简介
Linux持续不断进军可扩展计算空间，特别是可扩展存储空间，Ceph 最近加入到 Linux 中令人印象深刻的文件系统备选行列，它是一个分布式文件系统，能够在维护 POSIX 兼容性的同时加入了复制和容错功能
Ceph 生态系统架构可以划分为四部分：
1、Clients：客户端（数据用户）
2、cmds：Metadata server cluster，元数据服务器（缓存和同步分布式元数据）
3、cosd：Object storage cluster，对象存储集群（将数据和元数据作为对象存储，执行其他关键职能）
4、cmon：Cluster monitors，集群监视器（执行监视功能）
前期准备
准备三台Centos7虚拟机，配置IP地址和hostname，同步系统时间，关闭防火墙和selinux，修改IP地址和hostname映射，每台虚拟机添加一块硬盘
| ip | hostname |
|---|---|
| 192.168.29.145 | controller |
| 192.168.29.146 | computer |
| 192.168.29.147 | storager |
配置openstack可参考:https://blog.51cto.com/14832653/2516210
注：若已经创建openstack集群，需要先把实例，镜像和卷进行删除
安装epel和ceph源
[root@controller ~]# yum install epel-release centos-release-ceph-luminous -y
[root@computer ~]# yum install epel-release centos-release-ceph-luminous -y
[root@storager ~]# yum install epel-release centos-release-ceph-luminous -y配置ceph源
[root@controller ~]# vi /etc/yum.repos.d/ceph.repo
[root@computer ~]# vi /etc/yum.repos.d/ceph.repo
[root@storager ~]# vi /etc/yum.repos.d/ceph.repo
[Ceph]
name=Ceph packages for $basearch
baseurl=http://mirrors.163.com/ceph/rpm-jewel/el7/x86_64
enabled=1
gpgcheck=0
type=rpm-md
priority=1
[Ceph-noarch]
name=Ceph noarch packages
baseurl=http://mirrors.163.com/ceph/rpm-jewel/el7/noarch
enabled=1
gpgcheck=0
type=rpm-md
priority=1
[ceph-source]
name=Ceph source packages
baseurl=http://mirrors.163.com/ceph/rpm-jewel/el7/SRPMS
enabled=1
gpgcheck=0
type=rpm-md
priority=1安装ceph组件
[root@controller ~]# yum install ceph ceph-deploy -y
[root@computer ~]# yum install ceph ceph-deploy -y
[root@storager ~]# yum install ceph ceph-deploy -ycomputer结点安装libvirt
[root@computer ~]# yum install libvirt -y部署ceph集群
创建集群
[root@controller ~]# cd /etc/ceph/
[root@controller ceph]# ceph-deploy new controller computer storager修改配置文件
[root@controller ceph]# vi ceph.conf
[global]
fsid = e5288fdd-d279-414b-8391-e440d82cc925
mon_initial_members = controller, computer, storager
mon_host = 192.168.29.145,192.168.29.146,192.168.29.147
auth_cluster_required = cephx
auth_service_required = cephx
auth_client_required = cephx
#设置三个备份
osd_pool_default_size = 3
#设置集群网段
public_network = 192.168.29.0/24初始化集群监控
[root@controller ceph]# ceph-deploy mon create-initial 创建OSD
[root@controller ceph]# ceph-deploy disk zap controller:sdb computer:sdb storager:sdb
[root@controller ceph]# ceph-deploy osd create controller:sdb computer:sdb storager:sdb下发admin密钥
[root@controller ceph]# ceph-deploy admin controller computer storager添加执行权限
[root@controller ceph]# chmod +x /etc/ceph/ceph.client.admin.keyring
[root@computer ceph]# chmod +x /etc/ceph/ceph.client.admin.keyring
[root@storager ceph] # chmod +x /etc/ceph/ceph.client.admin.keyring 创建mgr管理
[root@controller ceph]# ceph-deploy mgr create controller computer storager查看集群状态
[root@controller ceph]# ceph -s查看集群容量
[root@controller ceph]# ceph df创建pool
[root@controller ceph]# ceph osd pool create volumes 64
[root@controller ceph]# ceph osd pool create vms 64
[root@controller ceph]# ceph osd pool create images 64
#设置自启动
[root@controller ceph]# ceph osd pool application enable vms mon
[root@controller ceph]# ceph osd pool application enable images mon
[root@controller ceph]# ceph osd pool application enable volumes mon查看mon,osd,pool状态
[root@controller ceph]# ceph mon stat
[root@controller ceph]# ceph osd status
[root@controller ceph]# ceph osd lspools查看pool情况
[root@controller ~]# rbd ls vms
[root@controller ~]# rbd ls volumes
[root@controller ~]# rbd ls imagesceph集群与openstack对接
创建cinder和glance并设置权限
[root@controller ceph]# ceph auth get-or-create client.cinder mon 'allow r' osd 'allow class-read object_prefix rbd_children,allow rwx pool=volumes,allow rwx pool=vms,allow rx pool=images'
[root@controller ceph]# ceph auth get-or-create client.glance mon 'allow r' osd 'allow class-read object_prefix rbd_children,allow rwx pool=images'设置密钥
[root@controller ceph]# ceph auth get-or-create client.glance |tee /etc/ceph/ceph.client.glance.keyring
[root@controller ceph]# ceph auth get-or-create client.cinder | tee /etc/ceph/ceph.client.cinder.keyring
#传送密钥到computer
[root@controller ~]# ceph auth get-key client.cinder > client.cinder.key
[root@controller ~]# scp client.cinder.key computer:/root/
#修改权限
[root@controller ceph]# chown glance.glance /etc/ceph/ceph.client.glance.keyring
[root@controller ceph]# chown cinder.cinder /etc/ceph/ceph.client.cinder.keyring设置密钥
#computer生成uuid
[root@computer ~]#uuidgen
1fad1f90-63fb-4c15-bfc3-366c6559c1fe
#创建密钥文件
[root@computer ~]# vi secret.xml
1fad1f90-63fb-4c15-bfc3-366c6559c1fe
client.cinder secret
#定义密钥
virsh secret-define --file secret.xml
#设置密钥
virsh secret-set-value --secret 1fad1f90-63fb-4c15-bfc3-366c6559c1fe --base64 $(cat client.cinder.key) && rm -rf client.cinder.key secret.xml设置对接glance模块
修改配置文件
[root@controller ~]# vi /etc/glance/glance-api.conf
[glance_store]
#默认配置需要注释掉
stores = rbd
default_store = rbd
rbd_store_chunk_size = 8
rbd_store_pool = images
rbd_store_user = glance
rbd_store_ceph_conf = /etc/ceph/ceph.conf重启服务
[root@controller ~]# systemctl restart openstack-glance-api设置对接cinder模块
修改配置文件
[root@controller ~]# vi /etc/cinder/cinder.conf
[default]
rpc_backend = rabbit
auth_strategy = keystone
my_ip = 192.168.29.145
enabled_backends = ceph
[ceph]
default_volume_type= ceph
glance_api_version = 2
volume_driver = cinder.volume.drivers.rbd.RBDDriver
volume_backend_name = ceph
rbd_pool = volumes
rbd_ceph_conf = /etc/ceph/ceph.conf
rbd_flatten_volume_from_snapshot = false
rbd_max_clone_depth = 5
rbd_store_chunk_size = 4
rados_connect_timeout = -1
rbd_user = cinder
#对应computer创建的uuid
rbd_secret_uuid = 1fad1f90-63fb-4c15-bfc3-366c6559c1fe 同步数据库
#若已经有数据库，对数据库进行删除并重新创建和同步
[root@controller ~]# su -s /bin/sh -c "cinder-manage db sync" cinder重启服务
[root@controller ~]# systemctl restart openstack-cinder-api.service openstack-cinder-scheduler.service openstack-cinder-volume.service设置ceph的类型和存储类型
[root@controller ~]# source admin-openrc
[root@controller ~]# cinder type-create ceph
[root@controller ~]# cinder type-key ceph set volume_backend_name=ceph对接nova-compute模块
computer结点修改配置文件
[root@computer ~]# vi /etc.nova/nova.conf
[libvirt]
virt_type = qemu
inject_password = true
inject_partition = -1
images_type = rbd
images_rbd_pool = vms
images_rbd_ceph_conf = /etc/ceph/ceph.conf
rbd_user = cinder
rbd_secret_uuid = 1fad1f90-63fb-4c15-bfc3-366c6559c1fe
disk_cachemodes = "network=writeback"
live_migration_flag = "VIR_MIGRATE_UNDEFINE_SOURCE,VIR_MIGRATE_PEER2PEER,V IR_MIGRATE_LIVE,VIR_MIGRATE_PERSIST_DEST,VIR_MIGRATE_TUNNELLED"
hw_disk_discard = unmap[root@computer ~]# vi /etc/ceph/ceph.conf
[client]
rbd cache=true
rbd cache writethrough until flush=true
admin socket = /var/run/ceph/guests/$cluster-$type.$id.$pid.$cctid.asok
log file = /var/log/qemu/qemu-guest-$pid.log
rbd concurrent management ops = 20创建日志目录
[root@computer ~]# mkdir -p /var/run/ceph/guests/ /var/log/qemu/
[root@computer ~]# chown 777 -R /var/run/ceph/guests/ /var/log/qemu/controller下发密钥
[root@controller ~]# cd /etc/ceph
[root@controller ~]# scp ceph.client.cinder.keyring root@computer:/etc/ceph
[root@controller ~]# scp ceph.client.cinder.keyring root@storager:/etc/ceph重启服务
[root@computer ~]# systemctl stop libvirtd openstack-nova-compute
[root@computer ~]# systemctl start libvirtd openstack-nova-compute