基于ceph rbd+corosync+pacemaker HA-NFS文件共享
1、 架构图
2、 环境准备
1.1 IP规划
两台支持rbd的nfs-server主机：10.20.18.97 10.20.18.11
Vip:10.20.18.123 设置在同一网段
1.2 软件安装
# yum install pacemaker corosync cluster-glue resource-agents # rpm -ivh crmsh-2.1-1.6.x86_64.rpm –nodeps
1.3 ssh互信略
1.4 ntp配置略
1.5 配置hosts(两台)
# vi /etc/hosts 10.20.18.97 SZB-L0005908 10.20.18.111 SZB-L0005469
3 Corosync配置（两台）
3.1 配置corosync
# mv /etc/corosync/corosync.conf.example /etc/corosync/corosync.conf
# vi /etc/corosync/corosync.conf
# Please read the corosync.conf.5 manual page
compatibility: whitetank
totem {
version: 2
secauth: off
threads: 0
interface {
ringnumber: 0
bindnetaddr: 10.20.18.111
mcastaddr: 226.94.1.1
mcastport: 5405
ttl: 1
}
}
logging {
fileline: off
to_stderr: no
to_logfile: yes
to_syslog: yes
logfile: /var/log/cluster/corosync.log
debug: off
timestamp: on
logger_subsys {
subsys: AMF
debug: off
}
}
amf {
mode: disabled
}
service {
ver: 0
name: pacemaker
}
aisexec {
user: root
group: root
}
Bindnetaddr 为节点ip
Mcastaddr 为合法的组播地址，随便填
3.2 启动corosync
# service corosync start
3.3 参数设置（目的是因为只有2个节点，忽略法定票数）
# crm configure property stonith-enabled=false # sudo crm configure property no-quorum-policy=ignore
3.4 查看节点状态（都online就ok）
# crm_mon -1 Last updated: Fri May 22 15:56:37 2015 Last change: Fri May 22 13:09:33 2015 via crmd on SZB-L0005469 Stack: classic openais (with plugin) Current DC: SZB-L0005908 - partition with quorum Version: 1.1.10-14.el6-368c726 2 Nodes configured, 2 expected votes 0 Resources configured Online: [ SZB-L0005469 SZB-L0005908 ]
4. Pacemaker资源配置
说明: Pacemaker主要管理资源，本实验中为了搭建rbd-nfs，所以会对rbd map 、mount 、nfs-export、vip等资源进行管理。简而言之，自动实现rbd到nfs共享。
4.1 格式化rbd
(本实验创建的镜像为share/share2),只需在一个节点做一次。
# rados mkpool share # rbd create share/share2 –size 1024 # rbd map share/share2 # rbd showmapped # mkfs.xfs /dev/rbd1 # rbd unmap share/share2
4.2 资源pacemaker配置
4.2.1 准备rbd.in脚本
(拷贝ceph源码中脚本src/ocf/rbd.in到下面目录，所有节点都做)
# mkdir /usr/lib/ocf/resource.d/ceph # cd /usr/lib/ocf/resource.d/ceph/ # chmod + rbd.in
注：下面配置单个节点做
4.2.2 配置rbd map
(可以用crm configure edit命令直接copy下面内容)
# primitive p_rbd_map_1 ocf:ceph:rbd.in \ params user=admin pool=share name=share2 cephconf="/etc/ceph/ceph.conf" \ op monitor interval=10s timeout=20s
4.2.3 mount 文件系统
# primitive p_fs_rbd_1 Filesystem \ params directory="/mnt/share2" fstype=xfs device="/dev/rbd/share/share2" fast_stop=no \ op monitor interval=20s timeout=40s \ op start interval=0 timeout=60s \ op stop interval=0 timeout=60s
4.2.4 nfs-export
primitive p_export_rbd_1 exportfs \ params directory="/mnt/share2" clientspec="10.20.0.0/24" options="rw,async,no_subtree_check,no_root_squash" fsid=1 \ op monitor interval=10s timeout=20s \
4.2.5 VIP 配置
primitive p_vip_1 IPaddr \ params ip=10.20.18.123 cidr_netmask=24 \ op monitor interval=5
4.2.6 nfs 服务配置
primitive p_rpcbind lsb:rpcbind \ op monitor interval=10s timeout=30s primitive p_nfs_server lsb:nfs \ op monitor interval=10s timeout=30s
4.3 源组配置
group g_nfs p_rpcbind p_nfs_server group g_rbd_share_1 p_rbd_map_1 p_fs_rbd_1 p_export_rbd_1 p_vip_1 clone clo_nfs g_nfs \ meta globally-unique="false" target-role="Started"
4.4 资源定位规则
location l_g_rbd_share_1 g_rbd_share_1 inf: SZB-L0005469
4.5 查看总的配置(可略过)
# crm configure edit node SZB-L0005469 node SZB-L0005908 primitive p_export_rbd_1 exportfs \ params directory="/mnt/share2" clientspec="10.20.0.0/24" options="rw,async,no_subtree_check,no_root_squash" fsid=1 \ op monitor interval=10s timeout=20s \ op start interval=0 timeout=40s primitive p_fs_rbd_1 Filesystem \ params directory="/mnt/share2" fstype=xfs device="/dev/rbd/share/share2" fast_stop=no \ op monitor interval=20s timeout=40s \ op start interval=0 timeout=60s \ op stop interval=0 timeout=60s primitive p_nfs_server lsb:nfs \ op monitor interval=10s timeout=30s primitive p_rbd_map_1 ocf:ceph:rbd.in \ params user=admin pool=share name=share2 cephconf="/etc/ceph/ceph.conf" \ op monitor interval=10s timeout=20s primitive p_rpcbind lsb:rpcbind \ op monitor interval=10s timeout=30s primitive p_vip_1 IPaddr \ params ip=10.20.18.123 cidr_netmask=24 \ op monitor interval=5 group g_nfs p_rpcbind p_nfs_server group g_rbd_share_1 p_rbd_map_1 p_fs_rbd_1 p_export_rbd_1 p_vip_1 clone clo_nfs g_nfs \ meta globally-unique=false target-role=Started location l_g_rbd_share_1 g_rbd_share_1 inf: SZB-L0005469 property cib-bootstrap-options: \ dc-version=1.1.10-14.el6-368c726 \ cluster-infrastructure="classic openais (with plugin)" \ symmetric-cluster=true \ stonith-enabled=false \ no-quorum-policy=ignore \ expected-quorum-votes=2 rsc_defaults rsc_defaults-options: \ resource-stickiness=0 \ migration-threshold=1
4.6 重启corosync服务(两台)
# service corosync restart # crm_mon -1 Last updated: Fri May 22 16:55:14 2015 Last change: Fri May 22 16:52:04 2015 via crmd on SZB-L0005469 Stack: classic openais (with plugin) Current DC: SZB-L0005908 - partition with quorum Version: 1.1.10-14.el6-368c726 2 Nodes configured, 2 expected votes 8 Resources configured Online: [ SZB-L0005469 SZB-L0005908 ] Resource Group: g_rbd_share_1 p_rbd_map_1 (ocf::ceph:rbd.in): Started SZB-L0005469 p_fs_rbd_1 (ocf::heartbeat:Filesystem): Started SZB-L0005469 p_export_rbd_1 (ocf::heartbeat:exportfs): Started SZB-L0005469 p_vip_1 (ocf::heartbeat:IPaddr): Started SZB-L0005469 Clone Set: clo_nfs [g_nfs] Started: [ SZB-L0005469 SZB-L0005908 ]
5 测试
5.1 查看挂载点（通过虚拟Ip）
# showmount -e 10.20.18.123 Export list for 10.20.18.123: /mnt/share2 10.20.0.0/24
5. 2 故障转移测试
# service corosync stop # SZB-L0005469 执行 # crm_mon -1 # SZB-L0005908 执行 Last updated: Fri May 22 17:14:31 2015 Last change: Fri May 22 16:52:04 2015 via crmd on SZB-L0005469 Stack: classic openais (with plugin) Current DC: SZB-L0005908 - partition WITHOUT quorum Version: 1.1.10-14.el6-368c726 2 Nodes configured, 2 expected votes 8 Resources configured Online: [ SZB-L0005908 ] OFFLINE: [ SZB-L0005469 ] Resource Group: g_rbd_share_1 p_rbd_map_1 (ocf::ceph:rbd.in): Started SZB-L0005908 p_fs_rbd_1 (ocf::heartbeat:Filesystem): Started SZB-L0005908 p_export_rbd_1 (ocf::heartbeat:exportfs): Started SZB-L0005908 p_vip_1 (ocf::heartbeat:IPaddr): Started SZB-L0005908 Clone Set: clo_nfs [g_nfs] Started: [ SZB-L0005908 ] Stopped: [ SZB-L0005469 ]
说明此时服务由SZB-L0005908接替。大功告成！
参考资料
1. http://www.sebastien-han.fr/blog/2012/07/06/nfs-over-rbd/
2. http://wenku.baidu.com/link?url=KAzGeet-hY4Fbd7BnoyK-l3HifQWv4XK_YWeDF7KEZ-oGROnCzc8YCq0ims5zPIni2ekjlsDN2XHP2VltThlYA6rpHuv62dwehscf_9gMKS&pn=50