Centos8部署Ceph集群对接OpenStack(U版本)

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

准备两台Centos8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

iphostname192.168.29.148controller192.168.29.149computer

配置openstack可参考:https://blog.csdn.net/xixixilalalahaha/article/details/109215697 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ceph源

[root@controller ~]# yum install centos-release-ceph-octopus.noarch -y [root@computer ~]# yum install centos-release-ceph-octopus.noarch -y

安装ceph组件

[root@controller ~]# yum install cephadm -y [root@computer ~]# yum install ceph -y

computer结点安装libvirt

[root@computer ~]# yum install libvirt -y

部署ceph集群

创建集群

[root@controller ~]# mkdir -p /etc/ceph [root@controller ~]# cd /etc/ceph/ [root@controller ceph]# cephadm boostrap --mon-ip 192.168.29.148 [root@controller ceph]# ceph status [root@controller ceph]# cephadm install ceph-common [root@controller ceph]# ssh-copy-id -f -i /etc/ceph/ceph.pub root@computer

修改配置

[root@controller ceph]# ceph config set mon public_network 192.168.29.0/24

添加主机

[root@controller ceph]# ceph orch host add computer [root@controller ceph]# ceph orch host ls

初始化集群监控

[root@controller ceph]# ceph orch host label add controller mon [root@controller ceph]# ceph orch host label add computer mon [root@controller ceph]# ceph orch apply mon label:mon [root@controller ceph]# ceph orch daemon add mon computer:192.168.29.149

创建OSD

[root@controller ceph]# ceph orch daemon add osd controller:/dev/nvme0n2 [root@controller ceph]# ceph orch daemon add osd computer:/dev/nvme0n3

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 #设置自启动 [root@controller ceph]# ceph osd pool application enable vms 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

ceph集群与openstack对接

创建cinder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'

设置密钥

[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 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 <secret ephemeral='no' private='no'> <uuid>1fad1f90-63fb-4c15-bfc3-366c6559c1fe </uuid> <usage type='ceph'> <name>client.cinder secret</name> </usage> </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 = 192.168.29.148 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,VIR_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

重启服务

[root@computer ~]# systemctl stop libvirtd openstack-nova-compute [root@computer ~]# systemctl start libvirtd openstack-nova-compute