[Pacemaker] Get group behaviour with Master slave or clones envolved

[Néstor C.]

2014-02-17 1:22 GMT+01:00 Andrew Beekhof <andrew at beekhof.net>:

>
> On 21 Jan 2014, at 10:50 pm, Néstor C. <xalabin at gmail.com> wrote:
>
> >> Hello.
> >>
> >> When you need that some primitives switch in block you can use a group.
>
> >Groups are just a syntactic shortcut for ordering and colocation
> constraints.
>

There is a manner of view this "hyde" contraints?


> >>
> >> There is a manner to get this when you have a clone or a master/slave
> involved?
> >>
> >> For example:
> >>
> >> Imagine a drbd disk (DR), a filesystem over ti (FS) and a service over
> all (SRV).
> >> The first one is a ms resource, and the other, primitives.
> >>
> >> The colocation rules are:
> >> colocation fs_on_dr inf: FS DR:Master
> >> colocation srv_on_fs inf: SRV FS
> >>
> >> The order rules are:
> >> order fs_after_dr inf: DR:promote FS:start
> >> order srv_after_fs inf: FS:start SRV:start
> >>
> >> How can switch the entire cluster to other node if SRV fails? (like if
> all was in a group)
>
> >In what way does it not do so already with the above constraints?


I want some kind of  "circular constraint" like if srv fails move the
entire stack to other node.
If i add other constraint like:
colocation dr on srv inf: DR:Master SRV

It doesn't start.

Thanks!

>
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