py
<buggyhost> SSH: EXEC sftp -b - -C -o ControlMaster=auto -o
ControlPersist=60s -o StrictHostKeyChecking=no -o
'IdentityFile="id_rsa"' -o KbdInteractiveAuthentication=no -o
PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey
-o PasswordAuthentication=no -o ConnectTimeout=10 -o
ControlPath=/root/.ansible/cp/ansible-ssh-%h-%p-%r '[buggyhost]'
<buggyhost> ESTABLISH SSH CONNECTION FOR USER: None
<buggyhost> SSH: EXEC ssh -q -C -o ControlMaster=auto -o
ControlPersist=60s -o StrictHostKeyChecking=no -o
'IdentityFile="id_rsa"' -o KbdInteractiveAuthentication=no -o
PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey
-o PasswordAuthentication=no -o ConnectTimeout=10 -o
ControlPath=/root/.ansible/cp/ansible-ssh-%h-%p-%r buggyhost '/bin/sh
-c '"'"'chmod -R u+x
/root/.ansible/tmp/ansible-tmp-1471604358.1-265208088531534/ && sleep
0'"'"''
<buggyhost> ESTABLISH SSH CONNECTION FOR USER: None
<buggyhost> SSH: EXEC ssh -q -C -o ControlMaster=auto -o
ControlPersist=60s -o StrictHostKeyChecking=no -o
'IdentityFile="id_rsa"' -o KbdInteractiveAuthentication=no -o
PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey
-o PasswordAuthentication=no -o ConnectTimeout=10 -o
ControlPath=/root/.ansible/cp/ansible-ssh-%h-%p-%r -tt buggyhost
'/bin/sh -c '"'"'/usr/bin/python
/root/.ansible/tmp/ansible-tmp-1471604358.1-265208088531534/setup.py;
rm -rf "/root/.ansible/tmp/ansible-tmp-1471604358.1-265208088531534/"
/dev/null 2>&1 && sleep 0'"'"''
^C
$
The playbook being
$ cat ls.yml
---
- hosts: '{{ target }}'
tasks:
- name: Run ls
shell: /bin/ls
$
I am using asible 2.2.0 (devel 3afe50dfe2). Server and clients are
running openSuSE 13.1.
Any idea, why playbooks hang in this situation?
Cheers
frank
The first task ansible is doing is gathering facts.... In facts there
are mounted filesystems, so the NFS one too
Thanks a lot. Using 'gather_facts: no' in the playbook solved this issue:
---
- hosts: '{{ target }}'
gather_facts: no
tasks:
- name: Run ls
shell: /bin/ls
However I found this feature to be quite hidden in the documentation.
IMHO gather_facts should be off by default and only on on request.
Cheers
frank
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