[openstack-dev] [Fuel] NTP settings.
mmosesohn at mirantis.com
Wed Nov 12 15:28:46 UTC 2014
That just shifts the error into Nailgun which is forced to examine NTP
settings of the host. With docker containerization, it makes detecting
this much more difficult. Erroring during fuelmenu is the only chance
where a user can effectively set the NTP parameters correctly. We
could write a ton of infrastructure around this capability, but all it
wins us is a more beautiful error that blocks a user from proceeding.
On Wed, Nov 12, 2014 at 7:21 PM, Andrew Woodward <xarses at gmail.com> wrote:
> Should we just block the deployment until the NTP is fixed so they
> know they need to fix it?
> On Wed, Nov 12, 2014 at 6:06 PM, Stanislaw Bogatkin
> <sbogatkin at mirantis.com> wrote:
>> Hi all,
>> Today we have a next workflow about NTP in Fuel:
>> 1. When someone deploy a master node, we need to somehow operate with NTP
>> and set upstream NTP servers to Fuel NTP daemon on master node.
>> 2. NTP will enabled by default and set to default upstream values (from
>> ntp.org pool).
>> 3. If user will enter to fuelmenu then then he can change that values and it
>> will stored as new ones.
>> That can lead to some errors at deploy, some as:
>> 1. User set upstream NTP (or use defaults).
>> 2. By some reasons that NTP servers get unreacheable (i.e. network down).
>> 3. User creates environment and push 'deploy' button.
>> 4. In the middle of deploy process upstream NTP become reacheable and master
>> node sync with them.
>> If time on master node before that sync will have big shift regarding to
>> real time, then we will have 2 problems:
>> 1. Deploy can fail, cause slave nodes will sync with master one time only -
>> right after provisioning and if master node resync with upstream in the
>> middle of deploy - some services can stop works (e.g. mcollective).
>> 3. It will be more complicate to understand logs, cause it will shifted too.
>> As I see, we have two ways to solve this:
>> 1. Check upstream NTP reachability and disable upstream servers if they
>> unreachable at fuelmenu step. It will cost us some shift with real time in
>> the end.
>> 2. Disable NTP upstream servers if they unreachable right after user press
>> 'deploy' button and enable them after deploy is over.
>> OpenStack-dev mailing list
>> OpenStack-dev at lists.openstack.org
> Ceph community
> OpenStack-dev mailing list
> OpenStack-dev at lists.openstack.org
More information about the OpenStack-dev