Upgrading Ceph
================
-Each release of Ceph may have additional steps. Refer to the release-specific
-sections in this document and the `release notes`_ document to identify
-release-specific procedures for your cluster before using the upgrade
-procedures.
+Each release of Ceph may have additional steps. Refer to the `release notes
+document of your release`_ to identify release-specific procedures for your
+cluster before using the upgrade procedures.
Summary
daemons in your cluster before you try to exercise new functionality in a
release.
-The `Upgrade Procedures`_ are relatively simple, but please look at
-distribution-specific sections before upgrading. The basic process involves
+The `Upgrade Procedures`_ are relatively simple, but do look at the `release
+notes document of your release`_ before upgrading. The basic process involves
three steps:
#. Use ``ceph-deploy`` on your admin node to upgrade the packages for
multiple hosts (using the ``ceph-deploy install`` command), or login to each
- host and upgrade the Ceph package `manually`_. For example, when
- `Upgrading Monitors`_, the ``ceph-deploy`` syntax might look like this::
+ host and upgrade the Ceph package `using your distro's package manager`_.
+ For example, when `Upgrading Monitors`_, the ``ceph-deploy`` syntax might
+ look like this::
ceph-deploy install --release {release-name} ceph-node1[ ceph-node2]
ceph-deploy install --release firefly mon1 mon2 mon3
sudo yum install ceph-deploy python-pushy
-Argonaut to Bobtail
-===================
-
-When upgrading from Argonaut to Bobtail, you need to be aware of several things:
-
-#. Authentication now defaults to **ON**, but used to default to **OFF**.
-#. Monitors use a new internal on-wire protocol.
-#. RBD ``format2`` images require upgrading all OSDs before using it.
-
-Ensure that you update package repository paths. For example::
-
- sudo rm /etc/apt/sources.list.d/ceph.list
- echo deb http://download.ceph.com/debian-bobtail/ $(lsb_release -sc) main | sudo tee /etc/apt/sources.list.d/ceph.list
-
-See the following sections for additional details.
-
-Authentication
---------------
-
-The Ceph Bobtail release enables authentication by default. Bobtail also has
-finer-grained authentication configuration settings. In previous versions of
-Ceph (i.e., actually v 0.55 and earlier), you could simply specify::
-
- auth supported = [cephx | none]
-
-This option still works, but is deprecated. New releases support
-``cluster``, ``service`` and ``client`` authentication settings as
-follows::
-
- auth cluster required = [cephx | none] # default cephx
- auth service required = [cephx | none] # default cephx
- auth client required = [cephx | none] # default cephx,none
-
-.. important:: If your cluster does not currently have an ``auth
- supported`` line that enables authentication, you must explicitly
- turn it off in Bobtail using the settings below.::
-
- auth cluster required = none
- auth service required = none
-
- This will disable authentication on the cluster, but still leave
- clients with the default configuration where they can talk to a
- cluster that does enable it, but do not require it.
-
-.. important:: If your cluster already has an ``auth supported`` option defined in
- the configuration file, no changes are necessary.
-
-See `User Management - Backward Compatibility`_ for details.
-
-
-Monitor On-wire Protocol
-------------------------
-
-We recommend upgrading all monitors to Bobtail. A mixture of Bobtail and
-Argonaut monitors will not be able to use the new on-wire protocol, as the
-protocol requires all monitors to be Bobtail or greater. Upgrading only a
-majority of the nodes (e.g., two out of three) may expose the cluster to a
-situation where a single additional failure may compromise availability (because
-the non-upgraded daemon cannot participate in the new protocol). We recommend
-not waiting for an extended period of time between ``ceph-mon`` upgrades.
-
-
-RBD Images
-----------
-
-The Bobtail release supports ``format 2`` images! However, you should not create
-or use ``format 2`` RBD images until after all ``ceph-osd`` daemons have been
-upgraded. Note that ``format 1`` is still the default. You can use the new
-``ceph osd ls`` and ``ceph tell osd.N version`` commands to doublecheck your
-cluster. ``ceph osd ls`` will give a list of all OSD IDs that are part of the
-cluster, and you can use that to write a simple shell loop to display all the
-OSD version strings: ::
-
- for i in $(ceph osd ls); do
- ceph tell osd.${i} version
- done
-
-
-Argonaut to Cuttlefish
-======================
-
-To upgrade your cluster from Argonaut to Cuttlefish, please read this
-section, and the sections on upgrading from Argonaut to Bobtail and
-upgrading from Bobtail to Cuttlefish carefully. When upgrading from
-Argonaut to Cuttlefish, **YOU MUST UPGRADE YOUR MONITORS FROM ARGONAUT
-TO BOBTAIL v0.56.5 FIRST!!!**. All other Ceph daemons can upgrade from
-Argonaut to Cuttlefish without the intermediate upgrade to Bobtail.
-
-.. important:: Ensure that the repository specified points to Bobtail, not
- Cuttlefish.
-
-For example::
-
- sudo rm /etc/apt/sources.list.d/ceph.list
- echo deb http://download.ceph.com/debian-bobtail/ $(lsb_release -sc) main | sudo tee /etc/apt/sources.list.d/ceph.list
-
-We recommend upgrading all monitors to Bobtail before proceeding with the
-upgrade of the monitors to Cuttlefish. A mixture of Bobtail and Argonaut
-monitors will not be able to use the new on-wire protocol, as the protocol
-requires all monitors to be Bobtail or greater. Upgrading only a majority of the
-nodes (e.g., two out of three) may expose the cluster to a situation where a
-single additional failure may compromise availability (because the non-upgraded
-daemon cannot participate in the new protocol). We recommend not waiting for an
-extended period of time between ``ceph-mon`` upgrades. See `Upgrading
-Monitors`_ for details.
-
-.. note:: See the `Authentication`_ section and the
- `User Management - Backward Compatibility`_ for additional information
- on authentication backward compatibility settings for Bobtail.
-
-Once you complete the upgrade of your monitors from Argonaut to
-Bobtail, and have restarted the monitor daemons, you must upgrade the
-monitors from Bobtail to Cuttlefish. Ensure that you have a quorum
-before beginning this upgrade procedure. Before upgrading, remember to
-replace the reference to the Bobtail repository with a reference to
-the Cuttlefish repository. For example::
-
- sudo rm /etc/apt/sources.list.d/ceph.list
- echo deb http://download.ceph.com/debian-cuttlefish/ $(lsb_release -sc) main | sudo tee /etc/apt/sources.list.d/ceph.list
-
-See `Upgrading Monitors`_ for details.
-
-The architecture of the monitors changed significantly from Argonaut to
-Cuttlefish. See `Monitor Config Reference`_ and `Joao's blog post`_ for details.
-Once you complete the monitor upgrade, you can upgrade the OSD daemons and the
-MDS daemons using the generic procedures. See `Upgrading an OSD`_ and `Upgrading
-a Metadata Server`_ for details.
-
-
-Bobtail to Cuttlefish
-=====================
-
-Upgrading your cluster from Bobtail to Cuttlefish has a few important
-considerations. First, the monitor uses a new architecture, so you should
-upgrade the full set of monitors to use Cuttlefish. Second, if you run multiple
-metadata servers in a cluster, ensure the metadata servers have unique names.
-See the following sections for details.
-
-Replace any ``apt`` reference to older repositories with a reference to the
-Cuttlefish repository. For example::
-
- sudo rm /etc/apt/sources.list.d/ceph.list
- echo deb http://download.ceph.com/debian-cuttlefish/ $(lsb_release -sc) main | sudo tee /etc/apt/sources.list.d/ceph.list
-
-
-Monitor
--------
-
-The architecture of the monitors changed significantly from Bobtail to
-Cuttlefish. See `Monitor Config Reference`_ and `Joao's blog post`_ for
-details. This means that v0.59 and pre-v0.59 monitors do not talk to each other
-(Cuttlefish is v.0.61). When you upgrade each monitor, it will convert its
-local data store to the new format. Once you upgrade a majority of monitors,
-the monitors form a quorum using the new protocol and the old monitors will be
-blocked until they get upgraded. For this reason, we recommend upgrading the
-monitors in immediate succession.
-
-.. important:: Do not run a mixed-version cluster for an extended period.
-
-
-MDS Unique Names
-----------------
-
-The monitor now enforces that MDS names be unique. If you have multiple metadata
-server daemons that start with the same ID (e.g., mds.a) the second
-metadata server will implicitly mark the first metadata server as ``failed``.
-Multi-MDS configurations with identical names must be adjusted accordingly to
-give daemons unique names. If you run your cluster with one metadata server,
-you can disregard this notice for now.
-
-
-ceph-deploy
------------
-
-The ``ceph-deploy`` tool is now the preferred method of provisioning new clusters.
-For existing clusters created via the obsolete ``mkcephfs`` tool that would like to transition to the
-new tool, there is a migration path, documented at `Transitioning to ceph-deploy`_.
-
-Cuttlefish to Dumpling
-======================
-
-When upgrading from Cuttlefish (v0.61-v0.61.7) you may perform a rolling
-upgrade. However, there are a few important considerations. First, you must
-upgrade the ``ceph`` command line utility, because it has changed significantly.
-Second, you must upgrade the full set of monitors to use Dumpling, because of a
-protocol change.
-
-Replace any reference to older repositories with a reference to the
-Dumpling repository. For example, with ``apt`` perform the following::
-
- sudo rm /etc/apt/sources.list.d/ceph.list
- echo deb http://download.ceph.com/debian-dumpling/ $(lsb_release -sc) main | sudo tee /etc/apt/sources.list.d/ceph.list
-
-With CentOS/Red Hat distributions, remove the old repository. ::
-
- sudo rm /etc/yum.repos.d/ceph.repo
-
-Then add a new ``ceph.repo`` repository entry with the following contents.
-
-.. code-block:: ini
-
- [ceph]
- name=Ceph Packages and Backports $basearch
- baseurl=http://download.ceph.com/rpm/el6/$basearch
- enabled=1
- gpgcheck=1
- gpgkey=https://download.ceph.com/keys/release.asc
-
-
-.. note:: Ensure you use the correct URL for your distribution. Check the
- http://download.ceph.com/rpm directory for your distribution.
-
-.. note:: Since you can upgrade using ``ceph-deploy`` you will only need to add
- the repository on Ceph Client nodes where you use the ``ceph`` command line
- interface or the ``ceph-deploy`` tool.
-
-
-Dumpling to Emperor
-===================
-
-When upgrading from Dumpling (v0.64) you may perform a rolling
-upgrade.
-
-Replace any reference to older repositories with a reference to the
-Emperor repository. For example, with ``apt`` perform the following::
-
- sudo rm /etc/apt/sources.list.d/ceph.list
- echo deb http://download.ceph.com/debian-emperor/ $(lsb_release -sc) main | sudo tee /etc/apt/sources.list.d/ceph.list
-
-With CentOS/Red Hat distributions, remove the old repository. ::
-
- sudo rm /etc/yum.repos.d/ceph.repo
-
-Then add a new ``ceph.repo`` repository entry with the following contents and
-replace ``{distro}`` with your distribution (e.g., ``el6``, ``rhel6``, etc).
-
-.. code-block:: ini
-
- [ceph]
- name=Ceph Packages and Backports $basearch
- baseurl=http://download.ceph.com/rpm-emperor/{distro}/$basearch
- enabled=1
- gpgcheck=1
- gpgkey=https://download.ceph.com/keys/release.asc
-
-
-.. note:: Ensure you use the correct URL for your distribution. Check the
- http://download.ceph.com/rpm directory for your distribution.
-
-.. note:: Since you can upgrade using ``ceph-deploy`` you will only need to add
- the repository on Ceph Client nodes where you use the ``ceph`` command line
- interface or the ``ceph-deploy`` tool.
-
-
-Command Line Utility
---------------------
-
-In V0.65, the ``ceph`` commandline interface (CLI) utility changed
-significantly. You will not be able to use the old CLI with Dumpling. This means
-that you must upgrade the ``ceph-common`` library on all nodes that access the
-Ceph Storage Cluster with the ``ceph`` CLI before upgrading Ceph daemons. ::
-
- sudo apt-get update && sudo apt-get install ceph-common
-
-Ensure that you have the latest version (v0.67 or later). If you do not,
-you may need to uninstall, auto remove dependencies and reinstall.
-
-See `v0.65`_ for details on the new command line interface.
-
-.. _v0.65: http://docs.ceph.com/docs/master/release-notes/#v0-65
-
-
-Monitor
--------
-
-Dumpling (v0.67) ``ceph-mon`` daemons have an internal protocol change. This
-means that v0.67 daemons cannot talk to v0.66 or older daemons. Once you
-upgrade a majority of monitors, the monitors form a quorum using the new
-protocol and the old monitors will be blocked until they get upgraded. For this
-reason, we recommend upgrading all monitors at once (or in relatively quick
-succession) to minimize the possibility of downtime.
-
-.. important:: Do not run a mixed-version cluster for an extended period.
-
-
-
-Dumpling to Firefly
-===================
-
-If your existing cluster is running a version older than v0.67 Dumpling, please
-first upgrade to the latest Dumpling release before upgrading to v0.80 Firefly.
-
-
-Monitor
--------
-
-Dumpling (v0.67) ``ceph-mon`` daemons have an internal protocol change. This
-means that v0.67 daemons cannot talk to v0.66 or older daemons. Once you
-upgrade a majority of monitors, the monitors form a quorum using the new
-protocol and the old monitors will be blocked until they get upgraded. For this
-reason, we recommend upgrading all monitors at once (or in relatively quick
-succession) to minimize the possibility of downtime.
-
-.. important:: Do not run a mixed-version cluster for an extended period.
-
-
-Ceph Config File Changes
-------------------------
-
-We recommand adding the following to the ``[mon]`` section of your
-``ceph.conf`` prior to upgrade::
-
- mon warn on legacy crush tunables = false
-
-This will prevent health warnings due to the use of legacy CRUSH placement.
-Although it is possible to rebalance existing data across your cluster, we do
-not normally recommend it for production environments as a large amount of data
-will move and there is a significant performance impact from the rebalancing.
-
-
-Command Line Utility
---------------------
-
-In V0.65, the ``ceph`` commandline interface (CLI) utility changed
-significantly. You will not be able to use the old CLI with Firefly. This means
-that you must upgrade the ``ceph-common`` library on all nodes that access the
-Ceph Storage Cluster with the ``ceph`` CLI before upgrading Ceph daemons.
-
-For Debian/Ubuntu, execute::
-
- sudo apt-get update && sudo apt-get install ceph-common
-
-For CentOS/RHEL, execute::
-
- sudo yum install ceph-common
-
-Ensure that you have the latest version. If you do not,
-you may need to uninstall, auto remove dependencies and reinstall.
-
-See `v0.65`_ for details on the new command line interface.
-
-.. _v0.65: http://docs.ceph.com/docs/master/release-notes/#v0-65
-
-
-Upgrade Sequence
-----------------
-
-Replace any reference to older repositories with a reference to the
-Firely repository. For example, with ``apt`` perform the following::
-
- sudo rm /etc/apt/sources.list.d/ceph.list
- echo deb http://download.ceph.com/debian-firefly/ $(lsb_release -sc) main | sudo tee /etc/apt/sources.list.d/ceph.list
-
-With CentOS/Red Hat distributions, remove the old repository. ::
-
- sudo rm /etc/yum.repos.d/ceph.repo
-
-Then add a new ``ceph.repo`` repository entry with the following contents and
-replace ``{distro}`` with your distribution (e.g., ``el6``, ``rhel6``,
-``rhel7``, etc.).
-
-.. code-block:: ini
-
- [ceph]
- name=Ceph Packages and Backports $basearch
- baseurl=http://download.ceph.com/rpm-firefly/{distro}/$basearch
- enabled=1
- gpgcheck=1
- gpgkey=https://download.ceph.com/keys/release.asc
-
-
-Upgrade daemons in the following order:
-
-#. **Monitors:** If the ``ceph-mon`` daemons are not restarted prior to the
- ``ceph-osd`` daemons, the monitors will not correctly register their new
- capabilities with the cluster and new features may not be usable until
- the monitors are restarted a second time.
-
-#. **OSDs**
-
-#. **MDSs:** If the ``ceph-mds`` daemon is restarted first, it will wait until
- all OSDs have been upgraded before finishing its startup sequence.
-
-#. **Gateways:** Upgrade ``radosgw`` daemons together. There is a subtle change
- in behavior for multipart uploads that prevents a multipart request that
- was initiated with a new ``radosgw`` from being completed by an old
- ``radosgw``.
-
-.. note:: Make sure you upgrade your **ALL** of your Ceph monitors **AND**
- restart them **BEFORE** upgrading and restarting OSDs, MDSs, and gateways!
-
-
-Emperor to Firefly
-==================
-
-If your existing cluster is running a version older than v0.67 Dumpling, please
-first upgrade to the latest Dumpling release before upgrading to v0.80 Firefly.
-Please refer to `Cuttlefish to Dumpling`_ and the `Firefly release notes`_ for
-details. To upgrade from a post-Emperor point release, see the `Firefly release
-notes`_ for details.
-
-
-Ceph Config File Changes
-------------------------
-
-We recommand adding the following to the ``[mon]`` section of your
-``ceph.conf`` prior to upgrade::
-
- mon warn on legacy crush tunables = false
-
-This will prevent health warnings due to the use of legacy CRUSH placement.
-Although it is possible to rebalance existing data across your cluster, we do
-not normally recommend it for production environments as a large amount of data
-will move and there is a significant performance impact from the rebalancing.
-
-
-Upgrade Sequence
-----------------
-
-Replace any reference to older repositories with a reference to the
-Firefly repository. For example, with ``apt`` perform the following::
-
- sudo rm /etc/apt/sources.list.d/ceph.list
- echo deb http://download.ceph.com/debian-firefly/ $(lsb_release -sc) main | sudo tee /etc/apt/sources.list.d/ceph.list
-
-With CentOS/Red Hat distributions, remove the old repository. ::
-
- sudo rm /etc/yum.repos.d/ceph.repo
-
-Then add a new ``ceph.repo`` repository entry with the following contents, but
-replace ``{distro}`` with your distribution (e.g., ``el6``, ``rhel6``,
-``rhel7``, etc.).
-
-.. code-block:: ini
-
- [ceph]
- name=Ceph Packages and Backports $basearch
- baseurl=http://download.ceph.com/rpm/{distro}/$basearch
- enabled=1
- gpgcheck=1
- gpgkey=https://download.ceph.com/keys/release.asc
-
-
-.. note:: Ensure you use the correct URL for your distribution. Check the
- http://download.ceph.com/rpm directory for your distribution.
-
-.. note:: Since you can upgrade using ``ceph-deploy`` you will only need to add
- the repository on Ceph Client nodes where you use the ``ceph`` command line
- interface or the ``ceph-deploy`` tool.
-
-
-Upgrade daemons in the following order:
-
-#. **Monitors:** If the ``ceph-mon`` daemons are not restarted prior to the
- ``ceph-osd`` daemons, the monitors will not correctly register their new
- capabilities with the cluster and new features may not be usable until
- the monitors are restarted a second time.
-
-#. **OSDs**
-
-#. **MDSs:** If the ``ceph-mds`` daemon is restarted first, it will wait until
- all OSDs have been upgraded before finishing its startup sequence.
-
-#. **Gateways:** Upgrade ``radosgw`` daemons together. There is a subtle change
- in behavior for multipart uploads that prevents a multipart request that
- was initiated with a new ``radosgw`` from being completed by an old
- ``radosgw``.
-
-
Upgrade Procedures
==================
The following sections describe the upgrade process.
.. important:: Each release of Ceph may have some additional steps. Refer to
- release-specific sections for details **BEFORE** you begin upgrading daemons.
+ the `release notes document of your release`_ for details **BEFORE** you
+ begin upgrading daemons.
Upgrading Monitors
You may also use the package manager for your Linux distribution on
each individual node. To upgrade packages manually on each Debian/Ubuntu
- host, perform the following steps . ::
+ host, perform the following steps::
ssh {mon-host}
sudo apt-get update && sudo apt-get install ceph
For CentOS/Red Hat distributions deployed with ``ceph-deploy``,
the monitor ID is usually ``mon.{hostname}``.
-#. Ensure each monitor has rejoined the quorum. ::
+#. Ensure each monitor has rejoined the quorum::
ceph mon stat
ceph-deploy install --release hammer osd1 osd2 osd3
You may also use the package manager on each node to upgrade packages
- manually. For Debian/Ubuntu hosts, perform the following steps on each
- host. ::
+ `using your distro's package manager`_. For Debian/Ubuntu hosts, perform the
+ following steps on each host::
ssh {osd-host}
sudo apt-get update && sudo apt-get install ceph
ceph-deploy install --release hammer mds1
To upgrade packages manually, perform the following steps on each
- Debian/Ubuntu host. ::
+ Debian/Ubuntu host::
ssh {mon-host}
sudo apt-get update && sudo apt-get install ceph-mds
dependencies and reinstall.
-Transitioning to ceph-deploy
-============================
-
-If you have an existing cluster that you deployed with ``mkcephfs`` (usually
-Argonaut or Bobtail releases), you will need to make a few changes to your
-configuration to ensure that your cluster will work with ``ceph-deploy``.
-
-
-Monitor Keyring
----------------
-
-You will need to add ``caps mon = "allow *"`` to your monitor keyring if it is
-not already in the keyring. By default, the monitor keyring is located under
-``/var/lib/ceph/mon/ceph-$id/keyring``. When you have added the ``caps``
-setting, your monitor keyring should look something like this::
-
- [mon.]
- key = AQBJIHhRuHCwDRAAZjBTSJcIBIoGpdOR9ToiyQ==
- caps mon = "allow *"
-
-Adding ``caps mon = "allow *"`` will ease the transition from ``mkcephfs`` to
-``ceph-deploy`` by allowing ``ceph-create-keys`` to use the ``mon.`` keyring
-file in ``$mon_data`` and get the caps it needs.
-
-
-Use Default Paths
------------------
-
-Under the ``/var/lib/ceph`` directory, the ``mon`` and ``osd`` directories need
-to use the default paths.
-
-- **OSDs**: The path should be ``/var/lib/ceph/osd/ceph-$id``
-- **MON**: The path should be ``/var/lib/ceph/mon/ceph-$id``
-
-Under those directories, the keyring should be in a file named ``keyring``.
-
-
-
-
-.. _Monitor Config Reference: ../../rados/configuration/mon-config-ref
-.. _Joao's blog post: http://ceph.com/dev-notes/cephs-new-monitor-changes
-.. _User Management - Backward Compatibility: ../../rados/configuration/auth-config-ref/#backward-compatibility
-.. _manually: ../install-storage-cluster/
+.. _using your distro's package manager: ../install-storage-cluster/
.. _Operating a Cluster: ../../rados/operations/operating
.. _Monitoring a Cluster: ../../rados/operations/monitoring
-.. _Firefly release notes: ../../release-notes/#v0-80-firefly
-.. _release notes: ../../release-notes
+.. _release notes document of your release: ../../releases
projects / ceph.git / blobdiff