ssdb集群+keepalived搭建实战-1.基础环境搭建
环境
操作系统：CentOS Linux release 7.6.1810 (Core)
ssdb：1.9.7
IP：
主： 10.80.2.121
从： 10.80.2.85
vip：10.80.2.156
磁盘分区
使用lvm工具分配磁盘资源，将大数据盘分配给ssdb：
1.确认磁盘情况
[root@prodssdb-001 ~]# fdisk -l
Disk /dev/sdb: 17592.2 GB, 17592186044416 bytes, 34359738368 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/sda: 42.9 GB, 42949672960 bytes, 83886080 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x00036fce
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 41943039 19921920 8e Linux LVM
Disk /dev/mapper/centos-root: 18.2 GB, 18249416704 bytes, 35643392 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/centos-swap: 2147 MB, 2147483648 bytes, 4194304 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
2.创建物理卷pv
客户提供了16t硬盘空间来存放ssdb数据，将其全部转化为物理卷：
[root@prodssdb-001 ~]# pvs
PV VG Fmt Attr PSize PFree
/dev/sda2 centos lvm2 a-- <19.00g 0
[root@prodssdb-001 ~]# pvcreate /dev/sdb
Physical volume "/dev/sdb" successfully created.
[root@prodssdb-001 ~]# pvs
PV VG Fmt Attr PSize PFree
/dev/sda2 centos lvm2 a-- <19.00g 0
/dev/sdb lvm2 --- 16.00t 16.00t
3.创建卷组vg：
创建卷组用来存放ssdb数据，命名为vg_database
[root@prodssdb-001 ~]# vgs
VG #PV #LV #SN Attr VSize VFree
centos 1 2 0 wz--n- <19.00g 0
[root@prodssdb-001 ~]# vgcreate vg_database /dev/sdb
Volume group "vg_database" successfully created
[root@prodssdb-001 ~]# vgs
VG #PV #LV #SN Attr VSize VFree
centos 1 2 0 wz--n- <19.00g 0
vg_database 1 0 0 wz--n- <16.00t <16.00t
4.创建逻辑卷lv：
[root@prodssdb-001 ~]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
root centos -wi-ao---- <17.00g
swap centos -wi-ao---- 2.00g
[root@prodssdb-001 ~]# lvcreate -n lv_database -l 100%FREE vg_database
Logical volume "lv_database" created.
[root@prodssdb-001 ~]# lvs
LV VG Attr LSize Pool Origin Data% Meta% Move Log Cpy%Sync Convert
root centos -wi-ao---- <17.00g
swap centos -wi-ao---- 2.00g
lv_database vg_database -wi-a----- <16.00t
分配磁盘
1.初始化磁盘
首先确认内核版本：
[root@prodssdb-001 ~]# uname -r
3.10.0-957.el7.x86_64
再根据内核版本初始化磁盘：
[root@prodssdb-001 ~]# mkfs.xfs /dev/mapper/vg_database-lv_database
meta-data=/dev/mapper/vg_database-lv_database isize=512 agcount=16, agsize=268435455 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=0, sparse=0
data = bsize=4096 blocks=4294966272, imaxpct=5
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0 ftype=1
log =internal log bsize=4096 blocks=521728, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
ps：这里由于磁盘容量达到了16t，可考虑根据业务场景修改inode size，可以节约硬盘资源
2.挂载磁盘
修改fstab脚本，添加磁盘信息：
[root@prodssdb-001 ~]# vim /etc/fstab
/dev/vg_database/lv_database /opt/data xfs defaults 0 0
创建磁盘目录：
[root@prodssdb-001 ~]# mkdir -p /opt/data
挂载磁盘：
[root@prodssdb-001 ~]# mount -a
确认磁盘状态：
[root@prodssdb-001 ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/centos-root 17G 1.4G 16G 9% /
devtmpfs 2.0G 0 2.0G 0% /dev
tmpfs 2.0G 0 2.0G 0% /dev/shm10
tmpfs 2.0G 8.5M 2.0G 1% /run
tmpfs 2.0G 0 2.0G 0% /sys/fs/cgroup
/dev/sda1 1014M 133M 882M 14% /boot
tmpfs 396M 0 396M 0% /run/user/0
/dev/mapper/vg_database-lv_database 16T 33M 16T 1% /opt/data
