Initial ceph-osd charm
This commit is contained in:
James Page
commit
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.project
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<?xml version="1.0" encoding="UTF-8"?>
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<projectDescription>
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<name>ceph-osd</name>
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<comment></comment>
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<projects>
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</projects>
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<buildSpec>
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<buildCommand>
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<name>org.python.pydev.PyDevBuilder</name>
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<arguments>
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</arguments>
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</buildCommand>
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</buildSpec>
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<natures>
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<nature>org.python.pydev.pythonNature</nature>
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</natures>
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</projectDescription>
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<?xml version="1.0" encoding="UTF-8" standalone="no"?>
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<?eclipse-pydev version="1.0"?><pydev_project>
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<pydev_property name="org.python.pydev.PYTHON_PROJECT_VERSION">python 2.7</pydev_property>
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<pydev_property name="org.python.pydev.PYTHON_PROJECT_INTERPRETER">Default</pydev_property>
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<pydev_pathproperty name="org.python.pydev.PROJECT_SOURCE_PATH">
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<path>/ceph-osd/hooks</path>
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</pydev_pathproperty>
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</pydev_project>
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Overview
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========
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Ceph is a distributed storage and network file system designed to provide
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excellent performance, reliability, and scalability.
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This charm deploys a Ceph cluster.
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Usage
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=====
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The ceph charm has two pieces of mandatory configuration for which no defaults
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are provided:
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fsid:
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uuid specific to a ceph cluster used to ensure that different
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clusters don't get mixed up - use `uuid` to generate one.
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monitor-secret:
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a ceph generated key used by the daemons that manage to cluster
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to control security. You can use the ceph-authtool command to
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generate one:
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ceph-authtool /dev/stdout --name=mon. --gen-key
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These two pieces of configuration must NOT be changed post bootstrap; attempting
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todo this will cause a reconfiguration error and new service units will not join
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the existing ceph cluster.
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The charm also supports specification of the storage devices to use in the ceph
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cluster.
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osd-devices:
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A list of devices that the charm will attempt to detect, initialise and
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activate as ceph storage.
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This this can be a superset of the actual storage devices presented to
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each service unit and can be changed post ceph bootstrap using `juju set`.
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At a minimum you must provide a juju config file during initial deployment
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with the fsid and monitor-secret options (contents of cepy.yaml below):
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ceph-brolin:
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fsid: ecbb8960-0e21-11e2-b495-83a88f44db01
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monitor-secret: AQD1P2xQiKglDhAA4NGUF5j38Mhq56qwz+45wg==
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osd-devices: /dev/vdb /dev/vdc /dev/vdd /dev/vde
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Specifying the osd-devices to use is also a good idea.
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Boot things up by using:
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juju deploy -n 3 --config ceph.yaml ceph-brolin
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By default the ceph cluster will not bootstrap until 3 service units have been
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deployed and started; this is to ensure that a quorum is achieved prior to adding
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storage devices.
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Technical Bootnotes
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===================
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This charm is currently deliberately inflexible and potentially destructive.
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It is designed to deploy on exactly three machines. Each machine will run mon
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and osd.
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This charm uses the new-style Ceph deployment as reverse-engineered from the
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Chef cookbook at https://github.com/ceph/ceph-cookbooks, although we selected
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a different strategy to form the monitor cluster. Since we don't know the
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names *or* addresses of the machines in advance, we use the relation-joined
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hook to wait for all three nodes to come up, and then write their addresses
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to ceph.conf in the "mon host" parameter. After we initialize the monitor
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cluster a quorum forms quickly, and OSD bringup proceeds.
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The osds use so-called "OSD hotplugging". ceph-disk-prepare is used to create
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the filesystems with a special GPT partition type. udev is set up to mounti
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such filesystems and start the osd daemons as their storage becomes visible to
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the system (or after "udevadm trigger").
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The Chef cookbook above performs some extra steps to generate an OSD
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bootstrapping key and propagate it to the other nodes in the cluster. Since
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all OSDs run on nodes that also run mon, we don't need this and did not
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implement it.
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The charm does not currently implement cephx and its explicitly turned off in
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the configuration generated for ceph.
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See http://ceph.com/docs/master/dev/mon-bootstrap/ for more information on Ceph
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monitor cluster deployment strategies and pitfalls.
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== Minor ==
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* fix tunables (http://tracker.newdream.net/issues/2210)
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* more than 192 PGs
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* fixup data placement in crush to be host not osd driven
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== Public Charm ==
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* cephx support
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* rel: remote MON clients (+client keys for cephx)
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* rel: RADOS gateway (+client key for cephx)
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options:
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fsid:
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type: string
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description: |
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fsid of the ceph cluster. To generate a suitable value use `uuid`
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.
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This configuration element is mandatory and the service will fail on
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install if it is not provided.
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osd-devices:
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type: string
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default: /dev/sdb /dev/sdc /dev/sdd /dev/sde
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description: |
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The devices to format and set up as osd volumes.
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.
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These devices are the range of devices that will be checked for and
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used across all service units.
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source:
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type: string
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default: ppa:ceph-ubuntu/dev
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description: |
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Optional configuration to support use of additional sources such as:
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.
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- ppa:myteam/ppa
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- cloud:folsom-proposed
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- http://my.archive.com/ubuntu main
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.
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The last option should be used in conjunction with the key configuration
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option.
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.
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Note that a minimum ceph version of 0.48.2 is required for use with this
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charm which is NOT provided by the packages in the main Ubuntu archive
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for precise.
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key:
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type: string
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description: |
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Key ID to import to the apt keyring to support use with arbitary source
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configuration from outside of Launchpad archives or PPA's.
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Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0
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Comment: The licensing of this charm is aligned to upstream ceph
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as the ceph upstart integration is distributed as part of the charm.
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Files: *
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Copyright: 2012, Canonical Ltd.
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License: LGPL-2.1
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Files: files/upstart/*
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Copyright: 2004-2010 by Sage Weil <sage@newdream.net>
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License: LGPL-2.1
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License: LGPL-2.1
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On Debian GNU/Linux system you can find the complete text of the
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LGPL-2.1 license in '/usr/share/common-licenses/LGPL-2.1'
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description "Create Ceph client.admin key when possible"
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start on started ceph-mon
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stop on runlevel [!2345]
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task
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exec /usr/sbin/ceph-create-keys --cluster="${cluster:-ceph}" -i "${id:-$(hostname)}"
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description "Ceph hotplug"
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start on block-device-added \
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DEVTYPE=partition \
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ID_PART_ENTRY_TYPE=4fbd7e29-9d25-41b8-afd0-062c0ceff05d
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stop on runlevel [!2345]
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task
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instance $DEVNAME
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exec /usr/sbin/ceph-disk-activate --mount -- "$DEVNAME"
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description "Ceph MON (start all instances)"
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start on starting ceph-mon-all
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stop on runlevel [!2345]
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task
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script
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set -e
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# TODO what's the valid charset for cluster names and mon ids?
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find /var/lib/ceph/mon/ -mindepth 1 -maxdepth 1 -regextype posix-egrep -regex '.*/[a-z0-9]+-[a-z0-9._-]+' -printf '%P\n' \
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| while read f; do
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if [ -e "/var/lib/ceph/mon/$f/done" ]; then
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cluster="${f%%-*}"
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id="${f#*-}"
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initctl emit ceph-mon cluster="$cluster" id="$id"
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fi
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done
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end script
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description "Ceph monitor (all instances)"
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start on (local-filesystems and net-device-up IFACE!=lo)
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stop on runlevel [!2345]
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description "Ceph MON"
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start on ceph-mon
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stop on runlevel [!2345] or stopping ceph-mon-all
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respawn
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respawn limit 5 30
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pre-start script
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set -e
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test -x /usr/bin/ceph-mon || { stop; exit 0; }
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test -d "/var/lib/ceph/mon/${cluster:-ceph}-$id" || { stop; exit 0; }
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install -d -m0755 /var/run/ceph
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end script
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instance ${cluster:-ceph}/$id
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export cluster
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export id
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# this breaks oneiric
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#usage "cluster = name of cluster (defaults to 'ceph'); id = monitor instance id"
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exec /usr/bin/ceph-mon --cluster="${cluster:-ceph}" -i "$id" -f
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description "Ceph OSD"
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start on ceph-osd
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stop on runlevel [!2345]
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respawn
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respawn limit 5 30
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pre-start script
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set -e
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test -x /usr/bin/ceph-osd || { stop; exit 0; }
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test -d "/var/lib/ceph/osd/${cluster:-ceph}-$id" || { stop; exit 0; }
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install -d -m0755 /var/run/ceph
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# update location in crush; put in some suitable defaults on the
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# command line, ceph.conf can override what it wants
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location="$(ceph-conf --cluster="${cluster:-ceph}" --name="osd.$id" --lookup osd_crush_location || :)"
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weight="$(ceph-conf --cluster="$cluster" --name="osd.$id" --lookup osd_crush_weight || :)"
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ceph \
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--cluster="${cluster:-ceph}" \
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--name="osd.$id" \
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--keyring="/var/lib/ceph/osd/${cluster:-ceph}-$id/keyring" \
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osd crush set \
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-- \
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"$id" "osd.$id" "${weight:-1}" \
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pool=default \
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host="$(hostname -s)" \
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$location \
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|| :
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end script
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instance ${cluster:-ceph}/$id
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export cluster
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export id
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exec /usr/bin/ceph-osd --cluster="${cluster:-ceph}" -i "$id" -f
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#
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# Copyright 2012 Canonical Ltd.
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#
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# Authors:
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# James Page <james.page@canonical.com>
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# Paul Collins <paul.collins@canonical.com>
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#
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import json
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import subprocess
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import time
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import utils
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import os
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QUORUM = ['leader', 'peon']
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def is_quorum():
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asok = "/var/run/ceph/ceph-mon.{}.asok".format(utils.get_unit_hostname())
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cmd = [
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"ceph",
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"--admin-daemon",
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asok,
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"mon_status"
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]
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if os.path.exists(asok):
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try:
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result = json.loads(subprocess.check_output(cmd))
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except subprocess.CalledProcessError:
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return False
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except ValueError:
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# Non JSON response from mon_status
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return False
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if result['state'] in QUORUM:
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return True
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else:
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return False
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else:
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return False
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def wait_for_quorum():
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while not is_quorum():
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time.sleep(3)
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def add_bootstrap_hint(peer):
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asok = "/var/run/ceph/ceph-mon.{}.asok".format(utils.get_unit_hostname())
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cmd = [
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"ceph",
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"--admin-daemon",
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asok,
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"add_bootstrap_peer_hint",
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peer
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]
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if os.path.exists(asok):
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# Ignore any errors for this call
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subprocess.call(cmd)
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def is_osd_disk(dev):
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try:
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info = subprocess.check_output(['sgdisk', '-i', '1', dev])
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info = info.split("\n") # IGNORE:E1103
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for line in info:
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if line.startswith(
|
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'Partition GUID code: 4FBD7E29-9D25-41B8-AFD0-062C0CEFF05D'
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):
|
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return True
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except subprocess.CalledProcessError:
|
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pass
|
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return False
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@ -0,0 +1 @@
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hooks.py
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|
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@ -0,0 +1,145 @@
|
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#!/usr/bin/python
|
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|
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#
|
||||
# Copyright 2012 Canonical Ltd.
|
||||
#
|
||||
# Authors:
|
||||
# James Page <james.page@ubuntu.com>
|
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#
|
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|
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import glob
|
||||
import os
|
||||
import subprocess
|
||||
import shutil
|
||||
import sys
|
||||
|
||||
import ceph
|
||||
import utils
|
||||
|
||||
|
||||
def install_upstart_scripts():
|
||||
for x in glob.glob('files/upstart/*.conf'):
|
||||
shutil.copy(x, '/etc/init/')
|
||||
|
||||
|
||||
def install():
|
||||
utils.juju_log('INFO', 'Begin install hook.')
|
||||
utils.configure_source()
|
||||
utils.install('ceph', 'gdisk')
|
||||
install_upstart_scripts()
|
||||
utils.juju_log('INFO', 'End install hook.')
|
||||
|
||||
|
||||
def emit_cephconf():
|
||||
cephcontext = {
|
||||
'mon_hosts': ' '.join(get_mon_hosts()),
|
||||
'fsid': get_fsid()
|
||||
}
|
||||
|
||||
with open('/etc/ceph/ceph.conf', 'w') as cephconf:
|
||||
cephconf.write(utils.render_template('ceph.conf', cephcontext))
|
||||
|
||||
|
||||
def config_changed():
|
||||
utils.juju_log('INFO', 'Begin config-changed hook.')
|
||||
|
||||
utils.juju_log('INFO', 'Monitor hosts are ' + repr(get_mon_hosts()))
|
||||
|
||||
if get_fsid():
|
||||
utils.juju_log('INFO', 'cluster fsid detected, rescanning disks')
|
||||
emit_cephconf()
|
||||
for dev in utils.config_get('osd-devices').split(' '):
|
||||
osdize(dev)
|
||||
subprocess.call(['udevadm', 'trigger',
|
||||
'--subsystem-match=block', '--action=add'])
|
||||
|
||||
utils.juju_log('INFO', 'End config-changed hook.')
|
||||
|
||||
|
||||
def get_mon_hosts():
|
||||
hosts = []
|
||||
hosts.append('{}:6789'.format(utils.get_host_ip()))
|
||||
|
||||
for relid in utils.relation_ids('mon'):
|
||||
for unit in utils.relation_list(relid):
|
||||
hosts.append(
|
||||
'{}:6789'.format(utils.get_host_ip(
|
||||
utils.relation_get('private-address',
|
||||
unit, relid)))
|
||||
)
|
||||
|
||||
hosts.sort()
|
||||
return hosts
|
||||
|
||||
|
||||
def get_fsid():
|
||||
for relid in utils.relation_ids('mon'):
|
||||
for unit in utils.relation_list(relid):
|
||||
fsid = utils.relation_get('fsid',
|
||||
unit, relid)
|
||||
if fsid != "":
|
||||
return fsid
|
||||
return None
|
||||
|
||||
|
||||
def osdize(dev):
|
||||
# XXX hack for instances
|
||||
subprocess.call(['umount', '/mnt'])
|
||||
|
||||
if ceph.is_osd_disk(dev):
|
||||
utils.juju_log('INFO',
|
||||
'Looks like {} is already an OSD, skipping.'
|
||||
.format(dev))
|
||||
return
|
||||
|
||||
if subprocess.call(['grep', '-wqs', dev + '1', '/proc/mounts']) == 0:
|
||||
utils.juju_log('INFO',
|
||||
'Looks like {} is in use, skipping.'.format(dev))
|
||||
return
|
||||
|
||||
if os.path.exists(dev):
|
||||
subprocess.call(['ceph-disk-prepare', dev])
|
||||
|
||||
|
||||
def mon_relation():
|
||||
utils.juju_log('INFO', 'Begin mon-relation hook.')
|
||||
|
||||
if get_fsid():
|
||||
utils.juju_log('INFO', 'mon has provided fsid - scanning disks')
|
||||
emit_cephconf()
|
||||
for dev in utils.config_get('osd-devices').split(' '):
|
||||
osdize(dev)
|
||||
subprocess.call(['udevadm', 'trigger',
|
||||
'--subsystem-match=block', '--action=add'])
|
||||
else:
|
||||
utils.juju_log('INFO',
|
||||
'mon cluster has not yet provided fsid')
|
||||
|
||||
utils.juju_log('INFO', 'End mon-relation hook.')
|
||||
|
||||
|
||||
def upgrade_charm():
|
||||
utils.juju_log('INFO', 'Begin upgrade-charm hook.')
|
||||
if get_fsid():
|
||||
emit_cephconf()
|
||||
install_upstart_scripts()
|
||||
utils.juju_log('INFO', 'End upgrade-charm hook.')
|
||||
|
||||
|
||||
def start():
|
||||
# In case we're being redeployed to the same machines, try
|
||||
# to make sure everything is running as soon as possible.
|
||||
subprocess.call(['udevadm', 'trigger',
|
||||
'--subsystem-match=block', '--action=add'])
|
||||
|
||||
|
||||
utils.do_hooks({
|
||||
'config-changed': config_changed,
|
||||
'install': install,
|
||||
'mon-relation-departed': mon_relation,
|
||||
'mon-relation-changed': mon_relation,
|
||||
'start': start,
|
||||
'upgrade-charm': upgrade_charm,
|
||||
})
|
||||
|
||||
sys.exit(0)
|
||||
|
|
@ -0,0 +1 @@
|
|||
hooks.py
|
||||
|
|
@ -0,0 +1 @@
|
|||
hooks.py
|
||||
|
|
@ -0,0 +1 @@
|
|||
hooks.py
|
||||
|
|
@ -0,0 +1 @@
|
|||
hooks.py
|
||||
|
|
@ -0,0 +1 @@
|
|||
hooks.py
|
||||
|
|
@ -0,0 +1 @@
|
|||
hooks.py
|
||||
|
|
@ -0,0 +1,163 @@
|
|||
|
||||
#
|
||||
# Copyright 2012 Canonical Ltd.
|
||||
#
|
||||
# Authors:
|
||||
# James Page <james.page@ubuntu.com>
|
||||
# Paul Collins <paul.collins@canonical.com>
|
||||
#
|
||||
|
||||
import os
|
||||
import subprocess
|
||||
import socket
|
||||
import sys
|
||||
|
||||
|
||||
def do_hooks(hooks):
|
||||
hook = os.path.basename(sys.argv[0])
|
||||
|
||||
try:
|
||||
hooks[hook]()
|
||||
except KeyError:
|
||||
juju_log('INFO',
|
||||
"This charm doesn't know how to handle '{}'.".format(hook))
|
||||
|
||||
|
||||
def install(*pkgs):
|
||||
cmd = [
|
||||
'apt-get',
|
||||
'-y',
|
||||
'install'
|
||||
]
|
||||
for pkg in pkgs:
|
||||
cmd.append(pkg)
|
||||
subprocess.check_call(cmd)
|
||||
|
||||
TEMPLATES_DIR = 'templates'
|
||||
|
||||
try:
|
||||
import jinja2
|
||||
except ImportError:
|
||||
install('python-jinja2')
|
||||
import jinja2
|
||||
|
||||
|
||||
def render_template(template_name, context, template_dir=TEMPLATES_DIR):
|
||||
templates = jinja2.Environment(
|
||||
loader=jinja2.FileSystemLoader(template_dir)
|
||||
)
|
||||
template = templates.get_template(template_name)
|
||||
return template.render(context)
|
||||
|
||||
|
||||
def configure_source():
|
||||
source = config_get('source')
|
||||
if (source.startswith('ppa:') or
|
||||
source.startswith('cloud:') or
|
||||
source.startswith('http:')):
|
||||
cmd = [
|
||||
'add-apt-repository',
|
||||
source
|
||||
]
|
||||
subprocess.check_call(cmd)
|
||||
if source.startswith('http:'):
|
||||
key = config_get('key')
|
||||
cmd = [
|
||||
'apt-key',
|
||||
'import',
|
||||
key
|
||||
]
|
||||
subprocess.check_call(cmd)
|
||||
cmd = [
|
||||
'apt-get',
|
||||
'update'
|
||||
]
|
||||
subprocess.check_call(cmd)
|
||||
|
||||
# Protocols
|
||||
TCP = 'TCP'
|
||||
UDP = 'UDP'
|
||||
|
||||
|
||||
def expose(port, protocol='TCP'):
|
||||
cmd = [
|
||||
'open-port',
|
||||
'{}/{}'.format(port, protocol)
|
||||
]
|
||||
subprocess.check_call(cmd)
|
||||
|
||||
|
||||
def juju_log(severity, message):
|
||||
cmd = [
|
||||
'juju-log',
|
||||
'--log-level', severity,
|
||||
message
|
||||
]
|
||||
subprocess.check_call(cmd)
|
||||
|
||||
|
||||
def relation_ids(relation):
|
||||
cmd = [
|
||||
'relation-ids',
|
||||
relation
|
||||
]
|
||||
return subprocess.check_output(cmd).split() # IGNORE:E1103
|
||||
|
||||
|
||||
def relation_list(rid):
|
||||
cmd = [
|
||||
'relation-list',
|
||||
'-r', rid,
|
||||
]
|
||||
return subprocess.check_output(cmd).split() # IGNORE:E1103
|
||||
|
||||
|
||||
def relation_get(attribute, unit=None, rid=None):
|
||||
cmd = [
|
||||
'relation-get',
|
||||
]
|
||||
if rid:
|
||||
cmd.append('-r')
|
||||
cmd.append(rid)
|
||||
cmd.append(attribute)
|
||||
if unit:
|
||||
cmd.append(unit)
|
||||
return subprocess.check_output(cmd).strip() # IGNORE:E1103
|
||||
|
||||
|
||||
def relation_set(**kwargs):
|
||||
cmd = [
|
||||
'relation-set'
|
||||
]
|
||||
for k, v in kwargs.items():
|
||||
cmd.append('{}={}'.format(k, v))
|
||||
subprocess.check_call(cmd)
|
||||
|
||||
|
||||
def unit_get(attribute):
|
||||
cmd = [
|
||||
'unit-get',
|
||||
attribute
|
||||
]
|
||||
return subprocess.check_output(cmd).strip() # IGNORE:E1103
|
||||
|
||||
|
||||
def config_get(attribute):
|
||||
cmd = [
|
||||
'config-get',
|
||||
attribute
|
||||
]
|
||||
return subprocess.check_output(cmd).strip() # IGNORE:E1103
|
||||
|
||||
|
||||
def get_unit_hostname():
|
||||
return socket.gethostname()
|
||||
|
||||
|
||||
def get_host_ip(hostname=unit_get('private-address')):
|
||||
cmd = [
|
||||
'dig',
|
||||
'+short',
|
||||
hostname
|
||||
]
|
||||
return subprocess.check_output(cmd).strip() # IGNORE:E1103
|
||||
|
|
@ -0,0 +1,12 @@
|
|||
name: ceph-osd
|
||||
summary: Highly scalable distributed storage - OSD nodes
|
||||
maintainer: James Page <james.page@ubuntu.com>
|
||||
description: |
|
||||
Ceph is a distributed storage and network file system designed to provide
|
||||
excellent performance, reliability, and scalability.
|
||||
.
|
||||
This charm provides the OSD personality for expanding storage nodes within
|
||||
a ceph deployment.
|
||||
requires:
|
||||
mon:
|
||||
interface: ceph-osd
|
||||
|
|
@ -0,0 +1,17 @@
|
|||
[global]
|
||||
auth supported = none
|
||||
keyring = /etc/ceph/$cluster.$name.keyring
|
||||
mon host = {{ mon_hosts }}
|
||||
fsid = {{ fsid }}
|
||||
|
||||
[mon]
|
||||
keyring = /var/lib/ceph/mon/$cluster-$id/keyring
|
||||
|
||||
[mds]
|
||||
keyring = /var/lib/ceph/mds/$cluster-$id/keyring
|
||||
|
||||
[osd]
|
||||
keyring = /var/lib/ceph/osd/$cluster-$id/keyring
|
||||
osd journal size = 1000
|
||||
filestore xattr use omap = true
|
||||
|
||||
Loading…
Reference in New Issue