I took it that Vincent was referring to my message of 2013-09-12 <https://groups.google.com/d/msg/ansible-project/8p3XWlo83ho/Q1SflaZ9dyAJ>. In that post I mentioned using /dev/null for the ssh UserKnownHostsFile configuration key, scoped to Host *.amazonaws.com
This configuration triggers single-threaded behavior from ansible because ssh never stores any record of connecting to the EC2 hosts: not the first time, not ever. Because known_hosts is /dev/null. -- Mike On Monday, September 29, 2014 9:30:32 AM UTC-7, Michael DeHaan wrote: > > So I'm confused - are you saying you are using known_hosts that are empty? > > This seems to be a completely unrelated question. > > The mention of /dev/null above seemed to be based on confusion that we > didn't read it, not that it was actually symlinked to /dev/null. > > Can each of you clarify? > > On Mon, Sep 29, 2014 at 12:29 PM, Michael Blakeley <michael....@gmail.com > <javascript:>> wrote: > >> Vincent, I now use a slightly different workaround. Instead of routing >> known_hosts to /dev/null I route it to a temp file. This keeps the EC2 >> noise out of my default known_hosts file, and seems to play well with >> ansible. >> >> From my ~/.ssh/config file: >> Host *.amazonaws.com >> PasswordAuthentication no >> StrictHostKeyChecking no >> UserKnownHostsFile /tmp/ec2_known_hosts >> User ec2-user >> >> >> Hope that helps you. >> >> -- Mike >> >> On Monday, September 29, 2014 8:37:43 AM UTC-7, Vincent Janelle wrote: >>> >>> Exactly like what was described at the start of this thread. :( Setting >>> the environment variable produces the desired parallel execution. >>> >> -- >> 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 ansible-proje...@googlegroups.com <javascript:>. >> To post to this group, send email to ansible...@googlegroups.com >> <javascript:>. >> To view this discussion on the web visit >> https://groups.google.com/d/msgid/ansible-project/550bdafe-2892-477b-9452-bbed389bfbce%40googlegroups.com >> >> <https://groups.google.com/d/msgid/ansible-project/550bdafe-2892-477b-9452-bbed389bfbce%40googlegroups.com?utm_medium=email&utm_source=footer> >> . >> >> 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 ansible-project+unsubscr...@googlegroups.com. To post to this group, send email to ansible-project@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/ansible-project/aa3c8257-cb5c-40b1-94fc-051fee1748fc%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
