I've been able to reproduce but not entirely consistently. If I have only one line in my /etc/hosts file:
127.0.0.1 localhost Running: time ansible all -i "localhost," -m setup -c local takes anywhere from 0.9 seconds to 15 seconds. Adding a second line to /etc/hosts: 127.0.0.1 roan.lan brings runtime into the 0.3 to 0.7 second range. So I think there's definitely something else going on in the system besides ansible that's making this noticable.... Perhaps some non-parallelizable segment of Fedora's DNS lookup mechanism... I do note that having the second line always makes things faster (when the system is in the 0.9 second range for the non-fqdn case, it's in the 0.3 second range for the fqdn case; when it's in the 15 second range for non-fqdn, it's in the 0.7 second range for fqdn. I don't know if this is something that can be addressed within ansible, if it's a problem that the OS needs to look into, or is just considered a host configuration bug. -Toshio On Tue, Nov 4, 2014 at 6:36 AM, Michael DeHaan <[email protected]> wrote: > If someone can help isolate the slow methods on those systems, that would be > great. > > We are not currently seeing this. > > > > On Mon, Nov 3, 2014 at 2:29 PM, Scott Sturdivant > <[email protected]> wrote: >> >> Honestly I haven't bothered digging into ansible source, but here's my >> results on Fedora 20, same as the OP: >> >> $ ansible --version >> ansible 1.7.2 >> >> # Without valid FQDN entry >> $ time ansible all -i "localhost," -m setup -c local >> 0.32s user 0.11s system 2% cpu 20.528 total >> >> # With valid FQDN entry >> $ time ansible all -i "localhost," -m setup -c local >> 0.26s user 0.08s system 83% cpu 0.399 total >> >> >> I'd call a twenty second speed up considerable. >> >> >> I get the same behavior with devel: >> $ ansible --version >> ansible 1.8 (devel e1662422bf) last updated 2014/11/03 12:22:34 (GMT -600) >> lib/ansible/modules/core: (detached HEAD 7f611468a8) last updated >> 2014/10/24 11:15:28 (GMT -600) >> lib/ansible/modules/extras: (detached HEAD a0df36c6ab) last updated >> 2014/10/24 11:15:31 (GMT -600) >> v2/ansible/modules/core: (detached HEAD cb69744bce) last updated >> 2014/10/24 11:15:35 (GMT -600) >> v2/ansible/modules/extras: (detached HEAD 8a4f07eecd) last updated >> 2014/10/24 11:15:38 (GMT -600) >> configured module search path = None >> >> # Without valid FQDN entry >> $ time ansible all -i "localhost," -m setup -c local >> 0.37s user 0.14s system 2% cpu 20.614 total >> >> # Without valid FQDN entry >> $ time python -c 'import socket; socket.gethostname()' >> python -c 'import socket; socket.gethostname()' 0.01s user 0.01s system >> 97% cpu 0.021 total >> >> This last one implies that the socket.gethostname() is not to blame. >> >> >> On Mon, Nov 3, 2014 at 12:10 PM, Michael DeHaan <[email protected]> >> wrote: >>> >>> "Do you have a valid FQDN entry in /etc/hosts? Without that, the setup >>> module slows down considerably." >>> >>> Assume you're referring to the one socket.gethostname() equivalent as a >>> DNS hit? >>> >>> I'm not sure it would be *considerably*... though interested in any >>> timing info you might have. >>> >>> (May imply DNS issues?) >>> >>> >>> >>> >>> On Mon, Nov 3, 2014 at 10:04 AM, Scott Sturdivant >>> <[email protected]> wrote: >>>> >>>> Do you have a valid FQDN entry in /etc/hosts? Without that, the setup >>>> module slows down considerably. >>>> >>>> On Mon, Nov 3, 2014 at 7:24 AM, Michael DeHaan <[email protected]> >>>> wrote: >>>>> >>>>> Hmm, that's quite curious and not something I've heard reported much. >>>>> >>>>> There's also not much logic to get stuck in a loop in there. >>>>> >>>>> If you have Python skills, using "./hacking/test-module" from a >>>>> checkout on that machine would allow inserting some debug that could help >>>>> isolate why it may be taking longer, if it's in fact the setup module that >>>>> is spending the time. >>>>> >>>>> >>>>> >>>>> >>>>> >>>>> On Sun, Nov 2, 2014 at 7:24 AM, pixel fairy <[email protected]> >>>>> wrote: >>>>>> >>>>>> the setup module (and any playbooks) takes an extra 2 min for a fedora >>>>>> 20 based vm. other ansible modules, at least command(date) and yum >>>>>> (upgrade >>>>>> all), take less than a second, on an up to date machine. >>>>>> >>>>>> tried from os x 10.10 (homebrew) and ubuntu 14.04, both running >>>>>> ansible 1.7.2. heres, the -vvvv >>>>>> >>>>>> <akaran> ESTABLISH CONNECTION FOR USER: pixel >>>>>> <akaran> REMOTE_MODULE setup >>>>>> <akaran> EXEC ['ssh', '-C', '-tt', '-vvv', '-o', 'ControlMaster=auto', >>>>>> '-o', 'ControlPersist=60s', '-o', >>>>>> 'ControlPath=/Users/pixel/.ansible/cp/ansible-ssh-%h-%p-%r', '-o', >>>>>> 'KbdInteractiveAuthentication=no', '-o', >>>>>> 'PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey', >>>>>> '-o', 'PasswordAuthentication=no', '-o', 'ConnectTimeout=10', 'akaran', >>>>>> "/bin/sh -c 'mkdir -p >>>>>> $HOME/.ansible/tmp/ansible-tmp-1414929572.02-34091227529968 && chmod a+rx >>>>>> $HOME/.ansible/tmp/ansible-tmp-1414929572.02-34091227529968 && echo >>>>>> $HOME/.ansible/tmp/ansible-tmp-1414929572.02-34091227529968'"] >>>>>> <akaran> PUT >>>>>> /var/folders/2v/w9x69ytx017ckmpz4hmjn5qh0000gn/T/tmpPQYuj0 TO >>>>>> /home/pixel/.ansible/tmp/ansible-tmp-1414929572.02-34091227529968/setup >>>>>> <akaran> EXEC ['ssh', '-C', '-tt', '-vvv', '-o', 'ControlMaster=auto', >>>>>> '-o', 'ControlPersist=60s', '-o', >>>>>> 'ControlPath=/Users/pixel/.ansible/cp/ansible-ssh-%h-%p-%r', '-o', >>>>>> 'KbdInteractiveAuthentication=no', '-o', >>>>>> 'PreferredAuthentications=gssapi-with-mic,gssapi-keyex,hostbased,publickey', >>>>>> '-o', 'PasswordAuthentication=no', '-o', 'ConnectTimeout=10', 'akaran', >>>>>> u"/bin/sh -c 'LANG=en_US.UTF-8 LC_CTYPE=en_US.UTF-8 /usr/bin/python >>>>>> /home/pixel/.ansible/tmp/ansible-tmp-1414929572.02-34091227529968/setup; >>>>>> rm >>>>>> -rf /home/pixel/.ansible/tmp/ansible-tmp-1414929572.02-34091227529968/ >>>>>> >/dev/null 2>&1'"] >>>>>> ... facts ... >>>>>> >>>>>> >>>>>> >>>>>> >>>>>> -- >>>>>> You received this message because you are subscribed to the Google >>>>>> Groups "Ansible Project" group. >>>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>>> an email to [email protected]. >>>>>> To post to this group, send email to [email protected]. >>>>>> To view this discussion on the web visit >>>>>> https://groups.google.com/d/msgid/ansible-project/7bf63dde-3d2a-4562-90b1-5a950800326d%40googlegroups.com. >>>>>> For more options, visit https://groups.google.com/d/optout. >>>>> >>>>> >>>>> -- >>>>> You received this message because you are subscribed to the Google >>>>> Groups "Ansible Project" group. >>>>> To unsubscribe from this group and stop receiving emails from it, send >>>>> an email to [email protected]. >>>>> To post to this group, send email to [email protected]. >>>>> To view this discussion on the web visit >>>>> https://groups.google.com/d/msgid/ansible-project/CA%2BnsWgxXbk4GNt8Bj-uwLak7A%2ByEGWN1JD-SePXZSD8M-rynSw%40mail.gmail.com. >>>>> >>>>> For more options, visit https://groups.google.com/d/optout. >>>> >>>> >>>> -- >>>> You received this message because you are subscribed to the Google >>>> Groups "Ansible Project" group. >>>> To unsubscribe from this group and stop receiving emails from it, send >>>> an email to [email protected]. >>>> To post to this group, send email to [email protected]. >>>> To view this discussion on the web visit >>>> https://groups.google.com/d/msgid/ansible-project/CAPcsqx%3DEMiY5Rgnxwa-S_AWHB5uY%2BtaWy54p1iYsb8Kny7PTpg%40mail.gmail.com. >>>> >>>> For more options, visit https://groups.google.com/d/optout. >>> >>> >>> -- >>> You received this message because you are subscribed to the Google Groups >>> "Ansible Project" group. >>> To unsubscribe from this group and stop receiving emails from it, send an >>> email to [email protected]. >>> To post to this group, send email to [email protected]. >>> To view this discussion on the web visit >>> https://groups.google.com/d/msgid/ansible-project/CA%2BnsWgx26bAEA0-uWDP-XrpUZjTHLkJGuAnCZMq7uFxViVB_ag%40mail.gmail.com. >>> >>> For more options, visit https://groups.google.com/d/optout. >> >> >> -- >> You received this message because you are subscribed to the Google Groups >> "Ansible Project" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected]. >> To post to this group, send email to [email protected]. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/ansible-project/CAPcsqxmZ5DeneYMKQw6V3S7Qch3n1qMbw5K0C_Fy95yWqWo_TA%40mail.gmail.com. >> >> For more options, visit https://groups.google.com/d/optout. > > > -- > You received this message because you are subscribed to the Google Groups > "Ansible Project" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/ansible-project/CA%2BnsWgwKF5hdBYHE1Lq2Nfq_u-Pkzyoqq_%3DVgzudpUMyX9Rdew%40mail.gmail.com. > > For more options, visit https://groups.google.com/d/optout. -- You received this message because you are subscribed to the Google Groups "Ansible Project" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/ansible-project/CAG9juEp1MZtRTbsYo-t5pEgf88enX-h5BRp07Ju6rbs81wgb7A%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
