Public bug reported: The function nova.utils.sanitize_hostname() sanitizes instance names to make them suitable for use as host names. Among other things it contains the function truncate_hostname() that truncates host names to a maximum length of 63 characters. Unfortunately this truncation does not take into account the host names' domain part (DEFAULT/dhcp_domain in nova.conf).
Consequently, a 63 character host name plus a domain part (e.g. `.novalocal`) will yield a 73 character net host name passed to cloud-init inside the instance, which can cause problems with host name setting code (this can prevent instances from deploying properly, see https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1432758 ). The Heat project has code to handle this kind of problem, but it's more of a stopgap measure: https://github.com/openstack/heat/commit/8ac7fa02063386a8eb73380d83261f7174781383 I think the better place to fix this is Nova. Unlike Heat, Nova knows the domain name it uses and can truncate host names enough to leave room for the domain name. ** Affects: nova Importance: Undecided Status: New ** Tags: hostname -- You received this bug notification because you are a member of Yahoo! Engineering Team, which is subscribed to OpenStack Compute (nova). https://bugs.launchpad.net/bugs/1614148 Title: sanitize_hostname() fails to account for domain part Status in OpenStack Compute (nova): New Bug description: The function nova.utils.sanitize_hostname() sanitizes instance names to make them suitable for use as host names. Among other things it contains the function truncate_hostname() that truncates host names to a maximum length of 63 characters. Unfortunately this truncation does not take into account the host names' domain part (DEFAULT/dhcp_domain in nova.conf). Consequently, a 63 character host name plus a domain part (e.g. `.novalocal`) will yield a 73 character net host name passed to cloud-init inside the instance, which can cause problems with host name setting code (this can prevent instances from deploying properly, see https://bugs.launchpad.net/ubuntu/+source/cloud-init/+bug/1432758 ). The Heat project has code to handle this kind of problem, but it's more of a stopgap measure: https://github.com/openstack/heat/commit/8ac7fa02063386a8eb73380d83261f7174781383 I think the better place to fix this is Nova. Unlike Heat, Nova knows the domain name it uses and can truncate host names enough to leave room for the domain name. To manage notifications about this bug go to: https://bugs.launchpad.net/nova/+bug/1614148/+subscriptions -- Mailing list: https://launchpad.net/~yahoo-eng-team Post to : yahoo-eng-team@lists.launchpad.net Unsubscribe : https://launchpad.net/~yahoo-eng-team More help : https://help.launchpad.net/ListHelp