内容简介：1、搭建GlusterFS复制卷(使用至少2个存储节点)2、配置Keepalived管理GlusterFS主从存储节点3、配置Keepalived浮动IP(VIP)对外提供存储服务
GlusterFS分布式存储高可用方案设计
1、搭建GlusterFS复制卷(使用至少2个存储节点)
2、配置Keepalived管理GlusterFS主从存储节点
3、配置Keepalived浮动IP(VIP)对外提供存储服务
4、实现存储高可用(即使用两台GlusterFS服务器提供双节点复制卷，并提供快速故障转移，实现存储的持续高可用)
5、可以应用在关键性数据存储业务场景
一、环境准备
| Hostname | ||||
| 172.16.10.10 | data-node-01 | /dev/sdb1 | CentOS7 |
172.16.10.220 说明：用于对外提供存储服务 |
| 172.16.10.11 | data-node-02 | /dev/sdb1 | CentOS7 | |
| 172.16.10.12 | web-node-12 |
/etc/hosts配置
172.16.10.10 data-node-01 172.16.10.11 data-node-02
建立GlusterFS存储挂载点
mkdir -p /glusterfs/storage1 echo "/dev/sdb1 /glusterfs/storage1 xfs defaults 0 0" >> /etc/fstab mount -a
二、安装GlusterFS服务端软件
1、安装gluster源，并安装glusterfs及相关软件包
yum install centos-release-gluster -y yum install glusterfs glusterfs-server glusterfs-cli glusterfs-geo-replication glusterfs-rdma -y
2、客户端安装GlusterFS客户端软件
yum install glusterfs-fuse
3、启动Glusterd服务
systemctl start glusterd
4、在任意一个节点上添加信任节点
gluster peer probe data-node-02 gluster peer probe data-node-01 gluster peer status
5、在任意一个节点上建立复制卷
mkdir /glusterfs/storage1/rep_vol1 gluster volume create rep_vol1 replica 2 data-node-01:/glusterfs/storage1/rep_vol1 data-node-02:/glusterfs/storage1/rep_vol1
6、启动复制卷
gluster volume start rep_vol1
7、查看复制卷状态
gluster volume status gluster volume info
8、客户端测试挂载复制卷
mount -t glusterfs data-node-01:rep_vol1 /data/
9、客户端测试复制卷数据存储
for i in `seq -w 1 3`;do cp -rp /var/log/messages /data/test-$i;done [root@localhost ~]# ls /data/ 111 1.txt 2.txt anaconda-ks.cfg test-1 test-2 test-3
三、安装与配置Keepalived
1、安装Keepalived
yum -y install keepalived
2、启动keepalived服务
systemctl start keepalived
3、主节点keepalived配置
! Configuration File for keepalived
global_defs {
notification_email {
mail@huangming.org
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id GFS_HA_MASTER
vrrp_skip_check_adv_addr
}
vrrp_sync_group GFS_HA_GROUP {
group {
GFS_HA_1
}
}
vrrp_script monitor_glusterfs_status {
script "/etc/keepalived/scripts/monitor_glusterfs_status.sh"
interval 5
fall 3
rise 1
weight 20
}
vrrp_instance GFS_HA_1 {
state BACKUP
interface ens34
virtual_router_id 107
priority 100
advert_int 2
nopreempt
authentication {
auth_type PASS
auth_pass 11112222
}
virtual_ipaddress {
172.16.10.220/24 dev ens34
}
track_script {
monitor_glusterfs_status
}
track_interface {
ens34
}
notify_master "/etc/keepalived/scripts/keepalived_notify.sh master"
notify_backup "/etc/keepalived/scripts/keepalived_notify.sh backup"
notify_fault "/etc/keepalived/scripts/keepalived_notify.sh fault"
notify_stop "/etc/keepalived/scripts/keepalived_notify.sh stop"
}
4、备节点keepalived配置
! Configuration File for keepalived
global_defs {
notification_email {
mail@huangming.org
}
notification_email_from Alexandre.Cassen@firewall.loc
smtp_server 127.0.0.1
smtp_connect_timeout 30
router_id GFS_HA_MASTER
vrrp_skip_check_adv_addr
}
vrrp_sync_group GFS_HA_GROUP {
group {
GFS_HA_1
}
}
vrrp_script monitor_glusterfs_status {
script "/etc/keepalived/scripts/monitor_glusterfs_status.sh"
interval 5
fall 3
rise 1
weight 20
}
vrrp_instance GFS_HA_1 {
state BACKUP
interface ens34
virtual_router_id 107
priority 90
advert_int 2
authentication {
auth_type PASS
auth_pass 11112222
}
virtual_ipaddress {
172.16.10.220/24 dev ens34
}
track_script {
monitor_glusterfs_status
}
track_interface {
ens34
}
notify_master "/etc/keepalived/scripts/keepalived_notify.sh master"
notify_backup "/etc/keepalived/scripts/keepalived_notify.sh backup"
notify_fault "/etc/keepalived/scripts/keepalived_notify.sh fault"
notify_stop "/etc/keepalived/scripts/keepalived_notify.sh stop"
}
5、keepalived vrrp监控脚本
#!/bin/bash
#check glusterfsd and glusterd process
systemctl status glusterd &>/dev/null
if [ $? -eq 0 ];then
systemctl status glusterfsd &>/dev/null
if [ $? -eq 0 ];then
exit 0
else
exit 2
fi
else
systemctl start glusterd &>/dev/null
systemctl stop keepalived &>/dev/null && exit 1
fi
6、keepalived通知脚本(管理Glusterd服务)
#!/bin/bash
#keepalived script for glusterd
master() {
systemctl status glusterd
if [ $? -ne 0 ];then
systemctl start glusterd
else
systemctl restart glusterd
fi
}
backup() {
systemctl status glusterd
if [ $? -ne 0 ];then
systemctl start glusterd
fi
}
case $1 in
master)
master
;;
backup)
backup
;;
fault)
backup
;;
stop)
backup
systemctl restart keepalived
;;
*)
echo $"Usage: $0 {master|backup|fault|stop}"
esac
四、测试Keepalived自动接管GlusterFS服务及存储的可用性
1、重新启动keepalived服务
systemctl restart keepalived.service
2、查看VIP接管情况
## 节点1上
[root@data-node-01 ~]# ip a show dev ens34
3: ens34: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:b2:b5:2a brd ff:ff:ff:ff:ff:ff
inet 172.16.10.10/24 brd 172.16.10.255 scope global ens34
valid_lft forever preferred_lft forever
inet 172.16.10.220/24 scope global secondary ens34
valid_lft forever preferred_lft forever
inet6 fe80::ce9a:ee2e:7b6c:a6bb/64 scope link
valid_lft forever preferred_lft forever
## 节点2上
[root@data-node-02 ~]# ip a show dev ens34
3: ens34: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:ba:42:cf brd ff:ff:ff:ff:ff:ff
inet 172.16.10.11/24 brd 172.16.10.255 scope global ens34
valid_lft forever preferred_lft forever
inet6 fe80::e23:ce0:65c3:ffbf/64 scope link
valid_lft forever preferred_lft forever
3、客户端上使用VIP挂载GlusterFS提供的复制卷，并测试是否可用
mount -t glusterfs 172.16.10.220:rep_vol1 /data/ [root@localhost ~]# ls /data/ 111 1.txt 2.txt anaconda-ks.cfg test test-1 test-2 test-3 [root@localhost ~]# mkdir /data/test [root@localhost ~]# echo 1111 >/data/test/1.txt [root@localhost ~]# ls /data/test 1.txt [root@localhost ~]# cat /data/test/1.txt 1111
查看GluserFS节点复制卷的使用情况
[root@data-node-02 ~]# ls /glusterfs/storage1/rep_vol1/ 111 1.txt 2.txt anaconda-ks.cfg test test-1 test-2 test-3
3、测试GlusterFS服务故障转移
将主节点(节点1)关机或重启，查看GlusterFS服务与VIP是否转移至节点2
[root@data-node-01 ~]# reboot
[root@data-node-02 ~]# ip a show dev ens34
3: ens34: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:ba:42:cf brd ff:ff:ff:ff:ff:ff
inet 172.16.10.11/24 brd 172.16.10.255 scope global ens34
valid_lft forever preferred_lft forever
inet 172.16.10.220/24 scope global secondary ens34
valid_lft forever preferred_lft forever
inet6 fe80::e23:ce0:65c3:ffbf/64 scope link
valid_lft forever preferred_lft forever
[root@data-node-02 ~]# tail -f /var/log/messages
Aug 27 22:56:19 data-node-02 Keepalived_vrrp[2563]: SECURITY VIOLATION - scripts are being executed but script_security not enabled.
Aug 27 22:56:19 data-node-02 Keepalived_vrrp[2563]: Sync group GFS_HA_GROUP has only 1 virtual router(s) - removing
Aug 27 22:56:19 data-node-02 Keepalived_vrrp[2563]: VRRP_Instance(GFS_HA_1) removing protocol VIPs.
Aug 27 22:56:19 data-node-02 Keepalived_vrrp[2563]: Using LinkWatch kernel netlink reflector...
Aug 27 22:56:19 data-node-02 Keepalived_vrrp[2563]: VRRP_Instance(GFS_HA_1) Entering BACKUP STATE
Aug 27 22:56:19 data-node-02 Keepalived_vrrp[2563]: VRRP sockpool: [ifindex(3), proto(112), unicast(0), fd(10,11)]
Aug 27 22:56:19 data-node-02 Keepalived_vrrp[2563]: VRRP_Script(monitor_glusterfs_status) succeeded
Aug 27 22:56:19 data-node-02 kernel: nf_conntrack version 0.5.0 (16384 buckets, 65536 max)
Aug 27 22:56:19 data-node-02 kernel: IPVS: Registered protocols (TCP, UDP, SCTP, AH, ESP)
Aug 27 22:56:19 data-node-02 kernel: IPVS: Connection hash table configured (size=4096, memory=64Kbytes)
Aug 27 22:56:19 data-node-02 kernel: IPVS: Creating netns size=2040 id=0
Aug 27 22:56:19 data-node-02 kernel: IPVS: ipvs loaded.
Aug 27 22:56:19 data-node-02 Keepalived_healthcheckers[2562]: Opening file '/etc/keepalived/keepalived.conf'.
Aug 27 22:56:21 data-node-02 Keepalived_vrrp[2563]: VRRP_Instance(GFS_HA_1) Changing effective priority from 90 to 110
Aug 27 23:01:01 data-node-02 systemd: Started Session 3 of user root.
Aug 27 23:01:01 data-node-02 systemd: Starting Session 3 of user root.
Aug 27 23:03:09 data-node-02 Keepalived_vrrp[2563]: VRRP_Instance(GFS_HA_1) Transition to MASTER STATE
Aug 27 23:03:11 data-node-02 Keepalived_vrrp[2563]: VRRP_Instance(GFS_HA_1) Entering MASTER STATE
Aug 27 23:03:11 data-node-02 Keepalived_vrrp[2563]: VRRP_Instance(GFS_HA_1) setting protocol VIPs.
Aug 27 23:03:11 data-node-02 Keepalived_vrrp[2563]: Sending gratuitous ARP on ens34 for 172.16.10.220
Aug 27 23:03:11 data-node-02 Keepalived_vrrp[2563]: VRRP_Instance(GFS_HA_1) Sending/queueing gratuitous ARPs on ens34 for 172.16.10.220
Aug 27 23:03:11 data-node-02 Keepalived_vrrp[2563]: Sending gratuitous ARP on ens34 for 172.16.10.220
Aug 27 23:03:11 data-node-02 Keepalived_vrrp[2563]: Sending gratuitous ARP on ens34 for 172.16.10.220
Aug 27 23:03:11 data-node-02 Keepalived_vrrp[2563]: Sending gratuitous ARP on ens34 for 172.16.10.220
Aug 27 23:03:11 data-node-02 Keepalived_vrrp[2563]: Sending gratuitous ARP on ens34 for 172.16.10.220
Aug 27 23:03:11 data-node-02 systemd: Stopping GlusterFS, a clustered file-system server...
Aug 27 23:03:11 data-node-02 systemd: Starting GlusterFS, a clustered file-system server...
Aug 27 23:03:12 data-node-02 systemd: Started GlusterFS, a clustered file-system server.
Aug 27 23:03:16 data-node-02 Keepalived_vrrp[2563]: Sending gratuitous ARP on ens34 for 172.16.10.220
Aug 27 23:03:16 data-node-02 Keepalived_vrrp[2563]: VRRP_Instance(GFS_HA_1) Sending/queueing gratuitous ARPs on ens34 for 172.16.10.220
Aug 27 23:03:16 data-node-02 Keepalived_vrrp[2563]: Sending gratuitous ARP on ens34 for 172.16.10.220
Aug 27 23:03:16 data-node-02 Keepalived_vrrp[2563]: Sending gratuitous ARP on ens34 for 172.16.10.220
Aug 27 23:03:16 data-node-02 Keepalived_vrrp[2563]: Sending gratuitous ARP on ens34 for 172.16.10.220
Aug 27 23:03:16 data-node-02 Keepalived_vrrp[2563]: Sending gratuitous ARP on ens34 for 172.16.10.220
在客户端上测试存储是否仍然可用
[root@localhost ~]# df -Th Filesystem Type Size Used Avail Use% Mounted on /dev/mapper/cl-root xfs 40G 1.2G 39G 3% / devtmpfs devtmpfs 1.9G 0 1.9G 0% /dev tmpfs tmpfs 1.9G 0 1.9G 0% /dev/shm tmpfs tmpfs 1.9G 8.6M 1.9G 1% /run tmpfs tmpfs 1.9G 0 1.9G 0% /sys/fs/cgroup /dev/sda1 xfs 1014M 139M 876M 14% /boot tmpfs tmpfs 378M 0 378M 0% /run/user/0 172.16.10.220:rep_vol1 fuse.glusterfs 10G 136M 9.9G 2% /data [root@localhost ~]# ls /data/ 111 1.txt 2.txt anaconda-ks.cfg test test-1 test-2 test-3 [root@localhost ~]# touch /data/test.log [root@localhost ~]# ls -l /data/ total 964 drwxr-xr-x 3 root root 4096 Aug 27 21:58 111 -rw-r--r-- 1 root root 10 Aug 27 21:23 1.txt -rw-r--r-- 1 root root 6 Aug 27 21:36 2.txt -rw------- 1 root root 2135 Aug 27 21:44 anaconda-ks.cfg drwxr-xr-x 2 root root 4096 Aug 27 22:59 test -rw------- 1 root root 324951 Aug 27 21:23 test-1 -rw------- 1 root root 324951 Aug 27 21:23 test-2 -rw------- 1 root root 324951 Aug 27 21:23 test-3 -rw-r--r-- 1 root root 0 Aug 27 23:05 test.log
查看节点1状态
[root@data-node-01 ~]# ip a show dev ens34
3: ens34: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc pfifo_fast state UP qlen 1000
link/ether 00:0c:29:b2:b5:2a brd ff:ff:ff:ff:ff:ff
inet 172.16.10.10/24 brd 172.16.10.255 scope global ens34
valid_lft forever preferred_lft forever
inet6 fe80::ce9a:ee2e:7b6c:a6bb/64 scope link
valid_lft forever preferred_lft forever
重新启动keepalived服务
[root@data-node-01 ~]# systemctl start keepalived.service
查看keepalived日志(主备状态)
Aug 27 23:07:42 data-node-01 systemd: Starting LVS and VRRP High Availability Monitor... Aug 27 23:07:43 data-node-01 Keepalived[2914]: Starting Keepalived v1.3.5 (03/19,2017), git commit v1.3.5-6-g6fa32f2 Aug 27 23:07:43 data-node-01 Keepalived[2914]: Opening file '/etc/keepalived/keepalived.conf'. Aug 27 23:07:43 data-node-01 Keepalived[2915]: Starting Healthcheck child process, pid=2916 Aug 27 23:07:43 data-node-01 systemd: Started LVS and VRRP High Availability Monitor. Aug 27 23:07:43 data-node-01 Keepalived[2915]: Starting VRRP child process, pid=2917 Aug 27 23:07:43 data-node-01 Keepalived_vrrp[2917]: Registering Kernel netlink reflector Aug 27 23:07:43 data-node-01 Keepalived_vrrp[2917]: Registering Kernel netlink command channel Aug 27 23:07:43 data-node-01 Keepalived_vrrp[2917]: Registering gratuitous ARP shared channel Aug 27 23:07:43 data-node-01 Keepalived_vrrp[2917]: Opening file '/etc/keepalived/keepalived.conf'. Aug 27 23:07:43 data-node-01 Keepalived_vrrp[2917]: WARNING - default user 'keepalived_script' for script execution does not exist - please create. Aug 27 23:07:43 data-node-01 Keepalived_vrrp[2917]: SECURITY VIOLATION - scripts are being executed but script_security not enabled. Aug 27 23:07:43 data-node-01 Keepalived_vrrp[2917]: Sync group GFS_HA_GROUP has only 1 virtual router(s) - removing Aug 27 23:07:43 data-node-01 Keepalived_vrrp[2917]: VRRP_Instance(GFS_HA_1) removing protocol VIPs. Aug 27 23:07:43 data-node-01 Keepalived_vrrp[2917]: Using LinkWatch kernel netlink reflector... Aug 27 23:07:43 data-node-01 Keepalived_vrrp[2917]: VRRP_Instance(GFS_HA_1) Entering BACKUP STATE Aug 27 23:07:43 data-node-01 Keepalived_vrrp[2917]: VRRP sockpool: [ifindex(3), proto(112), unicast(0), fd(10,11)] Aug 27 23:07:43 data-node-01 Keepalived_vrrp[2917]: VRRP_Script(monitor_glusterfs_status) succeeded Aug 27 23:07:43 data-node-01 kernel: nf_conntrack version 0.5.0 (16384 buckets, 65536 max) Aug 27 23:07:43 data-node-01 kernel: IPVS: Registered protocols (TCP, UDP, SCTP, AH, ESP) Aug 27 23:07:43 data-node-01 kernel: IPVS: Connection hash table configured (size=4096, memory=64Kbytes) Aug 27 23:07:43 data-node-01 kernel: IPVS: Creating netns size=2040 id=0 Aug 27 23:07:43 data-node-01 Keepalived_healthcheckers[2916]: Opening file '/etc/keepalived/keepalived.conf'. Aug 27 23:07:43 data-node-01 kernel: IPVS: ipvs loaded. Aug 27 23:07:45 data-node-01 Keepalived_vrrp[2917]: VRRP_Instance(GFS_HA_1) Changing effective priority from 100 to 120
由此可见当节点1故障恢复后，keepalived会进入到备用状态，同时继续监管GlusterFS服务，当节点2故障时会将服务、存储和VIP切换到节点1，继续对外提供存储服务，从而实现存储的高可用
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