RHCA436-基于CentOS8pacemaker+corosync gfs2集群文件系统

配置集群文件系统

准备工作，指在红帽实验环境

lab start gfs-create

1.设置集群状态

pcs property set no-quorum-policy=freeze
pcs property   查看配置
pcs property list --all
pcs property show property

man pacemaker-schedulerd 查看帮助
no-quorum-policy = enum [stop]
           What to do when the cluster does not have quorum
           What to do when the cluster does not have quorum Allowed values: stop, freeze, ignore, demote, suicide

no-quorum-policy表示当达到小于最低仲裁数量时，默认集群会停止所有资源，freeze表示已经运行的resource还是运行的，但是不能加入新的resource了，集群保持原有状态，直到仲裁恢复；ignore表示忽略，继续运行

2.所有节点安装软件包

yum -y install gfs2-utils

3.格式化文件系统

mkfs.gfs2 -j 4 -t cluster1:gfsdata /dev/sharevg/sharelv1

-t：指定集群名称
-j：指定日志数量，不指定默认是1
-J：指定日志大小，最小和默认都是8M，最大1G，红帽推荐大于128M

#查看日志大小
gfs2_edit -p journals /dev/mapper/sharevg-sharelv1

Block #Journal Status:       of 524288 (0x80000) 
-------------------- Journal List --------------------
journal0: 0x12    8MB clean.
journal1: 0x81b   8MB dirty.
journal2: 0x1024  8MB clean.
journal3: 0x182d  8MB clean.
------------------------------------------------------

#查看集群信息
[root@nodec ~]# tunegfs2 -l /dev/sharevg/sharelv1 
tunegfs2 (Jun  9 2020 13:30:19)
File system volume name: cluster1:gfsdata
File system UUID: 9194a2ca-da3b-41bc-9611-a97a7db658e2
File system magic number: 0x1161970
Block size: 4096
Block shift: 12
Root inode: 9284
Master inode: 2072
Lock protocol: lock_dlm
Lock table: cluster1:gfsdata

4.创建文件系统资源

pcs resource create clusterfs Filesystem device=/dev/sharevg/sharelv1 directory=/srv/data fstype=gfs2 op monitor interval=10s on-fail=fence --group=LVMshared

5.查看资源状态

pcs status --full

6.查看挂载情况

[root@nodea ~]# mount | grep gfs2
/dev/mapper/sharevg-sharelv1 on /srv/data type gfs2 (rw,relatime,seclabel)
[root@nodeb ~]#  mount | grep gfs2
/dev/mapper/sharevg-sharelv1 on /srv/data type gfs2 (rw,relatime,seclabel)
[root@nodec ~]#  mount | grep gfs2
/dev/mapper/sharevg-sharelv1 on /srv/data type gfs2 (rw,relatime,seclabel)

7.扩展文件系统

[root@nodea ~]# lvextend -L 2G /dev/sharevg/sharelv1
[root@nodea ~]# gfs2_grow -T /dev/sharevg/sharelv1
[root@nodea ~]# df -hT | grep gfs2
/dev/mapper/sharevg-sharelv1 gfs2      2.0G   37M  2.0G   2% /srv/data
[root@nodeb ~]# df -hT | grep gfs2
/dev/mapper/sharevg-sharelv1 gfs2      2.0G   37M  2.0G   2% /srv/data
[root@nodec ~]# df -hT | grep gfs2
/dev/mapper/sharevg-sharelv1 gfs2      2.0G   37M  2.0G   2% /srv/data

8.修改集群文件系统标签

tunegfs2 -o locktable=cluster1:gfs /dev/sharevg/sharelv1 
tunegfs2 -l /dev/sharevg/sharelv1   | grep 'Lock table'
Lock table: cluster1:gfsdata

配置安装httpd服务

在三个node中执行：
yum install httpd -y
firewall-cmd --add-service=http --permanent
firewall-cmd --reload
ssh root@nodea
mkdir /var/www/html
echo "RH436 Training" > /var/www/html/index.html
restorcon -Rv /var/www/html

配置服务和ip资源

pcs resource create webip IPaddr2 ip=172.25.250.80 cidr_netmask=24 --group=myweb
pcs resource create webserver apache --group=myweb

配置资源启动顺序

pcs constraint order start LVMshared-clone then myweb