cafebazaar / blacksmith-kubernetes Goto Github PK

Why do we need this?

Hi,

I would like to understand the usage of this module, would you mind providing some little docs ?

Thank you.

Currently masters and workers don't have suitable way to be differentiated via label/selector system and as our masters are also schedule-able, a blind daemonset/rs/rc can schedules itself on master but this can be improved.

cp binaries/initial.yaml workspace/

In the current state, the name of the machine network interfaces are needed to be known for this to work, and what makes things even worse is that they all need to be the same since there is only one value supplied to the templates for this purpose.

The workers have to obey such naming convention too (see this). It is highly unlikely that the internal interface name of a new machine that is being added as a worker to the cluster is equal to the name of the internal interface of the previous (and possibly from a different vendor) workers‌ (and even the masters).

And even with all that fixed, figuring out the interface names and which name corresponds to which physical interface is a task which most probably will need physical human interaction with the machine.

The name of the interface is currently needed for configuring bootstrappers and workers networks and running blacksmith on bootsrappers‌. (Am‌ I missing anything here?)

We most probably want bootstrappers to bring up blacksmith on their internal interface (this definition of "internal interface" goes the same way for workers too) i.e. the one from which they received PXE boot configurations, but the interface names are not needed to be known the first time they boot.

We can inject a script which sends the "internal" interface name of the newly booted machine to the bootstrappers, and with this fixed, the machines can put their internal interface name in masters etcd themselves. The templates/blacksmith run scripts can then be cooked based on these values (in the latter case we can even query etcd directly) and with a little luck (?) we probably won't need to change anything else in blacksmith.

@remohammadi your thoughts on this?