Implement 'manage share' feature in ZFSonLinux share driver.
Prerequisites:
- share being managed should exist.
- share being managed should not be part of any replication relations.
- share being managed should not have redefined mountpoint.
Details:
- share being managed will be renamed by share driver based on taken ID.
- share being managed will get "quota" attribute set based on provided
value in API (--driver_options size=5) or it will set quota
to nearest bigger rounded integer of already
used space (2,4 -> 3, 3.6 -> 4).
Implements blueprint zfsonlinux-manage-share
DocImpact
Change-Id: I03eab5e02835fe660dde0020601c02c0136bddeb
Fix some information about ZFSonLinux share driver to make it
up-to-date with Mitaka version.
TrivialFix
Change-Id: I286ad6e603f1fd0afa069178f0a603174a988544
Add support for ZFS (on Linux) filesystem.
Following features are supported:
- Create/delete share
- Create/delete snapshot
- Create share from snapshot
- Extend/shrink share
- Update NFS IP-based access rules using new interface.
(SMB support planned for future).
- create/delete/update/promote share replica
ZFS-related notes:
- Any amount of ZFS zpools can be used by share driver.
- Allowed to configure default options for ZFS datasets that are used
for share creation.
- Any amount of nested datasets is allowed to be used.
- All share replicas are read-only.
- All share replicas are synched periodically, not continuously.
So, status 'in_sync' means latest sync was successful.
Time range between syncs equals to value of
config global opt 'replica_state_update_interval'.
Driver-related notes:
- Able to use remote ZFSonLinux storage as well as local.
Other made changes:
- updated driver private data DB methods removing filtering by host
as redundant operation. Replication requires some common metadata
storage and filtering by host breaks it. It is safe to do so, because
if driver gets some ID of entity then it is allowed to read its info
too.
Implements bp zfsonlinux-driver
DocImpact
Change-Id: I3ddd3767184e4843037de0ac75ff18dce709b6dc
