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pveceph: Reorganize TOC for new sections

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Put the previous added sections into subsection for a better outline of
the TOC.

With the rearrangement of the first level titles to second level, the
general descriptions of a service needs to move into the new first level
titles. And add/corrects some statements of those descriptions.

Signed-off-by: Alwin Antreich <a.antreich@proxmox.com>
This commit is contained in:
Alwin Antreich 2019-11-06 15:09:08 +01:00 committed by Thomas Lamprecht
parent c1f38fe3af
commit b3338e29cd
1 changed files with 53 additions and 42 deletions
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@ -212,8 +212,8 @@ This sets up an `apt` package repository in
`/etc/apt/sources.list.d/ceph.list` and installs the required software.
Creating initial Ceph configuration
-----------------------------------
Create initial Ceph configuration
---------------------------------
[thumbnail="screenshot/gui-ceph-config.png"]
@ -234,11 +234,8 @@ configuration file.
[[pve_ceph_monitors]]
Creating Ceph Monitors
----------------------
[thumbnail="screenshot/gui-ceph-monitor.png"]
Ceph Monitor
-----------
The Ceph Monitor (MON)
footnote:[Ceph Monitor http://docs.ceph.com/docs/luminous/start/intro/]
maintains a master copy of the cluster map. For high availability you need to
@ -247,6 +244,12 @@ used the installation wizard. You won't need more than 3 monitors as long
as your cluster is small to midsize, only really large clusters will
need more than that.
Create Monitors
~~~~~~~~~~~~~~~
[thumbnail="screenshot/gui-ceph-monitor.png"]
On each node where you want to place a monitor (three monitors are recommended),
create it by using the 'Ceph -> Monitor' tab in the GUI or run.
@ -256,12 +259,9 @@ create it by using the 'Ceph -> Monitor' tab in the GUI or run.
pveceph mon create
----
This will also install the needed Ceph Manager ('ceph-mgr') by default. If you
do not want to install a manager, specify the '-exclude-manager' option.
Destroying Ceph Monitor
----------------------
Destroy Monitors
~~~~~~~~~~~~~~~~
To remove a Ceph Monitor via the GUI first select a node in the tree view and
go to the **Ceph -> Monitor** panel. Select the MON and click the **Destroy**
@ -278,14 +278,17 @@ NOTE: At least three Monitors are needed for quorum.
[[pve_ceph_manager]]
Creating Ceph Manager
----------------------
Ceph Manager
------------
The Manager daemon runs alongside the monitors. It provides an interface to
monitor the cluster. Since the Ceph luminous release at least one ceph-mgr
footnote:[Ceph Manager http://docs.ceph.com/docs/luminous/mgr/] daemon is
required.
The Manager daemon runs alongside the monitors, providing an interface for
monitoring the cluster. Since the Ceph luminous release the
ceph-mgr footnote:[Ceph Manager http://docs.ceph.com/docs/luminous/mgr/] daemon
is required. During monitor installation the ceph manager will be installed as
well.
Create Manager
~~~~~~~~~~~~~~
Multiple Managers can be installed, but at any time only one Manager is active.
[source,bash]
----
@ -296,8 +299,8 @@ NOTE: It is recommended to install the Ceph Manager on the monitor nodes. For
high availability install more then one manager.
Destroying Ceph Manager
----------------------
Destroy Manager
~~~~~~~~~~~~~~~
To remove a Ceph Manager via the GUI first select a node in the tree view and
go to the **Ceph -> Monitor** panel. Select the Manager and click the
@ -315,8 +318,15 @@ the cluster status or usage require a running Manager.
[[pve_ceph_osds]]
Creating Ceph OSDs
------------------
Ceph OSDs
---------
Ceph **O**bject **S**torage **D**aemons are storing objects for Ceph over the
network. It is recommended to use one OSD per physical disk.
NOTE: By default an object is 4 MiB in size.
Create OSDs
~~~~~~~~~~~
[thumbnail="screenshot/gui-ceph-osd-status.png"]
@ -327,8 +337,8 @@ via GUI or via CLI as follows:
pveceph osd create /dev/sd[X]
----
TIP: We recommend a Ceph cluster size, starting with 12 OSDs, distributed evenly
among your, at least three nodes (4 OSDs on each node).
TIP: We recommend a Ceph cluster size, starting with 12 OSDs, distributed
evenly among your, at least three nodes (4 OSDs on each node).
If the disk was used before (eg. ZFS/RAID/OSD), to remove partition table, boot
sector and any OSD leftover the following command should be sufficient.
@ -340,8 +350,7 @@ ceph-volume lvm zap /dev/sd[X] --destroy
WARNING: The above command will destroy data on the disk!
Ceph Bluestore
~~~~~~~~~~~~~~
.Ceph Bluestore
Starting with the Ceph Kraken release, a new Ceph OSD storage type was
introduced, the so called Bluestore
@ -356,8 +365,8 @@ pveceph osd create /dev/sd[X]
.Block.db and block.wal
If you want to use a separate DB/WAL device for your OSDs, you can specify it
through the '-db_dev' and '-wal_dev' options. The WAL is placed with the DB, if not
specified separately.
through the '-db_dev' and '-wal_dev' options. The WAL is placed with the DB, if
not specified separately.
[source,bash]
----
@ -380,8 +389,7 @@ internal journal or write-ahead log. It is recommended to use a fast SSD or
NVRAM for better performance.
Ceph Filestore
~~~~~~~~~~~~~~
.Ceph Filestore
Before Ceph Luminous, Filestore was used as default storage type for Ceph OSDs.
Starting with Ceph Nautilus, {pve} does not support creating such OSDs with
@ -393,8 +401,8 @@ Starting with Ceph Nautilus, {pve} does not support creating such OSDs with
ceph-volume lvm create --filestore --data /dev/sd[X] --journal /dev/sd[Y]
----
Destroying Ceph OSDs
--------------------
Destroy OSDs
~~~~~~~~~~~~
To remove an OSD via the GUI first select a {PVE} node in the tree view and go
to the **Ceph -> OSD** panel. Select the OSD to destroy. Next click the **OUT**
@ -422,14 +430,17 @@ WARNING: The above command will destroy data on the disk!
[[pve_ceph_pools]]
Creating Ceph Pools
-------------------
[thumbnail="screenshot/gui-ceph-pools.png"]
Ceph Pools
----------
A pool is a logical group for storing objects. It holds **P**lacement
**G**roups (`PG`, `pg_num`), a collection of objects.
Create Pools
~~~~~~~~~~~~
[thumbnail="screenshot/gui-ceph-pools.png"]
When no options are given, we set a default of **128 PGs**, a **size of 3
replicas** and a **min_size of 2 replicas** for serving objects in a degraded
state.
@ -461,8 +472,8 @@ http://docs.ceph.com/docs/luminous/rados/operations/pools/]
manual.
Destroying Ceph Pools
---------------------
Destroy Pools
~~~~~~~~~~~~~
To destroy a pool via the GUI select a node in the tree view and go to the
**Ceph -> Pools** panel. Select the pool to destroy and click the **Destroy**
@ -553,8 +564,8 @@ ceph osd pool set <pool-name> crush_rule <rule-name>
----
TIP: If the pool already contains objects, all of these have to be moved
accordingly. Depending on your setup this may introduce a big performance hit on
your cluster. As an alternative, you can create a new pool and move disks
accordingly. Depending on your setup this may introduce a big performance hit
on your cluster. As an alternative, you can create a new pool and move disks
separately.