fix#2193
Fix regression introduced by PR allowing MDS config creation in init
container. This allows the new deployment-based mds clusters to scale
down where currently they can only remain constant or scale up.
Signed-off-by: Blaine Gardner <blaine.gardner@suse.com>
Progress toward issue #2003.
Includes design from design doc PR #1578
Use init containers to create configuration for Ceph mgrs. There is only
one init container in this design. The init container calls the Rook
binary to create Ceph config files which are then shared with the mds
daemon main container.
Once this init is run, the main mds daemon is run. Leaving room to use
the Ceph-versioned image in the future, call `ceph-mds --foreground ...`
to run the Ceph mds.
The refactor to using an init container also necessitated refactoring
the mdses replicaset implementation to a deployment-per-pod
implementation due to a chicken-egg problem. With a single container (in
the before times) the Rook binary was able to call the ceph-mds daemon
with an id generated from the pod name. Since the pod name is not known
before runtime, and the id is one of the few params that must be
specified to Ceph daemons on run, it is necessary to know the id
beforehand; thus the move to a deployment architecture following the
likes of the mon and mgr daemons.
Signed-off-by: Blaine Gardner <blaine.gardner@suse.com>
Ceph expects to be able to reason about physical hardware / nodes.
Before this patch the NODE_NAME that was available referred to the pod
name. This patch exposes the underlying node name, pod, and pod
namespace for the ceph daemons to consume.
fixes: #2078
Signed-off-by: Noah Watkins <nwatkins@redhat.com>
To help with code readability, include daemons from `pkg/daemon/ceph`
as `<dmn>daemon "github.com/rook/rook/pkg/daemon/ceph/<dmn>`. This will
make it easier to understand code lines without needing to scroll up to
check the includes, as there are mon/mds/mgr/osd/rgw packages for
daemons as well as operator and cmd.
Signed-off-by: Blaine Gardner <blaine.gardner@suse.com>
travisn
Blaine Gardner
Noah Watkins
Ganesh Maharaj Mahalingam
Jared Watts